KR20220045029A - Aerosol-generating tobacco-containing composition comprising medium chain triglycerides - Google Patents

Abstract

The present invention relates to an aerosol-generating tobacco-containing composition, preferably provided in the form of a foam or mousse, and an aerosol-generating article comprising said composition, the composition comprising a particulate tobacco material and a lipid, wherein the lipid is a medium chain triglyceride and the ratio of medium chain triglycerides to tobacco-containing material (by dry weight) is from 1:3 to 1:5.

Description

Aerosol-generating tobacco-containing composition comprising medium chain triglycerides

The present invention relates to a tobacco material comprising an aerosol-generating material and an aerosol-generating tobacco-containing composition comprising a medium chain triglyceride, and an aerosol-generating article comprising such a composition, in particular a heat-not-burn smoking article. will be.

A number of prior art documents relating to aerosol-generating articles and devices thereof disclose the use of such articles as novel smoking forms. Such devices include, for example, electrically heated aerosol-generating devices in which the aerosol is generated by transferring heat from the heating element of the aerosol-generating device to the aerosol-generating substrate or material.

Homogenised tobacco materials are commonly used in the manufacture of tobacco products. Some of the tobacco plants that are less suitable for cut filler production, such as tobacco stems or tobacco powder, are materials commonly used for homogenizing tobacco materials. Examples of common forms of homogenised tobacco material are, for example, powder form, reconstituted tobacco sheets, and cast leaves.

In heated aerosol-generating articles, it is reported that the aerosol-forming substrate is heated to a relatively low temperature, for example below 350° C., to prevent combustion. An amount of inhalable aerosol may then be released from the aerosol-generating article.

The released aerosol originates from an aerosol former comprised in the tobacco material which is granulated or can be granulated. In order to be released, this aerosol former must migrate within the body of the homogenised tobacco material to the surface of the homogenised tobacco material. In the process, other volatile compounds, such as nicotine, migrate outward from the body of the homogenised tobacco material in a similar manner, eventually being released as an aerosol in an amount.

Document WO 2017/077112 A1 relates to a homogenised tobacco material comprising tobacco and a lipid having a melting point of 50°C to 150°C. This document discloses that a homogenised tobacco material comprising a fusible lipid component can advantageously reduce the amount of tobacco used while providing an equivalent nicotine or aerosol yield. Moreover, the inclusion of a fusible lipid component also enables the transport of aerosol formers and other volatile compounds in the homogenized tobacco material to the surface region of the tobacco material. Nevertheless, these advantages come at the cost of the fact that the attendant taste and off-flavors due to the soluble lipid component cannot be completely prevented.

Accordingly, it would be desirable to provide an aerosol-generating tobacco-containing material for an aerosol-generating article that does not impart an objectionable odor or taste to the consumer. Moreover, it would be particularly desirable to improve the delivery of volatile compounds, including nicotine, especially when operating at lower temperatures. Additionally, it would also be desirable to provide an aerosol-generating article having a new type of homogenised tobacco material suitable for the delivery of volatile compounds.

The inventors of the present invention have found a solution to this problem through an aerosol-generating tobacco-containing composition as defined in the claims.

Accordingly, a first aspect of the present invention is an aerosol-generating tobacco-containing composition provided in the form of a foam or mousse, comprising a particulate tobacco material and a lipid, wherein the lipid is a medium chain triglyceride and a medium chain triglyceride to tobacco-containing material (by dry weight). ) is from 1:3 to 1:5.

Accordingly, a second aspect of the invention is to provide an aerosol-generating article comprising an aerosol-generating tobacco-containing composition provided in the form of a foam or mousse according to the invention.

Accordingly, a third aspect of the present invention is a process for the preparation of an aerosol-generating tobacco-containing foam or mousse comprising the steps of (a) mixing an aerosol former, a foam former, and optionally a solvent under heating; (b) aeration of the mixture with gas or air for at least 5 minutes at room temperature; (c) adding a tobacco-containing component and/or an inhalable agent to the mixture; (d) aeration of said mixture, optionally with gas or air; (e) adding medium chain triglycerides to the mixture, wherein the ratio of medium chain triglycerides to tobacco-containing material (by dry weight) is from 1:3 to 1:5; (f) aeration of the mixture with gas or air for at least 5 minutes at room temperature; (g) to provide a method comprising the step of adding a foam stabilizer.

