Tobacco sheet for non-combustion heating type fragrance attractor, method for manufacturing the same, non-combustion heating type fragrance attractor, and non-combustion heating type fragrance attracting system

Abstract

Provided is a tobacco sheet for a non-combustion heating-type flavor inhaler including a tobacco material, wherein a cross-section of the tobacco sheet in the thickness direction has a wavy shape.

Description

Technical Field

[0001] The present invention relates to a tobacco sheet for a non-combustion heating type flavor attractor, a method for manufacturing the same, a non-combustion heating type flavor attractor, and a non-combustion heating type flavor attracting system.

Background Art

[0002] In a combustion type flavor attractor (cigarette), a tobacco filler containing tobacco leaves or a tobacco sheet is burned to obtain a flavor. For example, Patent Document 1 discloses a tobacco sheet used for a combustion type flavor attractor. As an alternative to the combustion type flavor attractor, a non-combustion heating type flavor attractor that heats a flavor source such as a tobacco sheet instead of burning it to obtain a flavor has been proposed. The heating temperature of the non-combustion heating type flavor attractor is lower than the combustion temperature of the combustion type flavor attractor, for example, about 400°C or lower. Thus, since the heating temperature of the non-combustion heating type flavor attractor is low, an aerosol generating agent can be added to the flavor source in the non-combustion heating type flavor attractor from the viewpoint of increasing the amount of smoke. The aerosol generating agent vaporizes by heating to generate an aerosol. Since the aerosol is supplied to the user along with flavor components such as tobacco components, the user can obtain a sufficient flavor.

[0003] The non-combustion heating type flavor attractor can include, for example, a tobacco-containing segment filled with a tobacco sheet or the like, a cooling segment, and a filter segment. The axial length of the tobacco-containing segment of the non-combustion heating type flavor attractor is usually shorter than the axial length of the tobacco-containing segment of the combustion type flavor attractor in relation to the heating heater. Therefore, in the non-combustion heating type flavor attractor, in order to ensure the amount of aerosol generated during heating, a large amount of tobacco sheet is filled in the short tobacco-containing segment. In order to fill a large amount of tobacco sheet in a short section, a tobacco sheet having a low bulking property, that is, a high density, is usually used in the non-combustion heating type flavor attractor. Note that the bulking property is a value indicating the volume when the cut of a tobacco sheet of a predetermined mass is compressed at a constant pressure for a constant time.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when the present inventors considered the heating method, the heating capacity of the heater, and the generation of aerosol, they found that when using a tobacco sheet with low bulking property (high density), the total heat capacity of the tobacco-containing segment becomes high. Depending on the heating method and the capacity of the heater, the tobacco sheet filled in the tobacco-containing segment may not sufficiently contribute to aerosol generation. To solve this problem, it is conceivable to reduce the total heat capacity of the tobacco-containing segment.

[0006] The present inventors considered (1) reducing the specific heat of the tobacco raw material contained in the tobacco sheet and (2) using a tobacco sheet with high bulking property (low density) in order to reduce the total heat capacity of the tobacco-containing segment. However, regarding (1), it is difficult to reduce the specific heat of the tobacco raw material itself, so it was considered effective to reduce the total heat capacity of the tobacco-containing segment by (2). Therefore, the development of a tobacco sheet with high bulking property (low density) that is preferably used in a non-combustion heating type flavor inhaler is desired.

[0007] An object of the present invention is to provide a tobacco sheet for a non-combustion heating type flavor inhaler having high bulking property, a non-combustion heating type flavor inhaler including the tobacco sheet, and a non-combustion heating type flavor inhalation system.

Means for Solving the Problems

[0008] The present invention includes the following embodiments. Aspect 1 A tobacco sheet for a non-combustion heating type flavor inhaler containing a tobacco raw material, wherein a cross-section in the thickness direction of the tobacco sheet has a corrugated shape. Aspect 2 The sheet according to aspect 1, wherein at least one of the arcuate surfaces present on the front surface and the arcuate surface present on the back surface of the sheet has a surface arithmetic mean surface roughness Sa of 5 to 30 μm. Aspect 3 The sheet according to aspect 1 or 2, which is a pressure-formed sheet. Aspect 4 The sheet according to any one of aspects 1 to 3, comprising a cellulose derivative having a degree of substitution of 0.65 or more. Aspect 5 The sheet according to aspect 4, wherein the degree of substitution is 0.7 or more. Aspect 6 A tobacco segment comprising a tobacco sheet for a non-combustion heating type flavor attractor according to any one of aspects 1 to 5, A non-combustion heating type flavor attractor comprising the same. Aspect 7 The non-combustion heating type flavor attractor according to aspect 6, and A heating device for heating the tobacco segment, and A non-combustion heating type flavor attracting system comprising the same. Aspect 8 A method for manufacturing a tobacco sheet according to any one of aspects 1 to 5, comprising: preparing a mixture comprising a tobacco raw material, an aerosol generator, a first molding agent, and a second molding agent; rolling the mixture to form a rolled product; applying a corrugated shape while cutting the rolled product into strips by pressing a rotary roll blade against the rolled product; and a method comprising the same.

Advantages of the Invention

[0009] According to the present invention, it is possible to provide a tobacco sheet for a non-combustion heating type flavor attractor having high swelling properties, a non-combustion heating type flavor attractor comprising the tobacco sheet, and a non-combustion heating type flavor attracting system.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

[0011] [Tobacco Sheet for Non-Combustion Heating Type Flavor Inhaler] The tobacco sheet for a non-combustion heating type flavor inhaler according to this embodiment (hereinafter, also referred to as "tobacco sheet") contains a tobacco raw material, and the cross-section in the thickness direction of the tobacco sheet has a corrugated shape. Since the cross-sectional shape in the thickness direction of the tobacco sheet according to this embodiment is corrugated, it is bulky and has high swelling properties. Therefore, by using the tobacco sheet according to this embodiment, the total heat capacity of the tobacco-containing segment can be reduced, and the tobacco sheet filled in the tobacco-containing segment can sufficiently contribute to aerosol generation. Further, the tobacco sheet according to this embodiment preferably further contains an aerosol generator and one or more kinds of molding agents, and by setting the blending ratios of these within a predetermined range, the swelling properties of the tobacco sheet are further improved.

[0012] (Shape of the Tobacco Sheet) The tobacco sheet according to this embodiment has a corrugated shape in the cross-section in the thickness direction. That is, when the tobacco sheet according to this embodiment is cut in the thickness direction in a certain direction in the plane direction, the shape of the cross-section has a corrugated shape. The certain direction in the plane direction may be, for example, the longitudinal direction or the short-side direction of the tobacco sheet. Here, the "corrugated shape" is not particularly limited as long as it is a shape that undulates up and down, and the peak of the wave may have a linear shape or a curved shape. Also, the waves may be regular or irregular.

[0013] An example of the cross-sectional shape in the thickness direction of the tobacco sheet according to this embodiment is shown in Fig. 1(1). The tobacco sheet 1 shown in Fig. 1(1) has waves 2 in the cross-section in the thickness direction. The width w1 of the wave 2 is not particularly limited, but is preferably in the range of 0.1 to 10.0 mm. Also, the height w2 of the wave 2 is not particularly limited, but is preferably in the range of 0.1 to 5.0 mm. The thickness w3 of the tobacco sheet 1 is preferably in the range of 100 to 1000 μm. As shown in Fig. 1(1), the wave 2 may have a sawtooth shape 3. By the wave 2 having the sawtooth shape 3, the tips of the sawtooth shapes can contact each other in the mixture of the tobacco sheets to further form voids, and as a result, the bulking property can be further improved. The size of the tobacco sheet according to this embodiment in the plane direction is not particularly limited, but can be, for example, length: 5.0 to 40.0 mm, width: 0.5 to 2.0 mm. Fig. 1(2) will be described later.

[0014] (Tobacco raw material) As the tobacco raw material contained in the tobacco sheet according to the present embodiment, there is no particular limitation as long as it contains tobacco components, and examples thereof include tobacco powder and tobacco extract. Examples of the tobacco powder include leaf tobacco, midrib, and stalk. These may be used alone or in combination of two or more. By cutting these to a predetermined size, they can be used as tobacco powder. From the viewpoint of further improving the bulking property, it is preferable that the cumulative 90% particle diameter (D90) in the volume-based particle size distribution measured by the dry laser diffraction method is 200 μm or more. When the tobacco raw material is tobacco powder, the proportion of the tobacco powder contained in 100% by mass of the tobacco sheet is preferably 45 to 95% by mass, more preferably 50 to 93% by mass, and even more preferably 60 to 85% by mass. Examples of the tobacco extract include a tobacco extract obtained by crushing leaf tobacco, mixing and stirring this with a solvent such as water to extract water-soluble components from the leaf tobacco, and drying and concentrating the obtained water extract under reduced pressure.

[0015] (Aerosol generator) From the viewpoint of increasing the amount of smoke during heating, the tobacco sheet according to the present embodiment preferably further contains an aerosol generator. Examples of the aerosol generator include glycerin, propylene glycol, 1,3-butanediol, and the like. These may be used alone or in combination of two or more.

[0016] When the aerosol generator is contained in the tobacco sheet, the proportion of the aerosol generator contained in 100% by mass of the tobacco sheet is preferably 4 to 50% by mass. When the proportion of the aerosol generator is 4% by mass or more, sufficient aerosol can be generated during heating from the viewpoint of the amount. Also, when the proportion of the aerosol generator is 50% by mass or less, sufficient aerosol can be generated during heating from the viewpoint of the heat capacity. The proportion of the aerosol generator is more preferably 6 to 40% by mass, even more preferably 8 to 30% by mass, and particularly preferably 10 to 20% by mass.

[0017] (Molding agent) From the perspective of shape retention, the tobacco sheet according to this embodiment preferably further contains a molding agent. In particular, from the perspective of being able to fully balance the aerosol generating agent holding performance and the waveform shape maintaining performance of the tobacco sheet, the tobacco sheet according to this embodiment preferably further contains a first molding agent and a second molding agent. Here, the first molding agent and the second molding agent may have different types of molding agents, or may have the same type of molding agent but different forms. Examples of the first molding agent include polysaccharides, proteins, synthetic polymers, etc. Examples of polysaccharides include cellulose derivatives and naturally derived polysaccharides.

[0018] Examples of cellulose derivatives include cellulose ethers such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxymethylethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, benzyl cellulose, trityl cellulose, cyanoethyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, aminoethyl cellulose, etc.; organic acid esters such as cellulose acetate, cellulose formate, cellulose propionate, cellulose butyrate, cellulose benzoate, cellulose phthalate, cellulose tosylate, etc.; inorganic acid esters such as cellulose nitrate, cellulose sulfate, cellulose phosphate, cellulose xanthate, etc.

