Method for preparing an aerosol-forming substrate

Abstract

Disclosed herein is a method of making an aerosol-forming substrate (103), the aerosol-forming substrate comprising an aerosol-forming layer attached to a carrier layer. The aerosol-forming layer comprises an amorphous solid. The method includes the steps of: (a) forming a slurry comprising components of the amorphous solid or precursors thereof; (b) applying the slurry to a carrier, the carrier comprising a hardener, such that the slurry gels upon contact with the carrier; and (c) drying the gel to form the amorphous solid. [Selected Figure] Figure 1

Description

[Technical field]

[0001] The present invention relates to the generation of aerosols. [Background technology]

[0002] Smoking articles, such as cigarettes, cigars, and the like, burn tobacco to produce tobacco smoke during use. Alternatives to these types of articles release compounds from a substrate material by heating without combustion, thereby releasing an inhalable aerosol or vapor. These are sometimes referred to as non-combustion smoking articles or aerosol-generating assemblies.

[0003] One example of such a product is a heating device that releases a compound by heating but not burning a solid aerosolizable material. The solid aerosolizable material may, in some examples, include tobacco material. The heating volatilizes at least one component of the material, typically forming an inhalable aerosol. These products are sometimes referred to as heat not burn devices, tobacco heating devices, or tobacco heating products. A variety of different configurations are known for volatilizing at least one component of a solid aerosolizable material.

[0004] Another example is an e-cigarette / tobacco heating product hybrid device, also known as an e-cigarette hybrid device. These hybrid devices include a liquid source (which may or may not contain nicotine) that is vaporized by heating to produce an inhalable vapor or aerosol. The device further includes a solid aerosolizable material (which may or may not contain tobacco material), the components of which are entrained in the inhalable vapor or aerosol to produce the inhalation medium. Summary of the Invention

[0005] A first aspect of the present invention provides a method of making an aerosol-forming substrate, the aerosol-forming substrate comprising an aerosol-forming layer attached to a carrier layer, the aerosol-forming layer comprising an amorphous solid. The method comprises: (a) forming a slurry comprising amorphous solid components or precursors thereof; (b) applying the slurry to a carrier, the carrier comprising a hardener such that the slurry gels upon contact with the carrier; (c) drying the gel to form an amorphous solid; Equipped with.

[0006] The present invention also provides an aerosol-forming substrate obtainable or obtained by the method of the first aspect.

[0007] The invention also provides an aerosol-forming substrate comprising an aerosol-forming layer attached to a carrier layer, where the aerosol-forming layer comprises an amorphous solid and the carrier is a layer of tobacco material. The invention also provides an aerosol product article and an assembly comprising such a substrate. Further aspects of the invention described herein may provide for the use of such an aerosol-forming substrate, aerosol product article or aerosol-generating assembly in the generation of an inhalable aerosol.

[0008] Further characteristics and advantages of the invention will become apparent from the following description, given by way of example only with reference to the accompanying drawings, in which: [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view of an example of an aerosol product. [Diagram 2] FIG. 2 is a perspective view of the article of FIG. [Diagram 3] FIG. 2 is a cross-sectional elevation view of an example of an aerosol product. [Figure 4] FIG. 4 is a perspective view of the article of FIG. [Diagram 5]FIG. 1 is a perspective view of an example of an aerosol generation assembly. [Figure 6] FIG. 1 is a cross-sectional view of an example of an aerosol generation assembly. [Figure 7] FIG. 1 is a perspective view of an example of an aerosol generation assembly. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The aerosol-forming layer described herein comprises an "amorphous solid." An amorphous solid may also be referred to as a "monolithic solid" (i.e., non-fibrous) or a "dry gel." An amorphous solid is a solid material that may retain some fluid, e.g., liquid, within it. In some examples, the aerosol-forming layer comprises from 50%, 60%, or 70% to about 90%, 95%, or 100% amorphous solid by weight. In some examples, the aerosol-forming layer consists of an amorphous solid.

[0011] As mentioned above, the present invention provides a method of making an aerosol-forming substrate, the aerosol-forming substrate comprising an aerosol-forming layer attached to a carrier layer, the aerosol-forming layer comprising an amorphous solid. The method comprises: (a) forming a slurry comprising amorphous solid components or precursors thereof; (b) applying the slurry to a carrier, the carrier comprising a hardener such that the slurry gels upon contact with the carrier; (c) drying the gel to form an amorphous solid; Equipped with.

[0012] The inventors have discovered that by placing the hardener on a carrier, the manufacture of the aerosol-forming substrate is simplified: the slurry can be formed and stored for extremely long periods of time without deteriorating, hardening, gelling, or drying out.

[0013] The slurry may be applied to the carrier by, for example, casting, extrusion, or spraying. In some instances, the slurry is applied by electrostatic spraying. In some instances, the slurry is applied by casting.

[0014] In some examples, the slurry has a viscosity of about 10 to about 20 Pa·s at 46.5°C, such as a viscosity of about 14 to about 16 Pa·s at 46.5°C.

[0015] In some instances, steps (b) and (c) may occur at least partially simultaneously (e.g., during electrostatic spraying). In some instances, these steps may occur sequentially.

[0016] The carrier comprises a hardener at least at the surface where the slurry is applied, in some instances the hardener may be present only at or on this surface, in other instances the hardener may be present along, and preferably throughout, the depth of the carrier.

[0017] In some instances, the portion of the carrier that abuts the slurry / amorphous solid may be porous. The inventors have found that such carriers are particularly suitable for the present invention, as a strong bond is formed between the porous carrier and the amorphous solid layer. The amorphous solid is formed by drying a gel, and, without being limited by theory, it is believed that the gel-forming slurry partially impregnates the porous carrier, such that the carrier is partially bonded to the gel as the gel cures and forms crosslinks. This impregnation also allows for effective interaction between the curing agent and the slurry. In some instances, the carrier may comprise paper.

[0018] In some instances, the stiffening agent comprises a calcium source, which causes gelling of the slurry, for example, with pectin or alginate.

[0019] In some instances, the carrier comprises a tobacco material containing a hardening agent. In some instances, the carrier comprises a sheet of tobacco material. In some instances, the tobacco material is reconstituted tobacco. The reconstituted tobacco may comprise 0.2-15% by weight calcium, preferably about 0.5-7% by weight calcium.

[0020] The total amount of hardener may be 0.5-5% by weight (calculated on a dry weight basis) based on the dry weight of the slurry to which it is added. The inventors have found that adding too little hardener may result in a gel that does not stabilize the gel components, leading to these components dropping out of the gel. The inventors have found that adding too much hardener results in a gel that is very sticky and therefore difficult to handle.

[0021] Suitably, the weight ratio of hardener to gelling agent may be from about 1:5 to 1:15, preferably about 1:10.

[0022] Alginates are derivatives of alginic acid and are typically high molecular weight polymers (10-600 kDa). Alginic acid is a copolymer of β-D-mannuronic acid (M) and α-L-guluronic acid (G) units (blocks) linked by (1,4)-glycosidic bonds to form a polysaccharide. When calcium cations are added, alginates crosslink to form a gel. The inventors have determined that alginates having a high G monomer content form gels more readily upon addition of a calcium source. Thus, in some examples, the gel precursor may comprise an alginate in which at least about 40%, 45%, 50%, 55%, 60%, or 70% of the monomer units in the alginate copolymer are α-L-guluronic acid (G) units.

[0023] In some examples, the slurry is applied to the carrier as a layer between 0.5 mm and 3.0 mm thick. The drying step may reduce the thickness of the slurry by at least 80%, preferably 85% or 87%. For example, the slurry may be cast to a thickness of 0.5 to 2 mm, and the resulting dry amorphous solid material may have a thickness of about 0.015 mm to about 1.0 mm. Preferably, the thickness of the dry amorphous solid material may range from about 0.05 mm, 0.1 mm, or 0.15 mm to about 0.5 mm or 0.3 mm. The inventors have found that a material having a thickness of 0.2 mm is particularly suitable. The amorphous solid may comprise two or more layers, and the thicknesses described herein refer to the combined thicknesses of these layers.

