Aerosol-generating items

Abstract

The aerosol-generating article (10) configured to be heated but not combusted includes an aerosol-generating section and a filter section, the aerosol-generating section including at least a tobacco-based aerosol-generating substrate (14) surrounded by a wrapper and including homogenized tobacco material and / or reconstituted tobacco, and the aerosol-generating section further includes a porous aerosol-generating reservoir (16) containing a foam including an aerosol-forming agent and a foam-forming agent.

Description

[Technical field]

[0001] The present invention relates to an aerosol-generating article. [Background technology]

[0002] Aerosol-generating articles have become increasingly popular as alternatives to traditional smoking articles, which contain nicotine and / or tobacco and are expected by consumers to simultaneously produce visible vapor.

[0003] In this context, EP 3046431 B1 relates to an aerosol-generating system with a nicotine source, which may be a liquid tobacco extract. WO 2021 / 053029 relates to a number of aerosol-generating substrates, and WO 2018 / 122375 discloses a tobacco mousse. Finally, further aerosol-generating articles are known from EP 3462935 B1, WO 2020 / 089067 and WO 2020 / 089068.

[0004] Nonetheless, there remains a need for improved aerosol-generating articles with respect to the production of visible vapor. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention therefore provides an aerosol-generating article that is improved with respect to the production of visible vapor. [Means for solving the problem]

[0006] This is achieved by the subject matter of claim 1.

[0007] Thus, the novel aerosol-generating article is configured to be heated but not burned and includes an aerosol-generating section and a filter section. At least the aerosol-generating section includes at least a tobacco-based aerosol-generating substrate, wrapped by a wrapper, and including homogenized tobacco material, such as reconstituted tobacco, and optionally tobacco lamina, for example up to 30% by weight of the tobacco-based aerosol-generating substrate. The homogenized tobacco material may be in the form of a gathered sheet, strip, or strip. The homogenized tobacco material may be manufactured into a sheet or strip from a slurry by papermaking techniques or casting, or from a slurry or dough by extrusion and lamination. The tobacco lamina may also be in the form of strips. Additionally, there may be small amounts (e.g., 15% by weight or less) of cut tobacco stems or stalks, cellulose fibers, or expanded tobacco. The aerosol-generating section further includes a porous aerosol-generating reservoir that contains a foam including an aerosol-forming agent, a foam-forming agent, and optionally a foam stabilizer.

[0008] The tobacco-based aerosol-generating substrate can deliver tobacco taste and nicotine, and the additional aerosol-generating reservoir can generate an increased amount of visible vapor. In this regard, the foam contained within the aerosol-generating reservoir can also be referred to as a mousse or e-mousse, since it carries an e-liquid similar to the liquid in an e-cigarette. As a secondary aspect, the tobacco substrate is essentially solid, preferably formed as a gathered sheet, strip, sliver, etc., with a high tobacco content, preferably tobacco in the form of an agglomerated powder, and is at least preferably not a tobacco mousse or a fine tobacco substrate.

[0009] The foam in the aerosol-generating reservoir keeps the aerosol-forming agent in a non-free liquid state in the mousse and / or prevents the aerosol-forming agent from escaping. In other words, there is no aerosol precursor in a free liquid state in the aerosol-generating reservoir, and preferably no solid matrix or carrier. Thus, the desired effect of generating a large amount of visible vapor can be obtained without the risk of undesired leakage of any kind of liquid from the reservoir. At the same time, by not requiring any solid matrix or carrier (such as ceramic or porous plastic), the structure can be made relatively simple, easily insertable into the paper wrapper (i.e., more deformable or moldable) and biodegradable.

[0010] The effect obtained by the present invention can also be called a visible vapor booster, which results in a satisfying vaping experience performed by the user. As already indicated, this is essentially achieved by a reservoir containing an aerosol former or humectant. In particular, the aerosol-generating liquid can advantageously contain at least one component having a boiling point above 160°C, preferably above 175°C, most preferably between 185°C and 295°C.