The inventors of the present invention have discovered that aerosol-generating tobacco-containing compositions, more notably when provided in foam or mousse form, unexpectedly solve the problem of the attendant taste and odor of homogenised tobacco materials in which lipids are used. . We have found that medium chain triglycerides (MCT) are a better option for mixing with homogenized tobacco materials compared to lipids because they are appreciated for their clean organoleptic qualities. MCT is odorless and tasteless, so it does not cause any odor to the product.

In addition, the present inventors found that when the ratio of MCT to homogenized tobacco material (based on dry weight) is 1:3 to 1:5, the porosity of the composition is greatly increased, the texture of the resulting product is more foamy, and the flavor of tobacco that consumers are looking for a lot. and odor were also found to be significantly increased. Interestingly, this effect is not observed when the ratio of MCT to homogenised tobacco material (by dry weight) is outside this range, ie greater than 1.5 or less than 1.3.

For example, if the MCT is less than 20% by weight of the total weight on a dry weight basis, irrespective of the final amount of tobacco-containing material, since a smaller amount of the volatile compound is released along with a certain amount of the aerosol, these effects (The porosity and fluffiness of the composition and the stronger tobacco flavor (eg in the form of a mousse or foam)) were not optimal. The stronger tobacco flavor and aroma obtained in the present invention is due to MCT. MCTs are widely used in the perfume industry because of their excellent organoleptic quality and solvent ability. In addition, MCT is excellent for flavor extraction. Perhaps for this reason, at higher proportions of MCT (i.e., the ratio of MCT to tobacco-containing material is greater than or equal to 1.5 and less than 1.3), this ratio of MCT to tobacco exhibits superior porosity in the final product, resulting in higher amounts of MCTs from the aerosol-generating substrate. Since the volatile compounds can be released with a certain amount of the aerosol, the consumer immediately notices a stronger tobacco aroma and flavor upon use. The inventors have also found that the aerosol-generating tobacco-containing composition as claimed herein generally has a micropore size of less than 2 nm and that the composition has a typical porosity of 1-3 g/cm ³ . Because of these characteristics of the composition, an aerosol-generating article comprising such a composition is readily distinguishable from other articles and is therefore a preferred choice.

In one preferred specific embodiment, the ratio of medium chain triglycerides to tobacco-containing material (by dry weight) is 1:3. This embodiment is the most preferred as it is found to have the highest delivery rate of a volatile compound such as nicotine compared to all other samples with different ratios. The inventors of the present invention have found that when the ratio of MCT to tobacco-containing material (by dry weight) is 1:3, the porosity and texture of the aerosol-generating material of the final product is optimal for releasing most of the volatile compounds as an aerosol (e.g. : A mixture of open pore foam and closed-cell foam) was found.

In one particular preferred embodiment, the composition is provided in the form of a foam or mousse. When the aerosol-generating material is provided in foam or mousse form, in particular the ratio of MCT to tobacco-containing material (by dry weight) is 1: 3, the volume of the porous microstructure of the foam is improved by the use of MCT. In this regard, it is disclosed herein that foam formers and foam stabilizers are involved in the formation of the foam and maintenance of the foam microstructure.

To this end, it is emphasized again that the present invention in foam or mousse form is applicable to all other embodiments discussed herein.

According to one embodiment, the mixture is aerated in each stage using heated gas or air at a temperature between 35° C. and 50° C. for at least 10 minutes. This elevated temperature increases the consistency and nicotine delivery of an aerosol-generating tobacco-containing foam or mousse, for example, compared to a product made in powder form. In addition, the volume of the porous microstructure of the foam can be improved by using MCTs at these temperatures.

In another preferred embodiment, the aerosol-generating tobacco-containing composition comprising medium chain triglycerides is aerated at room temperature for at least 5 minutes, preferably at least 10 minutes. The aeration step referred to herein increases the volume of the porous microstructure of the aerosol-generating material of the present invention.

According to one embodiment, the particulate tobacco material has a particle size of less than 100 μm, preferably less than 90 μm, 80 μm, 70 μm, 60 μm, or less than 50 μm, more preferably between 40 μm and 90 μm. Given that the particle size of the tobacco-containing material is 100 μm, the aerosol-generating material of the present invention consisting mainly of tobacco material will have a homogenized tobacco particle size. Also, due to the small particle size, the amount of surface area per unit volume of the homogenized tobacco material also increases. Thus, volatile compounds from an aerosol-generating material can be easily and more efficiently released into the aerosol.

