Aerosol generating substrate and aerosol generating product

Abstract

The invention relates to the technical field of aerosol generation, and provides an aerosol generation matrix and an aerosol generation product, the aerosol generation matrix comprises a base material and a phase change material, the base material is heated to generate aerosol, and the phase change material is heated to be gasified so that gaps can be formed in the base material. The phase change material is heated and gasified, so that the space occupied by the solid phase change material in the substrate is released to form a gap, the porosity of the aerosol generation substrate can be improved, and the draw resistance is reduced. Aerosol generated by the base material can enter the gaps, so that effective components in the base material can be quickly extracted.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and in particular to an aerosol generating substrate and an aerosol generating product. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the application that are recited in the claims. No description herein is admitted to be prior art by inclusion in this section.

[0003] The aerosol-generating substrate can form an aerosol by ignition or by heating without burning. Taking the aerosol-generating substrate that is heated without burning as an example, the aerosol-generating substrate is heated by an external heat source so that the aerosol-generating substrate is just heated to a degree sufficient to emit an aerosol, and the aerosol-generating substrate does not burn. When used, the aerosol-generating substrate is heated to release the aerosol.

[0004] In the related art, the aerosol-generating matrix has a large suction resistance, and the problem of suction difficulty may occur during the suction process. Summary of the invention

[0005] In view of this, the embodiments of the present application hope to provide an aerosol-generating substrate and an aerosol-generating product that can reduce the puff resistance.

[0006] To achieve the above objectives, an embodiment of the present application provides an aerosol generating matrix, including a substrate and a phase change material, wherein the substrate generates an aerosol when heated, and the phase change material vaporizes when heated to form gaps in the substrate.

[0007] In some embodiments, the phase change material includes at least one of polyethylene glycol, chitosan, gelatin, wax, starch and konjac glucomannan.

[0008] In some embodiments, at least one of sodium alginate, fatty acid, polylactic acid and flavors is doped into the phase change material.

[0009] In some embodiments, the substrate includes plant material and glycerol.

[0010] In some embodiments, the plant material is in the form of flakes, strips or powder.

[0011] In some embodiments, the mass ratio of the plant material in the substrate, the glycerol in the substrate, the propylene glycol in the substrate and the phase change material is 1:(0.05-0.4):(0-0.1):(0.1-1).

[0012] In some embodiments, the substrate includes propylene glycol, and the aerosol generating matrix is ​​formed by mixing the plant material, the glycerol, the propylene glycol and the phase change material and then extruding the mixture.

[0013] In some embodiments, the substrate includes propylene glycol, the plant material, glycerol and propylene glycol in the substrate are mixed to form a first mixture, the phase change material and glycerol are mixed to form a second mixture, and the aerosol generating matrix is ​​formed by layered extrusion of the first mixture and the second mixture.

[0014] In some embodiments, the temperature range of the substrate to generate aerosol when heated is 150°C to 400°C; the phase change temperature of the phase change material when heated is 80°C to 160°C.

[0015] In some embodiments, the voids include micropores.

[0016] In some embodiments, the hydraulic diameter of the micropores is 0.1 nm to 30 μm.

[0017] In some embodiments, the gap comprises an air channel, and the air channel passes through at least one end surface of the substrate in the longitudinal direction.

[0018] In some embodiments, the hydraulic diameter of the airway is 0.05 mm to 6 mm.

[0019] In some embodiments, the density of the aerosol-generating substrate after the phase change material is vaporized is 0.1 g / cm 3 Up to 0.4g / cm 3 .

[0020] An embodiment of the present application provides an aerosol generating product, comprising a functional segment and any one of the above-mentioned aerosol generating substrates, wherein the functional segment is arranged at one end of the aerosol generating substrate along the longitudinal direction.

[0021] The aerosol generating matrix provided in the embodiment of the present application, the phase change material is vaporized by heat, thereby releasing the space occupied by it in the solid state in the substrate to form voids, which can increase the porosity of the aerosol generating matrix and reduce the inhalation resistance. On the one hand, in the process of heating the aerosol generating matrix, before the phase change material is vaporized, the phase change material makes the temperature of the aerosol generating matrix uniform through heat conduction, the substrate generates aerosol and the phase change material is vaporized by heat to form voids, and the aerosol generated by the substrate can enter the voids, which can promote the rapid extraction of effective ingredients in the substrate; on the other hand, the vaporization process of the phase change material is an endothermic process, which can not only improve the temperature uniformity of the aerosol generating matrix through the thermal conductivity of the phase change material, but also reduce the temperature of the generated aerosol. On the other hand, the smoke formed by the vaporization of the phase change material can increase the amount of aerosol, thereby improving the inhalation experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of an aerosol generating product in one embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the structure of the first aerosol generating matrix after the phase change material is gasified in one embodiment of the present application;

[0024] Figure 3 for Figure 2 A schematic diagram of the structure from another perspective of the structure shown;

[0025] Figure 4 for Figure 3 Schematic cross-sectional view along the AA direction;

[0026] Figure 5 for Figure 2 A schematic cross-sectional view of the first aerosol generating substrate before the phase change material is vaporized;

[0027] Figure 6 This is a schematic diagram of the structure of the second aerosol generating matrix after the phase change material is gasified in one embodiment of the present application;

[0028] Figure 7 is a cross-sectional schematic diagram of a third aerosol generating matrix in an embodiment of the present application before the phase change material is gasified;

[0029] Figure 8 It is a schematic cross-sectional view of the third aerosol generating matrix after the phase change material is gasified.