[0024] The inventors have found that the thickness of the slurry is important: if the slurry is too thick, the hardener from the carrier will not penetrate the slurry sufficiently to cause gelation throughout the entire depth of the slurry; furthermore, if the resulting aerosol-generating solid amorphous material is too thick, heating efficiency may be compromised.

[0025] In some instances, the carrier may be substantially or completely impermeable to gases and / or aerosols. This prevents the aerosol or gas from passing through the carrier, thereby controlling the flow and ensuring good delivery to the user. This may also be utilized to prevent the gas / aerosol from condensing or otherwise depositing during use, for example on the surface of a heater provided in the aerosol generating assembly. In this way, consumption efficiency and hygiene may be improved in some instances.

[0026] The carrier may be any suitable material that can be used to support an amorphous solid. In some examples, the carrier may be formed from a material selected from metal foil, paper, carbon paper, greaseproof paper, ceramic, carbon allotropes (e.g., graphite and graphene), plastic, cardboard, wood, or a combination thereof. In some examples, the carrier may be formed from a material selected from metal foil, paper, cardboard, wood, or a combination thereof. In some examples, the carrier itself is a laminated structure comprising multiple layers of materials selected from the aforementioned list. In some examples, the carrier may also function as a flavor carrier. For example, the carrier may be impregnated with flavorings or tobacco extracts.

[0027] In some examples, the carrier may be magnetic. This feature may be used to secure the carrier to an assembly during use or to generate a particular amorphous solid form. In some examples, the aerosol-generating material may include one or more magnets that can be used to secure the material to an induction heater during use.

[0028] In one example, the carrier may have a porous layer in contact with the slurry / amorphous solid (providing a strong bond as described above) and an impermeable layer on the opposite side of the porous layer from the slurry / amorphous solid (providing control of the aerosol flow path as described above).

[0029] In addition, surface roughness may contribute to the strength of the bond between the amorphous material and the carrier. The inventors have found that the roughness of the paper (at the surface abutting the carrier) may preferably be in the range of 50-1000 Bekk seconds, preferably 50-150 Bekk seconds, preferably 100 Bekk seconds (measured over an air pressure interval of 50.66-48.00 kPa). (The Bekk smoothness tester is an instrument used to measure the smoothness of a paper surface. In this tester, air at a specific pressure is inserted between a smooth glass surface and a paper sample. The time (in seconds) for a fixed volume of air to penetrate between these surfaces is the "Bekk smoothness").

[0030] Conversely, the surface of the carrier that does not face the amorphous solid may be placed in contact with the heater, and the smoother surface may provide more efficient heat transfer. Thus, in some examples, the carrier is positioned to have a rougher side that abuts the amorphous material and a smoother side that does not face the amorphous material.

[0031] In some embodiments, the method of the first aspect may further comprise the step of chopping the amorphous solid and carrier layer to form a chopped aerosol-forming substrate.

[0032] The slurry itself may also form part of the present invention. In some instances, the slurry solvent may consist essentially of or consist of water. In some instances, the slurry may comprise about 50%, 60%, 70%, 80%, or 90% or more solvent by weight (WWB).

[0033] In instances where the solvent comprises water, the dry weight content of the slurry may match the dry weight content of the amorphous solids. Thus, any discussion herein regarding the composition of solids is expressly disclosed in conjunction with the slurry aspects of the invention.

[0034] Composition of amorphous solids In some instances, the amorphous solid may comprise 1-60% by weight of gelling agent, where these weights are calculated on a dry weight basis.

[0035] Suitably, the amorphous solid may comprise from about 1%, 5%, 10%, 15%, 20%, or 25% to about 60%, 50%, 45%, 40%, 35%, 30%, or 27% by weight of gelling agent (all calculated on a dry weight basis). For example, the amorphous solid may comprise 1-50%, 5-40%, 10-30%, or 15-27% by weight of gelling agent.

[0036] In some embodiments, the gelling agent comprises a hydrocolloid. In some embodiments, the gelling agent comprises one or more compounds selected from the group including alginate, pectin, starch (and derivatives), cellulose (and derivatives), gums, silica or silicone compounds, clays, polyvinyl alcohol, and combinations thereof. For example, in some embodiments, the gelling agent comprises one or more of alginate, pectin, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, pullulan, xanthan gum, guar gum, carrageenan, agarose, acacia gum, fumed silica, PDMS, sodium silicate, kaolin, and polyvinyl alcohol. In some examples, the gelling agent comprises alginate and / or pectin, which may be combined with a hardening agent (such as a calcium source) during the formation of the amorphous solid. In some examples, the amorphous solid may comprise calcium cross-linked alginate and / or calcium cross-linked pectin.

[0037] In some embodiments, the gelling agent comprises alginate, which is present in the amorphous solid in an amount of 10-30% by weight of the amorphous solid (calculated on a dry weight basis). In some embodiments, alginate is the only gelling agent present in the amorphous solid. In other embodiments, the gelling agent comprises alginate and at least one additional gelling agent, such as pectin.

[0038] In some embodiments, the amorphous solid may include a gelling agent comprising carrageenan.

[0039] Suitably, the amorphous solid may comprise from about 5%, 10%, 15%, or 20% to about 80%, 70%, 60%, 55%, 50%, 45%, 40%, or 35% by weight of the aerosol generating agent (all calculated on a dry weight basis). The aerosol generating agent may act as a plasticizer. For example, the amorphous solid may comprise 5-80%, 10-60%, 15-50%, or 20-40% by weight of the aerosol generating agent. In some examples, the aerosol generating agent comprises one or more compounds selected from erythritol, propylene glycol, glycerol, triacetin, sorbitol, and xylitol. In some examples, the aerosol generating agent comprises, consists essentially of, or consists of glycerol. The inventors have found that if the plasticizer content is too high, the amorphous solid may absorb water, resulting in a material that does not produce a suitable consumption experience when used. The inventors have found that if the plasticizer content is too low, the amorphous solid may become brittle and easily break. The plasticizer content specified herein provides the amorphous solid flexibility that allows the amorphous solid sheet to be wound onto a bobbin, which is useful for the manufacture of aerosol products.

[0040] In some examples, the amorphous solid may comprise a flavoring. Suitably, the amorphous solid may comprise up to about 60%, 50%, 40%, 30%, 20%, 10%, or 5% by weight of flavoring. In some examples, the amorphous solid may comprise at least about 0.5%, 1%, 2%, 5%, 10%, 20%, or 30% by weight of flavoring (all calculated on a dry weight basis). For example, the amorphous solid may comprise 0.1-60%, 1-60%, 5-60%, 10-60%, 20-50%, or 30-40% by weight of flavoring. In some examples, the flavoring (if present) comprises, consists essentially of, or consists of menthol. In some examples, the amorphous solid is free of flavoring.

[0041] In some examples, the amorphous solid further comprises an active substance. For example, in some examples, the amorphous solid further comprises tobacco material and / or nicotine. For example, the amorphous solid may further comprise powdered tobacco and / or nicotine and / or tobacco extract. In some examples, the amorphous solid may comprise from about 1%, 5%, 10%, 15%, 20%, or 25% to about 70%, 50%, 45%, or 40% by weight (calculated on a dry weight basis) of an active substance. In some examples, the amorphous solid may comprise from about 1%, 5%, 10%, 15%, 20%, or 25% to about 70%, 60%, 50%, 45%, or 40% by weight (calculated on a dry weight basis) of tobacco material and / or nicotine.

[0042] In some examples, the amorphous solid comprises an active agent such as tobacco extract. In some examples, the amorphous solid may comprise 5-60% by weight (calculated on a dry weight basis) of tobacco extract. In some examples, the amorphous solid may comprise from about 5%, 10%, 15%, 20%, or 25% by weight to about 55%, 50%, 45%, or 40% by weight (calculated on a dry weight basis) of tobacco extract. For example, the amorphous solid may comprise 5-60%, 10-55%, or 25-55% by weight of tobacco extract. The tobacco extract may contain nicotine in a concentration such that the amorphous solid comprises 1%, 1.5%, 2%, or 2.5% by weight to about 6%, 5%, 4.5%, or 4% by weight of nicotine (calculated on a dry weight basis). In some instances, no nicotine other than that obtained from the tobacco extract may be present in the amorphous solid.

