Inorganic filler-containing sheet

Abstract

A tobacco rod comprising: a tobacco filler containing a tobacco material and an inorganic filler-containing sheet containing an inorganic filler having a BET specific surface area of 35 m2 / g or less, a binder, and a plasticizer, the inorganic filler-containing sheet containing the inorganic filler in an amount of 90% by mass or more and containing the binder and the plasticizer in an amount of 10% by mass or less in total; and a cigarette paper for wrapping the tobacco filler.

Description

Inorganic filler-containing sheet

[0001] The present invention relates to a technique relating to an inorganic filler-containing sheet.

[0002] Tobacco substitute sheets are known as materials that partially replace the tobacco material in tobacco products without containing any tobacco material. "Tobacco material" refers to a tobacco flavor source that can be blended into tobacco products. For example, Patent Document 1 discloses that tobacco substitute sheets contain an inorganic filler such as calcium carbonate, a binder, and an aerosol generating means such as glycerin. In this specification, tobacco substitute sheets that contain an inorganic filler as the main material are referred to as "inorganic filler-containing sheets."

[0003] Tobacco substitute sheets are used as a substitute for tobacco materials and can reduce the amount of tobacco materials contained in tobacco products. Therefore, using tobacco substitute sheets in tobacco products can dilute the tobacco flavor, reduce the amount of harmful components derived from tobacco materials, and reduce the cost of tobacco products.

[0004] International Publication No. 2012 / 110819

[0005] An object of the present invention is to provide an inorganic filler-containing sheet having a high content of inorganic filler.

[0006] According to one aspect, 35 m ２ The present invention provides a tobacco rod comprising: an inorganic filler-containing sheet containing an inorganic filler having a BET specific surface area of ​​10 m / g or less, a binder, and a plasticizer, the inorganic filler being contained in an amount of 90% by mass or more and the binder and the plasticizer being contained in a total amount of 10% by mass or less; a tobacco material; and a cigarette paper for wrapping the tobacco filler. ２

[0013] According to yet another aspect, there is provided a tobacco rod according to any of the above aspects, wherein the inorganic filler-containing sheet contains cellulose as the binder. According to yet another aspect, there is provided a flavored product article, comprising the tobacco rod according to any of the above aspects and a filter disposed downstream of the tobacco rod.

[0007] According to yet another aspect, 35 m ２ An inorganic filler-containing sheet is provided, which comprises an inorganic filler having a BET specific surface area of ​​10 m / g or less, a binder, and a plasticizer, the inorganic filler being contained in an amount of 90% by mass or more, and the binder and the plasticizer being contained in a total amount of 10% by mass or less. ２ / g or less. According to yet another aspect, there is provided an inorganic filler-containing sheet according to any of the above aspects, wherein the inorganic filler-containing sheet contains cellulose as the binder. According to yet another aspect, there is provided a tobacco product comprising the inorganic filler-containing sheet according to any of the above aspects and a tobacco material. According to yet another aspect, there is provided a tobacco substitute product comprising the inorganic filler-containing sheet according to any of the above aspects and a tobacco substitute selected from the group consisting of a flavor source other than tobacco flavor and nicotine.

[0008] According to yet another aspect, there is provided a flavor rod including the inorganic filler-containing sheet according to any of the above aspects, a flavor filler including a flavor source, and a wrapping paper for wrapping the flavor filler. According to yet another aspect, there is provided a flavor product including the above-mentioned flavor rod and a filter disposed downstream of the flavor rod.

[0009] According to the present invention, it is possible to provide an inorganic filler-containing sheet having a high content of inorganic filler.

[0010] FIG. 1 is a cross-sectional view showing an example of a cigarette. FIG. 2A is a schematic front view showing an example of an aerosol generating device. FIG. 2B is a schematic top view of the aerosol generating device shown in FIG. 2A. FIG. 3 is a schematic side cross-sectional view showing an example of a tobacco stick. FIG. 4 is a cross-sectional view taken along line III-III of the aerosol generating device shown in FIG. 2B.

[0011] Hereinafter, the present invention will be described in detail. However, the following description is for the purpose of explaining the present invention and is not intended to limit the present invention. The embodiments described below are more specific embodiments of any of the above aspects. The matters described below can be incorporated into each of the above aspects alone or in combination.

[0012] <1. Inorganic filler-containing sheet> The present inventors focused on the fact that since the inorganic filler contained in the tobacco substitute sheet is incombustible, there is no generation of products due to combustion or heating and it does not affect the tobacco flavor of the tobacco product, and considered producing a tobacco substitute sheet having a high content of inorganic filler. When the content of the inorganic filler in the tobacco substitute sheet is increased, the content of components other than the inorganic filler decreases. When the content of the binder and glycerin, which are components other than the inorganic filler, decreases, it becomes impossible to form the tobacco substitute sheet, or even if it can be formed, the strength and flexibility of the sheet become insufficient. Under such circumstances, the present inventors found that depending on the physical properties of the inorganic filler, there are cases where a tobacco substitute sheet can be formed and cases where it cannot be formed even when the same amount of binder and glycerin are used. That is, the present inventors found that when a tobacco substitute sheet is produced using an inorganic filler having specific physical properties, it is possible to produce a tobacco substitute sheet having a higher content of inorganic filler, and thus completed the present invention.

[0013] That is, the inorganic filler-containing sheet includes an inorganic filler having a BET specific surface area of 35 m ２ / g or less, a binder, and a plasticizer, contains the inorganic filler in an amount of 90% by mass or more, and contains the binder and the plasticizer in a total amount of 10% by mass or less. According to a preferred embodiment, the BET specific surface area of the inorganic filler is 10 m ２ / g or less. According to another preferred aspect, the inorganic filler-containing sheet comprises cellulose as a binder. The inorganic filler-containing sheet can be used in tobacco products or tobacco substitute products as described herein. The inorganic filler-containing sheet has a thickness of, for example, 0.01 to 1 mm, preferably 0.05 to 0.3 mm.

[0014] The inorganic filler-containing sheet is (i) 35 m ２ The porous support can be produced by mixing raw materials containing (i) an inorganic filler having a BET specific surface area of ​​1 / g or less, (ii) a binder, and (iii) a plasticizer, spreading the resulting mixture on a substrate into a sheet, and drying the mixture.

[0015] Each component of the inorganic filler-containing sheet will be described below: The inorganic filler-containing sheet is a tobacco substitute sheet and does not contain tobacco materials.

[0016] (i) Inorganic Filler The inorganic filler serves as a main material constituting the sheet. The inorganic filler usually has a particulate shape. The inorganic filler is non-flammable. Examples of the inorganic filler include calcium carbonate, silica, and alumina. The inorganic filler is preferably calcium carbonate. The inorganic filler is more preferably calcium carbonate particles.

[0017] The amount of inorganic filler in the inorganic filler-containing sheet is 90% by mass or more. The amount of inorganic filler in the inorganic filler-containing sheet is, for example, 90% by mass or more but less than 100% by mass, preferably 90 to 95% by mass. When the amount of inorganic filler in the inorganic filler-containing sheet is 90% by mass or more, the total content of binder and plasticizer can be reduced.

[0018] Inorganic filler is 35m ２ The inorganic filler has a BET specific surface area of ​​0.1 to 35 m / g or less. ２ / g, preferably 1 to 35 m ２ According to a preferred embodiment, the inorganic filler has a BET specific surface area of ​​10 m ２ In a preferred embodiment, the inorganic filler has a BET specific surface area of, for example, 0.1 to 10 m ２ / g, preferably 1 to 7 m２ The larger the BET specific surface area of ​​the inorganic filler, the smaller the contact area between the inorganic filler and the binder, and therefore a larger amount of binder is required to form a sheet.