[0019] Examples of natural polysaccharides include plant-derived polysaccharides such as guar gum, tara gum, roasted bean gum, tamarind seed gum, pectin, gum arabic, tragacanth gum, karaya gum, ghatti gum, arabinogalactan, amashi seed gum, katha gum, psyllium seed gum, and sabaku yomogi seed gum; algal-derived polysaccharides such as carrageenan, agar, alginic acid, propylene glycol alginate, furcelleran, and nori extract; microbial-derived polysaccharides such as xanthan gum, gellan gum, curdlan, pullulan, Agrobacterium succinoglycan, welan gum, macrohomoopsis gum, and rhamsan gum; crustacean-derived polysaccharides such as chitin, chitosan, and glucosamine; and starches such as starch, sodium starch glycolate, pregelatinized starch, and dextrin.

[0020] Examples of proteins include cereal proteins such as wheat gluten and rye gluten. Examples of synthetic polymers include polyphosphoric acid, sodium polyacrylate, and polyvinylpyrrolidone. As the second molding agent, although different from the first molding agent, polysaccharides, proteins, synthetic polymers, etc. similar to the first molding agent can be used.

[0021] When the first molding agent is included in the tobacco sheet, the proportion of the first molding agent contained in 100% by mass of the tobacco sheet is preferably 0.1 to 15% by mass. When the proportion of the first molding agent is 0.1% by mass or more, the mixture of raw materials can be easily molded into a sheet shape. Also, when the proportion of the first molding agent is 15% by mass or less, other raw materials required to ensure the functions required for the tobacco-containing segment of the non-combustion heating type flavor attractor can be sufficiently used. The proportion of the first molding agent is more preferably 0.1 to 12% by mass, further preferably 0.1 to 10% by mass, and particularly preferably 0.1 to 7% by mass.

[0022] When the tobacco sheet contains a second molding agent, the proportion of the second molding agent contained in 100% by mass of the tobacco sheet is preferably 0.1 to 15% by mass. When the proportion of the second molding agent is 0.1% by mass or more, the raw material mixture can be easily molded into a sheet shape. Further, when the proportion of the second molding agent is 15% by mass or less, other raw materials for ensuring the functions required for the tobacco-containing segment of the non-combustion heating type flavor inhaler can be sufficiently used. The proportion of the second molding agent is more preferably 0.1 to 12% by mass, still more preferably 0.1 to 10% by mass, and particularly preferably 0.1 to 7% by mass.

[0023] In addition, when the first molding agent and the second molding agent are the same in type of molding agent but different in form, for example, the first molding agent can be powder and the second molding agent can be a solution or a slurry. For example, in the method for producing a tobacco sheet described later, the molding agent can be directly mixed as powder as the first molding agent, and the molding agent can be dispersed or swollen in a solvent such as water and mixed as the second molding agent. Even in such a method, the same effect as when two molding agents of different types are used can be obtained.

[0024] (Reinforcing agent) From the viewpoint of further improving physical properties, the tobacco sheet according to the present embodiment can further contain a reinforcing agent. Examples of the reinforcing agent include fibrous substances such as fibrous pulp and fibrous synthetic cellulose, and liquid substances having a surface coating function that form a film when dried, such as pectin suspension water. These may be used alone or in combination of two or more.

[0025] When the tobacco sheet contains a reinforcing agent, the proportion of the reinforcing agent contained in 100% by mass of the tobacco sheet is preferably 4 to 40% by mass. Within this range, other raw materials for ensuring the functions required for the tobacco-containing segment of the non-combustion heating type flavor inhaler can be sufficiently used. The proportion of the reinforcing agent is more preferably 4.5 to 35% by mass, and still more preferably 5 to 30% by mass.

[0026] (Humectant) From the perspective of quality retention, the tobacco sheet according to this embodiment can further contain a humectant. Examples of the humectant include sugar alcohols such as sorbitol, erythritol, xylitol, maltitol, lactitol, mannitol, and reduced maltose syrup. These may be used alone or in combination of two or more kinds.

[0027] When the tobacco sheet contains a humectant, the proportion of the humectant contained in 100% by mass of the tobacco sheet is preferably 1 to 15% by mass. When within this range, other raw materials for ensuring the functions required for the tobacco-containing segment of the non-combustion heating type flavor inhaler can be sufficiently used. The proportion of the humectant is more preferably 2 to 12% by mass, and even more preferably 3 to 10% by mass.

[0028] (Other components) In addition to the tobacco raw material, the aerosol generator, the molding agents (first and second molding agents), the reinforcing agent, and the humectant, the tobacco sheet according to this embodiment can contain flavoring agents such as fragrances and flavor enhancers, colorants, wetting agents, preservatives, diluents such as inorganic substances, etc., as necessary.

[0029] (Swelling property) The bulkiness of the tobacco sheet according to this embodiment is preferably 190 cc / 100 g or more. When the bulkiness is 190 cc / 100 g or more, the total heat capacity of the tobacco-containing segment of the non-combustion heating type flavor inhaler can be sufficiently reduced, and the tobacco sheet filled in the tobacco-containing segment can contribute to aerosol generation. More preferably, the bulkiness is 210 cc / 100 g or more, and even more preferably 230 cc / 100 g or more. The upper limit of the range of the bulkiness is not particularly limited, but for example, it can be 800 cc / 100 g or less. The bulkiness is a value measured by a DD-60A (trade name, manufactured by Borgward) after cutting the tobacco sheet into a size of 0.8 mm × 20 mm and storing it in a conditioning chamber at 22°C and 60% for 48 hours. The measurement is performed by placing 15 g of the cut tobacco sheet in a cylindrical container with an inner diameter of 60 mm and determining the volume when compressed with a 3 kg load for 30 seconds.

[0030] [Method for manufacturing tobacco sheet] The tobacco sheet according to this embodiment Manufacturing method can include, for example, a step of preparing a mixture containing a tobacco raw material, an aerosol generator, a first molding agent, and a second molding agent, a step of rolling the mixture to form a rolled product, and a step of applying a corrugated shape while cutting the rolled product into strips by pressing a rotary roll blade against it. The process of applying the corrugated shape is also referred to as a rippling process. For example, the tobacco sheet according to this embodiment can be manufactured by the following method.

[0031] (1) A step of mixing water, a tobacco raw material, an aerosol generator, first and second molding agents, and a reinforcing agent to obtain a mixture. (2) A step of feeding the mixture into a plurality of rolling rollers and rolling it to obtain a rolled product. (3) A step of pressing a rotary roll blade against the rolled product and applying a corrugated shape while cutting it into strips.

[0032] When the sheet cut into strips by the rotary roll blade is peeled off from the roll, a resistance force is applied, thereby imparting a corrugated shape and a serrated shape as shown in FIG. 1. When the rolled product is not cut by the rotary roll blade, for example, by peeling off the rolled product on the rolling roller with a doctor knife, a resistance force is applied when peeling off from the roll, and similarly, a corrugated shape and a serrated shape can be imparted. When manufacturing a tobacco sheet by the above method, the surface of the rolling roller may be heated or cooled according to the purpose, and the rotation speed of the rolling roller may be adjusted. Furthermore, by adjusting the interval between the rolling rollers, a tobacco sheet with a desired basis weight can be obtained.

[0033] [Non-combustion heating type flavor inhaler] The non-combustion heating type flavor inhaler according to the present embodiment includes a tobacco-containing segment including a tobacco sheet or the like according to the present embodiment. Since the non-combustion heating type flavor inhaler according to the present embodiment includes a tobacco-containing segment filled with a highly expandable tobacco sheet or the like according to the present embodiment, the total heat capacity of the tobacco-containing segment can be sufficiently reduced, and the tobacco sheet filled in the tobacco-containing segment can contribute to aerosol generation.

[0034] An example of the non-combustion heating type flavor inhaler according to the present embodiment is shown in FIG. 2. The non-combustion heating type flavor inhaler 4 shown in FIG. 2 includes a tobacco-containing segment 5 filled with a tobacco sheet or the like according to the present embodiment, a cylindrical cooling segment 6 having perforations 11 on the circumference, a center hole segment 7, and a filter segment 8. The non-combustion heating type flavor inhaler according to the present embodiment may have other segments in addition to the tobacco-containing segment, the cooling segment, the center hole segment, and the filter segment.

[0035] The axial length of the non-combustion heating type flavor attractor according to the present embodiment is not particularly limited, but is preferably 40 mm or more and 90 mm or less, more preferably 50 mm or more and 75 mm or less, and even more preferably 50 mm or more and 60 mm or less. Further, the circumferential length of the non-combustion heating type flavor attractor is preferably 16 mm or more and 25 mm or less, more preferably 20 mm or more and 24 mm or less, and even more preferably 21 mm or more and 23 mm or less. For example, an embodiment can be cited in which the length of the tobacco-containing segment is 20 mm, the length of the cooling segment is 20 mm, the length of the center hole segment is 8 mm, and the length of the filter segment is 7 mm. Note that the length of the filter segment can be selected within the range of 4 mm or more and 10 mm or less. Further, the ventilation resistance of the filter segment at that time is selected so as to be 15 mmH2O / seg or more and 60 mmH2O / seg or less per segment. These individual segment lengths can be appropriately changed according to manufacturing suitability, required quality, and the like. Furthermore, even if only the filter segment is arranged on the downstream side of the cooling segment without using the center hole segment, it can function as a non-combustion heating type flavor attractor.

[0036] (Tobacco-containing segment) The tobacco-containing segment 5 has the tobacco sheet according to the present embodiment filled in a wrapper (hereinafter also referred to as a wrapper). The method of filling the tobacco sheet into the wrapper is not particularly limited. For example, the tobacco sheet may be wrapped with a wrapper, or the tobacco sheet may be filled into a cylindrical wrapper. When the shape of the tobacco sheet has a longitudinal direction like a rectangular shape, the tobacco sheet may be filled so that the longitudinal direction is an unspecified direction in the wrapper, or may be aligned and filled so as to be in the axial direction of the tobacco-containing segment 5 or a direction perpendicular to the axial direction.

[0037] (Cooling segment) As shown in FIG. 2, an embodiment can be cited in which the cooling segment 6 is composed of a cylindrical member 10. The cylindrical member 10 may be, for example, a paper tube obtained by processing cardboard into a cylindrical shape.