[0043] In some embodiments, the amorphous solid does not comprise tobacco material, but does comprise nicotine. In some such examples, the amorphous solid may comprise from about 1%, 2%, 3%, or 4% to about 20%, 15%, 10%, or 5% nicotine by weight (calculated on a dry weight basis). For example, the amorphous solid may comprise 1-20% or 2-5% nicotine by weight.

[0044] In some instances, the total content of actives and fragrances may be at least about 0.1%, 1%, 5%, 10%, 20%, 25%, or 30% by weight, in some instances, the total content of actives and fragrances may be less than about 80%, 70%, 60%, 50%, or 40% by weight (all calculated on a dry weight basis).

[0045] In some examples, the total nicotine and flavoring content may be at least about 1%, 5%, 10%, 20%, 25%, or 30% by weight, while no tobacco extract, preferably no tobacco material, may be present. In some examples, the total nicotine and flavoring content may be less than about 80%, 70%, 60%, 50%, or 40% by weight (all calculated on a dry weight basis), while no tobacco extract, preferably no tobacco material, may be present.

[0046] The amorphous solid may in some instances be a hydrogel and comprise less than about 20%, 15%, 12%, or 10% water by weight, calculated on a wet weight basis (WWB). In some instances, the amorphous solid may comprise at least about 1%, 2%, or 5% water by weight (WWB). In some instances, the amorphous solid may comprise from about 1% to about 15% water, or from about 5% to about 15% water, calculated on a wet weight basis. Preferably, the water content of the amorphous solid may be from about 5%, 7%, or 9% to about 15%, 13%, or 11% by weight (WWB), and most preferably about 10% by weight.

[0047] The amorphous solid may be made of a gel, and the gel may further comprise a solvent contained in an amount of 0.1 to 50% by weight. However, the present inventors have found that the inclusion of a solvent in which the fragrance can dissolve reduces gel stability, and the fragrance may leave the gel and crystallize. Therefore, in some examples, the gel does not include a solvent in which the fragrance can dissolve.

[0048] In some embodiments, the amorphous solid comprises less than 60% by weight of filler, for example, between 1% and 60% by weight, or between 5% and 50% by weight, or between 5% and 30% by weight, or between 10% and 20% by weight of filler.

[0049] In other embodiments, the amorphous solid comprises less than 20% by weight of filler, preferably less than 10% by weight or less than 5% by weight. In some instances, the amorphous solid comprises less than 1% by weight of filler, and in some instances, no filler.

[0050] When present, the filler may comprise one or more inorganic filler materials, such as calcium carbonate, perlite, vermiculite, diatomaceous earth, colloidal silica, magnesium oxide, magnesium sulfate, magnesium carbonate, and suitable inorganic adsorbents, such as molecular sieves. The filler may comprise one or more organic filler materials, such as wood pulp, cellulose, and cellulose derivatives. In some instances, the amorphous solid comprises less than 1% by weight of a filler, and in some instances, no filler. In particular, in some instances, the amorphous solid comprises no calcium carbonate, such as chalk.

[0051] In certain embodiments that include a filler, the filler is fibrous. For example, the filler may be a fibrous organic filler material, such as wood pulp, hemp fiber, cellulose, or a cellulose derivative. Without wishing to be bound by theory, it is believed that including a fibrous filler in an amorphous solid may increase the tensile strength of the material. This may be particularly advantageous in instances where the amorphous solid is provided as a sheet, for example, when the amorphous solid sheet surrounds a rod of aerosolizable material.

[0052] In some embodiments, the amorphous solid does not comprise tobacco fiber. In certain embodiments, the amorphous solid does not comprise fibrous material.

[0053] In some embodiments, the aerosol-forming material does not comprise tobacco fibers, hi certain embodiments, the aerosol-forming material does not comprise fibrous materials.

[0054] In some embodiments, the aerosol-generating substrate does not comprise tobacco fibers, hi certain embodiments, the aerosol-generating substrate does not comprise fibrous material.

[0055] In some embodiments, the aerosol product does not comprise tobacco fiber, hi certain embodiments, the aerosol product does not comprise fibrous material.

[0056] In some instances, the amorphous solid may consist essentially of or consist of a gelling agent, an aerosol generating agent, an active agent (e.g., a tobacco material and / or a nicotine source), water, and optionally a flavoring.

[0057] The aerosol-forming substrate may have any suitable areal density, for example 30 g / m 2 ~120g / m 2 In some embodiments, the aerosol-forming material may have a density of about 30 to 70 g / m 2 , or about 40 to 60 g / m 2 In some embodiments, the amorphous solid may have an areal density of about 80-120 g / m 2 , or about 70 to 110 g / m 2 , or in particular about 90 to 110 g / m 2 Such areal densities may be particularly suitable when the aerosol-forming material is included in the aerosol product article / assembly in sheet form or as chopped sheets (discussed further below).

[0058] In some examples, the amorphous solid in sheet form may have a tensile strength of about 200N / m to about 900N / m. In some examples, such as examples where the amorphous solid does not include a filler, the amorphous solid may have a tensile strength of 200N / m to 400N / m, or 200N / m to 300N / m, or about 250N / m. Such tensile strengths may be particularly suitable for embodiments where the aerosol-forming substrate is a shredded sheet that is incorporated into an aerosol product article. In some examples, such as examples where the amorphous solid includes a filler, the amorphous solid may have a tensile strength of 600N / m to 900N / m, or 700N / m to 900N / m, or about 800N / m. Such tensile strengths may be particularly suitable for embodiments where the aerosol-forming substrate is included in an aerosol product article / assembly as a rolled sheet, preferably in the form of a tube.

[0059] The slurry composition may contain the above components in the relevant proportions along with a solvent, typically water, in which case the weight percent composition values ​​given above for the amorphous solids also apply to the slurry since all values ​​are given on a dry weight basis.

[0060] In some instances, the solvent may be present in an amount of about 70% to 90% by weight (WWB).

[0061] In some instances, a heating means, such as a resistive or inductive heating element, may be embedded in the amorphous solid.

[0062] Aerosol-forming substrates and articles and assemblies incorporating same As noted above, the present invention also provides an aerosol-forming substrate comprising an aerosol-forming layer attached to a carrier layer, where the aerosol-forming layer comprises an amorphous solid and the carrier is a layer of tobacco material.

[0063] In some instances, the carrier layer comprises a sheet of tobacco material. In some instances, the carrier layer comprises reconstituted tobacco.

[0064] The present invention also provides an aerosol-generating assembly comprising an aerosol-forming substrate as described herein and a heater configured to heat, but not combust, the substrate.

[0065] In some examples, the heater, in use, may heat the aerosolizable material to between 120° C. and 350° C. without burning the aerosolizable material. In some examples, the heater, in use, may heat the aerosolizable material to between 140° C. and 250° C. without burning the aerosolizable material. In some examples, in use, substantially the entirety of the amorphous solid is less than about 4 mm, 3 mm, 2 mm, or 1 mm from the heater. In some examples, the solid is located between about 0.010 mm and 2.0 mm, preferably between about 0.02 mm and 1.0 mm, preferably between about 0.1 mm and 0.5 mm from the heater. These minimum distances may reflect the thickness of the carrier supporting the amorphous solid in some examples. In some examples, the surface of the amorphous solid may directly abut the heater.

[0066] The present invention also provides an aerosol product article for use in an aerosol generating assembly, the article comprising an aerosol-forming substrate as described herein.

[0067] In some examples, the aerosol-forming substrate is placed in the article or assembly as a rod in the form of a chopped sheet. In some other examples, the aerosol-forming substrate may be included in sheet form. For example, the aerosol-forming substrate may be included as a flat sheet, as a pleated or gathered sheet, as a corrugated sheet, or as a rolled sheet (i.e., in the form of a tube). In some such examples, the amorphous solid of these embodiments may be included in the aerosol product article / assembly as a sheet, for example, as a sheet surrounding a rod of aerosolizable material (such as tobacco). In yet another example, the aerosol-forming substrate described herein may be incorporated in both sheet and chopped form. In some examples, the aerosol-forming substrate has a density of about 80-120 g / m (so that the aerosol-forming substrate has a density similar to that of cut rag tobacco so that a mixture of these two substances does not easily separate).2 , preferably about 100 g / m 2 It may have a mass per unit area of

[0068] The heater is configured to heat but not combust the aerosol-forming substrate. The heater may in some examples be a thin-film electrical resistance heater. In other examples, the heater may comprise an inductive heater or other heater. The heater may be a combustible heat source or a chemical heat source that undergoes an exothermic reaction to generate heat when in use. The aerosol generating assembly may comprise multiple heaters. The heaters may be powered by a battery.