[0019] The BET specific surface area refers to a value measured according to the constant volume method. Specific measurement conditions are as follows: Apparatus: Quadruple-type specific surface area / pore distribution measuring apparatus, NOVA-TOUCH model (manufactured by Quantachrome) Measurement content: Adsorption isotherm (horizontal axis: relative pressure, vertical axis: amount of adsorbed gas) Gas used: Nitrogen gas Refrigerant (temperature): Liquid nitrogen (77.35 K) Pretreatment conditions: Vacuum degassing for 6 hours under heating at 110°C Measurement relative pressure: 0.005≦P / P ０ ≦0.995 Analysis method: BET multi-point method 0.05≦P / P ０ Analyze isotherm data for ≦0.3.

[0020] The inorganic filler is, for example, 0.3 cm ３ / g or less, preferably 0.1 cm ３ The inorganic filler preferably has a total pore volume of 0 to 0.3 cm ３ / g, more preferably 0 to 0.1 cm ３ / g, more preferably 0 to 0.03 cm ３ When the inorganic filler has a large total pore volume, the binder tends to easily enter the pores, making it difficult for the binder to function as a binder, and the amount of binder required to form a sheet tends to increase.

[0021] The total pore volume refers to a value measured according to the one-point total pore volume method. Specifically, the total pore volume is calculated by assuming that the pores are filled with liquid nitrogen and the relative pressure (P / P ０ ) is at its maximum. Specific measurement conditions are as follows: Apparatus: Quadruple-type specific surface area / pore distribution measuring apparatus, NOVA-TOUCH model (Quantachrome) Gas used: Nitrogen gas Refrigerant (temperature): Liquid nitrogen (77.35 K) Pretreatment conditions: Vacuum degassing for 6 hours while heating at 110°C.

[0022] The inorganic filler has an average pore diameter of, for example, 40 nm or less, preferably 20 nm or less. The inorganic filler preferably has an average pore diameter of 0 to 40 nm or less, more preferably 0 to 20 nm. If the inorganic filler has a large average pore diameter, the binder tends to easily enter the pores, making it difficult for the binder to function as a binder, and the amount of binder required to form a sheet tends to increase.

[0023] Assuming that the pores have a cylindrical shape, the volume V of a cylinder having a diameter D and a length (height) L is expressed by the following formula 1, and the side surface area S of the cylinder is expressed by the following formula 2. Therefore, the average pore diameter D ａｖｅ can be calculated by the following formula 3: Formula 1: V = πD ２ L / 4 Formula 2: S=πDL Formula 3: D ａｖｅ = 4V ｔｏｔａｌ / S ＢＥＴ V ｔｏｔａｌ : total pore volume S ＢＥＴ : BET specific surface area.

[0024] The inorganic filler has an average particle size D50 of, for example, 1 to 100 μm, preferably 2 to 20 μm. The "average particle size D50" refers to the particle size at which the volume-based cumulative 50% particle size distribution is measured by a laser diffraction / scattering method, with particle size plotted on the horizontal axis and volume-based cumulative % plotted on the vertical axis. Measurements can be performed according to the details described in the Examples.

[0025] The inorganic filler has an aspect ratio (major axis / minor axis) of, for example, 1 to 10, preferably 1 to 2. The aspect ratio can be determined by measuring the shapes of a total of 10,050 particles using an apparatus that analyzes particle shapes by image processing (particle shape image analyzer) and calculating the average value. The measurement can be performed according to the details described in the examples.

[0026] The inorganic filler may be, for example, 0.1 to 5 g / cm ３ , preferably 0.5 to 2 g / cm ３ The apparent density can be measured by mercury intrusion porosimetry. The measurement can be carried out according to the details described in the Examples.

[0027] (ii) Binder The binder serves to bind the inorganic fillers together and form them into a sheet shape. As the binder, binders conventionally used in tobacco substitute sheets can be used. Examples of binders include the following:

[0028] Celluloses: cellulose, methylcellulose, carboxymethylcellulose, hydroxypropyl cellulose, hydroxyethyl cellulose, cellulose ether Gums: gellan gum, gum arabic, guar gum, xanthan gum, gum ghatti, tragacanth gum, karaya gum, locust bean gum, acacia gum, quince seed gum, pullulan gum, mannan gum Gels: agar, agarose, carrageenan, gelatin, starch, fucoidan, furcellaran, pectin Alginates: ammonium alginate, sodium alginate, sodium calcium alginate, calcium ammonium alginate, potassium alginate, magnesium alginate, triethanolamine alginate, propylene glycol alginate Inorganic binders: bentonite One type of binder may be used, or multiple types may be used in combination.

[0029] According to a preferred embodiment, the inorganic filler-containing sheet contains cellulose as a binder. When the inorganic filler-containing sheet contains cellulose, the amount of cellulose in the inorganic filler-containing sheet is, for example, 10% by mass or less, preferably 1 to 5% by mass, and more preferably 1 to 3% by mass. When the inorganic filler-containing sheet contains cellulose, the cellulose fibers entangle with each other, holding the sheet components and thereby contributing to maintaining the sheet shape. As described above, in order to form a sheet with a small amount of binder, a small BET specific surface area of ​​the inorganic filler is desirable. Even if the BET specific surface area of ​​the inorganic filler is relatively large and it is difficult to form a sheet with a small amount of binder, the inclusion of cellulose in the inorganic filler-containing sheet is thought to resolve this forming difficulty by allowing the cellulose fibers to entangle with the sheet components and thereby maintaining the sheet shape. Cellulose may be used in combination with other binders or alone without other binders. For example, the inorganic filler-containing sheet may further contain gellan gum or carboxymethyl cellulose as a binder in addition to cellulose.

[0030] Of course, the inorganic filler-containing sheet does not necessarily have to contain cellulose. For example, when the BET specific surface area of ​​the inorganic filler is 10 m ２ / g or less, the inorganic filler-containing sheet preferably contains gellan gum or carboxymethyl cellulose as a binder. ２ / g or less, the binder is more preferably gellan gum or carboxymethyl cellulose.

[0031] The amount of binder in the inorganic filler-containing sheet is, for example, 10% by mass or less. The amount of binder in the inorganic filler-containing sheet is preferably more than 0% by mass and 10% by mass or less, more preferably 1 to 8% by mass, and even more preferably 2 to 5% by mass. When multiple types of binders are used, the amount of binder in the inorganic filler-containing sheet refers to the total amount of binders.

[0032] (iii) Plasticizer The plasticizer serves to impart flexibility and elasticity to the sheet. As the plasticizer, any plasticizer conventionally used in tobacco substitute sheets can be used. Examples of plasticizers include the following:

[0033] Polyhydric alcohols: glycerin, propylene glycol, triethylene glycol, polyethylene glycol, sorbitol, maltitol Esters: triethyl citrate, triacetin High-boiling hydrocarbons Hydroxy acids: lactic acid The plasticizer is preferably glycerin.

[0034] The amount of plasticizer in the inorganic filler-containing sheet is, for example, 10% by mass or less, preferably more than 0% by mass and 10% by mass or less, more preferably 1 to 8% by mass, and even more preferably 2 to 7% by mass.

[0035] The inorganic filler-containing sheet contains a binder and a plasticizer in a total amount of 10% by mass or less. The total amount of binder and plasticizer in the inorganic filler-containing sheet is, for example, more than 0% by mass and 10% by mass or less, preferably 2 to 10% by mass, and more preferably 4 to 10% by mass.

[0036] (iv) Other Components The inorganic filler-containing sheet may contain additional components as needed. The inorganic filler-containing sheet may contain, for example, a fragrance, a colorant, a fragrance retainer, a catalyst, a moisturizer, a temperature control agent, a coating agent, etc. The additional components may be incorporated into the sheet by mixing them with other raw materials of the inorganic filler-containing sheet, or may be added to the sheet after it has been formed and adsorbed onto the surface of the sheet.