[0038] The cylindrical member 10 and the mouthpiece lining paper 15 described later are provided with perforations 11 penetrating both of them. Due to the presence of the perforations 11, outside air is introduced into the cooling segment 6 during suction. As a result, the aerosol vaporization components generated by heating the tobacco-containing segment 5 come into contact with the outside air, and their temperature drops, causing liquefaction and forming an aerosol. The diameter (span length) of the perforations 11 is not particularly limited, and for example, it may be 0.5 mm or more and 1.5 mm or less. The number of the perforations 11 is not particularly limited and may be one or two or more. For example, a plurality of the perforations 11 may be provided on the circumference of the cooling segment 6.

[0039] The amount of outside air introduced from the perforations 11 is preferably 85% by volume or less, more preferably 80% by volume or less, based on the total volume of the gas sucked by the user. By the proportion of the outside air amount being 85% by volume or less, the reduction of the flavor due to dilution by the outside air can be sufficiently suppressed. Incidentally, this is also referred to as the ventilation ratio in another way. From the viewpoint of coolability, the lower limit of the range of the ventilation ratio is preferably 55% by volume or more, more preferably 60% by volume or more.

[0040] Further, the cooling segment may be a segment including a sheet of a suitable constituent material that is wrinkled, pleated, gathered, or folded. The cross-sectional profile of such an element may show randomly oriented channels. Also, the cooling segment may include a bundle of longitudinally extending tubes. Such a cooling segment can be formed, for example, by winding a pleated, gathered, or folded sheet material with a wrapper paper.

[0041] The axial length of the cooling segment can be, for example, 7 mm or more and 28 mm or less, and can be, for example, 18 mm. Also, the cooling segment can be substantially circular in its axial cross-sectional shape, and its diameter can be, for example, 5 mm or more and 10 mm or less, and can be, for example, about 7 mm.

[0042] (Center hole segment) The center hole segment is composed of a filling layer having one or more hollow parts and an inner plug wrapper (inner wrapping paper) covering the filling layer. For example, as shown in FIG. 2, the center hole segment 7 is composed of a second filling layer 12 having a hollow part and a second inner plug wrapper 13 covering the second filling layer 12. The center hole segment 7 has a function of enhancing the strength of the mouthpiece segment 9. The second filling layer 12 can be, for example, a rod with an inner diameter of φ1.0 mm or more and φ5.0 mm or less, which is filled with cellulose acetate fibers at a high density and a plasticizer containing triacetin is added in an amount of 6% by mass or more and 20% by mass or less based on the mass of the cellulose acetate and cured. Since the second filling layer 12 has a high fiber filling density, when sucking, air and aerosol will only flow through the hollow part, and hardly flow inside the second filling layer 12. Since the second filling layer 12 inside the center hole segment 7 is a fiber filling layer, the feel from the outside during use is less likely to cause discomfort to the user. Note that the center hole segment 7 may not have the second inner plug wrapper 13 and its shape may be maintained by thermoforming.

[0043] (Filter segment) The configuration of the filter segment 8 is not particularly limited, and it may be composed of one or more filling layers. The outside of the filling layer may be wound with one or more sheets of wrapping paper. The air permeability resistance per segment of the filter segment 8 can be appropriately changed according to the amount and material of the filling material filled in the filter segment 8. For example, when the filling material is cellulose acetate fibers, if the amount of cellulose acetate fibers filled in the filter segment 8 is increased, the air permeability resistance can be increased. When the filling material is cellulose acetate fibers, the filling density of the cellulose acetate fibers can be 0.13 - 0.18 g / cm 3 It can be. Note that the air permeability resistance is the value measured by an air permeability resistance measuring instrument (product name: SODIMAX, manufactured by SODIM).

[0044] The length around the filter segment 8 is not particularly limited, but is preferably 16 to 25 mm, more preferably 20 to 24 mm, and even more preferably 21 to 23 mm. The axial length of the filter segment 8 can be selected from 4 to 10 mm, and is selected so that its ventilation resistance is 15 to 60 mmH2O / seg. The axial length of the filter segment 8 is preferably 5 to 9 mm, and more preferably 6 to 8 mm. The cross-sectional shape of the filter segment 8 is not particularly limited, and can be, for example, circular, elliptical, polygonal, etc. Further, the filter segment 8 may contain a destructive capsule containing a fragrance, fragrance beads, or the fragrance may be directly added.

[0045] As shown in FIG. 2, the center hole segment 7 and the filter segment 8 can be connected by an outer plug wrapper (outer wrapping paper) 14. The outer plug wrapper 14 can be, for example, a cylindrical paper. Further, the tobacco-containing segment 5, the cooling segment 6, and the connected center hole segment 7 and filter segment 8 can be connected by a mouthpiece lining paper 15. These connections can be made, for example, by applying an adhesive such as vinyl acetate-based adhesive to the inner surface of the mouthpiece lining paper 15 and wrapping the three segments. Note that these segments may be connected in multiple times using a plurality of lining papers.

[0046] [Non-combustion heating type flavor suction system] The non-combustion heating type flavor suction system according to the present embodiment includes the non-combustion heating type flavor suction device according to the present embodiment and a heating device for heating the tobacco-containing segment of the non-combustion heating type flavor suction device. The non-combustion heating type flavor suction system according to the present embodiment may have other configurations in addition to the non-combustion heating type flavor suction device and the heating device according to the present embodiment.

[0047] An example of the non-combustion heating type flavor attracting system according to the present embodiment is shown in FIG. 3. The non-combustion heating type flavor attracting system shown in FIG. 3 includes a non-combustion heating type flavor attractor 4 according to the present embodiment and a heating device 16 that heats the tobacco-containing segment of the non-combustion heating type flavor attractor 4 from the outside.

[0048] FIG. 3(a) shows the state before the non-combustion heating type flavor attractor 4 is inserted into the heating device 16, and FIG. 3(b) shows the state where the non-combustion heating type flavor attractor 4 is inserted into the heating device 16 and heated. The heating device 16 shown in FIG. 3 includes a body 17, a heater 18, a metal tube 19, a battery unit 20, and a control unit 21. The body 17 has a cylindrical recess 22, and the heater 18 and the metal tube 19 are arranged at a position corresponding to the tobacco-containing segment of the non-combustion heating type flavor attractor 4 that is inserted into the recess 22 on the inner side surface of the recess 22. The heater 18 can be a heater by electric resistance, and power is supplied from the battery unit 20 according to an instruction from the control unit 21 that performs temperature control, and the heater 18 is heated. The heat generated from the heater 18 is transmitted to the tobacco-containing segment of the non-combustion heating type flavor attractor 4 through the metal tube 19 having a high thermal conductivity.

[0049] In FIG. 3(b), since it is schematically illustrated, there is a gap between the outer periphery of the non-combustion heating type flavor attractor 4 and the inner periphery of the metal tube 19, but actually, it is desirable that there is no gap between the outer periphery of the non-combustion heating type flavor attractor 4 and the inner periphery of the metal tube 19 for the purpose of efficiently transferring heat. Note that the heating device 16 heats the tobacco-containing segment of the non-combustion heating type flavor attractor 4 from the outside, but it may be one that heats from the inside.

[0050] The heating temperature by the heating device is not particularly limited, but it is preferably 400°C or lower, more preferably 150°C or higher and 400°C or lower, and even more preferably 200°C or higher and 350°C or lower. Note that the heating temperature indicates the temperature of the heater of the heating device.

[0051] Furthermore, excellent processability is required for tobacco sheets. Sheets manufactured by the papermaking method are composed of fibrous tobacco leaf residues, so although they are excellent in strength, the surface smoothness is not at a sufficient level. In addition, for sheets manufactured by the casting method, since a wet sheet in a state of being rich in moisture is dried, bubbles are generated on the surface due to steam generation during drying and the like. Furthermore, in the process of evaporation of moisture and shrinkage of the wet sheet, the smoothness is not at a sufficient level also due to the ends of the wet sheet becoming sparse. Also, when a fibrous material is blended, lumps are formed due to entanglement of the material, and this also impairs the smoothness of the sheet surface. Usually, tobacco sheets are subjected to processing such as forming and cutting and are used for smoking articles. During this processing, if the surface smoothness of the tobacco sheet is not sufficient, problems such as the sheet being damaged when it comes into contact with the processing apparatus may occur. Therefore, below, as a first aspect, a tobacco sheet having high bulking properties and excellent processability will be described.

[0052] In addition, conventional tobacco sheets have generated fine powder called so-called crumbling during use or after use, causing handling problems such as adhering to clothes. Therefore, if crumbling can be reduced, the handleability can be improved. Therefore, below, as a second aspect, a tobacco sheet having high bulking properties and reduced crumbling will be described.

[0053] [First Aspect] The tobacco sheet in this aspect contains at least a tobacco material and a binder.

[0054] (1) Binder The binder is a kind of the above-mentioned molding agent and is an adhesive for binding tobacco materials to each other or binding tobacco materials and other components. In this embodiment, known binders can be used. Examples of such binders include polysaccharides such as guar gum and xanthan gum, and cellulose derivatives such as CMC (carboxymethyl cellulose), CMC-Na (sodium salt of carboxymethyl cellulose), and HPC (hydroxypropyl cellulose). The upper limit of the binder content is preferably 6% by mass or less, and the lower limit is preferably 1% by mass or more, more preferably 3% by mass or more, based on the dry mass of the tobacco sheet (the mass excluding the water mixed in, the same hereinafter). If the amount of the binder exceeds the upper limit or is less than the lower limit, the above effects may not be sufficiently achieved.

[0055] Examples of the binder used in this embodiment include polysaccharides, proteins, and synthetic polymers. Specific examples thereof are shown below. In this embodiment, these binders can also be used in combination.

