Aerosol-generating sheet, flavor-generating composition, and heat-not-burn type smoking article

Abstract

This aerosol-generating sheet comprises (A) 15-50% by weight of a tobacco extract, (B) 6-20% by weight of a binder, and (C) 15-60% by weight of an aerosol source, and has a basis weight of 0.10-0.25 mg / mm2.

Description

Aerosol-generating sheet, flavor-generating composition, and non-combustion heated smoking article

[0001] The present invention relates to an aerosol-generating sheet, a flavor-generating composition, and a non-combustion-heated smoking article.

[0002] Heat-type smoking articles that generate flavor components by heating have been proposed. For example, Patent Document 1 discloses a heated smoking article that contains at least 40% tobacco content on a dry weight basis, 1 to 5% non-tobacco fiber on a dry weight basis, an aerosol former content of more than 5% on a dry weight basis, and an external binder, and has a capacity of 100 g / m ２ to 300 g / m ２ A cast sheet for heated smoking articles is disclosed having a basis weight of

[0003] Patent No. 6883614

[0004] Flavor sources for smoking articles are required to efficiently deliver flavor components. In view of this situation, an object of the present invention is to provide an aerosol-generating sheet that allows highly volatile components to be delivered.

[0005] The inventors have found that the above-mentioned problems can be solved by an aerosol-generating sheet having a specific composition and basis weight. That is, the above-mentioned problems are solved by the following invention. Aspect 1 An aerosol-generating sheet comprising: (A) 15 to 50% by weight of tobacco extract; (B) 6 to 20% by weight of a binder; and (C) 15 to 60% by weight of an aerosol source, and having a basis weight of 0.10 to 0.25 mg / mm ２ Aspect 2: An aerosol-generating sheet having a density of 0.2 to 0.6 mg / mm ３Aspect 3: The sheet according to Aspect 1 or 2, having a plurality of dispersed air bubbles therein or having through-holes penetrating both major surfaces. Aspect 4: The sheet according to any one of Aspects 1 to 3, wherein the binder is selected from the group consisting of cellulose derivatives, xanthan gum, guar gum, carrageenan, locust bean gum, alginic acid, sodium alginate, starch, water-soluble soy polysaccharides, and combinations thereof. Aspect 5: The sheet according to any one of Aspects 1 to 4, wherein the cellulose derivative comprises a hydroxyalkyl alkyl cellulose, a carboxyalkyl cellulose, or an alkyl cellulose. Aspect 6: The sheet according to Aspect 5, wherein the cellulose derivative comprises hydroxypropyl methyl cellulose (HPMC) and carboxymethyl cellulose (CMC), and the weight ratio of HPMC to CMC is 0.5:1 to 2:1. Aspect 7 An aerosol-generating sheet according to any one of Aspects 1 to 6, further comprising (D) fibers, wherein the weight ratio between the (B) binder and the (D) fiber component satisfies the following: 0.30≦(B) / (D)≦1.2. Aspect 8 An aerosol-generating sheet according to any one of Aspects 1 to 7, wherein the weight ratio between the (C) aerosol source and the (B) binder satisfies the following: 2.0≦(C) / (B)≦4.0. Aspect 9 An aerosol-generating sheet according to any one of Aspects 1 to 8, wherein the moisture release rate calculated by the following method: 1) heating the sheet at 100°C to remove water, and obtaining a weight loss-time curve from the relationship between the weight loss rate and time, and 2) calculating the moisture release rate from the initial slope of the curve is 0.15 (wt % / sec) or more. Aspect 10 An aerosol-generating composition comprising the aerosol-generating sheet according to any one of Aspects 1 to 9, and tobacco leaves. Aspect 11. A non-combustion heated smoking article comprising a tobacco segment comprising the aerosol-generating sheet according to any one of Aspects 1 to 9, or the flavor generating composition according to Aspect 10. Aspect 12. A non-combustion heated smoking system comprising the non-combustion heated smoking article according to Aspect 11 and a heating device.Aspect 13 A method for producing an aerosol-generating sheet according to any one of Aspects 1 to 9, comprising the steps of: whipping and stirring (A), (B), and (C) to prepare a mixture containing gas bubbles therein; and forming the mixture into a sheet. Aspect 14 The method according to Aspect 13, wherein the solid-liquid ratio of the mixture is 1:1 to 1:8, and the weight ratio (C) / (B) in the mixture satisfies the following: 2.0≦(C) / (B)≦4.0.

[0006] The present invention can provide an aerosol-generating sheet containing highly volatile components.

[0007] FIG. 1 shows the weight loss behavior of the aerosol-generating sheet at 200° C. FIG. 2 shows the weight loss behavior of the aerosol-generating sheet at 100° C. FIG. 3 shows an embodiment of a non-combustion heating smoking article. FIG. 4 shows an embodiment of a non-combustion heating smoking system.

[0008] In this disclosure, "X to Y" includes the extreme values ​​X and Y. Unless otherwise specified, weights and weight percentages are dry weights and dry weight percentages. Dry weight is the weight excluding the weight of water.

[0009] 1. Aerosol-Generating Sheet An aerosol-generating sheet (hereinafter also referred to as "sheet") is a sheet that generates an aerosol when heated. In one embodiment, the aerosol-generating sheet contains (A) 15 to 50% by weight of tobacco extract, (B) 6 to 20% by weight of binder, and (C) 15 to 60% by weight of aerosol source, and has a concentration of 0.10 to 0.25 mg / mm ２ The sheet has a basis weight of .

[0010] (1) Tobacco Extract (A) Tobacco extract (hereinafter also referred to as "component (A)") is an active ingredient (component other than the medium used in the extraction) contained in an extract obtained by subjecting tobacco raw materials to extraction. Extraction can be carried out in a known manner, and examples include the following methods: 1) a method in which tobacco raw materials are subjected to extraction using a medium to obtain a tobacco extract; 2) a method in which a medium is added to tobacco raw materials and heated, the generated vapor is collected, and a tobacco extract is obtained; and 3) a method in which a medium that has been vaporized by heating is passed through tobacco raw materials and the vapor after passing is collected to obtain a tobacco extract. Examples of the medium include water, a hydrophilic organic solvent such as alcohol, or a combination thereof, and the medium is preferably water or contains water.