[0030] Description of Reference Numerals

[0031] Aerosol generating matrix 100; channel 100a; substrate 1; phase change material 2; gap 2a; micropore 2ab; air channel 2ac; functional segment 200; wrapping layer 300. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0033] In this application, a plurality includes two and more than two. The unit "mm" is millimeter. The unit "μm" is micrometer. The unit "nm" is nanometer. The unit "℃" is Celsius. The unit "g / cm 3 ” is grams per cubic centimeter.

[0034] See also Figures 2 to 5The aerosol generating matrix 100 provided in the embodiment of the present application includes a substrate 1 and a phase change material 2. The substrate 1 generates an aerosol when heated, and the phase change material 2 vaporizes when heated to form a gap 2a in the substrate 1. The substrate 1 is solid. Specifically, the phase change material 2 vaporizes when heated to form a gap 2a where the phase change material 2 is located.

[0035] The substrate 1 may undergo a physical state change and / or chemical reaction to generate an aerosol when heated. Exemplarily, the substrate 1 may be suitable for generating aerosols by heating without burning. That is, the substrate 1 is heated below the ignition point to generate an aerosol. The substrate 1 does not burn during the process of generating an aerosol. In some application scenarios, the substrate 1 may be suitable for generating aerosols by ignition. The substrate 1 of the present application is more suitable for generating aerosols by heating without burning.

[0036] Exemplarily, the phase change material 2 changes from a solid state to a gaseous state when heated. That is, when the phase change material 2 is heated, a physical state change from a solid state to a gaseous state occurs. The phase change material 2 is heated and vaporized, so that the location of the phase change material 2 becomes a gap 2a, that is, the gap 2a is formed during the use of the aerosol generating matrix 100 during the suction, rather than during the manufacturing process of the aerosol generating matrix 100. In this way, before the aerosol generating matrix 100 is heated, the phase change material 2 is in a solid state, and after the aerosol generating matrix 100 is heated, the phase change material 2 is heated and vaporized, and the substrate 1 forms a gap 2a.

[0037] It should be understood that the phase change material 2 can undergo a solid-liquid-gas phase change or a solid-gas phase change. The aerosol generating substrate 100 is heated to a preset temperature to generate an aerosol, and the phase change material 2 can be vaporized within the preset temperature to generate the gap 2a. In other words, the phase change temperature of the phase change material 2 is not higher than the temperature at which the substrate 1 is heated to generate an aerosol.

[0038] Exemplarily, the preset temperature for heating the aerosol generating substrate 100 to generate the aerosol is between 150° C. and 400° C., for example, about 300° C., and the phase change temperature of the phase change material 2 is not higher than 300° C. The phase change material 2 can undergo different degrees of phase change according to the heating temperature. When the heating temperature is high, the phase change material 2 has a high degree of gasification, thereby increasing the porosity and reducing the aerosol temperature; when the heating temperature is low, the phase change material 2 can also make the temperature of the substrate 1 uniform through its own thermal conductivity.

[0039] In the aerosol-generating matrix 100 provided in the embodiment of the present application, the phase change material 2 is heated and vaporized, thereby releasing the space occupied by the phase change material 2 in the solid state in the substrate 1 to form a void 2a, which can increase the porosity of the aerosol-generating matrix 100 and reduce the inhalation resistance. On the one hand, in the process of heating the aerosol-generating matrix 100, before the phase change material 2 is vaporized, the phase change material 2 makes the temperature of the aerosol-generating matrix 100 uniform through heat conduction, the substrate 1 generates an aerosol and the phase change material 2 is heated and vaporized to form a void 2a, and the aerosol generated by the substrate 1 can enter the void 2a, which can promote the rapid extraction of the effective ingredients in the substrate 1; on the other hand, the vaporization process of the phase change material 2 is an endothermic process, which can not only improve the temperature uniformity of the aerosol-generating matrix 100 through the thermal conductivity of the phase change material 2, but also reduce the temperature of the generated aerosol. On the other hand, the smoke formed by the vaporization of the phase change material 2 can increase the amount of aerosol, thereby improving the inhalation experience.

[0040] See also Figure 1 and Figure 2 An embodiment of the present application provides an aerosol generating product, which includes a functional segment 200 and an aerosol generating substrate 100 in any one embodiment of the present application, wherein the functional segment 200 is disposed at one end of the aerosol generating substrate 100 along the longitudinal direction.

[0041] The functional section 200 provides at least one of the functions of aerosol gathering, dilution, cooling, interception and compensation.

[0042] In some embodiments, the functional section 200 includes a filter section, and the filter section is used to filter aerosol.

[0043] For example, the filter section can block substances with target particle sizes and can also adjust the inhalation resistance. For example, the filter section can filter large-size particles similar to powdery substances. The aerosol filtered by the filter section has a higher consistency in particle size and a more delicate taste.

[0044] The aerosol generating article is used for the user to inhale the aerosol generated by the aerosol generating substrate 100. Exemplarily, one end of the aerosol generating article in the longitudinal direction faces the user, and the user inhales to generate negative suction pressure, and the aerosol generated by the aerosol generating substrate 100 flows through the functional section 200 under the action of the negative suction pressure and is then delivered to the user. That is, the functional section 200 is downstream of the aerosol generating substrate 100 in the longitudinal direction.

[0045] The aerosol-generating article may be for use with an aerosol-generating device having a heating element.

