Aerosol-generating article having a laminated wrapper

Abstract

The present invention relates to an aerosol-generating article comprising an aerosol-forming substrate and a laminated wrapper. The aerosol-forming substrate comprises a cut plant material filler, and wherein the cut plant material filler comprises at least 25% of plant leaves by weight of total plant material, and wherein the aerosol-forming substrate further comprises between about 6% and about 20% of an aerosol former. The laminated wrapper is at least partially wrapped around the aerosol-forming substrate. The laminated wrapper comprises a thermally conductive layer and a thermally insulating layer. The thermally conductive layer and the thermally insulating layer overlap in an axial direction of the aerosol-generating article.

Description

[0001] This application is a divisional application of the invention patent application entitled "Aerosol-generated article having laminated packaging", with an international filing date of December 4, 2019, international application number PCT / EP2019 / 083705, and national application number 201980068759.4. Technical Field

[0002] This invention relates to an aerosol-generating product, an aerosol-generating apparatus, and a method for manufacturing an aerosol-generating product. Background Technology

[0003] An aerosol generating apparatus for generating inhalable aerosols is known. Such an apparatus can heat an aerosol-forming substrate contained in an aerosol-generating article without burning the aerosol-forming substrate. The aerosol-generating article may be rod-shaped for insertion into a heating chamber of the aerosol-generating apparatus. Heating elements may be arranged within or around the heating chamber to heat the aerosol-forming substrate after the aerosol-generating article is inserted into the heating chamber of the aerosol-generating apparatus.

[0004] Although the temperature required for such a device to release the relevant amount of material to allow the formation of an acceptable aerosol is significantly lower than the temperature required for combustion, not all substrates are suitable for releasing sufficient amounts of material to form adequate aerosols at predetermined temperatures below the combustion temperature of the aerosol-forming substrate. Therefore, sophisticated aerosol-forming substrates have been developed to allow for material release at low temperatures. Currently, this is achieved, for example, by using papermaking or casting processes to transform tobacco leaves into artificially homogenized tobacco sheets.

[0005] However, relatively large amounts of aerosol forming agents are often used to allow the generation of acceptable aerosols at temperatures below combustion levels, and typically, the lower the temperature, the more aerosol forming agent is required. The presence of large amounts of aerosol forming agents has unintended consequences, particularly contamination of the packaging of aerosol-generating articles.

[0006] Therefore, there is a need to provide aerosol-generating articles with a simple structure that allow aerosols to be generated at low temperatures. Additionally, there is a need to provide so-called "heat-not-burn" articles with a more natural appearance and taste. Summary of the Invention

[0007] According to a first aspect of the invention, an aerosol-generating article is provided, comprising an aerosol-forming substrate and a laminated package. The aerosol-forming substrate comprises shredded plant material filler, wherein the shredded plant material filler comprises at least 25% plant leaves by weight of the total plant material, and wherein the aerosol-forming substrate further comprises an aerosol-forming agent between about 6% and about 20%. The laminated package at least partially surrounds the aerosol-forming substrate. The laminated package includes a thermally conductive layer and a thermally insulating layer. The thermally conductive layer and the thermally insulating layer overlap along the axial direction of the aerosol-generating article.

[0008] Advantageously, a more natural taste and appearance of aerosol-generated products can be achieved by using natural plant material, leaves. The term "leaves" refers to the stemless portion of a plant leaf.

[0009] Preferably, the aerosol-forming substrate comprises shredded filler. In this document, "shredded filler" refers to chopped plant material (especially leaves), processed stems and ribs, or blends of homogenized plant material, for example, formed into sheets using casting or papermaking processes. Shredded filler may also include other post-cut fillers such as tobacco or casings. According to a preferred embodiment of the invention, the shredded filler comprises at least 25% plant leaves, more preferably at least 50% plant leaves, even more preferably at least 75% plant leaves, and most preferably at least 90% plant leaves. Preferably, the plant material is one of tobacco, peppermint, tea, and clove; however, the invention is equally applicable to other plant materials having the ability to release substances that can subsequently form aerosols upon application of heat.

[0010] Preferably, the tobacco plant material includes leaves of one or more of flue-cured tobacco, sun-cured tobacco, aromatic tobacco, and filler tobacco. Flue-cured tobacco is tobacco with typically large, light-colored leaves. Throughout this specification, the term "flue-cured tobacco" refers to tobacco that has been smoked. Examples of flue-cured tobacco include Chinese flue-cured tobacco, Brazilian flue-cured tobacco, American flue-cured tobacco such as Virginia tobacco, Indian flue-cured tobacco, Tanzanian flue-cured tobacco, or other African flue-cured tobacco. Flue-cured tobacco is characterized by a high sugar-to-nitrogen ratio. From a sensory perspective, flue-cured tobacco is a type of tobacco that, after roasting, produces a pungent and invigorating sensation. According to the invention, bright-colored tobacco is tobacco with a reducing sugar content between about 2.5% and about 20% based on the dry weight of the tobacco leaves and a total ammonia content of less than about 0.12% based on the dry weight of the tobacco leaves. Reducing sugars include, for example, glucose or fructose. Total ammonia includes, for example, ammonia and ammonium salts. Sun-cured tobacco is tobacco with typically large, dark-colored leaves. Throughout this specification, the term "sun-cured tobacco" refers to tobacco that has undergone an air-drying process. Additionally, sun-cured tobacco can be fermented. Tobacco primarily used for chewing, snuff, cigars, and pipe blends is also included in this category. These sun-cured tobaccos are typically air-dried and may undergo fermentation. From a sensory perspective, sun-cured tobacco is a type of tobacco that, after roasting, has a dark, cigar-like flavor with a smoky character. Sun-cured tobacco is characterized by a low sugar-to-nitrogen ratio. Examples of sun-cured tobacco include Malawi Burrito or other African Burrito, dark-roasted Brazil Galpao, and sun-dried or air-dried Indonesian Kasturi. According to the invention, sun-cured tobacco is tobacco with a reducing sugar content of less than about 5% by dry weight and a total ammonia content of at most about 0.5% by dry weight. Aromatic tobacco is tobacco that often has small, pale-colored leaves. Throughout this specification, the term "aromatic tobacco" is used for other tobaccos with high aromatic content, such as essential oils. From a sensory perspective, aromatic tobacco is a type of tobacco that, after roasting, has a spicy and aromatic flavor. Examples of aromatic tobaccos include Greek Oriental, Oriental Turkish, semi-Oriental tobaccos, and roasted American Burley, such as Perique, Rustica, American Burley, or Meriland. Filler tobaccos are not specific tobacco types, but encompass tobacco types primarily used to complement other tobacco types used in blends and do not impart specific characteristic aromas to the final product. Examples of filler tobaccos are the stems, midribs, or stalks of other tobacco types. A specific example could be the smoked stalks of lower stems from Brazilian flue-cured tobacco.

