Aerosol generating article including a frame

Abstract

As an aerosol generating article (10) for use with an aerosol generating device (90) to generate an inhalable aerosol, the aerosol generating article (10) comprises: a first planar outer surface (21); a second planar outer surface (22); a cavity (30); a frame (50) positioned between the first planar outer surface (21) and the second planar outer surface (22), the frame (50) which at least partially defines the cavity (30); one or more aerosol generating materials; and an air inlet (11) and an air outlet (12), and an airflow passage extending through the cavity (30) between the air inlet (11) and the air outlet (12), wherein the air inlet (11) or the air outlet (12) extends through the first planar outer surface (21) or the first planar outer surface (22), and the frame comprises a cellulose material.

Description

Technology Field

[0001] The present disclosure relates to an aerosol generating article. The present disclosure also relates to an aerosol generating device for use with an aerosol generating article. The present disclosure also relates to an aerosol generating system comprising an aerosol generating device and an aerosol generating article. Background Technology

[0002] A conventional aerosol generating system comprises an aerosol generating device and an aerosol generating article comprising an aerosol generating substrate. In use, the aerosol generating device is positioned near or arranged to heat a heating element in contact with the aerosol generating substrate, causing the aerosol generating substrate to heat and release volatile compounds. These volatile compounds are then entrained into air drawn through the aerosol generating article. As the volatile compounds cool, they condense to form an aerosol that can be inhaled by a consumer.

[0003] Conventional aerosol generating articles may look similar to conventional cigarettes and may have similar dimensions. For example, such aerosol generating articles may be substantially cylindrical and may include an aerosol generating material in addition to other components such as a mouthpiece filter element and a cooling element arranged in the form of rods and wrapped in cigarette paper.

[0004] However, a significant portion of the aerosol generating material within these cylindrical aerosol generating articles may not be heated sufficiently to form an aerosol during use. This is undesirable because the insufficiently heated portion of the aerosol generating material contributes to the manufacturing and transportation costs of the aerosol generating article but does not contribute to the aerosol delivered to the consumer. Additionally, the components of these cylindrical aerosol generating articles generally need to have the same or very similar outer diameters so that they can be joined, accurately positioned in axial alignment, and wrapped in cigarette paper. This can increase manufacturing costs and complexity.

[0005] The object of the present disclosure is to provide an aerosol generating article in which a larger portion of the aerosol generating material is heated sufficiently to form an aerosol during use. Additionally, the object of the present disclosure is to provide an aerosol generating article that can be manufactured relatively efficiently and at a low cost.

[0006] The aerosol generating article according to the present disclosure may preferably be a substantially flat article or a substantially planar article. Such an article has a large base area relative to the volume of the article. Advantageously, a larger base area may provide a larger surface area for heating by a planar heater of the aerosol generating device. Advantageously, a smaller height may allow for a smaller temperature gradient or difference across the height of the aerosol generating article during heating. For example, if the base of the aerosol generating article is in contact with a planar heater and heated by it, a smaller gap or height between the base and the upper surface may result in a smaller temperature difference between the base and the upper surface facing the base. Advantageously, this may minimize the risk of the hottest part of the substrate closest to the heater burning while enabling a greater proportion of the aerosol-forming substrate of the aerosol generating article to the temperature at which the aerosol is released. Alternatively or additionally, this may reduce the time required to heat the aerosol-forming substrate sufficiently to release the aerosol.

[0007] An aerosol generating article is provided for use with an aerosol generating device to generate an aerosol. The aerosol generating article may be defined by the article length, article width, and article thickness. The article width may be greater than the article thickness. The aerosol generating article may include opposing individual upper and lower outer walls. The upper and lower outer walls may collectively define all or most of the perimeter of the aerosol generating article. The aerosol generating article may include a cavity located within the aerosol generating article between the upper outer wall and the lower outer wall. The aerosol generating article may include one or more aerosol generating materials. The aerosol generating article may include an air inlet. The aerosol generating article may include an air outlet. The aerosol generating article may include an airflow passage extending through the cavity between the air inlet and the air outlet. The air inlet or the air outlet may extend through a first upper outer wall or a lower outer wall.

[0008] Additionally, an aerosol generating article is provided for use with an aerosol generating device to generate an aerosol, wherein the aerosol generating article is defined by the article length, article width, and article thickness, the article width being greater than the article thickness, and the aerosol generating article comprises: upper and lower outer walls as opposing individual upper and lower outer walls, collectively defining all or most of the perimeter of the aerosol generating article; a cavity located within the aerosol generating article between the upper outer wall and the lower outer wall; one or more aerosol generating materials; and an air inlet and an air outlet, and an airflow passage extending through the cavity between the air inlet and the air outlet, wherein the air inlet or the air outlet extends through the upper outer wall or the lower outer wall.

[0009] Additionally, an aerosol generating article is provided for use with an aerosol generating device to generate an aerosol. The aerosol generating article may include a first planar outer surface. The aerosol generating article may include a second planar outer surface. The aerosol generating article may include a cavity. The aerosol generating article may include a frame located between the first planar outer surface and the second planar outer surface. The frame may define the cavity at least partially. The aerosol generating article may include one or more aerosol generating materials. The aerosol generating article may include an air inlet. The aerosol generating article may include an air outlet. The aerosol generating article may include an airflow passage extending through the cavity between the air inlet and the air outlet. The air inlet and the air outlet may extend through the first planar outer surface or the second planar outer surface.

[0010] Additionally, an aerosol generating article is provided for use with an aerosol generating device to generate an aerosol, wherein the aerosol generating article comprises: a first planar outer surface; a second planar outer surface; a cavity; a frame positioned between the first planar outer surface and the second planar outer surface, the frame defining at least partially the cavity; one or more aerosol generating materials; and an air inlet and an air outlet, and an airflow passage extending through the cavity between the air inlet and the air outlet, wherein the air inlet or the air outlet extends through the first planar outer surface or the first planar outer surface.

[0011] The inventors have discovered that aerosol-generating articles are typically stored with their longitudinal axis perpendicular.

[0012] Advantageously, by providing at least one of an air inlet and an air outlet on a first planar outer layer or a second planar outer layer, an aerosol generating article that can be stored such that the downward-facing surface does not have an opening defining the air inlet or the air outlet. This configuration can reduce the risk of the aerosol generating material falling out of the aerosol generating article through the air inlet or the air outlet.

[0013] Advantageously, providing at least one of an air inlet and an air outlet in the first planar outer layer or the second planar outer layer can provide improved fluid communication between the cavity of the aerosol generating article and the air inlet of the aerosol generating device.

[0014] Advantageously, by providing at least one of an air inlet and an air outlet in the first planar outer layer or the second planar outer layer, it is easier to form the air inlet or air outlet through a larger surface than through a smaller surface, thereby enabling a manufacturing process with reduced complexity.

[0015] The aerosol-generating article may include opposing individual upper and lower outer walls. A cavity may be located between the upper outer wall and the lower outer wall.

[0016] The upper outer wall and the lower outer wall can collectively define all or most of the perimeter of the aerosol-generating article.

[0017] The aerosol generating article may include a first planar outer surface and a second planar outer surface.

[0018] The first planar outer surface can form at least a portion of the upper outer wall. The first planar outer surface can form the upper outer wall. The second planar outer surface can form at least a portion of the lower outer wall. The second planar outer surface can form the lower outer wall.

[0019] The aerosol generating article may include a first planar outer layer and a second planar outer layer.

[0020] The first planar outer layer can form at least a portion of the upper outer wall. The first planar outer layer can form the upper outer wall. The second planar outer layer can form at least a portion of the lower outer wall. The second planar outer layer can form the lower outer wall.

[0021] The aerosol generating article may include a first aerosol generating substrate layer and a second aerosol generating layer.

[0022] The first aerosol generating layer may form at least a portion of the upper outer wall. The first aerosol generating layer may form the upper outer wall. The second aerosol generating layer may form at least a portion of the lower outer wall. The second aerosol generating layer may form the lower outer wall.

[0023] The first outer wall can define a first outwardly convex outer surface, and the lower outer wall can define a second outwardly convex outer surface. The first and second outwardly convex outer surfaces together can define a lens-shaped contour.

[0024] The opposing end of the upper outer wall meets the corresponding opposing end of the lower outer wall to define a pair of laterally opposing edges of the aerosol-generating article.

[0025] The upper outer wall can be attached to the upper surface of the frame, and the lower outer wall can be attached to the lower surface of the frame.

[0026] An aerosol generating article may have a resistance to suction (RTD) of less than 20 mm H2O, for example, less than 10 mm H2O, in the direction of the airflow path. An aerosol generating article may have an RTD of less than 20 mm H2O, for example, less than 10 mm H2O, in at least one direction in the x / y plane of the aerosol generating article. An aerosol generating article having a low resistance airflow path enables excellent airflow management and allows aerosols to be extracted more efficiently from the aerosol generating article and delivered to the user.

[0027] Unless otherwise specified, resistance to suction (RTD) is measured in accordance with ISO 6565-2015. RTD refers to the pressure required to force air through the entire length of a component, such as in an aerosol-generating article. The terms "pressure drop" or "resistance to suction" with respect to a component or article may also refer to "resistance to suction." These terms generally refer to measurements performed under testing in accordance with ISO 6565-2015 at a temperature of approximately 22°C, a pressure of approximately 101 kPa (approx. 760 Torr), and a relative humidity of approximately 60%, at a volumetric flow rate of approximately 17.5 mm / s at the output or downstream end of the component.

[0028] An aerosol generating article may have length, width, and thickness. An aerosol generating article may have a length extending in the x-direction. An aerosol generating article may have a width extending in the y-direction. An aerosol generating article may have a thickness extending in the z-direction.

[0029] The aerosol generating article may include an x / y plane. The x / y plane may extend through the geometric center of the aerosol generating article. The x / y plane may define a plane of symmetry of the aerosol generating article. The air inlet and air outlet may be symmetrical and, for example, may have a shape or position symmetric about the x / y plane.

[0030] The aerosol generating article may include an x / z plane. The x / z plane may extend through the geometric center of the aerosol generating article. The x / z plane may define the plane of symmetry of the aerosol generating article. The air inlet and air outlet may be symmetrical and may have a shape or position symmetric about, for example, the x / z plane.

[0031] The aerosol generating article may include a y / z plane. The y / z plane may extend through the geometric center of the aerosol generating article. The y / z plane may define the plane of symmetry of the aerosol generating article. The air inlet and air outlet may be symmetric, and, for example, may have a symmetrical shape or be positioned with respect to the y / z plane.

[0032] Advantageously, a symmetric aerosol generating article or an article having symmetrically shaped or positioned air inlets and air outlets allows the aerosol generating article to be inserted into an aerosol generating device in multiple orientations.

[0033] The aerosol generating article may be substantially flat or substantially planar. In particular, the thickness of the aerosol generating article may be less than 50 percent of both the length and width of the aerosol generating article. Advantageously, a thinner thickness may provide a small temperature gradient or temperature difference across the thickness of the aerosol generating substrate during heating. Advantageously, this allows a larger proportion of the aerosol generating substrate to be heated to the temperature at which the aerosol is released while minimizing the risk of burning the hottest part of the aerosol generating substrate closest to the heater. Advantageously, this may also reduce the time required to heat the aerosol generating substrate sufficiently to release the aerosol.

[0034] Aerosol-generating articles can have a three-dimensional shape.

[0035] The aerosol generating article may have a quadrilateral cuboid shape. The aerosol generating article may have a right-angled prism shape. The aerosol generating article may have a cube shape. The aerosol generating article may have a rectangular prism shape. The aerosol generating article may have a right-angled rectangular prism shape. The aerosol generating article may have a parallelepiped shape.

[0036] The aerosol generating article may have a cylindrical shape. The aerosol generating article may have a rectangular cylindrical shape. The aerosol generating article may have an elliptical cylindrical shape. The aerosol generating article may have a puck shape.

[0037] Aerosol-generating products can have an elongated shape.

[0038] When viewed in a planar view, the aerosol generating article may have a shape defining a polygon, a square (e.g., a rectangle or a square), an ellipse, or a circle, or a combination thereof. If the aerosol generating article substantially comprises planar upper and lower surfaces, when viewed in a planar view, one or both of the upper and lower surfaces may have a shape defining a polygon, a square (e.g., a rectangle or a square), an ellipse, a circle, or a combination thereof. When viewed in a planar view, the perimeter of the aerosol generating article may be formed by a plurality of straight sides, a plurality of curved sides, or a combination of straight sides and curved sides. If the aerosol generating article substantially comprises planar upper and lower surfaces, when viewed in a planar view, the perimeter of one or both of the upper and lower surfaces may have a shape defining a polygon, a square (e.g., a rectangle or a square), an ellipse, a circle, or a combination thereof.

[0039] The aerosol generating article may have a laminated structure, for example, the aerosol generating article may include or be formed of at least two layers. In particular, as discussed in more detail below, the aerosol generating article may include at least two of a first outer layer, a second outer layer, a frame, a first frame layer, a second frame layer, a third frame layer, a first aerosol generating substrate layer, and a second aerosol generating substrate layer.

[0040] A substantial portion of the aerosol-generating article, excluding one or more aerosol-generating materials and (if present) adhesive, may be paper or cardboard.

[0041] Aerosol-generating articles may have a cellulose acetate content of less than 5%. Aerosol-generating articles may have a cellulose acetate content of less than 3%. Aerosol-generating articles may have a cellulose acetate content of less than 1%.

[0042] The aerosol-generating article may include a frame. The frame may be located between an upper outer wall and a lower outer wall. The frame may be a flat frame. The frame may define a cavity at least partially.

[0043] The frame may define a frame aperture that extends through the thickness of the frame. The frame aperture may define or form an airflow passage for the aerosol-generating article. The frame aperture may define or form a cavity for the aerosol-generating article. For example, the frame may have a hollow rectangular shape or a square hollow tube shape. As a further embodiment, the frame may have a cross-section that is annular in shape, preferably the cross-section in the x / y plane is annular. The cross-section may have an annular shape such as a circular annular shape, an elliptical annular shape, a rectangular annular shape, or a square annular shape.

[0044] The frame may include an outer surface of the frame. The outer surface of the frame may extend transversely, for example, between a first planar outer surface and a second planar outer surface. The outer surface of the frame may at least partially define or form one or more outer surfaces of an aerosol-generating article. For example, the outer surface of the frame may at least partially define or form one or more outer walls of an aerosol-generating article. The outer surface of the frame may surround or encircle the frame aperture. The outer surface of the frame may surround or encircle the cavity.

[0045] The frame may include an inner surface of the frame. The inner surface of the frame may extend laterally, for example, between a first planar outer surface and a second planar outer surface. The inner surface of the frame may define or form an outer wall of the frame aperture. The inner surface of the frame may define or form an outer wall of the cavity. The inner surface of the frame may surround or encircle a frame perforation extending through the thickness of the frame. The outer surface of the frame may surround or encircle the cavity.

[0046] The outer surface of the frame may surround or encircle the inner surface of the frame. The inner surface of the frame and the outer surface of the frame may be concentric with each other.

[0047] The frame may define or form at least 75% of the periphery of any cross-section of an aerosol-generating article extending through the frame in the x / y plane. The frame may define or form at least 80% of the periphery of any cross-section of an aerosol-generating article extending through the frame in the x / y plane. The frame may define or form at least 85% of the periphery of any cross-section of an aerosol-generating article extending through the frame in the x / y plane. The frame may define or form at least 90% of the periphery of any cross-section of an aerosol-generating article extending through the frame in the x / y plane. The frame may define or form at least 95% of the periphery of any cross-section of an aerosol-generating article extending through the frame in the x / y plane. The frame may define or form at least 99% of the periphery of any cross-section of an aerosol-generating article extending through the frame in the x / y plane.

[0048] Advantageously, providing a frame that forms at least 75% of the periphery of any cross section of an aerosol-generating article extending through the frame in the x / y plane means that the frame extends around a substantial portion of the aerosol-generating article. Thus, the frame can provide good structural support to the aerosol-generating article.

[0049] Advantageously, providing a frame that forms at least 75% of the periphery of any cross section in the x / y plane of an aerosol-generating article extending through the frame may mean that any air inlet or air outlet defined through the article is of a size that provides satisfactory suction resistance to the aerosol-generating article.

[0050] Advantageously, in an embodiment where the aerosol generating material is located within a cavity, providing a frame that forms at least 75% of the periphery of any cross section of the aerosol generating article extending through the frame in the x / y plane allows the frame to act as a barrier to prevent the aerosol generating material from escaping from the aerosol generating article.

[0051] The aerosol generating article may include a cross section extending through a frame in a first x / y plane. The frame may form at least 99% of the periphery of the cross section in the first x / y plane. The frame may form at least 100% of the periphery of the cross section in the first x / y plane.

[0052] The aerosol generating article may include a cross section extending through a frame in a second x / y plane spaced apart from a first x / y plane in the z direction. The frame may form at least 99% of the periphery of the cross section in the second x / y plane. The frame may form 100% of the periphery of the cross section in the second x / y plane.

[0053] The air inlet may be located in the z-direction between the first x / y plane and the second x / y plane. The air outlet may be located in the z-direction between the first x / y plane and the second x / y plane.

[0054] The frame may include a first portion which is at least 30% of the frame thickness. The first portion may be at least 50% of the frame thickness. The first portion may be at least 70% of the frame thickness. The first portion may be at least 90% of the frame thickness. The frame forms 100% of the periphery of any cross-section of an aerosol-generating article extending through the first portion of the frame in the x / y plane.

[0055] The aerosol generating article may include one or more outer walls extending between a first planar outer surface and a second planar outer surface. The one or more outer walls may collectively define the entire transverse outer area of ​​the aerosol generating article. A frame may define at least partially each of the one or more outer walls.

[0056] One or more external walls may surround or encircle the cavity.

[0057] The frame may define at least 60% of the total transverse outer area of ​​the aerosol-generating article. The frame may define at least 60% of the total transverse outer area of ​​the aerosol-generating article. The frame may define at least 70% of the total transverse outer area of ​​the aerosol-generating article. The frame may define at least 80% of the total transverse outer area of ​​the aerosol-generating article. The frame may define at least 90% of the total transverse outer area of ​​the aerosol-generating article.

[0058] The walls laterally facing the frame may define part of the periphery of the aerosol-generating article. The periphery of the aerosol-generating article may be at least partially defined by a combination of the walls laterally facing the frame and the upper and lower outer walls.

[0059] The frame may include periphery walls. Periphery walls may surround or encircle at least a portion of the frame aperture extending through the thickness of the frame. Periphery walls may surround or encircle at least a portion of the cavity. Periphery walls may surround or encircle the frame aperture extending through the thickness of the frame. Periphery walls may surround or encircle the cavity. Advantageously, these periphery walls allow for a relatively large internal volume for an aerosol-generating substrate or aerosol formation while providing structural strength to maintain the shape of the aerosol-generating article.

[0060] The periphery wall may be defined or formed by the outer surface of the frame and the inner surface of the frame. The periphery wall may at least partially define or form one or more outer surfaces or walls of the aerosol-generating article. The periphery wall may define or form the outer wall of the frame aperture. The periphery wall may define or form the outer wall of the cavity.

[0061] The surrounding walls may have a radial thickness. The radial thickness can be defined, for example, as the minimum distance between the outer surface of the frame and the inner surface of the frame in the x / y plane.

[0062] The periphery wall may have a radial thickness of 0.5 mm or more. The periphery wall may have a radial thickness of 1 mm or more. The periphery wall may have a radial thickness of 1.5 mm or more. The periphery wall may have a radial thickness of 2 mm or more. The periphery wall may have a radial thickness of 2.5 mm or more.

[0063] The surrounding walls may have a radial thickness of 4 mm or less. The surrounding walls may have a radial thickness of 3.5 mm or less. The surrounding walls may have a radial thickness of 3 mm or less. The surrounding walls may have a radial thickness of 2.5 mm or less. The surrounding walls may have a radial thickness of 2 mm or less.

[0064] The periphery wall may have a radial thickness of 0.5 mm to 3.5 mm. The periphery wall may have a radial thickness of 0.5 mm to 3 mm. The periphery wall may have a radial thickness of 0.5 mm to 2.5 mm. The periphery wall may have a radial thickness of 1 mm to 3 mm. The periphery wall may have a radial thickness of 1 mm to 2 mm. Advantageously, a periphery wall having a radial thickness of 0.5 mm to 3.5 mm has been found to provide good structural strength to the aerosol-generating article without using an excess amount of material that could increase manufacturing costs. Advantageously, a radial thickness of 0.5 mm to 3.5 mm can limit the amount of heat undesirably transferred to the frame rather than to the aerosol-generating substrate.

[0065] The frame may be manufactured from or contain biodegradable materials. The frame may be manufactured entirely from biodegradable materials.

[0066] The frame may be manufactured from or contain a cellulose material. The cellulose material may contain a sheet of cellulose material. The cellulose material may contain cellulose fibers. The cellulose material may be paper, cardboard, or cardboard. The frame may be manufactured from or contain a plant material such as tobacco. The frame may be manufactured entirely from a cellulose material.

[0067] The frame may be manufactured from or contain a fibrous material. The frame may be manufactured from one or more of natural fibers, synthetic fibers, polyester, bonded polyolefin, polyethylene, tylene, polypropylene, biopolymer fibers, nylon fibers, and ceramic fibers. The frame may contain cellulose fibers.

[0068] The aerosol generating article may comprise one or more susceptor materials. The frame may comprise one or more susceptor materials. One or more susceptor materials may be in thermal contact with the aerosol generating substrate. One or more susceptor materials may be in thermal contact with an airflow passage. One or more susceptor materials may be in thermal contact with a cavity. One or more susceptor materials may be located within or on the inner surface of the frame. One or more susceptor materials may be incorporated within the material of the frame. For example, one or more susceptor materials may be incorporated within the peripheral walls of the frame. Advantageously, the presence of one or more susceptor materials enables the aerosol generating article, and thus the aerosol generating substrate, to be heated by engagement with a fluctuating electromagnetic field formed by an inductor.

[0069] One or more susceptor materials may be one or more particles, strips, threads, or wires of the susceptor material. One or more susceptor materials may be one or more sheets or layers of the susceptor material. One or more sheets or layers of the susceptor material may be in the form of a mesh of the susceptor material.

[0070] The susceptor material may comprise, in any form, one or more materials selected from the list consisting of aluminum, iron and iron alloys, nickel and nickel alloys, cobalt alloys, stainless steel alloys, copper alloys, carbon, expanded carbon, and graphite.

[0071] The frame may have a thickness of 50% or more of the thickness of the aerosol-generating article. The frame may have a thickness of 60% or more of the thickness of the aerosol-generating article. The frame may have a thickness of 70% or more of the thickness of the aerosol-generating article. The frame may have a thickness of 80% or more of the thickness of the aerosol-generating article. The frame may have a thickness of 90% or more of the thickness of the aerosol-generating article. The frame may have a thickness of 95% or more of the thickness of the aerosol-generating article.

[0072] The frame may have a thickness of 95 percent or less of the thickness of the aerosol-generating article. The frame may have a thickness of 90 percent or less of the thickness of the aerosol-generating article. The frame may have a thickness of 80 percent or less of the thickness of the aerosol-generating article. The frame may have a thickness of 70 percent or less of the thickness of the aerosol-generating article.

[0073] The frame may have a thickness of 50% to 95% of the thickness of the aerosol generating article. The frame may have a thickness of 60% to 95% of the thickness of the aerosol generating article. The frame may have a thickness of 70% to 95% of the thickness of the aerosol generating article. The frame may have a thickness of 80% to 95% of the thickness of the aerosol generating article.

[0074] The frame may have a thickness of 1 mm or more. The frame may have a thickness of 1.5 mm or more. The frame may have a thickness of 2 mm or more. The frame may have a thickness of 2.5 mm or more. The frame may have a thickness of 3 mm or more. The frame may have a thickness of 3.5 mm or more. The frame may have a thickness of 4 mm or more. The frame may have a thickness of 4.5 mm or more.

[0075] The frame may have a thickness of 5.5 mm or less. The frame may have a thickness of 5 mm or less. The frame may have a thickness of 4.5 mm or less. The frame may have a thickness of 4 mm or less. The frame may have a thickness of 3.5 mm or less. The frame may have a thickness of 3 mm or less. The frame may have a thickness of less than 2.5 mm. The frame may have a thickness of less than 2 mm. The frame may have a thickness of less than 1.5 mm.

[0076] The frame may have a thickness of 1 mm to 5.5 mm. The frame may have a thickness of 1 mm to 5 mm. Preferably, the frame may have a thickness of 1.5 mm to 5 mm.

[0077] The frame may have a length equal to the length of the aerosol-generating article. The frame may have a length of at least 90 percent of the length of the aerosol-generating article. The frame may have a length of at least 95 percent of the length of the aerosol-generating article.

[0078] The frame may have a width equal to the width of the aerosol-generating article. The frame may have a width that is at least 90% of the width of the aerosol-generating article. The frame may have a width that is at least 90% of the width of the aerosol-generating article.

[0079] The frame may be a single component. Alternatively, the frame may comprise two or more layers; that is, the frame may have a laminated structure. Advantageously, the characteristics of each layer can be individually optimized based on the relative distance between the layer and the aerosol generating substrate or heater of the aerosol generating device. Advantageously, the use of two or more layers allows for the creation and rapid adjustment of the desired thickness of the frame by adding or removing layers of sheet material. This can avoid the need to manufacture a single sheet material with the desired thickness of the frame, which may need to be subsequently modified when the desired thickness of the frame changes.

[0080] The frame may include a first frame layer and a second frame layer. The first frame layer and the second frame layer may be the only layers of the frame. That is, the frame may include two or fewer layers, or exactly two layers. The first frame layer may be an upper frame layer, and the second frame layer may be a lower frame layer.

[0081] The frame may have a thickness equal to the sum of the thickness of the first frame layer and the thickness of the second frame layer. Frame perforations may be defined through both the first frame layer and the second frame layer.

[0082] The frame may include a first frame layer, a second frame layer, and a third frame layer. The second frame layer may be located between the first frame layer and the third frame layer. The first frame layer, the second frame layer, and the third frame layer may be the only layers of the frame. That is, the frame may include three or fewer layers, or exactly three layers. The first frame layer may be an upper frame layer, the second frame layer may be an intermediate frame layer, and the third frame layer may be a lower frame layer.

[0083] The first frame layer may be in physical contact with the second frame layer. The first frame layer may be bonded to the second frame layer with an adhesive. The lower surface of the first frame layer may be bonded to the upper surface of the second frame layer with an adhesive. The adhesive may extend at least 90% around the periphery of the intersection between the first frame layer and the second frame layer. The adhesive may extend at least 95% around the periphery of the intersection between the first frame layer and the second frame layer. The adhesive may extend at least 99% around the periphery of the intersection between the first frame layer and the second frame layer.