[0011] In method 1), it is preferable to use water as the medium from the viewpoint of workability, etc. Furthermore, in methods 2) and 3), it is preferable to use an alcohol such as glycerin, propylene glycol, triacetin, 1,3-butanediol, or ethanol as the medium from the viewpoint of work efficiency. Acid or alkali can also be used for extraction as needed. The liquid obtained by extraction, containing the tobacco extract and the medium, is called a tobacco extract.

[0012] As the tobacco raw material, for example, raw materials of the Nicotiana genus such as Nicotiana tabacum and Nicotiana rustica can be used. As Nicotiana tabacum, for example, varieties such as Burley or flue-cured varieties can be used. In addition to these, Oriental varieties and native Burley varieties of the Nicotiana genus may also be used.

[0013] The tobacco raw material may be shredded or powdered tobacco raw material (hereinafter also referred to as "raw material pieces"). In such cases, the particle size of the raw material pieces is preferably 0.5 to 1.18 mm. Such raw material pieces can be obtained, for example, by sieving in accordance with JIS Z 8815 using a stainless steel sieve in accordance with JIS Z 8801. For example, 1) using a stainless steel sieve with 1.18 mm meshes, the raw material pieces are sieved by a dry mechanical shaking method for 20 minutes to obtain raw material pieces that pass through the stainless steel sieve with 1.18 mm meshes. 2) Subsequently, using a stainless steel sieve with 0.50 mm meshes, the raw material pieces are sieved by a dry mechanical shaking method for 20 minutes to remove the raw material pieces that pass through the stainless steel sieve with 0.50 mm meshes. In this way, raw material pieces can be prepared that pass through a stainless steel sieve (mesh opening = 1.18 mm) that defines the upper limit, but do not pass through a stainless steel sieve (mesh opening = 0.50 mm) that defines the lower limit.

[0014] In one embodiment, the tobacco raw material is treated with an alkali. Flavor components are generated through this treatment, and these are collected to prepare a tobacco extract and a tobacco extract residue. In this process, the flavor components are extracted as a gas from the alkali-treated tobacco raw material, and the gas can be introduced into water to convert the flavor components into a liquid, thereby obtaining a tobacco extract.

[0015] The alkaline substance is preferably an alkaline liquid such as an aqueous potassium carbonate solution. In this case, the alkaline substance is supplied until the pH of the tobacco raw material falls within a specific range. This pH is preferably 8.0 or higher, more preferably 8.9 to 9.7. The pH of the tobacco raw material refers to the pH of water when the tobacco raw material is mixed with 10 times the amount of water.

[0016] The moisture content of the tobacco raw material subjected to extraction is not limited, but from the viewpoint of efficiently extracting flavor components, the moisture content is preferably approximately 5 to 30% by weight. The moisture content of the tobacco raw material is measured by a known method; for example, a 1-g sample is taken, heated at 105°C, and the weight loss when heated until the weight change rate is 1 mg / min or less is taken as the moisture content. For example, a halogen heating moisture meter (such as the MB45 manufactured by Ohaus Co., Ltd.) can be used for this measurement.

[0017] The tobacco extract preferably contains a large amount of nicotine. From this perspective, the amount of nicotine in the extraction residue is preferably 1% by weight or less, and more preferably 0.5% by weight or less, of the amount of nicotine in the tobacco raw material.

[0018] The tobacco extract content in the aerosol-generating sheet is 15 to 50 wt %. If this amount is less than the lower limit, the smoking taste will be insufficient. If this amount is more than the upper limit, the flavor will be inhibited. From this perspective, the content of component (A) is preferably 25 to 45 wt %.

[0019] (2) Binder (B) The binder (hereinafter also referred to as "component (B)") imparts strength to the sheet. Known binders can be used, but are preferably selected from the group consisting of cellulose derivatives, xanthan gum, guar gum, carrageenan, locust bean gum, alginic acid, sodium alginate, starch, water-soluble soybean polysaccharides, and combinations thereof. Examples of cellulose derivatives include alkyl cellulose, hydroxyalkyl alkyl cellulose, and carboxyalkyl cellulose. More specific examples of cellulose derivatives include methyl cellulose, hydroxyethyl methyl cellulose (HEMC), hydroxypropyl methyl cellulose (HPMC), hydroxypropyl cellulose (HPC), carboxymethyl cellulose (CMC), and salts thereof. Among these, it is preferable to use hydroxypropyl methyl cellulose (HPMC) and carboxymethyl cellulose (CMC) in combination. In this case, the blending ratio (weight ratio) of HPMC to CMC is preferably 0.5:1 to 2:1. This blending ratio can improve the foamability of the sheet and make it difficult for bubbles to collapse during drying.

[0020] The amount of component (B) in the aerosol-generating sheet is 6 to 20% by weight. If this amount is less than the lower limit, sufficient strength cannot be obtained. Furthermore, if component (B) is less than the lower limit, foaming ability decreases, making it difficult to form bubbles, through-holes, or recesses in the aerosol-generating sheet. This makes it difficult to achieve the desired basis weight or density, which in turn reduces the volatility of the components of the aerosol-generating sheet. If this amount exceeds the upper limit, the density of the sheet increases and the volatility of the components of the aerosol-generating sheet decreases. However, the amount of component (B) is appropriately adjusted in relation to the amounts of the other components, as described below.

[0021] (3) Aerosol Source (C) The aerosol source (hereinafter also referred to as "component (C)") is a substance that forms an aerosol upon heating. Examples of aerosol sources include polyhydric alcohols such as glycerin or polyethylene glycol. The amount of component (C) in the sheet is 15 to 60 wt %. If this amount is below the lower limit, the amount of smoke produced when smoking is insufficient. Furthermore, the elasticity of the sheet decreases, making it difficult to form bubbles, through-holes, and recesses during sheet production. This makes it difficult to achieve the desired basis weight or density, which in turn reduces the volatility of the components of the aerosol-generating sheet. If this amount exceeds the upper limit, the handleability of the sheet decreases. Furthermore, the basis weight and density of the sheet increase, reducing the volatility of the components of the aerosol-generating sheet. From this perspective, the amount is preferably 15 to 50 wt %, more preferably 20 to 40 wt %.