[0011] However, the use of large amounts of natural blades in filament fillers requires significant amounts of aerosol forming agents, especially at low temperatures. According to the invention, a specific packaging material is provided that prevents staining due to high aerosol forming agent content. In particular, thermally conductive materials, such as metals, have been found to effectively prevent staining. In this respect, it has been found that contamination can be conveniently prevented regardless of the orientation of the thermally conductive layer relative to the aerosol forming substrate, i.e., whether the thermally conductive layer faces or faces away from the aerosol forming substrate.

[0012] Furthermore, it has been found that a thermally conductive layer can readily contribute positively to the energy distribution within an aerosol-generating article. By providing a thermally conductive layer to the laminated packaging, uniform heating of the aerosol-forming substrate of the aerosol-generating article can be achieved. In this regard, the aerosol-generating article can be used with an aerosol-generating apparatus, as described in more detail below. The aerosol-generating apparatus may include a heating element for heating the aerosol-forming substrate of the aerosol-generating article. For this purpose, the heating element dissipates heat. By providing a thermally conductive layer to the laminated packaging, the heat dissipated by the heating element can be uniformly distributed across the entire laminated packaging. Since the laminated packaging is arranged to at least partially surround the aerosol-forming substrate, the thermally conductive layer helps to uniformly heat the aerosol-generating substrate.

[0013] The insulation layer prevents heat from escaping from the aerosol-forming substrate to the surrounding area of ​​the aerosol-formed article. Furthermore, the insulation layer provides structural stability to the laminated packaging. The insulation layer can also be used as a support for the insulation layer itself.

[0014] The combination of a thermally conductive layer and an insulating layer is particularly advantageous for heating the aerosol-forming substrate from within the aerosol-generating article, for example, by means of pins or blades. According to the invention, the thermally conductive layer and the insulating layer overlap along the axial direction of the aerosol-generating article. The axial direction is the direction along the longitudinal axis of the aerosol-generating article. Typically, the aerosol-generating article can be rod-shaped. In this case, the axial direction is along the direction of extension of the rod. The term "overlap" means that at least a portion of the laminated package includes a thermally conductive layer arranged adjacent to the insulating layer in the radial direction, while at least different portions of the laminated package include only a thermally conductive layer or only an insulating layer in the radial direction. In other words, at least a portion of the laminated package includes only a thermally conductive layer or only an insulating layer, while at least different portions of the laminated package include both a thermally conductive layer and an insulating layer. Further, a portion of the thermally conductive layer is not covered by the insulating layer or is not covered by the insulating layer or both.

[0015] Advantageously, the present invention can benefit the formation of aerosols in a variety of different configurations:

[0016] - In cases where the heat source is located within the aerosol-generating article (e.g., heating blades or pins) and the metal layer faces the aerosol-generating substrate. In such a configuration, the thermally conductive layer can absorb some of the heat dissipated from the heat source and heat the aerosol-generating substrate adjacent to the heat source. This can produce a smooth, average temperature across the entire aerosol-generating substrate.

[0017] - In cases where the heat source is located within the aerosol-generating article (e.g., heating blades or pins) and the metal layer faces the aerosol-generating substrate, the aerosol-forming agent may permeate the insulation layer due to its high content, particularly if made of paper, cotton, glass fiber, viscose fiber, or other similar materials. This can then create wicking when the heat-conducting layer is heated and the aerosol-forming agent wicked towards the heat-conducting layer evaporates.

[0018] - In the case where the heat source is located outside the aerosol-forming article and the metal layer faces the aerosol-forming substrate, again in this configuration, the heat-conducting layer can absorb heat from the heat source and radiate the heat directly to the aerosol-forming substrate in contact with the heat-conducting layer. Thus, compared to embodiments where there is no heat-conducting layer and heat must penetrate from the heat source into the article, the heat can potentially pass through the corresponding paper packaging and concentrate closer to the aerosol-forming substrate.

[0019] - When the heat source is located outside the aerosol-generating article and the metal layer faces the aerosol-generating substrate. This configuration can have the same benefits as the wicking described above, with the additional benefit that the heat transfer from the heat source to the heat-conducting layer is less interrupted.

[0020] Preferably, at least a portion of the laminated packaging includes a thermally conductive layer. This portion of the laminated packaging can be used for heating. This portion may also be referred to as a heating zone. In other words, as described in more detail below, this portion of the laminated packaging can be arranged close to the heating element so that this portion of the laminated packaging can be optimally heated. The advantage of omitting or reducing the insulation layer in this portion of the laminated packaging is that heat can optimally reach the thermally conductive layer and the aerosol-forming substrate enclosed by the thermally conductive layer. Providing an insulation layer at this portion of the laminated packaging would prevent heat from optimally reaching the thermally conductive layer and the aerosol-forming substrate. However, providing insulation layers at different portions of the laminated packaging allows the heat transferred from the heating element to the thermally conductive layer and the aerosol-forming substrate to be retained within the aerosol-forming substrate of the aerosol-generating article. Compared to portions of the laminated packaging that only contain a thermally conductive layer, the portion of the laminated packaging that includes an insulation layer is preferably a portion of the laminated packaging spaced apart from the heating element.

[0021] The laminated packaging can be wrapped around the entire circumference of the aerosol-forming substrate of the aerosol-generating article. Alternatively, if desired, the laminated packaging may not completely wrap around the aerosol-forming substrate. The laminated packaging can therefore only partially cover the circumference of the aerosol-forming substrate. Additional packaging can be arranged around the aerosol-generating article. In particular, if the laminated packaging only partially covers the circumference of the aerosol-forming substrate, additional packaging can be provided to completely cover the aerosol-generating article.

[0022] The term "laminated" in packaging refers to packaging in which at least two layers are preferably permanently assembled together by heating, pressurizing, welding, or adhesives. Preferably, these two layers are an insulating layer and a thermally conductive layer. Laminated packaging may potentially include additional layers if desired. However, preferably, the thermally conductive layer is arranged directly adjacent to the aerosol-forming substrate of the aerosol-generating article. Preferably, the insulating layer is arranged directly adjacent to the thermally conductive layer. Preferably, the laminated packaging consists of a thermally conductive layer and an insulating layer.

[0023] The laminated packaging may include at least one heating zone in which the arrangement of the insulation layer is absent or reduced. The heating zone may also be referred to as a heating point. A heating zone can be achieved by providing a thermally conductive layer only in a portion of the laminated packaging, where heat energy can be optimally transferred to the thermally conductive layer and aerosol-forming substrate within the aerosol-generating article. The thermally conductive layer of the laminated packaging in the heating zone can help transfer heat from the outside of the aerosol-generating article to the aerosol-forming substrate. Preferably, adjacent to the heating zone, the laminated packaging includes both a thermally conductive layer and an insulation layer. The thermally conductive layer is preferably arranged inside the insulation layer. In other words, the thermally conductive layer is preferably arranged radially adjacent to the aerosol-forming substrate of the aerosol-generating article. The insulation layer is preferably arranged to surround the thermally conductive layer. The heat applied to the thermally conductive layer in the heating zone can be transferred axially within the thermally conductive layer. This heat will also be transferred radially to the interior of the aerosol-generating article in which the aerosol-forming substrate is disposed. On the other hand, in the portion of the heat-conducting layer covered by the insulation layer, the heat of the heat-conducting layer can be insulated by the insulation layer. Therefore, the heat in the heat-conducting layer will be transferred mainly within the heat-conducting layer along the axial direction and radially inward rather than radially outward.