[0046] The aerosol generating device provided in the embodiment of the present application is used for the aerosol generating product in any one of the embodiments of the present application. The aerosol generating device includes a heating element, which is used to heat the aerosol generating substrate 100 to generate an aerosol.

[0047] The heating method of the heating element includes, but is not limited to, resistance heating, electromagnetic heating, infrared heating, microwave heating or laser heating. The heat generated by the heating element can be transferred to the aerosol generating substrate 100 in the form of heat convection, heat conduction or heat radiation. The heat transfer in the form of heat convection means that the heating element is not in contact with the aerosol generating substrate 100, the heating element first heats the air, and then the hot air bakes and heats the aerosol generating substrate 100. Heat conduction means that the heating element is in contact with the aerosol generating substrate 100 (or in contact with the wrapping layer that wraps the aerosol generating substrate) and conducts heat to the aerosol generating substrate 100. Exemplarily, resistance and electromagnetic heating mainly transfer heat to the aerosol generating substrate 100 in the form of heat conduction or heat convection. Infrared heating, microwave heating or laser heating mainly transfer heat to the aerosol generating substrate 100 in the form of heat radiation. The heating element can heat the aerosol generating substrate 100 in one or more of the three forms of heat conduction, heat convection and heat radiation.

[0048] For some examples, see Figure 1 and Figure 2 The aerosol generating article includes a wrapping layer 300, which wraps around the periphery of the aerosol generating substrate 100 and the periphery of the functional segment 200. Exemplarily, the wrapping layer 300 wraps around the periphery of the aerosol generating substrate 100 and the periphery of the filter segment. The wrapping layer 300 is used to connect the aerosol generating substrate 100 and the functional segment 200 into a whole.

[0049] For example, the wrapping layer 300 may be one layer, and may be two or more layers depending on the design requirements and manufacturing process of the aerosol generating product.

[0050] For example, see Figure 2 The aerosol generating substrate 100 may be substantially cylindrical in appearance, wherein the cylindrical shape may be a cylindrical shape (i.e., a circular cross-sectional shape), a prismatic shape (i.e., a polygonal cross-sectional shape), an elliptical cylinder (i.e., an elliptical cross-sectional shape), and the like.

[0051] In the embodiment of the present application, the longitudinal direction is the direction in which the aerosol generating article is inserted into and removed from the aerosol generating device. The length of the aerosol generating substrate 100 along the longitudinal direction may be longer, shorter, or the same as the length in other directions.

[0052] For example, when the aerosol generating substrate 100 is cylindrical in appearance, the longitudinal direction is consistent with the axial direction of the cylindrical aerosol generating substrate 100. It should be noted that even if the length of the aerosol generating substrate 100 along the axial direction is less than its diameter, the longitudinal direction of the aerosol generating substrate 100 is still the axial direction. For another example, when the aerosol generating substrate 100 is rectangular in appearance, the longitudinal direction is still the direction in which the aerosol generating product is inserted into and removed from the aerosol generating device, and the longitudinal direction of the aerosol generating substrate 100 can be any direction of the length, width, and height of the rectangular parallelepiped.

[0053] It should be noted that the horizontal direction is perpendicular to the vertical direction. Taking the aerosol generating substrate 100 having a cylindrical appearance as an example, the horizontal direction is the radial direction. The cross-sectional shape is the cross-sectional shape of the aerosol generating substrate 100 with the plane perpendicular to the vertical direction as the cross-section.

[0054] In one embodiment, the phase change material 2 includes at least one of polyethylene glycol, chitosan, gelatin, wax, starch and konjac glucomannan. These materials are stable in properties when not heated (e.g., at room temperature), remain solid when not heated, and vaporize after being heated to the phase change temperature. In this way, the aerosol generating matrix 100 is stable in form during storage and transportation. These materials are vaporized to form gaps 2a after being heated to the phase change temperature, and no toxic byproducts are produced during heating and use. The phase change material 2 can replenish the aerosol amount after being vaporized.

[0055] In one embodiment, at least one of sodium alginate, fatty acid, polylactic acid and flavors is doped into the phase change material 2. Flavors are used to provide characteristic aromas. In this way, the phase change material 2 can increase the aroma of the aerosol, making the taste richer. Since the volatilization temperature of the aroma components in the flavors is low, the aroma is released in advance during the heating or preheating process, which will lead to uneven aroma release. Therefore, by coating the flavors with the phase change material 2, during the heating process, the phase change material 2 undergoes a physical state change (phase change) to release the coated flavors, thereby improving the uniformity during the use of the suction. Sodium alginate and polylactic acid are used to provide a skeleton support for the phase change material 2. At least one of sodium alginate and polylactic acid is added to the phase change material 2 to avoid the deviation of the molding size of the aerosol generation matrix during the molding process, such as the extrusion molding process, due to the insufficient strength of the phase change material 2. During the heating process of the aerosol generation matrix, the phase change material is heated and vaporized, and the sodium alginate and / or polylactic acid remain in a solid state to provide support for the substrate. Polylactic acid is used as an emulsifier in the process of forming intermolecular bonds and mixing with the phase change material. Polylactic acid is added to the phase change material 2 to improve the preservation ability of the phase change material 2.

[0056] Flavors and fragrances can be composed of a mixture of natural flavors and artificial synthetic flavors.

[0057] In one embodiment, flavors and fragrances are used to provide characteristic aromas, such as hay aroma, roasted sweet aroma, and solid substances of nicotine. Flavors and fragrances may include one or more combinations of tobacco, aromatic plant extracts, extracts, essential oils, and absolute oils; flavors and fragrances may include one or more combinations of monomeric aroma substances, such as megastigmatriene, neophytadiene, geraniol, nerol, and the like.