[0056] 1) Polysaccharides 1-1) Cellulose derivatives [Cellulose ethers] Methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxymethylethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, benzyl cellulose, trityl cellulose, cyanoethyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, aminoethyl cellulose [Cellulose esters] Organic acid esters: cellulose acetate, cellulose formate, cellulose propionate, cellulose butyrate, cellulose benzoate, cellulose phthalate, cellulose tosylate Inorganic acid esters: cellulose nitrate, cellulose sulfate, cellulose phosphate, cellulose xanthate

[0057] 1-2) Naturally occurring polysaccharides [Derived from plants] Guar gum, tara gum, roasted bean gum, tamarind seed gum, pectin, gum arabic, tragacanth gum, karaya gum, ghatti gum, arabinogalactan, amashi seed gum, cassia gum, psyllium seed gum, sabaku yomogi seed gum [Derived from algae] Carrageenan, agar, alginic acid, propylene glycol alginate, furcellaran, nori extract [Derived from microorganisms] Xanthan gum, gellan gum, curdlan, pullulan, Agrobacterium succinoglycan, welan gum, Macrophomina phaseolina gum, rhamsan gum [Derived from crustaceans] Chitin, chitosan, glucosamine [Starches] Starch, sodium starch glycolate, pregelatinized starch, dextrin

[0058] 2) Protein Wheat gluten, rye gluten

[0059] 3) Synthetic polymers Polyphosphoric acid, sodium polyacrylate, polyvinylpyrrolidone

[0060] (2) Tobacco materials The tobacco material used in this embodiment may be the aforementioned tobacco raw material. In this embodiment, specifically, dried and shredded tobacco leaves or leaf tobacco pulverized matter can be used. The leaf tobacco pulverized matter is particles obtained by pulverizing leaf tobacco. The D90 particle size of the leaf tobacco pulverized matter is preferably 200 μm or more as described above, but the upper limit is preferably 1000 μm or less, more preferably 50 to 500 μm. Also, the average particle size D50 can be preferably 20 to 1000 μm, more preferably 50 to 500 μm. Pulverization can be carried out using a known pulverizer, and either dry pulverization or wet pulverization may be used. Therefore, the leaf tobacco pulverized matter is also referred to as leaf tobacco particles. In this embodiment, the particle size is determined by the laser diffraction / scattering method, specifically measured using a laser diffraction particle size distribution measuring device (for example, Horiba LA-950). Also, the type of tobacco is not limited, and yellow variety, Burley variety, Oriental variety, indigenous variety, and other varieties belonging to Nicotiana tabacum system or Nicotiana rustica system can be used. The amount of the tobacco material in the tobacco sheet is not particularly limited, but in terms of dry mass, it is preferably 50 to 95% by mass, more preferably 60 to 90% by mass.

[0061] (3) Aerosol generating agent Also in this embodiment, known aerosol generating agents can be used. Examples thereof include polyhydric alcohols such as glycerin and propylene glycol (PG), and those with a boiling point exceeding 100 °C such as triethyl citrate (TEC) and triacetin. In this embodiment, the amount of the aerosol generating agent in the tobacco sheet is, in terms of dry mass (mass excluding the water mixed in, the same hereinafter), preferably 5 to 40% by mass, more preferably 10 to 20% by mass. If the amount of the aerosol generating agent exceeds the upper limit value, there may be a risk that the production of the tobacco sheet becomes difficult, and if it is less than the lower limit value, there may be a risk that the amount of smoke sensation decreases.

[0062] (4) Emulsifier In this embodiment, the tobacco sheet may contain an emulsifier. The emulsifier enhances the affinity between the aerosol generating agent, which is lipophilic, and the tobacco material, which is hydrophilic. Therefore, the addition of an emulsifier is effective particularly when a lipophilic aerosol generating agent is used. Known emulsifiers 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, in terms of dry mass, based on 100 parts by mass of the tobacco sheet.

[0063] (6) Flavor In this embodiment, the tobacco sheet may contain a flavor. A flavor is a substance that provides a scent and a taste. The flavor may be a natural flavor or a synthetic flavor. One type of flavor may be used, or a mixture of multiple types of flavors may be used. As the flavor, any flavor generally used in smoking articles can be used, and specific examples thereof will be described later. The flavor can be included in the sheet for smoking articles in an amount such that the smoking article can provide a preferable scent and taste. For example, the amount is preferably 1 to 30% by mass, more preferably 2 to 20% by mass, in the tobacco sheet.

[0064] The type of the fragrance is not particularly limited, and from the perspective of imparting a good fragrance feel, acetanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, Peru balsam oil, beeswax absolute, benzaldehyde, benzoin resinoid, benzyl alcohol, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, β-carotene, carrot juice, L-carvone, β-caryophyllene, cassia bark oil, cedarwood oil, celery seed oil, chamomile oil, cinnamaldehyde, cinnamic acid, cinnamyl alcohol, cinnamyl cinnamate, citronella oil, DL-citronellol, clary sage extract, cocoa, coffee, cognac oil, coriander oil, cumin aldehyde, davana oil, δ-decalactone, γ-decalactone, decanoic acid, dill herb oil, 3,4-dimethyl-1,2-cyclopentanedione, 4,5-dimethyl-3-hydroxy-2,5-dihydrofuran-2-one, 3,7-dimethyl-6-octenoic acid, 2,3-dimethylpyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl octanoate, ethyl oleate, ethyl palmitate, ethyl phenylacetate, ethyl propionate, ethyl stearate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3,(5 or 6)-Dimethylpyrazine, 5-Ethyl-3-hydroxy-4-methyl-2(5H)-furanone, 2-Ethyl-3-methylpyrazine, Eucalyptol, Fenugreek Absolute, Genoa Absolute, Gentian Root Infusion, Geraniol, Geranyl Acetate, Grape Juice, Guaiacol, Guava Extract, γ-Heptalactone, γ-Hexalactone, Hexanoic Acid, cis-3-Hexen-1-ol, Hexyl Acetate, Hexyl Alcohol, Hexyl Phenylacetate, Honey, 4-Hydroxy-3-pentenoic Acid Lactone, 4-Hydroxy-4-(3-hydroxy-1-butenyl)-3,5,5-trimethyl-2-cyclohexen-1-one, 4-(para-Hydroxyphenyl)-2-butanone, Sodium 4-Hydroxyundecanoate, Immortelle Absolute, β-Ionone, Isoamyl Acetate, Isoamyl Butyrate, Isoamyl Phenylacetate, Isobutyl Acetate, Isobutyl Phenylacetate, Jasmine Absolute, Kola Nut Tincture, Labdanum Oil, Lemon Terpeneless Oil, Licorice Extract, Linalool, Linalyl Acetate, Lovage Root Oil, Maltol, Maple Syrup, Menthol, Menthone, L-Menthyl Acetate, para-Methoxybenzaldehyde, Methyl-2-pyrrolylketone, Methyl Anthranilate, Methyl Phenylacetate, Methyl Salicylate, 4’-Methylacetophenone, Methylcyclopentenolone, 3-Methylvaleric Acid, Mimosa Absolute, Honeydew, Myristic Acid, Nerol, Nerolidol, γ-Nonalactone, Nutmeg Oil, δ-Octalactone, Octanal, Octanoic Acid, Orange Flower Oil, Orange Oil, Orris Root Oil, Palmitic Acid, ω-Pentadecalactone, Peppermint Oil, Petitgrain Paraguay Oil, Phenethyl Alcohol, Phenethyl Phenylacetate, Phenylacetic Acid, Piperonal, Plum Extract, Propenyl Guaiethol, Propyl Acetate, 3-Propylidenephthalide, Prune Juice, Pyruvic Acid, Raisin Extract, Rose Oil, Rum, Sage Oil, Sandalwood Oil, Spearmint Oil, Styrax Absolute, Marigold Oil, Tea Distillate, α-Terpineol, Terpinyl Acetate, 5,6,7,8-Tetrahydroquinoxaline, 1,5,5,9-Tetramethyl-13-oxacyclo(8.3.0.0(4.9))tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tridecanone, triethyl citrate, 4-(2,6,6-trimethyl-1-cyclohexenyl)-2-buten-4-one, 2,6,6-trimethyl-2-cyclohexene-1,4-dione, 4-(2,6,6-trimethyl-1,3-cyclohexadienyl)-2-buten-4-one, 2,3,5-trimethylpyrazine, γ-undecalactone, γ-valerolactone, vanilla extract, vanillin, veratraldehyde, violet leaf absolute, N-ethyl-p-menthane-3-carboxamide (WS-3), ethyl-2-(p-menthane-3-carboxamido)acetate (WS-5), sugars (such as sucrose, fructose, etc.), cocoa powder, carob powder, coriander powder, licorice powder, orange peel powder, rosehip powder, chamomile flower powder, lemon verbena powder, peppermint powder, leaf powder, spearmint powder, black tea powder, natural plant-based fragrances (such as jasmine oil, lemon oil, vetiver oil, rosemary oil), esters (such as menthyl acetate, isoamyl propionate, etc.), alcohols (such as phenylethyl alcohol, cis-6-nonen-1-ol, etc.) may be mentioned. These fragrances may be used alone or in combination of two or more kinds.,

[0065] (7) Characteristics and form of the tobacco sheet 1) Arithmetic mean surface roughness Sa In the tobacco sheet of this embodiment, when the surface between two vertices that determines the period of the waves in the cross-section is referred to as an arcuate curved surface, it is preferable that at least one of the two arcuate curved surfaces existing on the front and back surfaces of the sheet has an Sa of 5 to 30 μm. Fig. 1(2) shows the tobacco sheet of this embodiment. In the figure, the inner surface (the surface on the lower side of the paper) and the outer surface (the surface on the upper side of the paper) of the tobacco sheet in the region represented by a are arcuate curved surfaces. And in this embodiment, since there are a plurality of regions represented by a, the Sa of each region represented by a is measured and the average value thereof is taken as the Sa of the arcuate curved surface of the sheet. Fig. 1(2) shows the case where the waveform shape of the cross-section is arcuate, but even when the waveform shape of the cross-section is triangular, the surface between two vertices that determines the period of the waves is referred to as an arcuate curved surface. Sa is an index of surface roughness. When the arcuate curved surface of the tobacco sheet of this embodiment has an Sa within the above range, it has excellent workability and further reduces chipping from the surface. The reason for this is speculated as follows, although it is not limited. The waveform shape is formed by processing a sheet having an arithmetic mean surface roughness Sa within the above-mentioned range. Since the sheet is smooth, stress concentration hardly occurs on the sheet surface due to deformation during processing, and the generation of cracks (fissures and cracks) due to processing can be suppressed. Also, during the processing, the sheet having an arithmetic mean surface roughness Sa within the above-mentioned range comes into contact with the processing machine. Since the sheet is smooth, the damage due to contact is small, and the generation of exfoliated substances such as powder can be suppressed. From this viewpoint, Sa is more preferably 10 to 25 μm, and even more preferably 10 to 20 μm. In the tobacco sheet of this embodiment, it is preferable that the two arcuate curved surfaces have an Sa within the above range. Sa is measured by a known method, and the following preferred method is given. Measure using a microscope (for example, VK-X100 manufactured by KEYENCE) according to the following procedure. 1) Set the focal position of the lowest part of the measurement target part on the sheet 2) Set the focal position of the highest part of the measurement target part on the sheet 3) Divide the section obtained in 1) and 2) above, and image while shifting the focus little by little 4) Measure the height from the difference between the focal position of each part and the focal position of the lowest part 5) Calculate the roughness from the height data at each position (automatically calculated by the measuring machine software), and calculate the arithmetic surface roughness Sa.

