CN118159147A

CN118159147A - Tobacco sheet for non-combustion heating type flavor inhaler, and non-combustion heating type flavor inhaler system

Info

Publication number: CN118159147A
Application number: CN202280065574.XA
Authority: CN
Inventors: 小出明弘; 打井公隆; 松田尚大; 桥本彩香; 千田幸太郎; 光内健太; 春木溪介
Original assignee: Japan Tobacco Inc
Current assignee: Japan Tobacco Inc
Priority date: 2021-10-01
Filing date: 2022-07-28
Publication date: 2024-06-07
Also published as: JPWO2023053704A1; WO2023053635A1; CN118119288A; WO2023053704A1; KR20240067119A; CN118019462A; JPWO2023053635A1; CN117677307A

Abstract

A tobacco sheet for a non-combustion heating type flavor inhaler comprising a fibrous material.

Description

Tobacco sheet for non-combustion heating type flavor inhaler, and non-combustion heating type flavor inhaler system

Technical Field

The present invention relates to a tobacco sheet for a non-combustion heating type flavor inhaler, and a non-combustion heating type flavor inhaler system.

Background

In a combustion type flavor aspirator (cigarette), a tobacco filler including tobacco leaves and tobacco sheets is combusted to obtain flavor. For example, patent document 1 discloses a tobacco sheet for a combustion type flavor aspirator. As an alternative to the combustion type flavor aspirator, a non-combustion heating type flavor aspirator has been proposed in which a flavor source such as a tobacco sheet is heated instead of being burned to obtain a flavor. The heating temperature of the non-combustion heating type flavor aspirator is lower than the combustion temperature of the combustion type flavor aspirator, for example, about 400 ℃ or lower. In this way, since the heating temperature of the non-combustion heating type flavor aspirator is low, from the viewpoint of increasing the smoke amount, the non-combustion heating type flavor aspirator may be added with an aerosol generating agent to the flavor source. The aerosol generating agent is gasified by heating to generate an aerosol. The aerosol is supplied to the user along with flavor components such as tobacco components, and the user can obtain a sufficient flavor.

The non-combustion heating type flavor aspirator may include, for example: a tobacco-containing section filled with tobacco sheets or the like, a cooling section, and a filter section. The axial length of the tobacco-containing section of the non-combustion heated flavor aspirator is typically shorter than the axial length of the tobacco-containing section of the combustion flavor aspirator due to its relationship to the heating heater. Therefore, in the non-combustion heating type flavor aspirator, a large number of tobacco sheets or the like are filled in a short section containing tobacco segments in order to ensure the aerosol generation amount during heating. In order to fill a large number of tobacco sheets in a short section, a non-combustion heating type flavor aspirator generally uses a tobacco sheet having low bulk, i.e., a high density. The fluffiness is a value indicating the volume of a given mass of filaments of tobacco sheet compressed for a given period of time under a given pressure. For example, patent document 2 discloses a tobacco sheet for a non-combustion heating type flavor aspirator.

Prior art literature

Patent literature

Patent document 1: japanese patent publication No. 60-45914

Patent document 2: japanese patent No. 5969923

Disclosure of Invention

Problems to be solved by the invention

However, the present inventors have found that when a tobacco sheet having low bulk (high density) is used in consideration of the heating system, the heating capacity of the heater, and the generation of aerosol, the total heat capacity of the tobacco-containing segment increases, and therefore, depending on the heating method and the capacity of the heater, the tobacco sheet filled in the tobacco-containing segment may not sufficiently exert the aerosol generating action. In order to solve this problem, it is considered to reduce the total heat capacity of the tobacco-containing segment.

In order to reduce the total heat capacity of the tobacco-containing segment, the present inventors studied (1) reducing the specific heat of the tobacco raw material contained in the tobacco sheet and (2) using a tobacco sheet having high bulk (low density). However, it is difficult to reduce the specific heat of the tobacco material itself for (1), so it is considered that it is effective to reduce the total heat capacity of the tobacco-containing section by (2). Therefore, it is desired to develop a tobacco sheet with high bulk (low density) suitable for use in a non-combustion heated flavor aspirator.

The purpose of the present invention is to provide a tobacco sheet for a non-combustion heating type flavor-absorbing device, a non-combustion heating type flavor-absorbing device comprising the tobacco sheet, and a non-combustion heating type flavor-absorbing system.

Means for solving the problems

The present invention includes the following embodiments.

Mode 1

A tobacco sheet for a non-combustion heated flavor inhaler comprising a fibrous material.

Mode 2

The sheet according to mode 1, wherein the arithmetic average surface roughness Sa of at least 1 face is 5 to 30 μm.

Mode 3

The sheet according to mode 1 or 2, which is a pressure-formed sheet.

Mode 4

The sheet according to any one of modes 1 to 3, which comprises a cellulose derivative having a substitution degree of 0.65 or more.

Mode 5

The sheet according to claim 4, wherein the substitution degree is 0.7 or more.

Mode 6

A non-combustion heating type flavor aspirator comprising a tobacco-containing segment comprising the non-combustion heating type flavor aspirator tobacco sheet according to any one of modes 1 to 5.

Mode 7

A non-combustion heated flavor pumping system, comprising:

The non-combustion heating type flavor aspirator of embodiment 6, and

And a heating device for heating the tobacco-containing section.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a tobacco sheet for a non-combustion heating type flavor inhaler having high bulk, a non-combustion heating type flavor aspirator including the tobacco sheet, and a non-combustion heating type flavor aspiration system can be provided.

Drawings

Fig. 1 is a cross-sectional view showing an example of the non-combustion heating type flavor aspirator of the present embodiment.

Fig. 2 is a cross-sectional view showing an example of the non-combustion heating type flavor-absorbing system according to the present embodiment, (a) shows a state before the non-combustion heating type flavor-absorbing device is inserted into the heating device, and (b) shows a state in which the non-combustion heating type flavor-absorbing device is inserted into the heating device and heated.

Fig. 3 is a diagram illustrating one manner of tobacco segment.

Symbol description

1 Non-combustion heating type fragrant aspirator

2 Tobacco-containing segment

3 Cooling section

4 Central bore section

5 Filter segments

6 Mouthpiece section

7 Tubular member

8 Perforations

9. Second filling layer

10. Second inner rod packing material

11. Outer rod packaging material

12. Cigarette holder lining paper

13. Heating device

14. Fuselage body

15. Heater

16. Metal tube

17. Battery cell

18. Control unit

19. Concave part

20A tobacco-containing segment

21. Filling material

22. Packaging material

T tobacco sheet

Detailed Description

[ Tobacco sheet for non-Combustion heating type flavor aspirator ]

The tobacco sheet for a non-combustion heating type flavor inhaler (hereinafter also referred to as "tobacco sheet") according to the present embodiment contains a fibrous material. The tobacco sheet of the present embodiment contains a fibrous material, and therefore has a large volume and high bulk. Therefore, by using the tobacco sheet according to the present embodiment, the total heat capacity of the tobacco-containing segment can be reduced, and the tobacco sheet filled in the tobacco-containing segment can be made sufficiently conducive to aerosol generation. The tobacco sheet of the present embodiment preferably further comprises a tobacco raw material, an aerosol generator, and a molding agent, and the bulk of the tobacco sheet is further improved by setting the blending ratio thereof to a predetermined range.

(Fibrous Material)

The fibrous material included in the tobacco sheet of the present embodiment is not particularly limited as long as the fibrous material has a fibrous shape such as fibers. As the fibrous material, for example, there may be mentioned: fibrous pulp, fibrous tobacco material, fibrous synthetic cellulose, and the like. One kind of them may be used, or two or more kinds may be used in combination. Among them, fibrous pulp is preferable as the fibrous material from the viewpoint of fiber rigidity.

The proportion of the fibrous material contained in 100 mass% of the tobacco sheet is preferably 5 to 50 mass%. By setting the proportion of the fibrous material to 5 mass% or more, a volume size capable of ensuring a function can be achieved. Further, by setting the proportion of the fibrous material to 50 mass% or less, a sufficient tobacco flavor and aerosol can be produced when heated. The proportion of the fibrous material is more preferably 5 to 47% by mass, still more preferably 5 to 45% by mass, particularly preferably 5 to 40% by mass.

(Tobacco raw material)

In the case where the fibrous material is other than the fibrous tobacco material, the tobacco sheet of the present embodiment may further contain a tobacco raw material. The tobacco raw material is not particularly limited as long as it contains tobacco components, and examples thereof include tobacco powder and tobacco extract. Examples of the tobacco powder include tobacco leaves, veins, and residual stems. One kind of these may be used, or two or more kinds may be used in combination. They can be used as tobacco powder by cutting them into given sizes. From the viewpoint of further improving the bulk, the size of the tobacco powder is preferably 200 μm or more in terms of the cumulative 90% particle diameter (D90) in the volume-based particle size distribution measured by the dry laser diffraction method. As the tobacco extract, for example, there is mentioned a tobacco extract obtained by coarsely pulverizing tobacco leaves, mixing and stirring the tobacco leaves with a solvent such as water, extracting water-soluble components from the tobacco leaves, drying the obtained water extract under reduced pressure, and concentrating the dried water extract.

The proportion of the tobacco raw material contained in 100 mass% of the tobacco sheet is preferably 30 to 91 mass%. By setting the proportion of the tobacco raw material to 30 mass% or more, tobacco aroma can be sufficiently generated upon heating. Further, by setting the ratio of the tobacco raw material to 91% by mass or less, a sufficient amount of the aerosol generating agent and the molding agent can be contained. The proportion of the tobacco material is more preferably 50 to 90% by mass, still more preferably 55 to 85% by mass, particularly preferably 60 to 80% by mass.

(Molding agent)

In the case where the fibrous material is other than the fibrous molding agent such as fibrous synthetic cellulose, it is preferable that the tobacco sheet of the present embodiment further contains the molding agent from the viewpoint of securing the shape. Examples of the molding agent include polysaccharides, proteins, and synthetic polymers. One kind of these may be used, or two or more kinds may be used in combination. Examples of the polysaccharide include cellulose derivatives and polysaccharides derived from natural sources.