[0058] In one embodiment, the substrate 1 includes plant materials and glycerol. The plant materials are used to generate active ingredients of aerosol when heated. The plant materials are the core source of fragrance. The active ingredients in the plant materials, such as endogenous substances, can give users a sense of physiological satisfaction. Endogenous substances, such as alkaloids, enter the human blood and promote the pituitary gland to produce dopamine, thereby obtaining a sense of physiological satisfaction. Glycerol is used to evaporate when heated to form smoke, which can increase the amount of aerosol.

[0059] In one embodiment, the plant material is in the form of flakes, strips or powders. Flakes, strips or powders are all shapes formed after the plant material is crushed.

[0060] Exemplarily, in one embodiment, the plant material can be a combination of one or more plant raw materials such as tobacco leaves, tobacco leaf fragments, tobacco stems, tobacco dust and aromatic plants after being crushed.

[0061] The sheet shape can be a shape formed by breaking the original shape of the plant material and then reshaping it. For example, the plant material is reshaping it through a rolling method, a thick pulp method or a papermaking method. For example, the sheet shape is formed by making the plant material into a fiber pulp and then drying and dehydrating it.

[0062] The strips may be formed by directly cutting the plant material.

[0063] Powdered form can refer to the form formed after the plant material is ground.

[0064] Plant raw materials refer to raw materials that retain the natural form of plants. Generally, after plant raw materials are harvested from the land, they are processed by removing rotten old leaves, cleaning, drying, etc., but no deep processing that changes the natural form of the plants is carried out.

[0065] The phase change speed of the phase change material 2 can be regulated by changing the mass ratio of the phase change material 2, so that the substrate 1 is gradually exposed and releases the aerosol, thereby improving the consistency of aerosol release. Exemplarily, in one embodiment, the mass ratio of the plant material in the substrate 1, the glycerol in the substrate 1, the propylene glycol in the substrate 1 and the phase change material 2 is 1: (0.05-0.4): (0-0.1): (0.1-1). The mass ratio of glycerol in the substrate 1 is in the range of 0.05-0.4, which can avoid the excessive viscosity of the substrate 1, making it difficult to form the substrate 1, and can also avoid the insufficient glycerol content causing the aerosol amount to be too small. The mass ratio of propylene glycol in the substrate 1 is in the range of 0-0.1, that is, there may be propylene glycol or no propylene glycol in the substrate 1. Propylene glycol is used to evaporate when heated to form smoke, which is used to increase the amount of aerosol. The higher the porosity of the aerosol generating matrix 100, the lower the thermal conduction efficiency and the higher the aerosol transmission efficiency; the lower the porosity of the aerosol generating matrix 100, the higher the thermal conduction efficiency and the lower the aerosol transmission efficiency. The mass ratio of the phase change material 2 is in the range of 0.1 to 1, which can ensure that the porosity of the substrate 1 is appropriate, taking into account the thermal conduction efficiency and the aerosol transmission efficiency, and can also ensure that the structural strength of the aerosol generating matrix 100 is moderate.

[0066] In one embodiment, the temperature range of the substrate 1 to generate aerosol when heated is 150°C to 400°C; the phase change temperature of the phase change material 2 when heated is 80°C to 160°C. Exemplarily, the phase change temperature of the phase change material 2 is 80°C, 100°C, 110°C, 120°C, 150°C or 160°C, etc. In other words, when the heating temperature of the heating element is above 80°C, the phase change material 2 begins to undergo a phase change. During the phase change process of the phase change material 2, the heat of the heating element can be transferred to the substrate 1 through the phase change material 2. As the phase change material 2 gradually vaporizes to generate gaps 2a, the substrate 1 begins to release aerosol when it is heated to above 150°C. The aerosol generating matrix 100 begins to release aerosol. At this time, the substrate 1 has already generated gaps 2a. In the subsequent suction process, the aerosol generated by the substrate 1 can be transmitted through the gaps 2a, thereby improving the transmission efficiency.

[0067] In one embodiment, please refer to Figure 6 The gap 2a includes micropores 2ab. Micropores 2ab refer to pores with a hydraulic diameter of no more than 100 μm. Micropores 2ab can increase the surface area of ​​the substrate 1, thereby improving the extraction efficiency of the effective components of the substrate 1.

[0068] It is understandable that the micropores 2ab are determined by the size of the phase change material 2. For example, the phase change material 2 is in a granular form. Since the micropores 2ab are formed after the phase change material 2 is vaporized, the size of the granular phase change material 2 is the size of the micropores 2ab.

[0069] It should be noted that the hydraulic diameter refers to the ratio of four times the flow cross-sectional area to the perimeter. The flow cross-section refers to the cross-section taken by the streamline cluster perpendicular to the fluid. For example, if the flow cross-sectional shape is a regular quadrilateral, the hydraulic diameter is the ratio of four times the flow cross-sectional area of ​​the regular quadrilateral to the perimeter of the regular quadrilateral. For another example, if the flow cross-sectional shape is a circle, the hydraulic diameter is the diameter of the circular flow cross-sectional shape.

[0070] It is understandable that the flow cross section of the micropore 2ab may be in a regular shape such as a circle, an ellipse, a polygon (such as a square, a prism or a pentagon, etc.), etc. The flow cross section of the micropore 2ab may also be in an irregular shape.