[0011] By providing an aerosol-generating reservoir separate from the tobacco-based substrate, the problem of not being able to increase the amount of aerosol-generating agent in the tobacco-based substrate for manufacturability reasons is overcome. The manufacturability problem relates to the fact that if the amount of aerosol-forming agent exceeds a certain value, e.g. 25-30% by weight of the total weight of the substrate, the product becomes too sticky and difficult to handle, and is wrapped up and causes staining of the wrapper. Thus, by providing an aerosol-generating reservoir in addition to and separate from the tobacco-based substrate, an additional amount of visible vapor can essentially be further generated. At the same time, heating of the aerosol-generating reservoir can be ensured by avoiding any kind of thermal barrier around or adjacent to the aerosol-generating reservoir.

[0012] Preferred embodiments are set forth in the further claims.

[0013] Generally, the aerosol-generating reservoir may be positioned anywhere that produces the desired amount of vapor upon heating, in particular a location longitudinally and / or radially adjacent to the tobacco-based substrate is beneficial to ensure heating with a heater having relatively small dimensions while still covering adjacent aerosol-generating substrates and reservoirs as described above.

[0014] Similarly, the aerosol-generating reservoir may have any suitable shape, in particular may be formed as a disk spanning the entire radial dimension of the enclosed internal volume of the aerosol-generating article, which is typically a cylindrical volume. However, the disk may also be arranged in other orientations, in particular at an angle to the radial direction. Moreover, the foam may also be present in the form of a rod, and may not necessarily cover the entire radial dimension of the article, but may extend essentially along the length of the article or at an angle to the article. In a preferred embodiment, the aerosol-generating reservoir is formed of a cylindrical disk positioned adjacent to the tobacco-based aerosol-generating substrate, the ratio of the length of the aerosol-generating reservoir to the length of the tobacco-based aerosol-generating substrate being between 1:1 and 1:5, preferably between 1:2 and 1:4.

[0015] For example, the tobacco-based aerosol-generating substrate has a length of about 14 mm and the aerosol-generating reservoir has a length of about 6 mm.

[0016] The aerosol-generation reservoir may also include one or more longitudinal channels to facilitate the flow of the aerosol through the reservoir.

[0017] It is currently anticipated that compatibility between the tobacco-based substrate and the additional aerosol-generating reservoir will be particularly good if the reservoir is positioned downstream of the substrate, and indeed the aerosol from the reservoir can be more easily delivered without being impeded by the mass of the tobacco-based substrate.

[0018] Nonetheless, both the disks and the plurality of discrete elements, such as beads or pellets, illustrated above that make up the aerosol reservoir may be advantageously embedded in the tobacco-based substrate.

[0019] In a preferred embodiment where the aerosol-generating reservoir is always adjacent to the tobacco-based substrate, the reservoir may essentially be a membrane positioned between the substrate and the outer wrapper.

[0020] Known aerosol forming agents may be constituted by an aerosol-generating liquid, which is nevertheless contained in a manner that prevents leakage, as indicated above.

[0021] The underlying concept of the present invention of increasing the amount of visible vapor is particularly reflected in the preferred criterion that the content of aerosol-forming agent in the reservoir foam is higher than the content of aerosol-forming agent in the tobacco-based substrate.

[0022] Preferably, the foam former is A hydrocolloid selected from the group consisting of agar and gellan gum; an emulsifier selected from the group consisting of lecithin, polyglycerol fatty acid esters, glycerol fatty acid esters, and sorbitan fatty acid esters; and mixtures thereof Preferably, the foam-forming agent comprises or consists of gellan gum.

[0023] The amount of foam-forming agent is preferably from 1 to 15% by weight, on a dry basis, of the aerosol-generating reservoir, more preferably from 2 to 10% by weight, on a dry basis, of the aerosol-generating reservoir, and most preferably from 3 to 8% by weight, on a dry basis, of the aerosol-generating reservoir.

[0024] Also preferably, the foam stabilizer is selected from the group consisting of cellulose gums, hydroxyalkylated carbohydrates, derivatives thereof, and mixtures thereof, and / or the foam stabilizer comprises cellulose gums, in particular carboxymethylcellulose (CMC) or derivatives thereof, and / or cellulose fibers.

