Tobacco sheet for non-combustion heating type fragrance attractor, non-combustion heating type fragrance attractor, and non-combustion heating type fragrance attracting system

Abstract

This tobacco sheet for a non-combustion heating-type flavor inhaler contains a tobacco powder having a cumulative 90% particle diameter (D90) of at least 200 μm in a volume-based particle size distribution as measured by a dry laser diffraction method.

Description

Technical Field

[0001] The present invention relates to a tobacco sheet for a non-combustion heating type flavor attractor, 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 is burned to obtain a flavor. As an alternative to the combustion type flavor attractor, a non-combustion heating type flavor attractor that obtains a flavor by heating instead of burning a flavor source such as a tobacco sheet 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 generator 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 generator is vaporized by heating to generate an aerosol. Since the aerosol is supplied to the user together 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 or the like is filled in the short tobacco-containing segment section. In order to fill a large amount of tobacco sheet or the like 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 granulation of a tobacco sheet of a predetermined mass is compressed at a constant pressure for a constant time. For example, Patent Documents 1 and 2 disclose tobacco sheets used in non-combustion heating type flavor attractors.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when the 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] In order to reduce the total heat capacity of the tobacco-containing segment, the 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). 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.

[0009] Aspect 1 A tobacco sheet for a non-combustion heating type flavor inhaler, comprising tobacco powder having a cumulative 90% particle diameter (D90) of 200 μm or more in a volume-based particle size distribution measured by a dry laser diffraction method. Aspect 2 The density is 1.0 g / cm 3 The sheet according to Aspect 1, which is as follows. Aspect 3 The sheet according to Aspect 1 or 2, which is a pressure-formed sheet. Aspect 4 A humectant, A binder, One or both of a flavoring agent or a molding aid, and further comprising The sheet according to any one of Aspects 1 to 3, having an air permeability of more than 0 Coresta units. Aspect 5 The sheet according to Aspect 4, wherein the air permeability is 500 Coresta units or more. Aspect 6 A tobacco-containing segment comprising the tobacco sheet for a non-combustion heating type flavor inhaler according to any one of Aspects 1 to 5, A non-combustion heating type flavor inhaler comprising the same. Aspect 7 The non-combustion heating type flavor inhaler according to Aspect 6, A heating device for heating the tobacco-containing segment, A non-combustion heating type flavor inhalation system comprising the same.

Advantages of the Invention

[0010] According to the present invention, it is possible to provide a tobacco sheet for a non-combustion heating type flavor inhaler having high swelling properties, a non-combustion heating type flavor inhaler comprising the tobacco sheet, and a non-combustion heating type flavor inhalation system.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0012] [Tobacco Sheet for Non-Combustion Heating Type Flavor Attractor] The tobacco sheet for a non-combustion heating type flavor attractor according to the present embodiment (hereinafter also referred to as "tobacco sheet") contains tobacco powder having a cumulative 90% particle diameter (D90) of 200 μm or more in a volume-based particle size distribution measured by a dry laser diffraction method.

[0013] In the tobacco sheet according to the present embodiment, since the D90 of the tobacco powder measured by the dry laser diffraction method is 200 μm or more, the voids between the tobacco powders in the tobacco sheet are large, and it is presumed that the voids contribute to the improvement of the swelling property of the tobacco sheet. Further, the tobacco sheet according to the present embodiment preferably further contains an aerosol generator and a molding agent, and by setting the blending ratio of these within a predetermined range, the swelling property of the tobacco sheet is further improved.

[0014] (Tobacco Powder) Examples of the tobacco powder contained in the tobacco sheet according to the present embodiment include leaf tobacco, midrib, and tobacco stalks. 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. As the size of the tobacco powder, 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, preferably 350 μm or more, and more preferably 500 μm or more. The upper limit of the range of the D90 is not particularly limited, but can be, for example, 2000 μm or less.

[0015] Also, in terms of further improving the swelling property of the tobacco sheet, the cumulative 50% particle diameter (D50) in the volume-based particle size distribution measured by the dry laser diffraction method is preferably 40 μm or more, more preferably 100 μm or more, and even more preferably 200 μm or more as the size of the tobacco powder. The upper limit of the range of the D50 is not particularly limited, but it can be, for example, 1000 μm or less. In this embodiment, the measurement of D90 and D50 by the dry laser diffraction method can be performed using, for example, a Mastersizer (trade name, manufactured by Malvern Panalytical, a business unit of Spectris Co., Ltd.).