[0071] In some embodiments, there are multiple micropores 2ab, and at least some of the multiple micropores 2ab are connected to form a first microchannel. Aerosol can flow through the first microchannel.

[0072] In one embodiment, the hydraulic diameter of the micropore 2ab is 0.1nm to 30μm. Exemplarily, the hydraulic diameter of the micropore 2ab is 0.1nm, 1nm, 10nm, 100nm, 1μm, 10μm, 20μm, 25μm or 30μm, etc. If the hydraulic diameter of the micropore 2ab is too small, the transmission of the aerosol is not obvious. If the hydraulic diameter of the micropore 2ab is too large, the substrate 1 is relatively loose and the structural strength is relatively poor. The hydraulic diameter of the micropore 2ab is 0.1nm to 30μm, which can take into account both the transmission efficiency of the aerosol and the structural strength of the substrate 1.

[0073] In one embodiment, please refer to Figures 2 to 6 The gap 2a includes an air channel 2ac, and the air channel 2ac passes through at least one end surface of the substrate 1 in the longitudinal direction. The air channel 2ac is a hole or groove with a hydraulic diameter greater than 100 μm. In this way, the aerosol generated by the substrate 1 can enter the air channel 2ac, and is gathered and guided by the air channel 2ac, thereby improving the utilization rate of the active ingredient.

[0074] In some embodiments, the air channel 2ac passes through one end of the substrate 1 in the longitudinal direction. For example, one end of the air channel 2ac passes through one end of the substrate 1 in the longitudinal direction, and the other end of the air channel 2ac passes through the circumferential surface of the substrate 1. For another example, one end of the air channel 2ac passes through one end of the substrate 1 in the longitudinal direction, and the other end of the air channel 2ac is a blind end. In other words, the other end of the air channel 2ac is located inside the substrate 1.

[0075] In other embodiments, the air channel 2ac passes through both ends of the substrate 1 in the longitudinal direction. In this way, the airflow can flow from one end of the substrate 1 to the other end of the substrate 1 along the air channel 2ac. The aerosol can flow more smoothly through the air channel 2ac, and the aerosol in the air channel 2ac can be delivered in an orderly manner, with less aerosol flow resistance and good controllability, which effectively improves the aerosol extraction efficiency and enhances the inhalation experience.

[0076] The shape of the flow cross section of the airway 2ac is not limited. For example, the shape of the flow cross section of the airway 2ac can be circular (eg Figures 2 to 3 As shown), elliptical, oval, polygonal, fan-shaped and other regular shapes, the shape of the flow cross-section of the airway 2ac can also be an irregular shape.

[0077] In one embodiment, the hydraulic diameter of the air channel 2ac is 0.05 mm to 6 mm. Exemplarily, the hydraulic diameter of the air channel 2ac is 0.05 mm, 0.1 mm, 1 mm, 3 mm, 4 mm, 5 mm, 5.5 mm or 6 mm, etc. In this way, the hydraulic diameter of the air channel 2ac is moderate, which is convenient for manufacturing and molding, reduces the manufacturing difficulty, improves the yield rate, and can effectively collect and transmit aerosols.

[0078] In one embodiment, the number of the air passages 2ac may be one or more.

[0079] The arrangement of the air passages 2ac is not limited. For example, the multiple air passages 2ac can be arranged along a straight line, along a curve, in a two-dimensional matrix, in a plurality of nested rings, in concentric circles, and the like.

[0080] In one embodiment, please refer to Figure 2 , the air channel 2ac can be formed inside the substrate 1.

[0081] In one embodiment, the air channel 2ac may be formed on the circumferential surface of the substrate 1. That is, the air channel 2ac is a groove-shaped structure that is open radially outward. The groove-shaped structure can reduce the flow rate of the air channel 2ac located at the center of the substrate 1, so that the substrate 1 can achieve uniform sustained release during the heating process, and has the effect of improving the extraction of effective ingredients in the edge of the substrate 1 and improving the uniformity during the suction process.

[0082] In one embodiment, please refer to Figure 2 The air channel 2ac may be a straight air channel 2ac extending in a straight line. The straight air channel 2ac is easy to form and can reduce the manufacturing difficulty. The flow resistance of the airflow in the straight air channel 2ac is relatively small.

[0083] In one embodiment, the linear holes may extend in the longitudinal direction or in a direction intersecting the longitudinal direction.

[0084] In some embodiments, the air channel 2ac is a curved air channel 2ac, and at least part of the hole section of the curved air channel 2ac is a curved shape with a non-zero curvature. The curved air channel 2ac can greatly increase the flow path of the airflow without significantly increasing the length of the aerosol generating substrate 100, and can extend the contact time between the airflow and the hole wall of the curved air channel 2ac, thereby improving the aerosol extraction rate.

[0085] In one embodiment, the curved airway 2ac is in the shape of a spiral line. That is, the three-dimensional shape of the curved airway 2ac is in the shape of a spatial spiral line. The line connecting any point of the spiral curved airway 2ac and the starting point has an inclination angle relative to its axis. The spiral curved airway 2ac can greatly extend the flow path of the airflow, precipitate the aerosol from the substrate 1 into the curved airway 2ac, increase the flow speed of the aerosol, thereby increasing the impact force of the airflow, so that the aerosol can be evenly mixed, improve the uniformity of the aerosol, and enhance the user's suction experience.