[0024] A single heating zone can be provided, in which only a thermally conductive layer is provided to enclose the aerosol-forming substrate. Alternatively, multiple heating zones can be provided. In each heating zone, preferably, a thermally conductive layer is provided only around the aerosol-forming substrate. In portions of the laminated package between or adjacent to the heating zones, the laminated package preferably also includes an insulating layer enclosing the thermally conductive layer. As will be described in more detail below with respect to the aerosol-forming apparatus, multiple heating zones can be used for different heating methods of the heating elements of the aerosol-forming apparatus. Thus, multiple sections of the aerosol-forming substrate can be heated simultaneously by multiple heating zones. Alternatively or additionally, sequential heating of different heating zones can be achieved.

[0025] The heating zone can have an annular shape. An annular shape refers to a shape that extends completely around the circumference of the aerosol-forming substrate. An annular shape means that the cylindrical outer section of the aerosol-forming substrate is surrounded in the heating zone by a laminated packaging material, particularly a thermally conductive layer of the laminated packaging material. Advantageously, the annular shape of the heating zone achieves uniform circumferential heating of the aerosol-forming substrate. In other words, preferably, the annular shape of the heating zone can form an annular heating area.

[0026] The heat-conducting layer may include one or more of aluminum, tin, and copper. These materials have high thermal conductivity. These materials can therefore optimally transfer heat to the aerosol-forming substrate disposed inside the aerosol-generating article. Additionally, axial heat transfer within the heat-conducting layer can be optimized by providing materials with high thermal conductivity. Furthermore, these materials in the heat-conducting layer can prevent combustion of the aerosol-generating article. In this respect, the aerosol-generating article according to the invention can be used in a heated non-combustible device, wherein the aerosol-forming substrate is heated to generate an inhalable aerosol, but not combusted. Preventing combustion of the aerosol-forming substrate prevents the formation of unwanted aerosol components. Users may accidentally or intentionally attempt to reduce the weight of the aerosol-generating article. This undesirable weight reduction can be prevented by means of the material of the heat-conducting layer. In other words, the heat-conducting layer can be airtight. Therefore, advantageously, the safe handling of the aerosol-generating article of the invention is improved, and unintended use of the aerosol-generating article can be prevented.

[0027] The shredded filler suitable for this invention can generally be similar to shredded fillers used in conventional smoking articles. The shred width of the shredded filler is preferably between 0.3 mm and 2.0 mm, more preferably between 0.5 mm and 1.2 mm, and most preferably between 0.6 mm and 0.9 mm. The shred width can play a role in the heat distribution within the substrate portion of the article. Similarly, the shred width can play a role in the suction resistance of the article. Furthermore, the shred width can affect the overall density of the substrate portion.

[0028] The length of the shredded filler is somewhat random, as it will depend on the overall dimensions of the object from which the shreds are cut. However, longer shreds can be cut by conditioning the material before cutting, for example, by controlling the moisture content and overall fineness of the material. Preferably, the length of the shreds is between about 10 mm and about 40 mm before forming the shreds into substrate segments. Obviously, if the shreds are arranged in the substrate segments along their longitudinal extension direction, where the longitudinal extension of the segment is less than 40 mm, the final substrate segments may include strands that are on average shorter than the initial shred length. Preferably, the shred length of the shredded filler is such that about 20% to 60% of the shreds extend along the entire length of the substrate portion. This prevents the shreds from easily detaching from the substrate segments.

[0029] In a preferred embodiment, the weight of the aerosol-forming substrate is between 80 mg and 400 mg, preferably between 150 mg and 250 mg, and more preferably between 170 mg and 220 mg. This amount of aerosol formation typically allows sufficient material for aerosol formation. Furthermore, given the aforementioned limitations on diameter and size, this allows the aerosol-forming substrate to achieve a balanced density between energy absorption, suction resistance, and fluid channels within the substrate segment containing plant material.

[0030] According to the present invention, an aerosol forming substrate is impregnated with an aerosol forming agent. Impregnation of the aerosol forming substrate can be accomplished by spraying or other suitable application methods. The aerosol forming agent can be applied to the blend during the preparation of the filament filler. For example, the aerosol forming agent can be applied to the blend in a direct conditioning charging cylinder (DCCC). Conventional machinery can be used to apply the aerosol forming agent to the filament filler. The aerosol forming agent can be any suitable known compound or mixture of compounds that contributes to the formation of a dense and stable aerosol during use. The aerosol forming agent can help the aerosol substantially resist thermal degradation at the temperatures typically applied during the use of the aerosol-generating article. Suitable aerosol forming agents include, for example, polyols such as triethylene glycol, 1,3-butanediol, propylene glycol and glycerol; esters of polyols such as glycerol monoacetate, glycerol diacetate or glycerol triacetate; aliphatic esters of monocarboxylic acids, dicarboxylic acids or polycarboxylic acids such as dimethyl dodecanoate and dimethyl tetradecanoate; and combinations thereof.

[0031] Aerosol forming agents may include one or more of glycerol and propylene glycol. Aerosol forming agents may consist of glycerol or propylene glycol, or a combination of glycerol and propylene glycol.

[0032] Preferably, the amount of aerosol forming agent is between 6% and 20% by weight based on the dry weight of the aerosol forming substrate; more preferably, the amount of aerosol forming agent is between 8% and 18% by weight based on the dry weight of the aerosol forming substrate; and even more preferably, the amount of aerosol forming agent is between 10% and 15% by weight based on the dry weight of the aerosol forming substrate. For some embodiments, the amount of aerosol forming agent has a target value of about 13% by weight based on the dry weight of the aerosol forming substrate. Regardless of whether the aerosol forming substrate comprises plant leaves or homogenized plant material, the most effective amount of aerosol forming agent will also depend on the aerosol forming substrate. For example, among other factors, the type of substrate will determine the extent to which the aerosol forming agent can promote the release of substances from the aerosol forming substrate.

[0033] The aerosol-forming substrate of the present invention generates aerosols at a lower temperature than known tobacco cast leaf (TCL) sheets. Since the aerosol-forming agent is impregnated onto the shredded filler and thus provided on the outer surface of the shredded filler, the lower temperature is sufficient to generate aerosols. Furthermore, the nicotine and flavorings contained in the shredded filler blend more readily conform to the natural internal structure of the shredded filler to become usable with the aerosol-forming agent for generating inhalable aerosols. In contrast, artificially produced tobacco cast leaves have a rather disordered internal structure, which may hinder the migration of active ingredients to the surface.

[0034] For these reasons, the aerosol-forming substrate used in the aerosol-generating article of the present invention may be able to efficiently generate a sufficient amount of aerosol at a relatively lower temperature than consumables previously using tobacco cast leaf material. A temperature between 150°C and 200°C in the heating chamber may be sufficient for the aerosol-forming substrate of the present invention to generate a sufficient amount of aerosol, whereas in aerosol-generating apparatuses using tobacco cast leaf material, a temperature of approximately 250°C is typically used.