According to another embodiment, the lipid is derived from palm kernel oil or coconut oil.

In another embodiment, the lipid consists of caprylic acid (C8:0), capric acid (C10:0), and/or preferably lauric acid (C12:0).

In another preferred embodiment, more than 50 wt %, preferably more than 60 wt % or 66 wt % of the lipid, based on the total weight of the lipid, is MCT caprylic acid (C8:0).

According to another embodiment, the composition further comprises maltodextrin gum acacia, silicon dioxide, and/or sunflower lecithin.

In a further embodiment, the composition comprises any of a propellant, an aerosol former, a foam stabilizer, and/or a foam former.

According to a further embodiment, the composition comprises the aerosol former in a proportion of 10-80 wt %, preferably 30-70 wt %, of the weight of the aerosol-generating material.

"About" or "approximately" in reference to a given numerical value means including values within 10% of the specified numerical value. All values given herein are to be understood as complemented by the word "about" unless the context clearly indicates to the contrary.

The singular form does not exclude the plural and should therefore be treated broadly.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Tobacco-containing materials include any compound, mixture, particulate material, which contains and/or carries components of tobacco, such as tobacco, tobacco particles, tobacco flavor and/or nicotine, which are artificially or naturally contained in tobacco; and/or a solution. In contrast, an example of an artificially added, non-tobacco flavoring would be menthol.

As used herein, the term "aerosol-generating article" refers to an aerosol-generating article for generating an aerosol comprising an aerosol-generating material intended to be heated rather than combusted to liberate volatile compounds capable of forming an aerosol.

As used herein, the term “aerosol-generating material” refers to a material capable of releasing volatile compounds capable of forming an aerosol upon heating. Aerosols generated from the aerosol-generating materials of the aerosol-generating articles described herein may be visible or invisible, and include vapors (eg, fine particles of substances in the gaseous state that are usually liquid or solid at room temperature) as well as It may contain droplets of gas and condensed vapor.

As used herein, the term "medium chain triglyceride" is used to define an oil comprising one or more triglycerides having two or three fatty acid chains, each triglyceride having a chain length of 6 to 12 carbon atoms. Thus, the fatty acid chain may include one or more of caproic acid (C6), caprylic acid (C8), capric acid (C10), and lauric acid (C12). They may be present in the medium chain triglyceride oil in any combination and in any relative amount so long as the desired properties of the medium chain triglyceride oil are obtained. For each triglyceride in the medium chain triglyceride oil, the three fatty acid chains may have the same length or different lengths from each other, so long as at least two of the fatty acid chains have a chain length of 6 to 12 carbon atoms. For each triglyceride, the three fatty acid chains may be the same or two or more of the fatty acid chains may be different from each other. The triglycerides may individually be saturated or unsaturated.

As used herein, the term “homogenized tobacco material” includes all tobacco material formed by the agglomeration of tobacco material particles with or in admixture with other plant material. For example, the homogenized tobacco material may be provided in granular (powder) form, or a sheet or web of homogenized tobacco material by agglomerating the particulate tobacco material obtained by grinding or pulverizing one or both of tobacco leaf sheets and tobacco leaf stems. can be provided as In addition, the homogenized tobacco material may contain minor amounts of one or more of tobacco powder, tobacco fines, and other particulate tobacco by-products formed during the processing, handling, and transportation of tobacco. Homogenized tobacco material may also be provided in small particle sizes (eg, less than 100 μm as claimed herein) and then used to construct an aerosol-generating material, which may be in the form of a foam or mousse.

The aerosol former can be, for example, any compound, mixture, and/or solution capable of forming an aerosol when heated and/or mixed with a formulation containing a tobacco component. Well-known examples include wetting agents such as glycerin and propylene glycol, other alcohols such as ethanol, and the like.