[0084] The second frame layer may be in physical contact with the third frame layer. The second frame layer may be bonded to the third frame layer with an adhesive. The lower surface of the second frame layer may be bonded to the upper surface of the third frame layer with an adhesive. The adhesive may extend at least 90% around the periphery of the intersection between the second frame layer and the third frame layer. The adhesive may extend at least 95% around the periphery of the intersection between the second frame layer and the third frame layer. The adhesive may extend at least 99% around the periphery of the intersection between the second frame layer and the third frame layer.

[0085] The frame may have a thickness equal to the sum of the thickness of the first frame layer, the thickness of the second frame layer, and the thickness of the third frame layer. The frame perforation may be defined through the first planar layer, the second planar layer, and the third frame layer.

[0086] The first frame layer may be planar.

[0087] The first frame layer may define a first frame layer perforation extending through the thickness of the first frame layer. The first frame layer perforation may at least partially define or form a cavity of the aerosol-generating article. For example, the first frame layer may have a hollow rectangular shape or a square hollow tube shape. As a further embodiment, the first frame layer may have a cross-section that is annular in shape, preferably the cross-section in the x / y plane is annular in shape. The cross-section may have an annular shape such as a circular annular shape, an elliptical annular shape, a rectangular annular shape, or a square annular shape.

[0088] The first frame layer may include an outer surface of the first frame layer. The outer surface of the first frame layer may extend transversely, for example, between a first planar outer surface and a second planar outer surface. The outer surface of the first frame layer may at least partially define or form one or more outer surfaces of an aerosol-generating article. For example, the outer surface of the first frame layer may at least partially define or form one or more outer walls of an aerosol-generating article. The outer surface of the first frame layer may surround or enclose one or both of the first frame layer perforation and the frame perforation. The outer surface of the first frame layer may surround or enclose a cavity.

[0089] The first frame layer may include an inner surface of the first frame layer. The inner surface of the first frame layer may extend transversely, for example, between a first planar outer surface and a second planar outer surface. The inner surface of the first frame layer may define or form an outer wall of the first frame layer perforation. The inner surface of the first frame layer may at least partially define or form an outer wall of the cavity. The inner surface of the first frame layer may surround or encircle one or both of the first frame layer perforation and the frame perforation. The outer surface of the first frame layer may surround or encircle the cavity.

[0090] The outer surface of the first frame layer may surround or encircle the inner surface of the first frame layer. The inner surface of the first frame layer and the outer surface of the first frame layer may be concentric with each other.

[0091] The first frame layer may include a wall surrounding the first frame layer. The wall surrounding the first frame layer may surround or enclose one or both of the frame hole and the first frame layer hole. The wall surrounding the first frame layer may surround or enclose the cavity.

[0092] The periphery wall of the first frame layer may be defined or formed by the outer surface of the first frame layer and the inner surface of the first frame layer. The periphery wall of the first frame layer may at least partially define or form one or more outer surfaces or walls of the aerosol-generating article. The periphery wall of the first frame layer may at least partially define or form the outer wall of the first frame layer perforation. The periphery wall of the first frame layer may at least partially define or form the outer wall of the cavity.

[0093] The first frame layer may be manufactured from or include any of the aforementioned materials in relation to the frame. For example, the first frame layer may include one or more susceptor materials.

[0094] The first frame layer may be manufactured from or contain a biodegradable material. The first frame layer may be entirely manufactured from a biodegradable material.

[0095] The first frame layer may be made of or include a cellulose material. The cellulose material may include a sheet of cellulose material. The cellulose material may include cellulose fibers. The cellulose material may be paper, cardboard, or cardboard. The first frame layer may be made of or include a plant material such as tobacco. The first frame layer may be made entirely of a cellulose material.

[0096] The cellulose material may have any basis weight or range of basis weight as described above in relation to the frame.

[0097] The first frame layer can be manufactured from a fibrous material. The first frame layer can be manufactured from one or more of natural fibers, synthetic fibers, polyester, bonded polyolefin, polyethylene, tylene, polypropylene, biopolymer fibers, nylon fibers, and ceramic fibers.

[0098] If the frame contains exactly two layers, the thickness of the first frame layer may be half (50%) of the thickness of the frame. The first frame layer may have substantially the same thickness as the second frame layer. If the frame contains exactly three layers, the thickness of the first frame layer may be one-third (33.33%) of the thickness of the frame. The first frame layer may have substantially the same thickness as the second frame layer and the third frame layer, respectively.

[0099] The first frame layer may have a thickness of 0.5 mm or more. The frame may have a thickness of 1 mm or more. The first frame layer may have a thickness of 1.5 mm or more. The first frame layer may have a thickness of 2 mm or more. The first frame layer may have a thickness of 2.5 mm or more.

[0100] The first frame layer may have a thickness of 3 mm or less. The first frame layer may have a thickness of 2.5 mm or less. The first frame layer may have a thickness of 2 mm or less. The first frame layer may have a thickness of 1.5 mm or less. The first frame layer may have a thickness of 1 mm or less.

[0101] The first frame layer may have a thickness of 0.5 mm to 3 mm. The first frame layer may have a thickness of 0.5 mm to 2.5 mm. The first frame layer may have a thickness of 1 mm to 2.5 mm.

[0102] The second frame layer may be planar.

[0103] The second frame layer may define a second frame layer perforation that extends through the thickness of the second frame layer. The second frame layer perforation may at least partially define or form a cavity of the aerosol-generating article. For example, the second frame layer may have a hollow rectangular shape or a square hollow tube shape. As a further embodiment, the second frame layer may have a cross-section that is annular in shape, preferably the cross-section in the x / y plane is annular in shape. The cross-section may have an annular shape such as a circular annular shape, an elliptical annular shape, a rectangular annular shape, or a square annular shape.

[0104] The second frame layer may include an outer surface of the second frame layer. The outer surface of the second frame layer may extend transversely, for example, between the second planar outer surface and the second planar outer surface. The outer surface of the second frame layer may at least partially define or form one or more outer surfaces of the aerosol-generating article. For example, the outer surface of the second frame layer may at least partially define or form one or more outer walls of the aerosol-generating article. The outer surface of the second frame layer may surround or enclose one or both of the second frame layer perforation and the frame perforation. The outer surface of the second frame layer may surround or enclose the cavity.

[0105] The second frame layer may include an inner surface of the second frame layer. The inner surface of the second frame layer may extend transversely, for example, between the second planar outer surface and the second planar outer surface. The inner surface of the second frame layer may define or form an outer wall of the second frame layer perforation. The inner surface of the second frame layer may at least partially define or form an outer wall of the cavity. The inner surface of the second frame layer may surround or encircle one or both of the second frame layer perforation and the frame perforation. The outer surface of the second frame layer may surround or encircle the cavity.

[0106] The outer surface of the second frame layer may surround or encircle the inner surface of the second frame layer. The inner surface of the second frame layer and the outer surface of the second frame layer may be concentric with each other.

[0107] The second frame layer may include a wall surrounding the second frame layer. The wall surrounding the second frame layer may surround or enclose one or both of the frame hole and the second frame layer hole. The wall surrounding the second frame layer may surround or enclose the cavity.

[0108] The periphery wall of the second frame layer may be defined or formed by the outer surface of the second frame layer and the inner surface of the second frame layer. The periphery wall of the second frame layer may at least partially define or form one or more outer surfaces or walls of the aerosol-generating article. The periphery wall of the second frame layer may at least partially define or form the outer wall of the second frame layer perforation. The periphery wall of the second frame layer may at least partially define or form the outer wall of the cavity.

[0109] The second frame layer may be manufactured from or include any of the aforementioned materials in relation to the frame. For example, the second frame layer may include one or more susceptor materials.

[0110] The second frame layer may be made of or contain a biodegradable material. The second frame layer may be made entirely of a biodegradable material.

[0111] The second frame layer may be made of or contain a cellulose material, as the cellulose material may contain a sheet of cellulose material. The cellulose material may be paper, cardboard, or cardboard. The second frame layer may be made of or contain a plant material such as tobacco. The second frame layer may be made entirely of a cellulose material.

[0112] The cellulose material may have any basis weight or range of basis weight as described above in relation to the frame.

[0113] The second frame layer may be manufactured from a fibrous material. The second frame layer may be manufactured from one or more of natural fibers, synthetic fibers, polyester, bonded polyolefin, polyethylene, tylene, polypropylene, biopolymer fibers, nylon fibers, and ceramic fibers.

[0114] If the frame contains exactly two layers, the thickness of the second frame layer may be half (50%) of the thickness of the frame. The second frame layer may have substantially the same thickness as the first frame layer. If the frame contains exactly three layers, the thickness of the second frame layer may be one-third (33.33%) of the thickness of the frame. The second frame layer may have substantially the same thickness as the first frame layer and the third frame layer.

[0115] The second frame layer may have a thickness of 0.5 mm or more. The frame may have a thickness of 1 mm or more. The second frame layer may have a thickness of 1.5 mm or more. The second frame layer may have a thickness of 2 mm or more. The second frame layer may have a thickness of 2.5 mm or more.

[0116] The second frame layer may have a thickness of 3 mm or less. The second frame layer may have a thickness of 2.5 mm or less. The second frame layer may have a thickness of 2 mm or less. The second frame layer may have a thickness of 1.5 mm or less. The second frame layer may have a thickness of 1 mm or less.

[0117] The second frame layer may have a thickness of 0.5 mm to 3 mm. The second frame layer may have a thickness of 0.5 mm to 2.5 mm. The second frame layer may have a thickness of 1 mm to 2.5 mm.

[0118] The third frame layer may be flat.

[0119] The third frame layer may define a third frame layer perforation extending through the thickness of the third frame layer. The third frame layer perforation may at least partially define or form a cavity of the aerosol-generating article. For example, the third frame layer may have a hollow rectangular shape or a square hollow tube shape. As a further embodiment, the third frame layer may have a cross-section that is annular in shape, preferably the cross-section in the x / y plane is annular in shape. The cross-section may have an annular shape such as a circular annular shape, an elliptical annular shape, a rectangular annular shape, or a square annular shape.

[0120] The third frame layer may include an outer surface of the third frame layer. The outer surface of the third frame layer may extend transversely, for example, between the third planar outer surface and the third planar outer surface. The outer surface of the third frame layer may at least partially define or form one or more outer surfaces of the aerosol-generating article. For example, the outer surface of the third frame layer may at least partially define or form one or more outer walls of the aerosol-generating article. The outer surface of the third frame layer may surround or enclose one or both of the third frame layer perforation and the frame perforation. The outer surface of the third frame layer may surround or enclose the cavity.

[0121] The third frame layer may include an inner surface of the third frame layer. The inner surface of the third frame layer may extend transversely, for example, between the third planar outer surface and the third planar outer surface. The inner surface of the third frame layer may define or form the outer wall of the third frame layer perforation. The inner surface of the third frame layer may at least partially define or form the outer wall of the cavity. The inner surface of the third frame layer may surround or encircle one or both of the third frame layer perforation and the frame perforation. The outer surface of the third frame layer may surround or encircle the cavity.

[0122] The outer surface of the third frame layer may surround or encircle the inner surface of the third frame layer. The inner surface of the third frame layer and the outer surface of the third frame layer may be concentric with each other.

[0123] The third frame layer may include a wall surrounding the third frame layer. The wall surrounding the third frame layer may surround or enclose one or both of the frame hole and the third frame layer hole. The wall surrounding the third frame layer may surround or enclose the cavity.

[0124] The periphery wall of the third frame layer may be defined or formed by the outer surface of the third frame layer and the inner surface of the third frame layer. The periphery wall of the third frame layer may at least partially define or form one or more outer surfaces or walls of the aerosol-generating article. The periphery wall of the third frame layer may at least partially define or form the outer wall of the third frame layer perforation. The periphery wall of the third frame layer may at least partially define or form the outer wall of the cavity.

[0125] The third frame layer may be manufactured from or include any of the aforementioned materials in relation to the frame. For example, the third frame layer may include one or more susceptor materials.

[0126] The third frame layer may be made of or contain a biodegradable material. The third frame layer may be made entirely of a biodegradable material.

[0127] The third frame layer may be made of or contain a cellulose material. The cellulose material may include a sheet of cellulose material. The cellulose material may be paper, cardboard, or cardboard. The third frame layer may be made of or contain a plant material such as tobacco. The third frame layer may be made entirely of a cellulose material.

[0128] The cellulose material may have any basis weight or range of basis weight as described above in relation to the frame.

[0129] The third frame layer can be manufactured from a fibrous material. The third frame layer can be manufactured from one or more of natural fibers, synthetic fibers, polyester, bonded polyolefin, polyethylene, tylene, polypropylene, biopolymer fibers, nylon fibers, and ceramic fibers.

[0130] If the frame contains exactly three layers, the thickness of the third frame layer may be one-third (33.33%) of the thickness of the frame. The third frame layer may have substantially the same thickness as the first frame layer and the second frame layer, respectively.

[0131] The third frame layer may have a thickness of 0.5 mm or more. The frame may have a thickness of 1 mm or more. The third frame layer may have a thickness of 1.5 mm or more. The third frame layer may have a thickness of 2 mm or more. The third frame layer may have a thickness of 2.5 mm or more.

[0132] The third frame layer may have a thickness of 3 mm or less. The third frame layer may have a thickness of 2.5 mm or less. The third frame layer may have a thickness of 2 mm or less. The third frame layer may have a thickness of 1.5 mm or less. The third frame layer may have a thickness of 1 mm or less.

[0133] The third frame layer may have a thickness of 0.5 mm to 3 mm. The third frame layer may have a thickness of 0.5 mm to 2.5 mm. The third frame layer may have a thickness of 1 mm to 2.5 mm.

[0134] One or more aerosol generating substrates may include an aerosol generating substrate layer. Advantageously, the aerosol generating substrate layer may be made thin so as to rapidly heat and release a volatile compound to form an aerosol. Advantageously, the aerosol generating substrate layer may be located close to a heater of the aerosol generating substrate.

[0135] The aerosol generating substrate layer may comprise an aerosol generating material. The aerosol generating material may be any aerosol generating material described herein. The aerosol generating material may be in the form of a sheet of aerosol generating material. The sheet of aerosol generating material may be any sheet of aerosol generating material described herein. The aerosol generating substrate layer may be a sheet of aerosol generating material and may be manufactured entirely therefrom.

[0136] The aerosol generating substrate layer may be located between the frame and the first planar outer surface. The aerosol generating substrate layer may be located between the frame and the second planar outer surface. The aerosol generating substrate layer may be in physical contact with the frame and may be bonded to the frame. The aerosol generating substrate layer may be bonded to the frame with an adhesive.

[0137] The aerosol generating substrate layer may be positioned between the frame and the outer wrapper. The outer wrapper is discussed in more detail below. The aerosol generating substrate layer may physically contact both the frame and the outer wrapper and may be bonded thereto. The aerosol generating substrate layer may be bonded to both the frame and the outer wrapper using an adhesive.

[0138] The aerosol generating substrate layer may be located between the frame and the first planar outer layer. The aerosol generating substrate layer may be located between the frame and the second planar outer layer. The first planar outer layer and the second planar outer layer are discussed in more detail below. The aerosol generating substrate layer may be in physical contact with both the frame and the first planar outer layer and may be bonded thereto. The aerosol generating substrate layer may be bonded to both the frame and the first planar outer layer with an adhesive. The aerosol generating substrate layer may be in physical contact with both the frame and the second planar outer layer and may be bonded thereto. The aerosol generating substrate layer may be bonded to both the frame and the second planar outer layer with an adhesive.

[0139] The aerosol generating substrate layer may be placed over the end of the cavity. The aerosol generating substrate layer may define or form a wall of the cavity, such as a first cavity end wall or a second cavity end wall. Accordingly, advantageously, the aerosol generating substrate layer may be within an airflow passage or may at least partially define or form an airflow passage, thereby enabling the released volatile compound to rapidly form an aerosol.

[0140] One or more aerosol generating substrates may include a first aerosol generating substrate layer and a second aerosol generating substrate layer. Advantageously, the first and second aerosol generating substrate layers can rapidly generate a satisfactory volume of aerosol compared to using a single aerosol generating substrate layer.

[0141] The first aerosol generating substrate may include an aerosol generating material. The aerosol generating material may be any aerosol generating material described herein. The aerosol generating material may be in the form of a sheet of aerosol generating material. The sheet of aerosol generating material may be any sheet of aerosol generating material described herein. The first aerosol generating substrate layer may be a sheet of aerosol generating material and may be manufactured entirely therefrom.

[0142] The second aerosol generating substrate layer may include an aerosol generating material. The aerosol generating material may be any aerosol generating material described herein. The aerosol generating material may be in the form of a sheet of aerosol generating material. The sheet of aerosol generating material may be any sheet of aerosol generating material described herein. The second aerosol generating substrate layer may be a sheet of aerosol generating material and may be manufactured entirely therefrom.

[0143] The first aerosol generating substrate layer can form at least a portion of the upper outer wall. The first aerosol generating substrate layer can form the upper outer wall. The second aerosol generating substrate layer can form at least a portion of the lower outer wall. The second aerosol generating substrate layer can form the lower outer wall.

[0144] The first aerosol generating substrate layer may be located between the frame and the first planar outer surface. The first aerosol generating substrate layer may be in physical contact with the frame and may be bonded to the frame. For example, the first aerosol generating substrate layer may be in physical contact with the first frame layer and may be bonded to the first frame layer. The first aerosol generating substrate layer may be bonded to the frame with an adhesive. The first aerosol generating substrate layer may be bonded to the first frame layer with an adhesive. The lower surface of the first aerosol generating substrate layer may be bonded to the upper surface of the first frame layer with an adhesive.

[0145] The first aerosol generating substrate layer may be located between the frame and the outer wrapper. The first aerosol generating substrate layer may physically contact both the frame and the outer wrapper and may be bonded thereto. The first aerosol generating substrate layer may be bonded to the frame and the outer wrapper with an adhesive.

[0146] The first aerosol generating substrate layer may be located between the frame and the first planar outer layer. The first aerosol generating substrate layer may be in physical contact with both the frame and the first planar outer layer and may be bonded thereto. The first aerosol generating substrate layer may be bonded to the frame and the first planar outer layer with an adhesive.

[0147] The second aerosol generating substrate layer may be located between the frame and the second planar outer surface. The second aerosol generating substrate layer may be in physical contact with the frame and may be bonded to the frame. For example, the second aerosol generating substrate layer may be in physical contact with the second frame layer or the third frame layer and may be bonded thereto. The second aerosol generating substrate layer may be bonded to the frame with an adhesive. The second aerosol generating substrate layer may be bonded to the second frame layer or the third frame layer with an adhesive. The upper surface of the second aerosol generating substrate layer may be bonded to the lower surface of the second frame layer or the third frame layer with an adhesive.

[0148] The second aerosol generating substrate layer may be located between the frame and the outer wrapper. The second aerosol generating substrate layer may physically contact both the frame and the outer wrapper and may be bonded thereto. The second aerosol generating substrate layer may be bonded to the frame and the outer wrapper with an adhesive.

[0149] The second aerosol generating substrate layer may be located between the frame and the second planar outer layer. The second aerosol generating substrate layer may be in physical contact with both the frame and the second planar outer layer and may be bonded thereto. The second aerosol generating substrate layer may be bonded to the frame and the second planar outer layer with an adhesive.

[0150] The first aerosol generating substrate layer and the second aerosol generating substrate layer may be placed on opposite ends of the cavity. The first aerosol generating substrate layer and the second aerosol generating substrate layer may define or form walls at the opposite ends of the cavity. That is, the frame, the first aerosol generating substrate layer, and the second aerosol generating substrate layer may collectively define the cavity. That is, the cavity is defined by the frame, the first aerosol generating substrate layer, and the second aerosol generating substrate layer.

[0151] The first aerosol generating substrate layer can form at least a portion of the first planar outer surface. The first aerosol generating substrate layer can form the first planar outer surface. The second aerosol generating substrate layer can form at least a portion of the second planar outer surface. The second aerosol generating substrate layer can form the second planar outer surface.

[0152] The first aerosol generating substrate layer may form at least a portion of the first planar outer layer. The first aerosol generating substrate layer may form the first planar outer layer. The second aerosol generating substrate layer may form at least a portion of the second planar outer layer. The second aerosol generating substrate layer may form the second planar outer layer.

[0153] The aerosol generating substrate layer may be a planar aerosol generating substrate layer. The planar aerosol generating substrate layer may extend in the x direction and the y direction. That is, the planar aerosol generating substrate layer may extend in the x / y plane.

[0154] The first aerosol generating substrate layer may be a first planar aerosol generating substrate layer. The first planar aerosol generating substrate layer may be extended in the x direction and the y direction. That is, the planar aerosol generating substrate layer may first be extended in the x / y plane.

[0155] The second aerosol generating substrate layer may be a second planar aerosol generating substrate layer. The second planar aerosol generating substrate layer may be extended in the x direction and the y direction. That is, the second planar aerosol generating substrate layer may be extended in the x / y plane.

[0156] The aerosol generating substrate layer may have a thickness of 100 µm or more. The aerosol generating substrate layer may have a thickness of 200 µm or more. The aerosol generating substrate layer may have a thickness of 300 µm or more. The aerosol generating substrate layer may have a thickness of 400 µm or more. The aerosol generating substrate layer may have a thickness of 500 µm or more.

[0157] The aerosol generating substrate layer may have a thickness of 600 µm or less. The aerosol generating substrate layer may have a thickness of 500 µm or less. The aerosol generating substrate layer may have a thickness of 400 µm or less. The aerosol generating substrate layer may have a thickness of 300 µm or less. The aerosol generating substrate layer may have a thickness of 200 µm or less.

[0158] The aerosol generating substrate layer may have a thickness of 100㎛ to 600㎛. The aerosol generating substrate layer may have a thickness of 200㎛ to 500㎛. The aerosol generating substrate layer may have a thickness of 200㎛ to 400㎛. The aerosol generating substrate layer may have a thickness of 200㎛ to 300㎛.

[0159] One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 100 μm or more. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 200 μm or more. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 300 μm or more. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 400 μm or more. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 500 μm or more.

[0160] One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 600 μm or less. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 500 μm or less. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 400 μm or less. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 300 μm or less. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 200 μm or less.

[0161] One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 100 µm to 600 µm. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 200 µm to 500 µm. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 200 µm to 400 µm. One or both of the first aerosol generating substrate layer and the second aerosol generating substrate layer may have a thickness of 200 µm to 300 µm.

[0162] The aerosol generating substrate layer may have a length substantially equal to the length of the frame. The aerosol generating substrate layer may have a length substantially equal to the length of the aerosol generating article.

[0163] The first aerosol generating substrate layer may have a length substantially equal to the length of the frame. The first aerosol generating substrate layer may have a length substantially equal to the length of the aerosol generating article.

[0164] The second aerosol generating substrate layer may have a length substantially equal to the length of the frame. The second aerosol generating substrate layer may have a length substantially equal to the length of the aerosol generating article.

[0165] The aerosol generating substrate layer may have a width substantially equal to the width of the frame. The aerosol generating substrate layer may have a width substantially equal to the width of the aerosol generating article.

[0166] The first aerosol generating substrate layer may have a width substantially equal to the width of the frame. The first aerosol generating substrate layer may have a width substantially equal to the width of the aerosol generating article.

[0167] The second aerosol generating substrate layer may have a width substantially equal to the width of the frame. The second aerosol generating substrate layer may have a width substantially equal to the width of the aerosol generating article.

[0168] The first planar outer surface may be a planar upper surface, and the second planar outer surface may be a planar lower surface. The first planar outer surface may be a planar uppermost surface, and the second planar outer surface may be a planar floor surface. The first planar outer surface may be a planar ceiling surface, and the second planar outer surface may be a planar base surface.

[0169] The first planar outer surface may be positioned parallel to the second planar outer surface. The first planar outer surface may be extended in the x direction and the y direction. That is, the first planar outer surface may be extended in the x / y plane. The second planar outer surface may be extended in the x direction and the y direction. That is, the second planar outer surface may be extended in the x / y plane.

[0170] The second planar outer surface may be spaced apart from the first planar outer surface in the z-direction or transverse direction. The distance between the first planar outer surface and the second planar outer surface in the z-direction or transverse direction may define the thickness of the aerosol-generating article. That is, the thickness of the aerosol-generating article may be defined by the vertical distance between the first planar outer surface and the second planar outer surface.

[0171] The aerosol-generating article may include an outer wrapper. The outer wrapper may be hydrophobic. The outer wrapper may contain a hydrophobic material.

[0172] The aerosol-generating article may further include an outer wrapper defining an upper outer wall and a lower outer wall.

[0173] The outer wrapper may define or form a first planar outer surface. The outer wrapper may define or form a second planar outer surface. The outer wrapper may define or form both the first planar outer surface and the second planar outer surface.

[0174] The outer wrapper may surround or encircle the frame. The outer wrapper may physically contact the frame and may be bonded to the frame. The outer wrapper may be placed over the opposing ends of the cavity. The outer wrapper may define or form opposing end walls of the cavity, such as a first cavity end wall and a second cavity end wall. That is, the frame and the outer wrapper may collectively define the cavity. That is, the cavity is defined by the frame and the outer wrapper.

[0175] The outer wrapper may surround or encircle the frame and the aerosol generating substrate layer. The outer wrapper may physically contact both the frame and the aerosol generating substrate layer and may be bonded thereto.

[0176] The outer wrapper may surround or enclose the frame, the first aerosol generating substrate layer, and the second aerosol generating substrate layer. The outer wrapper may physically contact both the first aerosol generating substrate layer and the second aerosol generating substrate layer and may be bonded thereto.

[0177] The aerosol generating article may include a first planar outer layer and a second planar outer layer. The first planar outer layer may be an upper layer, and the second planar outer layer may be a lower layer. The first planar outer layer may be an uppermost layer, and the second planar outer layer may be a bottom layer. The first planar outer layer may be a ceiling layer, and the second planar outer layer may be a base layer.

[0178] The first planar outer layer may define or form a first planar outer surface. The first planar outer layer may extend in the x direction and the y direction. That is, the first planar outer layer may extend in the x / y plane. The second planar outer layer may define or form a second planar outer surface. The second planar outer layer may extend in the x direction and the y direction. That is, the second planar outer layer may extend in the x / y plane.