[0022] Components (B) and (C) have a significant effect on the density and strength of the sheet. By setting the amounts of components (B) and (C) within appropriate ranges, advantages include ensuring a sufficient amount of smoke during smoking, improving the volatility of the components, and improving the handleability of the sheet. Furthermore, sufficient sheet strength can be obtained. From this perspective, the weight ratio (C) / (B) of components (C) to (B) is preferably 2.0 to 4.0, more preferably 2.0 to 3.0, and even more preferably 2.5 to 3.0. When the weight ratio (C) / (B) is within this range, the content of component (B) in the sheet is more preferably 10% by weight or more.

[0023] (4) Fiber (D) The aerosol-generating sheet preferably contains fiber (hereinafter also referred to as "component (D)"). Known examples of fibers include wood fiber and non-wood fiber. Sheets containing non-wood fiber have the advantage of superior liquid-holding capacity compared to sheets containing wood fiber. Therefore, the amount of non-wood fiber added can be reduced, enabling the amount of components that contribute to the flavor and aroma to be increased. From this perspective, the fiber is preferably non-wood fiber. Non-wood fiber is fiber not derived from wood, and may be tobacco fiber or a fiber other than tobacco fiber. From the perspective of imparting strength, dietary fiber is preferred as the non-wood fiber. Dietary fiber is a dietary component that is not digested by human digestive enzymes, and is more preferably insoluble dietary fiber that does not dissolve in water. The dietary fiber may be porous, i.e., spongy. From the perspective of availability, the fiber is preferably citrus fiber. Citrus fiber is fiber made primarily from the albedo of citrus fruits. Furthermore, dietary fiber may be short fiber or columnar particles with a small aspect ratio. Citrus fiber is particularly preferred because it can impart strength to smoking article materials with a small amount. In one embodiment, the content of component (D) in the smoking article material is 10 to 30 wt %. If this amount is below the lower limit, the sheet may become less easy to handle and may have a reduced strength. On the other hand, if this amount exceeds the upper limit, the flavor may become weaker and unpleasant flavors may increase.

[0024] Components (B) and (D) have a significant effect on the density and strength of the sheet. By adjusting the amounts of components (B) and (D) within appropriate ranges, the sheet can be easily handled and have sufficient strength. Furthermore, bubbles, through-holes, or recesses can be easily formed in the aerosol-generating sheet, allowing it to have a desired basis weight or density. As a result, the volatility of the components in the aerosol-generating sheet is improved. From this perspective, the weight ratio (B) / (D) of components (B) to (D) is preferably 0.30 to 1.2, and more preferably 0.6 to 1.2.

[0025] (5) Other Components The sheet may contain a known fragrance. Examples of fragrances include menthol, but are not limited to this, and the fragrances described below can also be used. The amount of fragrance may also be a known amount. These fragrances may be used alone or in combination of two or more.

[0026] Preferred fragrances include acetanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, Peru balsam oil, beeswax absolute, benzaldehyde, benzoin resinoid, benzyl alcohol, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, β-carotene, carrot juice, L-carnitine, benzoin ... benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, β-carotene, carrot juice, L-carnitine, benzoin, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, β-carotene, carrot juice, L-carnitine, benzoin, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, β-carotene, carrot juice, L-carnitine, Rubone, β-caryophyllene, cassia bark oil, cedarwood oil, celery seed oil, chamomile oil, cinnamaldehyde, cinnamic acid, cinnamyl alcohol, cinnamyl cinnamate, citronella oil, DL-citronellol, clary sage extract, cocoa, coffee, konjac oil, coriander oil, cuminaldehyde, davana oil, δ-decalactone, γ-decalactone, decanoic acid, dill herb oil, 3,4-dimethyl-1,2-cyclopentanedione, 4,5-dimethyl-3-hydroxy-2,5-dihydrofuran-2-one, 3,7-dimethyl 1-octenoic acid, 2,3-dimethylpyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl octanoate, ethyl oleate, ethyl palmitate, ethyl phenylacetate, ethyl propionate, ethyl stearate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3,(5 or 6)-dimethylpyrazine, 5-ethyl-3-hydroxybenzoate Cis-4-methyl-2(5H)-furanone, 2-ethyl-3-methylpyrazine, eucalyptol, fenugreek absolute, gene absolute, gentian root infusion, geraniol, geranyl acetate, grape juice, guaiacol, guava extract, gamma-heptalactone, gamma-hexalactone, hexanoic acid, cis-3-hexen-1-ol, hexyl acetate, hexyl alcohol, phenylhexyl acetate, honey, 4-hydroxy-3-pentenoic acid lactone, 4-hydroxy-4-(3-hydroxy-1-butenyl)-3,5,5-trimethyl-2-cyclohexen-1-one, 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, inmortell absolute, beta-ionone, isoamyl acetate, isoamyl butyrate, isoamyl phenylacetate, isobutyl acetate, isobutyl phenylacetate, jasmine absolute, cola nut tincture, labdanum oil, lemon terpeneless oil, licorice extract, linalool, linalyl acetate, lovage root oil, maltol, maple Syrup, menthol, menthone, L-menthyl acetate, para-methoxybenzaldehyde, methyl 2-pyrrolyl ketone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methylvaleric acid, mimosa absolute, honey, myristic acid, nerol, nerolidol, gamma-nonalactone, nutmeg oil, delta-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, omega-pentane Intadecalactone, peppermint oil, petitgrain Paraguay oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract, propenylguaethol, propyl acetate, 3-propylidenephthalide, prune juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax absolute, marigold oil, tea distillate, alpha-terpineol, terpinyl acetate, 5,6,7, 8-Tetrahydroquinoxaline, 1,5,5,9-tetramethyl-13-oxacyclo(8.3.0.0(4.9))tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tridecanone, triethyl citrate, 4-(2,6,6-trimethyl-1-cyclohexenyl)2-buten-4-one, 2,6,6-trimethyl-2-cyclohexene-1,4-dione, 4-(2,6,6-trimethyl-1,3-cyclohexadienyl)2-buten-4-one, 2,3,5-trimethylpyrazine, γ-undecalactone, γ-valerolactone, vanilla extract, vanillin, veratraldehyde, violet leaf absolute, N-ethyl-p-menthane-3-carboxamide (WS-3), ethyl-2-(p-menthane-3-carboxamide) acetate (WS-5).