Examples of the cellulose derivative include: cellulose ethers such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxymethyl ethyl cellulose, hydroxypropyl methyl cellulose, benzyl cellulose, trityl cellulose, cyanoethyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, and aminoethyl cellulose; organic acid esters such as cellulose acetate, cellulose formate, cellulose propionate, cellulose butyrate, cellulose benzoate, cellulose phthalate, and tosyl cellulose; inorganic acid esters such as nitrocellulose, cellulose sulfate, cellulose phosphate, and cellulose xanthate.

Examples of the polysaccharide of natural origin include: guar gum, tara gum, locust bean gum, tamarind gum, pectin, gum arabic, gum tragacanth, karaya gum, gum ghatti (ghatti gum), arabinogalactan, flaxseed gum, cassia gum, psyllium seed gum, and sand sagebrush seed gum; polysaccharide derived from algae such as carrageenan, agar, alginic acid, propylene glycol alginate, red algae gelatin, and extract of vesicular algae; polysaccharides derived from microorganisms such as xanthan gum, gellan gum, curdlan, pullulan, agrobacterium succinoglycan (agrobacterium succinoglycan), welan gum, macrophomopsis gum, and neutral gum (rhamsan gum); polysaccharides derived from crustaceans such as chitin, chitosan, and glucosamine; starch, sodium starch glycolate, alpha starch, dextrin, and other starches.

Examples of the protein include: cereal proteins such as wheat gluten and rye gluten. Examples of the synthetic polymer include: polyphosphoric acid, sodium polyacrylate, polyvinylpyrrolidone, and the like.

When the molding agent is contained in the tobacco sheet, the proportion of the molding agent contained in 100 mass% of the tobacco sheet is preferably 0.1 to 15 mass%. By setting the proportion of the molding agent to 0.1 mass% or more, the raw material mixture can be easily molded into a sheet shape. Further, by setting the ratio of the molding agent to 15 mass% or less, it is possible to fully utilize other raw materials for securing the functions required for the tobacco-containing section of the non-combustion heating type flavor aspirator. The proportion of the molding agent is more preferably 0.2 to 13% by mass, still more preferably 0.5 to 12% by mass, particularly preferably 1 to 10% by mass.

(Aerosol generating agent)

From the viewpoint of increasing the amount of smoke during heating, the tobacco sheet of the present embodiment preferably further contains an aerosol-generating agent. Examples of the aerosol generating agent include glycerin, propylene glycol, and 1, 3-butanediol. One kind of them may be used, or two or more kinds may be used in combination.

When the aerosol-generating agent is contained in the tobacco sheet, the proportion of the aerosol-generating agent contained in 100 mass% of the tobacco sheet is preferably 5 to 50 mass%. By setting the proportion of the aerosol-generating agent to 5 mass% or more, sufficient aerosol can be generated upon heating from the viewpoint of the amount. In addition, by setting the proportion of the aerosol-generating agent to 50 mass% or less, sufficient aerosol can be generated upon heating from the viewpoint of heat capacity. The proportion of the aerosol generator is more preferably 6 to 45% by mass, still more preferably 8 to 40% by mass, particularly preferably 10 to 30% by mass.

(Reinforcing agent)

In the case where the fibrous material is other than the fibrous reinforcing agent such as fibrous pulp, the tobacco sheet of the present embodiment may further contain the reinforcing agent from the viewpoint of further improving physical properties. As the reinforcing agent, for example, there may be mentioned: and liquid substances having a surface coating function, which form a film when pulp, pectin suspension, etc. are dried. One kind of these may be used, or two or more kinds may be used in combination.

When the reinforcing agent is contained in the tobacco sheet, the proportion of the reinforcing agent contained in 100 mass% of the tobacco sheet is preferably 0.1 to 20 mass%. In the case where the ratio of the reinforcing agent is within the present range, other raw materials for securing the function required for the tobacco-containing section of the non-combustion heating type flavor aspirator can be fully utilized. The proportion of the reinforcing agent is more preferably 0.2 to 18% by mass, still more preferably 0.5 to 15% by mass.

(Moisturizer)

From the viewpoint of maintaining quality, the tobacco sheet of the present embodiment may further contain a humectant. Examples of the humectant include: sugar alcohols such as sorbitol, erythritol, xylitol, maltitol, lactitol, mannitol, and reduced maltose syrup. One kind of these may be used, or two or more kinds may be used in combination.

When the humectant is contained in the tobacco sheet, the proportion of the humectant contained in 100 mass% of the tobacco sheet is preferably 1 to 15 mass%. In this range, other materials for ensuring the function required for the tobacco-containing section of the non-combustion heating type flavor aspirator can be fully utilized. The content of the humectant is more preferably 2 to 12% by mass, and still more preferably 3 to 10% by mass.

(Other Components)

The tobacco sheet of the present embodiment may contain, in addition to the fibrous material, the tobacco raw material, the molding agent, the aerosol generating agent, the reinforcing agent, and the humectant, flavoring agents such as flavors and flavoring agents, colorants, humectants, preservatives, and diluents such as inorganic substances, as necessary.

(Fluffiness)

The tobacco sheet of the present embodiment preferably has a bulk of 190cc/100g or more. By setting the bulk to 190cc/100g or more, the total heat capacity of the tobacco-containing segment of the non-combustion heating type flavor aspirator can be sufficiently reduced, and the tobacco sheet filled in the tobacco-containing segment can contribute more to aerosol generation. The bulk is more preferably 210cc/100g or more, and still more preferably 230cc/100g or more. The upper limit of the range of the fluffiness is not particularly limited, and may be, for example, 800cc/100g or less. The fluffiness was measured by cutting tobacco pieces to a size of 0.8mm×9.5mm, storing the cut tobacco pieces in a 60% room at 22℃for 48 hours, and measuring the cut tobacco pieces with DD-60A (trade name, manufactured by Borgward Co.). The measurement was performed by placing 15g of the cut tobacco sheet into a cylindrical container having an inner diameter of 60mm and obtaining a volume when compressed for 30 seconds under a load of 3 kg.

(Constitution of tobacco sheet)

In the present embodiment, the "tobacco sheet" is formed by molding the components constituting the tobacco sheet into a sheet shape. Here, "sheet" means a shape having 1 pair of main surfaces and side surfaces which are substantially parallel. The length and width of the tobacco sheet are not particularly limited and may be appropriately adjusted according to the manner of filling. The thickness of the tobacco sheet is not particularly limited, but is preferably 100 to 1000 μm, more preferably 150 to 600 μm, in view of both heat transfer efficiency and strength.

(Method for producing tobacco sheet)

The tobacco sheet according to the present embodiment can be produced by a known method such as a rolling method or a casting method. Details of various tobacco sheets produced by such a method are disclosed in "tobacco dictionary, tobacco comprehensive research center, 2009.3.31".

< Calendering method >)

As a method for producing a tobacco sheet by rolling, for example, a method including the following steps is given.

(1) And a step of mixing water, tobacco powder, an aerosol generator, a molding agent and fibrous pulp to obtain a mixture.

(2) And a step of throwing the mixture into a calender roll to calender.

(3) And a step of peeling the rolled product from the calender roll with a doctor blade, transferring the peeled product to a web conveyor, and drying the product with a dryer.

In the case of producing a tobacco sheet by this method, the surfaces of the respective calender rolls may be heated or cooled according to the purpose, or the rotational speeds of the respective calender rolls may be adjusted. Further, by adjusting the interval between the calender rolls, a tobacco sheet having a desired weight per unit area can be obtained.

< Casting method >)

As a method for producing a tobacco sheet by casting, for example, a method including the following steps can be cited.

(2) And a step of forming a tobacco sheet by thinly stretching (casting) the mixture and drying the stretched mixture.

In the case of producing a tobacco sheet by this method, a step of removing a part of components such as nitrosamine by ultraviolet irradiation or X-ray irradiation of a slurry obtained by mixing water, tobacco powder, an aerosol generator, a molding agent, and fibrous pulp may be added.

Non-combustion heating type flavor aspirator

The non-combustion heating type flavor aspirator of the present embodiment includes a tobacco-containing segment including the tobacco sheet of the present embodiment. The non-combustion heating type flavor aspirator of the present embodiment is provided with the tobacco-containing segment filled with the tobacco sheet having high fluffiness of the present embodiment, and therefore, the total heat capacity of the tobacco-containing segment can be sufficiently reduced, and the tobacco sheet filled in the tobacco-containing segment contributes more to the generation of aerosol.

Fig. 1 shows an example of the non-combustion heating type flavor aspirator according to the present embodiment. The non-combustion heating type flavor aspirator 1 shown in fig. 1 includes: the tobacco-containing segment 2 filled with the tobacco sheet of the present embodiment, the cylindrical cooling segment 3 having perforations 8 on the circumference, the central hole segment 4, and the filter segment 5. The non-combustion heating type flavor aspirator of the present embodiment may have other sections in addition to the tobacco-containing section, the cooling section, the center hole section, and the filter section.

The length in the axial direction of the non-combustion heating type flavor aspirator according to the present embodiment is not particularly limited, but is preferably 40mm to 90mm, more preferably 50mm to 75mm, and even more preferably 50mm to 60 mm. The circumferential length of the non-combustion heating type flavor aspirator is preferably 16mm to 25mm, more preferably 20mm to 24mm, and even more preferably 21mm to 23 mm. Examples of the means include a tobacco-containing segment having a length of 20mm, a cooling segment having a length of 20mm, a central hole segment having a length of 8mm, and a filter segment having a length of 7 mm. The length of the filter segment may be selected in a range of 4mm to 10 mm. In addition, the ventilation resistance of the filter segments at this time may be selected so that the average per segment is 15mmH ₂ O/seg or more and 60mmH ₂ O/seg or less. The length of each of these segments may be appropriately changed according to manufacturing flexibility, required quality, and the like. Further, even if only the filter segment is disposed downstream of the cooling segment without using the center hole segment, the filter segment can function as a non-combustion heating type flavor aspirator.