[0179] The first planar outer layer can be in physical contact with the frame and can be bonded to the frame. The first planar outer layer can be bonded to the frame with an adhesive. The first planar outer layer can be bonded to the first frame layer with an adhesive. The lower surface of the first planar outer layer can be bonded to the upper surface of the first frame layer with an adhesive. The adhesive can extend at least 90% around the periphery of the intersection between the first planar outer layer and the frame. The adhesive can extend at least 95% around the periphery of the intersection between the first planar outer layer and the frame. The adhesive can extend at least 99% around the periphery of the intersection between the first planar outer layer and the frame.

[0180] The first planar outer layer may be placed over the end of the cavity. The first planar outer layer may define or form a wall of the cavity such as the wall of the first cavity end.

[0181] The second planar outer layer can be in physical contact with the frame and can be bonded to the frame. The second planar outer layer can be bonded to the frame with an adhesive. The second planar outer layer can be bonded to the second frame layer with an adhesive. The upper surface of the second planar outer layer can be bonded to the lower surface of the second frame layer with an adhesive. The second planar outer layer can be bonded to the third frame layer with an adhesive. The upper surface of the second planar outer layer can be bonded to the lower surface of the third frame layer with an adhesive. The adhesive can extend at least 90% around the periphery of the intersection between the second planar outer layer and the frame. The adhesive can extend at least 95% around the periphery of the intersection between the second planar outer layer and the frame. The adhesive can extend at least 99% around the periphery of the intersection between the second planar outer layer and the frame.

[0182] The second planar outer layer may be placed over the end of the cavity. The second planar outer layer may define or form a wall of the cavity such as the second cavity end wall.

[0183] The first planar outer layer and the second planar outer layer may be placed over the opposing ends of the cavity. The first planar outer layer and the second planar outer layer may define or form the opposing end walls of the cavity, such as the first cavity end wall and the second cavity end wall. That is, the frame, the first planar outer layer, and the second planar outer layer may collectively define the cavity. In other words, the cavity is defined by the frame, the first planar outer layer, and the second planar outer layer.

[0184] The first planar outer layer may be spaced apart from the frame, for example, in the horizontal direction. For example, the aerosol generating substrate layer or the first aerosol generating substrate layer may be located between the first planar outer layer and the frame. The first planar outer layer may be in physical contact with the aerosol generating substrate layer or the first aerosol generating substrate layer and may be bonded thereto. The first planar outer layer may be bonded to the aerosol generating substrate layer or the first aerosol generating substrate layer with an adhesive.

[0185] The second planar outer layer may be spaced apart from the frame, for example, in the horizontal direction. For example, the aerosol generating substrate layer or the second aerosol generating substrate layer may be located between the second planar outer layer and the frame. The second planar outer layer may be in physical contact with and bonded to the aerosol generating substrate layer or the second aerosol generating substrate layer. The second planar outer layer may be bonded to the aerosol generating substrate layer or the second aerosol generating substrate layer with an adhesive.

[0186] The first planar outer layer may be hydrophobic. The first planar outer layer may include a hydrophobic material. The second planar outer layer may be hydrophobic. The second planar outer layer may include a hydrophobic material.

[0187] Advantageously, an adhesive bonding components of an aerosol-generating article together can provide a tight seal between layers of the aerosol-generating article. In particular, an adhesive bonding one or both of the first planar outer layer and the second planar outer layer to a frame can provide a tight seal between the first planar outer layer and the frame or a tight seal between the second planar outer layer and the frame.

[0188] Providing tight seals between layers of aerosol-generating articles can improve airflow through cavities. Improving airflow through cavities can improve the user experience.

[0189] Advantageously, using an adhesive to bond the components of an aerosol generating article together can provide an aerosol generating article having high structural integrity.

[0190] The adhesive may contain gum. The adhesive may contain guar gum. The adhesive may contain polyvinyl alcohol. The adhesive may contain an aerosol generating material. The adhesive may be composed of an aerosol generating material. For example, the adhesive may be a homogenized tobacco slurry. The adhesive may be a flavoring agent and / or an aerosol forming agent, or may contain such.

[0191] One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may be made of a cellulose material. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may include a cellulose material. The cellulose material may be paper, cardboard, wood, fabric, natural fiber, or artificial fiber.

[0192] One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may be an aerosol generating substrate comprising an aerosol generating material. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may comprise an aerosol generating material. The aerosol generating material may be any aerosol generating material described herein. In particular, the aerosol generating material may be in the form of a sheet of aerosol generating material. The sheet of aerosol generating material may be any sheet of aerosol generating material described herein. Alternatively, one or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may not comprise any aerosol generating material, particularly in an embodiment comprising an aerosol generating substrate layer, a first aerosol generating substrate layer, a second aerosol generating substrate layer, or an aerosol generating substrate located within a cavity. For example, one or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may not comprise tobacco. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may be substantially nicotine-free.

[0193] One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may include a paper material. For example, one or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may be paper, cardboard, cigarette paper, or tobacco paper.

[0194] The cellulose material may have a basis weight exceeding 10 g / m2. The cellulose material may have a basis weight exceeding 20 g / m2. The cellulose material may have a basis weight of less than 30 g / m2. The cellulose material may have a basis weight of less than 25 g / m2. The cellulose material may have a basis weight of 10 g / m2 to 30 g / m2. The cellulose material may have a basis weight of 15 g / m2 to 25 g / m2.

[0195] One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may include paper and non-paper components.

[0196] One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may exhibit a range of permeability including non-permeable. Permeability is determined using the International Standard test method ISO 2965:2009, and the result is expressed as the volume (cm³) passing through 1 cm² per minute, which is referred to as "CU (CORESTA unit)". One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a permeability of 1 to 10 CU. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a permeability of 1 to 5 CU. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a permeability of 5 to 20 CU.

[0197] One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 25 μm or more. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 30 μm or more. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 35 μm or more. The outer wrapper may have a thickness of 40 μm or more. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 45 μm or more.

[0198] One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 55 μm or less. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 50 μm or more. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 45 μm or more. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 40 μm or more. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 35 μm or more.

[0199] One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 25 μm to 55 μm. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 25 μm to 45 μm. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a thickness of 30 μm to 45 μm.

[0200] One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a length substantially equal to the length of the frame. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a length substantially equal to the length of the aerosol-generating article. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a length of 90% or more of the length of the frame. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a length of 95% or more of the length of the frame.

[0201] One or more of the first planar outer layer and the second planar outer layer may have a width substantially equal to the width of the frame. One or more of the first planar outer layer and the second planar outer layer may have a width substantially equal to the width of the aerosol-generating article. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a width of 90% or more of the width of the frame. One or more of the outer wrapper, the first planar outer layer, and the second planar outer layer may have a width of 95% or more of the width of the frame.

[0202] The cavity may include a first cavity end wall and a second cavity end wall positioned opposite the first cavity end wall. The first cavity end wall may be defined or formed by an outer wrapper, a first planar outer layer, or a first aerosol generating substrate layer. The second cavity end wall may be defined or formed by an outer wrapper, a second planar outer layer, or a second aerosol generating substrate layer. The cavity may be surrounded by the first cavity end wall, the second cavity end wall, and a frame.

[0203] The cavity may include an outer cavity wall. The outer cavity wall may be defined or formed by a frame. The outer cavity wall may extend transversely. The outer cavity wall may extend transversely between a first cavity end wall and a second cavity end wall. The outer cavity wall may be defined or formed by an inner surface of a frame. The outer cavity wall may be defined or formed by a peripheral wall of a frame.

[0204] The cavity may have at least two edges extending between a first planar outer surface and a second planar outer surface. At least two edges may be chamfered, rounded, or filleted. Preferably, all edges of the cavity extending between the first planar outer surface and the second planar outer surface are chamfered, rounded, or filleted.

[0205] Advantageously, a cavity having chamfered, rounded, or filleted edges allows the cavity to be heated more easily. In particular, this can make it easier to heat an aerosol generating material located within the cavity. Advantageously, a cavity having chamfered, rounded, or filleted edges can make the aerosol generating article stronger and less susceptible to damage. Advantageously, a cavity having chamfered, rounded, or filleted edges can make the aerosol generating article easier to manufacture.

[0206] The cavity can have a thickness substantially equal to the thickness of the frame.

[0207] The cavity may have a thickness of 30% or more of the thickness of the aerosol-generating article. The cavity may have a thickness of 40% or more of the thickness of the aerosol-generating article. The cavity may have a thickness of 50% or more of the thickness of the aerosol-generating article. The cavity may have a thickness of 60% or more of the thickness of the aerosol-generating article. The cavity may have a thickness of 70% or more of the thickness of the aerosol-generating article. The cavity may have a thickness of 80% or more of the thickness of the aerosol-generating article. The cavity may have a thickness of 90% or more of the thickness of the aerosol-generating article. The cavity may have a thickness of 95% or more of the thickness of the aerosol-generating article.

[0208] The cavity may have a thickness of 95% or less of the thickness of the aerosol-generating article. The cavity may have a thickness of 90% or less of the thickness of the aerosol-generating article. The cavity may have a thickness of 80% or less of the thickness of the aerosol-generating article. The cavity may have a thickness of 70% or less of the thickness of the aerosol-generating article.

[0209] The cavity may have a thickness of 30% to 95% of the thickness of the aerosol generating article. The cavity may have a thickness of 40% to 95% of the thickness of the aerosol generating article. The cavity may have a thickness of 50% to 90% of the thickness of the aerosol generating article. The cavity may have a thickness of 60% to 90% of the thickness of the aerosol generating article. The cavity may have a thickness of 70% to 90% of the thickness of the aerosol generating article. The cavity may have a thickness of 80% to 90% of the thickness of the aerosol generating article.

[0210] The cavity may have a thickness of 0.5 mm or more. The cavity may have a thickness of 1 mm or more. The cavity may have a thickness of 1.5 mm or more. The cavity may have a thickness of 2 mm or more. The cavity may have a thickness of 2.5 mm or more. The cavity may have a thickness of 3 mm or more. The cavity may have a thickness of 3.5 mm or more. The cavity may have a thickness of 4 mm or more.

[0211] The cavity may have a thickness of 4.5 mm or less. The cavity may have a thickness of 4 mm or less. The cavity may have a thickness of 3.5 mm or less. The cavity may have a thickness of 2.5 mm or less. The cavity may have a thickness of 2 mm or less. The cavity may have a thickness of 1.5 mm or less.

[0212] The cavity may have a thickness of 0.5 millimeters to 4.5 millimeters. The cavity may have a thickness of 1 mm to 4.5 mm. The cavity may have a thickness of 2 mm to 4 mm. Preferably, the cavity may have a thickness of 2.8 mm to 3.3 mm.

[0213] The cavity may have a length of 30% or more of the length of the aerosol-generating article. The cavity may have a length of 40% or more of the length of the aerosol-generating article. The cavity may have a length of 50% or more of the length of the aerosol-generating article. The cavity may have a length of 60% or more of the length of the aerosol-generating article. The cavity may have a length of 70% or more of the length of the aerosol-generating article. The cavity may have a length of 80% or more of the length of the aerosol-generating article. The cavity may have a length of 90% or more of the length of the aerosol-generating article.

[0214] The cavity may have a length of 95% or less of the length of the aerosol-generating article. The cavity may have a length of 90% or less of the length of the aerosol-generating article. The cavity may have a length of 80% or less of the length of the aerosol-generating article. The cavity may have a length of 70% or less of the length of the aerosol-generating article. The cavity may have a length of 60% or less of the length of the aerosol-generating article. The cavity may have a length of 55% or less of the length of the aerosol-generating article.

[0215] The cavity may have a length of 30% to 95% of the length of the aerosol-generating article. The cavity may have a length of 40% to 95% of the length of the aerosol-generating article. The cavity may have a length of 50% to 90% of the length of the aerosol-generating article. The cavity may have a length of 55% to 90% of the length of the aerosol-generating article. The cavity may have a length of 60% to 90% of the length of the aerosol-generating article. The cavity may have a length of 70% to 90% of the length of the aerosol-generating article. The cavity may have a length of 80% to 90% of the length of the aerosol-generating article.

[0216] The cavity may have a length of 14 mm or more. The cavity may have a length of 16 mm or more. The cavity may have a length of 18 mm or more. The cavity may have a length of 22 mm or more. The cavity may have a thickness of 26 mm or more. The cavity may have a thickness of 30 mm or more. The cavity may have a thickness of 34 mm or more. The cavity may have a thickness of 38 mm or more.

[0217] The cavity may have a length of 40 mm or less. The cavity may have a length of 38 mm or less. The cavity may have a thickness of 34 mm or less. The cavity may have a thickness of 30 mm or less. The cavity may have a thickness of 28 mm or less. The cavity may have a thickness of 26 mm or less. The cavity may have a thickness of 22 mm or less. The cavity may have a thickness of 18 millimeters or less.

[0218] The cavity may have a length of 14 mm to 40 mm. The cavity may have a length of 14 mm to 38 mm. The cavity may have a length of 14 mm to 34 mm. The cavity may have a length of 14 mm to 30 mm. The cavity may have a length of 16 mm to 30 mm. The cavity may have a length of 18 mm to 30 mm. The cavity may have a length of 20 mm to 30 mm. The cavity may have a length of 24 mm to 28 mm.

[0219] The cavity may have a width of 30% or more of the width of the aerosol-generating article. The cavity may have a width of 40% or more of the width of the aerosol-generating article. The cavity may have a width of 50% or more of the width of the aerosol-generating article. The cavity may have a width of 60% or more of the width of the aerosol-generating article. The cavity may have a width of 70% or more of the width of the aerosol-generating article. The cavity may have a width of 80% or more of the width of the aerosol-generating article. The cavity may have a width of 90% or more of the width of the aerosol-generating article.

[0220] The cavity may have a width of 95% or less of the width of the aerosol-generating article. The cavity may have a width of 90% or less of the width of the aerosol-generating article. The cavity may have a width of 80% or less of the width of the aerosol-generating article. The cavity may have a width of 70% or less of the width of the aerosol-generating article. The cavity may have a width of 60% or less of the width of the aerosol-generating article. The cavity may have a width of 55% or less of the width of the aerosol-generating article.

[0221] The cavity may have a width of 30% to 95% of the width of the aerosol-generating article. The cavity may have a width of 40% to 95% of the width of the aerosol-generating article. The cavity may have a width of 50% to 90% of the width of the aerosol-generating article. The cavity may have a width of 50% to 95% of the width of the aerosol-generating article. The cavity may have a width of 60% to 90% of the width of the aerosol-generating article. The cavity may have a width of 70% to 90% of the width of the aerosol-generating article. The cavity may have a width of 80% to 90% of the width of the aerosol-generating article.

[0222] The cavity may have a width of 4.5 mm or more. The cavity may have a width of 5 mm or more. The cavity may have a width of 7 mm or more. The cavity may have a width of 9 mm or more. The cavity may have a width of 11 mm or more.

[0223] The cavity may have a width of 13 mm or less. The cavity may have a width of 13 mm or less. The cavity may have a width of 11 mm or less. The cavity may have a width of 9 mm or less. The cavity may have a width of 7 mm or less. The cavity may have a width of 5 millimeters or less.

[0224] The cavity may have a width of 4.5 mm to 13 mm. The cavity may have a width of 5 mm to 13 mm. The cavity may have a width of 7 mm to 10 mm. The cavity may have a width of 7.5 millimeters to 8.5 millimeters.

[0225] The cavity may have a length of 14 to 40 millimeters, a width of 4.5 to 13 millimeters, and a thickness of 0.5 to 4.5 millimeters.

[0226] Preferably, the cavity may have a length of 20 to 30 millimeters, a width of 7 to 10 millimeters, and a thickness of 2.5 to 4 millimeters.

[0227] Most preferably, the cavity may have a length of 26 mm, a width of 8 mm, and a thickness of 3.1 mm.

[0228] The cavity may have a volume of 30 mm³ or more. The cavity may have a volume of 100 mm³ or more. The cavity may have a volume of 200 mm³ or more. The cavity may have a volume of 300 mm³ or more. The cavity may have a volume of 400 mm³ or more. The cavity may have a volume of 500 mm³ or more. The cavity may have a volume of 600 mm³ or more. The cavity may have a volume of 700 mm³ or more. The cavity may have a volume of 800 mm³ or more. The cavity may have a volume of 900 mm³ or more. The cavity may have a volume of 1000 mm³ or more. The cavity may have a volume of 1500 mm³ or more. The cavity may have a volume of 2000 mm³ or more. The cavity may have a volume of 2500 mm³ or more. The cavity may have a volume of 3000 mm³ or more.

[0229] The cavity may have a volume of 3500 mm³ or less. The cavity may have a volume of 3000 mm³ or less. The cavity may have a volume of 2500 mm³ or less. The cavity may have a volume of 2000 mm³ or less. The cavity may have a volume of 1500 mm³ or less. The cavity may have a volume of 1000 mm³ or less. The cavity may have a volume of 900 mm³ or less. The cavity may have a volume of 800 mm³ or less. The cavity may have a volume of 700 mm³ or less. The cavity may have a volume of 600 mm³ or less. The cavity may have a volume of 500 mm³ or less. The cavity may have a volume of 400 mm³ or less. The cavity may have a volume of 300 mm³ or less.

[0230] The cavity may have a volume of 30 mm³ to 3000 mm³. The cavity may have a volume of 30 mm³ to 3000 mm³. The cavity may have a volume of 30 mm³ to 2500 mm³. The cavity may have a volume of 30 mm³ to 2350 mm³. The cavity may have a volume of 100 mm³ to 2000 mm³. The cavity may have a volume of 100 mm³ to 1500 mm³. The cavity may have a volume of 250 mm³ to 1150 mm³. The cavity may have a volume of 100 mm³ to 1000 mm³. The cavity may have a volume of 100 mm³ to 900 mm³. The cavity may have a volume of 200 mm³ to 800 mm³. Preferably, the cavity may have a volume of 300 mm³ to 700 mm³. The cavity may have a volume of 400 mm³ to 700 mm³. The cavity may have a volume of 500 mm³ to 700 mm³.

[0231] The cavity may have a volume of 1% or more of the external volume of the aerosol-generating article. The cavity may have a volume of 5% or more of the external volume of the aerosol-generating article. The cavity may have a volume of 1% or more of the external volume of the aerosol-generating article.

[0232] The cavity may have a volume of 90% or less of the external volume of the aerosol-generating article. The cavity may have a volume of 80% or less of the external volume of the aerosol-generating article. The cavity may have a volume of 70% or less of the external volume of the aerosol-generating article.

[0233] The cavity may have a volume of 1% to 90% of the external volume of the aerosol-generating article. The cavity may have a volume of 5% to 80% of the external volume of the aerosol-generating article. The cavity may have a volume of 10% to 70% of the external volume of the aerosol-generating article.

[0234] The common area can be practically empty.

[0235] One or more aerosol generating materials may include an aerosol generating material located within a cavity. The aerosol generating material located within the cavity may fill the cavity. Advantageously, providing an aerosol generating material that fills the cavity enables the aerosol generating material to provide mechanical support to a first planar outer surface and a second planar outer surface. Providing additional mechanical support to the first planar outer surface and the second planar outer surface can improve the rigidity of the aerosol generating article.

[0236] One or more aerosol generating materials may include an aerosol generating material located within a first cavity. The aerosol generating material located within the cavity may fill the first cavity.

[0237] An aerosol generating material located within the cavity, the first cavity, or the second cavity may comprise an aerosol generating material. The aerosol generating material may be any aerosol generating material described herein. For example, the aerosol generating material may be in the form of a crushed aerosol generating material.

[0238] The aerosol generating material may be in the form of a sheet of the aerosol generating material. The sheet of the aerosol generating material may be any sheet of the aerosol generating material described herein. For example, the sheet of the aerosol generating material may be a sheet of homogenized tobacco material.

[0239] A sheet of aerosol-generating material may extend to the entire length of the cavity, the first cavity, or the second cavity. A sheet of aerosol-generating material may extend to the entire width of the cavity, the first cavity, or the second cavity.

[0240] The sheet of aerosol generating material may be a corrugated sheet of aerosol generating material. That is, the sheet of aerosol generating material may be wavy, folded, otherwise compressed or shrunk substantially perpendicular to the transverse direction of the aerosol generating article.

[0241] The sheet of aerosol generating material may be a crimped sheet of aerosol generating material. The sheet of aerosol generating material may be a wavy sheet of aerosol generating material. The crimped sheet of aerosol generating material or the wavy sheet of aerosol generating material may include a plurality of parallel wavy folds. For example, the crimped sheet of aerosol generating material may include a plurality of substantially parallel peaks and valleys.

[0242] Multiple parallel ripples may be defined by a ripple contour, which is a sine wave, or a triangle, or a rectangle, or a trapezoid, or a donut, or a parabola. Multiple parallel ripples may be defined by a ripple wavelength and a ripple amplitude. The ripple wavelength may be 0.5 mm to 10 mm, for example, 1 mm to 10 mm, for example, 1.5 mm to 8 mm, for example, 2 mm to 6 mm, for example, 2.5 mm to 5 mm, for example, about 3 mm to 4 mm. The ripple amplitude may be approximately equal to the thickness of the cavity.

[0243] A plurality of parallel wavy folds may define or form a plurality of channels between the sheet of the aerosol generating material and one or more walls of the cavity, the first cavity, and the second cavity. The plurality of channels may be channels extending in a plurality of longitudinal directions. That is, the plurality of channels may extend in the longitudinal direction of the aerosol generating article. The plurality of channels may be channels extending in a plurality of lateral directions. That is, the plurality of channels may extend laterally of the aerosol generating article. The plurality of channels may define or form at least a portion of an airflow passage extending between the air inlet and the air outlet of the aerosol generating article.

[0244] An aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 150 mm³ or more. An aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 200 mm³ or more. An aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 250 mm³ or more. An aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 350 mm³ or more.

[0245] The aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 1000 mm³ or less. The aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 900 mm³ or less. The aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 800 mm³ or less. The aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 700 mm³ or less.

[0246] The aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 100 mm³ to 1000 mm³. The aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 200 mm³ to 1000 mm³. The aerosol generating material located within the cavity, the first cavity, or the second cavity may have a volume of 350 mm³ to 650 mm³.

[0247] At least one of the one or more aerosol generating materials may have a density of 0.05 g / cm³ or more. At least one of the one or more aerosol generating materials may have a density of 0.1 g / cm³ or more. At least one of the one or more aerosol generating materials may have a density of 0.2 g / cm³ or more. At least one of the one or more aerosol generating materials may have a density of 0.3 g / cm³ or more. At least one of the one or more aerosol generating materials may have a density of 0.4 g / cm³ or more.

[0248] At least one of the one or more aerosol generating materials may have a density of 0.9 g / cm³ or less. At least one of the one or more aerosol generating materials may have a density of 0.8 g / cm³ or less. At least one of the one or more aerosol generating materials may have a density of 0.7 g / cm³ or less. At least one of the one or more aerosol generating materials may have a density of 0.6 g / cm³ or less. At least one of the one or more aerosol generating materials may have a density of 0.5 g / cm³ or less. At least one of the one or more aerosol generating materials may have a density of 0.4 g / cm³ or less. At least one of the one or more aerosol generating materials may have a density of 0.3 g / cm³ or less.

[0249] At least one of the one or more aerosol generating materials may have a density of 0.05 g / cm³ to 0.9 g / cm³. At least one of the one or more aerosol generating materials may have a density of 0.05 g / cm³ to 0.9 g / cm³. At least one of the one or more aerosol generating materials may have a density of 0.1 g / cm³ to 0.8 g / cm³. At least one of the one or more aerosol generating materials may have a density of 0.2 g / cm³ to 0.7 g / cm³. At least one of the one or more aerosol generating materials may have a density of 0.2 g / cm³ to 0.6 g / cm³. At least one of the one or more aerosol generating materials may have a density of 0.2 g / cm³ to 0.5 g / cm³. At least one of the one or more aerosol generating materials may have a density of 0.2 g / cm³ to 0.4 g / cm³.

[0250] At least one of the one or more aerosol generating materials described above with respect to density may be an aerosol generating material layer, a first aerosol generating material layer, a second aerosol generating material layer, a cavity or an aerosol generating material located within the first cavity, or an aerosol generating material located together with the second cavity, or at least one of these. Preferably, at least one of the one or more aerosol generating materials mentioned above with respect to density may be an aerosol generating material located within the cavity or a first cavity, or an aerosol generating material located together with the second cavity, or at least one of these.

[0251] The aerosol generating material within the aerosol generating article typically has a high density to facilitate heat conduction through the aerosol generating material.

[0252] Advantageously, providing an aerosol generating material having a relatively low density of 0.9 g / cm³ or less to an aerosol generating article enables the aerosol generating article to contain a reduced mass of the aerosol generating article. A reduced mass of the aerosol generating material can make the aerosol generating article more convenient to handle and easier to manufacture.

[0253] Advantageously, providing a low-density aerosol generating material within a cavity of an aerosol generating article comprising a first planar outer surface, a second planar outer surface, and a frame located between the first planar outer surface and the second planar outer surface can allow for efficient heating of the aerosol generating material while still providing the advantages of the low-density aerosol generating material as described above.

[0254] At least one of the one or more aerosol generating materials may have a mass of 50 mg or more. At least one of the one or more aerosol generating materials may have a mass of 80 mg or more. At least one of the one or more aerosol generating materials may have a mass of 110 mg or more. At least one of the one or more aerosol generating materials may have a mass of 150 mg or more. At least one of the one or more aerosol generating materials may have a mass of 170 mg or more. At least one of the one or more aerosol generating materials may have a mass of 180 mg or more. At least one of the one or more aerosol generating materials may have a mass of 200 mg or more. At least one of the one or more aerosol generating materials may have a mass of 230 mg or more. At least one of the one or more aerosol generating materials may have a mass of 250 mg or more. At least one of the one or more aerosol generating materials may have a mass of 300 mg or more. At least one of the one or more aerosol generating materials may have a mass of 400 mg or more.

[0255] At least one of the one or more aerosol generating materials may have a mass of 500 mg or less. At least one of the one or more aerosol generating materials may have a mass of 400 mg or less. At least one of the one or more aerosol generating materials may have a mass of 300 mg or less. At least one of the one or more aerosol generating materials may have a mass of 250 mg or less. At least one of the one or more aerosol generating materials may have a mass of 230 mg or less. At least one of the one or more aerosol generating materials may have a mass of 200 mg or less. At least one of the one or more aerosol generating materials may have a mass of 180 mg or less. At least one of the one or more aerosol generating materials may have a mass of 170 mg or less. At least one of the one or more aerosol generating materials may have a mass of 150 mg or less. At least one of the one or more aerosol generating materials may have a mass of 110 mg or less. At least one of the one or more aerosol generating materials may have a mass of 80 mg or less. At least one of the one or more aerosol generating materials may have a mass of 50 mg or less.

