BR112020009242A2 - aerosol generating substrate comprising an oil additive - Google Patents

Abstract

The present invention relates to a heated aerosol generating article (10) comprising: a column of aerosol generating substrate (20), wherein the column of the aerosol generating substrate (20) is formed by one or more sheets of a homogenized tobacco selected from reconstituted tobacco leaf and coated leaf, the homogenized tobacco material comprising at least 1 weight percent of a medium chain triglyceride oil, on a dry weight basis. Medium chain triglyceride oil has a melting point below 18 degrees Celsius and comprises one or more triglycerides with at least two fatty acid chains with a chain length between 6 and 12 carbon atoms.

Description

Descriptive report of the invention patent for “AEROSOL GENERATING SUBTRACT UNDERSTANDING AN OIL ADDITIVE”.

[0001] The present invention relates to a heated aerosol generating article and a plant material for use in this article. In particular, the invention relates to a homogenized tobacco material that is suitable for use in a heated aerosol generating article, such as, for example, a "heating without burning" smoking article.

[0002] Aerosol generating articles in which an aerosol generating substrate, such as a tobacco containing substrate, is heated instead of subjected to combustion, are known in the art. Typically, in such heated smoking articles, an aerosol is generated by transferring heat from a heat source to a physically separate aerosol-generating material or substrate, which may be in contact with, located in, around or downstream of the heat source. During the use of the aerosol-generating article, volatile compounds are released from the aerosol-generating substrate by means of heat transfer from the heat source and are drawn along with the air swallowed through the aerosol-generating article. As the | released compounds cool, they condense to form an aerosol.

[0003] A series of prior art documents describe aerosol generating devices for consuming or smoking heated aerosol generating articles. Such devices include, for example, electrically heated aerosol generating devices in which an aerosol! it is generated by the heat transfer of one or more electric heating elements from the aerosol generating device to the aerosol generating substrate of a heated aerosol generating article. An advantage of such electrically heated aerosol generating devices is that they significantly reduce secondary flow smoke.

[0004] Homogenized tobacco material is often used in the production of tobacco products, including substrates for aerosol-generating articles. Such homogenized tobacco material is normally manufactured from parts of the tobacco plant that are less suitable for producing cut tobacco filler, for example, tobacco stems or tobacco powder.

[0005] The most commonly used forms of homogenized tobacco material are reconstituted tobacco leaf and coated leaf. The process for forming sheets of homogenized tobacco material normally comprises a step in which tobacco powder and a binder are mixed to form a paste. The slurry is then used to create a tobacco web. For example, a tobacco web may be formed by molding a viscous slurry onto a moving metal belt to produce the so-called coated sheet. Alternatively, a low viscosity, high water content slurry can be used to create reconstituted tobacco in a process that resembles papermaking.

[0006] The term "coated sheet" can be used, particularly, to denote a form of homogenized tobacco material formed by a process based on molding a slurry comprising tobacco particles (alone or in a mixture with other particles vegetables) and a binder (such as guar gum) on a support surface, such as a conveyor belt, drying the slurry and removing the dry leaf from the support surface. An example of the molding process or the coated sheet process is described in, for example, US-A-5,724,998 for the manufacture of coated sheet tobacco. In a coated sheet process, individualized plant materials are produced by spraying, grinding or grinding parts of the plant. Particles produced from one or more plants are mixed with a liquid component, typically water, to form a paste. Other components of the pulp may include additional fibers, a binder and an aerosol former. Particularized plant materials can be agglomerated in the presence of the binder. The paste is molded on a support surface and then dried on a sheet of homogenized tobacco material.

[0007] Tobacco particles can be in the form of a tobacco powder with particles having an average diameter in the order of 30 to 80 micrometers or 100 to 250 micrometers, depending on the desired sheet thickness and mold gap. Additional fibers may include particles of stem material and tobacco stalks or other tobacco plant material and other cellulose-based fibers, such as wood fibers with a low lignin content. The type and size of the fiber particles can be selected in order to adjust the tensile strength of the coated sheet. Alternative fibers, such as vegetable fibers including hemp and bamboo, can be used with the fibers mentioned above or as an alternative to the fibers mentioned above.

[0008] A suitable process for forming a reconstituted tobacco leaf is the so-called paper-making process. In a first step of this process, a tobacco material (alone or in a mixture with other plant material) is mixed with water to form a diluted suspension composed mainly of separate cellulose fibers. This first step may involve immersion and application of heat. The suspension has a lower viscosity and a higher water content than the paste produced in the molding process. The suspension can then be separated into an insoluble portion containing solid fibrous components and a liquid or aqueous portion that comprises soluble tobacco substances. The remaining water in the insoluble fibrous portion can be drained through a screen, acting as a sieve, so that a randomly woven fiber web can be established. Water can also be removed from this web by pressing with rollers, sometimes aided by suction or vacuum. When most of the moisture has been removed, a sheet of tobacco fibers that is generally smooth and uniform is reached. The soluble tobacco substances that have been removed from the sheet can be concentrated and the concentrated tobacco substances can be added back to the sheet, resulting in a sheet of homogenized tobacco material. This process, as described in US 3,860,012, has been used with tobacco to manufacture reconstituted tobacco products, also known as tobacco paper.

[0009] Other known processes that can be applied to the production of sheets of homogenized tobacco material are mass reconstitution processes of the type described, for example, in US-A-3,894,544; and extrusion processes of the type described in, for example, GB-A-983,928. Typically, the densities of homogenized tobacco materials produced by extrusion processes and mass reconstitution processes are greater than the densities of homogenized tobacco materials produced by molding processes.

[0010] In a heated aerosol-generating article, an aerosol-generating substrate is heated to a relatively low temperature, for example, about 350 degrees Celsius, to form an inhalable aerosol. In order for an aerosol to be formed, the homogenized tobacco material preferably comprises high proportions of aerosol builders and humectants such as glycerin or propylene glycol. The homogenized tobacco material also contains nicotine. Columns formed from homogenized tobacco material that are suitable for use as aerosol-generating substrates in aerosol-generating articles | heated are described in WO-A-2012/164009.

[0011] To create an aerosol, aerosol builders must be released from the homogenized tobacco material. To be released, these aerosol builders must migrate from inside the body of the homogenized tobacco material to the surfaces of the homogenized tobacco material. Other volatile compounds, such as nicotine, must also migrate from inside the body of the homogenized tobacco material to be embedded in the aerosol. It may be desirable to improve efficiency and the rate at which aerosol builders are released from a homogenized tobacco material during heating.

[0012] The migration of aerosol builders and other volatile compounds from within a homogenized tobacco material is limited by diffusion. One way to improve efficiency and the rate at which aerosol builders are released may be to increase the temperature at which the homogenized tobacco material is heated, thereby improving diffusion. This can be undesirable, however, as an increase in temperature can result in the emission of undesirable compounds. An increase in temperature can also negatively affect the physical properties of the aerosol that is formed, for example, the temperature of the aerosol or the size of the aerosol droplets.

[0013] Another way to improve efficiency and the rate at which aerosol builders and other volatile compounds are released by heating can be to increase the amount of surface area per unit volume of the homogenized tobacco material. This may require the use of thin sheets of homogenized tobacco material. However, the homogenized tobacco material lacks resistance due to a high concentration of aerosol builders. The thin sheets of homogenized tobacco material are extremely difficult to handle and process.

[0014] It would be desirable to provide homogeneous plant material

used for an aerosol-generating article that provides a better distribution of volatile compounds, such as nicotine. It would be particularly desirable to provide a homogenized plant material that provides a better distribution of volatile compounds even at lower operating temperatures. It would also be desirable to provide a homogenized plant material that can be manufactured efficiently, without the need to significantly modify existing manufacturing processes and devices.