[0066] 2) Thickness The thickness of the tobacco sheet is not limited, but in one aspect, it is preferably 20 to 2000 μm, more preferably 100 to 1500 μm, and even more preferably 100 to 1000 μm.

[0067] 3) Mechanical properties The tobacco sheet in this aspect preferably has an elongation at break of 2.0% or more, more preferably 3.0% or more, and even more preferably 5.0% or more. The upper limit of the elongation at break is not limited, but is usually about 15% or less. Also, the tobacco sheet preferably has a tensile stress of 2.0 N / mm or more, more preferably 2.5 N / mm or more, and even more preferably 3.0 N / mm or more.

[0068] 4) Handleability The smoothness of the arc-shaped curved surface of the tobacco sheet in this aspect affects the handleability of the product. For example, a smoking article using a tobacco sheet with poor smoothness of the arc-shaped curved surface may cause the sheet to break when contacting the processing device. Also, during or after its use, fine powder called so-called engraving may occur, and handling problems such as adhering to clothes may occur. However, since the arc-shaped curved surface of the tobacco sheet in this aspect is excellent in smoothness, the occurrence of such problems can be suppressed.

[0069] (8) Tobacco segment A tobacco segment for use in a smoking article can be manufactured from a tobacco sheet. The tobacco segment, in one embodiment, comprises a cylindrical wrapper and a tobacco sheet filled in a spiral shape within the wrapper (see Fig. 4(A)). In the figure, 200A is the tobacco segment, T is the tobacco sheet, and 220 is the wrapper, which is usually paper. The tobacco segment is preferably rod-shaped, and its length can be 15 - 80 mm and its diameter can be about 5 - 10 mm. Further, the tobacco segment 200A shown in Fig. 4(A) can be cut so that the aspect ratio (length / diameter) is about 0.5 - 1.2 (see Fig. 4(B)).

[0070] In another embodiment, the tobacco segment 200A comprises a cylindrical wrapper 220 and a tobacco sheet T filled in a folded manner within the wrapper. The ridges formed by the folding are substantially parallel to the longitudinal direction of the segment (see Fig. 4(C)). The tobacco segment 200A is preferably rod-shaped, and its length can be 15 - 80 mm and its diameter can be about 5 - 10 mm. In this embodiment, it is preferable that the tobacco sheet T is pre-treated with surface wrinkling such as pleating or crimping.

[0071] In another embodiment, the tobacco segment 200A comprises a cylindrical wrapper 220 and cut pieces of the tobacco sheet T filled within the wrapper (see Fig. 4(D)). The tobacco segment 200A is preferably rod-shaped, and its length can be 15 - 80 mm and its diameter can be about 5 - 10 mm. The size of the cut pieces is not limited, but for example, the length of the longest side can be about 2 - 20 mm and the width can be about 0.5 - 1.5 mm.

[0072] In another embodiment, the tobacco segment 200A comprises a cylindrical wrapper 220 and strand-type cuts filled within the wrapper (see Fig. 4(E)). The strand-type cuts are filled such that their longitudinal direction is substantially parallel to the longitudinal direction of the wrapper 220. The width of the strand-type cuts can be about 0.5 - 1.5 mm.

[0073] The tobacco segment 200A, in another aspect, comprises a cylindrical wrapper 220 and contains a tobacco cut filler randomly filled therein. The tobacco cut is a cut product and is different from the strand type cut.

[0074] [Manufacturing method] The tobacco sheet before corrugation in this aspect can be manufactured by any method, but is preferably manufactured by a method comprising the following steps. Step 1 of kneading at least a tobacco material, a binder, and a medium to prepare a mixture. Step 2 of rolling or extruding the mixture from a die to prepare a wet sheet. Step 3 of drying the wet sheet. The sheet thus formed under pressure is referred to as a "pressure-formed sheet", and as described later, the "pressure-formed sheet" includes a "laminated sheet" and an "extruded sheet". A laminated sheet is a sheet obtained by rolling a mixture one or more times with a roller to a target thickness and then drying it to a target moisture content. An extruded sheet is a sheet obtained by extruding a mixture from a T-die or the like to a target thickness and then drying it to a target moisture content. In the pressure-formed sheet, rolling and extrusion may be combined. For example, the mixture may be extruded and then further rolled to form a sheet.

[0075] (1) Step 1 In this step, a tobacco material, a binder, and a medium are kneaded. If necessary, an aerosol-forming substrate, an emulsifier, or a flavor can also be added. The blending amount of each component is adjusted so as to achieve the aforementioned amount. The medium preferably contains, for example, water or a water-soluble organic solvent having a boiling point of less than 100°C such as ethanol as a main component, and more preferably water or ethanol.

[0076] This step can be carried out by kneading each component, but is preferably carried out through 1) pulverization of raw materials (for example, single leaves), 2) preparation of wet powder, and 3) kneading. 1) Pulverization It is preferable to first coarsely crush the raw materials and then perform fine pulverization using a pulverizer (for example, ACM-5 manufactured by Hosokawa Micron). The D90 particle size after fine pulverization is preferably 20 to 1000 μm. The particle size is measured using a laser diffraction particle size analyzer such as a Mastersizer (manufactured by Malvern).

[0077] 2) Preparation of wet powder To the pulverized tobacco raw materials (for example, tobacco particles), a binder and, if necessary, additives such as flavors and lipids are added and mixed. This mixing is preferably a dry blend, so it is preferable to use a mixer as the mixing machine. Next, a medium such as water and, if necessary, an aerosol-forming substrate such as glycerin are added to the dry blend and mixed with a mixer to prepare wet powder (powder in a wet state). The amount of the medium in the wet powder can be 20 to 80% by mass, preferably 20 to 40% by mass, but it is appropriately Adjustment determined by Step 2. For example, when performing spreading in Step 2, the amount of the medium can be 20 to 50% by mass, and when performing extrusion, it can be 20 to 80% by mass. The solid content concentration of the wet powder is preferably 50 to 90% by mass.

[0078] 3) Kneading The wet powder is kneaded using a kneader (for example, DG-1 manufactured by Dalton). The kneading is preferably carried out until the medium is evenly distributed throughout, for example, it is preferable to knead until the color of the mixture becomes uniform visually.

[0079] (2) Step 2 In this process, the above-mentioned mixture (wet powder) is rolled or extruded from a die to prepare a wet sheet. For example, while sandwiching the mixture between two base films, using a calendar device (e.g., manufactured by Yuri Roll Machine Co., Ltd.), it is passed between a pair of rollers until it reaches a predetermined thickness (more than 100 μm) and rolled to obtain a laminate in which a wet sheet exists between the two base films. As the base film, a non-sticky film such as a fluoropolymer film is preferable. The rolling by rollers can be carried out multiple times. Also, the above-mentioned mixture (wet powder) can be extruded from a die provided with a predetermined gap (preferably a T-die) to form a wet sheet on a base material. As the base material, known ones such as a glass plate, a metal plate, and a plastic plate can be used. A known extruder can be used for extrusion.

[0080] (3) Step 3 In this process, the wet sheet is dried. For example, in the case of the laminate, this process can be carried out in the following procedure. 1) Peel off one of the base films. 2) Dry the laminate using a ventilation dryer. The drying temperature may be room temperature, but preferably it is 50 to 100 °C, and the drying time can be 1 to 2 minutes. 3) Then, peel off the remaining base film and further dry it under the above conditions to obtain a tobacco sheet. By drying in this way, it is possible to avoid the tobacco sheet adhering to other base materials. The tobacco sheet obtained in this way is also referred to as a "laminated sheet". The laminated sheet has a smooth surface and is preferable because it can suppress the occurrence of chipping when it comes into contact with other members. Also, this method is suitable for manufacturing sheets with a thickness of 300 μm or less.

[0081] Also, in the case of extrusion molding, the wet sheet on the base material is dried by air drying or heating. The drying conditions are as described above. The tobacco sheet obtained in this way is also referred to as an "extruded sheet". The extruded sheet has a smooth surface and is preferable because it can suppress the occurrence of chipping when it comes into contact with other members. This method is suitable for manufacturing sheets with a thickness of 200 μm or more.

[0082] [Second Aspect] The tobacco sheet in this aspect contains a tobacco material and a cellulose derivative having a degree of substitution of 0.65 or more as a binder.

[0083] (1) Binder In this aspect, a cellulose derivative having a degree of substitution of 0.65 or more, which is a binder, is used as a molding agent. A cellulose derivative is cellulose in which the -OH groups of glucopyranose residues are modified. Those in which the -OH group is modified to an -OR group (R is an organic group) are called cellulose ethers, and those in which the -OH group is modified to an -OX group (X is a group derived from an acid) are also called cellulose esters, and both can be used in the present invention.

[0084] The degree of substitution is the number of substituents per glucopyranose residue, that is, the number of modified OH groups. The degree of substitution used in the present invention is preferably 0.65 or more, more preferably 0.7 or more, still more preferably 0.8 or more. Also, the upper limit of the degree of substitution is preferably 3.0 or less, more preferably 2.0 or less, still more preferably 1.6 or less, and particularly preferably 1.0 or less.

[0085] The degree of substitution is measured by a known method. For example, the degree of substitution is measured by the nitric acid methanol method. The method is as follows: 1) Weigh accurately about 2.0 g of the sample and put it into a 300 ml stoppered Erlenmeyer flask. Add 100 ml of nitric acid methanol (a solution prepared by adding 100 ml of special grade concentrated nitric acid to 1 g of anhydrous methanol), and shake for about 2 hours to convert the terminal acid groups from the salt form to the hydrogen form (for example, from COONa to COOH). 2) Filter the sample through a glass filter 1G3, wash it with 200 ml of 80% methanol, and then dry it at 105 °C for 2 hours. 3) Weigh accurately about 1 - 1.5 g of the completely dried sample, put it into a 300 ml stoppered Erlenmeyer flask, moisten it with 150 ml of 80% methanol, add 50 ml of 0.1 N NaOH, and shake at room temperature for 2 hours. Use phenolphthalein as an indicator and back-titrate the excess NaOH with 0.1 N sulfuric acid. 4) Calculate the degree of substitution from the following formula. Degree of substitution = 0.162A / (1 - 0.058A) A = 50 × F' - (amount of sulfuric acid (ml) × F) / (mass of absolutely dry sample (g) × 0.1) F: Factor of the sulfuric acid F': Factor of the NaOH

[0086] In cellulose ethers, there can be up to three Rs, and each R may be the same or different. Examples of R include linear or branched C1 - C3 alkyl groups such as methyl group, ethyl group, and propyl group; linear or branched C1 - C3 hydroxyalkyl groups such as hydroxymethyl group, hydroxyethyl group, and hydroxypropyl group; arylalkyl groups with 7 - 20 carbon atoms such as benzyl group and trityl group; cyanoalkyl groups such as cyanoethyl group; carboxyalkyl groups such as carboxymethyl group and carboxyethyl group; aminoalkyl groups such as aminoethyl group. Among them, carboxyalkyl group is preferred as R, and carboxymethyl group is more preferred. The degree of substitution in cellulose ethers is also referred to as the degree of etherification.