[0256] At least one of the one or more aerosol generating materials may have a mass of 50 mg to 500 mg. At least one of the one or more aerosol generating materials may have a mass of 80 mg to 500 mg. At least one of the one or more aerosol generating materials may have a mass of 80 mg to 400 mg. At least one of the one or more aerosol generating materials may have a mass of 80 mg to 300 mg. At least one of the one or more aerosol generating materials may have a mass of 80 mg to 250 mg. At least one of the one or more aerosol generating materials may have a mass of 80 mg to 200 mg. At least one of the one or more aerosol generating materials may have a mass of 80 mg to 150 mg.

[0257] With respect to mass, at least one of the one or more aerosol generating materials described above may be an aerosol generating material layer, a first aerosol generating material layer, a second aerosol generating material layer, an aerosol generating material located in a cavity or a first cavity, or an aerosol generating material located together with a second cavity, or at least one of these. Preferably, with respect to mass, at least one of the one or more aerosol generating materials described above may be an aerosol generating material located in a cavity or a first cavity, or an aerosol generating material located together with a second cavity, or at least one of these.

[0258] Advantageously, providing an aerosol generating material of 500 mg or less to an aerosol generating article can reduce the amount of structural support that needs to be provided to the aerosol generating article.

[0259] Advantageously, providing an aerosol generating article having an aerosol generating material of 50 mg or more allows the aerosol generating material to provide some structural support to the aerosol generating article.

[0260] Advantageously, providing a low-mass aerosol generating material to an aerosol generating article can result in better heating efficiency because the mass of the aerosol generating material to be heated is relatively low. A relatively low-mass aerosol generating material is particularly advantageous during the first puff through the aerosol generating article, as the first puff can be achieved much faster than with an aerosol generating article having a high-mass aerosol generating material.

[0261] Advantageously, providing a low-mass aerosol generating material to an aerosol generating article can reduce the total moisture content of the aerosol generating material. Reducing the total moisture content of the aerosol generating material can reduce the temperature of the first puff.

[0262] The aerosol generating article may include an outer wrapper and an aerosol generating material as described herein, located within the cavity.

[0263] The aerosol generating article may include an outer wrapper, a frame, and an aerosol generating material as described herein, located within the cavity.

[0264] The aerosol generating article may include an outer wrapper and an aerosol generating substrate layer. The cavity may be empty, or an aerosol generating substrate as described herein may be located within the cavity.

[0265] The aerosol generating article may include an outer wrapper, a frame, and an aerosol generating substrate layer. The cavity may be empty, or an aerosol generating substrate as described herein may be located within the cavity.

[0266] The aerosol generating article may comprise an outer wrapper, a first cavity, a second cavity, and an aerosol generating substrate layer. The first cavity may be empty, or an aerosol generating substrate as described herein may be located within the first cavity. The second cavity may be empty, or an aerosol generating substrate as described herein may be located within the second cavity.

[0267] The aerosol generating article may include an outer wrapper, a frame, a first cavity, a second cavity, and an aerosol generating substrate layer. The first cavity may be empty, or an aerosol generating substrate as described herein may be located within the first cavity. The second cavity may be empty, or an aerosol generating substrate as described herein may be located within the second cavity.

[0268] The aerosol generating article may include an outer wrapper, a first aerosol generating substrate layer, and a second aerosol generating substrate layer. The cavity may be empty, or an aerosol generating substrate as described herein may be located within the cavity.

[0269] The aerosol generating article may include an outer wrapper, a frame, a first aerosol generating substrate layer, and a second aerosol generating substrate layer. The cavity may be empty, or an aerosol generating substrate as described herein may be located within the cavity.

[0270] The aerosol generating article may include an outer wrapper, a first aerosol generating substrate layer, a second aerosol generating substrate layer, a first cavity, and a second cavity. The first cavity may be empty, or an aerosol generating substrate as described herein may be located within the first cavity. The second cavity may be empty, or an aerosol generating substrate as described herein may be located within the second cavity.

[0271] The aerosol generating article may include an outer wrapper, a frame, a first aerosol generating substrate layer, a second aerosol generating substrate layer, a first cavity, and a second cavity. The first cavity may be empty, or an aerosol generating substrate as described herein may be located within the first cavity. The second cavity may be empty, or an aerosol generating substrate as described herein may be located within the second cavity.

[0272] The aerosol generating article may include a first planar outer layer, a second planar outer layer, and an aerosol generating substrate layer. The cavity may be empty, or an aerosol generating substrate as described herein may be located within the cavity.

[0273] The aerosol generating article may include a first planar outer layer, a second planar outer layer, a frame, and an aerosol generating substrate layer. The cavity may be empty, or an aerosol generating substrate as described herein may be located within the cavity.

[0274] The aerosol generating article may include a first planar outer layer, a second planar outer layer, an aerosol generating substrate layer, a first cavity, and a second cavity. The first cavity may be empty, or an aerosol generating substrate as described herein may be located within the first cavity. The second cavity may be empty, or an aerosol generating substrate as described herein may be located within the second cavity.

[0275] The aerosol generating article may include a first planar outer layer, a second planar outer layer, a frame, an aerosol generating substrate layer, a first cavity, and a second cavity. The first cavity may be empty, or an aerosol generating substrate as described herein may be located within the first cavity. The second cavity may be empty, or an aerosol generating substrate as described herein may be located within the second cavity.

[0276] The aerosol generating article may include a first planar outer layer, a second planar outer layer, a first aerosol generating substrate layer, and a second aerosol generating substrate layer. The cavity may be empty, or an aerosol generating substrate as described herein may be located within the cavity.

[0277] The aerosol generating article may include a first planar outer layer, a second planar outer layer, a frame, a first aerosol generating substrate layer, and a second aerosol generating substrate layer. The cavity may be empty, or an aerosol generating substrate as described herein may be located within the cavity.

[0278] The aerosol generating article may include a first planar outer layer, a second planar outer layer, a first aerosol generating substrate layer, a second aerosol generating substrate layer, a first cavity, and a second cavity. The first cavity may be empty, or an aerosol generating substrate as described herein may be located within the first cavity. The second cavity may be empty, or an aerosol generating substrate as described herein may be located within the second cavity.

[0279] The aerosol generating article may include a first planar outer layer, a second planar outer layer, a frame, a first aerosol generating substrate layer, a second aerosol generating substrate layer, a first cavity, and a second cavity. The first cavity may be empty, or an aerosol generating substrate as described herein may be located within the first cavity. The second cavity may be empty, or an aerosol generating substrate as described herein may be located within the second cavity.

[0280] The aerosol generating material may include one or more organic materials such as tobacco, mint, tea, and cloves. The aerosol generating material may include one or more of herb leaves, tobacco leaves, tobacco rib pieces, reconstituted tobacco, homogenized tobacco such as cast leaves, extruded tobacco, puffed tobacco, aerosol generating films, and gel compositions.

[0281] The aerosol generating material may be in the form of a shredded aerosol generating material. The shredded aerosol generating material may include: one or more strips and strands of the aerosol generating material, such as strips and strands of tobacco or homogenized tobacco material. The shredded aerosol generating material may be in the form of shredded sheets of homogenized tobacco material.

[0282] The aerosol-generating material may be tobacco sticks. The aerosol-generating material may be tobacco sticks. Tobacco sticks may include one or more of bright tobacco, dark tobacco, flavored tobacco, and filler tobacco. Examples of bright tobacco are Brazilian yellow tobacco, Indian yellow tobacco, Chinese yellow tobacco, American yellow tobacco such as Virginia tobacco, and Tanzanian yellow tobacco. Examples of flavored tobacco include Oriental Turkish tobacco, Greek Oriental tobacco, and semi-Oriental tobacco, as well as American Burley smoked tobacco such as Perique and Rustica. Examples of dark tobacco are dark-cured Brazilian Galpao, Burley Malawi or other African Burley, and sun-cured or air-cured Indonesian Kasturi. As used herein, the term “cut grass” is used to describe a blend of crushed plant material, such as tobacco plant material or homogenized plant material, comprising one or more of leaf blades, processed stems and ribs, in particular.

[0283] A cut candle suitable for use with the present invention may be similar to a cut candle used in conventional smoking articles. The cutting width of the cut candle may preferably be 0.3 mm to 2.0 mm, or 0.5 mm to 1.2 mm, or 0.6 mm to 0.9 mm. Preferably, the strand has a length of about 10 mm to about 40 mm.

[0284] Preferably, the seeds are immersed in an aerosol-forming agent. Immersion of the seeds can be performed by spraying or by other suitable application methods. Preferably, the aerosol-forming agent in the seeds comprises one or more of glycerol and propylene glycol. The aerosol-forming agent may consist of glycerol or propylene glycol or a combination of glycerol and propylene glycol.

[0285] The aerosol generating material may include homogenized plant material, preferably homogenized tobacco material.

[0286] As used herein, the term “homogenized plant material” encompasses any plant material formed by the aggregation of plant particles. For example, a sheet or web of homogenized tobacco material for the aerosol generating substrate of the present invention may be formed by aggregating particles of tobacco material obtained by pulverizing, milling, or grinding one or more of plant material and optionally tobacco leaf blades and tobacco leaf stalks. Homogenized plant material may be produced by casting, extrusion, papermaking processes, or any other suitable process known in the art.

[0287] Homogenized plant material may be in the form of one or more sheets.

[0288] The homogenized plant material may be in the form of multiple pellets or granules.

[0289] Homogenized plant material may be in the form of multiple strands, strips, or shreds. As used herein, the term “strand” describes an elongated element of material having a length substantially greater than its width and thickness.

[0290] The aerosol generating material may be in the form of a sheet of the aerosol generating material. As used herein, the term “sheet” describes a laminated element in which the width and length are substantially greater than the thickness. The sheet of the aerosol generating material may be a sheet of plant material. The sheet of the aerosol generating material may be a sheet of tobacco material. The sheet of the aerosol generating material may be a sheet of homogenized tobacco material, such as a cast leaf sheet.

[0291] The sheet of the aerosol generating material may have a basis weight of 100 g / m2 to 600 g / m2. The sheet of the aerosol generating material may have a basis weight of 100 g / m2 to 300 g / m2.

[0292] A sheet of aerosol-generating material may have a density of 0.3 g / cm³ or more. A sheet of aerosol-generating material may have a density of 0.4 g / cm³ or more. A sheet of aerosol-generating material may have a density of 0.5 g / cm³ or more. A sheet of aerosol-generating material may have a density of 0.6 g / cm³ or more. A sheet of aerosol-generating material may have a density of 0.7 g / cm³ or more. A sheet of aerosol-generating material may have a density of 0.8 g / cm³ or less.

[0293] A sheet of aerosol-generating material may have a density of 1.0 g / cm³ or less. A sheet of aerosol-generating material may have a density of 0.9 g / cm³ or less. A sheet of aerosol-generating material may have a density of 0.8 g / cm³ or less. A sheet of aerosol-generating material may have a density of 0.7 g / cm³ or less. A sheet of aerosol-generating material may have a density of 0.6 g / cm³ or less. A sheet of aerosol-generating material may have a density of 0.5 g / cm³ or less. A sheet of aerosol-generating material may have a density of 0.4 g / cm³ or less.

[0294] A sheet of aerosol-generating material may have a density of 0.3 g / cm³ to 1.3 g / cm³. A sheet of aerosol-generating material may have a density of 0.3 g / cm³ to 1.0 g / cm³. A sheet of aerosol-generating material may have a density of 0.4 g / cm³ to 1.0 g / cm³. A sheet of aerosol-generating material may have a density of 0.4 g / cm³ to 0.9 g / cm³. A sheet of aerosol-generating material may have a density of 0.5 g / cm³ to 0.9 g / cm³.

[0295] A sheet of aerosol generating material may contain 2.5% to 95% by weight of plant particles based on dry weight. A sheet of aerosol generating material may contain 5% to 90% by weight of plant particles based on dry weight. A sheet of aerosol generating material may contain 10% to 80% by weight of plant particles based on dry weight. A sheet of aerosol generating material may contain 15% to 70% by weight of plant particles based on dry weight. A sheet of aerosol generating material may contain 20% to 60% by weight of plant particles based on dry weight. A sheet of aerosol generating material may contain 30% to 50% by weight of plant particles based on dry weight.

[0296] The sheet of the aerosol generating material may be a sheet of homogenized tobacco material containing tobacco particles. The sheet of homogenized tobacco material may have a tobacco content of at least about 40% by weight based on dry weight. The sheet of homogenized tobacco material may have a tobacco content of at least about 50% by weight based on dry weight. The sheet of homogenized tobacco material may have a tobacco content of at least about 70% by weight based on dry weight. The sheet of homogenized tobacco material may have a tobacco content of at least about 90% by weight based on dry weight.

[0297] As used herein, the term “tobacco particle” may describe particles of any plant member of the genus Nicotiana. The term “tobacco particle” includes crushed or powdered tobacco leaves, crushed or powdered tobacco stalks, tobacco powder, tobacco fines, and other particulate tobacco by-products formed during the processing, handling, and delivery of tobacco. In a preferred embodiment, the tobacco particle is substantially entirely derived from the tobacco leaves. In contrast, isolated nicotine and nicotine salts are compounds derived from tobacco, but for the purposes of this disclosure, they are not considered tobacco particles and are not included in the percentage of particulate plant material.

[0298] Tobacco particles may be produced from one or more tobacco plant varieties. Any type of tobacco may be used in the blend. Examples of tobacco types that may be used include, but are not limited to, sun-dry tobacco, yellow tobacco, Burleigh tobacco, Maryland tobacco, Oriental tobacco, Virginia tobacco, and other specialty tobaccos.

[0299] Fire drying is a method of drying tobacco, used particularly for Virginia tobacco. During the fire drying process, heated air is circulated through densely packed tobacco. During the first stage, the tobacco leaves turn yellow and wilt. During the second stage, the leaf shoots are completely dried. During the third stage, the leaf stalks are completely dried.

[0300] Burleigh tobacco plays an important role in many tobacco blends. Burleigh tobacco possesses a unique flavor and aroma, and also has the ability to absorb a large amount of casing.

[0301] Oriental is a type of tobacco characterized by small leaves and high aromatic quality. However, Oriental tobacco has a milder flavor profile than, for example, Burleigh. Therefore, Oriental tobacco is generally used in a relatively small proportion of tobacco blends.

[0302] Kasturi, Madura, and Zatim are subtypes of sun-dried tobacco available for use. Preferably, Kasturi tobacco and yellow tobacco can be used in a blend to produce tobacco particles. Thus, the tobacco particles in the particulate plant material may contain a blend of Kasturi tobacco and yellow tobacco.

[0303] Tobacco particles may have a nicotine content of at least about 2.5% by weight based on dry weight. More preferably, tobacco particles may have a nicotine content of at least about 3% by weight based on dry weight, more preferably at least about 3.2% by weight, even more preferably at least about 3.5% by weight, and most preferably at least about 4% by weight.

[0304] The aerosol-generating material may comprise one or more cannabinoid compounds, such as one or more of tetrahydrocannabinol (THC), tetrahydrocannabinol (THCA), cannabidiol (CBD), cannabidiol acid (CBDA), cannabinol (CBN), cannabigerol (CBG), cannabigerol monomethyl ether (CBGM), cannavivarin (CBV), cannavivarin (CBDV), tetrahydrocannavivarin (THCV), cannabicromin (CBC), cannabicyclol (CBL), cannabichromevarin (CBCV), cannabigerovarin (CBGV), cannabielsoin (CBE), and cannabicitran (CBT). The cannabinoid compound may preferably be CBD or THC. The cannabinoid compound may particularly preferably be CBD.

[0305] The aerosol generating material may comprise one or more aerosol-forming agents. Suitable aerosol-forming agents are known in the art and include, but are not limited to, polyhydric alcohols such as propylene glycol, polyethylene glycol, triethylene glycol, 1,3-butanediol, and glycerin; esters of polyhydric alcohols such as glycerol mono-, di-, or triacetate; and aliphatic esters of mono-, di-, or polycarboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate. It may be particularly preferable that the aerosol-forming agent be one or both of glycerin and propylene glycol, or comprise them. The aerosol-forming agent may consist of glycerin or propylene glycol, or a combination of glycerin and propylene glycol.

[0306] The aerosol generating material may have an aerosol forming agent content of 1, 2, 5, 10, or 15 weight percent or more based on dry weight. The aerosol generating material may have an aerosol forming agent content of 15 weight percent or more based on dry weight, for example, exceeding 20 weight percent based on dry weight, or exceeding 25 weight percent based on dry weight, or exceeding 30 weight percent based on dry weight, or exceeding 40 weight percent based on dry weight, or exceeding 50 weight percent based on dry weight.

[0307] The aerosol generating material may have an aerosol forming agent content of 30% by weight or less, 25% by weight or less, or 20% by weight or less based on dry weight. That is, the aerosol generating material may have an aerosol forming agent content of 30% by weight or less, 25% by weight or less based on dry weight, or 20% by weight or less based on dry weight.

[0308] The aerosol generating material may have an aerosol forming agent content of 1% to 30% by weight based on dry weight, 1% to 25% by weight based on dry weight, or 1% to 20% by weight based on dry weight.

[0309] The aerosol generating material may have an aerosol forming agent content of 5% to 30% by weight based on dry weight, 5% to 25% by weight based on dry weight, or 5% to 20% by weight based on dry weight.

[0310] The aerosol generating material may have an aerosol forming agent content of 10% to 30% by weight based on dry weight, 10% to 25% by weight based on dry weight, or 10% to 20% by weight based on dry weight.

[0311] The aerosol generating material may have an aerosol forming agent content of 15% to 30% by weight based on dry weight, 15% to 25% by weight based on dry weight, or 15% to 20% by weight based on dry weight.

[0312] The aerosol generating material may have an aerosol forming agent content of at least 50% by weight, at least 60% by weight, or at least 70% by weight based on dry weight.

[0313] The aerosol generating material may have an aerosol forming agent content of 85% by weight or less based on dry weight, 80% by weight or less based on dry weight, or 75% by weight or less based on dry weight.

[0314] The aerosol generating material may contain an aerosol forming agent content of 50% to 85% by weight based on dry weight, 50% to 80% by weight based on dry weight, or 50% to 75% by weight based on dry weight.

[0315] The aerosol generating material may contain an aerosol forming agent content of 60% to 85% by weight based on dry weight, 60% to 80% by weight based on dry weight, or 60% to 75% by weight based on dry weight.

[0316] The aerosol generating material may contain an aerosol forming agent content of 70% to 85% by weight based on dry weight, 70% to 80% by weight based on dry weight, or 70% to 75% by weight based on dry weight.

[0317] The aerosol generating material may include hydroxypropylmethyl cellulose.

[0318] Advantageously, incorporating hydroxypropylmethyl cellulose into an aerosol generating material can help improve the manufacturing process of the aerosol generating material. For example, hydroxypropylmethyl cellulose can reduce the overall viscosity of the slurry mixed when manufacturing the aerosol generating material. The low-viscosity slurry can flow more easily than conventional slurries, and the low-viscosity slurry is easier to mix, deliver, and handle during the manufacturing process.

[0319] The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 0.5% by weight or more. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 1% by weight or more. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 5% by weight or more. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 10% by weight or more. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 15% by weight or more. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 20% by weight or more.

[0320] The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 50% by weight or less. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 45% by weight or less. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 40% by weight or less. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 35% by weight or less. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 30% by weight or less. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 25% by weight or less. The aerosol generating material may contain a hydroxypropylmethyl cellulose content of 20% by weight or less.

[0321] The aerosol generating material may contain 0.5% to 50% by weight of hydroxypropylmethyl cellulose.

[0322] The aerosol generating material may include one or more cellulose-based reinforcing agents. Advantageously, including cellulose-based reinforcing agents in the aerosol generating material can increase the tensile strength of the aerosol generating material. An aerosol generating material having higher tensile strength may be less likely to deteriorate or break, for example, during transport or during the manufacturing process.

[0323] The aerosol generating material may have a cellulose-based reinforcing agent content of 0.5% by weight or more. The aerosol generating material may have a cellulose-based reinforcing agent content of 1% by weight or more. The aerosol generating material may have a cellulose-based reinforcing agent content of 0.5% by weight or more. The aerosol generating material may have a cellulose-based reinforcing agent content of 5% by weight or more. The aerosol generating material may have a cellulose-based reinforcing agent content of 10% by weight or more. The aerosol generating material may have a cellulose-based reinforcing agent content of 15% by weight or more. The aerosol generating material may have a cellulose-based reinforcing agent content of 20% by weight or more.

[0324] The aerosol generating material may have a cellulose-based reinforcing agent content of 50% by weight or less. The aerosol generating material may have a cellulose-based reinforcing agent content of 45% by weight or less. The aerosol generating material may have a cellulose-based reinforcing agent content of 40% by weight or less. The aerosol generating material may have a cellulose-based reinforcing agent content of 35% by weight or less. The aerosol generating material may have a cellulose-based reinforcing agent content of 30% by weight or less. The aerosol generating material may have a cellulose-based reinforcing agent content of 25% by weight or less.

[0325] The aerosol generating material may have a cellulose-based reinforcing agent content of 0.5% to 50% by weight. The aerosol generating material may have a cellulose-based reinforcing agent content of 0.5% to 40% by weight.

[0326] One or more cellulose-based reinforcing agents may include cellulose fibers. Advantageously, the inventors have discovered that cellulose fibers can be cellulose-based reinforcing agents that are particularly effective in increasing the tensile strength of aerosol-generating materials.

[0327] The aerosol generating material may have a cellulose fiber content of 0.5% by weight or more. The aerosol generating material may have a cellulose fiber content of 1% by weight or more. The aerosol generating material may have a cellulose fiber content of 5% by weight or more. The aerosol generating material may have a cellulose fiber content of 10% by weight or more. The aerosol generating material may have a cellulose fiber content of 15% by weight or more. The aerosol generating material may have a cellulose fiber content of 20% by weight or more.

[0328] The aerosol generating material may have a cellulose fiber content of 50% by weight or less. The aerosol generating material may have a cellulose fiber content of 45% by weight or less. The aerosol generating material may have a cellulose fiber content of 40% by weight or less. The aerosol generating material may have a cellulose fiber content of 35% by weight or less. The aerosol generating material may have a cellulose fiber content of 30% by weight or less. The aerosol generating material may have a cellulose fiber content of 25% by weight or less.

[0329] The aerosol generating material may have a cellulose fiber content of 0.5% to 50% by weight. The aerosol generating material may have a cellulose fiber content of 0.5% to 40% by weight.

[0330] One or more cellulose-based reinforcing agents may include microcrystalline cellulose. Advantageously, the inventors have discovered that microcrystalline cellulose can be a cellulose-based reinforcing agent that is particularly effective in increasing the tensile strength of aerosol-generating materials.

[0331] The aerosol generating material may have a microcrystalline cellulose content of 0.5% by weight or more. The aerosol generating material may have a microcrystalline cellulose content of 1% by weight or more. The aerosol generating material may have a microcrystalline cellulose content of 5% by weight or more. The aerosol generating material may have a microcrystalline cellulose content of 10% by weight or more. The aerosol generating material may have a microcrystalline cellulose content of 15% by weight or more. The aerosol generating material may have a microcrystalline cellulose content of 20% by weight or more.

[0332] The aerosol generating material may have a microcrystalline cellulose content of 50% by weight or less. The aerosol generating material may have a microcrystalline cellulose content of 45% by weight or less. The aerosol generating material may have a microcrystalline cellulose content of 40% by weight or less. The aerosol generating material may have a microcrystalline cellulose content of 35% by weight or less. The aerosol generating material may have a microcrystalline cellulose content of 30% by weight or less. The aerosol generating material may have a microcrystalline cellulose content of 25% by weight or less.

[0333] The aerosol generating material may have a microcrystalline cellulose content of 0.5% to 50% by weight. The aerosol generating material may have a microcrystalline cellulose content of 0.5% to 40% by weight.

[0334] One or more cellulose-based reinforcing agents may comprise cellulose powder. Advantageously, the inventors have discovered that cellulose powder may be a cellulose-based reinforcing agent that is particularly effective in increasing the tensile strength of aerosol-generating materials.

[0335] The aerosol generating material may have a cellulose powder content of 0.5 weight% or more. The aerosol generating material may have a cellulose powder content of 1 weight% or more. The aerosol generating material may have a cellulose powder content of 0.5 weight% or more. The aerosol generating material may have a cellulose powder content of 5 weight% or more. The aerosol generating material may have a cellulose powder content of 10 weight% or more. The aerosol generating material may have a cellulose powder content of 15 weight% or more. The aerosol generating material may have a cellulose powder content of 20 weight% or more.

[0336] The aerosol generating material may have a cellulose powder content of 50% by weight or less. The aerosol generating material may have a cellulose powder content of 45% by weight or less. The aerosol generating material may have a cellulose powder content of 40% by weight or less. The aerosol generating material may have a cellulose powder content of 35% by weight or less. The aerosol generating material may have a cellulose powder content of 30% by weight or less. The aerosol generating material may have a cellulose powder content of 25% by weight or less.

[0337] The aerosol generating material may have a cellulose powder content of 0.5% to 50% by weight. The aerosol generating material may have a cellulose powder content of 0.5% to 40% by weight.

[0338] The aerosol generating material may include carboxymethyl cellulose.

[0339] Advantageously, the inventors have discovered that using carboxymethyl cellulose can help reduce crust formation of aerosol-generating materials when used in aerosol-generating articles.

[0340] Carboxymethyl cellulose may include sodium carboxymethyl cellulose. Advantageously, the inventors have discovered that sodium carboxymethyl cellulose is a carboxymethyl cellulose that can be particularly effective in preventing the crust formation problem mentioned above.

[0341] The aerosol generating material may have a carboxymethyl cellulose content of 0.5% by weight or more. The aerosol generating material may have a carboxymethyl cellulose content of 1% by weight or more. The aerosol generating material may have a carboxymethyl cellulose content of 5% by weight or more. The aerosol generating material may have a carboxymethyl cellulose content of 10% by weight or more.

[0342] The aerosol generating material may have a carboxymethyl cellulose content of 20% by weight or less. The aerosol generating material may have a carboxymethyl cellulose content of 15% by weight or less. The aerosol generating material may have a carboxymethyl cellulose content of 10% by weight or less. The aerosol generating material may have a carboxymethyl cellulose content of 8% by weight or less. The aerosol generating material may have a carboxymethyl cellulose content of 5% by weight or less.

[0343] The aerosol generating material may have a carboxymethyl cellulose content of 0.5% to 20% by weight.

[0344] The aerosol generating material may contain nicotine. The aerosol generating material may contain natural nicotine, synthetic nicotine, or a combination of natural nicotine and synthetic nicotine.