[0015] According to a first aspect of the invention, an aerosol generating article is provided | heated for the production of an inhalable aerosol, the heated aerosol generating article comprising an aerosol generating substrate column, wherein the column of the aerosol generating substrate is formed by one or more sheets of a homogenized tobacco material selected from the re-constituted tobacco leaf and coated leaf, the homogenized tobacco material comprising at least 1 weight percent of medium chain triglyceride oil, on a dry weight basis. Medium chain triglyceride oil has a melting point below 18 degrees Celsius and comprises one or more triglycerides with at least two fatty acid chains with a chain length between 6 and 12 carbon atoms.

[0016] In accordance with a second aspect of the invention, a homogenized tobacco material is provided for use as an aerosol-generating substrate in a heated aerosol-generating article according to the first aspect of the invention, the human tobacco material homogenized product comprising at least 1 weight percent of a medium chain triglyceride oil, on a dry weight basis. Medium chain triglyceride oil has a melting point below 18 degrees Celsius and comprises one or more triglycerides with at least

in the two fatty acid chains with a chain length between 6 and 12 carbon atoms.

[0017] According to a third aspect of the invention, an aerosol generating system is provided which comprises: an aerosol generating device comprising a heating element; and an aerosol generating article for use with the aerosol generating device, the aerosol generating article comprising an aerosol generating substrate column, in which the column of the aerosol generating substrate is formed by one or more leaves of a homogenized tobacco material selected from reconstituted tobacco leaf and coated foil, the homogenized tobacco material comprising at least 1 weight percent of a medium chain triglyceride, on a dry weight basis. Medium chain triglyceride oil has a melting point below 18 degrees Celsius and comprises one or more triglycerides with at least two fatty acid chains with a chain length between 6 and 12 carbon atoms.

[0018] In accordance with a fourth aspect of the invention, there is provided a method of making a homogenized plant material according to the second aspect of the invention, the method comprising the steps of: forming a paste comprising a tobacco material, water and a medium chain triglyceride oil with a melting point below 18 degrees Celsius, comprising one or more triglycerides with at least two fatty acid chains with a chain length between 6 and 12 carbon acts; homogenization of the paste; and molding and drying the paste to form the homogenized tobacco material. The method is carried out without any external heating of the paste.

[0019] Any references below to the characteristics or preferential aspects of the column of the aerosol generating substrate of aerosol generating articles | according to the invention should be considered applicable to all aspects of the present invention.

[0020] As used in this document, the term "heated aerosol-generating article" refers to an aerosol-generating article for producing an aerosol comprising an aerosol-generating substrate that is intended to be heated instead to undergo combustion in order to release volatile compounds that can form an aerosol.

[0021] As used in this document, the term "aerosol-generating substrate" refers to a substrate capable of releasing, upon heating, volatile compounds from which they can form an aerosol. The aerosol generated from the aerosol-forming substrates in aerosol-generating articles described in this document may be visible or invisible and may include vapors (for example, fine particles of substances that are in a gaseous state, which are normally liquid or solids at room temperature), as well as gases and liquid droplets of condensed vapors.

[0022] As used in this document, the term "column" is used to denote a generally cylindrical element of substantially cross-section and preferably circular, oval or elliptical. As used in this document, the term "sheet" is used to refer to a laminar element with a length and width substantially greater than its thickness.

[0023] As used herein, the term "homogenized tobacco material" encompasses any tobacco material formed by the agglomeration of particles of tobacco material, together with or in a mixture with other plant material. For example, sheets or wefts of homogenized tobacco material are formed by agglomerating particularized tobacco material obtained by grinding or any other form of crushing one or more of the tobacco leaf and leaf stalks. tobacco. In addition, the homogenized tobacco material can comprise a smaller amount of one or more of tobacco powder, tobacco residues and other particulate tobacco by-products formed during, for example, the treatment, handling and shipping of tobacco .

[0024] The homogenized tobacco material can be produced by molding, extrusion, papermaking processes or other suitable processes known in the art, as described above.

[0025] As used in this document, the term "medium chain triglyceride oil" is used to define an oil comprising one or more triglycerides, each triglyceride having two or three fatty acid chains with a chain length between 6 and 12 carbon atoms. The fatty acid chains can therefore include one or more of caproic acid (C6), caprylic acid (C8), capric acid (C10) and lauric acid (C12). These can be present in medium chain triglyceride oil in any combination and in any relative quantity, provided that the necessary properties of medium chain triglyceride oil are obtained. For each triglyceride within the Oil of the medium triglyceride chain, the three fatty acid chains can be the same length or different, as long as at least two of the fatty acid chains have a chain length between 6 and 12 carbon atoms. For each triglyceride, the three fatty acid chains can be identical or two or more of the fatty acid chains can be different from each other. Triglycerides can be individually saturated or unsaturated.

[0026] Certain natural oils, such as coconut oil and palm oil, contain suitable medium chain triglycerides and the medium chain triglyceride oil used in the present invention can, in some cases, be a fraction of an oil Natural.

[0027] Any reference to a medium chain triglyceride oil in relation to the homogenized plant material of any of the aspects of the present invention should be considered a reference to a medium chain triglyceride with the melting point and chain length fatty acids as defined above, unless otherwise noted.

[0028] As used in this document, the term "melting point" refers to the light point or complete melting point of medium chain triglyceride oil. This corresponds to the temperature, in degrees Celsius, at which the oil is completely liquid and completely clear, with no remaining solid particles. Many methods known in the art can be used to measure the melting point of an oil, for example, the capillary technique or the Stuart SMP50 melting point apparatus.

[0029] As described above, the aerosol generating article of the present invention incorporates an aerosol generating substrate! formed by one or more sheets of a homogenized tobacco material selected from reconstituted tobacco leaf and casting sheet, the homogenized tobacco material comprising an oil additive in the form of a medium chain triglyceride oil with a melting point below 18 degrees Celsius. The melting point of medium chain triglyceride oil is such that the oil is always in a completely liquid form at room temperature (approximately 22 degrees Celsius). The homogenized tobacco material therefore includes the oil in a liquid form dispersed within a solid matrix of the tobacco material.

[0030] The diffusivity of volatile components, such as aerosol and nicotine builders, is greater in a liquid phase than in a solid phase. The liquid medium chain triglyceride oil will thus act to facilitate the transfer of volatile components within the homogenized tobacco material to its surface. Therefore, the transfer of these volatile components from the homogenized tobacco material to an aerosol can be increased compared to a homogenized tobacco material that does not contain liquid medium chain triglyceride oil. The medium chain triglyceride oil is preferably evenly distributed throughout the homogenized tobacco material, which means that, at room temperature, there are no separately distinguishable regions of oil and plant material. Instead, the lipid and tobacco particles are fully homogenized.

[0031] The homogenized tobacco material is one of the most expensive elements of a heated aerosol generating article. The use of a tobacco material homogenized with a medium chain triglyceride oil incorporated into it, as described in this document, can allow less tobacco to be used, providing an equivalent yield of nicotine or aerosol compared to the use of a homogenized tobacco material without a medium chain triglyceride oil as defined. This can provide cost savings and, at the same time, provide the consumer with an equivalent experience.

[0032] The use of a tobacco material homogenized with a medium chain triglyceride oil incorporated in it can also provide an increase in the yield of nicotine or aerosol compared to a homogenized tobacco material with the same amount tobacco, but without a medium chain triglyceride oil as defined.

[0033] The use of a tobacco material homogenized with a medium chain triglyceride oil incorporated into it, as described in this document, may allow equivalent yields of nicotine or aerosol at a lower temperature compared to the use of a tobacco material homogenized without a medium chain triglyceride oil as defined. In fact, it has been surprisingly found that the use of a tobacco material homogenized with a medium chain triglyceride as defined in this document can provide a higher nicotine or aerosol yield at a lower temperature than supplied by the same material at a higher temperature.