[0086] In some embodiments, the substrate 1 is a particle combination, and there are micro gaps between the particles of the particle combination, and multiple micro gaps are connected to form a second micro channel. For example, the flow cross-sectional area and length of the second micro channel are naturally formed by the material components, and the material components expand to a certain extent to form the second micro channel. Aerosol can flow through the second micro channel. In this way, the micro gap can not only increase the surface area of ​​the aerosol generating matrix 100, facilitate heat transfer, improve heating efficiency, but also facilitate aerosol circulation.

[0087] It should be noted that the micro-gap and micropore 2ab described in the present application are different from the airway 2ac, and the first microchannel and the second microchannel are both disordered. In other words, the first microchannel and the second microchannel are both randomly generated. Disorder means that it is difficult to generate in an orderly manner according to the design. The airway 2ac is ordered, which means that it is mainly processed by design and is predictable. The airway 2ac described in the present application is a hole in the macroscopic sense, and the micro-gap and micropore 2ab are both holes in the microscopic sense. The cross-sectional area and length of the airway 2ac are much larger than those of the micro-gap and micropore 2ab. The air channel 2ac is mainly processed by design. For example, the air channel 2ac is processed by a mold such as a die. Therefore, the flow cross-sectional area and length and other dimensions of the air channel 2ac can be changed according to the design requirements, and the size of the micro-gap is determined by the gap between particles. For example, the material is granular, and the aerosol generating matrix 100 formed by extrusion of the material has a micro-gap. The flow cross-sectional area and length and other dimensions of the micro-gap are naturally formed by the extrusion process and the material components. The micro-gap can be formed by a certain expansion after the material feeding barrel flows out of the die.

[0088] In some embodiments, the aerosol generating substrate 100 has micropores 2ab, microgaps and airways 2ac, the first microchannel and the second microchannel can be interconnected, and both the first microchannel and the second microchannel are connected to the airway 2ac. The aerosol generating substrate 100 releases aerosol when heated, and is collected in the airway 2ac through the first microchannel and the second microchannel. The aerosol released by the substrate 1 (i.e., the material located on the inner surface of the airway 2ac) exposed to the airway 2ac can be directly released into the airway 2ac, and the aerosol between adjacent airways 2ac can also circulate with each other through the first microchannel and the second microchannel, and is transported to the downstream end where the functional section 200 is located under the action of the suction negative pressure.

[0089] In one embodiment, the aerosol generating substrate 100 is an integrally formed structure.

[0090] For example, the aerosol generating matrix 100 can be made into an integral structure by injection molding, die casting or extrusion, etc. In this way, the aerosol generating matrix 100 is an integral medium during use, such as when heated or after heating, and is not prone to disintegration and falling.

[0091] Extrusion molding refers to a processing method in which the material is pushed toward the discharge port by the extrusion screw through the interaction between the barrel and the extrusion screw of the extrusion device, and is formed into an aerosol-generating matrix 100 with a preset cross-sectional shape through an extrusion die such as a die.

[0092] In one embodiment, the substrate 1 includes propylene glycol, and the aerosol generating substrate 100 is formed by mixing plant materials, glycerol, propylene glycol and phase change material 2 and then extruding. That is to say, the phase change material 2 is dispersed in the substrate 1, and the plant materials, glycerol, propylene glycol and phase change material 2 can be mixed relatively evenly. After the aerosol generating substrate 100 is mixed into a mixed material by plant materials, glycerol, propylene glycol and phase change material 2, the mixed material is extruded into an integrated structure through an extruder. Exemplarily, the plant material and the phase change material 2 are both granular, and micropores 2ab are formed in the substrate 1 after the phase change material 2 is gasified, and micro gaps are also formed between the particles. The endogenous substances released by the plant material and the smoke generated by glycerol and propylene glycol together constitute an aerosol, which can be manufactured into an aerosol generating substrate 100 with micropores 2ab in the manner of this embodiment.

[0093] In one embodiment, the substrate 1 includes propylene glycol, the plant material, glycerol and propylene glycol in the substrate 1 are mixed to form a first mixture, the phase change material 2 and glycerol are mixed to form a second mixture, and the aerosol generation substrate 100 is formed by layered extrusion of the first mixture and the second mixture. Glycerol can be used as a liquid base in the second mixture so that the second mixture is extruded by an extruder under a certain pressure. During the suction use process, the glycerol in the second mixture can also be used to supplement the glycerol content in the substrate 1, thereby increasing the amount of aerosol. Layered extrusion is a co-extrusion process in an extrusion process, and the first mixture and the second mixture are layered and formed, that is, the first mixture and the second mixture can be extruded successively. Exemplarily, an aerosol generation substrate 100 with an airway 2ac can be manufactured by the method of this embodiment (i.e., formed by extruding the first mixture, and simultaneously co-extruding the second mixture in the airway 2ac, or the first mixture can be extruded first, and then the second mixture is formed in the airway 2ac of the substrate).

[0094] In one embodiment, the density of the aerosol generating matrix 100 after the phase change material 2 is vaporized is 0.1 g / cm 3 Up to 0.4g / cm 3 For example, the density of the aerosol generating substrate 100 after the phase change material 2 is vaporized is 0.1 g / cm 3 , 0.15g / cm 3 , 0.2g / cm 3 , 0.25g / cm 3 , 0.3g / cm3 or 0.4g / cm3, etc. After the phase change material 2 is vaporized, the remaining substance of the aerosol generating substrate 100 is basically the substrate 1. The density of the aerosol generating substrate 100 after the phase change material 2 is vaporized is 0.1g / cm3 to 0.4g / cm 3 The density of the substrate 1 is moderate, which is convenient for heat transfer in the substrate 1 to achieve uniform heating, and there is sufficient material for releasing aerosol, so that the user has a good smoking experience, and it can also avoid the material in the substrate 1 from being easily dispersed and separated due to excessive density.