(Tobacco-containing section)

The tobacco-containing segment 2 is filled with the tobacco sheet of the present embodiment in a roll paper (hereinafter also referred to as a wrapping material). The method of filling the roll paper with the tobacco sheet is not particularly limited, and for example, the tobacco sheet may be wrapped with a wrapping material, or the tobacco sheet may be filled with a tubular wrapping material. When the shape of the tobacco sheet has a longitudinal direction as in the case of a rectangular shape, the tobacco sheet may be filled so that the longitudinal direction is not a specific direction in the packaging material, or may be aligned so that the longitudinal direction is the axial direction of the tobacco-containing segment 2 or a direction perpendicular to the axial direction.

(Cooling section)

As shown in fig. 1, the cooling section 3 is constituted by a tubular member 7. The tubular member 7 may be, for example, a paper tube formed by processing thick paper into a cylindrical shape.

The tubular member 7 and a mouthpiece backing paper 12 described later are provided with perforations 8 penetrating through both. By the presence of the perforations 8, external air is introduced into the cooling section 3 during suction. As a result, the aerosol-gasifying component produced by heating the tobacco-containing section 2 is brought into contact with the external atmosphere, and the temperature thereof is lowered, so that liquefaction occurs to form an aerosol. The diameter (diameter length) of the through hole 8 is not particularly limited, and may be, for example, 0.5mm or more and 1.5mm or less. The number of the perforations 8 is not particularly limited, and may be 1 or 2 or more. For example, a plurality of perforations 8 may be provided on the circumference of the cooling section 3.

The amount of external air introduced from the through holes 8 is preferably 85% by volume or less, more preferably 80% by volume or less, relative to the volume of the total air sucked by the user. By setting the ratio of the amount of the external air to 85% by volume or less, the reduction in flavor due to dilution with the external air can be sufficiently suppressed. In other words, this is also referred to as a ventilation ratio. The lower limit of the range of the ventilation ratio is preferably 55% by volume or more, more preferably 60% by volume or more, from the viewpoint of cooling performance.

In addition, the cooling section may be a section comprising a sheet of suitably constructed material after creasing, pleating, or folding. The cross-sectional profile of such elements sometimes shows randomly oriented channels. Additionally, the cooling section may comprise bundles of longitudinally extending tubes. Such a cooling section may be formed, for example, by a roll of paper being gathered, pleated, or folded sheet material.

The length of the cooling section in the axial direction may be, for example, 7mm or more and 28mm or less, and may be, for example, 18mm. In addition, the cooling section may have a substantially circular axial cross-sectional shape, and may have a diameter of, for example, 5mm or more and 10mm or less, and may have a diameter of, for example, about 7mm.

(Central hole section)

The center hole section is composed of a filling layer having 1 or more hollow portions and an inner rod packing material (inner roll paper) that covers the filling layer. For example, as shown in fig. 1, the center hole section 4 is constituted by a second filling layer 9 having a hollow portion and a second inner rod packing material 10 that covers the second filling layer 9. The central hole section 4 has a function of improving the strength of the mouthpiece section 6. The second filler layer 9 may be, for example, a rod having an inner diameter of 1.0mm or more and 5.0mm or less, which is obtained by filling cellulose acetate fibers at a high density, adding 6 mass% or more and 20 mass% or less of a plasticizer containing triacetin to the mass of cellulose acetate, and curing the plasticizer. The second filler layer 9 has a high fiber packing density, and therefore, air and aerosol flow only through the hollow portion at the time of suction, and substantially do not flow into the second filler layer 9. Since the second filling layer 9 inside the central hole section 4 is a fiber filling layer, the feeling of touch from the outside in use is not substantially felt uncomfortable by the user. It should be noted that the central hole section 4 may not have the second inner rod packing material 10 but may be maintained in its shape by thermoforming.

(Filter section)

The constitution of the filter segment 5 is not particularly limited, and may be constituted by a single or a plurality of filler layers. The outside of the filling layer may be wrapped with one or more rolls of paper. The average ventilation resistance per section of the filter section 5 may be appropriately changed according to the amount of filler, material, etc. filled in the filter section 5. For example, in the case where the filler is cellulose acetate fiber, if the amount of cellulose acetate fiber filled in the filter segment 5 is increased, the ventilation resistance is increased. In the case where the filler is cellulose acetate fiber, the cellulose acetate fiber may have a packing density of 0.13 to 0.18g/cm ³. The air flow resistance was measured by an air flow resistance measuring instrument (trade name: SODIMAX, SODIM, inc.).

The length of the circumference of the filter segment 5 is not particularly limited, but is preferably 16 to 25mm, more preferably 20 to 24mm, and even more preferably 21 to 23mm. The axial length of the filter segment 5 may be selected to be 4 to 10mm, and may be selected so that the ventilation resistance thereof is 15 to 60mmH ₂ O/seg. The axial length of the filter segments 5 is preferably 5 to 9mm, more preferably 6 to 8mm. The shape of the cross section of the filter segment 5 is not particularly limited, and may be, for example, circular, elliptical, polygonal, or the like. In addition, destructive capsules containing flavours, flavourant beads, flavourants may be added directly to the filter segment 5.

As shown in fig. 1, the central hole section 4 and the filter section 5 may be connected by a plug wrap (outer wrap) 11. The outer rod packing material 11 may be, for example, cylindrical paper. In addition, the tobacco-containing section 2, the cooling section 3, and the joined central hole section 4 and filter section 5 may be joined by a tipping paper 12. The connection may be made by, for example, applying a slurry such as a vinyl acetate-based slurry to the inner side of the tipping paper 12, and winding the resulting material in the 3 sections. It should be noted that the sections may be connected together by separating a plurality of interleaving papers a plurality of times.

[ Non-Combustion heating type fragrance suction System ]

The non-combustion heating type flavor-absorbing system of the present embodiment is provided with the non-combustion heating type flavor-absorbing device of the present embodiment, and a heating device for heating the tobacco-containing section of the non-combustion heating type flavor-absorbing device. The non-combustion heating type flavor-absorbing system of the present embodiment may have other configurations in addition to the non-combustion heating type flavor-absorbing device of the present embodiment and the heating device described above.

Fig. 2 shows an example of the non-combustion heating type fragrance pumping system according to the present embodiment. The non-combustion heating type flavor suction system shown in fig. 2 includes the non-combustion heating type flavor suction device 1 of the present embodiment, and a heating device 13 for heating the tobacco-containing section of the non-combustion heating type flavor suction device 1 from the outside.

Fig. 2 (a) shows a state before the non-combustion heating type flavor aspirator 1 is inserted into the heating device 13, and fig. 2 (b) shows a state in which the non-combustion heating type flavor aspirator 1 is inserted into the heating device 13 to be heated. The heating device 13 shown in fig. 2 includes a body 14, a heater 15, a metal pipe 16, a battery unit 17, and a control unit 18. The main body 14 has a cylindrical recess 19, and the heater 15 and the metal pipe 16 are disposed on the inner side surface of the recess 19 at positions corresponding to the tobacco-containing sections of the non-combustion heating type flavor aspirator 1 inserted into the recess 19. The heater 15 may be a resistance-based heater, and the heater 15 may be heated by supplying electric power from the battery unit 17 in response to an instruction from the control unit 18 that performs temperature control. The heat emitted by the heater 15 is conducted through the metal tube 16 of high thermal conductivity to the tobacco-containing section of the non-combustion heated flavor aspirator 1.

Since the illustration is schematically shown in fig. 2 (b), a gap is present between the outer periphery of the non-combustion heating type flavor aspirator 1 and the inner periphery of the metal tube 16, and in practice, it is preferable that a gap is not present between the outer periphery of the non-combustion heating type flavor aspirator 1 and the inner periphery of the metal tube 16 for the purpose of efficiently conducting heat. The heating device 13 may heat the tobacco-containing section of the non-combustion heating type flavor aspirator 1 from the outside, or may heat the tobacco-containing section from the inside.

The heating temperature by the heating device is not particularly limited, but is preferably 400 ℃ or lower, more preferably 150 ℃ or higher and 400 ℃ or lower, and still more preferably 200 ℃ or higher and 350 ℃ or lower. The heating temperature means the temperature of the heater of the heating device.

In addition, excellent processability is required for tobacco sheets. The sheet produced by the paper-making method is composed of fibrous tobacco residues, and therefore, although the strength is excellent, the smoothness of the surface is not a sufficient level. Further, since the wet sheet in a state rich in moisture is dried in the sheet produced by the casting method, bubbles are generated on the surface due to vapor or the like generated during the drying. Further, smoothness is not a sufficient level due to thinning of the wet sheet ends during evaporation of moisture and shrinkage of the wet sheet. In addition, in the case of blending a fibrous material, the material is entangled to form a sphere, whereby the smoothness of the sheet surface is also impaired. In general, tobacco sheets are subjected to processing such as molding and cutting, and are used for smoking articles. If the smoothness of the surface of the tobacco sheet is insufficient during the processing, the sheet may be broken when the sheet is brought into contact with the processing apparatus. Therefore, the tobacco sheet having excellent external processability in addition to the high bulk as the embodiment 1 will be described below.

In addition, conventional tobacco sheets may generate fine powder called "cut tobacco leakage" during or after use, and may cause operational problems such as adhesion to clothing. Therefore, if the leakage of cut tobacco can be reduced, the operability can be improved. Therefore, the tobacco sheet in which the leakage of cut tobacco is reduced in addition to the high bulk as the mode 2 will be described below.

[ Mode 1]

The tobacco sheet in this embodiment includes at least a tobacco material and a binder.

(1) Adhesive agent

The binder is one of the above-mentioned molding agents, and is an adhesive for bonding tobacco materials to each other or to other components. In this embodiment, a known adhesive may be used. Examples of such binders include: polysaccharide such as guar gum and xanthan gum, cellulose derivatives such as CMC (carboxymethyl cellulose), CMC-Na (sodium salt of carboxymethyl cellulose), and HPC (hydroxypropyl cellulose). The upper limit of the content of the binder is preferably 6 mass% or less, and the lower limit is preferably 1 mass% or more, and more preferably 3 mass% or more, based on the dry mass (the mass excluding the mixed water, hereinafter the same) of the tobacco sheet. When the amount of the binder exceeds the upper limit value or falls below the lower limit value, the above-mentioned effects may not be sufficiently exhibited.