[0037] As described above, the inorganic filler-containing sheet is a tobacco substitute sheet and does not contain tobacco materials. As used herein, the term "tobacco material" refers to a tobacco flavor source that can be incorporated into tobacco products such as combustion-type or heated flavor inhalers.

[0038] For example, the tobacco material may be tobacco shreds that are ready to be incorporated into tobacco products such as combustion-type or heat-type flavor inhalers. "Tobacco shreds that are ready to be incorporated into tobacco products" refers to tobacco shreds that have undergone various processing steps, such as a drying process on a farm, a long-term aging process of one to several years at a raw material factory, and then blending and cutting at a manufacturing factory, and are ready to be incorporated into tobacco products.

[0039] Alternatively, the tobacco material may be reconstituted tobacco obtained by processing tobacco waste, such as leaf waste, shredded waste, backbone waste, and fine powder, generated during factory operations, into a reusable form. Examples of reconstituted tobacco include tobacco sheets and tobacco granules.

[0040] "Sheet tobacco" refers to a molded product obtained by molding raw materials including tobacco shreds into a sheet shape. Sheet tobacco can have a thickness of, for example, 0.05 to 0.30 mm. After molding, the sheet tobacco may be cut into a size suitable for use as a tobacco filler (for example, a size equivalent to that of regular tobacco shreds), and the resulting cut product is also included in the category of sheet tobacco. In this case, the sheet tobacco can be cut into a size of, for example, 1 mm x 10 mm. Sheet tobacco can be molded by known methods such as papermaking, casting, and rolling.

[0041] "Tobacco granules" refer to molded articles obtained by molding raw materials including tobacco shreds into a granular shape. Tobacco granules can have any shape, such as spherical or short cylinder. If spherical, the tobacco granules can have an average particle size (D50) of, for example, 0.2 to 1.0 mm, and if short cylinder, the tobacco granules can have an equivalent sphere diameter of, for example, 0.2 to 2.0 mm. Tobacco granules can be molded by known methods such as extrusion granulation, fluidized bed granulation, and spray drying.

[0042] (Effects) By including an inorganic filler having specific physical properties, the inorganic filler-containing sheet described above can increase the inorganic filler content and reduce the total content of binder and plasticizer. Because the inorganic filler is non-flammable, no products are generated by combustion or heating. Therefore, when incorporated into a tobacco product, the inorganic filler-containing sheet described above is unlikely to affect the tobacco flavor of the tobacco product. Therefore, the inorganic filler-containing sheet described above is applicable to all types of tobacco products, regardless of the type of tobacco product, and is highly versatile. Furthermore, even when incorporated into a tobacco substitute product containing a flavor source other than tobacco flavor or a tobacco substitute such as nicotine, the inorganic filler-containing sheet is unlikely to affect the flavor of the tobacco substitute product. Therefore, the inorganic filler-containing sheet described above is applicable to not only tobacco products but also tobacco substitute products of any type, and is highly versatile.

[0043] In addition, since inorganic fillers such as calcium carbonate are cheaper than binders and plasticizers, the inorganic filler-containing sheet described above is also advantageous in terms of production costs.

[0044] <2. Manufacturing method of inorganic filler-containing sheet> The inorganic filler-containing sheet is (i) 35 m ２ The porous support can be produced by mixing raw materials containing (i) an inorganic filler having a BET specific surface area of ​​1 / g or less, (ii) a binder, and (iii) a plasticizer, spreading the resulting mixture on a substrate into a sheet, and drying the mixture.

[0045] The mixing is preferably carried out until the raw materials for the inorganic filler-containing sheet are uniformly mixed. The mixing can be carried out by stirring the raw materials for the inorganic filler-containing sheet at room temperature (e.g., 15 to 25°C) for 1 to 60 minutes. The mixing can be carried out using a mixer such as a stand mixer (KSM8WH; manufactured by Kitchen Aid).

[0046] The resulting mixture is spread onto a substrate to a thickness of, for example, 0.05 to 0.3 mm using a roller such as a rolling roller (flat type; manufactured by Seaforce Co., Ltd.).

[0047] Drying can be carried out by leaving the spread mixture to stand at room temperature (e.g., 15 to 25°C) for 16 to 24 hours. Alternatively, drying can be carried out for a shorter time using a drying oven such as an Electric Drying Oven (DRN20DB; manufactured by ADVANTEC).

[0048] 3. Tobacco Rod and Flavor Rod The inorganic filler-containing sheet described above can be incorporated into, for example, a tobacco rod. ２ The present invention provides a tobacco rod comprising: an inorganic filler-containing sheet containing an inorganic filler having a BET specific surface area of ​​10 m / g or less, a binder, and a plasticizer, the inorganic filler being contained in an amount of 90% by mass or more and the binder and the plasticizer being contained in a total amount of 10% by mass or less; a tobacco material; and a cigarette paper for wrapping the tobacco filler. According to a preferred embodiment, the BET specific surface area of ​​the inorganic filler is 10 m / g or less. ２ / g or less. According to another preferred embodiment, the inorganic filler-containing sheet contains cellulose as a binder.

[0049] In this tobacco rod, the inorganic filler-containing sheet and the tobacco material constitute a tobacco filler, which may be tobacco shreds or reconstituted tobacco, as described above.

[0050] The inorganic filler-containing sheet can be cut into pieces of the same size as the tobacco material, and the resulting pieces can be incorporated into a tobacco rod. As described above, the inorganic filler-containing sheet has a thickness of, for example, 0.01 to 1 mm, preferably 0.05 to 0.3 mm. For example, the cut pieces of the inorganic filler-containing sheet can have long sides of 5 to 30 mm and short sides of 0.1 to 2 mm.

[0051] The proportion of the inorganic filler-containing sheet in the tobacco filler can be, for example, 1 to 99% by mass, preferably 5 to 40% by mass. The compounding ratio of the inorganic filler-containing sheet to the tobacco material is not particularly limited, but can be, for example, a mass ratio of 1:99 to 99:1, preferably 5:95 to 40:60.

[0052] In this tobacco rod, the wrapping paper may be the same as that used for wrapping tobacco filler in cigarettes or tobacco sticks for heated flavor inhalers.

[0053] Although the tobacco rod described above includes tobacco material (i.e., a source of tobacco flavor), the tobacco material may be replaced with a "flavor source other than tobacco flavor." That is, according to yet another aspect, ２ The present invention provides a flavor rod comprising: an inorganic filler-containing sheet containing an inorganic filler having a BET specific surface area of ​​10 m / g or less, a binder, and a plasticizer, the inorganic filler being contained in an amount of 90% by mass or more and the binder and the plasticizer being contained in a total amount of 10% by mass or less; a flavor filler containing a flavor source; and a wrapping paper for wrapping the flavor filler. According to a preferred embodiment, the BET specific surface area of ​​the inorganic filler is 10 m / g or less. ２ / g or less. According to another preferred embodiment, the inorganic filler-containing sheet contains cellulose as a binder.

[0054] This flavor rod has a structure similar to that of a tobacco rod, except that the tobacco material contained in the tobacco rod is expanded to any flavor source. That is, in this flavor rod, the flavor source may be tobacco material (i.e., a tobacco flavor source), or may be a flavor source other than tobacco flavor. Examples of flavor sources other than tobacco flavor include plant materials such as tea leaves and medicinal herbs, plant extracts such as tea leaf extract and medicinal herb extract, and various organic substances known as flavor components (e.g., organic substances known as components of floral or fruity flavors).