[0016] The proportion of the tobacco powder contained in 100% by mass of the tobacco sheet is preferably 45 to 95% by mass. When the proportion of the tobacco powder is 45% by mass or more, sufficient tobacco aroma can be generated during heating. Also, when the proportion of the tobacco powder is 95% by mass or less, a sufficient amount of an aerosol generating agent and a molding agent can be included. The proportion of the tobacco powder is more preferably 50 to 93% by mass, even more preferably 55 to 90% by mass, and particularly preferably 60 to 88% by mass.

[0017] (Aerosol generating agent) From the viewpoint of increasing the amount of smoke during heating, the tobacco sheet according to this embodiment preferably further contains an aerosol generating agent. Examples of the aerosol generating agent include glycerin, propylene glycol, 1,3 - butanediol, and the like. These may be used alone or in combination of two or more.

[0018] When the tobacco sheet contains an aerosol generating agent, the proportion of the aerosol generating agent contained in 100% by mass of the tobacco sheet is preferably 4 to 50% by mass. When the proportion of the aerosol generating agent is 4% by mass or more, sufficient aerosol can be generated during heating from the viewpoint of quantity. Also, when the proportion of the aerosol generating agent is 50% by mass or less, sufficient aerosol can be generated during heating from the viewpoint of heat capacity. The proportion of the aerosol generating agent is more preferably 6 to 40% by mass, still more preferably 8 to 30% by mass, and particularly preferably 10 to 20% by mass.

[0019] (Binder) From the viewpoint of shape retention, the tobacco sheet according to the present embodiment preferably further contains a binder. Examples of the binder include polysaccharides, proteins, synthetic polymers, etc. These may be used alone or in combination of two or more. Examples of the polysaccharides include cellulose derivatives and naturally derived polysaccharides.

[0020] Examples of the 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.

[0021] Examples of naturally occurring 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, cassia 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.

[0022] Examples of proteins include cereal proteins such as wheat gluten and rye gluten. Examples of synthetic polymers include polyphosphoric acid, sodium polyacrylate, and polyvinylpyrrolidone.

[0023] When the tobacco sheet contains a molding agent, the proportion of the molding agent contained in 100% by mass of the tobacco sheet is preferably 0.1 to 15% by mass. When the proportion of the molding agent is 0.1% by mass or more, the mixture of raw materials can be molded into a sheet shape. Also, when the proportion of the molding agent is 15% by mass or less, other raw materials required for ensuring the functions required for the tobacco-containing segment of the non-combustion heating type flavor attractor can be sufficiently used. The proportion of the molding agent is more preferably 0.2 to 13% by mass, even more preferably 0.5 to 12% by mass, and particularly preferably 1 to 10% by mass.

[0024] (Reinforcing agent) From the perspective of further improving physical properties, the tobacco sheet according to this embodiment can further contain a reinforcing agent. Examples of the reinforcing agent include fibrous substances such as fibrous pulp, insoluble fibers, 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 60% by mass. Within this range, other raw materials required to ensure 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 55% by mass, and even more preferably 5 to 50% 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.

[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. Within this range, other raw materials required to ensure 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 powder, the aerosol generator, the molding agent, the reinforcing agent, and the humectant, the tobacco sheet according to this embodiment can contain, as necessary, flavoring agents such as fragrances and flavor enhancers, coloring agents, wetting agents, preservatives, and diluents such as inorganic substances.

[0029] (Swelling property) The swelling property of the tobacco sheet according to this embodiment is preferably 190 cc / 100 g or more. When the swelling property 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 swelling property 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 swelling property is not particularly limited, but for example, it can be 800 cc / 100 g or less. The swelling property is a value measured by DD-60A (trade name, manufactured by Borgward) after cutting the tobacco sheet into a size of 0.8 mm × 9.5 mm and storing it in a conditioning chamber at 22°C and 60% for 48 hours. The measurement is performed by putting 15 g of the cut tobacco sheet into a cylindrical container with an inner diameter of 60 mm and obtaining the volume when compressed with a 3 kg load for 30 seconds.