Examples of the binder used in the present embodiment include polysaccharides, proteins, and synthetic polymers. These specific examples are shown below. In this embodiment, these binders may be used in combination.

1) Polysaccharides and their use

1-1) Cellulose derivatives

[ Cellulose ethers ]

Methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxymethylethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, benzylcellulose, triphenylmethylcellulose, cyanoethylcellulose, carboxymethylcellulose, carboxyethylcellulose, aminoethylcellulose.

[ Cellulose esters ]

Organic acid esters: cellulose acetate, cellulose formate, cellulose propionate, cellulose butyrate, cellulose benzoate, cellulose phthalate, and tosyl cellulose.

Inorganic acid ester: nitrocellulose, cellulose sulfate, cellulose phosphate, and cellulose xanthate.

1-2) Polysaccharides of natural origin

[ Plant origin ]

Guar gum, tara gum, locust bean gum, tamarind gum, pectin, gum arabic, gum tragacanth, karaya gum, gum ghatti (ghatti gum), arabinogalactan, flaxseed gum, cassia gum, psyllium seed gum, and sand sagebrush seed gum.

[ Algae Source ]

Carrageenan, agar, alginic acid, propylene glycol alginate, red algae gum and a cyst algae extract.

[ Microbial origin ]

Xanthan gum, gellan gum, curdlan, pullulan, agrobacterium succinoglycan (agrobacterium succinoglycan), welan gum, macrophomopsis gum, neutral gum (rhamsan gum).

[ Crustacean Source ]

Chitin, chitosan, glucosamine.

[ Starches ]

Starch, sodium starch glycolate, alpha starch, dextrin.

2) Proteins

Wheat gluten and rye gluten.

3) Synthetic polymers

Polyphosphoric acid, sodium polyacrylate, and polyvinylpyrrolidone.

(2) Tobacco material

The tobacco material used in the present embodiment may be the fibrous tobacco material described above or the tobacco material described above. Specifically, in the present embodiment, as a tobacco material other than the fibrous tobacco material, a material obtained by cutting dried tobacco leaves, a crushed tobacco leaf product, or the like can be used. The tobacco leaf crushed material is particles obtained by crushing tobacco leaves. The particle diameter D90 of the tobacco leaf pulverized product is preferably 200 μm or more as described above, and the upper limit thereof may be preferably 1000 μm or less, more preferably 50 to 500. Mu.m. The average particle diameter D50 is preferably 20 to 1000. Mu.m, more preferably 50 to 500. Mu.m. The pulverization may be performed by a known pulverizer, and may be performed by any of dry pulverization and wet pulverization. Accordingly, the crushed tobacco leaves are also referred to as tobacco particles. In this embodiment, the particle size can be obtained by a laser diffraction/scattering method, and specifically, can be measured by using a laser diffraction type particle size distribution measuring apparatus (for example, LA-950, horiba, ltd.). The type of tobacco is not limited, and those belonging to the yellow, burley, oriental, local (in-process), other tobacco (Nicotiana tabacum) and yellow tobacco (Nicotiana rustica) series may be used. The amount of the tobacco material in the tobacco sheet is not particularly limited, but is preferably 50 to 95% by mass, more preferably 60 to 90% by mass, based on the dry mass.

(3) Aerosol generating agent

In this embodiment, a known aerosol generating agent may be used, and examples thereof include: polyhydric alcohols such as glycerin and Propylene Glycol (PG), substances having boiling points exceeding 100deg.C such as triethyl citrate (TEC) and glyceryl triacetate. In this embodiment, the amount of the aerosol-generating agent in the tobacco sheet is preferably 5 to 40% by mass, more preferably 10 to 20% by mass, based on the dry mass (the mass excluding the mixed water, hereinafter the same). When the amount of the aerosol generating agent exceeds the upper limit, there is a risk that it is difficult to produce a tobacco sheet, and when the amount is below the lower limit, there is a risk that the smoke feeling is reduced.

(4) Emulsifying agent

In this embodiment, the tobacco sheet may contain an emulsifier. The emulsifier can increase the affinity of the lipophilic aerosol generator for hydrophilic tobacco materials. Therefore, it is effective to add an emulsifier particularly in the case of using a lipophilic aerosol generating agent. As the emulsifier, a known emulsifier can be used, and examples thereof include emulsifiers having an HLB value of 8 to 18. The amount of the emulsifier is not particularly limited, but is preferably 0.1 to 3 parts by mass, more preferably 1 to 2 parts by mass, per 100 parts by mass of the tobacco sheet.

(5) Spice

In this embodiment, the tobacco sheet may contain a flavor. Fragrances are substances that provide a fragrance, flavor. The perfume may be natural perfume or synthetic perfume. As the perfume, 1 kind of perfume may be used, or a mixture of plural kinds of perfumes may be used. As the flavoring, any flavoring commonly used in smoking articles can be used, and specific examples thereof will be described later. The flavoring may be included in the sheet for a smoking article in an amount capable of providing a preferred flavor or taste to the smoking article, for example, in an amount of preferably 1 to 30 mass%, more preferably 2 to 20 mass% in the tobacco sheet.

The type of the perfume is not particularly limited, and from the viewpoint of imparting a good fragrance feel, examples thereof include: acetoanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract (alfalfa extract), amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, peru balsam oil, beeswax absolute, benzaldehyde, benzoin resin, benzyl alcohol, benzyl benzoate, benzyl propionate, 2, 3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, beta-carotene, carrot juice, L-carvone, beta-caryophyllene, cinnamon bark oil, cedar oil, celery seed oil, chamomile oil, cinnamaldehyde, cinnamic acid, cinnamyl alcohol, cinnamyl cinnamate, citronellol, DL-citronellol, sage extract, cocoa, coffee kang brewing gram oil, coriander oil, cumyl aldehyde, artemisia oil, delta-decalactone, gamma-decalactone, capric acid, dill herb oil, 3, 4-dimethyl-1, 2-cyclopentanedione, 4, 5-dimethyl-3-hydroxy-2, 5-dihydrofuran-2-one, 3, 7-dimethyl-6-octenoic acid, 2, 3-dimethylpyrazine, 2, 5-dimethylpyrazine, 2, 6-dimethylpyrazine, ethyl 2-methylbutanoate, ethyl acetate, ethyl butyrate, ethyl caproate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl caprylate, ethyl oleate, ethyl palmitate, ethyl phenylacetate, ethyl propionate, ethyl stearate, ethyl valerate, ethyl vanillin glucoside, 2-ethyl-3, (5 or 6) -dimethylpyrazine, 5-ethyl-3-hydroxy-4-methyl-2 (5H) -furanone, 2-ethyl-3-methyl pyrazine, eucalyptol, fenugreek absolute, cytisine absolute, gentian liquor, geraniol, geranyl acetate, grape juice, guaiacol, guava extract, gamma-heptanolide, gamma-caprolactone, caproic acid, cis-3-hexen-1-ol, hexyl acetate, hexanol, hexyl phenylacetate, honey, 4-hydroxy-3-pentenoic acid lactone, 4-hydroxy-4- (3-hydroxy-1-butenyl) -3, 5-trimethyl-2-cyclohexen-1-one 4- (p-hydroxyphenyl) -2-butanone, sodium 4-hydroxyundecanoate, permanent flower (immortelle) absolute, beta-ionone, isoamyl acetate, isoamyl butyrate, isoamyl phenylacetate, isobutyl acetate, isobutyl phenylacetate, jasmine absolute, cola tincture, rice oil, terpeneless lemon oil, licorice extract, linalool, linalyl acetate, round leaf angelica root oil, maltol, maple syrup, menthol, menthone, acetic acid-L-room oilEsters, p-methoxybenzaldehyde, methyl-2-pyrrolyl ketone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4' -methylacetophenone, methylcyclopentenolone, 3-methylpentanoic acid, mimosa absolute, molasses, myristic acid, nerol, nerolidol, gamma-nonolactone, nutmeg oil, delta-octalactone, octanal, caprylic acid, neroli oil, orange oil, iris oil, palmitic acid, omega-pentadecanol, peppermint oil, ilex paraguariensis leaf oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, propenyl guaiacol, propyl acetate, 3-propylidene-1-isobenzofuranone, prune juice, pyruvic acid the extract of Salvia officinalis, oleum Rosae Rugosae, rum, salvia officinalis, oleum Santali albi, spearmint oil, storax absolute, tagetes Erecta oil, tea distillate, alpha-terpineol, terpineyl 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-trimethyl-1-cyclohexenyl) 2-butene-4-one, 2, 6-trimethyl-2-cyclohexene-1, 4-dione, 4- (2, 6-trimethyl-1, 3-cyclohexadienyl) 2-butene-4-one, 2,3, 5-trimethylpyrazine, gamma-undecalactone, vanilla extract, vanillin, veratraldehyde, violet leaf absolute, N-ethyl-pair/>Alkyl-3-carboxamides (WS-3), ethyl-2- (p/>)Alkyl-3-carboxamide) acetate (WS-5), sugar (sucrose, fructose, etc.), cocoa powder, carob powder, caraway powder, licorice powder, orange peel powder, rose hip powder, chamomile pollen (flower) powder, lemon verbena powder, peppermint powder, leaf (leaf) powder, spearmint powder, black tea powder, natural plant flavors (e.g., jasmine oil, lemon oil, vetiver oil, angelica sinensis oil), esters (e.g., acetic acid/>Esters, isoamyl propionate, etc.), alcohols (e.g., phenethyl alcohol, cis-6-nonen-1-ol, etc.). These perfumes may be used singly or in combination of 1 kind or more than 2 kinds.