[0345] The aerosol generating material may contain at least 0.5% by weight of nicotine, at least 1% by weight of nicotine, at least 1.5% by weight of nicotine, or at least 2% by weight of nicotine. That is, the aerosol generating material may have a nicotine content of at least 0.5% by weight, at least 1% by weight, at least 1.5% by weight, or at least 2% by weight.

[0346] The aerosol generating material may include one or more flavoring agents. One or more flavoring agents may include one or more essential oils such as eugenol, peppermint oil, and spearmint oil; one or both of menthol and eugenol; one or both of anethole and linalool; and one or more herbal materials. Suitable herbal materials include, but are not limited to, mints such as peppermint and spearmint, lemon balm, basil, cinnamon, lemon basil, chives, coriander, lavender, sage, tea, thyme, and caraway, and other herbal materials derived from herb leaves or herbal plants. One or more flavoring agents may include tobacco materials.

[0347] The aerosol generating material may have a moisture content of about 5 to 25%, preferably about 7 to 15%, in the final product state. For example, the aerosol generating material may be a homogenized tobacco material having a moisture content of about 5 to 25%, preferably about 7 to 15%, in the final product state.

[0348] The aerosol generating material may include cellulose fibers. For example, the aerosol generating material may include about 1 to 15% cellulose fibers, preferably about 3 to 7% cellulose fibers. Preferably, the cellulose fibers may have a length of about 10 to 250 µm, preferably about 10 to 120 µm.

[0349] The aerosol generating material may include organic fibers, such as non-tobacco fibers, or tobacco fibers. For example, the aerosol generating material may include about 5 to 20%, preferably about 7 to 15%, of tobacco fibers. The tobacco fibers are preferably derived from stems and / or stalks graded into fibers with a length of about 10 to 350 µm, preferably about 10 to 180 µm. The aerosol generating material may include about 10 to 30%, preferably about 15 to 25%, of non-tobacco organic fibers. For example, the organic fibers may be derived from cellulose, cotton, wood, or tea plant varieties as by-products and reprocessed waste of the tea industry. The organic fibers are preferably about 10 to 400 µm, preferably about 10 to 200 µm in length.

[0350] The aerosol generating material may include a binder. For example, the aerosol generating material may include about 1 to 10%, preferably about 1 to 5%, of a binder such as either a common gum or pectin used in the food and beverage (F&B) industry. Preferred binders may be natural pectins such as fruit, e.g., citrus fruit, or tobacco pectin; starches such as guar gum, land locust bean gum, e.g., their hydroxyethyl and / or hydroxypropyl; modified or derived starch; alginate; methyl, ethyl, ethylhydroxymethyl and carboxymethyl, cellulose; dextran; and xanthan gum. A preferred binder is guar. The binder may be polyvinyl alcohol (PVOH).

[0351] The aerosol generating material may contain one or more plant components. For example, the aerosol generating material may contain about 15 to 55%, preferably about 20 to 35%, of plant components, such as cloves, echinacea species, fennel, ginger, hawthorn berries, elderberries, monarda, mullein leaves, nettle, plantain, turmeric, yarrow, and compounds thereof.

[0352] The aerosol generating material may include organic plant extracts. For example, the aerosol generating material may include any of the aforementioned plant components in an amount of about 1 to 15%, preferably about 2 to 7%, as well as menthol (dl-menthol, C10H20O, 2-isopropyl-5-methylcyclohexanol) obtained from Charophyllum macrosperm, Mesosphaerum cidifolium, or other related plant varieties, and p-mentan-3-ol as any secondary alcohol as a diastereomer of 5-methyl-2-(propan-2-yl)cyclohexan-1-ol.

[0353] The aerosol generating material may include vegetable essential oils, for example, about 0.5 to 5%, preferably about 1 to 3%, of vegetable essential oils, for example, vegetable essential oils, such as palm, coconut, and wood-based essential oils.

[0354] The aerosol generating material may include particles of functional materials, for example, particles of carbon, graphite, activated carbon, or expanded graphite. These materials can, for example, increase the thermal conductivity of the aerosol forming material and improve the efficiency of aerosol generation.

[0355] The aerosol generating material may be in the form of an aerosol generating film comprising a cellulose-based film forming agent, nicotine, and an aerosol forming agent. The aerosol generating film may further comprise a cellulose-based reinforcing agent. The aerosol generating film further comprises water, preferably 30% by weight or less of water.

[0356] As used herein, the term “film” is used to describe a solid laminar element having a thickness smaller than its width or length. The film may be self-supporting.

[0357] In the context of the present disclosure, the term “cellulose-based film-forming agent” is used to describe a cellulose polymer capable of forming a continuous film, either by itself or in the presence of an auxiliary thickener. Preferably, the cellulose-based film-forming agent is selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), hydroxyethyl methylcellulose (HEMC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), and combinations thereof. In a particularly preferred embodiment, the cellulose-based film-forming agent is HPMC.

[0358] Suitable aerosol generating films are described in WO-A-2020 / 207733 and WO-A-2022 / 074157.

[0359] Preferably, the aerosol generating film comprises 0.5% to 10% by weight of nicotine, or 1% to 8% by weight of nicotine, or 2% to 6% by weight of nicotine based on dry weight.

[0360] The aerosol generating film can be an aerosol generating film that is substantially free of tobacco.

[0361] The aerosol generating material may comprise a gel composition comprising nicotine, at least one gelling agent, and an aerosol forming agent. The gel composition is preferably substantially tobacco-free.

[0362] The preferred weight range for nicotine in the gel composition is the same as that defined above in relation to the aerosol generating film.

[0363] Suitable gel compositions are described in WO-A-2021 / 170642.

[0364] The gel composition comprises, based on dry weight, preferably at least 50% by weight of an aerosol-forming agent, more preferably at least 60% by weight of an aerosol-forming agent, and more preferably at least 70% by weight of an aerosol-forming agent. The gel composition may comprise up to 80% by weight of an aerosol-forming agent. The aerosol-forming agent in the gel composition is preferably glycerol.

[0365] An aerosol generating article may include an air inlet. An aerosol generating article may include one or more air inlets. An aerosol generating article may include multiple air inlets. An aerosol generating article may include an air outlet. An aerosol generating article may include one or more air outlets. An aerosol generating article may include multiple air outlets.

[0366] An air inlet may be defined by the front wall of the aerosol-generating article. An air inlet may be defined by a frame and may extend through the frame. An air inlet may be defined by the periphery wall of the frame. An air inlet may extend through the periphery wall of the frame. An air outlet may be defined by the rear wall of the aerosol-generating article. An air outlet may be defined by a frame and may extend through the frame. An air outlet may be defined by the periphery wall of the frame. An air outlet may extend through the periphery wall of the frame.

[0367] An air inlet may be defined by the longitudinal end wall of the frame. The air inlet may extend through the longitudinal end wall of the frame. An air outlet may be defined by the longitudinal end wall of the frame. The air outlet may extend through the longitudinal end wall of the frame. The air inlet and air outlet may be defined by opposing longitudinal end walls of the frame. The air inlet and air outlet may extend through opposing longitudinal end walls of the frame.

[0368] The air inlet may have a round cross-section, a circular cross-section, an oval cross-section, a square cross-section, or a rectangular cross-section. The air outlet may have a round cross-section, a circular cross-section, an oval cross-section, a square cross-section, or a rectangular cross-section.

[0369] An air inlet may be defined by or through a first frame layer, a second frame layer, or a third frame layer. An air inlet may be defined by or through a first frame layer and a second frame layer. An air inlet may be defined by or through a second frame layer and a third frame layer. An air inlet may be defined by or through a first frame layer, a second frame layer, and a third frame layer.

[0370] An air inlet may be defined by or extend through the longitudinal end wall of the first frame layer, the second frame layer, or the third frame layer. An air inlet may be defined by or extend through the longitudinal end wall of the first frame layer and the second frame layer. An air inlet may be defined by or extend through the longitudinal end wall of the first frame layer and the third frame layer. An air inlet may be defined by or extend through the longitudinal end wall of the first frame layer, the second frame layer, and the third frame layer.

[0371] An air outlet may be defined by or through a first frame layer, a second frame layer, or a third frame layer. An air outlet may be defined by or through a first frame layer and a second frame layer. An air outlet may be defined by or through a second frame layer and a third frame layer. An air outlet may be defined by or through a first frame layer, a second frame layer, and a third frame layer.

[0372] An air outlet may be defined by or extend through the longitudinal end wall of the first frame layer, the second frame layer, or the third frame layer. An air outlet may be defined by or extend through the longitudinal end wall of the first frame layer and the second frame layer. An air outlet may be defined by or extend through the longitudinal end wall of the first frame layer and the third frame layer. An air outlet may be defined by or extend through the longitudinal end wall of the first frame layer, the second frame layer, and the third frame layer.

[0373] An air inlet may be defined by an upper outer wall and may extend through the upper outer wall. An air inlet may be defined by a first planar outer surface and may extend through it. An air inlet may be defined by an outer wrapper and may extend through it. An air inlet may be defined by an outer wrapper and an aerosol generating substrate layer and may extend through it. An air inlet may be defined by an outer wrapper and a first aerosol generating substrate layer and may extend through it. An air inlet may be defined by a first planar outer layer and an aerosol generating substrate layer and may extend through it. An air inlet may be defined by a first planar outer layer and a first aerosol generating substrate layer and may extend through it.

[0374] The air inlet can be located in the center with respect to the length of the upper outer wall. The air inlet can be located in the center with respect to the width of the upper outer wall. The air inlet can be located in the center with respect to both the length and the width of the upper outer wall.

[0375] The air inlet may be located off-center with respect to the length of the upper outer wall. The air inlet may be located off-center with respect to the width of the upper outer wall. The air inlet may be located off-center with respect to both the length and width of the upper outer wall.

[0376] The air inlet may be located at the center with respect to the length of the first planar outer surface. The air inlet may be located at the center with respect to the width of the first planar outer surface. The air inlet may be located at the center with respect to both the length and the width of the first planar outer surface.

[0377] An air inlet may be located off-center with respect to the length of the first planar outer surface. An air inlet may be located off-center with respect to the width of the first planar outer surface. An air inlet may be located off-center with respect to both the length and width of the first planar outer surface. Advantageously, positioning an air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0378] The air inlet may be located in the center with respect to the length of the first planar outer layer. The air inlet may be located in the center with respect to the width of the first planar outer layer. The air inlet may be located in the center with respect to both the length and the width of the first planar outer layer.

[0379] An air inlet may be located off-center with respect to the length of the first planar outer layer. An air inlet may be located off-center with respect to the width of the first planar outer layer. An air inlet may be located off-center with respect to both the length and width of the first planar outer layer. Advantageously, positioning an air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0380] The air inlet may be located at the center with respect to the length of the first aerosol generating substrate layer. The air inlet may be located at the center with respect to the width of the first aerosol generating substrate layer. The air inlet may be located at the center with respect to both the length and the width of the first aerosol generating substrate layer.

[0381] An air inlet may be located at a position off-center with respect to the length of the first aerosol generating substrate layer. An air inlet may be located at a position off-center with respect to the width of the first aerosol generating substrate layer. An air inlet may be located at a position off-center with respect to both the length and the width of the first aerosol generating substrate layer. Advantageously, positioning an air outlet at a position off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol generating article.

[0382] An air inlet may be defined by a lower outer wall and may extend through the lower outer wall. An air inlet may be defined by a second planar outer surface and may extend through it. An air inlet may be defined by an outer wrapper and a second aerosol generating substrate layer and may extend through it. An air inlet may be defined by a second planar outer layer and an aerosol generating substrate layer and may extend through them. An air inlet may be defined by a second planar outer layer and a second aerosol generating substrate layer and may extend through them.

[0383] The air inlet can be located in the center with respect to the length of the lower outer wall. The air inlet can be located in the center with respect to the width of the lower outer wall. The air inlet can be located in the center with respect to both the length and the width of the lower outer wall.

[0384] The air inlet may be located off-center with respect to the length of the lower outer wall. The air inlet may be located off-center with respect to the width of the lower outer wall. The air inlet may be located off-center with respect to both the length and width of the lower outer wall. Advantageously, positioning the air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0385] The air inlet may be located in the center with respect to the length of the second planar outer surface. The air inlet may be located in the center with respect to the width of the second planar outer surface. The air inlet may be located in the center with respect to both the length and the width of the second planar outer surface.

[0386] An air inlet may be located off-center with respect to the length of the second planar outer surface. An air inlet may be located off-center with respect to the width of the second planar outer surface. An air inlet may be located off-center with respect to both the length and width of the second planar outer surface. Advantageously, positioning an air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0387] The air inlet may be located in the center with respect to the length of the second planar outer layer. The air inlet may be located in the center with respect to the width of the second planar outer layer. The air inlet may be located in the center with respect to both the length and the width of the second planar outer layer.

[0388] An air inlet may be located off-center with respect to the length of the second planar outer layer. An air inlet may be located off-center with respect to the width of the second planar outer layer. An air inlet may be located off-center with respect to both the length and width of the second planar outer layer. Advantageously, positioning an air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0389] The air inlet may be located at the center with respect to the length of the second aerosol generating substrate layer. The air inlet may be located at the center with respect to the width of the second aerosol generating substrate layer. The air inlet may be located at the center with respect to both the length and the width of the second aerosol generating substrate layer.

[0390] An air inlet may be located off-center with respect to the length of the second aerosol generating substrate layer. An air inlet may be located off-center with respect to the width of the second aerosol generating substrate layer. An air inlet may be located off-center with respect to both the length and width of the second aerosol generating substrate layer. Advantageously, by positioning an air outlet off-center, an airflow passage having an increased length, such as a length greater than the length of the aerosol generating article, can be provided.

[0391] An air outlet can be defined by an upper outer wall and can extend through the upper outer wall. An air outlet can be defined by a first planar outer surface and can extend through it. An air outlet can be defined by an outer wrapper and can extend through it. An air outlet can be defined by an outer wrapper and an aerosol generating substrate layer and can extend through it. An air outlet can be defined by an outer wrapper and a first aerosol generating substrate layer and can extend through it. An air outlet can be defined by a first planar outer layer and an aerosol generating substrate layer and can extend through it. An air outlet can be defined by a first planar outer layer and a first aerosol generating substrate layer and can extend through it.

[0392] The air outlet can be located in the center with respect to the length of the upper outer wall. The air outlet can be located in the center with respect to the width of the upper outer wall. The air outlet can be located in the center with respect to both the length and the width of the upper outer wall.

[0393] The air outlet may be located off-center with respect to the length of the upper outer wall. The air outlet may be located off-center with respect to the width of the upper outer wall. The air outlet may be located off-center with respect to both the length and width of the upper outer wall. Advantageously, locating the air outlet off-center can provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0394] The air outlet may be located at the center with respect to the length of the first planar outer surface. The air outlet may be located at the center with respect to the width of the first planar outer surface. The air outlet may be located at the center with respect to both the length and the width of the first planar outer surface.

[0395] The air outlet may be located off-center with respect to the length of the first planar outer surface. The air outlet may be located off-center with respect to the width of the first planar outer surface. The air outlet may be located off-center with respect to both the length and the width of the first planar outer surface. Advantageously, locating the air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0396] The air outlet may be located in the center with respect to the length of the first planar outer layer. The air outlet may be located in the center with respect to the width of the first planar outer layer. The air outlet may be located in the center with respect to both the length and the width of the first planar outer layer.

[0397] The air outlet may be located off-center with respect to the length of the first planar outer layer. The air outlet may be located off-center with respect to the width of the first planar outer layer. The air outlet may be located off-center with respect to both the length and the width of the first planar outer layer. Advantageously, locating the air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0398] The air outlet may be located at the center with respect to the length of the first aerosol generating substrate layer. The air outlet may be located at the center with respect to the width of the first aerosol generating substrate layer. The air outlet may be located at the center with respect to both the length and the width of the first aerosol generating substrate layer.

[0399] An air outlet may be located off-center with respect to the length of the first aerosol generating substrate layer. An air outlet may be located off-center with respect to the width of the first aerosol generating substrate layer. An air outlet may be located off-center with respect to both the length and the width of the first aerosol generating substrate layer. Advantageously, positioning the air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol generating article.

[0400] An air outlet may be defined by a lower outer wall and may extend through the lower outer wall. An air outlet may be defined by a second planar outer surface and may extend through it. An air outlet may be defined by an outer wrapper and a second aerosol generating substrate layer and may extend through it. An air outlet may be defined by a second planar outer layer and an aerosol generating substrate layer and may extend through them. An air outlet may be defined by a second planar outer layer and a second aerosol generating substrate layer and may extend through them.

[0401] The air outlet can be located in the center with respect to the length of the lower outer wall. The air outlet can be located in the center with respect to the width of the lower outer wall. The air outlet can be located in the center with respect to both the length and the width of the lower outer wall.

[0402] The air outlet may be located off-center with respect to the length of the lower outer wall. The air outlet may be located off-center with respect to the width of the lower outer wall. The air outlet may be located off-center with respect to both the length and width of the lower outer wall. Advantageously, positioning the air outlet off-center can provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0403] The air outlet may be located in the center with respect to the length of the second planar outer surface. The air outlet may be located in the center with respect to the width of the second planar outer surface. The air outlet may be located in the center with respect to both the length and the width of the second planar outer surface.

[0404] The air outlet may be located off-center with respect to the length of the second planar outer surface. The air outlet may be located off-center with respect to the width of the second planar outer surface. The air outlet may be located off-center with respect to both the length and the width of the second planar outer surface. Advantageously, positioning the air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0405] The air outlet may be located in the center with respect to the length of the second planar outer layer. The air outlet may be located in the center with respect to the width of the second planar outer layer. The air outlet may be located in the center with respect to both the length and the width of the second planar outer layer.

[0406] The air outlet may be located off-center with respect to the length of the second planar outer layer. The air outlet may be located off-center with respect to the width of the second planar outer layer. The air outlet may be located off-center with respect to both the length and the width of the second planar outer layer. Advantageously, locating the air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol-generating article.

[0407] The air outlet may be located in the center with respect to the length of the second aerosol generating substrate layer. The air outlet may be located in the center with respect to the width of the second aerosol generating substrate layer. The air outlet may be located in the center with respect to both the length and the width of the second aerosol generating substrate layer.

[0408] The air outlet may be located off-center with respect to the length of the second aerosol generating substrate layer. The air outlet may be located off-center with respect to the width of the second aerosol generating substrate layer. The air outlet may be located off-center with respect to both the length and width of the second aerosol generating substrate layer. Advantageously, locating the air outlet off-center may provide an airflow passage having an increased length, such as a length greater than the length of the aerosol generating article.

[0409] The air inlet and air outlet may be arranged so that there is an angle of 45 degrees or more between the air inlet and the air outlet. The air inlet and air outlet may be arranged so that there is an angle of 60 degrees or more between the air inlet and the air outlet. The air inlet and air outlet may be arranged so that there is an angle of 85 degrees or more between the air inlet and the air outlet. The air inlet and air outlet may be arranged so that there is an angle of 90 degrees or more between the air inlet and the air outlet.

[0410] The air inlet and air outlet may be arranged so that there is an angle of less than 120 degrees between the air inlet and the air outlet. The air inlet and air outlet may be arranged so that there is an angle of 100 degrees or more between the air inlet and the air outlet.

[0411] The air inlet and air outlet may be arranged so that there is an angle of 45 to 120 degrees between the air inlet and the air outlet. The air inlet and air outlet may be arranged so that there is an angle of 60 to 100 degrees between the air inlet and the air outlet. The air inlet and air outlet may be arranged so that there is an angle of 80 to 100 degrees between the air inlet and the air outlet.

[0412] The air inlet may have an equivalent diameter of 0.1 mm or more. The air inlet may have an equivalent diameter of 0.4 mm or more. The air inlet may have an equivalent diameter of 0.7 mm or more. The air inlet may have an equivalent diameter of 1.0 mm or more. The air inlet may have an equivalent diameter of 1.2 mm or more. The air inlet may have an equivalent diameter of 1.4 mm or more.

[0413] The air inlet may have an equivalent diameter of 3 mm or less. The air inlet may have an equivalent diameter of 2.7 mm or less. The air inlet may have an equivalent diameter of 2.4 mm or less. The air inlet may have an equivalent diameter of 2.1 mm or less. The air inlet may have an equivalent diameter of 1.8 mm or less. The air inlet may have an equivalent diameter of 1.5 mm or less.

[0414] The air inlet may have an equivalent diameter of 0.1 mm to 3 mm. The air inlet may have an equivalent diameter of 0.1 mm to 2.4 mm. The air inlet may have an equivalent diameter of 0.4 mm to 2.1 mm. The air inlet may have an equivalent diameter of 0.4 mm to 1.8 mm. The air inlet may have an equivalent diameter of 0.7 mm to 1.5 mm. The air inlet may have an equivalent diameter of 1.0 mm to 1.5 mm.

[0415] The air outlet may have an equivalent diameter of 0.1 mm or more. The air outlet may have an equivalent diameter of 0.4 mm or more. The air outlet may have an equivalent diameter of 0.7 mm or more. The air outlet may have an equivalent diameter of 1.0 mm or more. The air outlet may have an equivalent diameter of 1.2 mm or more. The air outlet may have an equivalent diameter of 1.4 mm or more.

[0416] The air outlet may have an equivalent diameter of 3 mm or less. The air outlet may have an equivalent diameter of 2.7 mm or less. The air outlet may have an equivalent diameter of 2.4 mm or less. The air outlet may have an equivalent diameter of 2.1 mm or less. The air outlet may have an equivalent diameter of 1.8 mm or less. The air outlet may have an equivalent diameter of 1.5 mm or less.

[0417] The air outlet may have an equivalent diameter of 0.1 mm to 3 mm. The air outlet may have an equivalent diameter of 0.1 mm to 2.4 mm. The air outlet may have an equivalent diameter of 0.4 mm to 2.1 mm. The air outlet may have an equivalent diameter of 0.4 mm to 1.8 mm. The air outlet may have an equivalent diameter of 0.7 mm to 1.5 mm. The air outlet may have an equivalent diameter of 1.0 mm to 1.5 mm.

[0418] The air inlet may have a width narrower than the width of the cavity. The air outlet may have a width narrower than the width of the cavity. The air inlet may have a thickness thinner than the thickness of the cavity. The air outlet may have a thickness thinner than the thickness of the cavity.

[0419] The air inlet may have a width of 0.3 mm to 3 mm. The air inlet may have a width of 0.5 mm to 2 mm.

[0420] The air inlet may have a thickness of 0.3 mm to 3 mm. The air outlet may have a thickness of 0.5 mm to 2 mm.

[0421] Preferably, the air inlet may have a width of 0.3 mm to 3 mm and a thickness of 0.3 mm to 3 mm.

[0422] The air outlet may have a width of 0.3 mm to 3 mm. The air outlet may have a width of 0.5 mm to 2 mm.

[0423] The air outlet may have a thickness of 0.3 mm to 3 mm. The air outlet may have a thickness of 0.5 mm to 2 mm.

[0424] Preferably, the air outlet may have a width of 0.3 mm to 3 mm and a thickness of 0.3 mm to 3 mm.

[0425] Advantageously, an aerosol generating article having an air inlet or an air outlet having a width of 0.3 mm to 3 mm and a thickness of 0.3 mm to 3 mm can provide good suction resistance through the aerosol generating article.

[0426] Advantageously, an aerosol generating article having an air outlet or air inlet having a width of 0.3 mm to 3 mm and a thickness of 0.3 mm to 3 mm can provide a relatively large inlet or outlet opening while allowing improved retention of the aerosol generating material within the aerosol generating article. Improved retention of the aerosol generating material within the aerosol generating article can reduce the risk of the aerosol generating material falling out of the aerosol generating article.

[0427] The ratio of the width of the air inlet to the thickness of the air inlet may be 0.33 to 3. The ratio of the width of the air inlet to the thickness of the air inlet may be 0.5 to 1.5. The ratio of the width of the air inlet to the thickness of the air inlet may be 0.75 to 1.25.

[0428] The ratio of the width of the air outlet to the thickness of the air outlet may be 0.33 to 3. The ratio of the width of the air outlet to the thickness of the air outlet may be 0.5 to 1.5. The ratio of the width of the air outlet to the thickness of the air outlet may be 0.75 to 1.25.

[0429] The air inlet may include one or more air inlet apertures. The air inlet may include multiple air inlet apertures. The air inlet may be composed of a single air inlet aperture. The air inlet may be composed of a single air inlet aperture. One or each of the air inlet apertures may have one or more of the features of the air inlet described herein.

[0430] The air outlet may include one or more air outlet apertures. The air outlet may include multiple air outlet apertures. The air outlet may include a single air outlet aperture. The air outlet may be composed of a single air outlet aperture. One or each of the air outlets may have one or more of the features of the air outlet described herein.

[0431] The length of the shortest airflow path between any one of the one or more air inlets and any one of the one or more air outlets may be greater than the length of the article.

[0432] The ratio of the length of the shortest airflow path to the length of the item may be 1.05:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 1.1:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 1.15:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 1.2:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 1.25:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 1.3:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 1.4:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 1.5:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 2:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 2.5:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 3:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 3.5:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 4:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 4.5:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 5:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 6:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 7:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 8:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 9:1 or greater. The ratio of the length of the shortest airflow path to the length of the item may be 10:1 or greater.

[0433] The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 10:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 9:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 8:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 7:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 6:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 5:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 4:5. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 4:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 3.5:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 3:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 2.5:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 2:1. The ratio of the length of the shortest airflow path to the length of the aerosol-generating item may be less than 1.5:1.

[0434] The ratio of the length of the shortest airflow path to the length of the item may be 1.05:1 to 10:1. The ratio of the length of the shortest airflow path to the length of the item may be 1.1:1 to 9:1. The ratio of the length of the shortest airflow path to the length of the item may be 1.2:1 to 8:1. The ratio of the length of the shortest airflow path to the length of the item may be 1.3:1 to 7:1. The ratio of the length of the shortest airflow path to the length of the item may be 1.4:1 to 6:1. The ratio of the length of the shortest airflow path to the length of the item may be 1.5:1 to 5:1.

[0435] The length of one or more airflow passages in contact with one or more aerosol generating materials may be 30% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 40% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 50% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 60% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 70% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 80% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 90% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 100% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 105% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 110% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 120% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 130% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 140% or more of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 150% or more of the length of the article.

[0436] The length of one or more airflow passages in contact with one or more aerosol generating materials may be less than 300% of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be less than 250% of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be less than 200% of the length of the article.

[0437] The length of one or more airflow passages in contact with one or more aerosol generating materials may be 30% to 300% of the length of the article. The length of one or more airflow passages in contact with one or more aerosol generating materials may be 50% to 200% of the length of the article.