[0027] (6) Characteristics 1) Basis Weight The basis weight of the aerosol-generating sheet is 0.10 to 0.25 mg / mm ２ If the amount is less than the lower limit, the strength of the sheet will be insufficient. If the basis weight exceeds the upper limit, the volatility of the components of the aerosol-generating sheet will decrease. From this perspective, the basis weight is preferably 0.10 to 0.20 mg / mm ２ The basis weight is calculated from the weight and thickness of the sheet.

[0028] 2) Density The density of the aerosol-generating sheet is preferably 0.2 to 0.6 mg / mm ３ If the density is below the lower limit, the strength of the sheet will be insufficient. If the density is above the upper limit, the volatility of the components of the aerosol-generating sheet will decrease. From this perspective, the density is preferably 0.3 to 0.55 mg / mm ３ The density can be calculated from the weight and volume of the sheet.

[0029] 3) Thickness The thickness of the aerosol-generating sheet is preferably 0.1 to 1.0 mm. If the thickness is less than the lower limit, the sheet strength will be insufficient. If the thickness exceeds the upper limit, the volatility of the components of the aerosol-generating sheet will decrease.

[0030] 4) Moisture Release Rate The aerosol-generating sheet preferably has a moisture release rate of 0.15 (wt % / sec) or more. The moisture release rate is measured by the following method. i) The sheet is heated at 100°C to remove water, and a weight loss-time curve is obtained from the relationship between the weight loss rate and time. The weight loss rate (wt %) is defined as ((sheet weight before heating - sheet weight after heating) / sheet weight before heating) x 100. The sheet weight before heating is the initial weight of the sheet, and the sheet weight after heating is the sheet weight after the heating time has elapsed. ii) The moisture release rate is determined from the initial slope of the curve. The initial slope is, for example, the slope in the heating time range of 0 to 40 seconds, and in one embodiment, it is determined by dividing the weight loss rate (%) 40 seconds after the start of heating by the heating time.

[0031] When the moisture release rate is within this range, water evaporates quickly from the aerosol-generating sheet during preheating (after heating begins but before smoking begins). As a result, the user's sense of unpleasant heat from the smoke during smoking is suppressed. From this perspective, the moisture release rate is more preferably 0.18 (wt% / sec) or more. There is no upper limit, but in one embodiment, it is 0.5 (wt% / sec) or less.

[0032] 5) Structure The aerosol-generating sheet is preferably porous. It is preferable that the aerosol-generating sheet has a plurality of bubbles dispersed therein. The equivalent circle diameter of the bubbles is preferably about 10 to 200 μm. The equivalent circle diameter of the bubbles is calculated as follows: An aerosol-generating sheet with a width of 5 mm is cut in the thickness direction, and the cut surface is photographed using an optical microscope. The cross-sectional image is then binarized, and the three bubbles with the longest maximum length are selected. The areas of the selected bubbles are determined, and the equivalent circle diameters are calculated. The average of these is used as the equivalent circle diameter of the bubbles. The number of cut surfaces observed is preferably 1 to 5, more preferably 2 to 3. The equivalent circle diameters of the bubbles measured in each cut surface are preferably averaged to determine the equivalent circle diameter of the bubbles in the sheet. The sheet also preferably has through-holes penetrating both main surfaces. The equivalent circle diameter of the through-holes is about 10 to 400 μm. The equivalent circle diameter of the through-holes is calculated as follows: An observation area of ​​5 mm x 5 mm is selected on the main surface, and the area is photographed using an optical microscope. The planar image is binarized, and three through holes are selected in descending order of maximum length. The areas of the selected through holes are determined, and the equivalent circle diameters are calculated, and the average value is used as the equivalent circle diameter of the through holes. The number of observation areas is preferably 1 to 5, more preferably 2 to 3. The equivalent circle diameters of the through holes determined at each observation area are preferably averaged to determine the equivalent circle diameter of the through holes in the sheet. The number of bubbles or through holes is appropriately adjusted so as to achieve the basis weight or density.

[0033] The aerosol-generating sheet may have recesses on its surface. These recesses are formed by drying a wet sheet containing air bubbles. The aerosol-generating sheet may also be subjected to a surface treatment. Examples of surface treatments include embossing and crimping.

[0034] 2. Manufacturing Method The aerosol-generating sheet is preferably manufactured by a method comprising the steps of: whipping and stirring (A), (B), and (C) to prepare a mixture containing bubbles (first step); and forming the mixture into a sheet (second step).

[0035] (1) First Step (1-1) Preparation of Tobacco Extract In this step, the tobacco raw material described above is subjected to extraction to prepare a tobacco extract containing the tobacco extract as an active ingredient and a medium. Water is preferably used as the medium. The extraction temperature is not limited, but is preferably 60 to 100°C, and more preferably 70 to 90°C from the viewpoint of smoking taste. The extraction time is preferably 20 to 40 minutes.

[0036] (1-2) Mixing In this step, a mixture is prepared by mixing the components with whipping. Whipping is a process of stirring that incorporates bubbles. Whipping can be performed using a stirring device such as a food processor, homogenizer, mixer, kneader, kneader, extruder, ball mill, or refiner. The conditions for the whipping process can be determined appropriately depending on the state of the mixture, the type of stirring device, and the like. For example, the rotation speed is preferably 1,000 to 25,000 rpm, more preferably 2,000 to 20,000 rpm, and even more preferably 5,000 to 15,000 rpm, under no load.