[0087] In cellulose ethers, there can be up to three Xs, and each X may be the same or different. Examples of X include groups derived from C0 - C4 carboxylic acids such as formic acid, acetic acid, propionic acid, and butyric acid; groups derived from C6 - C10 aromatic carboxylic acids such as benzoic acid and phthalic acid; groups derived from sulfonic acids such as p - toluenesulfonic acid; groups derived from inorganic acids such as nitric acid, sulfuric acid, and phosphoric acid; groups derived from xanthogenic acid. The degree of substitution in cellulose esters is also referred to as the degree of esterification.

[0088] Since the cellulose derivative has high hydrophilicity, when it is used as a binder, its affinity with tobacco materials is improved. As a result, the strength of the tobacco sheet is improved and it is less likely to crumble during use.

[0089] Furthermore, the cellulose derivative is soluble in an organic solvent, particularly ethanol. Therefore, when a mixture using ethanol as a medium is used in the production of a tobacco sheet as described later, the viscosity of the mixture can be reduced, which is advantageous in the transportation and coating processes during production compared to a mixture using water as a medium. In addition, since ethanol is more volatile than water, it is possible to shorten the production time and reduce the energy cost during drying in the manufacturing method.

[0090] The amount of the cellulose derivative in the tobacco sheet is not particularly limited, but based on the dry mass of the tobacco sheet (the mass excluding the water mixed in, the same applies hereinafter), it is preferably 0.1 to 10% by mass, more preferably 1 to 5% by mass, and still more preferably 2 to 4% by mass in terms of dry mass. If the amount of the binder exceeds the upper limit or is less than the lower limit, the above effects may not be fully achieved.

[0091] Specific examples of the cellulose derivative are exemplified below. Cellulose ethers: methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxymethylethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, benzyl cellulose, trityl cellulose, cyanoethyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, aminoethyl cellulose Cellulose esters: cellulose acetate, cellulose formate, cellulose propionate, cellulose butyrate, cellulose benzoate, cellulose phthalate, tosyl cellulose Et al of organic acid esters; Cellulose nitrate, Inorganic acid esters such as cellulose sulfate, cellulose phosphate, and cellulose xanthate

[0092] (2) Tobacco material In this embodiment, the tobacco material described in the first embodiment can be used.

[0093] (3) Aerosol generator In this aspect, the tobacco sheet may contain the aerosol generating agent described in the first aspect.

[0094] (4) Emulsifier In this aspect, the tobacco sheet may contain the emulsifier described in the first aspect.

[0095] (5) Cellulose other than tobacco In this aspect, the tobacco sheet may contain cellulose other than tobacco. Examples of cellulose other than tobacco include the aforementioned cellulose fibers and cellulose powder, and do not include cellulose derivatives as binders.

[0096] (6) Flavor In this aspect, the tobacco sheet may contain the flavor described in the first aspect.

[0097] (7) Characteristics and form of the tobacco sheet 1) Thickness The thickness w3 of the tobacco sheet in this aspect is not limited, but in one aspect, it is preferably 20 to 2000 μm, more preferably 100 to 1500 μm, and even more preferably 100 to 1000 μm.

[0098] 2) Strength The tobacco sheet in this aspect preferably has a tensile stress of 1.7 N / mm or more, more preferably 2 N / mm or more, and even more preferably 3 N / mm or more.

[0099] 3) Arithmetic mean surface roughness Sa The arc-shaped curved surface of the tobacco sheet in this aspect preferably has an arithmetic mean surface roughness Sa of 0.03 mm or less. Sa is an index of surface roughness. When the tobacco sheet in this aspect has an Sa within the above range, the chipping from the surface is reduced. From this perspective, the upper limit value of Sa is more preferably 0.02 mm or less.

[0100] (8) Tobacco segment A tobacco segment for use in a smoking article can be manufactured from a tobacco sheet. The tobacco segment in this embodiment is as described in the first embodiment.

[0101] [Manufacturing Method] The tobacco sheet before being corrugated in this embodiment can be manufactured by any method, but is preferably manufactured by a method comprising the following steps. Step 1 of preparing a mixture containing at least a tobacco material, the cellulose derivative, and a medium, Step 2 of spreading the mixture on a substrate to prepare a wet sheet, and Step 3 of drying the wet sheet.

[0102] (1) Step 1 In this step, a tobacco material, a cellulose derivative as a binder, and a medium are mixed. Optionally, an aerosol-forming substrate, an emulsifier, or a flavoring agent can also be added. The blending amount of each component is adjusted so as to achieve the above-mentioned amounts. The medium preferably contains, for example, water or a water-soluble organic solvent having a boiling point of less than 100°C such as ethanol, and more preferably water or ethanol. The mixing method is not limited, and known equipment such as a mixer or a kneader can be used. The solid content concentration of the mixture obtained by mixing is not limited and is appropriately Adjustment adjusted to be suitable for Step 2. For example, the upper limit of the solid content concentration is preferably 98% by mass or less, 90% by mass or less, or 80% by mass or less, and the lower limit is preferably 10% by mass or more, 20% by mass or more, 30% by mass or more, 40% by mass or more, or 50% by mass or more.

[0103] (2) Step 2 In this step, the mixture is spread on a substrate to prepare a wet sheet. The substrate is not limited and examples include inorganic material substrates such as glass plates, metal substrates such as aluminum plates, organic material substrates such as PET films and fluoropolymer films, and fiber material substrates such as non-woven fabrics. The method of spreading the mixture on the substrate is not limited, and examples include a rolling method of rolling and spreading using a roller as described later, an extrusion method of extruding from a die, and a casting method of casting.

[0104] (3) Drying process In this process, the wet sheet is dried. Drying can be carried out according to a known method. For example, the wet sheet can be air-dried at room temperature or dried by heating. The heating temperature is not limited either, and it can be, for example, 60 to 150°C. The dried sheet is isolated from the base material to obtain a tobacco sheet.

[0105] Hereinafter, a preferred embodiment of the method for manufacturing a tobacco sheet in this aspect will be described. [Rolling method] 1) Step 1 1-1) Crushing The raw material (for example, a single leaf) is roughly crushed. Then, fine crushing is carried out using a crusher (for example, ACM-5 manufactured by Hosokawa Micron). The particle size (D90) after fine crushing is preferably 50 to 800 μm. The particle size is measured using a laser diffraction particle size analyzer such as a Mastersizer (manufactured by Malvern).

[0106] 1-2) Preparation of wet powder To the crushed tobacco raw material (for example, tobacco particles), a binder, a fibrous material, and additives such as flavors and lipids are added as necessary and mixed. Since this mixing is preferably dry blending, it is preferable to use a mixer as the mixer. Then, a medium such as water and an aerosol generating base material such as glycerin are added to the dry blend as necessary and mixed with a mixer to prepare wet powder (powder in a wet state). The amount of the medium in the wet powder can be 20 to 80% by mass, preferably 20 to 40% by mass, but it may be 20 to 50% by mass since rolling is performed in Step 2. The solid content concentration of the wet powder is preferably 50 to 90% by mass.

[0107] 1-3) Kneading The wet powder is kneaded using a single-screw or multi-screw kneader, for example, a kneader (DG-1 manufactured by Dalton). Kneading is preferably carried out until the medium is evenly distributed throughout, for example, it is preferable to knead until the color of the mixture becomes uniform visually.

[0108] 2) Step 2 (Calendaring) While sandwiching the mixture after kneading between two base films, using a calendar device (for example, manufactured by Yuri Roll Machinery Co., Ltd.), pass it between a pair of rollers until it reaches a predetermined thickness (more than 100 μm) and perform calendaring to obtain a laminate with a wet sheet present between the two base films. Calendaring by rollers can be performed multiple times. The base film is preferably a non-sticky film such as a fluoropolymer film, and specifically, a Teflon (registered trademark) film can be mentioned.

[0109] 3) Step 3 Peel off one of the base films in the laminate. Dry the laminate using a ventilation dryer. The drying temperature is preferably 50 to 100 °C, and the drying time can be 1 to 2 minutes. Then, peel off the remaining base film and further dry it under the above conditions to obtain a tobacco sheet. By performing drying in this way, it is possible to avoid the tobacco sheet adhering to other base materials.

[0110] The tobacco sheet obtained by this method is also referred to as a "laminate sheet". The laminate sheet has a smooth surface and is preferable because it can suppress the occurrence of scratching when it comes into contact with other members. Also, this method is suitable for manufacturing sheets of 300 μm or less.

[0111] [Extrusion method] 1) Step 1 Step 1 in this method is as described in the rolling method. Prepare wet powder (powder in a wet state). When extrusion is performed in Step 2, the amount of the medium in the wet powder can be selected in the range of 20 to 80% by mass, but preferably 20 to 40% by mass. 2) Step 2 In this step, extrude the wet powder from a die provided with a predetermined gap to form a wet sheet on the base material. A known extruder can be used for extrusion. 3) Step 3 In this process, a wet sheet is dried to obtain a tobacco sheet. The drying conditions are as described by the rolling method. The tobacco sheet obtained by this method is also referred to as an "extruded sheet". The extruded sheet has a smooth surface and is preferable because it can suppress the occurrence of chipping when it comes into contact with other members. This method is suitable for manufacturing sheets of 200 μm or more.

[0112] Also, the sheet formed by applying pressure in this way is referred to as a "pressure-formed sheet", and the "pressure-formed sheet" includes a "laminated sheet" and an "extruded sheet". A laminated sheet is a sheet obtained by rolling a mixture one or more times with a roller to a target thickness and then drying it to a target moisture content. An extruded sheet is a sheet obtained by extruding a mixture from a T-die or the like to a target thickness and then drying it to a target moisture content. In the pressure-formed sheet, rolling and extrusion may be combined. For example, after extruding the mixture, it may be further rolled to form a sheet.