As used herein, an open-pore foam is a plurality of interconnected pores capable of containing air and a fluid, particularly a mixture of a wetting agent/liquid aerosol-forming substrate, such as foam stabilizers, solid components such as tobacco particles, and some solvents, etc. It is to be understood as a foam that can be considered formed from a structural material derived from a foam former that acts with its interacting components), in which most of the pores form individual pockets and each pocket allows fluid to pass between the pores. In contrast to closed-pore foams that are completely surrounded by a pore-forming material to substantially prevent free passage, at least a significant portion (eg, greater than 50% by volume) of the pores in the foam are fluidly interconnected. After cooling or heating of the aerosol-generating material comprising the MCT, it appears that vapor is released from the mousse and substantially all of the wetting agent is released based on the gravimetric measurements of the portions of the mousse before and after heating, which means that the wetting agent migrates through the adjacent pores. It is currently believed that most of the mousses formed as described herein are open-pore mousses, as they cannot be readily described if the surface of the moose portion cannot be reached. However, alternative explanations cannot be completely excluded (eg, the closed pores may be connected by rupture of the closed pores due to the pressure of vaporized gas, etc.).

The electronic cigarette (e-cigarette) or similar device such as an electronic pipe or a heated device referred to in the present invention is not particularly limited and may be used to provide a user with an inhalable aerosol. According to certain embodiments, it may include a mouthpiece, a heater, a receptacle such as a pod, a stick, a capsule, and a casing.

As used herein, the term “melting point” refers to the clear or complete melting point of a medium chain triglyceride. This corresponds to the temperature (in degrees Celsius) where the oil is completely liquid and no solid particles remain. A number of methods known in the art can be used to determine the clear point melting point of an oil, such as the capillary technique or the Stuart SMP50 melting point apparatus.

As used herein, wt % is to be understood as a weight percentage based on the total weight of the material on a dry basis, unless otherwise specified. In this specification, all amounts are given in wt %, unless otherwise indicated or otherwise clear from context. In this specification, all amounts given in wt % also add up to 100 wt %. Accordingly, unless otherwise specified or otherwise clear from the context, weight percentages are calculated by dividing the mass of each component by the total mass.

The present invention relates to an aerosol-generating tobacco-containing composition comprising a lipid in the form of a medium chain triglyceride (MCT) oil. The composition may be provided in many forms, such as one or more sheets of homogenised tobacco material, or may be provided in foam or mousse or powder form, wherein the ratio of MCT to tobacco-containing material (on a dry basis) is from 1:3 to 1:5. . It is emphasized herein that the present invention is not limited to these two forms, but other forms are possible, such as a powder form, a gel, or a carrier coated with the aerosol-generating material of the present invention.

Because the melting point of MCTs is about 20°C, the MCTs discussed herein are always in completely liquid form at room temperature (eg, 22-24°C). Homogenized tobacco material thus comprises MCT oil in liquid form dispersed within a matrix (solid or semi-solid such as a foam or gel) of the tobacco-containing material.

The MCTs used in the present invention are commercially available. For example, it is a product of the Sensory Effects Company (Product ID: Richmix 5025 IP (175755)) comprising a 52% fat MCT oil powder creamer made from palm-derived, palm kernel and/or coconut-based fatty acids. According to the product description, maltodextrin and gum acacia, silicon dioxide, and sunflower lecithin are also included in the product. The MCT has a melting point significantly lower than 20°C, and the MCT C6:C8:C10:C12 ratio is about 1:20:10:1. That is, the content of C6 and C12 in the MCT used in the present invention is negligible.

To this end, it is reiterated that any commercially available MCT will be suitable for use in the present invention, as long as the commercially available product meets the criteria and is marketed as a medium chain triglyceride oil.

The use of medium chain triglyceride oils, which have a melting point of less than 20° C. and thus are liquid at room temperature, also provides advantages in the production of homogenized tobacco materials. For example, because MCT oil naturally exists as a liquid at room temperature, compared to other lipids such as waxes, MCT oil does not require heating and melting. Homogenised tobacco material, usually derived from pulp, does not need to be heated to keep the oil in liquid form. Therefore, the manufacturing process can be performed without external heating. This not only simplifies the manufacturing process but also prevents loss of volatile compounds from the tobacco-containing material during the external heating process. Moreover, the use of MCTs in homogenised tobacco materials also addresses the stickiness problem commonly found in aerosol-generating articles where lipids are used in manufacturing processes. The sticky nature of the lipid prevents the efficient release of volatile compounds compared to MCTs.

The inventors of the present invention confirmed from the test results that MCT works best for extracting volatile compounds from tobacco-containing materials when the ratio of MCT to tobacco material (dry basis) is 1:3 to 1:5. In these samples, not only are the attendant tastes and odors normally present in lipid-containing samples (eg waxes) no longer felt, but they also provide the consumer with the strongest tobacco aroma and flavor and also provide the most nicotine. transmission has been confirmed.