[0030] (Composition of tobacco sheet) In this embodiment, the "tobacco sheet" is a sheet formed by shaping the components constituting the tobacco sheet, such as tobacco powder, into a sheet shape. Here, the "sheet" refers to a shape having a pair of substantially parallel main surfaces and side surfaces. The length and width of the tobacco sheet are not particularly limited and can be appropriately adjusted according to the filling mode. The thickness of the tobacco sheet is not particularly limited, but from the balance between heat transfer efficiency and strength, 100 to 1000 μm is preferable, and 150 to 600 μm is more preferable.

[0031] (Manufacturing method of tobacco sheet) The tobacco sheet according to this embodiment can be manufactured by known methods such as a rolling method and a casting method. Details of various tobacco sheets manufactured by such methods are disclosed in "Dictionary of Tobacco, Tobacco Comprehensive Research Center, 2009.3.31".

[0032] <Rolling method> As a method for manufacturing a tobacco sheet by the rolling method, for example, a method including the following steps can be mentioned. (1) A step of mixing water, tobacco powder, an aerosol generator, a molding agent, and a reinforcing agent to obtain a mixture. (2) A step of feeding the mixture into a rolling roller and rolling it. (3) A step of drying the rolled product with a dryer. When manufacturing a tobacco sheet by this method, depending on the purpose, the surface of the rolling roller may be heated or cooled, the rotation speed of the rolling roller may be adjusted, and the interval between the rolling rollers may also be adjusted. One or more rolling rollers can be used to obtain a tobacco sheet with a desired basis weight.

[0033] <Casting method> As a method for manufacturing a tobacco sheet by the casting method, for example, a method including the following steps can be mentioned. (1) A step of mixing water, tobacco powder, an aerosol generator, a molding agent, and pulp to obtain a mixture. (2) A step of thinly spreading (casting) and drying the mixture to obtain a tobacco sheet. When manufacturing a tobacco sheet by this method, a step of removing some components such as nitrosamine by irradiating ultraviolet rays or X-rays on the slurry obtained by mixing water, tobacco powder, an aerosol generator, a molding agent, and pulp may be added.

[0034] [Non-combustion heating type flavor attractor] The non-combustion heating type flavor attractor according to the present embodiment includes a tobacco-containing segment including the tobacco sheet according to the present embodiment. Since the non-combustion heating type flavor attractor according to the present embodiment includes a tobacco-containing segment filled with a highly bulgy tobacco sheet 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.

[0035] An example of the non-combustion heating type flavor attractor according to this embodiment is shown in Fig. 1. The non-combustion heating type flavor attractor 1 shown in Fig. 1 includes a tobacco-containing segment 2 filled with a tobacco sheet or the like according to this embodiment, a cylindrical cooling segment 3 having perforations 8 on the circumference, a center hole segment 4, and a filter segment 5. The non-combustion heating type flavor attractor according to this embodiment may have other segments in addition to the tobacco-containing segment, the cooling segment, the center hole segment, and the filter segment.

[0036] The axial length of the non-combustion heating type flavor attractor according to this 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. Also, 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 aspect can be cited where 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. Also, the air permeability resistance of the filter segment at that time is 15 mmHg 2 O / seg or more and 60 mmHg 2 O / seg or less. These individual segment lengths can be appropriately changed according to manufacturing suitability, required quality, etc. 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.

[0037] (Tobacco-containing segment) The tobacco-containing segment 2 is filled with a tobacco sheet or the like according to the present embodiment inside a wrapping paper (hereinafter also referred to as a wrapper). The method of filling the tobacco sheet or the like inside the wrapping paper (hereinafter also referred to as a wrapper) is not particularly limited. For example, the tobacco sheet or the like may be wrapped with the wrapper, or the tobacco sheet or the like may be filled inside a cylindrical wrapper. When the shape of the tobacco sheet has a longitudinal direction like a rectangular shape, the tobacco sheet or the like may be filled so that the longitudinal direction becomes an unspecified direction inside the wrapper, or may be aligned and filled so as to be in the axial direction of the tobacco-containing segment 2 or a direction perpendicular to the axial direction.