[0034] The potential use of a lower operating temperature can provide a number of benefits. For example, a lower operating temperature may allow longer periods of use without the need to recharge the battery. As another example, a lower operating temperature may allow the use of a smaller battery. As another example, a lower operating temperature can reduce the release of aerosol constituents! undesirable effects of homogenized tobacco material.

[0035] It has also been found that improvements in the distribution of nicotine and aerosol can be provided with a relatively low proportion of medium chain triglyceride oil in homogenized tobacco material, as described in more detail below. Medium chain triglyceride oil can therefore be incorporated into homogenized tobacco material without significantly impacting the quantities of other components, such as tobacco and aerosol builder, within the homogenized tobacco material.

[0036] The use of a medium chain triglyceride oil with a melting point below 18 degrees Celsius, so that the oil is liquid at room temperature, also provides advantages in the manufacture of the homogenized tobacco material. Particularly, the incorporation of medium chain triglyceride oil into the homogenized tobacco material is facilitated, since the oil does not need to be heated to melt it and the paste from which the homogenized tobacco material is formed it does not need to be heated to retain the oil in liquid form. The manufacturing process can therefore be carried out without the need for external heating. This minimizes the energy costs of the manufacturing process and also facilitates the implementation and control process. In addition, the absence of any external heating during the manufacturing process of the homogenized tobacco material ensures that the loss of volatile components of the tobacco material can be minimized.

[0037] It has also been found that the use of a medium chain triglyceride reduces the viscosity of the homogenized tobacco material. Typically, sheets of homogenized tobacco material can become relatively viscous. This is a potentially major problem in relation to the storage of homogenized tobacco material, since the viscosity makes it difficult to handle the material. Particularly, after storing the homogenized tobacco material rolled on bobbins, the viscosity of the material makes it difficult to unwind the bobbins, since the material will tend to adhere to itself and to the bobbins. This potentially damages the leaves of homogenized tobacco material and also means that a significant proportion of the leaves cannot be used and can be discarded as waste. The problem typically worsens as the storage period is increased.

[0038] In contrast, it was surprisingly found that when a medium chain triglyceride oil as defined in this document is included in the homogenized tobacco material, the viscosity is considerably reduced, making leaf handling easier and simpler. . The proportion of the material that is wasted has therefore been significantly less where a medium chain triglyceride oil is incorporated, as in the present invention.

[0039] The medium chain triglyceride oil included in the aerosol-generating substrate of the aerosol-generating articles according to the present invention preferably has an iodine value of less than about 20, more preferably less than about 15, more preferably preferably less than about 10, more preferably less than about 5 and more preferably less than about

two.

[0040] As used in this document, the term "iodine value" characterizes the degree of saturation in medium chain triglyceride oil. The iodine value, also known as iodine number or iodine index, corresponds to the mass of iodine in grams that is consumed per 100 grams of medium chain triglyceride oil, measured according to any iodometric techniques known in the art, such as tra - treatment with Wijs solution, reaction with potassium chloride followed by titration with sodium thiosulfate. See, for example, Firestone D (May-Jun 1994) "Determination of the iodine value of oils and fats: summary of collaborative study". J AOAC Int. 77 (3): 674—6. The lower the number of iodine, the lower the carbon double bond present in medium chain triglyceride oil and, therefore, the greater the degree of saturation.

[0041] The low iodine value of medium chain triglyceride oil in preferred embodiments of the present invention indicates that the oil has a very high degree of saturation. Preferably, the medium chain triglyceride oil is substantially saturated. The use of a medium chain triglyceride oil with a very high degree of saturation advantageously minimizes the flavors that are generated when the oil is heated during the use of the aerosol generating article. The presence of medium chain triglyceride oil within the aerosol-generating substrate, therefore, does not have an adverse effect on the flavor of the aerosol distributed to the consumer from the substrate. On the other hand, oils with a lower degree of saturation and, therefore, more unsaturated, with a higher degree of double carbon bonds, usually generate, upon heating, flavors that would be unacceptable to the consumer.

[0042] Aerosol generating articles according to the present invention are suitable for use in an aerosol generating system comprising an electrically heated aerosol generating device with an internal heating element to heat the aerosol generating substrate. For example, aerosol generating articles according to the invention find a particular application in aerosol generating systems that comprise an electrically heated aerosol generating device with an internal heating blade that is adapted to be inserted in the column of the generating substrate. of aerosol. Aerosol-generating articles of this type are described in the state of the art, for example, in European patent application EP-A-O 822 670.

[0043] As used herein, the term "aerosol generating device" refers to a device comprising a heating element that interacts with the aerosol generating substrate of the aerosol generating article to generate an aerosol.

[0044] Alternatively, the aerosol generating article according to the invention may comprise a source of combustible carbon heat to heat the aerosol generating substrate during use. Aerosol generating articles of this type are described in the state of the art, for example, in the international patent application WO-A- 2009/022232.

[0045] As described above, the aerosol generating articles of the present invention include an aerosol generating substrate comprising a homogenized plant material that has been modified to incorporate a medium chain triglyceride oil with specific properties. The medium chain triglyceride has a melting point below about 18 degrees Celsius, preferably below about 17 degrees Celsius, more preferably below about 16 degrees Celsius, more preferably below about 15 degrees Celsius, more preferably below 14 degrees Celsius, more preferably below 13 degrees Celsius, more preferably below about 12 degrees, more preferably below about 11 degrees Celsius and most preferably below about 10 degrees Celsius. In certain embodiments, medium chain triglyceride oil may have a melting point below 5 degrees Celsius. In other modes, medium chain triglyceride oil may have a melting point below 0 degrees Celsius. In all modalities, medium chain triglyceride oil is, therefore, liquid at room temperature, which provides the advantages discussed in detail above.

[0046] Medium chain triglyceride oil comprises one or more medium chain triglycerides that have been selected to achieve the desired melting point, as defined above. One or more medium-chain triglycerides have at least two fatty acid chains with a chain length between 6 and 12 carbon atoms, more preferably between 6 and 10 carbon atoms and more preferably between 8 and 10 carbon atoms. Preferably, one or more triglycerides have all three chains with a chain length between 6 and 12 carbon atoms, more preferably between 6 and 10 carbon atoms and more preferably between 8 and 10 carbon atoms.

[0047] Preferably, medium chain triglyceride oil comprises at least 80 weight percent triglycerides with at least two fatty acid chains with a chain length between 8 and 10 carbon atoms. More preferably, the medium chain triglyceride oil comprises at least 90 weight percent triglycerides with at least two fatty acid chains having a chain length between 8 and 10 carbon atoms. Preferably, the medium chain triglyceride oil comprises approximately 100 weight percent triglycerides with at least two fatty acid chains with a chain length between 8 and 10 carbon atoms.

[0048] Preferably, in medium chain triglyceride oil, the ratio of fatty acid chains with a chain length of 8 (C8) to fatty acid chains with a chain length of 10 carbon atoms (C10) it's around 1: 1. Where medium chain triglyceride oil additionally includes fatty acid chains with a chain length of 12 carbon atoms (C12), the ratio of C8: C10: C12 is between about 1: 1: 6 and about 1: 1:16.

[0049] Medium chain triglyceride oils suitable for use in the present invention are commercially available. For example, a suitable medium chain triglyceride oil is Grindsted & MCT 60 X from Danisco. Grindsted & MCT 60 X corresponds to the glyceryl tricaprilat / cap, made of caprylic / capric acid derived from the palm and natural vegetable glycerin. It has a melting point significantly below 18 degrees and an iodine value of less than 0.5. Grindsed & The MCT 60 X has a C8: 010: 012 ratio of approximately 1: 1: 16.