The diffusivity of volatile compounds such as aerosol formers and nicotine is greater in the liquid phase than in the solid phase. Thus, the liquid medium chain triglycerides will act to promote the transfer of volatile compounds in the particulate tobacco material to the surface. As such, the delivery of these volatile compounds from the granulated tobacco material to the aerosol can be improved over homogenized tobacco material that does not contain liquid medium chain triglyceride oil within certain claimed proportions. Interestingly, we found that if the ratio of MCT to tobacco material (dry basis) was outside the claimed ranges of 1:3 and 1:5, the sample could immediately be recognized as a less preferred choice. This is particularly evident for samples with a ratio of MCT to tobacco material contained (dry basis) less than or equal to 1:10, and these less favorable samples are immediately recognizable. In conclusion, therefore, in order for volatile compounds to be optimally extracted and released as aerosols, a certain minimum threshold of MCT to tobacco material is required, which enables the formation of good mixtures of open-pore foams and closed-pore foams.

The medium chain triglyceride oil is preferably evenly distributed throughout the tobacco-containing material, meaning that at room temperature there are no areas where oil and plant material are individually distinguished. Rather, the oil and particles are completely homogenized or granulated.

The use of homogenised tobacco material incorporating medium chain triglyceride oil as described herein may enable equivalent nicotine or aerosol yields at lower heating temperatures compared to the use of homogenised tobacco material without medium chain triglyceride oil as defined. there is. Indeed, the use of particulate tobacco-containing material with medium chain triglycerides in certain proportions as defined herein will provide a higher nicotine or aerosol yield at lower heating temperatures than would be provided by the same material at higher heating temperatures. It was surprisingly found that The potential use of lower heating temperatures can provide a number of advantages, as the compositions of the present invention are meant to be used in, for example, aerosol-generating devices, such as heated devices. For example, a lower operating temperature allows the aerosol-generating device to last longer without the need to recharge the battery. As a further example, lower operating temperatures may allow the use of smaller batteries. As a further example, lower operating temperatures may reduce the release of undesirable aerosol components from the homogenised tobacco material.

Example 1

An aerosol-generating tobacco-containing composition according to the invention was prepared from tobacco material mixed with MCT oil. The resulting composition forms an aerosol-generating material, which in this example is provided in powder form, each having a different percentage/ratio of the composition, and tested using the methods described herein.

The MCT oil used in Powders B, C, D, and E was Richmix 5025 IP (175755) obtained from Sensory Effects®, a subsidiary of Balchem Company. For each tobacco sample, powder/particulate tobacco was formed into the aerosol-generating substrate using conventional techniques. An aerosol-generating article comprising powders B, C, D, and E is provided according to the present invention comprising a medium chain triglyceride oil in a tobacco-containing material. The aerosol-generating article comprising Powder A, without medium chain triglyceride oil, is a control sample for comparison purposes.

An example of a cellulosic fiber may be, for example, Cekol® 2000, while guar may be, for example, gellan gum food grade.

Each aerosol-generating article was subjected to a heating test as defined above at both 360°C and 280°C. The level of nicotine in the aerosol delivered from each aerosol-generating article was measured, and the results are shown in Table 2 below.

Nicotine levels were measured using the ISO method used to measure the tar, nicotine, and carbon monoxide (TNCO) content in cigarettes, using a smoker that smokes cigarettes according to the conventional method. In the EU, this method is widely known as the ISO method as defined by the European Commission. It is noted herein that other methods, such as the Canadian Intense method, may also be used for determination.

As can be seen in Table 2, an increase in nicotine delivery from the aerosol-generating tobacco-containing composition was observed in both aerosol-generating articles comprising medium chain triglycerides in the tobacco-containing material compared to the comparative sample (Powder A). Nevertheless, only the samples of powders C and D show the most significant improvement in nicotine delivery. This demonstrates that volatile compounds can be efficiently released when the optimal ratio of MCT to tobacco-containing material is selected. Of these ratios, a ratio of 1:3 is the most promising candidate as it shows an increase in nicotine delivery of 78% and 87%, respectively, compared to the control sample (Powder A) when heated at 360°C and 280°C. Surprisingly, it was observed that the lower heating temperature (eg, 280°C) promotes the aerosol release of higher amounts of nicotine compared to a sample in which the aerosol-generating substrate (tobacco-containing composition) is heated at 360°C.