[0055] 4. Flavored Product The tobacco rod or flavor rod described above can be used as a component of a flavored product. That is, according to one aspect, there is provided a flavored product including the tobacco rod described above and a filter disposed downstream of the tobacco rod. According to another aspect, there is provided a flavored product including the flavor rod described above and a filter disposed downstream of the flavor rod.

[0056] Examples of flavored products include cigarettes and tobacco sticks for heated flavor inhalers. An example of a cigarette is shown in FIG. 1, and an example of a tobacco stick is shown in FIG.

[0057] The cigarette 1 shown in FIG. 1 includes a tobacco rod 2 including a tobacco filler material 2 a and tobacco cigarette paper 2 b wrapped around the tobacco filler material 2 a, a filter 3 including a filter material 3 a and a plug wrapper 3 b wrapped around the filter material 3 a, and tipping paper 4 wrapped around the tobacco rod 2 and the filter 3 so as to connect the tobacco rod 2 and the filter 3.

[0058] The tobacco rod 2 contains, as a tobacco filler 2a, a tobacco filler that includes the inorganic filler-containing sheet and tobacco material.

[0059] The filter 3 is a so-called plain filter, consisting of a single filter material 3a. The filter material 3a can be made of acetate tow or other filter material, as in ordinary cigarettes. The plug wrapper 3b can be 10 to 100 μm thick and may or may not be breathable, although breathable paper is generally used.

[0060] The tipping paper 4 is bonded with an adhesive so as to cover the entire plug wrapper 3b and a portion of the cigarette paper 2b. The tipping paper 4 may have small ventilation holes formed in one row, multiple rows, or a large number of irregularly-spaced holes along the circumferential direction of the cigarette.

[0061] The tobacco stick shown in FIG. 3 will be described later in the section <5. Tobacco products and tobacco substitute products>.

[0062] 5. Tobacco Products and Tobacco Substitute Products Although it has been explained above that the inorganic filler-containing sheet can be incorporated into a tobacco rod or a flavor rod, which are flavored product products, the inorganic filler-containing sheet can be incorporated into any tobacco product without being limited thereto. That is, according to one aspect, there is provided a tobacco product comprising the inorganic filler-containing sheet and a tobacco material.

[0063] A tobacco product is any product that provides a tobacco flavor to the user, including flavor inhalers that allow the user to inhale and smokeless tobacco products that allow the user to inhale and inhale tobacco flavor directly into the nasal or oral cavity.

[0064] Specific examples of flavor inhalers include combustion-type flavor inhalers that provide users with tobacco flavor by burning tobacco filler; non-combustion-heating-type flavor inhalers that provide users with tobacco flavor by heating tobacco filler without burning it; and non-heating-type flavor inhalers that provide users with tobacco flavor without burning or heating tobacco filler.

[0065] Smokeless tobacco includes snuff and chewing tobacco.

[0066] The inorganic filler-containing sheet described above may be incorporated as a part of the tobacco filler of a flavor inhaler or as a part of the tobacco filler of a smokeless tobacco.

[0067] Alternatively, the inorganic filler-containing sheet may be incorporated into a tobacco substitute product rather than a tobacco product. That is, according to another aspect, there is provided a tobacco substitute product comprising the inorganic filler-containing sheet and a tobacco substitute selected from the group consisting of a flavor source other than tobacco flavor and nicotine.

[0068] A tobacco substitute product refers to any product that provides users with a tobacco substitute or components derived therefrom. The tobacco substitute can be selected from the group consisting of a flavor source other than tobacco flavor and nicotine. Examples of flavor sources other than tobacco flavor include plant materials such as tea leaves and medicinal herbs, plant extracts such as tea leaf extracts and medicinal herb extracts, and various organic substances known as flavor components (e.g., organic substances known as components of floral or fruity flavors).

[0069] Tobacco substitute products have a structure similar to that of tobacco products, except that they contain a tobacco substitute instead of a tobacco filler, i.e., they may have the form of a flavor inhaler or a smokeless tobacco.

[0070] In the former case, the tobacco substitute product is a flavor inhaler that contains a tobacco substitute instead of a tobacco filler. In this case, the flavor inhaler may be any of a combustion type, a non-combustion heating type, and a non-heating type. Known examples of such flavor inhalers include products called botanical cigarettes and botanical diffusers.

[0071] In the latter case, the tobacco substitute product may have the form of a tea bag, in which the tobacco substitute is wrapped in a liquid-permeable packaging material (e.g., a nonwoven pouch). An example of such a tobacco substitute product is known as a nicotine pouch.

[0072] [Example of a Non-Combustion Heating Type Flavor Inhaler] An example of a non-combustion heating type flavor inhaler (hereinafter simply referred to as a "heating type flavor inhaler") will be described below with reference to Figures 2A, 2B, 3 and 4. In this example, the heating type flavor inhaler is composed of an aerosol generating device 100 and a tobacco stick 200. Figure 2A is a schematic front view of an example of the aerosol generating device. Figure 2B is a schematic top view of the aerosol generating device shown in Figure 2A. Figure 3 is a schematic side cross-sectional view of an example of the tobacco stick. Figure 4 is a cross-sectional view taken along line III-III of the aerosol generating device shown in Figure 2B.

[0073] For ease of explanation, the drawings may include an X-Y-Z Cartesian coordinate system. In this coordinate system, the Z axis faces vertically upward, the X-Y plane is positioned so as to cut the aerosol generation device 100 horizontally, and the Y axis is positioned so as to extend from the front to the back of the aerosol generation device 100. The Z axis can also be referred to as the insertion direction of the tobacco stick contained in the chamber 150 of the atomization unit 130 described below, or the axial direction of the chamber 150. The X axis is a direction perpendicular to the Y axis and the Z axis, and the X axis and the Y axis can also be referred to as the radial direction perpendicular to the axial direction of the chamber 150, or the radial direction of the chamber 150.

[0074] The aerosol generating device 100 is configured to generate an aerosol containing tobacco flavor components by heating the tobacco stick 200 containing the tobacco filler described above.

[0075] 2A and 2B, the aerosol generation device 100 has an outer housing 101 (corresponding to an example of a housing), a slide cover 102, and a switch unit 103. The outer housing 101 constitutes the outermost housing of the aerosol generation device 100 and has a size that fits in a user's hand. When a user uses the flavor inhaler, the user can hold the aerosol generation device 100 in their hand and inhale the aerosol.

[0076] The outer housing 101 has an opening (not shown) for receiving a tobacco stick, and the slide cover 102 is slidably attached to the outer housing 101 so as to close this opening.

[0077] The switch unit 103 is used to switch on and off the operation of the aerosol generation device 100. For example, by operating the switch unit 103 with a tobacco stick inserted into the aerosol generation device 100, a user can supply power from a power source (see reference numeral 121 in FIG. 4 ) to a heater (see reference numeral 140 in FIG. 4 ), thereby heating the tobacco stick without burning it.

[0078] The aerosol generating device 100 may further include a terminal (not shown). The terminal may be an interface for connecting the aerosol generating device 100 to, for example, an external power source. If the power source of the aerosol generating device 100 is a rechargeable battery, connecting the external power source to the terminal allows the external power source to pass current through the power source and charge the power source. In addition, connecting a data transmission cable to the terminal may allow data related to the operation of the aerosol generating device 100 to be transmitted to an external device.

[0079] Next, the tobacco stick used in the aerosol generating device 100 will be described. Fig. 3 is a schematic side cross-sectional view of an example of a tobacco stick 200. In this example, a flavor inhaler is configured by the aerosol generating device 100 and the tobacco stick 200. As shown in Fig. 3, the tobacco stick 200 has a smokable article 201, a tubular member 204, a hollow filter portion 206, and a filter portion 205.