[0050] The total content of medium chain triglyceride oil in homogenized tobacco material is at least about 1 weight percent, preferably about 2 weight percent, based on dry weight. Alternatively or additionally, the total content of the medium chain triglyceride oil in the homogenized tobacco material is preferably less than about 10 weight percent, more preferably less than about 5 weight percent, based on dry weight . For example, the total content of medium chain triglyceride oil in the homogenized tobacco material can be between about 1 weight percent and about 10 weight percent, more preferably between about 1 percent and about 5 percent by weight, based on dry weight.

[0051] The total content of medium chain triglyceride oil within a homogenized tobacco material can be quantified using a test method in which the homogenized tobacco material is first ground, then extracted in a liquid solvent and analyzed using a liquid chromatography - mass spectrometry (LC-MS) technique to determine the nature of the triglycerides present in the extract. A detailed example of such a test method is provided in the example below.

[0052] The tobacco material homogenized according to any aspect of the invention preferably comprises one or more aerosol builders. Functionally, an aerosol former is a component that can be volatilized and that carries nicotine and / or flavoring in an aerosol when the homogenized tobacco material is heated above the specific volatilization temperature of the aerosol former. An aerosol former can be any compound or mixture of suitable known compounds which, when in use, facilitate the formation of a dense and stable aerosol and which is substantially resistant to thermal degradation at the operating temperature of the heated aerosol generating article . Different aerosol makers vaporize at different temperatures. Therefore, an aerosol builder can be chosen based on its ability to remain stable at or close to room temperature, but vaporize at a higher temperature, for example, between 40-450 degrees Celsius.

[0053] The aerosol former may also have humectant-like properties that help maintain a desirable level of moisture in the homogenized tobacco material. In particular, some aerosol builders are hygroscopic materials that function as a wetting agent.

[0054] Aerosol builders suitable for inclusion in homogenized plant material such as homogenized tobacco material are known in the art and include, but are not limited to: monohydric alcohols such as menthol, polyhydric alcohols such as triethyl - noglycol, 1,3-butanediol and glycerin, esters of polyhydric alcohols such as glycerol mono, di or triacetate and aliphatic esters of mono, di or polycarboxylic acids, such as dimethyl dodecanodiate, dimethyl tetra-canodioate, erythritol, 1 , 3-butylene glycol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, meoseritritol, a mixture of diacetin, a diethyl suberate, triethyl citrate, benzyl benzoate, benzyl acetate, vanyl acetate ethyl, tributyrin, lauryl acetate, lauric acid, myristic acid and propylene glycol.

[0055] For homogenized tobacco materials intended for use in the aerosol generating system electrically operated with a heating element, as described in more detail below, the aerosol former may preferably be glycerol (also known as glycerin or glycerin ) or propylene glycol.

[0056] The total content of aerosol former in the homogenized tobacco material is preferably between about 5 weight percent and about 30 weight percent on a dry weight basis and more preferably between about 5 percent and about 20 percent by weight on a dry weight basis.

[0057] The homogenized tobacco material preferably comprises at least about 70 percent by weight of tobacco material, more preferably between about 70 percent and about 80 percent by weight of the tobacco material on a basis of dry weight. The tobacco material is preferably in the form of a ground tobacco powder. For example, the tobacco material can be ground to form a powder with a specified particle size. Thus, the

homogenized tobacco material can contain tobacco powder with an average particle size of powder between about 0.03 mm and about 0.12 mm, for example, between 0.05 mm and about 0.10 mm.

[0058] The homogenized tobacco material preferably comprises tobacco material, in the form of ground tobacco powder. As used in this document with reference to the invention, the term "tobacco material" describes any material that includes tobacco, including, but not limited to, tobacco leaf, tobacco stem, tobacco stalk, tobacco powder, expanded tobacco, tobacco material reconstituted tobacco and homogenized tobacco material. Alternatively or in addition, the homogenized tobacco material can include non-tobacco plant material, such as tea or an herb, such as peppermint.

[0059] The tobacco material homogenized according to any aspect may contain one or more binders. Preferably, the total content of the binder in the homogenized tobacco material is between about 1 percent and about 5 weight percent on a dry weight basis. In the case of homogenized tobacco, there is a practical limit to the amount of binders that can be present in the tobacco paste and, therefore, in the homogenized tobacco material formed by molding the paste. This is due to the tendency of the binders to gel when in contact with water. Gelling strongly influences the viscosity of the tobacco pulp, which in turn is an important parameter of the pulp for subsequent woven fabrication processes, such as molding. Therefore, it is preferable to have a relatively low amount of binder in the homogenized tobacco material.

[0060] The binder can help ensure that tobacco, for example, tobacco powder, remains substantially dispersed throughout the homogenized tobacco material.

[0061] Although any binder can be used, preferred binders are natural pectins, such as fruit, citrus or tobacco pectins; guar gums, such as hydroxyethyl guar and hydroxypropyl guar; locust bean gums, such as hydroxyethyl and hydroxypropyl locust bean gum; alginate; starches, such as modified starches or derivatives; celluloses, such as methyl, ethyl, ethylhydroxymethyl and carboxymethylcellulose; tamarind gum; dextran; pullulan; Kkonjac flour; xanthan gum and the like. A particularly preferred binder is guar.

[0062] In certain cases, a homogenized tobacco material that makes up the components described above may not have the necessary resistance for handling and processing to form an aerosol-generating substrate for a heated aerosol-generating article. This can happen, particularly, when the homogenized tobacco material contains a high proportion of aerosol former or where the tobacco is in the form of a finely ground powder. To achieve better strength, the homogenized tobacco material can contain one or more additional components, such as a binder and a reinforcement.

[0063] The tobacco material homogenized according to any aspect of the present invention can include even more reinforcing fibers. Reinforcement fibers can have an average fiber length between 0.2 mm and 4.0 mm. The reinforcement fibers can be cellulose fibers. In some embodiments, the homogenized tobacco material may contain between 1 percent by weight and 15 percent by weight of reinforcement fibers on a dry weight basis, for example, between 1.5 percent by weight and 10 percent by weight. weight of reinforcement fibers on a dry weight basis.

[0064] The inclusion of fibers, such as cellulose fibers, in the homogenized tobacco material increases the tensile strength of the material. Therefore, adding reinforcement fibers can increase the resilience of a blend of homogenized tobacco material. This supports a regular manufacturing process and subsequent handling of the homogenized tobacco material during the manufacture of aerosol-generating articles. This in turn can lead to an increase in production efficiency, cost efficiency, reproducibility and production speed in the manufacture of aerosol-generating articles and other smoking articles.

[0065] Cellulose fibers for inclusion in a homogenized tobacco material are known in the art and include, but are not limited to: softwood fibers, hardwood fibers, jute fibers, linen fibers, tobacco fibers and their combinations. In addition to pulping, the cellulose fibers added can be subjected to suitable processes, such as refining, mechanical pulping, chemical pulping, whitening, sulfate pulping and a combination of these.

[0066] Fiber particles may include tobacco stem materials, stems or other tobacco plant material. Preferably, cellulose-based fibers, such as wood fibers, have a low lignin content. Alternative fibers, such as vegetable fibers, can be used with the fibers mentioned above or, alternatively, including hemp and bamboo.

[0067] A relevant factor to be considered for reinforcement fibers is the length of the fiber. When the fibers are very short, the fibers do not contribute effectively to the tensile strength of the resulting homogenized tobacco material. When the fibers are very long, they can affect the homogeneity of the homogenized tobacco material. The size of the fibers in a homogenized tobacco material comprising tobacco powder with an average size between about 0.03 mm and about 0.12 mm and an amount of binder between about 1 percent and about 3 percent dry weight of the paste, is advantageously between about 0.2 millimeters and about

4 mm. Preferably, the average fiber size is between about 1 millimeter and about 3 millimeters. Preferably, this additional reduction is achieved through a refinement step.