[0095] The following schematically shows a specific embodiment, which is described in detail as follows:

[0096] For the first specific embodiment, please refer to Figure 6The aerosol generating matrix 100 is formed by mixing the substrate 1 and the phase change material 2 and then extruding them. During the extrusion process of the aerosol generating matrix 100, a channel 100a is directly formed by a mold such as a die. The mass ratio of the plant material in the substrate 1, the glycerin in the substrate 1, the propylene glycol in the substrate 1 and the phase change material 2 is 1:0.2:0.05:0.3. The phase change material 2 is composed of polyethylene glycol, chitosan and flavors and fragrances. The mass ratio of the polyethylene glycol in the phase change material 2, the chitosan in the phase change material 2 and the flavors and fragrances in the phase change material 2 is 1:1.5:0.3. Please refer to Figure 6 , the gaps 2a formed after the phase change material 2 is vaporized are micropores 2ab. After the aerosol generating matrix 100 is heated to 100°C, the phase change material 2 gradually undergoes a phase change, and the entire phase change is completed after 280°C, so that the volume occupied by the original phase change material 2 is exposed to form gaps 2a such as micropores 2ab. In this way, the aroma components and active ingredients are released more evenly during the heating process of the aerosol generating matrix 100, which can improve the consistency during user use.

[0097] See also Figure 6 The channel 100a penetrates at least one end surface of the aerosol generating substrate 100 in the longitudinal direction. The channel 100a is a hole or a groove with a hydraulic diameter greater than 100 μm. The channel 100a is used to collect and circulate aerosol. The channel 100a is a prefabricated channel, that is, the channel 100a has been formed before the aerosol generating substrate 100 is heated, and the formation of the channel 100a does not depend on the heating of the aerosol generating substrate.

[0098] The channel 100a is the same as the air channel 2ac, and the channel 100a is also orderly, that is, it is mainly processed by design and has predictability. The channel 100a described in the present application is a hole in a macroscopic sense. The channel 100a can be processed by a mold such as a die.

[0099] The number of the channel 100a may be one or more.

[0100] The arrangement of the channels 100a is not limited. For example, the multiple channels 100a can be arranged along a straight line, along a curve, in a two-dimensional matrix, in a plurality of nested rings, in concentric circles, and so on.

[0101] In one embodiment, please refer to Figure 6 , the channel 100a can be formed inside the aerosol generating substrate 100.

[0102] In one embodiment, please refer to Figure 6 The channel 100a may be formed on the circumferential surface of the aerosol generating substrate 100. That is, the channel 100a is a groove-shaped structure open toward the radial outside.

[0103] Exemplarily, the channel 100a may be a linear channel extending in a straight line. In one embodiment, the linear channel may extend in the longitudinal direction or in a direction intersecting the longitudinal direction.

[0104] Exemplarily, the channel 100a is a curved channel. In one embodiment, the curved channel 100a is in a spiral shape.

[0105] For the second specific embodiment, please refer to Figure 7 and Figure 8 The difference between the second specific embodiment and the first specific embodiment is that the aerosol generating matrix 100 is a cylinder without air passages 2ac, and the gaps 2a formed after the phase change material 2 is vaporized are micropores 2ab. During the heating process, the phase change material 2 gradually undergoes a phase change, exposing the volume occupied by the original phase change material 2 to form micropores 2ab. These micropores 2ab allow the active ingredients generated by the substrate 1 to be gradually released into the micropores 2ab and released for the user to inhale. This gradual release, i.e., sustained release, can improve the overall consistency of the user during the inhalation process and increase the duration of the user's inhalation.

[0106] For the third specific embodiment, please refer to Figure 5 , the aerosol generating matrix 100 is extruded in layers through the first mixture and the second mixture. The mass ratio of the plant material in the substrate 1, the glycerin in the substrate 1, the propylene glycol in the substrate 1 and the phase change material 2 is 1:0.1:0.05:1. The phase change material 2 is composed of polyethylene glycol, sodium alginate and flavors and fragrances. After the aerosol generating matrix 100 is heated to 160°C, the phase change material 2 gradually undergoes a phase change and enters the substrate 1 to be vaporized, replenishing the amount of aerosol. In addition, after the phase change material 2 is completely phase-changed, the volume occupied by the original phase change material 2 is exposed to form a gap 2a, such as an airway 2ac (reference Figure 4 ). Since the volatilization temperature of the aroma components in flavors and fragrances is relatively low, the aroma is released prematurely during the heating or preheating process, which will lead to uneven aroma release. Therefore, by using the phase change material 2 to coat the flavors and fragrances, during the heating process, the phase change material 2 undergoes a physical change (phase change) to release the coated flavors and fragrances, thereby improving the uniformity during the inhalation process. In addition, the phase change material 2 can regulate the exposure rate of the substrate 1 or the release rate of the active ingredient by gradually releasing and forming the gap 2a, thereby improving the consistency of the release of the active ingredient during the heating process. Improving the exchange of substances with the air during the heating process makes the release of the aroma components and active ingredients during the heating process more uniform, which can improve the consistency during consumer use.

[0107] In one embodiment, the substrate 1 further includes auxiliary materials, smoke generating materials, adhesive materials and flavors and fragrances.