[0080] The smokable article 201 is wrapped in a first cigarette paper 202. The tubular member 204, hollow filter portion 206, and filter portion 205 are wrapped in a second cigarette paper 203 that is different from the first cigarette paper 202. The second cigarette paper 203 also wraps a portion of the first cigarette paper 202 that wraps the smokable article 201. This connects the tubular member 204, hollow filter portion 206, and filter portion 205 to the smokable article 201. However, the second cigarette paper 203 may be omitted, and the tubular member 204, hollow filter portion 206, and filter portion 205 may be connected to the smokable article 201 using the first cigarette paper 202. A lip release agent 207 is applied to the outer surface of the second cigarette paper 203 near the end on the filter portion 205 side, to make it easier for the user to release their lips from the second cigarette paper 203. The portion of the tobacco stick 200 to which the lip release agent 207 is applied functions as the mouthpiece of the tobacco stick 200 .

[0081] The smokable article 201 corresponds to a tobacco filler and includes the inorganic filler-containing sheet and tobacco material described above. The first cigarette paper 202 that wraps the smokable article 201 may be a breathable sheet member. The tubular member 204 may be a paper tube or a hollow filter. In this example, the tobacco stick 200 includes the smokable article 201, the tubular member 204, a hollow filter portion 206, and a filter portion 205, but the configuration of the tobacco stick 200 is not limited to this. For example, the hollow filter portion 206 may be omitted, and the tubular member 204 and the filter portion 205 may be disposed adjacent to each other.

[0082] Next, the internal structure of the aerosol generation device 100 will be described. Fig. 4 is a cross-sectional view taken along line III-III of the aerosol generation device 100 shown in Fig. 2B. As shown in Fig. 4, an inner housing 110 (corresponding to an example of a housing) is provided inside the outer housing 101 of the aerosol generation device 100. A power supply unit 120 and an atomization unit 130 are provided in the internal space of the inner housing 110.

[0083] The power supply unit 120 has a power supply 121. The power supply 121 may be, for example, a rechargeable battery or a non-rechargeable battery. The power supply 121 is electrically connected to the atomizing unit 130. This allows the power supply 121 to supply power to the atomizing unit 130 so as to appropriately heat the tobacco stick 200.

[0084] 4, the atomization unit 130 has a metal chamber 150 (corresponding to an example of a cylindrical portion) extending in the insertion direction (Z-axis direction) of the tobacco stick 200, a heater 140 covering a part of the chamber 150, a heat insulating portion 132, and a substantially cylindrical insertion guide member 134 (corresponding to an example of a guide portion) that abuts against the opening of the chamber 150. The chamber 150 is configured to surround the periphery of the tobacco stick 200. The heater 140 is configured to include a heating portion that contacts the outer peripheral surface of the chamber 150 and heats the tobacco stick 200 inserted into the chamber 150.

[0085] 4, a bottom member 136 (corresponding to an example of an abutment portion) is provided at the bottom of the chamber 150. The bottom member 136 abuts against the tobacco stick 200 inserted into the chamber 150 in the insertion direction of the tobacco stick 200, and can function as a stopper that positions the tobacco stick 200. Here, the chamber 150 and the bottom member 136 form a storage portion that stores at least a portion of the tobacco stick 200. The bottom member 136 has an uneven surface that abuts against the tobacco stick 200, and can define a first air flow path that can supply air to the air intake port of the tobacco stick 200 (i.e., that communicates with the tobacco stick 200 stored in the storage portion).

[0086] The heat insulating part 132 has a generally cylindrical shape overall, and is arranged to cover the chamber 150. The insertion guide member 134 is provided between the sliding cover 102 in the closed position and the chamber 150. When the sliding cover 102 is in the open position, the insertion guide member 134 communicates with the outside of the aerosol generation device 100, and guides the insertion of the tobacco stick 200 into the chamber 150 by inserting the tobacco stick 200 into the insertion guide member 134.

[0087] The aerosol generating device 100 further has a first holding part 137 and a second holding part 138 that hold both ends of the chamber 150 and the heat insulating part 132. The first holding part 137 is arranged to hold the ends of the chamber 150 and the heat insulating part 132 on the negative Z-axis side. The second holding part 138 is arranged to hold the ends of the chamber 150 and the heat insulating part 132 on the slide cover 102 side (positive Z-axis side).

[0088] 6. Preferred embodiments Preferred embodiments are summarized below. [A1] 35 m ２ [A2] A tobacco rod comprising: an inorganic filler-containing sheet containing an inorganic filler having a BET specific surface area of ​​10 m / g or less, a binder, and a plasticizer, the inorganic filler being contained in an amount of 90% by mass or more and the binder and the plasticizer being contained in a total amount of 10% by mass or less; a tobacco material; and a cigarette paper for wrapping the tobacco filler. ... ２ / g or less. [A3] The tobacco rod according to [A1] or [A2], wherein the inorganic filler-containing sheet contains cellulose as the binder. [A4] The tobacco rod according to [A3], wherein the inorganic filler-containing sheet contains the cellulose in an amount of 10% by mass or less, preferably 1 to 5% by mass, and more preferably 1 to 3% by mass. [A5] The tobacco rod according to any one of [A1] to [A4], wherein the inorganic filler has a particulate shape.

[0089] [A6] The tobacco rod according to any one of [A1] to [A5], wherein the inorganic filler is non-combustible. [A7] The inorganic filler has a thickness of 0.1 to 35 m ２ / g, preferably 1 to 35 m ２ [A8] The tobacco rod according to any one of [A1] to [A6], wherein the inorganic filler has a BET specific surface area of ​​0.1 to 10 m / g. ２ / g, preferably 1 to 7 m ２ [A9] The tobacco rod according to any one of [A1] to [A7], wherein the inorganic filler has a BET specific surface area of ​​0.3 cm ３ / g or less, preferably 0.1 cm３ [A10] The tobacco rod according to any one of [A1] to [A8], wherein the inorganic filler has a total pore volume of 0 to 0.3 cm / g or less. ３ / g, preferably 0 to 0.1 cm ３ / g, more preferably 0 to 0.03 cm ３ The tobacco rod according to any one of [A1] to [A9], having a total pore volume of 1000 sq. ft. / g.

[0090] [A11] A tobacco rod according to any one of [A1] to [A10], wherein the inorganic filler has an average pore diameter of 40 nm or less, preferably 20 nm or less. [A12] A tobacco rod according to any one of [A1] to [A11], wherein the inorganic filler has an average pore diameter of 0 to 40 nm, preferably 0 to 20 nm. [A13] A tobacco rod according to any one of [A1] to [A12], wherein the inorganic filler has an average particle size D50 of 1 to 100 μm, preferably 2 to 20 μm. [A14] A tobacco rod according to any one of [A1] to [A13], wherein the inorganic filler has an aspect ratio of 1 to 10, preferably 1 to 2. [A15] A tobacco rod according to any one of [A1] to [A16], wherein the inorganic filler has an average pore size D50 of 0.1 to 5 g / cm ３ , preferably 0.5 to 2 g / cm ３ The tobacco rod according to any one of [A1] to [A14], having an apparent density of

[0091] [A16] The tobacco rod according to any one of [A1] to [A15], wherein the inorganic filler is calcium carbonate, silica, or alumina. [A17] The tobacco rod according to any one of [A1] to [A16], wherein the inorganic filler is calcium carbonate. [A18] The tobacco rod according to any one of [A1] to [A17], wherein the inorganic filler is calcium carbonate particles. [A19] The tobacco rod according to any one of [A1] to [A18], wherein the inorganic filler-containing sheet contains the inorganic filler in an amount of 90% by mass or more but less than 100% by mass, preferably 90 to 95% by mass. [A20] The tobacco rod according to any one of [A1] to [A19], wherein the binder is selected from the group consisting of celluloses, gums, gels, alginates, and inorganic binders.