[0069] The aerosol generating assembly or article may further comprise a cooling element and / or a filter. If a cooling element is present, the cooling element may act or function to cool the gaseous or aerosol components. In some instances, the cooling element may act to cool the gaseous components so that they condense to form an aerosol. The cooling element may also act to move hot parts of the device away from the user. If a filter is present, the filter may comprise any suitable filter known in the art, such as a cellulose acetate plug.

[0070] In some examples, the aerosol generating assembly may be a heat-not-burn device. That is, the aerosol generating assembly may include a solid tobacco-containing material (and no liquid aerosolizable material). In some examples, the amorphous solid may comprise a tobacco material. A heat-not-burn device is disclosed in WO2015 / 062983A2, the entirety of which is incorporated herein by reference.

[0071] In some examples, the aerosol generating assembly may be an e-cigarette hybrid device. That is, the aerosol generating assembly may include a solid aerosolizable material and a liquid aerosolizable material. In some examples, the amorphous solid may comprise nicotine. In some examples, the amorphous solid may comprise tobacco material. In some examples, the amorphous solid may comprise tobacco material and a separate nicotine source. These separate aerosolizable materials may be heated by separate heaters or may be heated by the same heater, and in some examples, the downstream aerosolizable material may be heated by a hot aerosol generated from the upstream aerosolizable material. An e-cigarette hybrid device is disclosed in WO2016 / 135331A1, the entirety of which is incorporated herein by reference.

[0072] The aerosol generating assembly or article may further comprise vent holes. In some instances, the vent holes may be provided in the filter and / or cooling element. These holes allow cool air to be drawn into the article during use, where it can mix with the heated volatile components, thereby cooling the aerosol.

[0073] The ventilation facilitates the production of visible heated volatiles from the article when the article is heated in use. The heated volatiles are made visible by a process of cooling the heated volatiles such that supersaturation of the heated volatiles occurs. The heated volatiles then undergo droplet formation (also known as nucleation) and ultimately the size of the aerosol particles of the heated volatiles increases due to further condensation of the heated volatiles and by coalescence of newly formed droplets from the heated volatiles.

[0074] In some instances, the ratio of cold air to the sum of heated volatiles and cold air (known as the ventilation ratio) is at least 15%. A ventilation ratio of 15% allows the heated volatiles to be visualized by the methods described above. The visibility of the heated volatiles allows the user to discern that volatiles are being produced, enhancing the sensory experience of the smoking experience.

[0075] In another example, the ventilation ratio is between 50% and 85% to further cool the heated volatile components. In some examples, the ventilation ratio may be at least 60% or 65%.

[0076] 1 and 2, there is shown a partially cut-away cross-sectional view and a perspective view of an example of an aerosol production article 101. The article 101 is adapted for use with a device having a power source and a heater. The article 101 of this embodiment is particularly suited for use with the device 51 shown in Figures 5-7, described below. In use, the article 101 can be removably inserted into the device at the insertion point 20 of the device 51 shown in Figure 5.

[0077] The article 101 in one example is in the form of a generally cylindrical rod including a body of aerosol-generating material 103 and a filter assembly 105 in the form of a rod. The aerosol-generating material comprises an aerosol-forming substrate as described herein. In the illustrated embodiment, the aerosol-forming substrate is provided as a rod in the form of chopped sheets. In some other embodiments (not shown), the aerosol-forming substrate may be included in sheet form. For example, the aerosol-forming substrate may be included as a flat sheet, as a pleated or gathered sheet, as a corrugated sheet, or as a rolled sheet (i.e., in the form of a tube). In some such examples, the amorphous solid of these embodiments may be included in the aerosol product article / assembly as a sheet, for example, as a sheet surrounding a rod of aerosolizable material (such as tobacco). In yet another example (also not shown), the aerosol-forming substrate as described herein may be incorporated in sheet form and chopped form.

[0078] The filter assembly 105 includes three segments: a cooling segment 107, a filter segment 109, and an oral end segment 111. The article 101 has a first end 113, also known as the oral or proximal end, and a second end 115, also known as the distal end. The body of aerosol-generating material 103 is disposed at the distal end 115 of the article 101. In one example, the cooling segment 107 is disposed adjacent to the body of aerosol-generating material 103 between the body of aerosol-generating material 103 and the filter segment 109 such that the cooling segment 107 is in an abutting relationship with the aerosol-generating material 103 and the filter segment 109. In another example, there may be a separation between the body of aerosol-generating material 103 and the cooling segment 107 and between the body of aerosol-generating material 103 and the filter segment 109. The filter segment 109 is disposed between the cooling segment 107 and the oral end segment 111. Oral end segment 111 is disposed toward proximal end 113 of article 101 and is adjacent filter segment 109. In one example, filter segment 109 is in an abutting relationship with oral end segment 111. In one embodiment, the overall length of filter assembly 105 is between 37 mm and 45 mm, and more preferably, the overall length of filter assembly 105 is 41 mm.

[0079] In one example, the rod of aerosol-generating material 103 has a length between 34 mm and 50 mm, preferably between 38 mm and 46 mm, and preferably has a length of 42 mm.

[0080] In one example, the overall length of the article 101 is between 71 mm and 95 mm, preferably between 79 mm and 87 mm, and preferably 83 mm.

[0081] One axial end of the body of aerosol-generating material 103 is visible at the distal end 115 of the article 101. However, in other embodiments, the distal end 115 of the article 101 may comprise an end member (not shown) that covers one axial end of the body of aerosol-generating material 103.

[0082] The body of aerosol-generating material 103 is joined to the filter assembly 105 by an annular tipping paper (not shown) that is disposed substantially around the filter assembly 105 so as to surround the filter assembly 105 and extends partially along the length of the body of aerosol-generating material 103. In one example, the tipping paper is made from 58 GSM standard tipping base paper. In one example, the tipping paper has a length of 42 mm to 50 mm, preferably 46 mm.

[0083] In one example, the cooling segment 107 is an annular tube that is disposed around and defines a cavity within the cooling segment that provides a chamber through which heated volatile components generated from the body of aerosol-generating material 103 flow. The cooling segment 107 is hollow to provide a chamber for aerosol accumulation, yet rigid enough to withstand axial compressive forces and bending moments that may occur during manufacture and use of the article 101 during insertion into the device 51. In one example, the wall thickness of the cooling segment 107 is about 0.29 mm.

[0084] The cooling segment 107 provides a physical displacement between the aerosol-generating material 103 and the filter segment 109. The physical displacement provided by the cooling segment 107 provides a thermal gradient across the length of the cooling segment 107. In one example, the cooling segment 107 is configured to provide a temperature difference of at least 40 degrees Celsius between the heated volatile component entering the first end of the cooling segment 107 and the heated volatile component exiting the second end of the cooling segment 107. In one example, the cooling segment 107 is configured to provide a temperature difference of at least 60 degrees Celsius between the heated volatile component entering the first end of the cooling segment 107 and the heated volatile component exiting the second end of the cooling segment 107. This temperature difference across the length of the cooling element 107 protects the temperature sensitive filter segment 109 from the high temperatures of the aerosol-generating material 103 when the aerosol-generating material 103 is heated by the device 51. If no physical displacement is provided between the filter segment 109 and the aerosol generating material body 103 and the heating element of the device 51, the temperature-sensitive filter segment 109 may become damaged during use and no longer effectively perform its required function.

[0085] In one example, the length of the cooling segment 107 is at least 15 mm. In one example, the length of the cooling segment 107 is between 20 mm and 30 mm, more specifically between 23 mm and 27 mm, more specifically between 25 mm and 27 mm, and preferably 25 mm.

[0086] The cooling segment 107 is made from paper, meaning that it is constructed from a material that does not generate compounds of concern (e.g., toxic compounds) when adjacent to the heater of the device 51 in use. In one example, the cooling segment 107 is manufactured from a spirally wound paper tube that provides a hollow interior chamber but maintains mechanical rigidity. The spirally wound paper tube can meet the stringent dimensional accuracy requirements of high speed manufacturing processes for tube length, outer diameter, roundness and straightness.