[0438] The shortest airflow path may be the minimum airflow path extending between the air inlet and the air outlet. The length of the shortest airflow path may be the minimum length required to make air flow from the air inlet to the air outlet.

[0439] The shortest airflow path can have a length of 20 mm or more. The shortest airflow path can have a length of 22 mm or more. The shortest airflow path can have a length of 24 mm or more. The shortest airflow path can have a length of 26 mm or more. The shortest airflow path can have a length of 28 mm or more. The shortest airflow path can have a length of 30 mm or more. The shortest airflow path can have a length of 32 mm or more. The shortest airflow path can have a length of 34 mm or more. The shortest airflow path can have a length of 36 mm or more. The shortest airflow path can have a length of 38 mm or more. The shortest airflow path can have a length of 40 mm or more. The shortest airflow path can have a length of 45 mm or more. The shortest airflow path can have a length of 50 mm or more. The shortest airflow path can have a length of 55 mm or more. The shortest airflow path can have a length of 60 mm or more. The shortest airflow path can have a length of 65 mm or more. The shortest airflow path can have a length of 70 mm or more. The shortest airflow path can have a length of 75 mm or more. The shortest airflow path can have a length of 80 mm or more. The shortest airflow path can have a length of 90 mm or more. The shortest airflow path can have a length of 100 mm or more. The shortest airflow path can have a length of 110 mm or more. The shortest airflow path can have a length of 120 mm or more. The shortest airflow path can have a length of 130 mm or more. The shortest airflow path can have a length of 140 mm or more. The shortest airflow path can have a length of 150 mm or more.

[0440] The shortest airflow path may have a length of less than 300 mm. The shortest airflow path may have a length of less than 250 mm. The shortest airflow path may have a length of less than 200 mm. The shortest airflow path may have a length of less than 150 mm. The shortest airflow path may have a length of less than 140 mm. The shortest airflow path may have a length of less than 130 mm. The shortest airflow path may have a length of less than 120 mm. The shortest airflow path may have a length of less than 110 mm. The shortest airflow path may have a length of less than 100 mm. The shortest airflow path may have a length of less than 90 mm. The shortest airflow path may have a length of less than 80 mm. The shortest airflow path may have a length of less than 70 mm. The shortest airflow path may have a length of less than 60 mm. The shortest airflow path may have a length of less than 50 mm. The shortest airflow path may have a length of less than 40 mm. The shortest airflow path may have a length of less than 35 mm. The shortest airflow path may have a length of less than 30 mm. The shortest airflow path may have a length of less than 25 mm.

[0441] The shortest airflow path may have a length of 20 mm to 300 mm. The shortest airflow path may have a length of 20 mm to 150 mm. The shortest airflow path may have a length of 25 mm to 100 mm.

[0442] The airflow passage may have a width of 1 mm or more. The airflow passage may have a width of 2 mm or more. The airflow passage may have a width of 3 mm or more. The airflow passage may have a width of 4 mm or more. The airflow passage may have a width of 4.5 mm or more. The airflow passage may have a width of 5 mm or more. The airflow passage may have a width of 7 mm or more. The airflow passage may have a width of 9 mm or more. The airflow passage may have a width of 11 mm or more.

[0443] The airflow passage may have a width of 13 mm or less. The airflow passage may have a width of 11 mm or less. The airflow passage may have a width of 9 mm or less. The airflow passage may have a width of 7 mm or less. The airflow passage may have a width of 5 mm or less. The airflow passage may have a width of 4 mm or less. The airflow passage may have a width of 3 mm or less. The airflow passage may have a width of 2 mm or less.

[0444] The airflow passage may have a width of 1 mm to 13 mm. The airflow passage may have a width of 2 mm to 11 mm. The airflow passage may have a width of 3 mm to 9 mm.

[0445] An airflow passage may have a cross-sectional area of ​​0.5 mm² or more. An airflow passage may have a cross-sectional area of ​​1 mm² or more. An airflow passage may have a cross-sectional area of ​​1.5 mm² or more. An airflow passage may have a cross-sectional area of ​​2 mm² or more. An airflow passage may have a cross-sectional area of ​​2.5 mm² or more. An airflow passage may have a cross-sectional area of ​​3 mm² or more. An airflow passage may have a cross-sectional area of ​​4 mm² or more. An airflow passage may have a cross-sectional area of ​​5 mm² or more. An airflow passage may have a cross-sectional area of ​​6 mm² or more. An airflow passage may have a cross-sectional area of ​​7 mm² or more. An airflow passage may have a cross-sectional area of ​​8 mm² or more. An airflow passage may have a cross-sectional area of ​​9 mm² or more. An airflow passage may have a cross-sectional area of ​​10 mm² or more. An airflow passage may have a cross-sectional area of ​​12 mm² or more. The airflow passage may have a cross-sectional area of ​​15 mm² or more. The airflow passage may have a cross-sectional area of ​​20 mm² or more. The airflow passage may have a cross-sectional area of ​​25 mm² or more. The airflow passage may have a cross-sectional area of ​​30 mm² or more. The airflow passage may have a cross-sectional area of ​​40 mm² or more. The airflow passage may have a cross-sectional area of ​​50 mm² or more.

[0446] The airflow passage may have a cross-sectional area of ​​less than 60 mm². The airflow passage may have a cross-sectional area of ​​less than 50 mm². The airflow passage may have a cross-sectional area of ​​less than 40 mm². The airflow passage may have a cross-sectional area of ​​less than 30 mm². The airflow passage may have a cross-sectional area of ​​less than 25 mm². The airflow passage may have a cross-sectional area of ​​less than 20 mm². The airflow passage may have a cross-sectional area of ​​less than 15 mm². The airflow passage may have a cross-sectional area of ​​less than 12 mm². The airflow passage may have a cross-sectional area of ​​less than 10 mm². The airflow passage may have a cross-sectional area of ​​less than 9 mm². The airflow passage may have a cross-sectional area of ​​less than 8 mm². The airflow passage may have a cross-sectional area of ​​less than 7 mm².

[0447] The airflow passage may have a cross-sectional area of ​​less than 6 mm². The airflow passage may have a cross-sectional area of ​​less than 5 mm². The airflow passage may have a cross-sectional area of ​​less than 4 mm². The airflow passage may have a cross-sectional area of ​​less than 3 mm².

[0448] The airflow passage may have a cross-sectional area of ​​0.5 mm to 50 mm. The airflow passage may have a cross-sectional area of ​​0.5 mm to 40 mm. The airflow passage may have a cross-sectional area of ​​0.5 mm to 30 mm. The airflow passage may have a cross-sectional area of ​​0.5 mm to 20 mm. The airflow passage may have a cross-sectional area of ​​1 mm to 15 mm. The airflow passage may have a cross-sectional area of ​​1 mm to 10 mm.

[0449] The aerosol-generating article may include an airflow passage obstruction. The airflow passage obstruction may be located within the airflow passage. The airflow passage obstruction may be located within a cavity. The airflow passage obstruction may be configured to impede or obstruct airflow through the airflow passage. The airflow passage obstruction may be configured to obstruct airflow through the airflow passage by blocking direct airflow from the air inlet to the air outlet. The airflow passage obstruction may be configured to increase the length of the airflow passage.

[0450] An airflow passage obstruction may extend from the upper outer wall. An airflow passage obstruction may extend from the inner surface of the upper outer wall. An airflow passage obstruction may extend from the upper outer wall toward the lower outer wall. An airflow passage obstruction may extend from the inner surface of the upper outer wall toward the inner surface of the lower outer wall.

[0451] An airflow passage obstruction may extend from the lower outer wall. An airflow passage obstruction may extend from the inner surface of the lower outer wall. An airflow passage obstruction may extend from the lower outer wall toward the upper outer wall. An airflow passage obstruction may extend from the inner surface of the lower outer wall toward the inner surface of the upper outer wall.

[0452] The airflow passage obstruction may extend from the lower outer wall to the upper outer wall. The airflow passage obstruction may extend from the inner surface of the lower outer wall to the inner surface of the upper outer wall.

[0453] An airflow passage obstacle may extend from a first planar outer surface. An airflow passage obstacle may extend from an inner surface of the first planar outer surface. An airflow passage obstacle may extend from the first planar outer surface toward a second planar outer surface. An airflow passage obstacle may extend from an inner surface of the first planar outer surface toward an inner surface of the second planar outer surface.

[0454] The airflow passage obstacle may extend from the second planar outer surface. The airflow passage obstacle may extend from the inner surface of the second planar outer surface. The airflow passage obstacle may extend from the second planar outer surface to the first planar outer surface. The airflow passage obstacle may extend from the inner surface of the second planar outer surface toward the inner surface of the first planar outer surface.

[0455] The airflow passage obstruction may extend from the first planar outer surface to the second planar outer surface. The airflow passage obstruction may extend from the inner surface of the first planar outer surface to the inner surface of the second planar outer surface.

[0456] The airflow passage obstacle may extend from the first planar outer layer. The airflow passage obstacle may extend from the inner surface of the first planar outer layer. The airflow passage obstacle may extend from the first planar outer layer toward the second planar outer layer. The airflow passage obstacle may extend from the inner surface of the first planar outer layer toward the inner surface of the second planar outer layer.

[0457] The airflow passage obstacle may extend from the second planar outer layer. The airflow passage obstacle may extend from the inner surface of the second planar outer layer. The airflow passage obstacle may extend from the second planar outer layer toward the first planar outer layer. The airflow passage obstacle may extend from the inner surface of the second planar outer layer toward the inner surface of the first planar outer layer.

[0458] The airflow passage obstacle may extend from the first planar outer layer to the second planar outer layer. The airflow passage obstacle may extend from the inner surface of the first planar outer layer to the inner surface of the second planar outer layer.

[0459] An airflow passage obstacle may extend from the first aerosol generating substrate layer. An airflow passage obstacle may extend from the inner surface of the first aerosol generating substrate layer. An airflow passage obstacle may extend from the first aerosol generating substrate layer toward the second aerosol generating substrate layer. An airflow passage obstacle may extend from the inner surface of the first aerosol generating substrate layer toward the inner surface of the second aerosol generating substrate layer.

[0460] An airflow passage obstacle may extend from the second aerosol generating substrate layer. An airflow passage obstacle may extend from the inner surface of the second aerosol generating substrate layer. An airflow passage obstacle may extend from the second aerosol generating substrate layer toward the first aerosol generating substrate layer. An airflow passage obstacle may extend from the inner surface of the second aerosol generating substrate layer toward the inner surface of the first aerosol generating substrate layer.

[0461] The airflow passage obstruction may extend from the first aerosol generating substrate layer to the second aerosol generating substrate layer. The airflow passage obstruction may extend from the inner surface of the first aerosol generating substrate layer to the inner surface of the second aerosol generating substrate layer.

[0462] Airflow passage obstacles may extend from the frame. Airflow passage obstacles may extend laterally from the frame. Airflow passage obstacles may extend longitudinally from the frame. Airflow passage obstacles may extend from the inner surface of the frame. Airflow passage obstacles may extend laterally from the inner surface of the frame. Airflow passage obstacles may extend longitudinally from the inner surface of the frame.

[0463] Airflow passage obstacles can be formed of metal, polymer, or cellulose materials.

[0464] An airflow passageway obstacle may include one or more airflow passageway walls. An airflow passageway obstacle may include multiple airflow passageway walls. An airflow passageway obstacle may include a single airflow passageway wall.

[0465] When viewed in a planar view, the airflow passage obstacle or airflow passage wall may have a shape defining a polygon, one or more quadrilaterals (e.g., rectangles or squares), an ellipse or a circle, or a combination thereof.

[0466] When viewed in a planar view, airflow passage obstacles or airflow passage walls can have a spiral shape. When viewed in a planar view, airflow passage obstacles or airflow passage walls can have a maze shape. When viewed in a planar view, airflow passage obstacles or airflow passage walls can have an S shape.

[0467] The airflow passage wall obstacle or the airflow passage wall may have a rectangular shape.

[0468] The aerosol generating article may include a filter element located downstream of an aerosol forming substrate. The aerosol generating article may include a filter element located downstream of a cavity. The aerosol generating article may include a filter element located at least partially within an air outlet. The aerosol generating article may include a filter element located within a cavity and may be located at the downstream end of the cavity.

[0469] The aerosol generating article may include a filter element located upstream of an aerosol forming substrate. The aerosol generating article may include a filter element located upstream of a cavity. The aerosol generating article may include a filter element located at least partially within an air inlet. The aerosol generating article may include a filter element located within a cavity and may be located at the upstream end of the cavity.

[0470] The filter element may comprise one or more filter segments of a fibrous filtration material. Suitable fibrous filtration materials will be known to those skilled in the art. The filter element may comprise cellulose acetate.

[0471] The aerosol-generating article may include a front wall. The front wall may extend from a first planar outer surface to a second planar outer surface. That is, the front wall extends in the transverse direction. The front wall may be a downstream wall and may be referred to as a downstream wall. The front wall may be defined by a frame, for example, by a periphery wall of the frame.

[0472] The aerosol-generating article may include a rear wall. The rear wall may extend from a first planar outer surface to a second planar outer surface. That is, the rear wall extends in the transverse direction. The rear wall may be an upstream wall and may be referred to as an upstream wall. The rear wall may be defined by a frame, for example, by a periphery wall of the frame.

[0473] The aerosol-generating article may include one or more side walls. The one or more side walls may include a first side wall and a second side wall, e.g., a left side wall and a right side wall. The first side wall and the second side wall may face each other. The one or more side walls may extend from a front wall to a rear wall. The one or more side walls may extend from a first planar outer surface to a second planar outer surface. The one or more side walls, such as the first side wall and the second side wall, may be defined by a frame, e.g., by the periphery walls of the frame.

[0474] Any two or more of the front wall, rear wall, and one or more side walls may be integral with each other. Advantageously, such a structure can provide a rigid article that is easy to manufacture.

[0475] The aerosol generating article may include a first end surface. The first end surface may extend from a first planar outer surface to a second planar outer surface. The first end surface may be defined or formed by an outer wall of the aerosol generating article, such as a front wall or a rear wall.

[0476] The aerosol generating article may include a second end surface. The second end surface may extend from a first planar outer surface to a second planar outer surface. The second end surface may be defined or formed by an outer wall or surface of the aerosol generating article, such as a front wall or a rear wall. The second end surface may be positioned opposite the first end surface. The second end surface may be parallel to the first end surface.

[0477] The aerosol generating article may include a first side. The first side may extend from a first planar outer surface to a second planar outer surface. The first side may be defined or formed by an outer wall of the aerosol generating article, such as a first side wall or a second side wall. The first side may extend from a first end surface to a second end surface.

[0478] The aerosol generating article may include a second side. The second side may extend from a first planar outer surface to a second planar outer surface. The second side may be defined or formed by an outer wall of the aerosol generating article, such as a first side wall or a second side wall. The second side may extend from a first end surface to a second end surface. The second side may be positioned opposite to the first side. The second side may be parallel to the first side.

[0479] The first end surface and the first side surface can form an interior angle of 90° or less. The first end surface and the second side surface can form an interior angle of 90° or less.

[0480] The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may exceed 2:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may exceed 3:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may exceed 4:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may exceed 5:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may exceed 10:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may exceed 12:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may exceed 15:1.

[0481] The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may be less than 15:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may be less than 12:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may be less than 10:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may be less than 5:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may be less than 4:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article may be less than 3:1. The ratio between the length and thickness of an aerosol-generating article, and the ratio between the width and thickness of an aerosol-generating article is less than 2.5:1.

[0482] The ratio between the length and thickness of the aerosol generating article, and the ratio between the width and thickness of the aerosol generating article may be 2:1 to 15:1. The ratio between the length and thickness of the aerosol generating article, and the ratio between the width and thickness of the aerosol generating article may be 2:1 to 12:1. The ratio between the length and thickness of the aerosol generating article, and the ratio between the width and thickness of the aerosol generating article may be 2:1 to 10:1. The ratio between the length and thickness of the aerosol generating article, and the ratio between the width and thickness of the aerosol generating article may be 3:1 to 10:1. The ratio between the length and thickness of the aerosol generating article, and the ratio between the width and thickness of the aerosol generating article may be 4:1 to 10:1. The ratio between the length and thickness of the aerosol generating article, and the ratio between the width and thickness of the aerosol generating article may be 5:1 to 10:1.

[0483] The ratio between the length and width of an aerosol-generating article may exceed 1:1. The ratio between the length and width of an aerosol-generating article may exceed 1.25:1. The ratio between the length and width of an aerosol-generating article may exceed 1.5:1. The ratio between the length and width of an aerosol-generating article may exceed 2:1. The ratio between the length and width of an aerosol-generating article may exceed 2.5:1. The ratio between the length and width of an aerosol-generating article may exceed 3:1. The ratio between the length and width of an aerosol-generating article may exceed 4:1. The ratio between the length and width of an aerosol-generating article may exceed 5:1.

[0484] The ratio between the length and width of an aerosol-generating article may be less than 10:1. The ratio between the length and width of an aerosol-generating article may be less than 8:1. The ratio between the length and width of an aerosol-generating article may be less than 5:1. The ratio between the length and width of an aerosol-generating article may be less than 4:1. The ratio between the length and width of an aerosol-generating article may be less than 3.5:1. The ratio between the length and width of an aerosol-generating article may be less than 3:1. The ratio between the length and width of an aerosol-generating article may be less than 2.5:1. The ratio between the length and width of an aerosol-generating article may be less than 2:1.

[0485] The ratio between the length and width of the aerosol-generating article may be 1:1 to 10:1. The ratio between the length and width of the aerosol-generating article may be 1.5:1 to 5:1. The ratio between the length and width of the aerosol-generating article may be 1.5:1 to 4:1. The ratio between the length and width of the aerosol-generating article may be 1.5:1 to 3:1. The ratio between the length and width of the aerosol-generating article may be 2:1 to 4:1. The ratio between the length and width of the aerosol-generating article may be 2:1 to 3:1.

[0486] The ratio between the thickness and width of an aerosol-generating article may exceed 1:1. The ratio between the thickness and width of an aerosol-generating article may exceed 1:1.25. The ratio between the thickness and width of an aerosol-generating article may exceed 1:1.5. The ratio between the thickness and width of an aerosol-generating article may exceed 1:2. The ratio between the thickness and width of an aerosol-generating article may exceed 1:2.5. The ratio between the thickness and width of an aerosol-generating article may exceed 1:3. The ratio between the thickness and width of an aerosol-generating article may exceed 1:4. The ratio between the thickness and width of an aerosol-generating article may exceed 1:5.

[0487] The ratio between the thickness and width of an aerosol-generating article may be less than 1:10. The ratio between the thickness and width of an aerosol-generating article may be less than 1:8. The ratio between the thickness and width of an aerosol-generating article may be less than 1:5. The ratio between the thickness and width of an aerosol-generating article may be less than 1:4. The ratio between the thickness and width of an aerosol-generating article may be less than 1:3.5. The ratio between the thickness and width of an aerosol-generating article may be less than 1:3. The ratio between the thickness and width of an aerosol-generating article may be less than 1:2.5. The ratio between the thickness and width of an aerosol-generating article may be less than 1:2. The ratio between the thickness and width of an aerosol-generating article may be less than 1:1.5. The ratio between the thickness and width of an aerosol-generating article may be less than 1:1.4. The ratio between the thickness and width of an aerosol-generating article may be less than 1:1.3. The ratio between the thickness and width of an aerosol-generating article may be less than 1:1.2. The ratio between the thickness and width of an aerosol-generating article may be less than 1:1.1. The ratio between the thickness and width of an aerosol-generating article may be less than 1:1.

[0488] The ratio between the thickness and width of the aerosol-generating article may be 1:1 to 1:10. The ratio between the thickness and width of the aerosol-generating article may be 1:1.5 to 1:5. The ratio between the thickness and width of the aerosol-generating article may be 1:1.5 to 1:4. The ratio between the thickness and width of the aerosol-generating article may be 1:1.5 to 1:3. The ratio between the thickness and width of the aerosol-generating article may be 1:2 to 1:4. The ratio between the thickness and width of the aerosol-generating article may be 1:2 to 1:3.

[0489] Aerosol generating articles may have a length of 15 mm or more. Aerosol generating articles may have a length of 20 mm or more. Aerosol generating articles may have a length of 25 mm or more. Aerosol generating articles may have a length of 30 mm or more. Aerosol generating articles may have a length of 35 mm or more. Aerosol generating articles may have a length of 40 mm or more.

[0490] Aerosol-generating articles may have a length of 45 mm or less. Aerosol-generating articles may have a length of 40 mm or less. Aerosol-generating articles may have a length of 35 mm or less. Aerosol-generating articles may have a length of 30 mm or less.

[0491] The aerosol generating article may have a length of 15 mm to 45 mm. The aerosol generating article may have a length of 20 mm to 40 mm. The aerosol generating article may have a length of 20 mm to 35 mm. The aerosol generating article may have a length of 25 mm to 30 mm.

[0492] Aerosol-generating articles may have a width of 3 mm or more. Aerosol-generating articles may have a width of 5 mm or more. Aerosol-generating articles may have a width of 7.5 mm or more. Aerosol-generating articles may have a width of 9 mm or more. Aerosol-generating articles may have a width of 11 mm or more. Aerosol-generating articles may have a width of 13 mm or more.

[0493] Aerosol-generating articles may have a width of 17 mm or less. Aerosol-generating articles may have a width of 15 mm or less. Aerosol-generating articles may have a width of 12.5 mm or less. Aerosol-generating articles may have a width of 11 mm or less. Aerosol-generating articles may have a width of 9 mm or less.

[0494] The aerosol generating article may have a width of 3 mm to 17 mm. The aerosol generating article may have a width of 5 mm to 15 mm. The aerosol generating article may have a width of 7.5 mm to 12.5 mm. The aerosol generating article may have a width of 9 mm to 11 mm.

[0495] Aerosol-generating articles may have a thickness of 1 mm or more. Aerosol-generating articles may have a thickness of 1.5 mm or more. Aerosol-generating articles may have a thickness of 2 mm or more. Aerosol-generating articles may have a thickness of 2.5 mm or more. Aerosol-generating articles may have a thickness of 3 mm or more. Aerosol-generating articles may have a thickness of 3.5 mm or more. Aerosol-generating articles may have a thickness of 4 mm or more. Aerosol-generating articles may have a thickness of 4.5 mm or more.

[0496] Aerosol-generating articles may have a thickness of 5.5 mm or less. Aerosol-generating articles may have a thickness of 5 mm or less. Aerosol-generating articles may have a thickness of 4.5 mm or less. Aerosol-generating articles may have a thickness of 4 mm or less. Aerosol-generating articles may have a thickness of 3.5 mm or less. Aerosol-generating articles may have a thickness of 3 mm or less. Aerosol-generating articles may have a thickness of less than 2.5 mm. Aerosol-generating articles may have a thickness of less than 2 mm.

[0497] The aerosol generating article may have a thickness of 1 mm to 5 mm. The aerosol generating article may have a thickness of 1.5 mm to 5 mm. The aerosol generating article may have a thickness of 2 mm to 4.5 mm. The aerosol generating article may have a thickness of 2.5 mm to 4 mm. The aerosol generating article may have a thickness of 3 mm to 3.5 mm.

[0498] The aerosol generating article may have, for example, a length of 15 mm to 45 mm, a width of 5 mm to 15 mm, and a thickness of 1 mm to 5 mm.

[0499] Preferably, the aerosol generating article may have a length of 20 mm to 30 mm, a width of 7.5 mm to 12.5 mm, and a thickness of 2.5 mm to 4 mm.

[0500] More preferably, the aerosol generating article may have a length of 30 mm, a width of 10 mm, and a thickness of 3.1 mm.

[0501] Advantageously, providing an aerosol generating article having a length of 15 mm to 45 mm, a width of 5 mm to 15 mm, and a thickness of 1 mm to 5 mm allows the aerosol generating article to have a high proportion of external surface-to-body volume. An aerosol generating article having a high proportion of external surface-to-body volume can be heated more efficiently, which can vaporize the aerosol generating material stored within the aerosol generating article more effectively. Better vaporization of the aerosol generating material stored within the aerosol generating article can improve the user experience.

[0502] Advantageously, providing an aerosol generating article having a length of 15 mm to 45 mm, a width of 5 mm to 15 mm, and a thickness of 1 mm to 5 mm, having a cavity having a length of 14 mm to 40 mm, a width of 4.5 mm to 13 mm, and a thickness of 0.5 mm to 4.5 mm, allows the aerosol generating article to include a large cavity and have a high cavity volume in proportion to the external volume of the aerosol generating article.

[0503] The aerosol-generating article may have an external volume of 75 mm³ to 3375 mm³. The aerosol-generating article may have an external volume of 375 mm³ to 1750 mm³.

[0504] According to the present disclosure, an aerosol generating device for receiving an aerosol generating article as described herein is provided. The aerosol generating device comprises a cavity dimensioned to receive at least a portion of the aerosol generating article. The aerosol generating device comprises a heater or heating means, a power source for supplying power to the heater or heating means, and a controller for controlling the power supply to the heater or heating means. The aerosol generating device is configured to heat at least one of one or more aerosol generating substrates to form an aerosol, e.g., an inhalable aerosol. The aerosol generating device may be configured to heat each of one or more aerosol generating substrates to form an aerosol, e.g., an inhalable aerosol.

[0505] The cavity of the aerosol generating device may include an opening into which an end, such as the longitudinal end of an aerosol generating article, can be inserted. The cavity of the aerosol generating device may have any suitable cross-sectional shape. For example, the cavity of the aerosol generating device may have a rectangular cross section, for example, a rectangular cross section having opposing top and bottom sides that are longer than the left and right sides.

[0506] Preferably, at least one inner surface of the cavity of the aerosol generator is a heating surface configured to heat an aerosol generating article. The heating surface may include a heater, for example, a resistance heater or an infrared heater, or a susceptor configured to be heated by engagement with an inductor. The heating surface may include an inductor, and for example, the surface may include a coil arranged to generate a fluctuating electromagnetic field within the space of the cavity of the aerosol generator. The heating surface may be a surface permeable to the fluctuating electromagnetic field so that an inductor arranged outside the cavity can transmit the fluctuating electromagnetic field through the heating surface and engage with a susceptor arranged inside the cavity of the aerosol generator.

[0507] Preferably, at least the lower surface of the cavity of the aerosol generator is a heating surface configured to heat an aerosol generating article. Optionally, both the lower surface and the upper surface of the cavity of the aerosol generator are heating surfaces configured to heat an aerosol generating article.

[0508] Preferably, at least the lower inner surface of the cavity of the aerosol generator is a substantially planar surface, and preferably, both the lower inner surface and the upper inner surface of the cavity of the aerosol generator are substantially planar. Preferably, the upper inner surface and the lower inner surface of the cavity of the aerosol generator are arranged in a parallel relationship with each other.