[0035] Another advantage of this invention, related to operation at lower temperatures, is that it eliminates the need for cooling the aerosol, thus reducing the need for aerosol cooling. Since low temperatures are typically used, simpler cooling mechanisms are sufficient. This, in turn, allows for simpler and less complex structures for aerosol-generated articles.

[0036] Therefore, advantageously, the aerosol generating article of the present invention comprises only a substrate portion in which an aerosol forming substrate is disposed, without any additional segments or sections. Such an embodiment will have a particularly simple structure.

[0037] Aerosol generating articles may include a substrate portion comprising an aerosol forming substrate and a filter portion. The filter portion is preferably disposed downstream of the substrate portion. The substrate portion may be arranged directly adjacent to the filter portion. The filter portion may include, for example, a hollow tubular filter portion, preferably a hollow acetate tube (HAT), a fine hollow acetate tube (FHAT), or a filament plug wrapped around a central cardboard tube, all of which are known from the manufacture of filter elements. The filter portion preferably includes a hollow central space.

[0038] If desired or necessary, for example, to achieve sufficiently high resistance for aerosol generation articles, an additional filter section may be included in the aerosol generation article. Preferably, such an additional filter section may be included between the substrate portion and the nozzle portion. Preferably, such an additional filter section comprises a filter material, such as cellulose acetate. Preferably, the length of the additional filter section is between about 4 mm and about 8 mm, more preferably between about 5 mm and about 7 mm. Preferably, the total length of the additional filter section and the hollow tubular filter portion is between about 10 mm and about 18 mm, more preferably 13 mm.

[0039] As used herein, the terms “upstream” and “downstream” are used to describe the relative position of a component or portion of a component of an aerosol-generating article according to the invention with respect to the direction of air drawn through the aerosol-generating article during use of the aerosol-generating article.

[0040] Laminated packaging can be provided to cover either the substrate portion or both the substrate portion and the filter portion. The laminated packaging can at least partially cover the substrate portion. Alternatively, the laminated packaging can completely cover the substrate portion. Alternatively, the laminated packaging can partially cover both the substrate portion and the filter portion. Alternatively, the laminated packaging can either completely cover the substrate portion and partially cover the filter portion, or partially cover both the substrate portion and completely cover the filter portion.

[0041] The laminated packaging can cover 20 mm to 35 mm of the aerosol-forming substrate portion in length. If the aerosol-generating article includes a filter portion, the laminated packaging can cover 20 mm to 50 mm of the aerosol-generating article in length. The laminated packaging can cover at least 50%, more preferably at least 70%, and more preferably at least 90% of the length of the aerosol-forming substrate.

[0042] If the laminated packaging is configured to at least partially cover the filter tip portion, optimized insulation can be provided in the filter tip portion. In this regard, aerosols generated by heating the substrate portion of the aerosol-forming substrate containing the aerosol-generating article can be drawn towards the end of the filter tip portion. Insulating the filter tip portion optimizes aerosol retention while allowing aerosol to flow through it. This effect is particularly achieved through the insulation layer of the laminated packaging. Additionally, the thermally conductive layer of the laminated packaging can transfer heat towards the periphery of the filter tip portion. This heat can optimize aerosol retention in the filter tip portion and even contribute to aerosol generation within it. Furthermore, insulating the filter tip portion of the aerosol-generating article advantageously prevents accidental degradation of the filter tip portion due to applied heat.

[0043] The filter tip portion can be formed from any suitable material or combination of materials. For example, the filter tip portion can be formed from one or more materials selected from: cellulose acetate; cardboard; paper, such as curled heat-resistant paper or curled parchment; cotton; viscose fiber; glass fiber; and other polymeric materials, such as low-density polyethylene (LDPE). In a preferred embodiment, the filter tip portion is formed from cellulose acetate.

[0044] The filter tip portion may include a hollow tubular element. In a preferred embodiment, the filter tip portion includes a hollow cellulose acetate tube.

[0045] The filter tip portion preferably has an outer diameter approximately equal to the outer diameter of the aerosol-generating article.

[0046] The outer diameter of the filter tip portion can be between approximately 4 mm and approximately 8 mm, for example, between approximately 5 mm and approximately 6 mm, preferably approximately 5.3 mm. The length of the filter tip portion can be between approximately 10 mm and approximately 25 mm.

[0047] Aerosol-generating articles can be generally cylindrical in shape. However, alternatively, other cross-sections can be used. In practice, the cross-section of an aerosol-generating article can vary along its length, for example, by changing the shape or size of the cross-section. Aerosol-generating articles can be substantially elongated. Aerosol-generating articles can have a length and a circumference substantially perpendicular to said length. Aerosol-forming substrates can be generally cylindrical in shape. Aerosol-forming substrates can be substantially elongated. Aerosol-forming substrates can also have a certain length and a circumference substantially perpendicular to said length.

[0048] The total length of the aerosol-generating article can be between 30 mm and 60 mm, preferably between 40 mm and 50 mm, and more preferably 45 mm. The outer diameter of the aerosol-generating article can be between about 4 mm and 8 mm, preferably between 5 mm and 6 mm, and more preferably about 5.3 mm. In one embodiment, the total length of the aerosol-generating article is about 45 mm. Furthermore, the length of the aerosol-forming substrate can be between 20 mm and 55 mm. Preferably, the aerosol-forming substrate used in the aerosol-generating article is a non-liquid aerosol-forming substrate. As used herein, the term "non-liquid aerosol-forming substrate" refers to a substrate capable of releasing volatile compounds that can form aerosols. Such volatile compounds can be released by heating the aerosol-forming substrate. The aerosol-forming substrate can suitably be part of an aerosol-generating article or a smoking article.

[0049] The aerosol forming substrate is a substrate capable of releasing volatile compounds that can form aerosols. The volatile compounds can be released by heating the aerosol forming substrate. The aerosol forming substrate may contain nicotine. The aerosol forming substrate may contain plant-based materials. The aerosol forming substrate may contain tobacco. The aerosol forming substrate may contain tobacco-containing materials that contain volatile tobacco flavor compounds that are released from the aerosol forming substrate upon heating. Alternatively, the aerosol forming substrate may contain tobacco-free materials. The aerosol forming substrate may contain homogenized plant-based materials, including, for example, homogenized tobacco manufactured through processes such as papermaking or casting. Preferably, the aerosol forming substrate is provided in the form of shredded filler impregnated with an aerosol forming agent.

[0050] The insulation layer may comprise one or more types of paper, preferably cigarette wrapping paper, cotton, or fiberglass. These materials have high thermal insulation properties. Furthermore, these materials are readily available.

[0051] The thickness of the laminated packaging can be between 30 micrometers and 100 micrometers, preferably between 50 micrometers and 70 micrometers, more preferably between 55 micrometers and 58 micrometers, and even more preferably about 56.5 micrometers.