[0092] [A21] The tobacco rod according to any one of [A1] to [A20], wherein the binder is a cellulose or a gum. [A22] The tobacco rod according to any one of [A1] to [A21], wherein the inorganic filler-containing sheet contains gellan gum or carboxymethyl cellulose as the binder. [A23] The tobacco rod according to any one of [A1] to [A22], wherein the binder is gellan gum or carboxymethyl cellulose. [A24] The tobacco rod according to any one of [A1] to [A23], wherein the inorganic filler-containing sheet contains the binder in an amount of more than 0% by mass and not more than 10% by mass, preferably 1 to 8% by mass, and more preferably 2 to 5% by mass. [A25] The tobacco rod according to any one of [A1] to [A24], wherein the plasticizer is selected from the group consisting of polyhydric alcohols, esters, high-boiling-point hydrocarbons, and hydroxy acids.

[0093] [A26] The tobacco rod according to any one of [A1] to [A25], wherein the plasticizer is a polyhydric alcohol. [A27] The tobacco rod according to any one of [A1] to [A26], wherein the plasticizer is glycerin. [A28] The tobacco rod according to any one of [A1] to [A27], wherein the inorganic filler-containing sheet contains the plasticizer in an amount of more than 0% by mass and not more than 10% by mass, preferably 1 to 8% by mass, and more preferably 2 to 7% by mass. [A29] The tobacco rod according to any one of [A1] to [A28], wherein the inorganic filler-containing sheet contains the binder and the plasticizer in a total amount of more than 0% by mass and not more than 10% by mass, preferably 2 to 10% by mass, and more preferably 4 to 10% by mass. [A30] The tobacco rod according to any one of [A1] to [A29], wherein the inorganic filler-containing sheet does not contain tobacco material.

[0094] [A31] The tobacco rod according to any one of [A1] to [A30], wherein the inorganic filler-containing sheet has a thickness of 0.01 to 1 mm, preferably 0.05 to 0.3 mm. [A32] The tobacco rod according to any one of [A1] to [A31], wherein the tobacco material is tobacco shreds or reconstituted tobacco. [B1] A flavored product comprising the tobacco rod according to any one of [A1] to [A32] and a filter arranged downstream of the tobacco rod.

[0095] [C1] 35m ２ [C2] An inorganic filler-containing sheet comprising an inorganic filler having a BET specific surface area of ​​10 m / g or less, a binder, and a plasticizer, the inorganic filler being contained in an amount of 90% by mass or more, and the binder and the plasticizer being contained in a total amount of 10% by mass or less. ２ / g or less. [C3] The inorganic filler-containing sheet according to [C1] or [C2], wherein the inorganic filler-containing sheet contains cellulose as the binder. [C4] The inorganic filler-containing sheet according to [C3], wherein the inorganic filler-containing sheet contains the cellulose in an amount of 10% by mass or less, preferably 1 to 5% by mass, and more preferably 1 to 3% by mass. [C5] The inorganic filler-containing sheet according to any one of [C1] to [C4], wherein the inorganic filler has a particulate shape.

[0096] [C6] The inorganic filler-containing sheet according to any one of [C1] to [C5], wherein the inorganic filler is non-flammable. [C7] The inorganic filler has a thickness of 0.1 to 35 m ２ / g, preferably 1 to 35 m ２ [C8] The inorganic filler-containing sheet according to any one of [A1] to [A6], wherein the inorganic filler has a BET specific surface area of ​​0.1 to 10 m / g. ２ / g, preferably 1 to 7 m ２ [C9] The inorganic filler-containing sheet according to any one of [C1] to [C7], wherein the inorganic filler has a BET specific surface area of ​​0.3 cm ３ / g or less, preferably 0.1 cm ３[C10] The inorganic filler-containing sheet according to any one of [C1] to [C8], wherein the inorganic filler has a total pore volume of 0 to 0.3 cm 3 / g or less. ３ / g, preferably 0 to 0.1 cm ３ / g, more preferably 0 to 0.03 cm ３ The inorganic filler-containing sheet according to any one of [C1] to [C9], having a total pore volume of 1000 sq. ft. / g.

[0097] [C11] The inorganic filler-containing sheet according to any one of [C1] to [C10], wherein the inorganic filler has an average pore diameter of 40 nm or less, preferably 20 nm or less. [C12] The inorganic filler-containing sheet according to any one of [C1] to [C11], wherein the inorganic filler has an average pore diameter of 0 to 40 nm, preferably 0 to 20 nm. [C13] The inorganic filler-containing sheet according to any one of [C1] to [C12], wherein the inorganic filler has an average particle size D50 of 1 to 100 μm, preferably 2 to 20 μm. [C14] The inorganic filler-containing sheet according to any one of [C1] to [C13], wherein the inorganic filler has an aspect ratio of 1 to 10, preferably 1 to 2. [C15] The inorganic filler has an average pore size D50 of 0.1 to 5 g / cm ３ , preferably 0.5 to 2 g / cm ３ [C1] to [C14], wherein the inorganic filler-containing sheet has an apparent density of 1000 or more.

[0098] [C16] The inorganic filler-containing sheet according to any one of [C1] to [C15], wherein the inorganic filler is calcium carbonate, silica, or alumina. [C17] The inorganic filler-containing sheet according to any one of [C1] to [C16], wherein the inorganic filler is calcium carbonate. [C18] The inorganic filler-containing sheet according to any one of [C1] to [C17], wherein the inorganic filler is calcium carbonate particles. [C19] The inorganic filler-containing sheet according to any one of [C1] to [C18], wherein the inorganic filler is contained in an amount of 90% by mass or more but less than 100% by mass, preferably 90 to 95% by mass. [C20] The inorganic filler-containing sheet according to any one of [C1] to [C19], wherein the binder is selected from the group consisting of celluloses, gums, gels, alginates, and inorganic binders.

[0099] [C21] The inorganic filler-containing sheet according to any one of [C1] to [C20], wherein the binder is a cellulose or a gum. [A22] The inorganic filler-containing sheet according to any one of [C1] to [C21], wherein the binder is gellan gum or carboxymethyl cellulose. [C23] The inorganic filler-containing sheet according to any one of [C1] to [C22], wherein the binder is gellan gum or carboxymethyl cellulose. [C24] The inorganic filler-containing sheet according to any one of [C1] to [C23], wherein the inorganic filler-containing sheet contains the binder in an amount greater than 0% by mass and not greater than 10% by mass, preferably 1 to 8% by mass, and more preferably 2 to 5% by mass. [C25] The inorganic filler-containing sheet according to any one of [C1] to [C24], wherein the plasticizer is selected from the group consisting of polyhydric alcohols, esters, high-boiling-point hydrocarbons, and hydroxy acids.

[0100] [C26] The inorganic filler-containing sheet according to any one of [C1] to [C25], wherein the plasticizer is a polyhydric alcohol. [C27] The inorganic filler-containing sheet according to any one of [C1] to [C26], wherein the plasticizer is glycerin. [C28] The inorganic filler-containing sheet according to any one of [C1] to [C27], wherein the inorganic filler-containing sheet contains the plasticizer in an amount of more than 0% by mass and not more than 10% by mass, preferably 1 to 8% by mass, and more preferably 2 to 7% by mass. [C29] The inorganic filler-containing sheet according to any one of [C1] to [C28], wherein the inorganic filler-containing sheet contains the binder and the plasticizer in a total amount of more than 0% by mass and not more than 10% by mass, preferably 2 to 10% by mass, and more preferably 4 to 10% by mass. [C30] The inorganic filler-containing sheet according to any one of [C1] to [C29], wherein the inorganic filler-containing sheet does not contain tobacco material.