[0087] In another example, cooling segment 107 is a recess made from stiff plug wrap or tipping paper that is manufactured to be sufficiently stiff to withstand axial compressive forces and bending moments that may occur during manufacture and use of article 101 during insertion into device 51.

[0088] The filter segment 109 may be formed from any filter material sufficient to remove one or more volatile compounds from the heated volatiles from the aerosol generating material. In one example, the filter segment 109 is made from a monoacetate material, such as cellulose acetate. The filter segment 109 provides cooling and reduced irritation of the heated volatiles without depleting the amount of the heated volatiles to an unsatisfactory level for the user.

[0089] In some embodiments, a capsule (not shown) may be provided within the filter segment 109. The capsule may be substantially centered within the filter segment 109, both radially and longitudinally. In other examples, the capsule may be off-center in one or more dimensions. In some examples, the capsule, if present, may contain a volatile component, such as a flavoring or an aerosol generating agent.

[0090] The density of the cellulose acetate tow material of the filter segment 109 controls the pressure drop across the filter segment 109, which in turn controls the resistance to draw of the article 101. Thus, the selection of material for the filter segment 109 is important in controlling the resistance to draw of the article 101. Additionally, the filter segment performs a filtration function in the article 101.

[0091] In one example, the filter segment 109 is made of 8Y15 grade filter tow material, which provides a filtering effect on the heated volatilized material while reducing the size of the condensed aerosol droplets resulting from the heated volatilized material.

[0092] The presence of filter segment 109 provides an insulating effect by further cooling the heated volatile components exiting cooling segment 107. This additional cooling effect reduces the temperature of the contact of the user's lips with the surface of filter segment 109.

[0093] In one example, the filter segment 109 is between 6 mm and 10 mm in length, preferably 8 mm.

[0094] The mouth end segment 111 is an annular tube that is disposed around and defines a cavity within the mouth end segment 111. The cavity provides a chamber for heated volatile components flowing from the filter segment 109. The mouth end segment 111 is hollow to provide a chamber for aerosol accumulation, but is rigid enough to withstand axial compressive forces and bending moments that may occur during use of the article during manufacture and insertion into the device 51. In one example, the wall thickness of the mouth end segment 111 is about 0.29 mm. In one example, the length of the mouth end segment 111 is between 6 mm and 10 mm, preferably 8 mm.

[0095] The mouth end segment 111 may be manufactured from a spiral wound paper tube that provides a hollow interior chamber but maintains significant mechanical rigidity. A spiral wound paper tube can meet the stringent dimensional accuracy requirements of high speed manufacturing processes for tube length, outside diameter, roundness and straightness.

[0096] The mouth end segment 111 serves the function of preventing liquid condensate that accumulates at the outlet of the filter segment 109 from coming into direct contact with the user.

[0097] It should be appreciated that in one example, the oral end segment 111 and the cooling segment 107 may be formed from a single tube, with the filter segment 109 disposed within the tube to separate the oral end segment 111 and the cooling segment 107.

[0098] 3 and 4, there are shown a partial cutaway cross-sectional view and a perspective view of an example of an article 301. The reference numbers shown in Figures 3 and 4 correspond to the reference numbers shown in Figures 1 and 2, but are increased by 200.

[0099] In the example of article 301 shown in Figures 3 and 4, a ventilation region 317 is provided in article 301 to allow air to flow from the exterior of article 301 to the interior of article 301. In one example, ventilation region 317 takes the form of one or more vent holes 317 formed through an outer layer of article 301. The vent holes may be located in cooling segment 307 to aid in cooling article 301. In one example, ventilation region 317 comprises one or more rows of holes, preferably each row of holes located along the periphery of article 301 in a cross section substantially perpendicular to the longitudinal axis of article 301.

[0100] In one example, there are 1-4 rows of vent holes to provide ventilation to the article 301. Each row of vent holes may have 12-36 vent holes 317. The diameter of the vent holes 317 may be, for example, 100-500 μm. In one example, the axial spacing between the rows of vent holes 317 is 0.25 mm-0.75 mm, preferably 0.5 mm.

[0101] In one example, the vent holes 317 have a uniform size. In another example, the vent holes 317 have a variety of sizes. The vent holes can be created using any suitable technique, such as one or more of laser techniques, mechanical drilling of the cooling segment 307, or pre-drilling of the cooling segment 307 before it is formed in the article 301. The vent holes 317 are positioned to effectively cool the article 301.

[0102] In one example, the row of vent holes 317 is located at least 11 mm from the proximal end 313 of the article, and preferably 17 mm to 20 mm from the proximal end 313 of the article 301. The location of the vent holes 317 is such that the vent holes 317 are not blocked by a user when the article 301 is in use.

[0103] By providing a row of vent holes 17-20 mm from the proximal end 313 of the article 301, the vent holes 317 can be located on the outside of the device 51 when the article 301 is fully inserted into the device 51, as seen in Figures 6 and 7. By locating the vent holes on the outside of the device, unheated air can enter the article 301 from outside the device 51 through the vent holes to help cool the article 301.

[0104] The length of cooling segment 307 is such that when item 301 is fully inserted into device 51 , cooling segment 307 is partially inserted into device 51 . This length of the cooling segment 307 serves two functions: first, to provide a physical gap between the heating device 51 and the heat sensitive filter device 309; and second, to allow the vent 317 to be located within the cooling segment when the item 301 is fully inserted into the device 51, while also being located outside the device 51. As can be seen in Figures 6 and 7, the majority of the cooling element 307 is located within the device 51. However, there is a portion of the cooling element 307 that extends outside the device 51. It is in this portion of the cooling element 307 that extends outside the device 51 that the vent 317 is located.

[0105] 5-7 in more detail, an example of a device 51 is shown that is configured to heat an aerosol-forming material to volatilize at least one component of said aerosol-forming material, typically to form an inhalable aerosol. Device 51 is a heating device that releases compounds by heating, but not combusting, the aerosol-forming material.

[0106] The first end 53 may be referred to herein as the oral or proximal end 53 of the device 51, and the second end 55 may be referred to herein as the distal end 55 of the device 51. The device 51 has an on / off button 57, allowing the entire device 51 to be activated / deactivated as desired by the user.

[0107] The device 51 includes a housing 59 for arranging and protecting various internal components of the device 51. In the illustrated example, the housing 59 includes a unitary sleeve 11 that surrounds the outer periphery of the device 51 and is capped with a top panel 17 that generally forms the "top" of the device 51 and a bottom panel 19 that generally forms the "bottom" of the device 51. In another example, the housing includes, in addition to the top panel 17 and bottom panel 19, a front panel, a rear panel, and a pair of opposing side panels.

[0108] Top panel 17 and / or bottom panel 19 may be removably secured to unitary sleeve 11 to allow easy access to the interior of device 51, or may be "permanently" secured to unitary sleeve 11, for example to prevent a user from accessing the interior of device 51. In one example, panels 17 and 19 are made of a plastic material (including glass-filled nylon formed by injection molding, etc.) and unitary sleeve 11 is made of aluminum, although other materials and other manufacturing processes may be used.

[0109] The top panel 17 of the device 51 has an opening 20 at the mouth end 53 of the device 51 through which a user can insert and remove an article 101, 301 containing an aerosol-generating material into and from the device 51 during use.

[0110] Housing 59 has disposed therein or secured thereto heating device 23, control circuitry 25, and power source 27. In this example, heating device 23, control circuitry 25, and power source 27 are laterally adjacent (i.e., adjacent when viewed from one end), with control circuitry 25 generally located between heating device 23 and power source 27, although other arrangements are possible.

[0111] The control circuitry 25 may include a controller, such as a microprocessor device, constructed and arranged to control the heating of the aerosol-generating material within the article 101, 301, as discussed further below.

[0112] Power source 27 may be, for example, a battery, which may be a rechargeable or non-rechargeable battery. Examples of suitable batteries include, for example, lithium ion batteries, nickel batteries (e.g., nickel cadmium batteries), alkaline batteries, etc. Battery 27 is electrically coupled to heating device 23 and provides power under the control of control circuitry 25 when needed to heat the aerosol-forming material within the article (to volatilize the aerosol-forming material without burning it, as discussed above).