[0113] [Casting method] 1) Step 1 Step 1 in this method can be carried out by any method. For example, a mixture can be prepared by mixing a tobacco raw material having a desired particle size, a cellulose derivative, a medium, and, if necessary, additives with a mixer or the like. Since the solid content concentration of the mixture obtained in this step is preferably about 3 to 15% by mass, the mixture is also referred to as a slurry.

[0114] 2) Step 2 In this step, the slurry is cast onto a substrate to form a wet sheet. Casting can be carried out as is known.

[0115] 3) Step 3 In this step, the wet sheet is dried to obtain a tobacco sheet. The drying conditions are as described by the rolling method. The tobacco sheet obtained by this method is also referred to as a "cast sheet".

Example

[0116] Hereinafter, specific examples of this embodiment will be described, but the present invention is not limited thereto.

[0117] [Example 1] The tobacco lamina (flue-cured tobacco) was dry-ground using a Hosokawa Micron ACM machine to obtain tobacco powder. For the tobacco powder, the cumulative 90% particle size (D90) in the volume-based particle size distribution measured by the dry laser diffraction method was measured using a Mastersizer (trade name, manufactured by the Malvern Panatical Business Unit of Spectris Co., Ltd.), and it was 200 μm.

[0118] Using the tobacco powder as a tobacco raw material, a tobacco sheet was manufactured. Specifically, 70 parts by mass of the tobacco raw material, 12 parts by mass of glycerin as an aerosol generator, 4 parts by mass of powdered carboxymethyl cellulose as a first molding agent, 1 part by mass of carboxymethyl cellulose swollen with water as a second molding agent, 5 parts by mass of fibrous pulp as a reinforcing agent, and 8 parts by mass of cocoa powder as a flavor were mixed and kneaded using an extrusion molding machine. The kneaded product was formed into a sheet shape using two pairs of metal rolls to obtain a rolled product. A rotary roll blade for noodle making was pressed against the rolled product to impart a corrugated shape while cutting it into strips. Further, it was cut to a length of 20 mm and dried to obtain a tobacco sheet having a length of 20 mm and a width of 0.8 mm. The cross-section in the thickness direction of the tobacco sheet had a cross-sectional shape as shown in FIG. 1.

[0119] The swelling property of the obtained tobacco sheet was measured. Specifically, after the tobacco sheet was left in a conditioning chamber at 22°C and 60% for 48 hours, the swelling property was measured using a DD-60A (trade name, manufactured by Borgward). The measurement was performed by placing 15 g of the tobacco sheet in a cylindrical container with an inner diameter of 60 mm and determining the volume when compressed with a 3 kg load for 30 seconds. The results are shown in Table 1. In Table 1, the swelling property is shown as the increase rate (%) of the swelling property with respect to the value of the swelling property in Comparative Example 1 described later.

[0120] [Comparative Example 1] A rolled product was produced in the same manner as in Example 1. Then, it was cut into strips with a plurality of ring-shaped rotary blades. Further, by cutting so that the length became 20 mm, a tobacco sheet having no corrugated shape with a length of 20 mm and a width of 0.8 mm was obtained. The swelling property of the obtained tobacco sheet was measured in the same manner as in Example 1. The results are shown in Table 1.

[0121]

Table 1

[0122] From Table 1, in the tobacco sheet of Example 1 which is the tobacco sheet according to the present embodiment, the swelling property was improved as compared with the tobacco sheet of Comparative Example 1 to which no corrugated shape was imparted.

[0123] Hereinafter, the first aspect will be described by giving Reference Example A and Reference Comparative Example A.

[0124] [Reference Example A1] Tobacco leaves were pulverized using a pulverizer (ACM-5 manufactured by Hosokawa Micron) so that D90 was 204 μm and D50 was 66 μm to obtain tobacco leaf particles. D90 and D50 were measured with a Mastersizer (manufactured by Malvern). The tobacco leaf particles and Sunrose F20HC (cellulose ether manufactured by Nippon Paper Industries Co., Ltd.) as a binder were dry-blended using a mixer. Next, glycerin as an aerosol generation base material and water as a medium were added to the dry blend, and mixed with a mixer to prepare a wet powder. The blending of each component is as shown in Table A1.

[0125] Using a kneader (DG-1 manufactured by Dalton), the wet powder was kneaded 6 times at room temperature to obtain a mixture. A T-die was used as the die, and the screw rotation speed was 38.5 rpm.

[0126] The wet powder was sandwiched between two Teflon (registered trademark) films (NITOFLON(R) No. 900UL manufactured by Nitto Denko Corporation), and using a calendar device (manufactured by Yuri Roll Machinery Co., Ltd.), it was rolled in four stages until it reached a predetermined thickness (more than 100 μm) to prepare a laminate with a thickness of 105 μm having a layer structure of film / wet sheet / film. The roll gaps in the first to fourth stages were 650 μm, 330 μm, 180 μm, and 5 μm, respectively. The roll gap in the fourth stage is thicker than the thickness of the finally obtained sheet, which is because the sheet released from the pressure between the rollers expanded to near the final thickness.

[0127] One Teflon (registered trademark) film was peeled off from the laminate, and it was dried at 80°C for 1 to 2 minutes using a ventilation dryer. Next, the other film was peeled off, and the wet sheet was dried under the same conditions to produce and evaluate the tobacco sheet of the present invention.

[0128]

Table A1-1

[0129] In the mass of the wet powder in Table A1-1, the tobacco leaf powder, glycerin, and binder indicate the dry matter mass, and the water indicates the total mass of the charged mass and the moisture mass contained in the tobacco leaf powder, glycerin, and binder.

[0130] [Reference Examples A2, A4] Tobacco sheets were produced and evaluated in the same manner as in Reference Example A1, except that Sunrose F30MC and Sunrose F20LC were used instead of Sunrose F20HC (cellulose ether manufactured by Nippon Paper Industries Co., Ltd.) as the binder.

[0131] [Reference Example A3] As a binder, instead of Sunrose F20HC (cellulose ether manufactured by Nippon Paper Industries Co., Ltd.), Sunrose F30MC was used, its blending amount was changed as shown in Table A3, and the amount of glycerin was changed to 15.5% by mass on a dry basis. A tobacco sheet was manufactured and evaluated in the same manner as in Reference Example A1, except for these changes.

[0132] [Reference Comparative Example A1] Leaf tobacco particles with a D90 of 204 μm and a D50 of 66 μm were obtained in the same manner as in Reference Example A1. The same components and pulp as in Reference Example A1 were mixed in a mixer to obtain a mixture. Using this mixture, a tobacco sheet was manufactured by the casting method according to a conventional method.

[0133] [Table A1-2]

[0134] [Reference Comparative Example A2] A tobacco sheet was manufactured by the hand-sheet making method according to a conventional method. Specifically, the water-soluble components of the tobacco raw material were extracted with water, the extraction residue, pulp, and water were mixed, and this was beaten using a grinder. A sheet was formed with a paper machine, the sheet was dried, and the extract and glycerin were added to the sheet. The tobacco sheet was evaluated in the same manner as in Reference Example A1. The composition of the sheet is shown in Table A2. Also, the evaluation results of the tobacco sheet manufactured in the above example are shown in Table A3.

[0135] [Table A2]

[0136] [Table A3]

[0137] The evaluation method will be described below. [Scratch-out volume] The tobacco sheets prepared in each example were cut to prepare flakes. The flakes were filled into a trumpet 22 with a length of 12 mm and a diameter of 7 mm at 70% by volume, and tobacco This cell ment 20A was prepared. Next, the flavor-absorbing article 1 shown in FIG. 2 including the tobacco-containing segment was prepared. A system shown in FIG. 3 (however, an internal heating type) was prepared and subjected to a smoking test (14 puffs, CIR conditions, constant heating at 350° C.) using a smoking machine. After the smoking test, the flakes were gently removed from the tobacco segment 20A. Next, the flakes were newly filled into the trumpet 22 again at the above volume percentage and subjected to a second smoking test. In this way, a total of 20 smoking tests were performed, and the volume of the total flake spill remaining in the trumpet 22 was measured.

[0138] [Surface roughness] Using a microscope (VK-X100 manufactured by KEYENCE), the measurement was performed according to the following procedure. 1) Set the focal position of the lowest part of the sheet 2) Set the focal position of the highest part of the sheet 3) Divide the section obtained in 1) and 2) and image while slightly shifting the focus 4) Measure the height from the difference between the focal position of each part and the focal position of the lowest part 5) Calculate the roughness from the height data of each position (automatically calculated by the measuring machine software) and calculate the arithmetic surface roughness Sa

[0139] [Tensile strength, elongation] The obtained sheet was cut into a width of 15 mm × a length of 180 mm, and using a tensile strength tester (manufactured by Toyo Seiki Seisakusho Co., Ltd.: Strograph E-S), it was measured under the conditions of ROADRANGE: 25 and SPEEDRANGE: 50, and the tensile strength was evaluated by tensile stress.

[0140] Hereinafter, with reference to Reference Example B and And reference Con Comparison Example B, the second aspect will be described.

[0141] [Reference Example B1] Tobacco leaves were pulverized using a pulverizer (ACM-5 manufactured by Hosokawa Micron Corporation) so that D90 was 50 to 800 μm to obtain tobacco leaf particles. D90 was measured using a Mastersizer (manufactured by Malvern). The tobacco leaf particles and carboxymethyl cellulose (Sunrose F F30MC manufactured by Nippon Paper Industries Co., Ltd.) as a binder were dry-blended using a mixer. Next, glycerin as an aerosol generation base material and water as a medium were added to the dry blend and mixed with a mixer to prepare a wet powder. The formulation of each component is as follows.

[0142]

Table B1

[0143] In the mass in the wet powder of Table B1, the tobacco leaf pulverized product, glycerin, and binder indicate the dry matter mass, and water indicates the total amount of the charged mass and the moisture mass contained in the tobacco leaf pulverized product, glycerin, and binder.

[0144] Using a kneader (DG-1 manufactured by Dalton), the wet powder was kneaded 6 times at room temperature to obtain a mixture. The die shape was a T shape (T-die), and the screw rotation speed was 38.5 rpm.

[0145] The wet powder was sandwiched between two Teflon (registered trademark) films (NITOFLON(R) No. 900UL manufactured by Nitto Denko Corporation) and rolled in 4 steps using a calendar device (manufactured by Yuri Roll Machinery Co., Ltd.) until it reached a predetermined thickness (more than 100 μm) to prepare a laminate with a thickness of 105 μm having a film / wet sheet / film layer structure. The roll gaps for the 1st to 4th stages were 650 μm, 330 μm, 180 μm, and 5 μm, respectively. The roll gap for the 4th stage is thicker than the thickness of the finally obtained sheet because the sheet released from the pressure between the rollers expanded to near the final thickness.