[0052] Throughout the document, the term "about" explains an inherent variation of up to ±2 on the last digit. For example, the term "about 56.5 micrometers" could include a range of 56.3 to 56.7 micrometers. Alternatively, the term "about" could include an uncertainty of up to 5%, whichever is greater.

[0053] The thickness of laminated packaging can accommodate both insulating and thermally conductive layers. Furthermore, it allows for dimensional stability of the laminated packaging.

[0054] The thickness of the thermally conductive layer can be between 4 micrometers and 25 micrometers, preferably between 5 micrometers and 10 micrometers, more preferably between 6 micrometers and 7 micrometers, and even more preferably about 6.5 micrometers.

[0055] The thickness of the conductive layer can optimize heat distribution. The thickness of the conductive layer enables axial heat transfer through the conductive layer as well as radial-inward heat transfer towards the aerosol forming substrate.

[0056] The thickness of the insulation layer can be between 25 micrometers and 75 micrometers, preferably between 40 micrometers and 60 micrometers, and more preferably about 50 micrometers.

[0057] The thickness of the insulation layer can optimize insulation. Insulation layers can be used to increase the structural integrity of laminated packaging. Insulation layers can also form supports for thermally conductive layers.

[0058] An insulating layer may be arranged around a heat-conducting layer. Heat can be trapped inside the aerosol-generating article by the insulating layer surrounding the heat-conducting layer. Preferably, the insulating layer is the outermost layer of the aerosol-generating article.

[0059] Aerosol-generating articles can have asymmetrical cross-sections. The term "asymmetrical cross-section" refers to the profile or cross-section of an aerosol-generating article that allows it to be inserted into the heating chamber of an aerosol-generating apparatus in a specific orientation or multiple specific orientations. In this case, the heating chamber will preferably have a corresponding cross-section, which will be described in more detail below with respect to the aerosol-generating apparatus. A circular cross-section is not an asymmetrical cross-section. According to the invention, a rectangular cross-section can be considered an asymmetrical cross-section. A rectangular cross-section may allow insertion of the aerosol-generating article in only two or four orientations. If the cross-section of the aerosol-generating article is square, four orientations will be enabled; otherwise, two orientations will be enabled. The cross-section of the aerosol-generating article can also have a shape such that the aerosol-generating article inserted into a heating chamber of the corresponding shape can only be inserted in a single orientation. Insertion that is allowed only in one or more specific orientations can also be described as a keyed configuration of the aerosol-generating article. The term "asymmetrical cross-section" ignores the inherent structure of the aerosol-forming substrate, particularly the random orientation of the filament filler strips, when considering symmetry.

[0060] Laminated packaging may include multiple thermally conductive layers overlapping each other in the axial direction of the aerosol-forming article. According to this aspect, different heating zones of the aerosol-forming article are defined when viewed from the axial direction. Different numbers of conductive layers may overlap in different heating zones. Preferably, a single thermally conductive layer can be provided in the first heating zone. This first heating zone can be configured similarly to the heating zones described above. In this first heating zone, preferably, only a single thermally conductive layer is provided, without a laminated packaging including an insulating layer. In the second heating zone, two thermally conductive layers may be provided adjacent to each other in the radial direction of the aerosol-forming article. In other words, two thermally conductive layers may cover the aerosol-forming substrate in the second heating zone. The effect of providing multiple thermally conductive layers is that heat transfer from the outside of the aerosol-forming article to the interior of the aerosol-forming article with the aerosol-forming substrate may take longer. Therefore, staged heating can be provided through these different heating zones. Of course, more than two heating zones can be provided. For example, a third heating zone can be provided, in which three thermally conductive layers are arranged around the aerosol-forming substrate. More than three heating zones can be provided. Preferably, each additional heating zone includes an additional heat-conducting layer. The heat-conducting layer of the first heating zone may extend over all heating zones. The heat-conducting layer of the second heating zone may extend over the second heating zone and all other heating zones, but not over the first heating zone. This allows for a relatively simple arrangement where multiple heating zones are provided to achieve a staged heating effect. The staged heating effect can create heating delays in different heating zones of the aerosol-generating article. Therefore, gradual evaporation of the aerosol-forming substrate can be achieved in the heating zones. A single pumping operation can be provided with one heating zone, thereby achieving optimized substrate evaporation for each pumping operation. The aerosol-generating article can be configured for a specific number of pumping operations, and the number of heating zones can correspond to that specific number of pumping operations.

[0061] As a supplement to or alternative to providing multiple thermally conductive layers, multiple insulating layers can be provided. The multiple heating zones described above may include multiple insulating layers. The laminated packaging may include a fixed total number of layers. In each of the multiple heating zones, the total number of layers may correspond to the total number of layers in the laminated packaging. For example, if the laminated packaging includes four layers, an insulating zone may be provided in which only four insulating layers are arranged. In the first heating zone, a single thermally conductive layer and three insulating layers may be provided. In the second heating zone, two thermally conductive layers and two insulating layers may be provided. In the third heating zone, three thermally conductive layers and one insulating layer may be provided. Finally, in the fourth heating zone, four thermally conductive layers may be provided without insulating layers. Of course, this example should be understood as exemplary only. Fewer or more heating zones may be provided as needed. If insulating layers are provided in the heating zones as described herein, the heating zone with the maximum number of thermally conductive layers and the minimum number of insulating layers may transfer the maximum amount of heat energy from the exterior of the aerosol-generating article to the interior of the aerosol-generating article in which the aerosol-forming substrate is arranged. Each successive heating zone, with a reduced number of thermally conductive layers and an increased number of thermally insulating layers, may transfer less heat from the exterior to the interior of the aerosol-generating article. For example, if the heating element of the aerosol-generating apparatus uniformly heats the exterior of the aerosol-generating article, heat will gradually reach the interior to generate an inhalable aerosol. This effect may be necessary to produce a staged heating effect. Additionally, by providing a laminated package with a fixed number of layers, the thickness of the laminated package and therefore the diameter of the aerosol-generating article can be kept constant.

[0062] The thermally conductive layer may include one or more of the following: holes, rings, spirals, and spirals with varying widths, axial dimensions, and radial thicknesses.

[0063] Different shapes of heat-conducting layers can achieve different heating methods. These different shapes of heat-conducting layers can be advantageously used to optimize the evaporation of the aerosol-forming substrate. If multiple heat-conducting layers are provided, each heat-conducting layer can have a desired shape, which can be similar to or different from the shapes of the other heat-conducting layers. An insulating layer of the laminated packaging can be provided that partially covers the heat-conducting layers, such that the shape of the heat-conducting layers not covered by the insulating layer can be different. For example, the annular shape of the heat-conducting layer can be achieved in a uniform form where the heat-conducting layer is partially covered by the insulating layer, so that the annular portion of the heat-conducting layer is not covered by the insulating layer. The same method can be used for other heat-conducting layers as described above. Alternatively, the heat-conducting layer itself can have this shape. If the heat-conducting layer has an axial variation, preferably, the shapes of the heating regions as described above are different from each other. For example, a first heating region can have an annular shape with a relatively small axial length, followed by a second heating region with a longer axial length. For example, the actual length of the first heating region can be about 1 mm, and the axial length of the second heating region can be about 2 mm. This should only be understood as exemplary. One or more heating zones can be selected with any desired axial length and shape. Variations in the radial thickness of the heat-conducting layer mean that the heat-conducting layer does not have a uniform thickness. In some embodiments, the thickness of the heat-conducting layer can vary along its axial length. Specifically, the different heating zones described above can be a single heat-conducting layer with varying thicknesses, rather than multiple heat-conducting layers. Similarly, the thickness of the insulation layer can vary if desired.