(6) Characteristics and morphology of tobacco sheet

1) Arithmetic average surface roughness Sa

Preferably, at least one surface of the tobacco sheet in the present embodiment has Sa of 5 to 30. Mu.m. The Sa is an index of surface roughness, and when the tobacco sheet of the present embodiment has Sa in the above range, the workability is excellent, and the leakage of cut tobacco from the surface is reduced. From this viewpoint, sa is more preferably 10 to 25. Mu.m, still more preferably 10 to 20. Mu.m. The tobacco sheet of the present embodiment preferably has Sa in the above range on both sides.

2) Thickness of (L)

The thickness of the tobacco sheet is not limited, but in one embodiment is preferably 20 to 2000. Mu.m, more preferably 100 to 1500. Mu.m, and still more preferably 100 to 1000. Mu.m.

3) Mechanical properties

The tobacco sheet of the present embodiment has a tensile elongation of preferably 2.0% or more, more preferably 3.0% or more, and still more preferably 5.0% or more. The upper limit of the tensile elongation is not limited, but is usually about 15% or less. The tobacco sheet has a tensile stress of preferably 2.0N/mm or more, more preferably 2.5N/mm or more, and still more preferably 3.0N/mm or more.

4) Operability of

The smoothness of the tobacco sheet in this embodiment affects the operability of the product. For example, in a smoking article using a tobacco sheet having poor smoothness, fine powder called so-called cut tobacco leakage occurs during or after use, and the smoking article is likely to be attached to clothing or other handling problems. However, the tobacco sheet of the present invention is excellent in smoothness, and therefore, such occurrence of defects can be suppressed.

(7) Tobacco segment

Tobacco segments for smoking articles may be manufactured from tobacco sheets. In one embodiment, the tobacco segment includes a cylindrical packaging material, and includes tobacco sheets that are spirally filled in the packaging material (see fig. 3 (a)). In the figure, 20A is a tobacco segment, T is a tobacco sheet, and 22 is a wrapper, typically paper. The tobacco segment is preferably rod-shaped, and may have a length of 15 to 80mm and a diameter of about 5 to 10 mm. The tobacco segment 20A shown in fig. 3A may be cut to have an aspect ratio (length/diameter) of about 0.5 to 1.2 (see fig. 3B).

In another embodiment, the tobacco segment 20A includes a cylindrical wrapping material 22 and a tobacco sheet T folded and packed in the wrapping material. The ridge line generated by the folding is substantially parallel to the longitudinal direction of the segment (see fig. 3 (C)). The tobacco segment 20A is preferably rod-shaped, and may have a length of 15 to 80mm and a diameter of about 5 to 10 mm. In this embodiment, the tobacco sheet T is preferably subjected to surface folding such as pleating or crimping.

In another embodiment, the tobacco segment 20A includes a tubular wrapping material 22 and a cut piece Tc of a tobacco sheet filled in the wrapping material (see fig. 3D). The tobacco segment 20A is preferably rod-shaped, and may have a length of 15 to 80mm and a diameter of about 5 to 10 mm. The size of the cut piece is not limited, and for example, the length of the longest side may be about 2 to 20mm and the width may be about 0.5 to 1.5 mm.

In another embodiment, the tobacco segment 20A includes a tubular wrapping material 22 and a strand-type tobacco filler filled in the wrapping material (see fig. 3E). The strand cut tobacco is filled in such a manner that the longitudinal direction thereof is substantially parallel to the longitudinal direction of the wrapping material 22. The width of the strand-type tobacco shreds can be set to be about 0.5-1.5 mm.

In another embodiment, the tobacco segment 20A includes a cylindrical wrapper 22 and tobacco filler randomly filled in the wrapper. The cut tobacco is a cut material and is different from the wire harness type cut tobacco.

[ Method of production ]

The tobacco sheet according to the present embodiment can be produced by any method, and is preferably produced by a method including the following steps.

Step 1, kneading at least a fibrous material, a tobacco material, a binder, and a medium to prepare a mixture.

And step2, compacting or extruding the mixture from a die head to prepare a wet sheet.

And step 3, drying the wet sheet.

The sheet thus molded by applying pressure is referred to as a "pressure-molded sheet", and as described later, the "pressure-molded sheet" includes a "laminated sheet" and an "extruded sheet". The laminated sheet is a sheet obtained by compacting the mixture with a roller for 1 or more times to a target thickness and then drying to a target moisture content. The extruded sheet is a sheet obtained by extruding the mixture from a T die or the like at a target thickness and then drying the extruded sheet to a target moisture content. The combination of calendaring and extrusion may be performed in a press formed sheet. For example, the mixture may be further compressed to form a sheet after extrusion.

(1) Step 1

In this step, a fibrous material, a tobacco material, a binder and a medium are kneaded. Aerosol-generating substrates, emulsifiers or fragrances may also be added as desired. The amount of each component may be adjusted so as to achieve the above-described amounts. The medium preferably contains a water-soluble organic solvent having a boiling point lower than 100 ℃ such as water or ethanol as a main component, and more preferably water or ethanol.

The present step may be performed by kneading the components, and is preferably performed by 1) pulverizing the raw materials (for example, single leaves), 2) preparing the wet powder, and 3) kneading.

1) Crushing

The raw material is preferably coarsely pulverized, followed by fine pulverization using a pulverizer (for example, ACM-5 manufactured by Hosokawa Micron Co., ltd.). The particle diameter D90 after the fine pulverization is preferably 20 to 1000. Mu.m. The particle size can be measured by a laser diffraction type particle size analyzer such as a Mastersizer (manufactured by Malvern corporation).

2) Preparation of wet powder

The binder, the flavoring agent, and the lipid, if necessary, and other additives are added to and mixed with the pulverized tobacco raw material (for example, tobacco particles). The mixing is preferably dry mixing, and therefore a stirrer is preferably used as the mixer. Next, a medium such as water and, if necessary, an aerosol-generating substrate such as glycerin are added to the dry mixture, and mixed with a stirrer to prepare wet powder (wet powder). The amount of the medium in the wet powder may be 20 to 80 mass%, preferably 20 to 40 mass%, and may be appropriately adjusted according to step 2. For example, the amount of the medium may be 20 to 50 mass% in the case of the compression-expansion in step 2, or 20 to 80 mass% in the case of the extrusion. The solid content concentration of the wet powder is preferably 50 to 90 mass%.

3) Mixing

The wet powder is kneaded using a kneader (for example, DG-1 manufactured by DALTON Co.). The kneading is preferably carried out in whole until the whole medium is completely filled, for example, it is preferable to knead until the color of the mixture becomes uniform when observed with naked eyes.

(2) Step 2

In this step, the mixture (wet powder) is pressed or extruded from a die to prepare a wet sheet. For example, the mixture may be sandwiched between 2 sheets of base film and passed between a pair of rolls using a calender apparatus (e.g., yuri Roll Machine company) until a given thickness (greater than 100 μm) is reached, and subjected to calendaring, resulting in a laminate in which wet sheets are present between 2 sheets of base film. The base film is preferably a non-adhesive film such as a fluorine-based polymer film. The nip of the rolls can be performed a plurality of times. Alternatively, the above mixture (wet powder) may be extruded from a die (preferably a T die) having a predetermined gap to form a wet sheet on a substrate. As the substrate, a known substrate such as a glass plate, a metal plate, or a plastic plate can be used. The extrusion may be performed using a known extruder.

(3) Step 3

In this step, the wet sheet is dried. For example, the laminate may be subjected to the present step as follows. 1) One substrate film was peeled off. 2) The laminate was dried using a through-air dryer. The drying temperature may be room temperature, preferably 50 to 100 ℃, and the drying time may be set to 1 to 2 minutes. 3) Then, the remaining base film was peeled off, and further dried under the above conditions to obtain a tobacco sheet. By drying in this way, the tobacco sheet can be prevented from adhering to other substrates. The tobacco sheet thus obtained is also referred to as a "laminate sheet". The laminated sheet is preferable because the laminated sheet has a smooth surface and can suppress the occurrence of leakage of cut tobacco when it comes into contact with other members. The method is suitable for producing sheets having a thickness of 300 μm or less.

In the case of extrusion molding, the wet sheet on the substrate is air-dried or heated and dried. The drying conditions are as described above. The tobacco sheet thus obtained is also referred to as an "extruded sheet". The extruded sheet is preferable because the surface is smooth and the occurrence of leakage of cut tobacco can be suppressed when the extruded sheet is in contact with other members. The method is suitable for manufacturing sheets with a thickness of 200 μm or more.

[ Mode 2]

The tobacco sheet in the present embodiment comprises a tobacco material and a cellulose derivative having a substitution degree of 0.65 or more as a binder.

(1) Adhesive agent

In this embodiment, a cellulose derivative having a substitution degree of 0.65 or more is used as the binder. Cellulose derivatives refer to cellulose modified with the-OH group of the glucopyranose residue. Products in which the-OH groups are modified to-OR groups (R is an organic group) are also known as cellulose ethers, products in which the-OX groups (X is a group derived from an acid) are also known as cellulose esters, and both can be used in the present invention.

The degree of substitution is the number of substituents per 1 glucopyranose residue, i.e. the number of modified OH groups. The substitution degree used in the present invention is preferably 0.65 or more, more preferably 0.7 or more, and still more preferably 0.8 or more. The upper limit of the substitution degree is preferably 3.0 or less, more preferably 2.0 or less, further preferably 1.6 or less, particularly preferably 1.0 or less.

The degree of substitution can be determined by known methods. For example, the degree of substitution can be determined by the methanol nitrate method. The method comprises the following steps: 1) About 2.0g of the sample was precisely weighed and placed in a 300ml Erlenmeyer flask with a stopper. 100ml of methanol nitrate (a liquid obtained by adding 100ml of extra concentrated nitric acid to 1g of absolute methanol) was added, and the mixture was shaken for about 2 hours to convert the terminal acid group from a salt form to a hydrogen form (for example, from COONa to COOH). 2) The sample was filtered through a glass filter 1G3, washed with 200ml of 80% methanol, and dried at 105℃for 2 hours. 3) The absolute dry sample was weighed precisely to about 1 to 1.5g, and then added to a 300ml Erlenmeyer flask with a stopper, wet with 150ml of 80% methanol, and then added with 50ml of 0.1N NaOH, and the mixture was shaken at room temperature for 2 hours. Excess NaOH was back titrated with 0.1N sulfuric acid using phenolphthalein as an indicator. 4) The substitution degree was determined by the following formula.