[0037] At this time, it is preferable to also mix a medium. Water is preferred as the medium. The solid-liquid ratio (weight ratio) of the mixture is preferably 1:1 to 1:8. The solid-liquid ratio is the weight ratio of the medium to the total of all components other than the medium. While some components other than the medium are liquid at room temperature (e.g., glycerin), for convenience, in this disclosure, the weight ratio of the medium to the total of all components other than the medium is referred to as the "solid-liquid ratio." The weight of all components other than the medium is the dry weight (dry basis). If the solid-liquid ratio is below the above range, the water content is low, causing the mixture to dry prematurely during the drying process, making it difficult for bubbles, through-holes, and recesses to form. As a result, the loss of flavor components can be suppressed. From this perspective, the solid-liquid ratio (weight ratio) is more preferably 1:2 to 1:6. The weight ratios (C) / (B) and (B) / (D) of the mixture preferably satisfy the above ranges. The viscosity of the mixture is preferably 10,000 to 100,000 mPa·s. By setting the viscosity within the above range, whipping and stirring can be carried out appropriately.

[0038] (2) Step 2 Sheeting can be carried out by using a casting method. In the casting method, the mixture is cast on a substrate to form a wet sheet. The wet sheet is then dried to obtain a sheet. The drying temperature is preferably 50 to 100°C. The sheet obtained by this method is also called a "cast sheet."

[0039] 3. Flavor-generating composition (1) Composition The flavor-generating composition contains the aerosol-generating sheet or a material derived therefrom. The flavor-generating composition may also contain the aerosol-generating sheet and tobacco leaves. In this embodiment, the blending ratio (by weight) of the aerosol-generating sheet to the tobacco leaves may be aerosol-generating sheet:tobacco=40-80:20-60. By ensuring that the blending ratio of the aerosol-generating sheet to the tobacco leaves falls within this range, it is possible to reduce the fibrous odor while ensuring a sufficient amount of smoke, and to improve the intensity and persistence of the flavor.

[0040] (2) Leaf Tobacco 1) Definition In this specification, "leaf tobacco" includes harvested tobacco leaves; harvested tobacco leaves that have been deboned and separated to produce lamina, midribs, etc.; aged leaf tobacco that has undergone aging (including curing); and tobacco shreds that have been aged leaf tobacco, etc., shredded to a specified size.

[0041] 2) Tobacco Varieties A variety of tobacco varieties can be used. Examples include flue-cured, burley, oriental, native, other Nicotiana tabacum, and Nicotiana rustica varieties. These varieties can be used alone, or they can be blended in the process from leaf tobacco harvesting to shredding aged tobacco leaves to obtain the desired flavor. Details of the tobacco varieties are disclosed in "Encyclopedia of Tobacco," Tobacco Research Center, March 31, 2009.

[0042] 3) Tobacco Shreds from Leaf Tobacco Leaf tobacco may be tobacco shreds from leaf tobacco (hereinafter also referred to as leaf tobacco shreds). Leaf tobacco shreds are aged leaf tobacco or the like that has been shredded to a predetermined size. The aged leaf tobacco used for leaf tobacco shreds is not particularly limited, but examples thereof include tobacco that has been deboned and separated into lamina and midrib.

[0043] 4) Method for Preparing Leaf Tobacco Shreds The size and preparation method of leaf tobacco shreds are not particularly limited. One example is shredding aged leaf tobacco to a width of 0.3 mm or more and 2.0 mm or less and a length of 3 mm or more and 30 mm or less. When considered as a flavor source, various shred widths can be set by taking into account factors such as thermal conductivity. Leaf tobacco shreds of this size are preferable for filling the wrapper, as described below. Furthermore, using two or more types of leaf tobacco with different shred widths within the range of 0.3 to 2.0 mm is preferable from the perspective of widely varying the timing of the puff at which the flavor level is perceived. For example, a first leaf tobacco with a shred width of 0.3 to 1.2 mm and a second leaf tobacco with a shred width of 0.8 to 1.7 mm (the second leaf tobacco having a larger shred width than the first leaf tobacco) can be used. A smaller shred width increases the surface area per unit mass, resulting in higher thermal conduction efficiency. Higher thermal conduction efficiency allows the tobacco filler to be heated in a shorter time. On the other hand, by increasing the pitch, the surface area per unit mass becomes smaller and the heat conduction efficiency becomes lower, so that it becomes possible to heat the tobacco filler for a longer period of time.

[0044] 4. Smoking Articles The aerosol-generating sheet of this embodiment is useful as a flavor source (filler) for combustion-type and non-combustion-type heated smoking articles, and is suitable for non-combustion-type heated smoking articles. Figure 3 shows one embodiment of a non-combustion-type heated smoking article. As shown in the figure, the non-combustion-type heated smoking article 20 comprises a tobacco segment 20A, a cylindrical cooling section 20B having perforations on its circumference, and a filter section 20C. The non-combustion-type heated smoking article 20 may also comprise other components. The axial length of the non-combustion-type heated smoking article 20 is not limited, but is preferably 40 to 90 mm, more preferably 50 to 75 mm, and even more preferably 50 to 60 mm or less. The circumferential length of the non-combustion-type heated smoking article 20 is preferably 16 to 25 mm, more preferably 20 to 24 mm, and even more preferably 21 to 23 mm. For example, the length of the tobacco segment 20A may be 20 mm, the length of the cooling section 20B may be 20 mm, and the length of the filter section 20C may be 7 mm. The lengths of these individual components may be changed as appropriate depending on manufacturing suitability, required quality, etc. While Fig. 1 shows an embodiment in which the first segment 25 is provided, it is also possible to provide only the second segment 26 downstream of the cooling section 20B without providing the first segment 25.