Example 2

The same experiment was repeated with the aerosol-generating tobacco-containing composition of the present invention, wherein the aerosol-generating tobacco-containing composition is provided in the form of a foam or mousse. Except for the use of MCT in the present invention and the use of a ratio of MCT to tobacco-containing material, the foam properties and their preparation are known in the art, for example as described in patent document WO 2018/122375 A1. .

All other parameters were similar to those described in Example 1, except for the fact that the aerosol-generating tobacco-containing composition was provided in the form of a foam.

Each aerosol-generating article was subjected to a heating test as defined above at both 360°C and 280°C. The level of nicotine in the aerosol delivered from each aerosol-generating article was measured, and the results are shown in Table 3 below.

As can be seen in Table 4, when the aerosol-generating tobacco-containing composition is provided in the form of a foam or mousse, it is observed that the nicotine delivery efficiency is significantly improved compared to Example 1. That is, when a higher release rate of a volatile compound such as nicotine is desired, an aerosol-generating substrate in foam form would be a preferred option over aerosol-generating substrate in powder form.

Similar to Example 1, it was found that a lower heating temperature, ie, 280° C., was more efficient at releasing volatile compounds compared to heating the aerosol-generating material of the present invention at a higher temperature of 360° C. In addition, the MCT to tobacco-containing material of 1:3 had the highest nicotine delivery, followed by the ratio of 1:5.

These results show that the use of an aerosol-generating tobacco-containing material incorporating a medium chain triglyceride oil provides increased nicotine or aerosol yield compared to a homogenised tobacco material having the same amount of tobacco but without the medium chain triglyceride oil as defined. showed that This effect is more pronounced when the ratio of MCT to tobacco-containing material (dry basis) is 1:3 to 1:5.

Claims (12)

An aerosol-generating tobacco-containing composition provided in foam or mousse form, comprising particulate tobacco material and a lipid, wherein the lipid is a medium chain triglyceride, wherein the ratio of medium chain triglyceride to tobacco-containing material (by dry weight) is from 1:3 to 1:5, composition. The composition according to claim 1 , wherein the particulate tobacco material has a particle size of less than 100 μm, preferably less than 90 μm, 80 μm, 70 μm, 60 μm, or less than 50 μm, more preferably 40 μm to 90 μm. . 3. The composition of claim 1 or 2, wherein the ratio of medium chain triglycerides to tobacco-containing material (by dry weight) is 1:3. 4. The composition of any one of claims 1 to 3, wherein the lipid is derived from palm kernel oil or coconut oil. 5. The composition of any one of claims 1 to 4, wherein the lipid consists of caprylic acid (C8:0), capric acid (C10:0), and/or lauric acid (C12:0). 6. The method according to any one of claims 1 to 5, wherein more than 50 wt%, preferably more than 60 wt% or 66 wt% of the lipid, based on the total weight of the lipid, is MCT caprylic acid (C8:0) , composition. 7. The composition of any one of claims 1-6, further comprising maltodextrin gum acacia, silicon dioxide, and/or sunflower lecithin. 8. The composition of any one of claims 1-7, comprising any of a propellant, an aerosol former, a foam stabilizer, and/or a foam former. 9 . The composition according to claim 1 , comprising the aerosol former in a proportion of 10-80 wt %, preferably 30-70 wt % of the weight of the aerosol-generating material. A method for preparing an aerosol-generating tobacco-containing foam or mousse, comprising:
a. mixing an aerosol former, a foam former, and optionally a solvent under heating;
b. aeration of the mixture with gas or air for at least 5 minutes at room temperature;
c. adding a tobacco-containing component and/or an inhalable agent to the mixture;
d. aeration of said mixture optionally with gas or air;
e. adding medium chain triglycerides to the mixture, wherein the ratio of medium chain triglycerides to tobacco-containing material (by dry weight) is from 1:3 to 1:5;
f. aeration of the mixture with gas or air for at least 5 minutes at room temperature;
g. A method comprising adding a foam stabilizer. 11. The method of claim 10, wherein the mixture is aerated in each step using heated gas or air at a temperature between 35°C and 50°C for a minimum of 10 minutes. 10. An aerosol-generating article comprising the aerosol-generating tobacco-containing composition according to any one of claims 1 to 9.