[0025] The amount of foam stabilizer is preferably 8-30% by weight of the aerosol-generating reservoir on a dry basis, preferably 10-28% by weight of the aerosol-generating reservoir on a dry basis, most preferably 15-25% by weight of the aerosol-generating reservoir on a dry basis. In one example, the foam stabilizer comprises 8-12% by weight of cellulose fibres on a dry basis and 8-12% by weight of carboxymethylcellulose in the aerosol-generating reservoir on a dry basis. In another example, the foam stabilizer comprises 15-18% by weight of carboxymethylcellulose in the aerosol-generating reservoir.

[0026] All of the above materials provide excellent results with respect to foam formation and stabilization.

[0027] The foam comprises an open-celled, porous structure, particularly where this structure is formed essentially from foam-forming agents and foam stabilizers.

[0028] This is also true with respect to the formation of sufficient amounts of visible vapor when the aerosol forming agent is present in an amount of at least 50% by weight, preferably at least 60% by weight, and most preferably 70-85% by weight, of the total weight of the aerosol reservoir on a dry basis.

[0029] Preferably, the aerosol former comprises a glycol derivative such as propylene glycol, or glycerin, or glycerol, or a sebacate ester, or a combination thereof, preferably glycerol, and / or the aerosol former comprises at least 30% glycerin by weight, preferably at least 50% glycerin by weight, most preferably about 63% glycerin by weight, of the total weight of the aerosol former on a dry basis. Particularly good visible vapor formation is obtained using these materials in the amounts described.

[0030] The aerosol-generating article described herein includes the above sections wrapped in a wrapper. The article may further include a mouthpiece downstream of the tobacco-based aerosol-generating substrate, which may also be contained within the wrapper. Additionally, the mouthpiece may include a filter and a spacing and / or cooling element disposed between the aerosol-generating section and the filter. The wrapper may be made, for example, from cigarette paper and may or may not be metallized. In either case, the wrapper may be designed to avoid scorching of the foam.

[0031] With regard to the filter provided in the mouthpiece, this filter can be adapted to provide a relatively low, in any case acceptable, pressure loss, so that the flavor intensity and nicotine yield remain optimal. Additionally, the presence of the spacing and / or cooling element first cools the generated aerosol, so that an uncomfortably hot aerosol is prevented from entering the user's mouth. Moreover, the spacing element can be used to give the article according to the invention a size that is compatible with well-established aerosol generating devices in which the article can be used. Due to the fact that the article described herein can be used with the present aerosol generating device, the user has the advantage that only a single device is needed and only one device has to be maintained.

[0032] The spacing may include a hollow tubular member, which may be made of paper. Similarly, the cooling element may include a hollow tubular member, which may be made of paper. With regard to the length of the hollow tubular member, a length of 10 to 25 mm, preferably 18 to 22 mm, is currently preferred. As described in EP 3881699 A1, a further tubular member having a smaller inner diameter than the spacing and / or cooling member (i.e. the "central hole" segment) may be positioned between the cooling tubular member and the filter segment.

[0033] In one example, the mouthpiece includes, in a downstream direction, a cooling element, a central hole segment, and a filter segment. The central hole segment can be a segment positioned between the spacing and the filter segment. The mouthpiece can be proximate to the mouth end to protect the surface from steam.

[0034] The mouthpiece and aerosol-generating section are preferably individually wrapped in wrappers and assembled by assembling the wrappers, i.e., the tipping paper.

[0035] A ventilation zone may be provided within the mouthpiece, preferably through the spacing and / or cooling element. The ventilation zone may be formed by a plurality of perforations provided through the wrapper and hollow tubular member and / or through the wrapper and central hole segment.

[0036] The aerosol-generating substrate may have any suitable extension, but when the aerosol-generating substrate extends from the upstream end towards the downstream end of the article, it keeps the articles described herein compact, and the preferred overall length of the article is from 50mm to 70mm, more preferably from 55mm to 65mm, even more preferably from 58mm to 62mm, the length of the aerosol-generating section is preferably from about 15mm to 25mm, and the length of the mouthpiece is preferably from about 30mm to 45mm.