[0101] [C31] The inorganic filler-containing sheet according to any one of [C1] to [C30], wherein the inorganic filler-containing sheet has a thickness of 0.01 to 1 mm, preferably 0.05 to 0.3 mm. [D1] A tobacco product comprising: the inorganic filler-containing sheet according to any one of [C1] to [C31]; and a tobacco material. [E1] A tobacco substitute product comprising: the inorganic filler-containing sheet according to any one of [C1] to [C31]; and a tobacco substitute selected from the group consisting of a flavor source other than tobacco flavor and nicotine. [F1] A flavor rod comprising: the inorganic filler-containing sheet according to any one of [C1] to [C31]; a flavor filler comprising a flavor source; and a cigarette paper around which the flavor filler is wrapped. [G1] A flavor product comprising the flavor rod according to [F1]; and a filter arranged downstream of the flavor rod.

[0102] Experiment 1: Measurement of physical properties of calcium carbonate The following physical properties were measured for five types of calcium carbonate (samples 1 to 5). (1) Particle size distribution Measurement principle: Laser diffraction / scattering method Measurement equipment: Laser diffraction / scattering particle size distribution analyzer LMS-3000 (Malvern Instruments) Measurement items: Concentration, span, uniformity, surface area moment average D[3,2], volume moment average D[4,3], D10, D50, D60, D90, mode diameter Measurement conditions: Measurement range: 0.010 to 3500.00 μm Dispersion medium: Isopropyl alcohol Ultrasonic dispersion time: 1 minute Measurement method: 1. A blank measurement was performed using the dispersion medium alone. 2. A sample that had been ultrasonically dispersed in advance was placed in the dispersion tank. 3. Particle size distribution was measured using a circulation system.

[0103] (2) Particle Shape Measurement Device: Particle Shape Image Analyzer PITA-04 (Seishin Enterprise Co., Ltd.) Measurement Items: Equivalent Circle Diameter, Circularity, Area, Major Diameter, Minor Diameter, Perimeter, Envelope Perimeter, Aspect Ratio, Convexo-Concave Degree, Feret Horizontal Diameter, Feret Vertical Diameter, Envelope Area, Circumscribed Rectangular Diameter, Circumscribed Rectangular Diameter, Average Concentration, Thinned Pixels, Thickness Measurement Conditions: Measurement Range: 4-1000 μm Dispersion Medium: Isopropyl Alcohol Objective Lens: 10x External Ultrasonic Dispersion Time: 1 Minute Measurement Method: 1. An appropriate amount of sample was dispensed into a polypropylene tube, and isopropyl alcohol was added to perform ultrasonic dispersion. 2. The dispersed sample was placed into the device unit. 3. Calcium carbonate particles were poured into the device, and particle size and shape were measured while photographing with an optical microscope.

[0104] (3) Fluidity index and flowability index Measuring device: Multifunctional powder property measuring device MT-02 (manufactured by Seishin Enterprises) Measurement items: angle of repose, spatula angle, compressibility, cohesion, fluidity index, dynamic bulk density, collapse angle, difference angle, dispersibility, flowability index Measurement conditions: Sieve opening: 710 μm for samples 1, 3, 4, and 5, 1700 μm for sample 2 Measurement method: Measurements were performed according to the manual for the measuring device.

[0105] (4) Specific surface area and pore distribution Measuring device: Quadruple-type specific surface area / pore distribution measuring device NOVA-TOUCH type (manufactured by Quantachrome) Measurement items: sample weight, BET specific surface area, total pore volume, average pore diameter Measurement conditions and measurement method: The measurement was carried out as described in the detailed description.

[0106] (5) Crushing Strength Microparticle crushing force measuring device NS-A300 type (manufactured by Nano Seeds Co., Ltd.) Measurement items: average crushing force, average particle diameter, average crushing strength Measurement method: The sample was scattered onto a stage by free fall, and the crushing force was measured using a crushing needle. The measurement was carried out at room temperature. Analysis method: A waveform chart of the pressing force was recorded, and the difference between the peak value at the time of crushing and the baseline (when no force is applied) was taken as the crushing force F [N], and the crushing strength S [Pa] was calculated using the following formula: S = 2.8F / (π·D ２ ) S: Crushing strength [Pa] F: Crushing force [N] D: Particle diameter [m] The particle diameter used to calculate the average particle diameter was measured for each particle from the image taken during measurement using image analysis software (WinROOF). The particle diameter D used to calculate the crushing strength was the length of the part sandwiched between the crusher and the plane to which the particle was attached.

[0107] (6) True Density Measurement principle: Gas phase displacement method Measurement device: Gas pycnometer UltraPyc 1200e (manufactured by Anton Paar) Measurement item: True density Measurement method: 1. The weight of the sample was measured. 2. The volume of the sample was measured using a volumeter. 3. The true density was calculated from the weight and volume of the sample. (Using Boyle's law and the gas equation of state, the volume was read when the pressure was changed under constant temperature conditions, and the density of the sample was calculated.) Measurement conditions: Cell capacity: 135 cm ３ Gas used: Helium

[0108] (7) Particle Density Measurement principle: Mercury intrusion method Measurement device: Mercury porosimeter AutoPore IV 9500 (manufactured by Micromeritics) Measurement item: Apparent density Measurement method: Measurement was carried out according to the manual for the measurement device.

[0109] Some of the results of measuring the physical properties of calcium carbonate are shown in the table below.

[0110]

[0111] Experiment 2: Sheet production and measurement of sheet tensile strength Inorganic filler-containing sheets were produced using the above five types of calcium carbonate (Samples 1 to 5) as the inorganic filler. Specifically, raw materials with the following composition were stirred and mixed uniformly in a mixer (stand mixer KSM8WH; manufactured by Kitchen Aid), and the resulting mixture was spread into a sheet using a rolling roller (flat type; manufactured by Seaforce Co., Ltd.). The sheet was then left to dry at room temperature (approximately 20°C) for 24 hours to produce a sheet.

[0112] Any one of five types of calcium carbonate (samples 1 to 5): 90% by mass Gellan gum or carboxymethyl cellulose (binder): 5% by mass Glycerin (plasticizer): 5% by mass

[0113] Depending on the type of calcium carbonate used, sheets could sometimes be formed, but sometimes they could not. Only when a sheet could be formed, the tensile strength of the sheet was measured.

[0114] The tensile strength of the sheet was measured according to the following procedure. Measuring device: Strograph E3 tensile test measuring device (manufactured by Toyo Seiki Seisakusho) Measurement method: 1. A sheet piece measuring 2 cm x 10 cm was cut from the prepared sheet. 2. The cut sheet piece was clamped in the device. 3. The device was operated to pull the sheet piece, and the load (N) was measured at the stage when a cut was made.

[0115] The table below shows whether the sheet could be formed and the measurement results of the sheet tensile strength.

[0116]

[0117] The sheets prepared using calcium carbonate samples 1, 2, and 3 were able to maintain their shape, but the sheets prepared using calcium carbonate samples 4 and 5 were unable to maintain their shape. The sheets prepared using calcium carbonate samples 1, 2, and 3 exhibited tensile strengths in the range of 2.6 to 11 N, and all of the sheets had sufficient tensile strength for application to tobacco rods.

[0118] When carboxymethyl cellulose was used as a binder, the tensile strength of the sheet was higher than that of gellan gum, which is thought to be due to the higher viscosity of the raw material solution used to prepare the sheet when carboxymethyl cellulose was used compared to when gellan gum was used.