[0045] 1) Tobacco Segment 20A The tobacco filler 21 in the tobacco segment 20A contains the aerosol-generating sheet or a flavor-generating composition containing the aerosol-generating sheet. The method for filling the aerosol-generating sheet into the wrapper 22 is not particularly limited. For example, the aerosol-generating sheet may be wrapped in the wrapper 22, or may be filled by folding the aerosol-generating sheet into the tubular wrapper 22. When the aerosol-generating sheet is processed into a strand shape and used, it may be filled so that its longitudinal direction is in any direction within the wrapper 22, or it may be filled so that it is aligned with the axial direction of the tobacco segment 20A or a direction perpendicular to the axial direction. The aerosol-generating sheet may also be processed into shreds for use. When the tobacco segment 20A is heated, the tobacco components, aerosol source, and water contained in the tobacco filler 21 are vaporized and available for inhalation.

[0046] When the aerosol-generating sheet is processed into strands or shreds, the size and preparation method of the strands or shreds are not particularly limited. One example is an aerosol-generating sheet processed to have a width of 0.3 to 2.0 mm. Strands and shreds of this size are suitable for filling a wrapper. Furthermore, from the viewpoint of suppressing delay in the development of the tobacco sheet's inherent flavor, the width of the aerosol-generating sheet strands and substrate is preferably 0.3 to 1.0 mm. Furthermore, when considering the aerosol-generating sheet as not only a vapor source but also a hydrophilic flavor source, it is preferable to use various cut widths taking into account factors such as thermal conductivity. Furthermore, when the aerosol-generating sheet is processed into strands, the length is preferably 3 mm or more and 30 mm or less.

[0047] The packing density of the aerosol-generating sheet or flavor-generating composition in the tobacco packing 21 is 0.25 to 0.60 g / cm ３ It is preferable that the packing density is 0.25 g / cm ３ By setting the packing density to 0.60 g / cm or more, sufficient winding hardness can be ensured. ３ By satisfying the above condition, the amount of the aerosol-generating sheet or flavor-generating composition to be filled can be reduced, thereby reducing production costs.

[0048] 2) Cooling Section 20B The cooling section 20B is preferably configured as a tubular member. The tubular member may be, for example, a cardboard tube 23 formed by processing cardboard into a cylindrical shape. The cooling section 20B may also be formed from a sheet of thin material that is wrinkled and then pleated, gathered, or folded to form a channel. Examples of such a material include sheet materials selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, cellulose acetate, and aluminum foil. The total surface area of ​​the cooling section 20B is appropriately adjusted taking cooling efficiency into consideration, but may be, for example, 300 to 1000 mm ２ / mm. The cooling section 20B is preferably provided with perforations 24. The presence of the perforations 24 allows outside air to be introduced into the cooling section 20B during inhalation. As a result, the vaporized aerosol components generated by heating the tobacco segment 20A come into contact with the outside air, their temperature drops, and they liquefy, forming an aerosol. The diameter (distance) of the perforations 24 is not particularly limited, but may be, for example, 0.5 to 1.5 mm. The number of perforations 24 is not particularly limited, and may be one or two or more. For example, a plurality of perforations 24 may be provided around the circumference of the cooling section 20B.

[0049] The cooling portion 20B may be rod-shaped with an axial length of, for example, 7 to 28 mm. For example, the axial length of the cooling portion 20B may be 18 mm. The cooling portion 20B may have a substantially circular axial cross-sectional shape and a diameter of 5 to 10 mm. For example, the diameter of the cooling portion may be approximately 7 mm.

[0050] 3) Filter portion 20C The configuration of the filter portion 20C is not particularly limited, and may be composed of one or more packed layers. The outside of the packed layer may be wrapped with one or more sheets of wrapping paper. The airflow resistance of the filter portion 20C can be appropriately changed depending on the amount, material, etc. of the filter packing filled in the filter portion 20C. For example, when the filter packing is cellulose acetate fiber, the airflow resistance can be increased by increasing the amount of cellulose acetate fiber filled in the filter portion 20C. When the filter packing is cellulose acetate fiber, the packing density of the cellulose acetate fiber is 0.13 to 0.18 g / cm. ３ The airflow resistance is a value measured using an airflow resistance measuring device (product name: SODIMAX, manufactured by SODIM).

[0051] The circumferential length of the filter part 20C is not particularly limited, but is preferably 16 to 25 mm, more preferably 20 to 24 mm, and even more preferably 21 to 23 mm. The length of the filter part 20C in the axial direction (horizontal direction in the drawing) can be selected from 4 to 10 mm, and the airflow resistance thereof is selected from 15 to 60 mmH. ２The axial length of the filter portion 20C is preferably 5 to 9 mm, more preferably 6 to 8 mm. The cross-sectional shape of the filter portion 20C is not particularly limited, but may be, for example, circular, elliptical, polygonal, etc. Furthermore, a destructible capsule containing a fragrance, fragrance beads, or fragrance may be directly added to the filter portion 20C.

[0052] The filter portion 20C may include a center hole portion as the first segment 25. The center hole portion is composed of a first filling layer 25a having one or more hollow portions and an inner plug wrapper (inner wrapping paper) 25b that covers the filling layer. The center hole portion functions to increase the strength of the mouthpiece portion. The center hole portion may not have an inner plug wrapper 25b and its shape may be maintained by thermoforming. The filter portion 20C may include a second segment 26. The second segment 26 is composed of a second filling layer 26a and an inner plug wrapper (inner wrapping paper) 26b that covers the filling layer. The second filling layer 26a may be, for example, a rod with an inner diameter of 5.0 to 1.0 mm, densely packed with cellulose acetate fibers and hardened with 6 to 20 wt.% of a plasticizer containing triacetin added to the cellulose acetate. Due to the high fiber packing density of the second filling layer, during inhalation, air and aerosol flow only through the hollow portions, with almost no flow within the second filling layer. Since the second filling layer inside the center hole portion is a fiber filling layer, the feel from the outside during use is less likely to cause discomfort to the user.

[0053] The first filling layer 25a and the second filling layer 26a are connected by an outer plug wrapper (outer wrapping paper) 27. The outer plug wrapper 27 can be, for example, a cylindrical piece of paper. The tobacco segment 20A, the cooling section 20B, and the connected first filling layer 25a and second filling layer 26a are connected by a mouthpiece lining paper 28. These connections can be made, for example, by applying a vinyl acetate glue or other adhesive to the inner surface of the mouthpiece lining paper 28 and wrapping the three components. These components may also be connected in multiple layers using multiple lining papers.