[0037] A front plug may be added upstream of the tobacco-based aerosol-generating substrate. The front plug may function, for example, to prevent the tobacco substrate from falling out of the tobacco-based substrate and / or to maintain the tobacco-based substrate in a compressed state. The front plug may be a flat segment or a hollow tubular segment made of a fibrous material such as cellulose acetate or a paper sheet or a nonwoven fabric.

[0038] The invention will now be described with reference to non-limiting examples and drawings. [Brief description of the drawings]

[0039] [Figure 1] 1 illustrates various embodiments of an aerosol-generating article. [Diagram 2] 1 illustrates various embodiments of an aerosol-generating article. [Diagram 3] 1 illustrates various embodiments of an aerosol-generating article. [Figure 4] 1 illustrates various embodiments of an aerosol-generating article. [Diagram 5] 1 illustrates various embodiments of an aerosol-generating article. [Figure 6] 1 illustrates various embodiments of an aerosol-generating article. [Figure 7] 1 illustrates various embodiments of an aerosol-generating article. [Figure 8] The effects obtained by the present invention will be described. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] As can be seen from FIG. 1, the aerosol-generating article 10 described herein is essentially rod-shaped or cylindrical, with about one-third to one-half of its length corresponding to an aerosol-generating section heated by a heating zone defined by an external heater of the aerosol-generating device, indicated at 12. The aerosol-generating section comprises a tobacco-based substrate 14 and an additional aerosol-generating reservoir 16, both of which are therefore located within the heating zone 12 in use. The aerosol-generating article further comprises, in the downstream direction of the aerosol flow path, a cooling tubular member 22 and a filter 24. The cooling tubular member 22 may, for example, comprise a paper tube or any other at least partially rigid hollow structure that allows the aerosol to provide sufficient space and surface for cooling. As described in EP 3881699 A1, a further tubular member having a smaller internal diameter (i.e. a "central bore" segment) than the cooling member may be positioned between the cooling tubular member 22 and the filter. The filter 24 may include one or more filter segments, such as filter segments made of cellulose acetate or paper sheets. The filter may include a flavor-releasing filter, for example a frangible capsule filter.

[0041] In the embodiment of Figure 1, the tobacco-based substrate 14 is essentially divided in half by the aerosol-generation reservoir 16, which in this case has the shape of a disk located between the two halves. In other words, the aerosol-generation reservoir in this case has a longitudinal extension, in other words an extension along the cylindrical axis, which extension is significantly smaller, for example only about 10-20% of the tobacco-based substrate half.

[0042] In one example, the article comprises a tobacco-based substrate having a length of 11 to 17 mm, preferably 14 mm, an aerosol-generating reservoir of 4 to 8 mm, preferably 6 mm, and a hollow tubular member comprising a paper tube of 15 to 25 mm, preferably 20 mm, and having a length of 40 to 80 mm, preferably 60 mm.

[0043] These dimensions essentially correspond to those shown for the embodiment of Figure 2, in which the aerosol-generation reservoir 16 is positioned downstream of the tobacco-based substrate 14. In either case, both the substrate 14 and the reservoir 16 extend across the entire radial dimension of the article 10, the exterior of which is essentially defined by the wrapper.

[0044] The dimensions stated also apply to the embodiment of Figures 3 and 4, the embodiment of Figure 3 having a generally central hole or longitudinal channel 20. As a further example, the embodiment of Figure 4 has a plurality of longitudinal holes or channels 20, in the case shown four. It will be appreciated that the disk of the embodiments of Figures 1, 3 and 4 need not be located exactly in the longitudinal center of the tobacco-based substrate 14, but could be located further upstream or downstream, with a downstream location being preferred. Alternatively or in addition to the disk shown in Figures 1-4, the aerosol-generation reservoir could also be formed of a plurality of discrete elements 18, as shown in Figure 5.

[0045] As a further alternative, in the embodiment of Figure 6, the aerosol-generation reservoir 16 is formed as a thin film between the radially inner tobacco-based substrate 14 and the outer wrapper. The thin film can extend all the way around, but can also be shorter or longer so as to overlap. Moreover, the thin film can have an axial extension that corresponds to the axial extension of the tobacco-based substrate 14, but can also be shorter or longer.