Degree of substitution=0.162A/(1-0.058a)

A=50×f' -the above sulfuric acid amount (ml) ×f/absolute dry sample mass (g) ×0.1

F: coefficient of the sulfuric acid

F': coefficient of NaOH

In the cellulose ethers, at most 3R are present, and each R may be the same or different. As R, there may be mentioned: straight-chain or branched-chain alkyl groups of C1 to C3 such as methyl, ethyl and propyl; a C1-C3 linear or branched hydroxyalkyl group such as hydroxymethyl, hydroxyethyl or hydroxypropyl; arylalkyl groups having 7 to 20 carbon atoms such as benzyl and trityl; cyanoalkyl groups such as cyanoethyl groups; carboxyalkyl groups such as carboxymethyl and carboxyethyl; aminoalkyl such as aminoethyl. Among them, R is preferably a carboxyalkyl group, more preferably a carboxymethyl group. The degree of substitution of cellulose ethers is also referred to as etherification degree.

In cellulose esters, at most 3X's are present, and each X may be the same or different. As X, there may be mentioned: a group derived from a C0 to C4 carboxylic acid such as formic acid, acetic acid, propionic acid, butyric acid, etc.; a group derived from a C6 to C10 aromatic carboxylic acid such as benzoic acid or phthalic acid; a sulfonic acid group derived from p-toluenesulfonic acid or the like; groups derived from inorganic acids such as nitric acid, sulfuric acid, phosphoric acid, and the like; a group derived from xanthogen. The degree of substitution of cellulose esters is also referred to as the degree of esterification.

Since the cellulose derivative has high hydrophilicity, when it is used as a binder, affinity with tobacco materials is improved. As a result, the strength of the tobacco sheet is improved, and the cut tobacco is less likely to leak out during use.

Furthermore, the cellulose derivatives described above are soluble in organic solvents, in particular ethanol. Therefore, when a mixture containing ethanol as a medium is used in the production of tobacco sheets as described later, the viscosity of the mixture can be reduced, and therefore, the mixture is advantageous in terms of transportation, coating process, and the like at the time of production as compared with a mixture containing water as a medium. Further, ethanol is more volatile than water, and thus, in the above production method, the production time can be shortened, and the energy cost at the time of drying can be reduced.

The amount of the cellulose derivative in the tobacco sheet is not particularly limited, but is preferably 0.1 to 10% by mass, more preferably 1 to 5% by mass, and further 2 to 4% by mass, based on the dry mass of the tobacco sheet (the mass excluding the mixed water, which will be the same hereinafter). When the amount of the binder exceeds the upper limit value or falls below the lower limit value, the above-mentioned effects may not be sufficiently exhibited.

Specific examples of cellulose derivatives are shown below.

Cellulose ethers: methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxymethylethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, benzylcellulose, triphenylmethylcellulose, cyanoethylcellulose, carboxymethylcellulose, carboxyethylcellulose, aminoethylcellulose.

Cellulose esters: organic acid esters such as cellulose acetate, cellulose formate, cellulose propionate, cellulose butyrate, cellulose benzoate, cellulose phthalate, and tosyl cellulose; inorganic acid esters such as nitrocellulose, cellulose sulfate, cellulose phosphate, and cellulose xanthate.

(2) Tobacco material

In this embodiment, the tobacco material described in embodiment 1 may be used in addition to the fibrous tobacco material.

(3) Aerosol generating agent

In this embodiment, the tobacco sheet may contain the aerosol generating agent described in embodiment 1.

(4) Emulsifying agent

In this embodiment, the tobacco sheet may contain the emulsifier described in embodiment 1.

(5) Cellulose other than tobacco

In this embodiment, the tobacco sheet may contain cellulose other than tobacco. Examples of cellulose other than tobacco include cellulose fibers and cellulose powder described above, and cellulose derivatives not included as a binder.

(6) Spice

In this embodiment, the tobacco sheet may contain the flavor described in embodiment 1.

(7) Characteristics and morphology of tobacco sheet

1) Thickness of (L)

The thickness of the tobacco sheet in this embodiment is not limited, but in one embodiment is preferably 20 to 2000. Mu.m, more preferably 100 to 1500. Mu.m, and still more preferably 100 to 1000. Mu.m.

2) Strength of

The tobacco sheet of the present embodiment has a tensile stress of preferably 1.7N/mm or more, more preferably 2N/mm or more, and still more preferably 3N/mm or more.

3) Arithmetic average surface roughness Sa

The tobacco sheet of the present embodiment preferably has an arithmetic average surface roughness Sa of 0.03mm or less. The Sa is an index of surface roughness, and when the tobacco sheet of the present embodiment has Sa in the above range, cut tobacco leakage from the surface is reduced. From this viewpoint, the upper limit value of Sa is more preferably 0.02mm or less.

(8) Tobacco segment

Tobacco segments for smoking articles may be manufactured from tobacco sheets. The tobacco segment in this embodiment is as described in the description of embodiment 1.

[ Method of production ]

The tobacco sheet according to the present embodiment can be produced by any method, and preferably by a method comprising the following steps.

Step 1, preparing a mixture at least comprising a tobacco material, the cellulose derivative and a medium;

Step 2, spreading the mixture on a substrate to prepare a wet sheet; and

And step 3, drying the wet sheet.

(1) Step 1

In this step, a fibrous material, a tobacco material used as needed, a cellulose derivative as a binder, and a medium are mixed. Aerosol-generating substrates, emulsifiers or fragrances may also be added as desired. The amount of each component may be appropriately adjusted so that the above amounts can be achieved. The medium preferably contains, as a main component, a water-soluble organic solvent having a boiling point of less than 100 ℃, such as water or ethanol, more preferably water or ethanol. The method of mixing is not limited, and known devices such as a stirrer and a kneader may be used. The solid content concentration of the mixture obtained by mixing is not limited, and can be appropriately adjusted so as to be suitable for step 2. For example, the upper limit of the solid content concentration is preferably 98 mass% or less, 90 mass% or less, or 80 mass% or less, and the lower limit thereof is preferably 10 mass% or more, 20 mass% or more, 30 mass% or more, 40 mass% or more, or 50 mass% or more.

(2) Step 2

In this step, the above mixture is spread on a substrate to prepare a wet sheet. The substrate is not limited, and examples thereof include: inorganic material substrates such as glass plates, metal substrates such as aluminum plates, organic material substrates such as PET films and fluoropolymer films, fiber material substrates such as nonwoven fabrics, and the like. The method of spreading the mixture on the substrate is not limited, and there may be mentioned a rolling method of spreading using rolls, an extrusion method of extruding from a die, and a casting method of casting, as will be described later.

(3) Drying process

In this step, the wet sheet is dried. Drying may be performed according to a known method. For example, the wet sheet may be dried by air-drying at room temperature or by heating. The heating temperature is not limited either, and may be set to 60 to 150 ℃. And separating the dried sheet from the base material to obtain the tobacco sheet.

Hereinafter, a preferred embodiment of the method for producing a tobacco sheet according to the present embodiment will be described.

[ Calendering ]

1) Step 1

1-1) Pulverizing

The raw material (e.g., single leaf) is coarsely pulverized. Next, the mixture is subjected to micro-pulverization using a pulverizer (for example, ACM-5 manufactured by Hosokawa Micron Co., ltd.). The particle diameter (D90) after the fine pulverization is preferably 50 to 800. Mu.m. Particle size can be measured using a laser diffraction type particle size analyzer such as Mastersizer (manufactured by Malvern corporation).

1-2) Preparation of Wet powder

To the crushed tobacco raw material (for example, tobacco particles), additives such as a binder, a fibrous material, and optionally, a flavor and a lipid are added and mixed. The mixing is preferably dry mixing, and therefore a stirrer is preferably used as the mixer. Next, a medium such as water and an aerosol-generating substrate such as glycerin, if necessary, are added to the dry mixture, and mixed with a stirrer to prepare wet powder (wet powder). The amount of the medium in the wet powder may be 20 to 80% by mass, preferably 20 to 40% by mass, and may be 20 to 50% by mass because the compacting is performed in step 2. The solid content concentration of the wet powder is preferably 50 to 90 mass%.

1-3) Mixing

The wet powder is kneaded using a single-screw or multi-screw kneader such as kneader (DG-1, manufactured by DALTON Co., ltd.). The kneading is preferably carried out in whole until the whole medium is completely filled, for example, it is preferable to knead until the color of the mixture becomes uniform when observed with naked eyes.

2) Procedure 2 (Press spreading)

The kneaded mixture was sandwiched between 2 base films and passed between a pair of rolls using a calender apparatus (for example, manufactured by Yuri Roll Machine company) until a given thickness (more than 100 μm) was reached, and was subjected to press-stretching, to obtain a laminate in which wet sheets were present between 2 base films. The nip of the rolls can be performed a plurality of times. The base film is preferably a non-adhesive film such as a fluorine-based polymer film, and specifically, a teflon (registered trademark) film is exemplified.

3) Step 3

One of the substrate films in the laminate was peeled off. The laminate was dried using a through-air dryer. The drying temperature is preferably 50 to 100℃and the drying time may be set to 1 to 2 minutes. Then, the remaining base film was peeled off, and further dried under the above conditions to obtain a tobacco sheet. By drying in this way, the tobacco sheet can be prevented from adhering to other substrates.

The tobacco sheet obtained in the present method is also referred to as a "laminate sheet". The laminated sheet is preferable because the laminated sheet has a smooth surface and can suppress the occurrence of leakage of cut tobacco when it comes into contact with other members. The method is suitable for producing sheets having a thickness of 300 μm or less.

[ Extrusion method ]

1) Step 1

Step 1 in the present method is as described in the description of the rolling method. Wet powders (powders in wet state) were prepared. In the case of extrusion in step 2, the amount of the medium in the wet powder may be selected in the range of 20 to 80 mass%, and preferably 20 to 40 mass%.