[0064] The present invention also relates to an aerosol generating apparatus comprising a heating chamber and heating elements arranged adjacent to the heating chamber. As described above, the heating chamber is configured for inserting an aerosol generating article. When the aerosol generating article is inserted into the heating chamber, the heating elements are configured to heat a heating region of the aerosol generating article, wherein only a heat-conducting layer is arranged in the heating region.

[0065] The heating chamber may have a cylindrical shape for inserting the aerosol-generating article. The heating chamber may be a cavity. The heating chamber may have a circular profile or a cross-section. As described above, if the aerosol-generating article has an asymmetrical profile, the heating chamber preferably has a corresponding asymmetrical profile. For example, if the aerosol-generating article has a rectangular profile, the heating chamber preferably has a rectangular profile. If the aerosol-generating article has an asymmetrical profile configured such that the asymmetrical profile allows the aerosol-generating article to be inserted into the heating chamber only along a single orientation, the heating chamber preferably has a corresponding cross-section. For example, the aerosol-generating article may include grooves, nuts, shoulders, or similar elements along the length of the aerosol-generating article, and on the exterior of the aerosol-generating article, the heating chamber may include corresponding grooves, nuts, shoulders, or similar elements to engage with elements of the aerosol-generating article, thereby allowing the aerosol-generating article to be inserted along a single specific orientation.

[0066] Heating elements may be arranged inside or around the heating chamber for heating aerosol-forming articles that can be inserted into the heating chamber. Alternatively or additionally, internal heating elements, such as pins or blades, may be provided, which are inserted to be at least partially used in the aerosol-forming substrate.

[0067] For example, the device may include an external heating element positioned around the periphery of the heating chamber. The external heating element can take any suitable form. For example, the external heating element may take the form of one or more flexible heating foils on a dielectric substrate (e.g., polyimide). The flexible heating foil may be shaped to conform to the periphery of the heating chamber. Alternatively, the external heating element may take the form of a metal mesh, flexible printed circuit board, molded interconnect device (MID), ceramic heating element, flexible carbon fiber heating element, or may be formed on a suitable molded substrate using coating techniques such as plasma vapor deposition. The external heating element may also be formed using a metal having a defined relationship between temperature and resistivity. In such exemplary devices, the metal may be formed as traces between two layers of suitable insulating material. An external heating element formed in this way can be used to heat and monitor the temperature of the external heating element during operation. The heating element may be configured to heat to a temperature of approximately 200 degrees Celsius. The heating element may also be configured as an induction heating element, in which case the heating element preferably includes an induction coil. In this embodiment, the aerosol forming substrate of the aerosol generating article may include a sensor material for generating heat within the aerosol forming substrate. Alternatively, in this embodiment, when the aerosol generating article is inserted into a heating chamber, a sensor material, for example in the shape of a leaf or pin, may be arranged inside the heating chamber to penetrate the aerosol forming substrate of the aerosol generating article.

[0068] Heating elements can be arranged around the heating chamber to uniformly heat the chamber. This can serve to uniformly heat the aerosol-generating article, particularly its substrate portion, when it is inserted into the heating chamber. As described above, the laminated packaging surrounding the aerosol-generating article can have a specific structure to allow for staged heating of the aerosol-forming substrate within the article. Specifically, the laminated packaging can create distinct heating zones. These distinct heating zones can be particularly utilized when the aerosol-generating article is uniformly heated from the outside by heating elements arranged around the heating chamber.

[0069] Alternatively, when the aerosol-generating article is inserted into the heating chamber, the heating element can be configured to heat specific areas of the aerosol-generating article. For this purpose, the heating element may include multiple individually controllable heating sections. These individually controllable heating sections may be arranged along the longitudinal length of the heating chamber to heat individual segments of the aerosol-generating article. Preferably, the individually controllable heating sections are configured to heat different heating areas of the aerosol-generating article. Each individually controllable heating section may completely surround the heating chamber. The individually controllable heating sections may be electrically controlled, as will be described in more detail below. Alternatively or additionally, the individually controllable heating sections may be arranged parallel to the longitudinal axis of the heating chamber. Instead of individually controllable heating sections, the heating element may be configured to generate a heating gradient during heating. The heating element may be configured to generate a heating gradient parallel to the longitudinal axis of the heating chamber.

[0070] When the aerosol-generating article is inserted into the heating chamber, the heating element can be configured to radiate heat toward the aerosol-generating article. The heat can be optimally absorbed and transferred through the thermally conductive layer of the laminated packaging of the aerosol-generating article. The heat can be radiated or transferred through the thermally conductive layer to the aerosol-forming substrate of the aerosol-generating article. This effect is particularly useful if the heat source does not apply heat uniformly. Therefore, the thermally conductive layer can transfer heat from the heat source along the aerosol-generating substrate and, where necessary, distribute the heat evenly across the entire aerosol-generating substrate, provided the thermally conductive layer covers it uniformly. Alternatively, the heat from the heat source can be selectively distributed across the entire aerosol-generating substrate, where the thermally conductive layer does not completely cover the entire aerosol-generating substrate.

[0071] As used herein, an "aerosol generating apparatus" relates to a device that interacts with an aerosol forming substrate to generate an aerosol. The aerosol forming substrate may be part of an aerosol generating article. An aerosol generating apparatus may be a device that interacts with the aerosol forming substrate of an aerosol generating article to generate an aerosol. An aerosol generating apparatus may include a housing, circuitry, a power supply, a heating chamber, and a heating element. An aerosol generating apparatus may optionally include a mouthpiece end.

[0072] The circuit may include a microprocessor, which may be a programmable microprocessor. The microprocessor may be part of a controller. The circuit may include additional electronic components. The circuit may be configured to regulate the power supply to the heating element. Power may be continuously supplied to the heating element after the system is activated, or it may be supplied intermittently, such as on a pump-and-drain basis. Power may be supplied to the heating element in the form of current pulses. The circuit may be configured to monitor the resistance of the heating element and preferably control the power supply to the heating element based on the resistance of the heating element.

[0073] The device may include a power source, typically a battery, within its main body. Alternatively, the power source may be another form of charge storage device, such as a capacitor. The power source may require charging and may have a capacity capable of storing enough energy for one or more uses; for example, the power source may have a capacity sufficient to continuously generate aerosol for approximately six minutes or multiples of six minutes. In another instance, the power source may have a capacity sufficient to generate aerosol for multiple aspirations.