[0054] A combination of a non-combustion heated smoking article and a heating device for generating aerosol is also referred to as a non-combustion heated smoking system. An example of such a system is shown in Fig. 4. In the figure, the non-combustion heated smoking system includes a non-combustion heated smoking article 20 and a heating device 10 that heats a tobacco segment 20A from the outside.

[0055] The heating device 10 comprises a body 11, a heater 12, a metal tube 13, a battery unit 14, and a control unit 15. The body 11 has a cylindrical recess 16, and the heater 12 and metal tube 13 are disposed at positions corresponding to the tobacco segment 20A to be inserted therein. The heater 12 may be an electric resistance heater, and is heated by power supplied from the battery unit 14 in response to instructions from a temperature-controlling control unit 15. The heat generated by the heater 12 is transferred to the tobacco segment 20A through the metal tube 13, which has high thermal conductivity. While the figure shows a configuration in which the heating device 10 heats the tobacco segment 20A from the outside, it may also heat from the inside. The heating temperature of the heating device 10 is not particularly limited, but is preferably 400°C or less, more preferably 150 to 400°C, and even more preferably 200 to 350°C. The heating temperature refers to the temperature of the heater in the heating device 10. Alternatively, a susceptor may be disposed within the tobacco segment 20A, and the tobacco segment 20A may be heated by an induction heating method.

[0056] The following are embodiments: Aspect 1: A paper sheet comprising: (A) 15 to 50% by weight of tobacco extract; (B) 6 to 20% by weight of a binder; and (C) 15 to 60% by weight of an aerosol source, and having a basis weight of 0.10 to 0.25 mg / mm ２ Aspect 2: An aerosol-generating sheet having a density of 0.2 to 0.6 mg / mm ３Aspect 3: The sheet according to Aspect 1 or 2, having a plurality of dispersed air bubbles therein or having through-holes penetrating both major surfaces. Aspect 4: The sheet according to any one of Aspects 1 to 3, wherein the binder is selected from the group consisting of cellulose derivatives, xanthan gum, guar gum, carrageenan, locust bean gum, alginic acid, sodium alginate, starch, water-soluble soy polysaccharides, and combinations thereof. Aspect 5: The sheet according to any one of Aspects 1 to 4, wherein the cellulose derivative comprises a hydroxyalkyl alkyl cellulose, a carboxyalkyl cellulose, or an alkyl cellulose. Aspect 6: The sheet according to Aspect 5, wherein the cellulose derivative comprises hydroxypropyl methyl cellulose (HPMC) and carboxymethyl cellulose (CMC), and the weight ratio of HPMC to CMC is 0.5:1 to 2:1. Aspect 7 An aerosol-generating sheet according to any one of Aspects 1 to 6, further comprising (D) fibers, wherein the weight ratio between the (B) binder and the (D) fiber component satisfies the following: 0.30≦(B) / (D)≦1.2. Aspect 8 An aerosol-generating sheet according to any one of Aspects 1 to 7, wherein the weight ratio between the (C) aerosol source and the (B) binder satisfies the following: 2.0≦(C) / (B)≦4.0. Aspect 9 An aerosol-generating sheet according to any one of Aspects 1 to 8, wherein the moisture release rate calculated by the following method: 1) heating the sheet at 100°C to remove water, and obtaining a weight loss-time curve from the relationship between the weight loss rate and time, and 2) calculating the moisture release rate from the initial slope of the curve is 0.15 (wt % / sec) or more. Aspect 10 An aerosol-generating composition comprising the aerosol-generating sheet according to any one of Aspects 1 to 9, and tobacco leaves. Aspect 11. A non-combustion heated smoking article comprising a tobacco segment comprising the aerosol-generating sheet according to any one of Aspects 1 to 9, or the flavor generating composition according to Aspect 10. Aspect 12. A non-combustion heated smoking system comprising the non-combustion heated smoking article according to Aspect 11 and a heating device.Aspect 13 A method for producing an aerosol-generating sheet according to any one of Aspects 1 to 9, comprising the steps of: whipping and stirring (A), (B), and (C) to prepare a mixture containing gas bubbles therein; and forming the mixture into a sheet. Aspect 14 The method according to Aspect 13, wherein the solid-liquid ratio of the mixture is 1:1 to 1:8, and the weight ratio (C) / (B) in the mixture satisfies the following: 2.0≦(C) / (B)≦4.0.

[0057] Example 1 Water was added to Orient (Izmir) tobacco leaves, and extraction was carried out at 80°C for 1 hour to obtain a tobacco extract (Izmir water extract). The amount of water added was such that (amount of water contained in tobacco leaves + amount of water added) / tobacco leaf dry weight = 5. Specifically, the amount of water was 4.3 times the wet basis weight of the tobacco leaves. Water was added to Brazilian flue-cured tobacco leaves, and extraction was carried out at room temperature for 1 hour to obtain a tobacco extract (BRFCV water extract). The amount of water added was such that (amount of water contained in tobacco leaves + amount of water added) / tobacco leaf dry weight = 5. Specifically, the amount of water was 4.3 times the wet basis weight of the tobacco leaves.

[0058] Hydroxypropylmethylcellulose (Metolose N-100, manufactured by Shin-Etsu Chemical Co., Ltd.) and carboxymethylcellulose (F350HC, manufactured by Nippon Paper Industries Co., Ltd.) were prepared as binders. Citrus-derived dietary fiber (Helbasel, manufactured by Sumitomo Pharma Food & Chemical Co., Ltd.) was prepared as fiber. Glycerin was prepared as an aerosol source.