[0068] In this specification, the "size" of the fiber means the length of the fiber, that is, the length of the fiber in the dominant dimension of the fiber. Furthermore, preferably, according to the invention, the amount of the fibers is comprised between about 1 percent and about 3 percent dry weight of the total weight of the homogenized tobacco material. In the case of a homogenized tobacco material, fibers with an average size between about 0.2 millimeters and about 4 millimeters do not significantly inhibit the release of substances from the fine ground tobacco powder when the homogenized tobacco material is used as an aerosol generating substrate | of an aerosol-generating article. Reinforcement fibers can be introduced into a tobacco paste and, consequently, into the homogenized tobacco material, such as loose fibers.

[0069] The homogenized tobacco material, according to any aspect, can comprise reinforcement in the form of a continuous reinforcement incorporated in the homogenized tobacco material. A continuous reinforcement can be incorporated into a tobacco material paste during the formation of the homogenized tobacco material. The continuous reinforcement is preferably a porous reinforcement sheet.

[0070] The porous reinforcement sheet must be sufficiently porous so that the tobacco material paste penetrates the pink reinforcement sheet before the paste dries, thus incorporating the reinforcement sheet in the homogenized tobacco material. Preferably, the porous reinforcement sheet is encapsulated within the dry homogenized paste to form the homogenized tobacco material. The porous reinforcement sheet can alternatively be called a porous reinforcement matrix. The porous reinforcement sheet may be a porous fiber sheet or a porous fiber matrix, such as a porous cellulose sheet or a sheet of paper or a flat porous fabric.

[0071] A porous reinforcement sheet formed from cellulose may be a preferred continuous reinforcement material. However, other materials can be used. For example, the porous reinforcement sheet can be a sheet that can be described as a pink fiber sheet or porous fiber matrix. The sheet fibers can be formed from other polymer materials such as polyethylene, polyester, polyphenylene sulfide or a polyolefin. The fibers can be natural materials like cotton.

[0072] The homogenized tobacco material, according to any aspect, can comprise water. The homogenized tobacco material, according to any aspect, can comprise flavorings, such as menthol.

[0073] As described above, it was discovered that the inclusion of the medium chain triglyceride oil defined in a homogenized tobacco material for the formation of an aerosol-generating substrate | An aerosol-generating article provides a significant improvement in the distribution of aerosol and nicotine from the aerosol-generating substrate by heating the aerosol-generating substrate.

[0074] Preferably, medium chain triglyceride oil provides an increase of at least 10% by weight of nicotine during heating of the aerosol generating substrate compared to an equivalent aerosol generating substrate without triglyceride oil medium-chain, in which the medium-chain triglyceride oil was replaced by an equivalent weight amount of previous aerosol. More preferably, medium chain triglyceride oil provides an increase of at least 15 percent by weight of nicotine when heating the aerosol-generating substrate in comparison to an aerosol-generating substrate | equivalent without medium chain triglyceride oil. For the purpose of such comparison, aerosol generating articles, including the aerosol generating substrate with and without medium chain triglyceride oil, are heated in a heating test as defined below.

[0075] In the heating test, the aerosol generating article! 1 is inserted into an aerosol generating device comprising a heating element for heating the aerosol generating substrate of the aerosol generating article. The heating element is programmed to heat the aerosol generating substrate to about 350 degrees Celsius for 360 seconds, to simulate the normal use of the aerosol generating article. During the heating of the aerosol generating article, the aerosol generating article is placed in a sealed glass bottle, so that the gas phase constituents released from the aerosol generating article during heating are collected. A sample of the constituents of the gas phase collected inside the flask is then removed and the concentration of the various triglycerides are determined using a test method as described above. An aerosol generating device suitable for the heating test is the commercially available Philip Morris International non-burning heating device iQOSQE.

[0076] Furthermore, it has been found that the effect of including the medium chain triglyceride oil defined in the homogenized tobacco material is even more significant at reduced operating temperatures. For example, in a heating test equivalent to that described above, but in which the heating element is programmed to heat the aerosol generating substrate to 300 degrees Celsius for 360 seconds, medium chain triglyceride oil preferably provides an increase in hair minus 20 percent by weight of nicotine when heating the aerosol-generating substrate in comparison to an equivalent aerosol-generating substrate without medium chain triglyceride oil.

[0077] The homogenized tobacco material can take any suitable shape within the aerosol generating substrate. In certain preferred embodiments, the aerosol generating substrate comprises a column comprising a grouped sheet of homogenized tobacco material.

[0078] As used in this document with reference to the invention, the term "column" is used to describe a generally cylindrical element of substantially circular, oval or elliptical cross-section.

[0079] As used in this document, in reference to the invention, the term "sheet" describes a laminar element with a length and width substantially greater than its thickness.

[0080] As used in this document with reference to the invention, the term "grouped" describes a sheet that is twisted, folded, compressed or substantially restricted in a transversal way to the longitudinal axis of the aerosol generating article.

[0081] Advantageously, the aerosol generating substrate comprises a grouped textured sheet of homogenized tobacco material. As used in this document with reference to the invention, the term "textured sheet" describes a sheet that has been crimped, embossed, embossed, perforated or deformed.

[0082] The use of a textured sheet of homogenized tobacco material can advantageously facilitate the grouping of the homogenized tobacco material sheet to form an aerosol-generating substrate.

[0083] The aerosol generating substrate may comprise a grouped textured sheet of homogenized tobacco material comprising a plurality of spaced indentations, protrusions, perforations or any combination thereof.

[0084] In certain preferred embodiments, the aerosol generating substrate comprises a crimped sheet of homogenized tobacco material. As used in this document with reference to the invention, the term "crimped sheet" describes a sheet with a plurality of substantially parallel edges or corrugations. Advantageously, when the aerosol generating article is assembled, the substantially parallel edges or corrections extend along or parallel to the longitudinal axis of the aerosol generating article. This facilitates the grouping of the crimped sheet of homogenized tobacco material to form the aerosol generating substrate.

However, it will be appreciated that the crimped sheets of homogenized tobacco material for inclusion in the aerosol forming substrates of the aerosol generating articles according to the invention may, alternatively or additionally, have a plurality of edges or corrugations that are arranged at an acute or obtuse angle relative to the longitudinal axis of the aerosol generating article when the aerosol generating article has been assembled.

[0086] Leaves of homogenized tobacco material for inclusion in the aerosol-generating substrates of aerosol-generating articles according to the invention preferably have a thickness between about 100 micrometers and about 400 micrometers, more preferably between about 125 micrometers and about 350 micrometers, more preferably between about 150 micrometers and about 300 micrometers, more preferably between about 175 micrometers and about 275 micrometers, most preferably between about 200 micrometers and about 250 micrometers, most preferably about 215 micrometers.

[0087] Preferably, the sheets of homogenized tobacco material have a base weight between about 150 grams per square meter (g / m?) And about 250 grams per square meter (g / m?), More preferably between about 170 g / m? and about 220 g / m ?, more preferably between about 180 g / m? and about 210 g / m ?, more preferably between about 195 g / m? and about 205 g / m ", more preferably about 200 g / m".

[0088] The thickness of the sheets of homogenized tobacco material can be measured using any suitable device, such as a high precision micrometer for soft material, for example L & W-250-F (measuring pressure 2 kPa, range 0) or equivalent. The thickness can be measured using a stack consisting of a number of sheets and the measured value is then divided by the number of sheets, for example, a stack of three sheets can be measured. To measure the weight of the sheets of homogenized tobacco material, the weight of a defined sheet size can be measured using any suitable device, such as a precision scale, such as Mettler Toledo XP205 (0.1 mg accuracy) or equivalent. The dimensions of the sheet can be measured using a straightedge, for example, Hirlinger 1 / 10mm or equivalent. The weight can then be calculated in a conventional manner.