[0113] An advantage of locating the power source 27 laterally adjacent to the heating apparatus 23 is that a physically larger power source 25 can be used without making the overall device 51 excessively long. Of course, a physically larger power source 25 generally has a higher capacity (i.e., the total electrical energy it can deliver, often measured in ampere-hours or the like) and therefore may provide a longer battery life for the device 51.

[0114] In one example, the heating device 23 is generally in the form of a hollow cylindrical tube having a hollow internal heating chamber 29 into which the article 101, 301 comprising the aerosol-generating material is inserted for heating during use. Various configurations of the heating device 23 are possible. For example, the heating device 23 may comprise a single heating element or may be formed from multiple heating elements aligned along the longitudinal axis of the heating device 23. The or each heating element may be annular or tubular, or may be at least partially annular or at least partially tubular along its circumference. In one example, the or each heating element may be a thin film heater. In another example, the or each heating element may be made from a ceramic material. Examples of suitable ceramic materials include alumina and aluminum nitride ceramics, as well as silicon nitride ceramics, which may be layered and sintered. Other heating configurations are possible, including, for example, induction heating, infrared heating elements (which heat by radiating infrared radiation), resistive heating elements formed by resistive electrical windings, and the like.

[0115] In one particular example, the heating device 23 is supported by a stainless steel support tube and includes a polyimide heating element. The heating device 23 is dimensioned such that when the article 101, 301 is inserted into the device 51, substantially the entire body of the aerosol-generating material 103, 303 of the article 101, 301 is inserted into the heating device 23.

[0116] The, or each, heating element may be arranged so as to heat selected zones (areas) of the aerosol-forming material independently, for example sequentially (over time as described above) or together (simultaneously) as desired.

[0117] The heating device 23 in this example is surrounded by insulation 31 along at least a portion of its length. The insulation 31 helps to reduce heat passing from the heating device 23 to the exterior of the device 51. This generally reduces heat loss and therefore helps to keep the power requirements of the heating device 23 low. The insulation 31 also helps to keep the exterior of the device 51 cool during operation of the heating device 23. In one example, the insulation 31 may be a double-walled sleeve that provides a low pressure area between the two walls of the sleeve. That is, the insulation 31 may be, for example, a "vacuum" tube, i.e., a tube that is at least partially evacuated to minimize heat transfer by conduction and / or convection. Other configurations for the insulation 31 are possible, including the use of an insulating material (including, for example, a suitable foam-type material) in addition to or in place of the double-walled sleeve.

[0118] The housing 59 may further include various internal support structures 37 for supporting all of the internal components as well as the heating device 23 .

[0119] The device 51 further comprises a collar 33 extending around the opening 20 and projecting from the opening 20 into the interior of the housing 59, and a generally tubular chamber 35 disposed between the collar 33 and one end of the vacuum sleeve 31. The chamber 35 further comprises a cooling structure 35f, which in this example comprises a plurality of cooling fins 35f spaced along an outer surface of the chamber 35, each fin being disposed to circumscribe the outer surface of the chamber 35. When the article 101, 301 is inserted into the device 51 over at least a portion of the length of the hollow chamber 35, a gap 36 exists between the hollow chamber 35 and the article 101, 301. The gap 36 circumscribes the entire circumference of the article 101, 301 over at least a portion of the cooling segment 307.

[0120] The collar 33 includes a number of ridges 60 arranged around the periphery of the opening 20, which protrude into the opening 20. The ridges 60 occupy space within the opening 20 such that the opening distance of the opening 20 at the location of the ridges 60 is less than the opening distance of the opening 20 without the ridges 60. The ridges 60 are configured to engage an article 101, 301 inserted within the device to help secure it within the device 51. The open spaces (not shown) defined by adjacent pairs of the ridges 60 and the article 101, 301 form ventilation paths around the outer surface of the article 101, 301. These ventilation paths allow hot steam escaping from the article 101, 301 to exit the device 51, and allow cooling air to flow within the gap 36 around the article 101, 301 into the device 51.

[0121] In operation, the article 101, 301 is removably inserted into the insertion site 20 of the device 51, as shown in Figures 5-7. Referring specifically to Figure 6, in one example, the body of aerosol-generating material 103, 303 (which is disposed at the distal end 115, 315 of the article 101, 301) is completely contained within the heating arrangement 23 of the device 51. The proximal end 113, 313 of the article 101, 301 extends from the device 51 and functions as a mouthpiece assembly for the user.

[0122] During operation, the heating device 23 heats the article 101 , 301 to volatilize at least one component of the aerosol-forming material from the body 103 , 303 of aerosol-forming material.

[0123] The primary flow path for heated volatiles from the body of aerosol-generating material 103, 303 is axially through the article 101, 301, through the inner chamber of the cooling segment 107, 307, through the filter segment 109, 309, and through the mouth end segment 111, 313 to the user. In one example, the temperature of heated volatiles generated from the body of aerosol-generating material is between 60° C. and 250° C., which may be above an acceptable inhalation temperature for a user. The heated volatiles cool as they travel through the cooling segment 107, 307, and some of the volatiles condense on the inner surface of the cooling segment 107, 307.

[0124] In the example of article 301 shown in Figures 3 and 4, cool air can enter cooling segment 307 through vents 317 formed in cooling segment 307. This cool air mixes with the heated volatile components to further cool the heated volatile components.

[0125] Example Embodiments In some embodiments, the amorphous solid comprises menthol.

[0126] Certain embodiments comprising menthol-containing amorphous solids may be particularly suitable for inclusion as shredded sheets in an aerosol product / assembly. In these embodiments, the amorphous solids may have the following composition (DWB): gelling agent (preferably comprising alginate, more preferably comprising a combination of alginate and pectin) in an amount of about 20% to about 40%, or about 25% to 35% by weight (DWB), menthol in an amount of about 35% to about 60%, or about 40% to 55% by weight, and aerosol generating agent (preferably comprising glycerol) in an amount of about 10% to about 30%, or about 15% to about 25% by weight.

[0127] In one embodiment, the amorphous solid comprises (by weight DWB) about 32-33% alginate / pectin gelling agent blend, about 47-48% menthol flavoring, and about 19-20% glycerol aerosol generating agent.

[0128] The amorphous solids of these embodiments may have any suitable water content, for example, the amorphous solids may have a water content of about 2% to about 10% by weight, or about 5% to about 8% by weight, or about 6% by weight.

[0129] As discussed above, the amorphous solids of these embodiments may be included in the aerosol product article / assembly as a shredded sheet. The shredded sheet may be blended with the tobacco and provided in the article / assembly. Alternatively, the amorphous solids may be provided as a non-shredded sheet. Suitably, the shredded or non-shredded sheet has a thickness of about 0.015 mm to about 1 mm, preferably about 0.02 mm to about 0.07 mm.

[0130] Certain embodiments of the menthol-containing amorphous solids may be particularly suitable for inclusion in an aerosol product / assembly as a sheet, for example a sheet surrounding a rod of aerosolizable material (such as tobacco). In these embodiments, the amorphous solids may have the following composition (DWB): gelling agent (preferably comprising alginate, more preferably comprising a combination of alginate and pectin) in an amount of about 5% to about 40% by weight (DWB), or about 10% to 30% by weight, menthol in an amount of about 10% to about 50% by weight, or about 15% to 40% by weight, aerosol generating agent (preferably comprising glycerol) in an amount of about 5% to about 40% by weight, or about 10% to about 35% by weight, and optionally a filler in an amount up to 60% by weight (e.g., in an amount of 5% to 20% by weight, or 40% to 60% by weight).

[0131] In one of these embodiments, the amorphous solids comprise (by weight) about 11% alginate / pectin gelling agent blend, about 56% wood pulp filler, about 18% menthol flavoring, and about 15% glycerol.

[0132] In another of these embodiments, the amorphous solids comprise (by weight) about 22% alginate / pectin gelling agent blend, about 12% wood pulp filler, about 36% menthol flavoring, and about 30% glycerol.