[0046] As a further alternative, in the embodiment of Figure 7, the aerosol-generating article 10 differs from the aerosol-generating article 10 of the embodiment of Figure 1 in that the front plug 26 is positioned such that the aerosol-generating section is axially located between the front plug 26 and the cooling tubular member 22. In other words, the front plug 26 is provided upstream of the tobacco-based aerosol-generating substrate 14.

[0047] The front plug 26 may be flat or hollow. The front plug 26 may be made of a fibrous material. In such cases, the fibrous material may include at least one of cellulose acetate, a paper sheet, or a nonwoven fabric.

[0048] Similar to the embodiments of Figures 3 and 4, the aerosol-generating article 10 of the embodiment of Figure 7 may include a generally central hole or longitudinal channel. It is also contemplated that the aerosol-generating article 10 of the embodiment of Figure 7 may include an aerosol-generating reservoir formed of a plurality of discrete elements or formed as a thin film, as in the embodiments of Figures 5 and 6.

[0049] FIG. 8 basically summarizes the benefits provided by the present invention, which is faster and more extensive steam generation compared to existing products.

[0050] An example of a recipe for the aerosol-generating reservoir, i.e. (e) mousse or foam, is as follows:

[0051] [Table 1]

[0052] The e-mousse may include flavorings, such as ethyl vanillin, menthol, spearmint oil, berry, fruit, root, or plant extracts or oils.

[0053] The e-mousse may include a pH adjuster selected from, for example, one or more of sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, and the like, and mixtures thereof.

[0054] Homogenized tobacco material, in the context of this disclosure, refers to a material formed of agglomerated particulate tobacco (e.g., tobacco powder), an aerosol-forming agent, and optionally an extrinsic binder (other than tobacco intrinsic binders).

[0055] The homogenized tobacco material may have any one or more of the following characteristics: - Tobacco particle size D90: about 20-1000 microns, preferably 30-300 microns. D90 represents the maximum particle size below which 90% of the sample volume lies. It is measured using a Malvern Mastersizer 3000 laser diffraction instrument using the dry dispersion method. - The material is preferably formed into sheets from a slurry by a paper making process or cast sheets or from a slurry or dough by an extrusion / lamination process. The sheet can be inserted in gathers or cut or broken into strands, pieces, strips, fragments, etc. Finally, the sheet can be crimped. Examples of laminate sheets can be obtained from WO2021144676, WO2021144043, and WO2020058814. Examples of papermaking sheets are shown in WO2017051034. Examples of cast sheets are shown in International Publication No. 2016050471 and International Publication No. 2016050470. 、 This is given in WO2012164009. - Dry basis density (or mass to surface area ratio) of homogenized tobacco material: 800-1450 mg / cm 3 , preferably 900 to 1200 mg / cm 3 . - Content of aerosol-forming agent in the sheet: 8-25% by weight, preferably 10-18% by weight, based on the dry weight of the homogenized tobacco material.

[0056] The aerosol forming agent may preferably be a polyhydric alcohol, which may include glycerin, propylene glycol, sorbitol, xylitol, and erythritol. These polyhydric alcohols may be used alone or in combination of two or more. The homogenized tobacco material may include binders (e.g., pectin, guar gum, locust bean gum, alginates, starch, CMC, dextran, etc.) Binders may be required when starting from a slurry or dough, especially for cast or extruded sheets. - It is possible to blend different homogenized tobacco materials with tobaccos of different origins / varietals (Burley, Virginia, Oriental, etc.) and / or different manufacturing processes (cast, paper, laminated). Optionally, blends of the homogenized tobacco material with tobacco lamina, cellulosic fibers, nonwoven fibers, and the like may also be provided.

[0057] The packing density of the tobacco-based aerosol-generating substrate within the wrapper is at least 250 mg / cm 3 , preferably at least 300 mg / cm 3 , or usually 500 mg / cm 3 Less than 400 mg / cm 3 Less than 350 mg / cm, more preferably 350 mg / cm 3 It can be the following:

Claims

1. An aerosol-generating article (10) configured to be heated but not combusted, comprising an aerosol-generating section and a filter section, wherein the aerosol-generating section is wrapped by a wrapper and includes at least a tobacco-based aerosol-generating substrate (14) containing a homogenized tobacco material, and the aerosol-generating section further includes a porous aerosol-generating reservoir (16) containing a foam comprising an aerosol-forming agent and a foam-forming agent.