[0038] (Cooling segment) As shown in FIG. 1, an example of the cooling segment 3 being composed of a cylindrical member 7 can be cited. The cylindrical member 7 may be, for example, a paper tube obtained by processing cardboard into a cylindrical shape.

[0039] The cylindrical member 7 and the mouthpiece lining paper 12 described later are provided with a perforation 8 penetrating both of them. Due to the presence of the perforation 8, outside air is introduced into the cooling segment 3 during suction. As a result, the aerosol vaporized component generated by heating the tobacco-containing segment 2 comes into contact with the outside air, its temperature drops, so it liquefies, and an aerosol is formed. The diameter (passing length) of the perforation 8 is not particularly limited, and for example, it may be 0.5 mm or more and 1.5 mm or less. The number of perforations 8 is not particularly limited, and it may be one or two or more. For example, a plurality of perforations 8 may be provided on the circumference of the cooling segment 3.

[0040] The amount of outside air introduced from the perforation 8 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 ratio of the outside air amount being 85% by volume or less, it is possible to sufficiently suppress the reduction of the flavor due to dilution by the outside air. Incidentally, this is also referred to as the ventilation ratio in another way of speaking. 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.

[0041] Alternatively, 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 wrinkled, pleated, or folded sheet material with a wrapper paper.

[0042] 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.

[0043] (Center hole segment) The center hole segment is composed of a filling layer having one or more hollow portions and an inner plug wrapper (inner wrapper paper) covering the filling layer. For example, as shown in FIG. 1, the center hole segment 4 is composed of a second filling layer 9 having a hollow portion and a second inner plug wrapper 10 covering the second filling layer 9. The center hole segment 4 has a function of enhancing the strength of the mouthpiece segment 6. The second filling layer 9 can be, for example, a rod having an inner diameter of φ1.0 mm or more and φ5.0 mm or less, in which cellulose acetate fibers are densely filled 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 9 has a high fiber filling density, when sucking, air and aerosol will flow only through the hollow portion, and hardly flow inside the second filling layer 9. Since the second filling layer 9 inside the center hole segment 4 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 4 may not have the second inner plug wrapper 10 and its shape may be maintained by thermoforming.

[0044] (Filter segment) The configuration of the filter segment 5 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 roll paper. The air permeability resistance per segment of the filter segment 5 can be appropriately changed according to the amount, material, etc. of the filler filled in the filter segment 5. For example, when the filler is cellulose acetate fiber, increasing the amount of cellulose acetate fiber filled in the filter segment 5 can increase the air permeability resistance. When the filler is cellulose acetate fiber, the filling density of the cellulose acetate fiber can be 0.13 to 0.18 g / cm 3 It can be. The air permeability resistance is the value measured by an air permeability resistance measuring instrument (trade name: SODIMAX, manufactured by SODI).

[0045] The length around the filter segment 5 is not particularly limited, but it 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 5 can be selected from 4 to 10 mm, and is selected so that its air permeability resistance becomes 15 to 60 mmH 2 O / seg. The axial length of the filter segment 5 is preferably 5 to 9 mm, and more preferably 6 to 8 mm. The cross-sectional shape of the filter segment 5 is not particularly limited, and can be, for example, circular, elliptical, polygonal, etc. Also, the filter segment 5 may contain a destructive capsule containing a fragrance, fragrance beads, or the fragrance may be directly added.

[0046] As shown in Fig. 1, the center hole segment 4 and the filter segment 5 can be connected by an outer plug wrapper (outer wrapping paper) 11. The outer plug wrapper 11 can be, for example, a cylindrical paper. Further, the tobacco-containing segment 2, the cooling segment 3, and the connected center hole segment 4 and filter segment 5 can be connected by a mouthpiece lining paper 12. These connections can be made, for example, by applying an adhesive such as a vinyl acetate-based adhesive to the inner surface of the mouthpiece lining paper 12 and inserting and winding the three segments. Note that these segments may be connected in multiple times using multiple lining papers.

[0047] [Non-combustion heating type flavor suction system] The non-combustion heating type flavor suction system according to the present embodiment includes a 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.