[0089] As an alternative to using a pleated sheet of homogenized tobacco material, as described above, the aerosol generating substrate can be formed by a plurality of strips or pieces of a sheet of homogenized tobacco material. For example, the aerosol-generating substrate can be formed by a plurality of pieces of homogenized tobacco material that are aligned in the longitudinal direction and have been brought together and wrapped to form a column of aerosol-generating substrate.

[0090] The pieces of the homogenized tobacco material preferably have a size of between about 10 millimeters and about 20 millimeters, more preferably between about 12 millimeters and about 18 millimeters, more preferably between about 14 millimeters and about 16 millimeters, more preferably about 15 millimeters. Alternatively or in addition, the fragments of homogenized tobacco material preferably have a width of between about 0.4 mm and about 0.8 mm.

[0091] Preferably, the density of the homogenized tobacco material sheet from which the pieces are formed is between about 500 and about 1500 milligrams per cubic centimeter, more preferably between about 800 and about 1200 milligrams per cubic centimeter, more preferably between about 900 and about 1100 milligrams per cubic centimeter and most preferably between about 900 and about 970 milligrams per cubic centimeter.

[0092] Preferably, the bulk density of the homogenized tobacco material fragments within the aerosol generating substrate is between about 0.4 grams per cubic centimeter and about 0.8 grams per cubic centimeter, preferably between about 0.5 grams per cubic centimeter and about 0.7 grams per cubic centimeter and most preferably between about 0.65 grams per cubic centimeter and about 0.67 grams per cubic centimeter.

[0093] As described above, the homogenized tobacco material can be formed by molding a paste. Alternatively, the homogenized tobacco material can be formed by another suitable method, such as, for example, an extrusion method.

[0094] Preferably, the aerosol generating substrate comprises a column of homogenized tobacco material circumscribed by a wrapper, in which the wrapper is provided around and is in contact with the homogenized tobacco material. The wrapper can be formed from any suitable sheet material that is capable of being wrapped around homogenized tobacco material to form an aerosol-generating substrate. The shell can be porous or non-porous. Preferably, the wrapper is a paper wrapper, but the wrapper may, alternatively, not be paper.

[0095] The column of the aerosol generating substrate preferably has an external diameter that is approximately equal to the external diameter of the aerosol generating article.

[0096] Preferably, the column of the aerosol generating substrate has an external diameter of at least 5 millimeters. The column of the aerosol-generating substrate may have an outer diameter of between about 5 millimeters and about 12 millimeters, for example, between about 5 millimeters and about 10 millimeters or between about 6 millimeters and about 8 millimeters . In a preferred embodiment, the column of the aerosol generating substrate has an outer diameter of 7.2 millimeters, varying by 10 percent.

[0097] The column of the aerosol generating substrate can be between 7 mm and 15 mm long. In one embodiment, the column of the aerosol generating substrate may be about 10 millimeters long. In a preferred embodiment, the column of the aerosol generating substrate has a length of about 12 millimeters.

[0098] Preferably, the aerosol generating substrate column has a substantially uniform cross section along the length of the column. Particularly, preferably, the column of the aerosol generating substrate has a substantially circular cross section.

[0099] The aerosol-generating articles according to the invention preferably comprise one or more elements, in addition to the column of the aerosol-generating substrate, wherein the column and the one or more elements are assembled within a substrate shell. For example, aerosol-generating articles according to the invention can

they may also include at least one of them: a nozzle, an aerosol cooling element and a support element, such as a hollow acetate tube. For example, in a preferred embodiment, an aerosol generating article comprises, in a linear sequential arrangement, an aerosol generating substrate column as described above, a support element located immediately downstream of the aerosol generating substrate. aerosol, an aerosol cooling element located downstream of the support element and an external enclosure that circumscribes the column, the support element and the aerosol cooling element.

[0100] The aerosol generating systems according to the present invention comprise an aerosol generating article |, as described in detail above, in combination with an aerosol generating device which is adapted to receive the upstream end of the aerosol-generating article during smoking. The aerosol generating device comprises a heating element which is adapted to heat the aerosol generating substrate in order to generate an aerosol during use. Preferably, the heating element is adapted to penetrate the aerosol generating substrate when the aerosol generating article is inserted into the aerosol generating device.

[0101] Preferably, an aerosol generating device additionally comprises: a housing, an electrical power supply connected to the heating element and a control element configured to control the power supply from the power supply to the element of heating.

[0102] Aerosol generating devices suitable for use in the aerosol generating system of the present invention are described in WO-A-2013/098405.

[0103] The homogenized tobacco material for forming the aerosol-generating substrate of the aerosol-generating article according to the present invention, described in detail above, can be produced by using a method according to the fourth aspect of the invention, as defined above. In a first stage of the method according to the present invention, a homogenized paste is formed comprising tobacco material, a medium chain triglyceride oil and water. Medium chain triglyceride oil has a melting point below 18 degrees Celsius and comprises one or more triglycerides with at least two fatty acid chains with a chain length between 6 and 12 atoms. Medium chain triglyceride oil has an iodine value of less than 2. In a second step, the homogenized paste is molded on a moving belt. In a third step, the homogenized paste is dried to form a sheet of homogenized tobacco material. The molding and drying steps can be carried out using conventional procedures.

[0104] In accordance with the present invention, all steps of the method are carried out without any external heating of the homogenized paste. As described in more detail above, this is possible because the medium chain triglyceride oil is in liquid form at room temperature and thus can be easily incorporated into the paste without the need for oil heating.

[0105] Other components for forming the homogenized tobacco material can be incorporated into the paste, as necessary, before molding the paste. For example, the homogenized paste may further comprise one or more of: an aerosol former, a binder and reinforcement fibers.

[0106] After the sheet of homogenized tobacco material has dried, the sheet can be rolled into reels for storage so that it can be used later to form the columns of the aerosol generating substrate. As described above, when the sheet of

homogenized tobacco material is subsequently unwound from the coils to form the columns of the aerosol generating substrate, a certain proportion of the homogenized tobacco material is wasted due to leaf damage. Preferably, the percentage of waste of a homogenized tobacco material according to the invention that incorporates medium chain triglyceride oil as defined is at least about 10 percent less than the percentage of waste of a tobacco material equivalent homogenized tobacco without medium chain triglyceride oil, after storing the homogenized tobacco material for 40 days, more preferably about 20 percent less and, preferably, at least about 30 percent less.

[0107] As described above, this reduced level of waste appears to be an advantageous result of reducing the viscosity of the homogenized tobacco material when the defined medium chain triglyceride is incorporated.

[0108] The invention will be described below, by way of example only, with reference to the attached figures, in which:

[0109] Figure 1 is a schematic cross-sectional view of an aerosol-generating article | according to a first embodiment of the invention;

[0110] Figure 2 is a schematic cross-sectional view of an aerosol generating system comprising a heated aerosol generating device and an aerosol generating article according to the embodiment illustrated in Figure 1; and

[0111] Figure 3 shows a schematic cross-sectional view of the electrically heated aerosol generating device of Figure

two.

[0112] The aerosol generating article 10 shown in the Figure | with-

comprises four elements arranged in coaxial alignment: an aerosol generating substrate 20, a support element 30, an aerosol cooling element 40 and a nozzle 50. Each of the four elements is circumscribed by a corresponding plug housing (not shown). These four elements are arranged sequentially and are circumscribed by an outer shell 60 to form the aerosol generating article 10. The aerosol generator 10 has a proximal or nozzle end 70, which a user inserts into his mouth during use and a distal end 80 located at the opposite end of the aerosol generating article 10 with respect to the nozzle end 70.