2) Step 2

In this step, wet powder is extruded from a die set with a predetermined gap, and a wet sheet is formed on a substrate. The extrusion may be performed using a known extruder.

3) Step 3

In this step, the wet sheet is dried to obtain a tobacco sheet. The drying conditions are as described in the description of the calendering process. The tobacco sheet obtained in the present method is also referred to as an "extruded sheet". The extruded sheet is preferable because the surface is smooth and the occurrence of leakage of cut tobacco can be suppressed when the extruded sheet is in contact with other members. The method is suitable for manufacturing sheets with a thickness of 200 μm or more.

In addition, the sheet thus molded by applying pressure is referred to as a "pressure-molded sheet", and the "pressure-molded sheet" includes a "laminated sheet" and an "extruded sheet". The laminated sheet is a sheet obtained by compacting the mixture with a roller for 1 or more times to a target thickness and then drying to a target moisture content. The extruded sheet is a sheet obtained by extruding the mixture from a T die or the like at a target thickness and then drying the extruded sheet to a target moisture content. The combination of calendaring and extrusion may be performed in a press formed sheet. For example, the mixture may be further compressed to form a sheet after extrusion.

[ Casting method ]

1) Step 1

Step 1 in the present method may be performed by any method. For example, the mixture may be prepared by mixing a tobacco raw material having a desired particle size, a cellulose derivative, a medium, and additives added as needed using a stirrer or the like. The solid content concentration of the mixture obtained in this step is preferably about 3 to 15 mass%, and therefore the mixture is also referred to as a slurry.

2) Step 2

In this step, the slurry is cast onto a substrate to form a wet sheet. Casting may be performed as known.

3) Step 3

In this step, the wet sheet is dried to obtain a tobacco sheet. The drying conditions are as described in the description of the calendering process. The tobacco sheet obtained in the present method is also referred to as a "cast sheet".

Examples

Hereinafter, specific examples of the present embodiment will be described, but the present invention is not limited thereto.

Example 1

Tobacco flakes (tobacco leaves) were dry-pulverized with Hosokawa Micron ACM machine to obtain tobacco powder. The cumulative 90% particle diameter (D90) in the volume-based particle size distribution measured by the dry laser diffraction method was measured using a Mastersizer (trade name, manufactured by spectra company MALVERN PANALYTICAL, inc.), and found to be 200 μm.

Using the above tobacco powder as a tobacco raw material, a tobacco sheet was produced by a rolling method. Specifically, 77 parts by mass of the tobacco raw material, 12 parts by mass of glycerin as an aerosol generating agent, 1 part by mass of carboxymethyl cellulose as a molding agent, and 10 parts by mass of fibrous pulp (Canfor dry defibration of pulp) as a fibrous material were mixed and kneaded by an extrusion molding machine. The kneaded material was formed into a sheet by using 2 pairs of metal rolls, and dried in a heated air circulation oven at 80 ℃. The tobacco sheet was cut into dimensions of 0.8mm by 9.5mm using a chopper.

For cut tobacco sheets, the fluffiness was measured. Specifically, the cut tobacco sheet was left in a 60% room at 22℃for 48 hours, and then measured for fluffiness using DD-60A (trade name, manufactured by Borgward Co.). The cut tobacco sheet 15g was placed in a cylindrical container having an inner diameter of 60mm, and the volume at 30 seconds of compression was determined under a load of 3kg, and the measurement was performed. The results are shown in Table 1. In table 1, the bulk is expressed as a rate (%) of increase in bulk with respect to a reference value, based on the value of bulk of comparative example 1 described below.

Comparative example 1

Tobacco powder was prepared in the same manner as in example 1. Using the tobacco powder as a tobacco raw material, a tobacco sheet was produced by a rolling method. Specifically, 87 parts by mass of the tobacco raw material, 12 parts by mass of glycerin as an aerosol generating agent, and 1 part by mass of carboxymethyl cellulose as a molding agent were mixed and kneaded by an extrusion molding machine. The kneaded material was formed into a sheet by 2 pairs of metal rolls, and dried by a hot air circulation oven at 80 ℃. The tobacco sheet was cut into dimensions of 0.8mm by 9.5mm using a chopper. The cut tobacco sheet was measured for fluffiness in the same manner as in example 1. The results are shown in Table 1.

TABLE 1

	Bulk increase (%)
		Example 1	33
Comparative example 1	-

According to table 1, the tobacco sheet of example 1, which is a tobacco sheet of the present embodiment, was improved in fluffiness as compared with the tobacco sheet of comparative example 1 containing no fibrous material. Although the tobacco sheet was produced by the rolling method in example 1, the bulk was also improved when the tobacco sheet was produced by the casting method in the same manner.

Reference example A1

Tobacco leaves were pulverized using a pulverizer (ACM-5 manufactured by Hosokawa Micron Co.) so that D90 was 204 μm and D50 was 66. Mu.m, to obtain tobacco particles. D90 and D50 were measured by Mastersizer (manufactured by Malvern corporation). Tobacco particles and Sunrose F HC (cellulose ether manufactured by japan paper co.) as a binder were dry-mixed using a stirrer. Next, glycerin as an aerosol-generating substrate and water as a medium were added to the dry mixture, and mixed with a stirrer to prepare wet powder. The blending of the components is shown in Table A1.

The wet powder was kneaded 6 times at room temperature using a kneader (DG-1, manufactured by DALTON Co.) to obtain a mixture. The T die was used as the die, and the screw speed was set at 38.5rpm.

The wet powder was sandwiched between 2 sheets of Teflon (registered trademark) film (NITOFLON (R) No.900UL, manufactured by Nito electric Co., ltd.) and subjected to 4-stage rolling using a calender device (manufactured by Yuri Roll Machine Co.) until a given thickness (more than 100 μm) was reached, and a laminate having a layer structure of film/wet sheet/film and a thickness of 105 μm was produced. The roller gaps of stages 1 to 4 were 650. Mu.m, 330. Mu.m, 180. Mu.m, and 5. Mu.m, respectively. The roll gap of stage 4 is thicker than the thickness of the resulting sheet, since the sheet released from the pressure between the rolls expands to around the final thickness.

1 Piece of Teflon (registered trademark) film was peeled off from the laminate and dried at 80℃for 1 to 2 minutes using a through-air dryer. Next, another 1 film was peeled off, and the wet sheet was dried under the same conditions to produce a tobacco sheet according to the present embodiment, which was evaluated.

The mass of the wet powder in table A1 represents the dry mass of the tobacco crushed material, glycerin, and binder, and the water represents the total of the input mass and the mass of the moisture contained in the tobacco crushed material, glycerin, and binder.

Reference examples A2 and A4

Tobacco sheets were produced and evaluated in the same manner as in reference example A1, except that Sunrose F MC and Sunrose F LC were used instead of Sunrose F HC (cellulose ether manufactured by japan paper corporation) as the binder.

Reference example A3

Tobacco sheets were produced and evaluated in the same manner as in reference example A1, except that Sunrose F MC was used, the blending amount thereof was changed as shown in table A3, instead of Sunrose F HC (cellulose ether manufactured by japan paper corporation) as a binder, and the amount of glycerin was changed to 15.5DB mass% based on the mass ratio charged.

Reference comparative example A1

Tobacco particles having a D90 of 204 μm and a D50 of 66 μm were obtained by the same method as in reference example A1. The same ingredients as in reference example A1 and pulp were mixed by a stirrer to obtain a mixture. Tobacco sheets were manufactured according to a casting method using the mixture by a conventional method.

Reference comparative example A2

Tobacco sheets were manufactured using a paper making process according to conventional methods. Specifically, water-soluble components of a tobacco raw material are extracted with water, the extraction residue, pulp and water are mixed, the mixture is pulped using a grinder, a sheet is formed by a paper machine, the sheet is dried, and the extract and glycerin are added to the sheet. The tobacco sheet was evaluated by the same method as in reference example A1. The composition of the tablets is shown in Table A2. The evaluation results of the tobacco sheets produced in the above examples are shown in table A3.

[ Table A2]

Table A2 Cooperation

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The evaluation method will be described below.

[ Tobacco shred leakage volume ]

Cut tobacco was produced by cutting the tobacco sheets produced in each example. The tobacco rod was filled at 70% by volume into a wrapper 22 of length 12mm and diameter 7mm to prepare a tobacco segment 20A. Next, a flavor-absorbing article 1 shown in fig. 1 having the tobacco-containing segment was prepared. The system shown in fig. 2 (in which the internal heating type is set) was prepared and supplied to a smoking test (14 puffs, CIR conditions, constant heating at 350 ℃) using a smoking machine. Following the smoking test, the cut tobacco is gently removed from the tobacco section 20A. Next, the wrapping material 22 was refilled with fresh tobacco at the above volume%, and subjected to the 2 nd smoking test. The total of 20 smoking tests were performed in this manner, and the total tobacco shred leakage volume remaining in the packaging material 22 was measured.

[ Surface roughness ]

The measurement was performed by using a microscope (VK-X100 manufactured by KEYENCE Co., ltd.) in accordance with the following procedure.

1) Setting the focal position of the lowest part of the sheet

2) Setting the focal position of the highest part of the sheet

3) The sections obtained in 1) and 2) are separated, and the imaging is performed while shifting the focus one by one

4) Determining the height from the difference between the focal position of each part and the focal position of the lowest part

5) Roughness is calculated (automatically calculated by a meter software) from the height data of each position, and arithmetic surface roughness Sa is calculated

[ Tensile Strength, elongation ]

The obtained sheet was cut into pieces 15mm wide by 180mm long, and the pieces were subjected to a tensile strength tester (Stroggraph E-S, manufactured by Toyo Seisakusho Co., ltd.) at ROADRANGE: 25. SPEEDRANGE:50, and the tensile strength was evaluated by tensile stress.