[0133] As noted above, the amorphous solid of these embodiments may be included as a sheet. In one embodiment, the sheet is disposed on a carrier comprising paper. In one embodiment, the sheet is disposed on a carrier comprising a metal foil, preferably an aluminum metal foil. In this embodiment, the amorphous solid may abut against the metal foil.

[0134] In one embodiment, the sheet forms part of a laminate material with layers (preferably comprising paper) attached to the top and bottom surfaces of the sheet. Suitably, the sheet of amorphous solid has a thickness of from about 0.015 mm to about 1 mm.

[0135] In some embodiments, the amorphous solid comprises a flavoring that does not comprise menthol. In these embodiments, the amorphous solid may have the following composition (DWB): gelling agent (preferably comprising alginate) in an amount of about 5 to about 40%, or about 10 to about 35%, or about 20 to about 35% by weight (DWB); flavoring agent in an amount of about 0.1 to about 40%, about 1 to about 30%, about 1 to about 20%, or about 5 to about 20% by weight; aerosol generating agent (preferably comprising glycerol) in an amount of 15 to 75%, about 30 to about 70%, or about 50 to about 65% by weight; and optionally a filler (suitably wood pulp) in an amount of about 60%, about 20%, about 10%, or less than about 5% by weight (preferably the amorphous solid is no filler).

[0136] In one of these embodiments, the amorphous solid comprises (by weight DWB) about 27% alginate gelling agent, about 14% flavoring, and about 57% glycerol aerosol generating agent.

[0137] In another of these embodiments, the amorphous solid comprises (by weight in DWB) about 29% alginate gelling agent, about 9% flavoring, and about 60% glycerol.

[0138] The amorphous solids of these embodiments may be included in the aerosol product / assembly as shredded sheets, optionally blended with cut tobacco. Alternatively, the amorphous solids of these embodiments may be included in the aerosol product / assembly as a sheet, such as a sheet surrounding a rod of aerosolizable material (such as tobacco). Alternatively, the amorphous solids of these embodiments may be included in the aerosol product / assembly as a layer portion disposed on a carrier.

[0139] In some embodiments, the amorphous solid comprises tobacco extract. In these embodiments, the amorphous solid may have the following composition (DWB): gelling agent (preferably comprising alginate) in an amount of about 5% to about 40%, about 10% to 30%, or about 15% to about 25% by weight (DWB), tobacco extract in an amount of about 30% to about 60%, about 40% to 55%, or about 45% to about 50% by weight, and aerosol generating agent (preferably comprising glycerol) in an amount of about 10% to about 50%, about 20% to about 40%, or about 25% to about 35% by weight.

[0140] In one embodiment, the amorphous solid comprises (by weight in DWB) about 20% alginate gelling agent, about 48% Virginia tobacco extract, and about 32% glycerol.

[0141] The amorphous solids of these embodiments may have any suitable water content, for example, the amorphous solids may have a water content of about 5% to about 15% by weight, or about 7% to about 13% by weight, or about 10% by weight.

[0142] The amorphous solids of these embodiments may be included in the aerosol product / assembly as a shredded sheet, optionally blended with cut tobacco. Alternatively, the amorphous solids of these embodiments may be included in the aerosol product / assembly as a sheet, such as a sheet surrounding a rod of aerosolizable material (such as tobacco). Alternatively, the amorphous solids of these embodiments may be included in the aerosol product / assembly as a layer portion disposed on a carrier. Preferably, in any of these embodiments, the amorphous solid has a thickness of about 50 μm to about 200 μm, or about 50 μm to about 100 μm, or about 60 μm to about 90 μm, preferably about 77 μm.

[0143] The slurry for forming the amorphous solid may also form part of the present invention. In some examples, the slurry may have an elastic modulus (also called storage modulus) of about 5 to 1200 Pa, and in some examples, the slurry may have a viscous modulus (also called loss modulus) of about 5 to 600 Pa.

[0144] definition As used herein, an active agent is a bioactive material, i.e., a material for achieving or enhancing a physiological response. The active agent may be selected from, for example, functional foods, nootropics, and psychoactive substances. The active agent may be naturally occurring or synthetically obtained. The active agent may comprise, for example, nicotine, caffeine, taurine, theine, vitamins (such as B6, B12, C), melatonin, cannabinoids, or components, derivatives, or combinations thereof. The active agent may comprise one or more components, derivatives, or extracts of tobacco, cannabis, or other botanical materials.

[0145] In some embodiments, the active agent comprises nicotine.

[0146] In some embodiments, the active agent comprises caffeine, melatonin, or vitamin B12.

[0147] As described herein, the active substance may comprise one or more components, derivatives or extracts of cannabis, such as one or more cannabinoids or terpenes.

[0148] Cannabinoids are a class of natural or synthetic compounds that act on cannabinoid receptors (i.e., CB1 and CB2) in cells that inhibit neurotransmitter release in the brain. Cannabinoids can be found naturally in plants such as cannabis (phytocannabinoids), from animals (endocannabinoids), or artificially produced (synthetic cannabinoids). Cannabis species exhibit at least 85 different phytocannabinoids, divided into several subclasses. These subclasses include cannabigerol, cannabichromene, cannabidiol, tetrahydrocannabinol, cannabinol and cannabinodiol, and other cannabinoids. Cannabinoids found in cannabis include, but are not limited to, cannabigerol (CBG), cannabichromene (CBC), cannabidiol (CBD), tetrahydrocannabinol (THC), cannabinol (CBN), cannabinodiol (CBDL), cannabicyclol (CBL), cannabivarin (CBV), tetrahydrocannabivarin (THCV), cannabidivarin (CBDV), cannabichromevarin (CBCV), cannabigerovarin (CBGV), cannabigerol monomethyl ether (CBGM), cannabinerolic acid, cannabidiolic acid (CBDA), cannabinol propyl variant (CBNV), cannabiditriol (CBO), tetrahydrocannabinolic acid (THCA), and tetrahydrocannabivarinic acid (THCV A).

[0149] As described herein, the active substance may comprise or be derived from one or more botanical materials or their components, derivatives, or extracts. As used herein, the term "botanical material" includes any material derived from a plant, including, but not limited to, extracts, leaves, bark, fibers, stems, roots, seeds, flowers, fruits, pollen, husks, skins, etc. Alternatively, the material may comprise an active compound that is naturally present in the botanical material or is obtained synthetically. The material may be in the form of a liquid, gas, solid, powder, dust, crushed particles, granules, pellets, fragments, strips, sheets, etc. Examples of botanical materials include tobacco, eucalyptus, star anise, hemp, cacao, cannabis, fennel, lemongrass, peppermint, spearmint, rooibos, chamomile, flax, ginger, ginkgo leaf extract, hazel, hibiscus, bay leaf, licorice, matcha, yerba mate, orange peel, papaya, rose, sage, tea (green tea, black tea, etc.), thyme, cloves, cinnamon, coffee, aniseed, basil, bay leaf, cardamom, coriander, cumin, nutmeg, oregano, paprika, rosemary, saffron, and lavender. , lemon peel, mint, juniper, elderflower, vanilla, wintergreen, shiso, turmeric, sandalwood, cilantro, bergamot, orange blossom, myrtle, blackcurrant, valerian, pimento, mace, damiane, marjoram, olive, lemon balm, lemon basil, chives, Calvi, verbena, tarragon, geranium, mulberry, ginseng, theanine, theacrine, maca, ashwagandha, damiana, guarana, chlorophyll, baobab, or any combination thereof.The mint may be selected from the following mint varieties: Mentha arvensis, Grapefruit mint (Mentha cv), Egyptian mint (Mentha niliaca), Peppermint (Mentha piperita), Lime mint (Mentha piperita citrata cv), Chocolate mint (Mentha piperita cv), Curly mint (Mentha spicata crispa), Wild mint (Mentha cordifolia), Horse mint (Mentha longifolia), Pineapple mint (Mentha suaveolens variegata), Pennyroyal mint (Mentha pulegium), English spearmint (Mentha spicata cv), and Apple mint (Mentha suaveolens).

[0150] In some embodiments, the botanical material is selected from eucalyptus, star anise, cocoa, and hemp.

[0151] In some embodiments, the plant material is selected from rooibos and fennel.