2. The aerosol-generating article (10) according to claim 1, wherein the aerosol-generating reservoir (16) is positioned adjacent to the tobacco-based aerosol-generating substrate (14) in the longitudinal direction and / or the radial direction.

3. The aerosol-generating article (10) according to claim 1 or 2, wherein the aerosol reservoir (16) is formed as a disk.

4. The aerosol-generating article (10) according to claim 1 or 2, wherein the aerosol reservoir (16) includes at least one longitudinal channel (20).

5. The aerosol-generating article (10) according to claim 1 or 2, wherein the aerosol reservoir (16) is positioned downstream of the tobacco-based aerosol-generating substrate (14).

6. The aerosol-generating article (10) according to claim 1 or 2, wherein the aerosol-generating reservoir (16) is formed of a plurality of discrete elements (18) embedded in the tobacco-based aerosol-generating substrate (14).

7. The aerosol-generating article (10) according to claim 1 or 2, wherein the aerosol-generating reservoir (16) is a thin film between the tobacco-based aerosol-generating substrate (14) and the wrapper.

8. The aerosol-generating article (10) according to claim 1 or 2, wherein the additional aerosol-generating reservoir (16) contains an aerosol-generating liquid.

9. The aerosol-generating article (10) according to claim 1 or 2, wherein the content of the aerosol-forming agent in the foam is higher than the content of the aerosol-forming agent in the tobacco-based aerosol-generating substrate (14).

10. The foaming agent is selected from the group consisting of hydrophilic colloids selected from the group of agar and gellan gum, lecithin, polyglycerol fatty acid esters, glycerol fatty acid esters, sorbitan fatty acid esters, and emulsifiers selected from mixtures thereof, and the aerosol generating article (10) according to claim 1 or 2.

11. The foam further comprises a foam stabilizer, and the aerosol generating article (10) according to claim 1 or 2.

12. The foam stabilizer is selected from the group consisting of cellulose gum, hydroxyalkylated carbohydrates, derivatives thereof, and mixtures thereof, and the aerosol generating article (10) according to claim 11.

13. The foam stabilizer includes cellulose gum, particularly carboxymethyl cellulose (CMC) or a derivative thereof and / or cellulose fibers, and the aerosol generating article (10) according to claim 11.

14. The amount of the foam stabilizer is 10 to 30% by weight of the aerosol generating reservoir, preferably 12 to 28% by weight of the aerosol generating reservoir, more preferably 15 to 25% by weight of the aerosol generating reservoir, and the aerosol generating article (10) according to claim 11.

15. The foam stabilizer contains at least 10% by weight of cellulose fibers in the aerosol generating reservoir, preferably about 12% by weight of cellulose fibers in the aerosol generating reservoir, and / or at least 10% by weight of carboxymethyl cellulose in the aerosol generating reservoir, preferably about 11% by weight of carboxymethyl cellulose in the aerosol generating reservoir, and the aerosol generating article (10) according to claim 11.

16. The aerosol forming agent is present in an amount of at least 50% by weight, preferably at least 60% by weight, most preferably 70 to 85% by weight of the total weight on a dry basis of the aerosol reservoir, and the aerosol generating article (10) according to claim 1 or 2.

17. The aerosol forming agent includes glycol derivatives such as propylene glycol, or glycerin, or glycerol, or sebacic acid esters, or combinations thereof, and preferably includes glycerol, and the aerosol generating article (10) according to claim 1 or 2.

18. The aerosol-forming agent contains at least 30% by weight of glycerin, preferably at least 50% by weight of glycerin, most preferably at least 65% of glycerin, and most preferably at least 70% by weight of glycerin, based on the dry weight of the aerosol-forming agent, of the aerosol-generating article (10) according to claim 1 or 2.

19. The homogenized tobacco material is in the form of a sheet with gathers, shreds, or strips, of the aerosol-generating article (10) according to claim 1 or 2.

20. The homogenized tobacco material is manufactured from a slurry by papermaking technology or casting, or from a slurry or dough into a sheet or strip by extrusion and lamination, of the aerosol-generating article (10) according to claim 1 or 2.