[0113] In use, air is sucked through the aerosol-generating article by a user from the distal end 80 to the nozzle end 70. The distal end 80 of the aerosol-generating article can also be described as the upstream end aerosol generator article | 10 and the nozzle end 70 of the aerosol generating article can also be described as the downstream end of the aerosol generating article 10. The elements of the aerosol generating article 10 located between the nozzle end 70 and the distal end 80 can be described as being upstream of the nozzle end 70 or, alternatively, downstream of the distal end 80.

[0114] The aerosol generating substrate 20 is located at the distal end or at the upstream end of the aerosol generating article 10. In the embodiment illustrated in Figure 1, the aerosol generating substrate 20 comprises a grouped sheet of the aerosol material. homogenized cured tobacco circumscribed by a wrapper. The crimped sheet of the homogenized tobacco material comprises glycerin as an aerosol former. The aerosol generating substrate 20 also comprises at least 1 weight percent of a medium chain triglyceride oil, based on the total dry weight of the aerosol generating substrate.

Rossol 20. Suitable formulations for the homogenized tobacco material are provided in Table 1 below.

[0115] The support element 30 is located immediately downstream of the aerosol generating substrate 20 and is leaning against the aerosol generating substrate 20. In the embodiment shown in Figure 1, the support element is a hollow cellulose acetate tube . The support element 30 locates the aerosol generating substrate 20 at the distal end 80 of the aerosol generating article 10, so that it can be penetrated by a heating element of an aerosol generating device. As described in more detail below, the support element 30 acts to prevent the aerosol generating substrate 20 from being forced downstream into the aerosol generating article 10 towards the aerosol cooling element 40 when a heating element of a aerosol generating device is inserted into the aerosol generating substrate 20. The support element 30 also acts as a separator to separate the aerosol cooling element | 40 pertaining to the aerosol generating article 10 of the aerosol generating substrate 20.

[0116] The aerosol cooling element 40 is located immediately downstream of the support element 30 and leans against the support element 30. In use, the volatile substances released by the aerosol generating substrate 20 pass through the cooling element aerosol 40 towards the nozzle end 70 of the aerosol generating article 10. Volatile substances can cool within the aerosol cooling element 40 to form an aerosol that is inhaled by the user. In the embodiment illustrated in Figure 1, the aerosol cooling element comprises a grouped and crimped sheet of polylactic acid circumscribed by a wrapper 90. The grouped and crimped sheet of polylactic acid defines a plurality of longitudinal channels that extend along the length of the aerosol cooling element 40.

[0117] The nozzle 50 is located immediately downstream of the aerosol cooling element 40 and leans against the aerosol cooling element 40. In the embodiment illustrated in Figure 1, the mouth 50 comprises an acetate fiber filter of conventional cellulose with low filtration efficiency.

[0118] To assemble the aerosol generating article 10, the four elements described above are aligned and firmly wrapped within the outer wrapper 60. In the embodiment illustrated in Figure 1, the outer wrapper 60 is a conventional cigarette paper. As shown in Figure 1, an optional perforation row is provided in a region of the outer shell 60 circumscribing the support element 30 of the aerosol-generating article 10. A portion of the final portion of the outer shell 60 of the aerosol-generating article 10 is circumscribed by a tip paper strip (not shown).

[0119] The aerosol generating article 10 illustrated in Figure 1 is designed to be coupled with an aerosol generating device that comprises a heating element to be consumed by a user. In use, the heating element of the aerosol generating device | heats the aerosol-generating substrate 20 of the aerosol-generating article 10 to a temperature sufficient to form an aerosol, which is transported downstream through the aerosol-generating article 10 and inhaled by the user.

[0120] During heating of the aerosol generating substrate, the medium chain triglyceride in the aerosol generating substrate acts to increase the nicotine emitted from tobacco in the aerosol generating substrate, as shown in the example below.

[0121] Figure 2 illustrates a portion of an aerosol generating system 100 comprising an aerosol generating device 110 and an aerosol generating article 10 according to the embodiment described above and illustrated in Figure 1.

[0122] The aerosol generating device 110 comprises a heating element 120. As shown in Figure 2, the heating element 120 is mounted within an aerosol generating article that receives the chamber of the aerosol generating device 110. When in use, the user inserts the aerosol generating article 10 into the chamber receiving the aerosol generating article from the aerosol generating device 110 so that the heating element 120 is inserted directly into the aerosol generating substrate 20 of the generating article aerosol 10, as shown in Figure 2. In the embodiment shown in Figure 2, the heating element 120 of the aerosol generating device 110 is a heater blade.

[0123] The aerosol generating device 110 comprises a power supply and electronic components (shown in Figure 3) that allow the heating element 120 to be activated. This drive can be operated manually or can occur automatically in response to a user swallowing the aerosol-generating article | 10 inserted in the chamber that receives the aerosol generating article | aerosol generating device 110. A plurality of openings are provided in the aerosol generating device to allow air to flow into the aerosol generating article 10; the air flow direction is illustrated by arrows in Figure 2.

[0124] The support element 40 of the aerosol generating article 10 resists the penetrating force experienced by the aerosol generating article 10 during the insertion of the heating element 120 of the aerosol generating device 110 in the aerosol generating substrate 20 The support element 40 of the aerosol generating article 10 thus resists movement downstream of the aerosol generating substrate 20 within the aerosol generating article 10 during insertion of the heating element 120 of the aerosol generating device 110 into the aerosol generating substrate 20.

[0125] Once the internal heating element 120 is inserted into the aerosol generating substrate 20 of the aerosol generating article 10 and the heating element 120 is activated, the aerosol generating substrate 20 of the generating article aerosol generator 10 is heated to a temperature of approximately 350 degrees Celsius by the heating element 120 of the aerosol generating device 110. At this temperature, the volatile compounds are expanded from the aerosol generating substrate 20 of the aerosol generating article 10 As a user bring in the nozzle end 70 of the aerosol generating article! 10, the expanded volatile compounds of the aerosol-generating substrate 20 are drawn downstream through the aerosol-generating article | 10 and condense to form an aerosol which is swallowed through the nozzle end 50 of the aerosol generating article 10 into the user's mouth.

[0126] As the aerosol passes downstream through the aerosol cooling element 40, the temperature of the aerosol is reduced due to the transfer of thermal energy from the aerosol to the aerosol cooling element 40. When the aerosol enters the cooling element aerosol cooling 40, its temperature is approximately 60 degrees Celsius. Due to the cooling inside the aerosol cooling element 40, the aerosol temperature coming out of the aerosol cooling element is approximately 40 degrees Celsius.

[0127] In Figure 3, the components of an aerosol generating device | 110 are shown in a simplified form. Specifically, the components of the aerosol generating device 110 are not drawn to scale in Figure 3. The components that are not relevant for understanding this modality have been omitted to simplify Figure 3.

[0128] As shown in Figure 3, the aerosol generating device 110 comprises a housing 130. The heating element 120 is mounted inside a chamber that receives the aerosol generating article inside the housing 130. The generating article aerosol dispenser 10 (indicated with dashed lines in Figure 3) is inserted into the chamber that receives the aerosol generating article inside the housing 130 of the aerosol generating device 110, so that the heating element 120 is inserted directly into the generating substrate spray 20 of the aerosol generating article 10.

[0129] Inside the housing 130 there is an electrical power supply 140, for example, a rechargeable lithium ion battery. A controller 150 is connected to heating element 120, electrical power supply 140 and an interface 160, for example, a button or display. The controller 150 controls the energy supplied to the heating element 120 to regulate its temperature. Example

[0130] Homogenized tobacco leaves were formed based on each of the A-D compositions shown below in Table 1, using a method as described above:% by weight% by weight% by weight% by weight Table 1

[0131] The MCT oil used for sheets B, C and D was GrindstedO MCT 60 X from Danisco. For each tobacco leaf, the tobacco leaf was formed on an aerosol-generating substrate, using conventional techniques. Then, an aerosol-generating article | was assembled,

as described above, with reference to Figure 1. The aerosol-generating articles incorporating Leaves B, C and D are in accordance with the present invention, with medium chain triglyceride oil in the homogenized tobacco leaf. The aerosol-generating article that incorporates Sheet A, which does not include medium chain triglyceride oil, is a control sample for comparison purposes.