[0059] The components were whipped and stirred under the following conditions to prepare a mixture (slurry) containing bubbles, with the composition shown in Table 1. The percentages in the table represent weight percent. Model number: AHG-160A (As One Corporation) Shaft generator used: HT1018 Capacity: 50 g Rotation speed: 10,000 rpm Processing time: 10 minutes Temperature: 20°C (room temperature)

[0060] The slurry was then cast onto a stainless steel plate to a thickness of 1.5 mm and dried at 80°C to produce a porous aerosol-generating sheet.２ , thickness is 0.3 mm, density is 0.5 mg / mm ３ It was.

[0061] Example 2 An aerosol-generating sheet was produced in the same manner as in Example 1, except that the composition was changed as shown in Table 1.

[0062] [Comparative Example 1] The components shown in Table 1 were mixed to prepare a wet powder (mixture) with a moisture content of 20.30% by weight. The wet powder was sandwiched between two substrates and compressed using a rolling roll (manufactured by Yuri Roll Machine Co., Ltd.). The substrates were peeled off, and the wet sheet was dried at 80°C to produce a laminate sheet. The basis weight was 0.37 mg / mm ２ , thickness is 0.3 mm, density is 1.2 mg / mm ３ It was.

[0063]

[0064] [Measurement of component volatilization rate from sheet] The sheets shown in Table 2 were heated to 200°C using an IR moisture meter, and the change in weight of the sheet was measured. The weight loss was calculated as follows: Weight loss (wt%) = ((sheet weight before heating - sheet weight after heating) / sheet weight before heating) x 100 The heat irradiation area is the area of ​​the sample facing the IR moisture meter (heater).

[0065]

[0066] The results are shown in Figure 1. Comparing No. 1 and No. 2, it is clear that the porous sheet has a greater weight loss rate when the volumes are the same. This confirms that the No. 2 sheet has a higher volatility of components from the sheet than the No. 1 sheet. Comparing No. 1 and No. 3, it is clear that the porous sheet has a greater weight loss rate when the weights are the same. However, it is clear that the difference is smaller than when the volumes are the same. Furthermore, although the No. 3 sheet is thicker than the No. 1 sheet, it also has a greater weight loss rate, confirming that the No. 3 sheet has a higher volatility of components from the sheet.

[0067] [Measurement of Moisture Release Rate from Sheets] Sheets No. 1 and No. 2 were heated to 100°C using an IR moisture meter, and the weight change of the sheets was measured to calculate the moisture release rate. The reduction rate was calculated as follows: Reduction rate (wt%) = ((Sheet weight before heating - Sheet weight after heating) / Sheet weight before heating) x 100

[0068] The results are shown in Table 3 and FIG.

[0069] Since the component that volatilizes at 100°C is water, this result indicates the rate at which water volatilizes. It was revealed that the No. 2 sheet has a high rate of water volatilization. Because moisture volatilizes quickly from the sheet, the heat of the smoke can be reduced. In other words, because moisture volatilizes during the preheating of the heated smoking article, the heat of the smoke can be reduced.

[0070] REFERENCE SIGNS LIST 10 Heating device 11 Body 12 Heater 13 Metal tube 14 Battery unit 15 Control unit 16 Recess 17 Ventilation hole 20 Non-combustion heating smoking article 20A Tobacco segment 20B Cooling section 20C Filter section 21 Tobacco filler 22 Cigarette paper 23 Paper tube 24 Perforation 25 First segment 25a First filling layer 25b Inner plug wrapper 26 Second segment 26a Second filling layer 26b Inner plug wrapper 27 Outer plug wrapper 28 Lining paper

Claims

1. (A) 15 to 50% by weight of a tobacco extract; (B) 6 to 20 wt. % of a binder; (C) 15 to 60% by weight of an aerosol source; Basis weight: 0.10 to 0.25 mg / mm ２ is Aerosol generating sheet.

2. Density: 0.2 to 0.6 mg / mm ３ The sheet according to claim 1 ,

3. 3. The sheet according to claim 1, having a plurality of dispersed bubbles therein or having through-holes passing through both main surfaces.

4. 3. The sheet of claim 1 or 2, wherein the binder is selected from the group consisting of cellulose derivatives, xanthan gum, guar gum, carrageenan, locust bean gum, alginic acid, sodium alginate, starch, water-soluble soy polysaccharides, and combinations thereof.

5. The sheet of claim 4 , wherein the cellulose derivative comprises a hydroxyalkyl alkyl cellulose, a carboxyalkyl cellulose, or an alkyl cellulose.

6. 6. The sheet according to claim 5, wherein the cellulose derivative comprises hydroxypropyl methylcellulose (HPMC) and carboxymethyl cellulose (CMC), and the weight ratio of HPMC to CMC is 0.5:1 to 2:

1.

7. (D) further comprising fibers; The weight ratio of the (B) binder to the (D) fiber component satisfies the following: 0.30≦(B) / (D)≦1.2 3. The aerosol-generating sheet according to claim 1 or 2.

8. The weight ratio of the aerosol source (C) to the binder (B) satisfies the following: 2.0≦(C) / (B)≦4.0 3. The aerosol-generating sheet according to claim 1 or 2.

9. The following methods: 1) The sheet is heated at 100° C. to remove water, and a weight loss-time curve is obtained from the relationship between the weight loss rate and time. 2) The water release rate is calculated from the initial slope of the curve. The moisture release rate calculated by is 0.15 (wt% / sec) or more.

3. The aerosol-generating sheet according to claim 1 or 2.

10. The aerosol-generating sheet according to claim 1; Tobacco leaves, 1. A flavor generating composition comprising:

11. A non-combustion heated smoking article comprising a tobacco segment containing the aerosol-generating sheet of claim 1 or the flavor generating composition of claim 10.

12. A non-combustion heating smoking system comprising the non-combustion heating smoking article according to claim 11 and a heating device.

13. a step of whipping and stirring (A), (B), and (C) to prepare a mixture containing bubbles; and forming the mixture into a sheet; 3. The method for producing an aerosol-generating sheet according to claim 1 or 2, comprising:

14. The solid-liquid ratio of the mixture is 1:1 to 1:8; The weight ratio (C) / (B) in the mixture satisfies the following: 2.0≦(C) / (B)≦4.0 The method of claim 13.