Reference example B1

Tobacco leaves were pulverized into 50-800 μm D90 using a pulverizer (ACM-5 manufactured by Hosokawa Micron Co., ltd.) to obtain tobacco particles. D90 was measured by Mastersizer (manufactured by Malvern). Tobacco particles and carboxymethyl cellulose (Sunrose F F MC, manufactured by Nippon paper Co., ltd.) as a binder were dry-mixed using a stirrer. Next, glycerin as an aerosol-generating substrate and water as a medium were added to the dry mixture, and mixed with a stirrer to prepare wet powder. The blending of the components is as follows.

The mass of the wet powder in table B1 represents the dry mass of the tobacco crushed material, glycerin, and binder, and the water represents the total of the input mass and the mass of the moisture contained in the tobacco crushed material, glycerin, and binder.

The wet powder was kneaded 6 times at room temperature using a kneader (DG-1, manufactured by DALTON Co.) to obtain a mixture. The die shape was T-shaped (T-die), and the screw speed was set at 38.5rpm.

1 Piece of Teflon (registered trademark) film was peeled off from the laminate and dried at 80℃for 1 to 2 minutes using a through-air dryer. Next, another 1 film was peeled off, and the wet sheet was dried under the same conditions, to produce a tobacco sheet of the present embodiment.

Reference examples B2 to B5

Tobacco sheets were produced and evaluated in the same manner as in reference example B1, except that carboxymethyl cellulose (manufactured by japan paper corporation) shown in table B2 was used as a binder.

Reference comparative example B1

Tobacco sheets were produced and evaluated in the same manner as in reference example B1, except that carboxymethyl cellulose (manufactured by japan paper corporation) shown in table B2 was used as the binder. The results are shown in Table B3. In the table, the physical properties of the finished sheet represent the physical properties of the sheet produced by drying as described above and not dried to an absolute dry state.

[ Table B2]

Table B2 composition and physical Properties of the tablet

The value claimed by the manufacturer

Manufacturer's stated value (0D 1% aqueous viscosity)

[ Table B3]

Table B3 physical properties of the sheet

The evaluation method will be described below.

[ Tobacco shred leakage volume ]

Cut tobacco pieces prepared in each example were cut to prepare cut tobacco. The tobacco-containing segment 20A was prepared by filling 70% by volume of the tobacco into a wrapper 22 of 12mm length and 7mm diameter. Next, a flavor-absorbing article 1 shown in fig. 1 having the tobacco-containing segment was prepared. The system shown in fig. 2 (in which the internal heating type is set) was prepared and supplied to a smoking test (14 puffs, CIR conditions, constant heating at 350 ℃) using a smoking machine. Following the smoking test, the cut tobacco is gently removed from the tobacco section 20A. Next, the wrapping material 22 was refilled with fresh tobacco at the above volume%, and subjected to the 2 nd smoking test. The total of 20 smoking tests were performed in this manner, and the total tobacco shred leakage volume remaining in the packaging material 22 was measured.

[ Surface roughness ]

1) Setting the focal position of the lowest part of the sheet

2) Setting the focal position of the highest part of the sheet

[ Coagulability after heating ]

A non-combustion internal heating type smoking system was prepared according to the conditions described in the cut tobacco escape volume, and 1 smoking test was performed under the same conditions. After the test, the tobacco segment 20A was taken out from the system, the jig was pressed at a position 6mm in the longitudinal direction from the tip, compressed at a constant speed in the radial direction, and the load (N) at the time when the jig reached the position 3.5mm was determined, whereby the solidification after heating was evaluated. The higher the load value, the easier the cut tobacco is stuck after heating, so the less the cut tobacco is likely to leak out.

[ Tensile Strength ]

[ Degree of substitution ]

The measurement was performed by the above-described measurement method.

Hereinafter, embodiments are shown.

[1] A tobacco sheet for a non-combustion heated flavor inhaler comprising a fibrous material.

[2] The tobacco sheet for a non-combustion heating type flavor inhaler according to item [1], wherein the fibrous material is contained in an amount of 5 to 50% by mass in 100% by mass of the tobacco sheet.

[3] The tobacco sheet for a non-combustion heating type flavor inhaler according to [1] or [2], wherein the fibrous material is at least one selected from the group consisting of fibrous pulp, fibrous tobacco material and fibrous synthetic cellulose.

[4] The tobacco sheet for a non-combustion heating type flavor inhaler according to [3], wherein the fibrous material is fibrous pulp.

[5] The tobacco sheet for a non-combustion heating type flavor inhaler according to [4], wherein the tobacco sheet further comprises a tobacco raw material.

[6] The method of producing a tobacco sheet for a non-combustion heating type flavor inhaler according to item [5], wherein the tobacco material is a tobacco powder of at least one selected from the group consisting of tobacco leaves, veins and residual stems.

[7] The tobacco sheet for a non-combustion heating type flavor inhaler according to [5] or [6], wherein the proportion of the tobacco raw material contained in 100 mass% of the tobacco sheet is 30 to 91 mass%.

[8] The tobacco sheet for a non-combustion heating type flavor inhaler according to any one of [4] to [7], wherein the tobacco sheet further comprises a molding agent.

[9] The tobacco sheet for a non-combustion heating type flavor inhaler according to item [8], wherein the molding agent is at least one selected from the group consisting of polysaccharides, proteins and synthetic polymers.

[10] The tobacco sheet for a non-combustion heating type flavor inhaler according to [8] or [9], wherein the proportion of the molding agent contained in 100 mass% of the tobacco sheet is 0.1 to 15 mass%.

[11] The tobacco sheet for a non-combustion heating type flavor inhaler according to any one of [1] to [10], wherein the tobacco sheet further comprises an aerosol generator.

[12] The tobacco sheet for a non-combustion heating type flavor inhaler according to item [11], wherein the aerosol generating agent is at least one selected from the group consisting of glycerin, propylene glycol and 1, 3-butylene glycol.

[13] The tobacco sheet for a non-combustion heating type flavor inhaler according to [11] or [12], wherein the proportion of the aerosol-generating agent contained in 100 mass% of the tobacco sheet is 5 to 50 mass%.

[14] A non-combustion heating type flavor aspirator comprising a tobacco-containing segment comprising the non-combustion heating type flavor aspirator tobacco sheet of any one of [1] to [13 ].

[15] A non-combustion heated flavor pumping system, comprising:

[14] The non-combustion heating type flavor aspirator and

And a heating device for heating the tobacco-containing section.

[1A] a tobacco sheet comprising a tobacco material and a binder, wherein at least one surface of the tobacco sheet has an arithmetic average surface roughness Sa of 5-30 [ mu ] m.

[2A] the sheet according to [1A ], which is a pressure-formed sheet.

[3A] The sheet according to [1A ] or [2A ], wherein the amount of the binder blended is 6 mass% or less in terms of dry mass with respect to the dry mass of the tobacco sheet.

[4A] The tobacco sheet according to [1A ], wherein the arithmetic average surface roughness Sa of both surfaces thereof is 5 to 30 μm.

[5A] the sheet according to any one of [1A ] to [4A ], which has a tensile elongation of 5 to 15%.

[6A] the non-combustion heating type smoking article according to any one of [1A ] to [5A ], comprising a tobacco sheet or a material derived from the tobacco sheet.

[7A] The method for producing a sheet according to any one of [1A ] to [5A ], comprising:

Step 1, at least mixing tobacco material, binder and medium to prepare a mixture;

Step 2, compacting or extruding the mixture from a die head to prepare a wet sheet; and

And step 3, drying the wet sheet.

[8A] the method according to [7A ], wherein the step 2 comprises: laminates were prepared with wet sheets between 2 substrate films.

[9A] the production method according to [7A ] or [8A ], wherein the step 1 comprises: at least the tobacco material, binder and medium are mixed by a single screw or multi-screw mixer.

[10A] the production method according to any one of [7A ] to [9A ], wherein the mixture contains 20 to 80% by mass of the medium relative to the total amount of the mixture.

[1B] a tobacco sheet, comprising:

Tobacco material

Cellulose derivative having a degree of substitution of 0.65 or more.

[2B] The sheet according to [1B ], wherein the substitution degree is 0.7 or more.

[3B] the sheet according to [2B ], wherein the substitution degree is 0.8 or more.

[4B] the sheet according to any one of [1B ] to [3B ], wherein the cellulose derivative is carboxyalkylated cellulose.

[5B] The sheet according to any one of [1B ] to [4B ], wherein the arithmetic average surface roughness Sa is 0.03mm or less.

[6B] The sheet according to any one of [1B ] to [5B ], which is a pressure-formed sheet.

[7B] The method for producing a sheet according to any one of [1B ] to [6B ], comprising:

Step 2, spreading the mixture on a substrate to prepare a wet sheet; and

And step3, drying the wet sheet.

[8B] The production method according to [7B ] or [8B ], wherein the step 1 comprises: the tobacco material, the cellulose derivative and the medium are kneaded by a single-screw or multi-screw kneader.

[9B] the production method according to [7B ] or [8B ], wherein the step 2 comprises: the mixture is either pressed with rollers or extruded from a die.

[10B] the method according to [9B ], wherein the step 2 comprises: laminates were prepared with wet sheets between 2 substrate films.

[11B] A non-combustion heating type smoking article comprising the tobacco sheet of any one of [1B ] to [6B ] or a material derived from the tobacco sheet.

Claims

1. A tobacco sheet for a non-combustion heated flavor inhaler comprising a fibrous material.

2. The sheet according to claim 1, wherein at least one surface thereof has an arithmetic average surface roughness Sa of 5 to 30 μm.

3. A sheet according to claim 1 or 2, which is a compression molded sheet.

4. The sheet according to any one of claims 1 to 3, which comprises a cellulose derivative having a degree of substitution of 0.65 or more.

5. The sheet according to claim 4, wherein the substitution degree is 0.7 or more.

6. A non-combustion heating type flavor aspirator comprising a tobacco-containing segment including the non-combustion heating type flavor aspirator tobacco sheet according to any one of claims 1 to 5.

7. A non-combustion heated flavor pumping system, comprising:

The non-combustion heating type flavor aspirator of claim 6, and

Heating means for heating said tobacco-containing segment.