[0146] One Teflon (registered trademark) film was peeled off from the laminate and dried at 80°C for 1 to 2 minutes using a ventilation dryer. Then, another film was peeled off and the wet sheet was dried under the same conditions to produce the tobacco sheet according to this embodiment.

[0147] [Reference Examples B2 - B5] Tobacco sheets were produced and evaluated in the same manner as in Reference Example B1, except that carboxymethyl cellulose shown in Table B2 (all manufactured by Nippon Paper Industries Co., Ltd.) was used as the binder respectively.

[0148] [Reference Comparative Example B1] Tobacco sheets were produced and evaluated in the same manner as in Reference Example B1, except that carboxymethyl cellulose shown in Table B2 (manufactured by Nippon Paper Industries Co., Ltd.) was used as the binder respectively. The results are shown in Table B3. In the table, the physical properties of the finished sheet are those of the sheet manufactured through drying as described above and indicate the physical properties of the sheet that has not been dried to the absolute dry state.

[0149]

Table B2

[0150]

Table B3

[0151] The evaluation method is described below. [Volume of chipping] The tobacco sheets prepared in each example were cut to prepare flakes. The flakes were filled into a trumpet 22 with a length of 12 mm and a diameter of 7 mm at 70% by volume to prepare a tobacco-containing segment 20A. Next, a flavor-absorbing article 1 shown in FIG. 2 including the tobacco-containing segment was prepared. A system shown in FIG. 3 (however, an internally heated type) was prepared and subjected to a smoking test (14 puffs, CIR conditions, constant heating at 350° C.) using a smoking machine. After the smoking test, the flakes were gently removed from the tobacco segment 20A. Next, the flakes were newly filled into the trumpet 22 again at the above volume percentage and subjected to a second smoking test. In this way, a total of 20 smoking tests were conducted, and the volume of the total flake spill remaining in the trumpet 22 was measured.

[0152] [Surface roughness] Measurement was performed using a microscope (VK-X100 manufactured by KEYENCE) according to the following procedure. 1) Set the focal position of the lowest part of the sheet. 2) Set the focal position of the highest part of the sheet. 3) Divide the section obtained in 1) and 2) and image while slightly shifting the focus little by little. 4) Measure the height from the difference between the focal position of each part and the focal position of the lowest part. 5) Calculate the roughness from the height data of each position (automatically calculated by the measuring machine software) and calculate the arithmetic surface roughness Sa.

[0153] [Coagulability after heating] An unburned internally heated smoking system was prepared under the conditions described for the flake spill volume, and a smoking test was conducted once under the same conditions. After the test, the tobacco segment 20A was taken out from the system, a jig was applied to a position 6 mm in the longitudinal direction from the tip, and it was compressed in the radial direction at a constant speed. The load (N) when the jig reached a position of 3.5 mm was determined to evaluate the coagulability after heating. The higher the value of the load, the easier the flakes adhere after heating, and thus the less likely flake spill occurs.

[0154] [Tensile strength] The obtained sheet was cut into a width of 15 mm and a length of 180 mm, and measured using a tensile strength tester (manufactured by Toyo Seiki Seisakusho Co., Ltd.: Strograph E-S) under the conditions of ROADRANGE: 25 and SPEEDRANGE: 50. The tensile strength was evaluated by tensile stress.

[0155] [Degree of substitution] It was determined by the above-described measurement method.

[0156] Embodiments are shown below. [1] A tobacco sheet for a non-combustion heating type flavor inhaler containing a tobacco raw material, wherein a cross-section in the thickness direction of the tobacco sheet has a corrugated shape. [2] The tobacco sheet for a non-combustion heating type flavor inhaler according to [1], wherein the tobacco sheet further contains an aerosol generating agent. [3] The tobacco sheet for a non-combustion heating type flavor inhaler according to [2], wherein the aerosol generating agent is at least one selected from the group consisting of glycerin, propylene glycol, and 1,3-butanediol. [4] The tobacco sheet for a non-combustion heating type flavor inhaler according to [2] or [3], wherein the ratio of the aerosol generating agent contained in 100% by mass of the tobacco sheet is 4 to 50% by mass. [5] The tobacco sheet for a non-combustion heating type flavor inhaler according to any one of [1] to [4], wherein the tobacco sheet further contains a first molding agent and a second molding agent. [6] The tobacco sheet for a non-combustion heating type flavor inhaler according to [5], wherein the first molding agent is at least one selected from the group consisting of polysaccharides, proteins, and synthetic polymers. [7] The tobacco sheet for a non-combustion heating type flavor inhaler according to [5] or [6], wherein the second molding agent is at least one selected from the group consisting of polysaccharides, proteins, and synthetic polymers, which is different from the first molding agent. [8] The tobacco sheet for a non-combustion heating type flavor inhaler according to any one of [5] to [7], wherein the ratio of the first molding agent contained in 100% by mass of the tobacco sheet is 0.1 to 15% by mass. [9] The ratio of the second molding agent contained in 100% by mass of the tobacco sheet is 0.1 to 15% by mass, and the tobacco sheet for a non-combustion heating type flavor absorber according to any one of [5] to [8].

[10] A non-combustion heating type flavor absorber comprising a tobacco-containing segment including the tobacco sheet for a non-combustion heating type flavor absorber according to any one of [1] to [9].

[11] The non-combustion heating type flavor absorber according to

[10] , and A heating device for heating the tobacco-containing segment, and A non-combustion heating type flavor absorption system comprising the same.

[12] A method for manufacturing a tobacco sheet for a non-combustion heating type flavor absorber according to any one of [1] to [9], comprising: Preparing a mixture containing a tobacco raw material, an aerosol generator, a first molding agent, and a second molding agent; Rolling the mixture to form a rolled product; Pressing a rotary roll blade against the rolled product to cut it into strip shapes while imparting a corrugated shape; and A method comprising the same.

[0157] [1A] A tobacco sheet containing a tobacco material and a binder, and having an arithmetic mean surface roughness Sa of at least one surface of 5 to 30 μm. [2A] The sheet according to [1A], which is a pressure-formed sheet. [3A] The sheet according to [1A] or [2A], wherein the blending amount of the binder is 6% by 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], having an arithmetic mean surface roughness Sa of both surfaces of 5 to 30 μm. [5A] The sheet according to any one of [1A] to [4A], having a tensile elongation of 5 to 15%. [6A] A non-combustion heating type smoking article comprising the tobacco sheet according to any one of [1A] to [5A] or a material derived therefrom. [7A] At least step 1 of kneading a tobacco material, a binder, and a medium to prepare a mixture, Step 2 of preparing a wet sheet by rolling or extruding the mixture from a die, and Step 3 of drying the wet sheet, A method for manufacturing a sheet according to any one of [1A] to [5A], comprising the above steps. [8A] The manufacturing method according to [7A], wherein Step 2 includes preparing a laminated sheet in which a wet sheet exists between two base films. [9A] The manufacturing method according to [7A] or [8A], wherein Step 1 includes kneading at least a tobacco material, a binder, and a medium with a uniaxial or multi-axial kneader. [10A] The manufacturing method according to any one of [7A] to [9A], wherein the mixture contains 20 to 80% by mass of a medium based on the total amount of the mixture.

[0158] [1B] A tobacco material and [[ID=1�]]a cellulose derivative having a degree of substitution of 0.65 or more, a tobacco sheet. [2B] The sheet according to [1B], wherein the degree of substitution is 0.7 or more. [3B] The sheet according to [2B], wherein the degree of substitution 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 mean surface roughness Sa is 0.03 mm or less. [6B] The sheet according to any one of [1B] to [5B], which is a pressure-formed sheet. [7B] Step 1 of preparing a mixture containing at least a tobacco material, the cellulose derivative, and a medium, Step 2 of spreading the mixture on a substrate to prepare a wet sheet, and Step 3 of drying the wet sheet, A method for manufacturing a sheet according to any one of [1B] to [6B], comprising the above steps. [8B] The manufacturing method according to [7B], wherein the step 1 includes kneading the tobacco material, the cellulose derivative, and the medium with a single-screw or multi-screw kneader. [9B] The manufacturing method according to [7B] or [8B], wherein the step 2 includes rolling out the mixture using rollers or extruding it from a die. [10B] The manufacturing method according to [9B], wherein the step 2 includes preparing a laminated sheet in which a wet sheet exists between two base films. [11B] A non-combustion heating type smoking article comprising the tobacco sheet according to any one of [1B] to [6B] or a material derived therefrom.

Explanation of symbols

[0159] 1 Tobacco sheet 2 Wave 3 Sawtooth shape 4 Non-combustion heating type flavor attractor 5 Tobacco-containing segment 6 Cooling segment 7 Center hole segment 8 Filter segment 9 Mouthpiece segment 10 Cylindrical member 11 Perforation 12 Second filling layer 13 Second inner plug wrapper 14 Outer plug wrapper 15 Mouthpiece lining paper 16 Heating device 17 Body 18 Heater 19 Metal tube 20 Battery unit 21 Control unit 22 Recess 200A Tobacco-containing segment 210 Filling 220 Wrapper T Tobacco sheet Region between two vertices that determines the wave period of cross-section a

Claims

1. A tobacco sheet for a pressure-formed non-combustion heating type flavor inhaler containing a tobacco raw material, wherein a cross-section in the thickness direction of the tobacco sheet has a corrugated shape, at least one of the arc-shaped curved surfaces present on the front surface and the arc-shaped curved surface present on the back surface of the sheet has a surface arithmetic mean surface roughness Sa of 7.4 to 15.3 μm, A tobacco sheet for a non-combustion heating type flavor inhaler.

2. The sheet according to claim 1, comprising a cellulose derivative having a degree of substitution of 0.65 or more.

3. The sheet according to claim 2, wherein the degree of substitution is 0.7 or more.

4. A tobacco-containing segment comprising the tobacco sheet for a non-combustion heating type flavor inhaler according to claim 1, A non-combustion heating type flavor inhaler comprising the same.

5. The non-combustion heating type flavor inhaler according to claim 4, A heating device for heating the tobacco-containing segment, A non-combustion heating type flavor inhalation system comprising the same.

6. A method for manufacturing the tobacco sheet according to claim 1, comprising: preparing a mixture containing a tobacco raw material, an aerosol generating agent, a first molding agent, and a second molding agent; rolling the mixture to form a rolled product; applying a corrugated shape while cutting the rolled product into strips by pressing a rotary roll blade against it; A method comprising the above steps.

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