[0074] The power source can be any suitable power source, such as a DC voltage source, or a battery. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source can be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery such as a lithium-cobalt, lithium-iron-phosphate, lithium titanate, or lithium-polymer battery.

[0075] The aerosol generating device may include a mouthpiece end. The mouthpiece end may be a separate component or integrally formed with the aerosol generating device. The mouthpiece end may be connectable, or preferably connected to the aerosol generating device via a hinge. The mouthpiece end may be configured as a venturi element. The mouthpiece end may be configured to connect to an aerosol generating article. The mouthpiece end may be configured to be inserted into a filter portion of the aerosol generating article.

[0076] The present invention also relates to a system comprising an aerosol generating apparatus and an aerosol generating article as described herein. The present invention further relates to a system comprising an aerosol generating article and a mouthpiece end as described herein, preferably a venturi element. The present invention also relates to a system comprising an aerosol generating apparatus, an aerosol generating article, and a mouthpiece end.

[0077] The present invention also relates to a method for manufacturing aerosol-generating articles, wherein the method may include the following steps:

[0078] i. Providing an aerosol generating article comprising an aerosol forming substrate, wherein the aerosol forming substrate comprises shredded plant material filler, and wherein the shredded plant material filler comprises at least 25% plant leaves by weight of the total plant material, and wherein the aerosol forming substrate further comprises an aerosol forming agent between about 6% and about 20%; and

[0079] ii. A laminated package is at least partially wrapped around an aerosol-forming substrate, wherein the laminated package includes a thermally conductive layer and a thermally insulating layer, and wherein the thermally conductive layer and the thermally insulating layer overlap along the axial direction of the aerosol-forming article.

[0080] The method may include the step of inserting the aerosol-generating article into the heating chamber of the aerosol-generating apparatus. The method may also include the step of heating the aerosol-generating article.

[0081] Features described in relation to one aspect can be equally applied to other aspects of the invention. Attached Figure Description

[0082] The invention will be further described by way of example only with reference to the accompanying drawings, in which:

[0083] Figure 1 A cross-sectional view of an aerosol-generated article inserted into the heating chamber of an aerosol-generating apparatus is shown.

[0084] Figure 2 Different embodiments of the thermally conductive layer of laminated packaging for aerosol-generated articles are shown; and

[0085] Figure 3 A cross-sectional view of an embodiment of a laminated package having multiple thermally conductive layers and multiple thermally insulating layers is shown. Detailed Implementation

[0086] Figure 1 An aerosol generating article 10 is shown. The aerosol generating article 10 has been inserted into the heating chamber 12 of the aerosol generating apparatus 14. The aerosol generating article 10 includes a substrate portion 16 comprising an aerosol forming substrate. Figure 1 In the illustrated embodiment, the aerosol generating article 10 further includes a filter tip portion 18 in the form of a hollow acetate tube. The filter tip portion 18 is disposed downstream of the substrate portion 16. The filter tip portion 18 is optional.

[0087] Figure 1A laminated package 20 is shown, which wraps around the substrate portion 16 and the filter portion 18 of the aerosol-forming article 10. If the filter portion 18 is not provided, the laminated package 20 only wraps around the substrate portion 16. The laminated package 20 includes a thermally conductive layer 22 and a thermally insulating layer 24. The thermally conductive layer 22 is disposed internally, meaning it is directly adjacent to the aerosol-forming substrate or the filter portion 18. The thermally insulating layer 24 is arranged to wrap around the thermally conductive layer 22.

[0088] The heat insulation layer 24 and the heat-conducting layer 22 overlap along the longitudinal length of the aerosol-generated article 10. Figure 1 In the illustrated embodiment, the bottom portion of the aerosol generating article 10, i.e., the upstream end 26 of the aerosol generating article 10, is only covered by the thermally conductive layer 22. Therefore, the substrate portion 16 is covered by the thermally conductive layer 22. At the top portion of the aerosol generating article 10, i.e., the downstream end 28 of the aerosol generating article 10, a filter tip portion 18 is provided. The filter tip portion 18 is only covered by the heat-insulating layer 24 of the laminated packaging 20. Between the portion of the substrate portion 16 adjacent to the upstream end 26 of the aerosol generating article 10 and the portion of the filter tip portion 18 adjacent to the downstream end 28 of the aerosol generating article 10, the laminated packaging 20 covering the aerosol generating article 10 includes both the thermally conductive layer 22 and the heat-insulating layer 24.

[0089] like Figure 1 As shown, when the aerosol generating article 10 is inserted into the aerosol generating apparatus 14, the heating element 30 of the aerosol generating apparatus 14 can be arranged near the upstream end 26 of the aerosol generating article 10 adjacent to the heat-conducting layer 22. This area of ​​the aerosol generating article 10 covered only by the heat-conducting layer 22 is configured as the heating region 32. In this region, the heat dissipated by the heating element 30 is directly transmitted to the heat-conducting layer 22 of the laminated packaging 20. Therefore, the heat is absorbed by the heat-conducting layer 22 and further transferred to the aerosol forming substrate contained within the aerosol generating article 10. Furthermore, the heat absorbed by the heat-conducting layer 22 is transferred within the heat-conducting layer 22 along the axial direction of the aerosol generating article 10, thereby achieving uniform heating. In other words, compared to the entire size of the substrate portion 16 of the aerosol generating article 10, a relatively small heating element 30 can be provided to heat a relatively small heating region 32 of the aerosol generating article 10. Moreover, thanks to the high thermal conductivity of the heat-conducting layer 22, heat can be evenly distributed on the substrate portion 16 of the aerosol generation article 10.

[0090] The heating element 30 may alternatively be arranged around the entire heating chamber 12 or most of the heating chamber 12 in order to achieve more uniform heating of the aerosol-generating article 10.

[0091] When heat reaches the interior of the aerosol-generating article 10 via the heat-conducting layer 22, the heat-insulating layer 24 absorbs the heat from inside the aerosol-generating article 10. For example... Figure 1 As can be seen, the insulation layer 24 preferably extends over the filter portion 18 arranged adjacent to the downstream end 28 of the aerosol generating article 10. This prevents heat from dissipating at a reduced rate in the region of the filter portion 18. This function improves aerosol formation and stabilizes the aerosol when aerosol is drawn from the substrate portion 16 through the filter portion 18 during the suction process.

[0092] In order to operate the aerosol generating device 14 Figure 1 Other components of the aerosol generating apparatus 14 are shown. In this respect, the aerosol generating apparatus 14 includes a power supply 34, preferably a battery, for powering the heating element 30. The supply of electrical energy from the power supply 34 to the heating element 30 is controlled by a circuit 36.

[0093] As will be discussed below Figure 2 and Figure 3 As explained, a phased heating effect can be achieved by generating the laminated packaging 20 of the product 10 using aerosol. Figure 2 Different embodiments of the laminated packaging 20, and more specifically the thermally conductive layer 22 of the laminated packaging 20, are shown. Figure 2 The top portion shows one embodiment in which holes 38 are provided in the thermally conductive layer 22. The holes 38 can alter the heat transfer characteristics of the thermally conductive layer 22. For example... Figure 2 As shown in the top portion, in the left-hand portion of the aerosol-generating article 10, more holes 38 can be provided in the upstream region of the substrate portion 16 compared to the downstream region. Therefore, a heating region 32 can be achieved, in which the aerosol-generating substrate is heated faster or slower. Thus, a staged heating effect can be achieved.