[0132] Each aerosol generating article was subjected to the heating test defined above, both at 350 degrees Celsius and at 300 degrees Celsius. The nicotine level in the aerosol supplied from each aerosol-generating article was measured, with the results shown below in Table 2.

[0133] As can be seen in Table 2, an increase in nicotine distribution from the aerosol-generating substrate was observed for most aerosol-generating articles that incorporate medium-chain triglycerides in the homogenized tobacco material , in relation to the control sample. In the case of the aerosol generator article that incorporates Sheet D, with 5 percent by weight of medium chain triglyceride oil, an increase in nicotine distribution of more than 10 percent was observed in relation to the sample. of control. When the temperature was reduced to 300 degrees Celsius, this increase in nicotine compared to the control sample rose to 25 percent.

MCT oil level in subs- | Distribution of Distribution of aerosol generating tract | nicotine at 350ºC | % increase | nicotine at 300ºC |% increase [ei do e ELLE E e e

EA A Table 2

[0134] The homogenized tobacco leaves formed according to the example above or any other homogenized tobacco material can be analyzed in order to determine the content of medium chain triglycerides using the sample test method described below. Example of a test method for determining the content of medium chain triglycerides

[0135] In a first stage, the homogenized tobacco material is ground to reduce the size, using cryogenic grinding with liquid nitrogen.

[0136] In a second stage, the homogenized tobacco material is extracted in methanol. In this step, 100 mg of the ground tobacco material is diluted with 5 milliliters of LC-MS grade methanol containing the standard isophorone-d8 (10.62 micrograms per millimeter) and decanoic acid-d19 (20.52 micrograms per millimeter) , both available from CDN Isotopes Inc. This is followed by vortexing the liquid extract for 5 minutes and centrifuging the liquid extract for 5 minutes at 10 degrees Celsius to separate the solid particles from the liquid extract. 200 microliters of the remaining liquid extract are diluted with 800 microliters of methanol and mixed for 5 minutes at 5 degrees Celsius and 2000 rpm, for example in a ThermoMixer "Y",

[0137] In a third step, the resulting sample is subjected to chromatographic analysis using reverse phase separation. A suitable device for carrying out a chromatographic analysis is a Hypersil "Y GOLD column (150 x 2.1 mm, 1.9 microns; available from ThermoScientific, Waltham, MA, USA) equipped with a filter cartridge UHPLC protection (10 x 2.1 millimeters, 0.2 micrometers; available from ThermoScientific, Waltham, MA, USA) operating at 50 degrees Celsius with an injection volume of 1.5 microliters with a maintained auto-sample temperature of 5 degrees Celsius.

[0138] In a fourth step, the separate components of the chromatographic column are transferred to a mass spectrometer, for example, a Thermo QExactive! Y mass spectrometer operated in full scan and MS modes? dependent on data using heated electron spray ionization (HESI) in positive and negative mode.

[0139] In a final step, data from mass spectrometric detection are analyzed to identify the compounds present. Is compound identification carried out using a semi-automatic step-by-step approach, comparing detected constituents with reference compounds in an MS fragmentation database? experimental and predicted in-silica fragmentation of chemicals from public databases. All putative hits are scored using Progenesis QITY algorithms. The semi-quantification of the compounds can be accomplished by using the abundance of peak volume.

Claims (13)

1. Heated aerosol-generating article for the production of an inhalable aerosol, characterized by the fact that it comprises an aerosol-generating substrate column, in which the column of the aerosol-generating substrate is formed by one or more sheets of a tobacco material homogenized, the homogenized tobacco material being formed from an agglomerate of tobacco material particles and comprising 1 weight percent and 10 weight percent of a medium chain triglyceride oil, on a dry weight basis, medium chain triglyceride oil having a melting point below 18 degrees Celsius and comprising one or more triglycerides with at least two fatty acid chains with a chain length between 6 and 12 carbon atoms, where one or more sheets of homogenized tobacco material are selected from reconstituted tobacco sheet and coated sheet. 2. Heated aerosol-generating article, according to claim 1, characterized by the fact that medium chain triglyceride oil has an iodine value of less than 2. 3. Heated aerosol-generating article, according to claim 1 or 2, characterized by the fact that medium chain triglyceride oil has a melting point below 15 degrees Celsius, preferably below 10 degrees Celsius. 4. A heated aerosol-generating article according to any one of claims 1 to 3, characterized in that the medium chain triglyceride oil comprises at least 80 percent triglycerides with at least two fatty acid chains with a chain length between 8 and 10 carbon atoms. 5. Heated aerosol-generating article according to any of claims 1 to 4, characterized in that the total content of medium chain triglyceride oil in the homogenized tobacco material is between 1 weight percent and 5 weight percent on a dry weight basis. A heated aerosol-generating article according to any one of claims 1 to 5, characterized in that the homogenized tobacco material comprises at least about 70 weight percent of tobacco on a dry weight basis. 7. Heated aerosol-generating article according to any one of claims 1 to 6, characterized in that the homogenized tobacco material further comprises one or more aerosol makers. 8. Heated aerosol-generating article according to claim 7, characterized by the fact that the total aerosol-forming content in the homogenized tobacco material is between 5 percent by weight and 20 percent by weight on a base dry weight. 9. Heated aerosol-generating article according to any one of claims 1 to 8, characterized in that the homogenized tobacco material further comprises at least 1 weight percent of reinforcement fibers on a dry weight basis . 10. Heated aerosol-generating article according to any one of claims 1 to 9, characterized in that the aerosol-generating substrate | it is a column formed from a grouped sheet of homogenized tobacco material. 11. Aerosol-generating substrate column characterized by the fact that it is for use in a heated aerosol-generating article, as defined in any one of claims 1 to 10, the aerosol-generating substrate comprising a tobacco material homogenized between 1 weight percent and 10 weight percent medium chain triglyceride oil, on a dry weight basis, medium chain triglyceride oil having a melting point below 18 degrees Celsius and comprising one or more triglycerides with at least two fatty acid chains with a chain length between 6 and 12 carbon atoms. 12. Aerosol generating system, characterized by the fact that it comprises: an aerosol generating device that comprises a heating element; and an aerosol generating article for use with the aerosol generating device, the aerosol generating article comprising an aerosol generating substrate column, wherein the column of the aerosol generating substrate is formed by one or more sheets of a material of homogenized tobacco, the homogenized tobacco material being formed of an agglomeration of tobacco material particles and comprising between 1 weight percent and 10 weight percent of a medium chain triglyceride oil, on a dry weight basis, o medium chain triglyceride oil with a melting point below 18 degrees Celsius and comprising one or more triglycerides with one or more triglycerides with at least two fatty acid chains with a chain length between 6 and 12 carbon atoms , in which one or more sheets of homogenized tobacco material are selected from reconstituted tobacco sheet and coated sheet. 13. Method of manufacturing a homogenized tobacco material for use in an aerosol-generating article, as defined in claim 1, characterized by the fact that it comprises the steps of: forming a homogenized paste comprising tobacco material, water and medium chain triglyceride oil with a melting point below 18 degrees Celsius and comprising one or more triglycerides with at least two fatty acid chains with a chain length between 6 and 12 carbon atoms; molding of the homogenized paste on a conveyor belt; and drying the molded paste to form a homogenized tobacco material, where the method is carried out without any external heating of the paste. 40 50 Ó ” TOO Í j V É Figure 1 Ú 1 NX 120 30 / ETC. Figure 2 X 130 120 150 140 = o) ud Fr. S Ç À y, 160 Figure 3