[0509] Optionally, the upper inner surface and the lower inner surface may converge along the length of the cavity of the aerosol generator so as to be spaced slightly closer to the distal end of the cavity than to the proximal end of the cavity. This enables the cavity of the aerosol generator to grasp an aerosol generating article inserted therein. The lateral inner surface may converge in a similar manner to achieve the result of grasping the aerosol generating article. The upper inner surface and the lower inner surface of the cavity of the aerosol generator, and / or the opposing lateral surface of the cavity of the aerosol generator may converge by 1° to 10°, e.g., 2° to 8°, e.g., 3° ​​to 6°, e.g., 4° to 5° between the proximal end of the cavity and the distal end of the cavity.

[0510] In some embodiments, the lower inner surface and the upper inner surface may be movable relative to each other. For example, the lower inner surface and the upper inner surface may be configured to rotate relative to each other or to move upward and downward relative to each other. This allows the aerosol generating article to be easily inserted into the cavity of the aerosol generating device, while allowing the cavity wall of the aerosol generating device to move to hold the material or article at a position to be heated. For example, the relative movement of the upper inner surface and the lower inner surface may help the aerosol generating article to be held between the two surfaces, facilitating the heating of the article and helping to properly position the article within the device.

[0511] The cavity of the aerosol generating device may be defined by a longitudinal dimension or length, a transverse dimension or width, and a depth dimension or height. The length and width are preferably larger than the height, for example, at least twice the size of the height.

[0512] The aerosol generator may include a heating surface comprising a plurality of separately operable heating zones, for example, two separately operable heating zones, or three separately operable heating zones, or four separately operable heating zones, or five separately operable heating zones, or six separately operable heating zones. The plurality of separately operable heating zones may be configured to operate individually or simultaneously in any combination of two or more zones. In some examples, the plurality of separately operable heating zones may be spaced longitudinally within a cavity. In some examples, the plurality of separately operable heating zones may be spaced transversely within a cavity. Different heating zones may be spaced transversely and longitudinally from one another. Different heating zones may be arranged concentrically with respect to one another.

[0513] The aerosol generating device may include one or more resistance heaters, for example, one or more resistance heaters integrated into the wall of the cavity.

[0514] The device may include one or more inductors, for example, one or more inductors that are integrated into the walls of the cavity of the aerosol generator, or arranged to generate a fluctuating electromagnetic field in the walls of the cavity of the aerosol generator, or within the cavity of the aerosol generator. One or more walls of the cavity of the aerosol generator may include or be made of a susceptor material, and one or more walls of the cavity may heat up upon engagement with the fluctuating electromagnetic field, thereby heating an aerosol generating article inserted into the cavity.

[0515] The aerosol generating device may include one or more insertable heating elements arranged to protrude into the cavity of the aerosol generating device for insertion into an aerosol generating article. The insertable heating element may be a resistive heater. The insertable heating element may be a susceptor.

[0516] The aerosol generating device may include a device body. The device body may include a heater. The aerosol generating device may include a mouthpiece element. The device body may include a device body housing. The device body housing may define a cavity for accommodating at least a portion of an aerosol generating article. The device body and the mouthpiece element may be detachably connected. The mouthpiece element may be detachably connected to the device body, for example, the device body housing.

[0517] The mouthpiece element may be disengaged from the device body, for example, the device body housing, between a connected position and a separated position. In the connected position, the cavity of the aerosol generator may be at least partially covered, for example, by the mouthpiece element. In the separated position, the cavity of the aerosol generator may be at least partially exposed, for example, to allow insertion of an article into the cavity of the aerosol generator. The mouthpiece element may be movable relative to the device body, for example, between a first position and a second position, and may be axially rotatable, for example, around a hinge. In the first position, the cavity of the aerosol generator may be at least partially covered, for example, by the mouthpiece element. In the second position, the cavity may be at least partially exposed, for example, to allow insertion of an article into the cavity of the aerosol generator. Advantageously, covering the cavity of the aerosol generator, or the article within the cavity of the aerosol generator, can ensure that most of the aerosol from the article travels to the user along a desired flow path rather than escaping into the external environment.

[0518] An aerosol generating device, for example, a device body, may include a power source such as a battery. When in use, the power source may provide power to a heater. The device, for example, a device body, may include a controller. The controller may be configured to control power from the power supply to the heater.

[0519] The device body may include a distal end and a proximal end. The cavity of the aerosol generating device may be defined at the proximal end of the device body. The mouthpiece element may include a distal end and a proximal end. The distal end of the mouthpiece element may be configured to be releaseably connected to the proximal end of the device body.

[0520] A mouthpiece element, or at least a portion of the mouthpiece element, may be configured to be inserted into the user's mouth. The proximal end of the mouthpiece element may be configured to be inserted into the user's mouth.

[0521] One or both of the aerosol generating device, for example, the device body and the mouthpiece element, may include an air inlet. The device, for example, the mouthpiece element, may include an air outlet. The device may include an airflow path fluidly connecting the air inlet to the air outlet. The airflow path may extend through and past the cavity of the aerosol generating device, or both. Thus, when in use, the device may be configured such that when negative pressure is applied to the air outlet, for example by a user inhaling over the air outlet, air is drawn in through the air inlet and then passes through or is drawn in through the aerosol generating article contained within the cavity, thereby entraining an aerosol released from the aerosol forming substrate of the article and then entraining it out through the air outlet.

[0522] According to the present disclosure, an aerosol generating system comprises an aerosol generating device as disclosed herein and an aerosol generating article as disclosed herein. The system may include a plurality of such articles for use with the aerosol generating device.

[0523] As used herein, the term "aerosol generating article" refers to an article comprising an aerosol generating material. The article can be heated upon use to generate an inhalable aerosol and deliver it to a consumer.

[0524] As used herein, the term "aerosol generating material" refers to a material capable of releasing a volatile compound upon heating, for example, a compound that generates an aerosol upon cooling and condensation when in use.

[0525] As used herein, the term "aerosol generating device" refers to a device that, when in use, interacts with an aerosol generating substrate of an aerosol generating article to generate an aerosol, for example, by heating it.

[0526] As used herein, the term "air inlet" or "the air inlet" refers to one or more air inlets.

[0527] As used herein, the term "air outlet" or "the air outlet" refers to one or more air outlets.

[0528] As used herein, the term "airflow passage" or "the above airflow passage" refers to one or more airflow passages.

[0529] As used herein, the term “planar” may generally refer to a feature formed on a single Euclidean plane that is not wrapped around a curved non-planar shape or other non-planar shape, or otherwise is not conformed to be fitted with it. A planar surface may extend two dimensions in a single Euclidean plane. A planar object may extend two dimensions in a single Euclidean plane substantially further than in a third dimension perpendicular to the plane. More specifically, a planar object may extend at least two, five, or ten times further in a first dimension and a second dimension perpendicular to the first dimension than in a third dimension perpendicular to the first dimension.

[0530] As used herein, the term "transverse direction" refers to the direction extending between the first planar outer surface and the second planar outer surface.

[0531] As used herein, the term "longitudinal direction" refers to a direction perpendicular to the transverse direction. For example, it is the direction between the front wall and the rear wall of an aerosol-generating article.

[0532] As used herein, the term "lateral" refers to a direction perpendicular to the transverse and longitudinal directions. For example, it is the direction from the first side wall to the second side wall of an aerosol-generating article.

[0533] As used herein, the term "thickness" refers to the maximum dimension in the transverse direction of an aerosol-generating article or a component of an aerosol-generating article.

[0534] As used herein, the term "length" refers to the maximum longitudinal dimension of an aerosol-generating article or a component of an aerosol-generating article.

[0535] As used herein, the term "width" refers to the maximum lateral dimension of an aerosol-generating article or a component of an aerosol-generating article.

[0536] As used herein, the terms “upstream” and “downstream” refer to the relative positions of a component or part of a component of an aerosol generating article with respect to the direction in which air or aerosol is transported through the aerosol generating article during use.

[0537] As used herein, the term "bulk density" may refer to the total weight of an aerosol generating material divided by the bulk volume of the aerosol generating material.

[0538] As used herein, the term "aerosol-forming agent" may refer to any suitable known compound or mixture of compounds that facilitates the formation of an aerosol upon use. The aerosol may be a dense and stable aerosol. The aerosol may be substantially resistant to thermal degradation at the operating temperature of the aerosol-generating substrate or aerosol-generating article.

[0539] As used herein, the term "aerosol-forming agent content" may refer to the aerosol-forming agent content as a percentage based on dry weight, unless otherwise specified.

[0540] As used herein, "susceptor" refers to a conductive element that heats up when affected by a variable magnetic field. This may be the result of eddy currents and / or hysteresis losses induced within the susceptor element.

[0541] As used herein, the term "hydrophobic" refers to a surface that exhibits water repellency. One useful method for determining hydrophobicity is to measure the water contact angle. The "water contact angle" is the angle at which the liquid / vapor interface meets the solid surface, typically measured through a liquid. The water contact angle quantifies the wettability of a solid surface by a liquid using Young's equation.

[0542] As used herein, the term "equivalent diameter" of an opening or perforation is used herein to denote the diameter of a circular opening or perforation having the same cross-sectional area as the opening or perforation.

[0543] As used herein, the term “packing density” refers to the ratio of the total volume of components, such as solid and liquid components of the aerosol generating material located within the cavity, the first cavity, or the second cavity, to the volume of the cavity in which the aerosol generating material is located.

[0544] The present invention is defined in the claims. However, a non-limiting, non-comprehensive list of embodiments is provided below. Any one or more features of these embodiments may be combined with any one or more features of other embodiments, embodiments, or aspects described herein.

[0545] Example Ex1. As an aerosol generating article for generating aerosols by use with an aerosol generating device, the aerosol generating article is:

[0546] First planar outer surface;

[0547] Second planar outer surface;

[0548] cavity;

[0549] A frame positioned between the first planar outer surface and the second planar outer surface, wherein the frame defines at least partially the cavity;

[0550] One or more aerosol generating materials; and

[0551] It includes an air inlet, an air outlet, and an airflow passage extending through the cavity between the air inlet and the air outlet,

[0552] Herein, the air inlet or the air outlet extends through the first planar outer surface or the second planar outer surface, an aerosol generating article.

[0553] Example Ex2. In Ex1, the air inlet comprises one or more air inlet apertures, an aerosol generating article.

[0554] Example Ex3. In Ex1, the air inlet comprises a plurality of air inlet apertures, an aerosol generating article.

[0555] Example Ex4. An aerosol generating article in Ex1 or Ex2, wherein the air inlet comprises a single air inlet aperture.

[0556] Example Ex5. An aerosol generating article in any one of Ex1 to Ex4, wherein the air outlet comprises one or more air outlet apertures.

[0557] Example Ex6. An aerosol generating article in any one of Ex1 to Ex4, wherein the air outlet comprises a plurality of air outlet apertures.

[0558] Example Ex7. An aerosol generating article in any one of Ex1 to Ex6, wherein the air outlet comprises a single air outlet aperture.

[0559] Example Ex8. An aerosol generating article in any one of Ex1 to Ex7, wherein the air inlet extends through the first planar outer surface.

[0560] Example Ex9. An aerosol generating article in any one of Ex1 to Ex7, wherein the air inlet extends through the second planar outer surface.

[0561] Example Ex10. An aerosol generating article in any one of Ex1 to Ex9, wherein the air outlet extends through the first planar outer surface.

[0562] Example Ex11. An aerosol generating article in any one of Ex1 to Ex9, wherein the air outlet extends through the second planar outer surface.

[0563] Example Ex12. An aerosol generating article, wherein in any one of Ex1 to Ex11, the frame comprises a surrounding wall that surrounds or encloses the cavity.

[0564] Example Ex13. In Ex12, the air inlet extends through the surrounding wall, an aerosol generating article.

[0565] Example Ex14. In Ex12, the air outlet extends through the surrounding wall, an aerosol generating article.

[0566] Example Ex15. An aerosol generating article, wherein in any one of Ex1 to Ex14, the one or more aerosol generating substrates comprise a first aerosol generating substrate layer located between the first planar outer surface and the frame, and a second aerosol generating substrate layer located between the second planar outer surface and the frame, and the air inlet or the air outlet extends through the first aerosol generating substrate layer or the second aerosol generating substrate layer.

[0567] Example Ex16. An aerosol generating article comprising, in any one of Ex1 to Ex15, a first planar outer layer and a second planar outer layer, wherein the first planar outer layer defines the first planar outer surface and the second planar outer layer defines the second planar outer surface, and the air inlet or the air outlet extends through the first planar outer layer or the second planar outer layer.

[0568] Example Ex17. An aerosol generating article in any one of Ex1 to Ex16, wherein the air inlet has a round cross-section, a circular cross-section, an oval cross-section, a square cross-section, or a rectangular cross-section.

[0569] Example Ex18. An aerosol generating article, wherein in any one of Ex1 to Ex17, the air outlet has a round cross-section, a circular cross-section, an oval cross-section, a square cross-section, or a rectangular cross-section.

[0570] Example Ex19. An aerosol generating article, wherein in any one of Ex1 to Ex18, the air inlet is positioned at the center with respect to the length of the first planar outer surface or the second planar outer surface.

[0571] Example Ex20. An aerosol generating article, wherein in any one of Ex1 to Ex19, the air inlet may be located at the center with respect to the width of the first planar outer surface or the second planar outer surface.

[0572] Example Ex21. An aerosol generating article, wherein in any one of Ex1 to Ex18, the air inlet is located at a position offset from the center with respect to the length of the first planar outer surface or the second planar outer surface.

[0573] Example Ex22. An aerosol generating article in any one of Ex1 to Ex18 or Ex21, wherein the air inlet is located at a position offset from the center with respect to the width of the first planar outer surface or the second planar outer surface.

[0574] Example Ex23. An aerosol generating article, wherein in any one of Ex1 to Ex22, the air outlet is located at the center with respect to the length of the first planar outer surface or the second planar outer surface.

[0575] Example Ex24. An aerosol generating article, wherein in any one of Ex1 to Ex23, the air outlet may be located at the center with respect to the width of the first planar outer surface or the second planar outer surface.

[0576] Example Ex25. An aerosol generating article, wherein in any one of Ex1 to Ex22, the air outlet is located at a position offset from the center with respect to the length of the first planar outer surface or the second planar outer surface.

[0577] Example Ex26. An aerosol generating article in any one of Ex1 to Ex22 or Ex25, wherein the outlet inlet is located at a position offset from the center with respect to the width of the first planar outer surface or the second planar outer surface.

[0578] Example Ex27. An aerosol generating article, wherein in any one of Ex1 to Ex26, the air inlet has an equivalent diameter of 0.1 mm to 3 mm.

[0579] Example Ex28. An aerosol generating article, wherein in any one of Ex1 to Ex27, the air inlet has an equivalent diameter of 0.4 mm or more.

[0580] Example Ex29. An aerosol generating article, wherein in any one of Ex1 to Ex28, the air inlet has an equivalent diameter of 1 mm or more.

[0581] Example Ex30. An aerosol generating article, wherein in any one of Ex1 to Ex29, the air outlet has an equivalent diameter of 0.1 mm to 3 mm.

[0582] Example Ex31. An aerosol generating article, wherein in any one of Ex1 to Ex30, the air outlet has an equivalent diameter of 0.4 mm or more.

[0583] Example Ex32. An aerosol generating article, wherein in any one of Ex1 to Ex31, the air outlet has an equivalent diameter of 1 mm or more. Brief explanation of the drawing

[0584] Now, embodiments will be further described with reference to the drawings. FIG. 1 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 2 shows an exploded perspective view of the aerosol generating article of FIG. 1; FIG. 3 shows an exploded perspective view of an aerosol generating article according to the present disclosure; FIG. 4 shows a cross-sectional view of the aerosol-generating article of FIG. 3; FIG. 5 shows a longitudinal cross-sectional view of the aerosol-generating article of FIG. 3; FIG. 6 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 7 shows a perspective view of the aerosol-generating article of FIG. 6; FIG. 8 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 9 shows an exploded perspective view of the aerosol generating article of FIG. 18; FIG. 10 shows an exploded perspective view of the aerosol generating article of FIG. 8; FIG. 11 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 12 shows an exploded perspective view of the aerosol generating article of FIG. 11; FIG. 13 shows an exploded perspective view of the aerosol generating article of FIG. 11; FIG. 14 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 15 shows an exploded perspective view of the aerosol generating article of FIG. 14; FIG. 16 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 17 shows an exploded perspective view of the aerosol generating article of FIG. 15; FIG. 18 shows an exploded perspective view of an aerosol-generating article according to the present disclosure; FIG. 19 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 20 shows a perspective view of the aerosol-generating article of FIG. 21; FIG. 21 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 22 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 23 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 24 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 25 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 26 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 27 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 28 shows an exploded perspective view of the aerosol generating article of FIG. 27; FIG. 29 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 30 shows a perspective view of an aerosol-generating article according to the present disclosure; FIG. 31 shows an exploded perspective view of the aerosol generating article of FIG. 30; FIG. 32 shows a schematic cross-sectional view of an aerosol generating device according to the present disclosure; FIG. 33 shows a schematic cross-sectional view of the aerosol generating device of FIG. 32 engaged with the aerosol generating article of the present disclosure; FIG. 34 shows a schematic cross-sectional view of an aerosol generating device according to the present disclosure; FIG. 35 shows a schematic cross-sectional view of the aerosol generating device of FIG. 34 engaged with the aerosol generating article of the present disclosure; Specific details for implementing the invention

[0585] FIG. 1 shows an aerosol generating article (10) comprising opposing discrete upper and lower outer walls. In this embodiment, the upper outer wall comprises a first planar outer layer (24) forming a first planar outer surface (21), and the lower outer wall comprises a second planar outer layer (25) forming a second planar outer surface (22).

[0586] In the aerosol generating article (10) of FIG. 1, the first outer layer (24) and the second outer layer (25), and consequently the first outer surface (21) and the second outer surface (22), are planar. In other examples, the first outer layer (24) and the second outer layer (25), and consequently the first outer surface (21) and the second outer surface (22), may not be planar.

[0587] The aerosol generating article (10) has a cavity (30). The cavity (30) is located between the upper outer wall and the lower outer wall. In the embodiment of FIG. 1, the cavity (30) is located between the first planar outer layer (24) and the second planar outer layer (25).

[0588] In the embodiment of FIG. 1, the aerosol generating article (10) includes a frame (50) located between a first planar outer layer (24) and a second planar outer layer (25). Both the first planar outer layer (24) and the second planar outer layer (25) include an aerosol generating substrate comprising an aerosol generating material, namely tobacco. However, it will be understood that in some embodiments, only one of the first planar outer layer (24) and the second planar outer layer (25) may include an aerosol generating substrate. Alternatively or additionally, the aerosol generating substrate may be located elsewhere within the aerosol generating article (10).

[0589] The aerosol generating article (10) has an article length extending in the x-direction, an article width extending in the y-direction, and an article thickness extending in the z-direction. In an embodiment, the aerosol generating article (10) has a length of 30 mm, a width of 10 mm, and a thickness of 3.1 mm.

[0590] The upper outer wall and the lower outer wall extend in the x and y directions. In the embodiment of FIG. 1, the first planar outer surface (21) and the second planar outer surface (22) extend in the x and y directions. That is, the first planar outer surface (21) and the second planar outer surface (22) extend in the x / y plane. The first planar outer surface (21) is positioned parallel to the second planar outer surface (22), and the first planar outer surface (21) is spaced apart from the second planar outer surface (22) in the z direction or transverse direction. The distance between the first planar outer surface (21) and the second planar outer surface (22) in the z direction or transverse direction corresponds to the thickness of the aerosol generating article (10).

[0591] In the embodiment of FIG. 1, the aerosol generating article (10) is a substantially flat aerosol generating article or a substantially planar aerosol generating article. In particular, the thickness of the aerosol generating article (10) is less than 50% of both the length and width of the aerosol generating article. That is, the thickness is less than 15 mm (less than 50% of the length of the aerosol generating article (10)) and less than 5 mm (less than 50% of the width of the aerosol generating article (10). The aerosol generating article (10) generally has a rectangular cuboid shape and has a laminated structure formed by a first planar outer layer (24), a frame (50), and a second planar outer layer (25). The first planar outer layer (24), the frame (50), and the second planar outer layer (25) are bonded together using an adhesive, in particular guar gum, as will be discussed in more detail below in relation to FIG. 2.

[0592] FIG. 2 shows an exploded view of the aerosol generating article (10) of FIG. 1.

[0593] The frame (50) has a length of 30 millimeters, a width of 10 millimeters, and a thickness of 2.7 millimeters. The frame (50) is made of cardboard and defines a frame aperture that extends through the thickness of the frame (50). The frame aperture forms at least partially a cavity (30). The cavity (30) has a length of 26 millimeters, a width of 6 millimeters, and a thickness of 2.7 millimeters. Thus, the cavity (30) has a volume of approximately 421.2 cubic millimeters. In this embodiment, the cavity (30) is substantially empty.

[0594] The frame (50) has an inner frame surface (52) extending in the z-direction or transverse direction between the first planar outer surface (21) and the second planar outer surface (22). The inner frame surface (52) defines a cavity outer wall. The frame (50) has an outer frame surface (53) extending in the z-direction or transverse direction between the first planar outer surface (21) and the second planar outer surface (22). The outer frame surface (53) at least partially defines one or more outer surfaces of an aerosol generating article, such as a front wall (13) and a rear wall (14). The outer frame surface (53) surrounds the inner frame surface (52) and is concentric with it. Thus, the frame (50) has a cross-section in the x / y plane that is circular in shape, and in particular, the cross-section is a rectangular circular shape.

[0595] The frame (50) includes a perimeter wall (51) surrounding the cavity (30). More specifically, the perimeter wall (51) is defined by the frame inner surface (52) and the frame outer surface (53). The perimeter wall (51) has a radial thickness of about 2 millimeters when measured between the frame inner surface (52) and the frame outer surface (53) in the x / y plane.

[0596] The first planar outer layer (24) and the second planar outer layer (25) have a thickness of 200 micrometers and are in physical contact with the frame (50). The first planar outer layer (24) and the second planar outer layer (25) are bonded to the frame using an adhesive (15). The first planar outer layer (24) is placed over the end of the cavity (30) and forms the first cavity end wall (31). The second planar outer layer (25) is placed over the opposite end of the cavity (30) and forms the second cavity end wall (32). That is, the frame (50), the first planar outer layer (24), and the second planar outer layer (25) collectively define the cavity (30).

[0597] The air inlet (11) and air outlet (12) are defined by and extend through the peripheral wall (51) of the frame (50). The air inlet (11) and air outlet (12) each have a rectangular cross-section, a width of 2 millimeters, and a thickness of 0.9 millimeters. An airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12).

[0598] In the aerosol generating article of FIG. 1, the airflow passage has a length of approximately 31.5 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 1.05. A long airflow passage is provided in the aerosol generating article of FIG. 1 by the air inlet (11) and the air outlet (12) being offset from each other with respect to the central longitudinal axis of the aerosol generating article (10).

[0599] FIG. 3 illustrates an exploded view of an aerosol generating article similar to the aerosol generating article (10) of FIG. 1, except that the first planar outer layer (24) and the second planar outer layer (25) do not contain an aerosol generating substrate. Instead, the aerosol generating substrate (40) is located within the cavity (30). The aerosol generating substrate (40) contains an aerosol generating material in the form of a tobacco stick and has an aerosol forming agent content of 5 weight percent based on dry weight. As illustrated, the aerosol generating substrate (40) fills the entire volume of the cavity (30). In the embodiment of FIG. 3, the aerosol generating substrate (40) has a packing density of about 0.87, a density of about 0.3 g / cm³, and a mass of about 110 mg. In other examples, the aerosol generating substrate (40) may have a different packing density, a different density, and a different mass. For example, the aerosol generating material may have a packing density of 0.64, a density of 0.35 grams per cubic centimeter, and a mass of about 95 milligrams.

[0600] The airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIG. 3, the airflow passage has a length of approximately 31.5 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 1.05. A long airflow passage is provided in the aerosol generating article of FIG. 3 by the air inlet (11) and the outlet (12) being offset from each other with respect to the central longitudinal axis of the aerosol generating article (10).

[0601] Figures 4 and 5 show cross-sectional views in the transverse and longitudinal directions of the aerosol generating article of Figure 3, respectively.

[0602] FIG. 6 illustrates an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 1 and FIG. 3, except that the aerosol generating article (10) of FIG. 6 includes an outer wrapper (23) defining opposite upper and lower walls instead of a first planar outer layer (24) and a second planar outer layer (25).

[0603] The airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIG. 6, the airflow passage has a length of approximately 31.5 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 1.05. A long airflow passage is provided in the aerosol generating article of FIG. 6 by the air inlet (11) and the outlet (12) being offset from each other with respect to the central longitudinal axis of the aerosol generating article (10).

[0604] FIG. 7 shows, for example, an unwrapped aerosol generating article (10) of FIG. 6, such that the outer wrapper (23) exposes a portion of the surrounding wall (51) of the frame (50). The outer wrapper (23) may be cigarette paper.

[0605] FIG. 8 shows an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 1, except that the frame (50) of the aerosol generating article (10) of FIG. 8 includes a first frame layer (54) and a second frame layer (55). FIG. 9 shows an exploded view of the first planar outer layer (24), frame (50), and second planar outer layer (25) of the aerosol generating article (10) of FIG. 8. FIG. 10 shows another exploded view of the first planar outer layer (24), first frame layer (54), second frame layer (55), and second planar outer layer (25) of the aerosol generating article (10) of FIG. 8.

[0606] The first planar outer layer (24) is physically in contact with the first frame layer (54) and bonded together with an adhesive (15). The first frame layer (54) is physically in contact with the second frame layer (55) and bonded together with an adhesive (15). The second planar outer layer (25) is physically in contact with the second frame layer (55) and bonded together with an adhesive (15).

[0607] The aerosol generating article (10) of FIG. 8 has the same dimensions as the aerosol generating article (10) of FIG. 1. The frame (50) has the same dimensions as the frame (50) of FIG. 1. The thickness of the frame (50) is equal to the sum of the thicknesses of the first frame layer (54) and the second frame layer (55), and all of them have the same thickness. The air inlet (11) and the air outlet (12) are formed by both the first frame layer (54) and the second frame layer (55).

[0608] The air inlet (11) and the air outlet (12) extend to the center through the respective longitudinal end walls of the frame (50) and extend through both the first frame layer (54) and the second frame layer (55). The air inlet (11) and the air outlet (12) each have a rectangular cross-section.