[0094] Figure 2 The middle portion illustrates one embodiment in which the thermally conductive layer 22 is configured to have an annular shape. Multiple heating zones 32 are provided by multiple annular rings surrounding the circumference of the aerosol forming substrate. The portions between the heating zones 32 may be covered by one or more insulating layers 24.

[0095] Figure 2 The bottom portion shows one embodiment in which the thermally conductive layer 22 has a helical configuration. This embodiment can be achieved by providing a strip of the thermally conductive layer 22 and wrapping the strip around the aerosol forming substrate. Alternatively, a continuous thermally conductive layer 22 can be provided, wherein portions between the helical portions of the thermally conductive layer 22 can be covered by one or more insulating layers 24. The helical portions of the thermally conductive layer 22 can realize the heating region 32 of the aerosol forming article 10.

[0096] Figure 3 Another embodiment of the laminated packaging 20 is shown, wherein multiple insulating layers 24 and multiple thermally conductive layers 22 are provided. When the aerosol generating article 10 is inserted into the heating chamber 12, if the heating element 30 of the aerosol generating device 14 uniformly heats the area around the aerosol generating article 10, then Figure 3 The illustrated implementation scheme is particularly advantageous. Provided Figure 3 The multi-layered laminated packaging 20 shown creates multiple heating zones. Figure 3 The left side of the laminated package 20 shown illustrates a first heating zone 40, in which three heat-conducting layers 22 are disposed. In this zone, heat can quickly pass through the heat-conducting layers 22 and enter the thermoforming substrate contained within the heat-generating article. The middle portion of the laminated package 20 shows a second heating zone 42, in which two heat-conducting layers 22 are arranged around the aerosol-forming substrate, while a single insulating layer 24 is arranged around the two heat-conducting layers 22. Due to the insulating layer 24, this second heating zone 42 will take longer to heat up. If all heating zones are uniformly heated by the heating element 30 of the aerosol generating device 14, a staged heating effect can be achieved, such as... Figure 3 As shown by the arrows, these arrows indicate the direction of heat. The first heating zone 40 can heat up faster than the second heating zone 42. Figure 3 The right side shows a third heating region 44, which has only a single heat-conducting layer 22 and two heat-insulating layers 24. This heating region will heat up more slowly than the second heating region 42.

Claims

1. An aerosol-generating article (10), comprising: An aerosol forming substrate, wherein the aerosol forming substrate comprises shredded plant material filler, and wherein the aerosol forming substrate further comprises an aerosol forming agent between 6% and 20%. A laminated package (20) is arranged to at least partially surround the aerosol forming substrate, wherein the laminated package (20) includes a thermally conductive layer (22) and a thermally insulating layer (24). Wherein, the heat-conducting layer (22) and the heat-insulating layer (24) overlap along the axial direction of the aerosol-generating article (10); wherein, at least a portion of the laminated packaging includes a heat-conducting layer arranged adjacent to the heat-insulating layer in the radial direction, and at least different portions of the laminated packaging, other than the at least a portion, include only a heat-conducting layer or only a heat-insulating layer in the radial direction.

2. The aerosol-generating product according to claim 1, wherein, The thermally conductive layer (22) comprises aluminum.

3. The aerosol-generating product according to claim 1, wherein, The insulation layer (24) comprises paper.

4. The aerosol-generating product according to claim 3, wherein, The paper in question is cigarette packaging paper.

5. The aerosol-generating product (10) according to claim 1, wherein, The thickness of the laminated packaging (20) is between 30 micrometers and 100 micrometers.

6. The aerosol-generating article (10) according to claim 5, wherein, The thickness of the laminated packaging (20) is between 50 micrometers and 70 micrometers.

7. The aerosol-generating article (10) according to claim 6, wherein, The thickness of the laminated packaging (20) is between 55 micrometers and 58 micrometers.

8. The aerosol-generating article (10) according to claim 7, wherein, The thickness of the laminated packaging (20) is approximately 56.5 micrometers.

9. The aerosol-generating product (10) according to claim 1, wherein, The insulation layer (24) is arranged around the heat-conducting layer (22).

10. The aerosol-generating article (10) according to claim 1, wherein, The aerosol-generated product is a heat-non-combustible product.

11. The aerosol-generating article (10) according to claim 1, wherein, The thermally conductive layer is arranged to be directly adjacent to the aerosol-forming substrate of the aerosol-generating article, and wherein the thermal insulation layer is arranged to be directly adjacent to the thermally conductive layer.

12. The aerosol-generating article (10) according to claim 1, wherein, The thermally conductive layer is impermeable to gas.

13. The aerosol-generating article (10) according to claim 1, wherein, The filament length of the filler allows 20% to 60% of the filaments to extend along the entire length of the substrate portion.

14. The aerosol-generating article (10) according to claim 1, wherein, The weight of the aerosol forming substrate is between 80 mg and 400 mg.

15. The aerosol-generating article (10) according to claim 14, wherein, The weight of the aerosol forming substrate is between 150 mg and 250 mg.

16. The aerosol-generating article (10) according to claim 15, wherein, The weight of the aerosol forming substrate is between 170 mg and 220 mg.

17. The aerosol-generating article (10) according to claim 1, wherein, Aerosol generating articles include a substrate portion comprising an aerosol forming substrate and a hollow tubular filter tip portion.

18. The aerosol-generating article (10) according to claim 17, wherein, The hollow tubular filter tip includes a hollow acetate tube.

19. The aerosol-generating article (10) according to claim 17, wherein, The aerosol-generating article includes an additional filter section.

20. The aerosol-generating article (10) according to claim 19, wherein, The additional filter section includes cellulose acetate.

21. The aerosol-generating article (10) according to claim 1, wherein, The laminated packaging covers at least 90% of the length of the aerosol forming substrate.

22. The aerosol-generating article (10) according to claim 21, wherein, The laminated packaging completely covers the aerosol-forming substrate portion.

23. The aerosol-generating article (10) according to claim 1, wherein, The amount of the aerosol forming agent is between 8% by weight and 18% by weight based on the dry weight of the aerosol forming substrate.

24. The aerosol-generating article (10) according to claim 23, wherein, The amount of the aerosol forming agent is between 10% and 15% by weight based on the dry weight of the aerosol forming substrate.

25. An aerosol generation system, comprising an aerosol generation apparatus and an aerosol generation article according to any one of claims 1-24, wherein the aerosol generation apparatus comprises: Heating chamber, and Heating elements are arranged adjacent to the heating chamber. The heating chamber is configured for inserting the aerosol generating article, wherein when the aerosol generating article is inserted into the heating chamber, the heating element is configured to heat the heating region of the aerosol generating article, wherein only a heat-conducting layer is arranged in the heating region.

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