[0152] As used herein, the terms "flavoring agent" and "flavoring agent" refer to materials that can be used to create a desired taste, aroma, or other somatic sensation in products for adult consumers, where local regulations permit. They can be naturally occurring flavoring materials, botanical materials, extracts of botanical materials, synthetically derived materials, or combinations thereof (e.g., tobacco, cannabis, licorice, hydrangea, eugenol, magnolia leaf, chamomile, fenugreek, clove, maple, matcha, menthol, Japanese peppermint, aniseed (anise), cinnamon, turmeric, Indian spice, Asian spice, herb, wintergreen, cherry, berry, red berry, cranberry, peach, apple, orange, mango, etc.). , clementine, lemon, lime, tropical fruits, papaya, rhubarb, grapes, durian, dragon fruit, cucumber, blueberry, mulberry, citrus fruits, Drambuie, bourbon, scotch, whiskey, gin, tequila, rum, spearmint, peppermint, lavender, aloe vera, cardamom, celery, cascarilla, nutmeg, sandalwood, bergamot, geranium, khat, naswar, betel, sheesh Shisha, pine, honey essence, rose oil, vanilla, lemon oil, orange oil, orange blossom, cherry blossom, cassia, caraway, cognac, jasmine, ylang-ylang, sage, fennel, wasabi, bell pepper, ginger, coriander, coffee, hemp, mint oil from any species of the mint genus, eucalyptus, star anise, cacao, lemongrass, rooibos, flax, ginkgo, hazel, hibiscus, laurel, yerba mate, orange peel, rose, tea (green tea, black tea, etc.), Thai tea citron, juniper, elderflower, basil, bay leaf, cumin, oregano, paprika, rosemary, saffron, lemon peel, mint, shiso, curcuma, cilantro, myrtle, blackcurrant, valerian, pimento, mace, damiane, marjoram, olive, lemon balm, lemon basil, chives, Calvi, verbena, tarragon, limonene, thymol, camphene), flavor enhancers, bitter taste receptor site blockers, sensory receptor site activators or stimulants, sugars and / or sugar substitutes (e.g., sucralose,They may contain saccharides such as acesulfame potassium, aspartame, saccharin, cyclamate, lactose, sucrose, glucose, fructose, sorbitol, or mannitol, as well as other additives such as charcoal, chlorophyll, minerals, botanical materials, or breath fresheners. They may be imitation, synthetic, or natural ingredients, or blends thereof. They may be in any suitable form, such as a liquid (such as an oil), a solid (such as a powder), or a gas.

[0153] The flavouring may suitably comprise one or more mint flavours, suitably mint oil from any species of the mint genus. The flavouring may suitably comprise, consist essentially of or consist of menthol.

[0154] In some embodiments, the flavoring comprises menthol, spearmint, and / or peppermint.

[0155] In some embodiments, the flavoring comprises cucumber, blueberry, citrus fruit, and / or red berry flavor components.

[0156] In some embodiments, the flavoring comprises eugenol.

[0157] In some embodiments, the flavoring comprises flavor components extracted from tobacco.

[0158] In some embodiments, the flavoring comprises flavor components extracted from cannabis.

[0159] In some embodiments, the flavoring may comprise a sensory agent intended to achieve somatic sensations that are usually chemically induced and perceived by stimulating the fifth cranial nerve (trigeminal nerve) in addition to or instead of the olfactory or gustatory nerves, and these may include agents that provide a heating effect, a cooling effect, a tingling effect, or a numbing effect. A suitable heating effect agent may be, but is not limited to, vanillyl ethyl ether, and a suitable cooling agent may be, but is not limited to, eucalyptol or WS-3.

[0160] As used herein, the term "aerosol generating agent" refers to an agent that facilitates the generation of an aerosol. An aerosol generating agent may facilitate the generation of an aerosol by facilitating the initial volatilization and / or condensation of a gas into an inhalable solid and / or liquid aerosol.

[0161] Suitable aerosol generating agents include, but are not limited to, polyols, such as erythritol, sorbitol, glycerol, and glycols, such as propylene glycol and triethylene glycol, as well as non-polyols, such as monohydric alcohols, high boiling point hydrocarbons, acids (such as lactic acid), glycerol derivatives, esters (such as diacetin, triacetin, triethylene glycol diacetate, triethyl citrate or myristates (including ethyl myristate and isopropyl myristate) and aliphatic carboxylic acid esters (such as methyl stearate, dimethyl dodecanedioate and dimethyl tetradecanedioate). The aerosol generating agent may preferably have a composition that does not dissolve menthol. The aerosol generating agent may preferably comprise, consist essentially of, or consist of glycerol.

[0162] As used herein, the term "tobacco material" refers to any material comprising tobacco or a derivative thereof. The term "tobacco material" may include one or more of tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. The tobacco material may comprise one or more of ground tobacco, tobacco fiber, cut tobacco, extruded tobacco, tobacco stem, reconstituted tobacco, and / or tobacco extract.

[0163] The tobacco used to make the tobacco material may be any suitable tobacco, such as a single grade or blend, cut rag or whole leaf, including Virginia and / or Burley and / or Oriental. It may also be "fines" or dust of tobacco particles, expanded tobacco, stems, expanded stems, and other processed stem materials (such as rolled cut stems). The tobacco material may be ground tobacco or reconstituted tobacco material. The reconstituted tobacco material may comprise tobacco fibers and may be formed by casting, a Fourdrinier type approach with back addition of tobacco extract, or extrusion.

[0164] All weight percentages (indicated as wt.%) described herein are calculated on a dry weight basis unless otherwise specified. All weight ratios are also calculated on a dry weight basis. Weights indicated on a dry weight basis refer to the totality of the extract, slurry or material other than water, and may include ingredients that are liquid by themselves at room temperature and pressure, such as glycerol. Conversely, weight percentages indicated on a wet weight basis refer to all ingredients, including water.

[0165] For the avoidance of doubt, where the term "comprising" is used herein in defining the invention or features of the invention, there are also disclosed embodiments in which the invention or features may be defined using the terms "consisting essentially of" or "consisting of" instead of "comprising." Reference to a material "comprising" certain features means that those features are contained in, contained in, or retained within the material.

[0166] The above-described embodiments should be understood as illustrative of the present invention. It should be understood that any feature described in connection with any one embodiment may be used alone or in combination with other features described, and may also be used in combination with one or more features of any other embodiment, or any combination of any other embodiment. Moreover, equivalents and modifications not described above may also be used without departing from the scope of the present invention, as defined in the appended claims.

Claims

1. 1. A method of making an aerosol-forming substrate, the aerosol-forming substrate comprising an aerosol-forming layer attached to a carrier layer, the aerosol-forming layer comprising an amorphous solid; (a) forming a slurry comprising amorphous solid components or precursors thereof; (b) applying the slurry to a carrier, the carrier comprising a hardener such that the slurry gels upon contact with the carrier; (c) drying the gel to form an amorphous solid; A method for providing the above.

2. 10. The method of claim 1, wherein the slurry comprises one or more of a tobacco material, nicotine, an aerosol forming agent, a gelling agent, and a flavoring agent.

3. The method of claim 1 or 2, wherein the hardening agent comprises a calcium source.

4. The method of any one of claims 1 to 3, wherein the carrier comprises a tobacco material comprising the hardener.

5. The method of claim 4 , wherein the carrier comprises reconstituted tobacco.

6. 1. An aerosol-forming substrate comprising an aerosol-forming layer attached to a carrier layer, the aerosol-forming layer comprising an amorphous solid comprising 1-60% by weight of a gelling agent, the carrier layer being a layer of tobacco material.

7. 7. The aerosol-forming substrate of claim 6, wherein the carrier layer comprises a sheet of tobacco material.

8. 8. The aerosol-forming substrate of claim 6 or 7, wherein the carrier layer comprises reconstituted tobacco.

9. An aerosol-generating assembly comprising an aerosol-forming substrate according to any one of claims 6 to 8 and a heater configured to heat the aerosol-forming substrate without combustion.

10. 10. The aerosol generating assembly of claim 9, which is a non-combustion heated device.

11. 10. The aerosol generating assembly of claim 9, which is an e-cigarette hybrid device.

12. An aerosol product article for use in an aerosol generating assembly, comprising an aerosol-forming substrate according to any one of claims 6 to 8.

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