[0108] The auxiliary material is used to provide a skeleton support for the plant material. The smoke-generating material is used to generate a large amount of smoke when heated. The adhesive material is used to bond the component materials. The flavor and fragrance are used to provide a characteristic aroma. In this way, the plant material and the smoke-generating material can ensure the amount of aerosol generated, while the flavor and fragrance can enhance the release of the aroma during the suction process and enhance the user experience. The auxiliary material can not only improve the fluidity of the mixed material, but also make the aerosol generating matrix 100 porous to facilitate the extraction and flow of the aerosol. The adhesive material ensures that the plant material powder and the auxiliary agent constitute a stable mixture to avoid a loose structure.

[0109] In one embodiment, the auxiliary material can be one or more combinations of inorganic fillers, lubricants, and emulsifiers. Among them, the inorganic filler includes one or more combinations of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. The inorganic filler can provide a skeleton support for the plant material, and the inorganic filler also has tiny holes, which can increase the porosity of the aerosol generating matrix 100, thereby increasing the aerosol release rate.

[0110] The lubricant includes one or more combinations of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, and palmitic acid. The lubricant can increase the fluidity of the plant material powder, reduce the friction between the plant material powders, make the overall density of the plant material powder distribution more uniform, and also reduce the pressure required in the extrusion molding process and reduce the wear of the die.

[0111] The emulsifier includes one or more combinations of polyglycerol fatty acid ester, Tween-80, and polyvinyl alcohol. The emulsifier can slow down the loss of flavor substances during storage to a certain extent, increase the stability of flavor substances, and improve the sensory quality of the product.

[0112] In one embodiment, the smoke-generating agent material may include: a monohydric alcohol (such as menthol); a polyhydric alcohol (such as propylene glycol, glycerol, triethylene glycol, 1,3-butylene glycol and tetraethylene glycol); an ester of a polyhydric alcohol (such as triacetin, triethyl citrate, a mixture of diacetin esters, triethyl citrate, benzyl benzoate, glyceryl tributyrate); a monocarboxylic acid; a dicarboxylic acid; a polycarboxylic acid (such as lauric acid, myristic acid) or an aliphatic ester of a polycarboxylic acid (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butylene glycol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, Triactin, meso-erythritol, a mixture of diacetin esters, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, glyceryl tributyrate, lauryl acetate) or one or more combinations thereof.

[0113] In one embodiment, the adhesive material is in close contact with the component material interface by wetting, generating intermolecular attraction, thereby playing the role of bonding the component materials such as powders, liquids, etc. The adhesive material can be a natural plant extract, a non-ionized modified viscous polysaccharide, including one or more combinations of tamarind polysaccharide, guar gum, and modified cellulose (such as carboxymethyl cellulose). The adhesive is used to bond the particles together, which is not easy to loosen. In addition, it improves the water resistance of the aerosol generating matrix 100 and is harmless to the human body.

[0114] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0115] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. An aerosol generating substrate, characterized in that The invention comprises a substrate and a phase change material. The substrate generates aerosol when heated, and the phase change material vaporizes when heated to form gaps in the substrate.

2. The aerosol-generating substrate according to claim 1, characterized in that The phase change material includes at least one of polyethylene glycol, chitosan, gelatin, wax, starch and konjac glucomannan.

3. The aerosol-generating substrate according to claim 2, characterized in that At least one of sodium alginate, fatty acid, polylactic acid and flavors is doped into the phase change material.

4. The aerosol-generating substrate according to claim 1, characterized in that The substrate includes plant material and glycerin.

5. The aerosol-generating substrate according to claim 4, characterized in that The plant material is in the form of flakes, strips or powder.

6. The aerosol-generating substrate according to claim 4, characterized in that The mass ratio of the plant material in the substrate, the glycerol in the substrate, the propylene glycol in the substrate and the phase change material is 1:(0.05-0.4):(0-0.1):(0.1-1).

7. The aerosol-generating substrate according to claim 4, characterized in that The base material comprises propylene glycol, and the aerosol generating matrix is ​​formed by mixing the plant material, the glycerol, the propylene glycol and the phase change material and then extruding the mixture.

8. The aerosol-generating substrate according to claim 4, characterized in that The substrate includes propylene glycol, the plant material, glycerol and propylene glycol in the substrate are mixed to form a first mixture, the phase change material and glycerol are mixed to form a second mixture, and the aerosol generating matrix is ​​formed by layered extrusion of the first mixture and the second mixture.

9. The aerosol-generating substrate according to claim 1, characterized in that The temperature range of the substrate to generate aerosol when heated is 150°C to 400°C; the phase change temperature of the phase change material when heated is 80°C to 160°C.

10. The aerosol-generating substrate according to claim 1, characterized in that The voids include micropores.

11. The aerosol-generating substrate according to claim 10, characterized in that The hydraulic diameter of the micropores is 0.1 nm to 30 μm.

12. The aerosol-generating substrate of claim 1, wherein The void includes an air channel that passes through at least one end surface of the substrate in the longitudinal direction.

13. The aerosol-generating substrate according to claim 12, characterized in that The hydraulic diameter of the air channel is 0.05 mm to 6 mm.

14. The aerosol-generating substrate of claim 1, wherein The density of the aerosol generating substrate after the phase change material is gasified is 0.1 g / cm3 to 0.4 g / cm3.

15. An aerosol generating article, characterized in that The invention comprises a functional segment and the aerosol generating substrate according to any one of claims 1 to 14, wherein the functional segment is arranged at one end of the aerosol generating substrate in the longitudinal direction.

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