[0609] The airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIGS. 8 to 10, the airflow passage has a length of about 31.5 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 1.05.

[0610] A long airflow passage is provided in the aerosol generating article of FIGS. 8 to 10 by providing an airflow passage obstruction. In the embodiment of FIGS. 8 to 10, the airflow passage obstruction is an airflow passage wall (57) located within the cavity to obstruct the air flowing through the airflow passage. The airflow passage wall (57) has a rectangular shape and extends vertically from the inner surface of the first planar outer layer (24) to the inner surface of the second planar outer layer (25). A gap is provided between the lateral edge of the airflow passage wall (57) and the inner surface of the frame so that air can flow through the airflow passage between the air inlet (11) and the air outlet (12). Accordingly, the airflow passage wall (57) substantially prevents air from flowing in a straight line between the air inlet (11) and the air outlet (12). Instead, in the embodiments of FIGS. 8 to 10, the air flowing through the airflow passage must take a longer path between the air inlet (11) and the air outlet (12).

[0611] FIG. 11 shows an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 11, except that the frame (50) of the aerosol generating article (10) of FIG. 11 includes a first frame layer (54), a second frame layer (55), and a third frame layer (56) located between the first frame layer (54) and the second frame layer (55). FIG. 12 shows an exploded view of the first planar outer layer (24), the frame (50), and the second planar outer layer (25) of the aerosol generating article (10) of FIG. 11. FIG. 13 shows another exploded view of the first planar outer layer (24), the first frame layer (54), the second frame layer (55), the third frame layer (56), and the second planar outer layer (25) of the aerosol generating article (10) of FIG. 11.

[0612] The first planar outer layer (24) is physically in contact with the first frame layer (54) and bonded together with an adhesive (15). The first frame layer (54) is physically in contact with the second frame layer (55) and bonded together with an adhesive (15). The second frame layer (55) is physically in contact with the third frame layer (56) and bonded together with an adhesive (15). The second planar outer layer (25) is physically in contact with the third frame layer (56) and bonded together with an adhesive (15).

[0613] The aerosol generating article (10) of FIG. 11 has the same dimensions as the aerosol generating article (10) of FIG. 1. The frame (50) has the same dimensions as the frame (50) of FIG. 1. The thickness of the frame (50) is equal to the sum of the thicknesses of the first frame layer (54), the second frame layer (55), and the third frame layer (56). The air inlet (11) and the air outlet (12) extend through the second frame layer (55).

[0614] The air inlet (11) and the air outlet (12) extend to the center through the respective longitudinal end walls of the frame (50) and through the second frame layer (55). The air inlet (11) and the air outlet (12) each have a rectangular cross-section.

[0615] The airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIGS. 11 to 13, the airflow passage has a length of about 36 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 1.2.

[0616] A long airflow passage is provided in the aerosol generating article of FIGS. 11 to 13 by a plurality of airflow passage walls (57) located within the cavity to obstruct the air flowing through the airflow passage. Each airflow passage wall (57) has a rectangular shape and extends vertically from the inner surface of the first planar outer layer (24) to the inner surface of the second planar outer layer (25). A gap is provided between one lateral edge of each airflow passage wall (57) and the inner surface of the frame so that air can flow through the airflow passage between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIGS. 8 to 10, two airflow passage walls (57) extend from opposing lateral sides of the article, which create an S-shaped airflow passage between the air inlet (11) and the air outlet (12). The airflow passage wall (57) accordingly prevents air from flowing in a straight line between the air inlet (11) and the air outlet (12). Instead, in the aerosol generating article of FIGS. 11 to 13, the air flowing through the airflow passage must take a longer, winding path between the air inlet (11) and the air outlet (12).

[0617] FIG. 14 illustrates an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 1, except that the aerosol generating article (10) of FIG. 14 further comprises a first aerosol generating substrate layer (41) and a second aerosol generating substrate layer (42). FIG. 15 illustrates an exploded view of the aerosol generating article (10) of FIG. 14. The first aerosol generating substrate layer (41) and the second aerosol generating substrate layer (42) are formed from sheets of an aerosol generating material. In particular, the sheets of homogenized tobacco material have an aerosol forming agent content of 5 weight percent based on dry weight. The first aerosol generating substrate layer (41) and the second aerosol generating substrate layer (42) each have a length equal to the length of the aerosol generating article (10), a width equal to the width of the aerosol generating article (10), and a thickness of 200 micrometers. That is, the aerosol generating article (10) has a length of 30 mm, a width of 10 mm, and a thickness of 3.5 mm.

[0618] The first aerosol generating substrate layer (41) and the second aerosol generating substrate layer (42) are in physical contact with the frame (50) and are bonded to the frame with an adhesive (15). The first aerosol generating substrate layer (41) is placed over the end of the cavity (30) and forms the first cavity end wall (31). The second aerosol generating layer (42) is placed over the opposite end of the cavity (30) and forms the second cavity end wall (32). That is, the frame (50), the first aerosol generating substrate layer (41), and the second aerosol generating substrate layer (42) collectively define the cavity (30).

[0619] The first planar outer layer (24) is physically in contact with the first aerosol generating substrate layer (41) and bonded together with an adhesive (15). The second planar outer layer (25) is physically in contact with the second aerosol generating substrate layer (42) and bonded together with an adhesive (15).

[0620] The frame (50) is shown as a single component. However, the frame may be a two-layer frame as shown in FIG. 8 or a three-layer frame as shown in FIG. 11.

[0621] The air inlet (11) and the air outlet (12) extend to the center through the respective longitudinal end walls of the frame (50). The air inlet (11) and the air outlet (12) each have a rectangular cross-section.

[0622] The airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIGS. 14 and 15, the airflow passage has a length of about 45 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 1.5.

[0623] A long airflow passage is provided to the aerosol generating article of FIG. 14 and FIG. 15 by a plurality of airflow passage walls (57) located within the cavity to obstruct the air flowing through the airflow passage. Each of the airflow passage walls (57) has a rectangular shape and extends vertically from the inner surface of the first aerosol generating substrate layer (41) to the inner surface of the second aerosol generating substrate layer (42). A gap is provided between the lateral edge of each airflow passage wall (57) and the inner surface of the frame so that air can flow through the airflow passage between the air inlet (11) and the air outlet (12).

[0624] In the aerosol generating article of FIGS. 14 and 15, the airflow passage walls (57) are spaced apart from each other and alternately extend laterally from the opposing inner surfaces of the peripheral walls of the frame (50). The arrangement of the airflow passage walls (57) substantially prevents air from flowing in a straight line between the air inlet (11) and the air outlet (12). Instead, in the embodiment of FIGS. 14 and 15, the air flowing through the airflow passage must take a long, winding path between the air inlet (11) and the air outlet (12).

[0625] In another embodiment, the aerosol generating article (10) is similar to the aerosol generating article of FIGS. 14 to 16, but the first aerosol generating substrate layer (41) and the second aerosol generating substrate layer (42) are external surfaces, and the first planar outer layer 21 and the second planar outer layer (25) are omitted.

[0626] FIG. 16 illustrates an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 14 and FIG. 15, except that the arrangement of the aerosol generating walls (57) is different from the arrangement within the aerosol generating article of FIG. 14 and FIG. 15. FIG. 17 illustrates an exploded view of the aerosol generating article (10) of FIG. 16.

[0627] The air inlet (11) and the air outlet (12) extend through the respective longitudinal end wall of the frame (50). The air inlet (11) and the air outlet (12) each have a rectangular cross-section and are positioned opposite to a location offset from the central longitudinal axis of the aerosol generating article.

[0628] The airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIGS. 16 and 17, the airflow passage has a length of about 75 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 2.5.

[0629] A long airflow passage is provided to the aerosol generating article of FIGS. 16 and 17 by a plurality of airflow passage walls (57) positioned within the cavity to obstruct the air flowing through the airflow passage. Each of the airflow passage walls (57) has a rectangular shape and extends vertically from the inner surface of the first aerosol generating substrate layer (41) to the inner surface of the second aerosol generating substrate layer (42). A gap is provided between the longitudinal edge of each airflow passage wall (57) and the inner surface of the frame so that air can flow through the airflow passage between the air inlet (11) and the air outlet (12).

[0630] In the aerosol generating article of FIGS. 16 and 17, the airflow passage walls (57) are spaced apart from each other and extend alternately and longitudinally from the opposing inner surfaces of the peripheral walls of the frame (50). The arrangement of the airflow passage walls (57) substantially prevents air from flowing in a straight line between the air inlet (11) and the air outlet (12). Instead, in the example of FIGS. 16 and 17, the air flowing through the airflow passage must take a long, winding path between the air inlet (11) and the air outlet (12).

[0631] FIG. 18 illustrates an exploded view of an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 16, except that the aerosol generating substrate (40) is located within the cavity (30) as described in relation to FIG. 3. The aerosol generating substrate (40) comprises an aerosol generating material in the form of a tobacco stick and has an aerosol forming agent content of 5 weight percent based on dry weight. As illustrated, the aerosol generating substrate (40) fills the entire volume of the cavity (30).

[0632] The air inlet (11) and the air outlet (12) extend to the center through the respective longitudinal end walls of the frame (50). The air inlet (11) and the air outlet (12) each have a rectangular cross-section.

[0633] The airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIG. 18, the airflow passage has a length of about 36 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 1.2.

[0634] A long airflow passage is provided to the aerosol generating article of FIG. 18 by a plurality of airflow passage walls (57) positioned within the cavity to obstruct the air flowing through the airflow passage. Each of the airflow passage walls (57) has a rectangular shape and extends vertically from the inner surface of the first aerosol generating substrate layer (41) to the inner surface of the second aerosol generating substrate layer (42). A gap is provided between the lateral edge of each airflow passage wall (57) and the inner surface of the frame so that air can flow through the airflow passage between the air inlet (11) and the air outlet (12).

[0635] In the aerosol generating article of FIG. 18, the airflow passage walls (57) are spaced apart from each other and extend alternately and laterally from the opposing inner surfaces of the peripheral walls of the frame (50). The arrangement of the airflow passage walls (57) substantially prevents air from flowing in a straight line between the air inlet (11) and the air outlet (12). Instead, in the embodiment of FIG. 18, the air flowing through the airflow passage must take a long, winding path between the air inlet (11) and the air outlet (12).

[0636] FIG. 19 illustrates an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 14, except that the aerosol generating article (10) of FIG. 19 includes an outer wrapper (23) defining upper and lower outer walls instead of a first planar outer layer (24) and a second planar outer layer (25). FIG. 20 shows the aerosol generating article (10) of FIG. 19 unwrapped so that the outer wrapper (23) exposes a portion of the peripheral wall (51) of the frame (50) for example. The outer wrapper (23) may be cigarette paper.

[0637] FIG. 21 shows an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 1, except that the air inlet (11) and the air outlet (12) are arranged differently from the aerosol generating article of FIG. 1.

[0638] In the aerosol generating article (10) of FIG. 21, the air inlet (11) and the air outlet (12) are both located in the center with respect to the width of the aerosol generating article (10).

[0639] The air outlet (12) extends through the longitudinal end wall of the frame (50), and the air inlet (11) extends through the first planar outer layer (24). In another example, the air inlet (11) extends through the longitudinal end wall of the frame (50), and the air outlet (12) extends through the first planar outer layer (24). In another embodiment, instead of extending through the first planar outer layer (24), the air inlet (11) or the air outlet (12) extends through the second planar outer layer (25).

[0640] FIG. 22 shows an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 6, except that the air inlet (11) and the air outlet (12) are arranged differently from the aerosol generating article of FIG. 6.

[0641] In the aerosol generating article (10) of FIG. 22, the air inlet (11) and the air outlet (12) are both located in the center with respect to the width of the aerosol generating article (10).

[0642] The air outlet (12) extends through the longitudinal end wall of the frame (50), and the air inlet (11) extends through the first planar outer surface (21). In another embodiment, the air inlet (11) extends through the longitudinal end wall of the frame (50), and the air outlet (12) extends through the first planar outer surface (21). In another embodiment, instead of extending through the first planar outer surface (21), the air inlet (11) or the air outlet (12) extends through the second planar outer surface (22).

[0643] FIG. 23 shows an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 14, except that the air inlet (11) and air outlet (12) are arranged differently from the aerosol generating article of FIG. 14.

[0644] In the aerosol generating article (10) of FIG. 23, the air inlet (11) and the air outlet (12) are both located in the center with respect to the width of the aerosol generating article (10).

[0645] The air outlet (12) extends through the longitudinal end wall of the frame (50), and the air inlet (11) extends through the first planar outer layer (24) and the first aerosol generating substrate layer (41). In another embodiment, the air inlet (11) extends through the longitudinal end wall of the frame (50), and the air outlet (12) extends through the first planar outer layer (24) and the first aerosol generating substrate layer (41). In another embodiment, instead of extending through the first planar outer layer (24) and the first aerosol generating substrate layer (41), the air inlet (11) or the air outlet (12) extends through the second planar outer layer (25) and the second aerosol generating substrate layer (42).

[0646] In another embodiment, the aerosol generating article (10) is similar to the aerosol generating article of FIG. 23, but the first aerosol generating substrate layer (41) and the second aerosol generating substrate layer (42) are external surfaces, and the first planar outer layer (21) and the second planar outer layer (25) are omitted.

[0647] FIG. 24 shows an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 21, except that the air inlet (11) has a circular cross-section rather than a rectangular cross-section. In another embodiment of the aerosol generating article, the air outlet (12) may have a circular cross-section rather than a rectangular cross-section. In a further embodiment of the aerosol generating article, the air inlet (11) or the air outlet may have a cross-section of a different shape.

[0648] FIG. 25 shows an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 22, except that the air inlet (11) has a circular cross-section rather than a rectangular cross-section. In another embodiment of the aerosol generating article, the air outlet (12) may have a circular cross-section rather than a rectangular cross-section. In a further embodiment of the aerosol generating article, the air inlet (11) or the air outlet may have a cross-section of a different shape.

[0649] FIG. 26 shows an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 23, except that the air inlet (11) has a circular cross-section rather than a rectangular cross-section. In another embodiment of the aerosol generating article, the air outlet (12) may have a circular cross-section rather than a rectangular cross-section. In a further embodiment of the aerosol generating article, the air inlet (11) or the air outlet may have a cross-section of a different shape.

[0650] In another example, the aerosol generating article (10) is similar to the aerosol generating article of FIG. 26, but the first aerosol generating substrate layer (41) and the second aerosol generating substrate layer (42) are external surfaces, and the first planar outer layer 21 and the second planar outer layer (25) are omitted.

[0651] FIG. 27 illustrates an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 26. FIG. 28 illustrates an exploded view of the aerosol generating article (10) of FIG. 27.

[0652] In contrast to the aerosol generating article of FIG. 26, in the aerosol generating articles of FIG. 27 and FIG. 28, the air inlet (12) is an air inlet (11) offset from the central longitudinal axis of the aerosol generating article (10).

[0653] The airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIGS. 26 and 27, the airflow passage has a length of about 75 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 2.5.

[0654] A long airflow passage is provided to the aerosol generating article of FIGS. 27 and 28 by an airflow passage wall (57) located within the cavity to obstruct and divert air flowing through the airflow passage. The airflow passage wall (57) is a wall that extends vertically from the inner surface of the first aerosol generating substrate layer (41) to the inner surface of the second aerosol generating substrate layer (42). When viewed in a plane, the airflow passage wall (57) has a spiral shape. A gap is provided between the airflow passage wall (57) and the inner surface of the frame so that air can flow through the airflow passage between the air inlet (11) and the air outlet (12).

[0655] In the aerosol generating article of FIGS. 27 and 28, the arrangement of the airflow passage walls (57) substantially prevents air from flowing in a straight line between the air inlet (11) and the air outlet (12). Instead, in the embodiment of FIGS. 27 and 28, the air flowing through the airflow passage must take a long, winding path between the air inlet (11) and the air outlet (12).

[0656] FIG. 29 illustrates an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 24, except that the frame (50) has a different shape. In the aerosol generating article (10) of FIG. 29, the frame (50) has a curved longitudinal end wall. Consequently, the first outer surface (21) and the second outer surface (25) are curved rather than flat.

[0657] FIG. 30 illustrates an aerosol generating article (10) similar to the aerosol generating article (10) of FIG. 24, except that the overall shape of the aerosol generating article (10) in FIG. 30 is different. In the embodiment of FIG. 30, the aerosol generating article is substantially cylindrical and puck-shaped rather than rectangular. FIG. 31 illustrates an exploded view of the aerosol generating article (10) of FIG. 30.

[0658] The aerosol generating article (10) of FIGS. 30 and FIGS. 31 has a length of 30 mm and a thickness of 3.5 mm.

[0659] The airflow passage extends through a cavity (30) between the air inlet (11) and the air outlet (12). In the aerosol generating article of FIGS. 30 and 31, the airflow passage has a length of about 105 mm, which is greater than the length of the article. Specifically, in this embodiment, the ratio of the length of the airflow passage to the length of the aerosol generating article is 3.5.

[0660] A long airflow passage is provided to the aerosol generating article of FIG. 30 and FIG. 31 by an airflow passage wall (57) located within the cavity to obstruct and divert air flowing through the airflow passage. The airflow passage wall (57) is a wall extending vertically from the inner surface of the first aerosol generating substrate layer (41) to the inner surface of the second aerosol generating substrate layer (42). When viewed in a plane, the airflow passage wall (57) has a spiral shape. A gap is provided between the airflow passage wall (57) and the inner surface of the frame so that air can flow through the airflow passage between the air inlet (11) and the air outlet (12).

[0661] In the aerosol generating article of FIGS. 30 and 31, the arrangement of the airflow passage walls (57) substantially prevents air from flowing in a straight line between the air inlet (11) and the air outlet (12). Instead, in the embodiment of FIGS. 30 and 31, the air flowing through the airflow passage must take a long, winding path between the air inlet (11) and the air outlet (12).

[0662] FIG. 32 shows a schematic cross-sectional view of an aerosol generating device (90) configured for use with the aerosol generating article (10) described herein. The aerosol generating device (90) is an elongated aerosol generating device extending between a proximal end (91) and a distal end (92). The aerosol generating device (90) includes a battery (93), a controller (94), a first heater (95), and a second heater (96) located within a housing (97). The controller (94) controls the power supply from the battery (93) to the first heater (95) and the second heater (96). A cavity (1000) is defined in the device (90), and the cavity (1000) has an opening (1010) defined at the proximal end (91) of the device (90). The opening (1010) is rectangular in shape and is dimensioned to accommodate a cross-section of the aerosol generating article (10). The cavity (1000) includes an upper planar surface (1020) and a lower planar surface (1030). A first heater (95) is located on the upper planar surface (1020) to heat the first planar outer surface (21) of an aerosol generating article (10) inserted into the cavity (1000), and a second heater (96) is located on the lower planar surface (1030) to heat the second planar outer surface (22) of an aerosol generating article (10) inserted into the cavity (1000). The device (90) includes an air inlet (98) that defines an airflow path configured to allow air to flow from outside the device into the cavity (1000).

[0663] FIG. 33 shows a schematic cross-sectional view of the aerosol generating device (90) of FIG. 32 that engages with the aerosol generating article (10) of FIG. 1. There is almost no tolerance between the first planar outer surface (21) and the second planar outer surface (22) of the aerosol generating article (10) and the inner surface (1020, 1030) of the cavity (1000). Therefore, there is a tight fit between the aerosol generating article (10) and the aerosol generating device (90). When a consumer inserts the aerosol generating article (10) into the cavity (1000), the device can be operated. The first heater (95) heats the first planar outer surface (21) of the aerosol generating article (10), and the second heater (96) heats the second planar outer surface (22) of the aerosol generating article, and as a result, the aerosol generating material is heated. The volatile components of the aerosol generating material evaporate and condense within the cavity (30) of the aerosol generating article (10) to form an aerosol. A consumer inhales the aerosol by sucking on the end of the aerosol generating article (10) which includes an air outlet (12). Once the volatile components in the aerosol generating material are depleted, the aerosol generating article (10) is removed from the cavity (1000) and disposed of.

[0664] FIG. 34 shows a schematic cross-sectional view of an aerosol generator (90) similar to the aerosol generator (90) of FIG. 32, except that the air inlet (98) is located at a different position. In the aerosol generator (90) of FIG. 34, the air inlet (98) extends vertically through the upper surface of the aerosol generator (90) to be connected to the cavity (1000). This arrangement improves fluid communication between the cavity (30) of the aerosol generator (10) having the air inlet (11) defined on its upper surface (21), as in the aerosol generator of FIG. 21 through FIG. 31, and the air inlet (98). Consequently, the first heater (95) has an annular shape to accommodate the air inlet (98).

[0665] FIG. 35 shows a schematic cross-sectional view of the aerosol generating device (90) of FIG. 34 that engages with the aerosol generating article (10) of FIG. 21. There is almost no tolerance between the first planar outer surface (21) and the second planar outer surface (22) of the aerosol generating article (10) and the inner surface (1020, 1030) of the cavity (1000). Therefore, there is a tight fit between the aerosol generating article (10) and the aerosol generating device (90). When a consumer inserts the aerosol generating article (10) into the cavity (1000), the device can be operated. The first heater (95) heats the first planar outer surface (21) of the aerosol generating article (10), and the second heater (96) heats the second planar outer surface (22) of the aerosol generating article, and as a result, the aerosol generating material is heated. The volatile components of the aerosol generating material evaporate and condense within the cavity (30) of the aerosol generating article (10) to form an aerosol. A consumer inhales the aerosol by sucking on the end of the aerosol generating article (10) which includes an air outlet (12). Once the volatile components in the aerosol generating material are depleted, the aerosol generating article (10) is removed from the cavity (1000) and disposed of.

[0666] Advantageously, providing an airflow path longer than the length of the aerosol generating article to the aerosol generating article can increase contact between the aerosol generating material and the air flowing through the airflow path.

[0667] Advantageously, increasing the contact between the aerosol generating material and the air flowing through the airflow passage can increase the extraction of components of the aerosol generating material, such as nicotine, and aerosol forming agents, such as glycerin. Increasing the extraction of nicotine from the aerosol generating material can improve the user experience provided by the aerosol generating article.

[0668] For example, the inventors have discovered that increasing the length of the airflow passage to be longer than the length of the aerosol generating article can increase the extraction of nicotine from the aerosol generating substrate and increase the extraction of an aerosol forming agent from the aerosol generating substrate.

[0669] Advantageously, increasing the contact between the aerosol generating material and the air flowing through the airflow passage can enable a faster first puff. That is, the time from when a user activates the aerosol generating device until the aerosol generating item becomes available for use can be reduced.

[0670] Aerosol-generating articles are typically stored with their longitudinal axis perpendicular. This configuration allows more aerosol-generating articles to be stored in the container.

[0671] Advantageously, by providing at least one of an air inlet and an air outlet on a first planar outer layer or a second planar outer layer, an aerosol generating article that can be stored such that the downward-facing surface does not have an opening defining the air inlet or the air outlet. This configuration can reduce the risk of the aerosol generating material falling out of the aerosol generating article through the air inlet or the air outlet.

[0672] Advantageously, providing at least one of an air inlet and an air outlet in the first planar outer layer or the second planar outer layer can provide improved fluid communication between the cavity of the aerosol generating article and the air inlet of the aerosol generating device.

[0673] Advantageously, by providing at least one of an air inlet and an air outlet in the first planar outer layer or the second planar outer layer, it is easier to form the air inlet or air outlet through a larger surface than through a smaller surface, thereby enabling a manufacturing process with reduced complexity.

[0674] For the purposes of this description and the appended claims, unless otherwise indicated, all numbers expressing amounts, quantities, percentages, etc., shall be understood in all cases to be modified by the term “about.” Additionally, all ranges include the disclosed maximum and minimum points and contain any intermediate ranges that may or may not be specifically enumerated herein. Accordingly, in this context, the number A is understood as 10% of A ± A. In this context, the number A may be considered to include numerical values ​​within the general standard error for measuring the characteristic that the number A modifies. In some examples used in the appended claims, the number A may deviate by the aforementioned percentages, provided that the amount of deviation from A does not substantially affect the basic and novel feature(s) of the claimed invention. Additionally, all ranges include the disclosed maximum and minimum points and contain any intermediate ranges that may or may not be specifically enumerated herein.

Claims

Claim 1 An aerosol generating article for generating an aerosol by use with an aerosol generating device, wherein the aerosol generating article comprises: a first planar outer surface; a second planar outer surface; a cavity; a frame positioned between the first planar outer surface and the second planar outer surface, wherein the frame at least partially defines the cavity; one or more aerosol generating materials; and an air inlet, an air outlet, and an airflow passage extending through the cavity between the air inlet and the air outlet, wherein the air inlet or the air outlet extends through the first planar outer surface or the second planar outer surface, and wherein the frame comprises a cellulose material. Claim 2 In claim 1, the air inlet extends through the first planar outer surface, an aerosol generating article. Claim 3 An aerosol generating article according to claim 1 or 2, wherein the air inlet extends through the second planar outer surface. Claim 4 An aerosol generating article according to any one of claims 1 to 3, wherein the air outlet extends through the first planar outer surface. Claim 5 An aerosol generating article according to any one of claims 1 to 3, wherein the air outlet extends through the second planar outer surface. Claim 6 An aerosol generating article according to any one of claims 1 to 5, wherein the frame comprises a surrounding wall that surrounds or encloses the cavity. Claim 7 In paragraph 6, the air inlet extends through the surrounding wall, an aerosol generating article. Claim 8 In paragraph 6, the air outlet is an aerosol generating article that extends through the surrounding wall. Claim 9 An aerosol generating article according to any one of claims 1 to 8, wherein the air inlet or the air outlet has a round cross-section, a circular cross-section, an oval cross-section, a square cross-section, or a rectangular cross-section. Claim 10 An aerosol generating article according to any one of claims 1 to 9, wherein the air inlet is located at the center with respect to the length of the first planar outer surface or the second planar outer surface. Claim 11 An aerosol generating article according to any one of claims 1 to 10, wherein the air inlet is located at the center with respect to the width of the first planar outer surface or the second planar outer surface. Claim 12 An aerosol generating article according to any one of claims 1 to 11, wherein the air outlet is located at the center with respect to the length of the first planar outer surface or the second planar outer surface. Claim 13 An aerosol generating article according to any one of claims 1 to 12, wherein the air outlet is located at the center with respect to the width of the first planar outer surface or the second planar outer surface. Claim 14 An aerosol generating article according to any one of claims 1 to 13, wherein the air inlet has an equivalent diameter of 1 mm or more. Claim 15 An aerosol generating article according to any one of claims 1 to 14, wherein the air outlet has an equivalent diameter of 1 mm or more.

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