[0119] The results of Experiments 1 and 2 revealed that the "BET specific surface area," "total pore volume," and "average pore diameter" are physical properties that affect whether or not sheet formation is possible. The reasons for this are thought to be as follows.

[0120] The BET specific surface area refers to the sum of the surface areas of all particles contained in a unit mass of powder. In order to form a sheet with a small amount of binder, it is considered that it is more effective for calcium carbonate particles to be in contact with the binder over a larger contact area, i.e., it is more effective for calcium carbonate particles to have a smaller BET specific surface area.

[0121] The total pore volume refers to the sum of the volumes of all pores. If there are a large number of pores or if the volume of each pore is large, the binder easily enters the pores and does not function as a binder. Therefore, it is thought that calcium carbonate with a small total pore volume is more effective.

[0122] The average pore diameter refers to the average value of the pore diameter. If the pore diameter is large, the binder easily enters the pores and it is difficult for the binder to function. Therefore, it is thought that calcium carbonate with a smaller average pore diameter is more effective.

[0123] Table 1 also lists data on particle size distribution, particle shape, and particle density, but these physical properties did not affect whether or not the calcium carbonate could be formed into a sheet. As described in the column for Experiment 1, various physical properties of calcium carbonate other than those listed in Table 1 were measured in Experiment 1, but none of the physical properties affected whether or not the calcium carbonate could be formed into a sheet.

[0124] Experiment 3: Preparation of sheets using four other types of calcium carbonate In this experiment, four other types of calcium carbonate were used as the inorganic filler to prepare inorganic filler-containing sheets.

[0125] First, various physical properties of four types of calcium carbonate (samples 6 to 9) were measured according to the same procedures as in Experiment 1. Some of the measurement results are shown in the table below.

[0126]

[0127] All four types of calcium carbonate (samples 6 to 9) had smaller "BET specific surface area," "total pore volume," and "average pore diameter" than samples 4 and 5.

[0128] Following the same procedure as in Experiment 2, sheets were produced using raw materials with the following composition: 90% by mass of one of four types of calcium carbonate (samples 6 to 9), 5% by mass of gellan gum or carboxymethyl cellulose (binder), and 5% by mass of glycerin (plasticizer).

[0129] The results regarding the feasibility of sheet forming are shown in the table below.

[0130]

[0131] The sheets produced using calcium carbonate samples 6 to 9 were able to maintain their shape as sheets. These results also support the idea that the "BET specific surface area," "total pore volume," and "average pore diameter" are physical properties that affect whether or not a sheet can be formed, and that small values ​​of the "BET specific surface area," "total pore volume," and "average pore diameter" are important for sheet formation.

[0132] Table 3 also lists data on particle size distribution, particle shape, and particle density, but these physical properties did not affect whether the calcium carbonate could be formed into a sheet. In addition, in Experiment 3, as in Experiment 1, various physical properties of calcium carbonate other than those listed in Table 3 were measured, but none of the physical properties affected whether the calcium carbonate could be formed into a sheet.

[0133] Experiment 4: Preparation of sheets containing cellulose as a binder In this experiment, inorganic filler-containing sheets containing cellulose as a binder were prepared. Sheets 4C to 4F were prepared using the "Calcium carbonate sample 4" listed in Table 1 as the inorganic filler with the following composition.

[0134]

[0135] Furthermore, using "Calcium carbonate sample 5" shown in Table 1 as the inorganic filler, sheets 5C to 5F were produced with the following compositions.

[0136]

[0137] The tensile strength of the prepared sheets was measured according to the procedure described in Experiment 2. The measurement results are shown in Tables 5 and 6.

[0138] Sheets 4C to 4F and 5C to 5F exhibited tensile strengths in the range of 2.43 to 7.78 N, and all of the sheets had sufficient tensile strength for application to tobacco rods. Furthermore, the tensile strength of the sheet improved as the blend ratio of cellulose in the sheet increased. This is thought to be because more cellulose fibers became entangled, holding the sheet components together.

[0139] The above experiments 2 and 3 showed that smaller values ​​of "BET specific surface area," "total pore volume," and "average pore diameter" are effective for forming a sheet with a small amount of binder. On the other hand, the calcium carbonates used in these experiments (samples 4 and 5) all had larger "BET specific surface area," "total pore volume," and "average pore diameter" than the calcium carbonates of samples 1 to 3 and 6 to 9. Therefore, when such calcium carbonates were used, it was observed that it tended to be difficult to form a sheet with a small amount of binder (gellan gum or carboxymethyl cellulose). However, this difficulty in forming a sheet was thought to be resolved by the cellulose fibers becoming entangled, holding the sheet components together, thereby maintaining the sheet shape.

[0140] 1... combustion type flavor inhaler, 2... tobacco rod, 2a... tobacco filler, 2b... tobacco cigarette paper, 3... filter, 3a... filtering material, 3b... plug wrapper, 4... tipping paper, 100... aerosol generating device, 101... outer housing, 102... slide cover, 103... switch unit, 110... inner housing, 120... power supply unit, 121... power supply, 130... atomization unit, 132... heat insulating unit, 134... insertion guide member, 136... bottom member, 137... first holding unit, 138... second holding unit, 140... heater, 150... chamber, 200... tobacco stick, 201... smokable article, 202... first cigarette paper, 203... second cigarette paper, 204... tubular member, 205... filter unit, 206... hollow filter unit, 207... lip release agent.

Claims

1. 35m ２ a tobacco rod comprising: an inorganic filler-containing sheet containing an inorganic filler having a BET specific surface area of ​​1 / g or less, a binder, and a plasticizer, the inorganic filler being contained in an amount of 90% by mass or more and the binder and the plasticizer being contained in a total amount of 10% by mass or less; a tobacco material; and a cigarette paper for wrapping the tobacco filler.

2. The BET specific surface area of ​​the inorganic filler is 10 m ２ 2. The tobacco rod according to claim 1, wherein the viscosity is 1 / g or less.

3. The tobacco rod according to claim 1 or 2, wherein the inorganic filler-containing sheet contains cellulose as the binder.

4. The inorganic filler is 0.3 cm ３ The tobacco rod according to any one of claims 1 to 3, having a total pore volume of 1 / g or less.

5. A tobacco rod according to any one of claims 1 to 4, wherein the inorganic filler has an average pore diameter of 40 nm or less.

6. A tobacco rod according to any one of claims 1 to 5, wherein the inorganic filler is calcium carbonate.

7. The tobacco rod according to any one of claims 1 to 6, wherein the inorganic filler-containing sheet contains gellan gum or carboxymethyl cellulose as the binder.

8. 35m ２ / g or less, a binder, and a plasticizer, the inorganic filler-containing sheet containing the inorganic filler in an amount of 90% by mass or more, and the binder and the plasticizer in a total amount of 10% by mass or less.

9. The BET specific surface area of ​​the inorganic filler is 10 m ２ The inorganic filler-containing sheet according to claim 8, wherein the surface roughness is 1 / g or less.

10. The tobacco rod according to claim 8 or 9, wherein the inorganic filler-containing sheet contains cellulose as the binder.

11. The inorganic filler is 0.3 cm ３ The inorganic filler-containing sheet according to any one of claims 8 to 10, having a total pore volume of 1 / g or less.

12. The inorganic filler-containing sheet according to any one of claims 8 to 11, wherein the inorganic filler has an average pore diameter of 40 nm or less.

13. The inorganic filler-containing sheet according to any one of claims 8 to 12, wherein the inorganic filler is calcium carbonate.

14. The inorganic filler-containing sheet according to any one of claims 8 to 13, wherein the inorganic filler-containing sheet contains gellan gum or carboxymethyl cellulose as the binder.

15. A tobacco product comprising: the inorganic filler-containing sheet according to any one of claims 8 to 14; and a tobacco material.

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