21. The tobacco-based aerosol-generating substrate (14) further comprises tobacco leaf lamina, of the aerosol-generating article (10) according to claim 1 or 2.

22. The tobacco leaf lamina is in the form of shreds, of the aerosol-generating article (10) according to claim 21.

23. A small amount of cut tobacco stems or petioles, cellulose fibers, or expanded tobacco is present in the tobacco-based aerosol-generating substrate (14), of the aerosol-generating article (10) according to claim 1 or 2.

24. The small amount of cut tobacco stems or petioles, cellulose fibers, or expanded tobacco is 15% by weight or less of the tobacco-based aerosol-generating substrate (14), of the aerosol-generating article (10) according to claim 23.

25. The aerosol-generating reservoir is formed by a cylindrical disk positioned adjacent to the tobacco-based aerosol-generating substrate, of the aerosol-generating article (10) according to claim 1 or 2.

26. The ratio of the length of the aerosol-generating reservoir to the length of the tobacco-based aerosol-generating substrate is 1:1 to 1:5, preferably 1:2 to 1:4, of the aerosol-generating article (10) according to claim 1 or 2.

27. The length of the tobacco-based aerosol-generating substrate is 13 mm to 15 mm, preferably about 14 mm, and / or the length of the aerosol-generating reservoir is 5.5 mm to 6.5 mm, preferably about 6 mm, of the aerosol-generating article (10) according to claim 1 or 2.

28. The amount of the foaming agent is 1 to 15% by weight of the aerosol generating storage part, preferably 2 to 10% by weight of the aerosol generating storage part, more preferably 3 to 8% by weight of the aerosol generating storage part, the aerosol generating article (10) according to claim 1 or 2.

29. The aerosol generating article (10) according to claim 1 or 2, further comprising a mouthpiece downstream of the aerosol generating substrate.

30. The aerosol generating article (10) according to claim 29, wherein the mouthpiece is housed within the wrapper.

31. The aerosol generating article (10) according to claim 29, wherein the mouthpiece includes a filter.

32. The aerosol generating article (10) according to claim 29, wherein the length of the mouthpiece is about 30 to 45 mm.

33. The aerosol generating article (10) according to claim 29, wherein the mouthpiece includes a spacing maintaining and / or cooling element provided between the aerosol generating section and the filter section.

34. The aerosol generating article (10) according to claim 33, wherein the spacing maintaining and / or the cooling element includes a hollow tubular member.

35. The aerosol generating article (10) according to claim 34, wherein the hollow tubular member is formed of paper.

36. The aerosol generating article (10) according to claim 34, wherein the hollow tubular member has a length of 10 to 25 mm, preferably 18 to 22 mm.

37. The aerosol generating article (10) according to claim 34, wherein the mouthpiece preferably includes a ventilation zone extending through the hollow tubular member.

38. The aerosol generating article (10) according to claim 33, wherein the mouthpiece preferably includes a ventilation zone extending through the spacing maintaining and / or cooling element.

39. The aerosol generating article (10) according to claim 1 or 2, wherein the wrapper is made of cigarette paper for rolling cigarettes.

40. The aerosol generating article (10) according to claim 1 or 2, wherein the wrapper is designed to avoid burning of the foam.

41. The total length of the aerosol generating article (10) is 50 mm to 70 mm, preferably 55 mm to 65 mm, more preferably 58 mm to 62 mm, the aerosol generating article (10) according to claim 1 or 2.

42. The aerosol generating article (10) according to claim 1 or 2, wherein the length of the aerosol generation section is about 15 mm to 25 mm.

43. The aerosol generating article (10) according to claim 1 or 2, further comprising a front plug provided upstream of the tobacco-based aerosol generating substrate.

44. The aerosol generating article (10) according to claim 43, wherein the front plug is a flat segment.

45. The aerosol generating article (10) according to claim 43, wherein the front plug is a hollow segment.

46. The aerosol generating article (10) according to claim 43, wherein the front plug is made of a fibrous material, and preferably, the fibrous material includes at least one of cellulose acetate, paper sheet, or non-woven fabric.

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