[0048] An example of the non-combustion heating type flavor suction system according to the present embodiment is shown in Fig. 2. The non-combustion heating type flavor suction system shown in Fig. 2 includes a non-combustion heating type flavor suction device 1 according to the present embodiment and a heating device 13 for heating the tobacco-containing segment of the non-combustion heating type flavor suction device 1 from the outside.

[0049] Figure 2(a) shows the state before the non-combustion heating type flavor attractor 1 is inserted into the heating device 13, and Figure 2(b) shows the state where the non-combustion heating type flavor attractor 1 is inserted into the heating device 13 and heated. The heating device 13 shown in Figure 2 includes a body 14, a heater 15, a metal tube 16, a battery unit 17, and a control unit 18. The body 14 has a cylindrical recess 19, and the heater 15 and the metal tube 16 are arranged at a position corresponding to the tobacco-containing segment of the non-combustion heating type flavor attractor 1 inserted into the recess 19 on the inner side surface of the recess 19. The heater 15 can be a heater by electric resistance, and power is supplied from the battery unit 17 according to an instruction from the control unit 18 that performs temperature control, and the heater 15 is heated. The heat generated from the heater 15 is transmitted to the tobacco-containing segment of the non-combustion heating type flavor attractor 1 through the metal tube 16 having a high thermal conductivity.

[0050] In Figure 2(b), since it is schematically illustrated, there is a gap between the outer periphery of the non-combustion heating type flavor attractor 1 and the inner periphery of the metal tube 16. However, actually, for the purpose of efficiently transferring heat, it is desirable that there is no gap between the outer periphery of the non-combustion heating type flavor attractor 1 and the inner periphery of the metal tube 16. Note that the heating device 13 heats the tobacco-containing segment of the non-combustion heating type flavor attractor 1 from the outside, but it may also be one that heats from the inside.

[0051] 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.

[0052] The inventors have found that a high response at the initial stage of suction, that is, sufficient delivery of flavor components at the initial stage of suction, enhances the satisfaction of use. Furthermore, the air permeability of conventional tobacco sheets is either zero or very low. In order to control the release of components from these sheets, for example, the sheets are wound and the filling amount of the composition is changed, or the density of the composition is changed, etc. However, these conventional methods have the drawback that there are limit values for the filling amount and density in order to maintain the wound shape, and the applicable range in product design is narrow. Therefore, the present invention includes a tobacco sheet having high swelling properties and higher satisfaction of use (first aspect), and a tobacco sheet having high swelling properties and capable of achieving an excellent profile (second aspect). Hereinafter, these aspects will be described.

[0053] [First Aspect] As a first aspect, a tobacco sheet having high swelling properties and higher satisfaction of use will be described. The tobacco sheet in this aspect has a density of 1.0 g / cm 3 as follows.

[0054] (1) Binder The binder is a kind of the above-mentioned molding agent and is an adhesive for binding tobacco powders to each other or binding tobacco powders and other components. In this aspect, a known binder 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 (mass excluding the water mixed in, the same hereinafter). If the amount of the binder exceeds the upper limit value or is less than the lower limit value, 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-derived polysaccharides [Derived from plants] Guar gum, tara gum, locust 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, macrohomoopsis 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 polymer Polyphosphoric acid, sodium polyacrylate, polyvinylpyrrolidone

[0060] (2) 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 having 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 based on the dry mass (mass excluding the water mixed therein, the same applies 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, it may be difficult to manufacture the tobacco sheet, and if it is less than the lower limit value, the amount of smoke may decrease.

[0061] (4) Emulsifier In this embodiment, the tobacco sheet may contain an emulsifier. The emulsifier enhances the affinity between the lipophilic aerosol generating agent and the hydrophilic tobacco material. Therefore, the addition of an emulsifier is particularly effective when using a lipophilic aerosol generating agent. 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 based on 100 parts by mass of the tobacco sheet, in terms of dry mass, preferably 0.1 to 3 parts by mass, more preferably 1 to 2 parts by mass.

[0062] (5) Fiber The tobacco sheet of this aspect can contain no fibers derived from tobacco and no fibers derived from materials other than tobacco (e.g., cellulose). In this case, it is possible to avoid the undesirable effects such as off-flavors on the taste by these fibers. However, since it is not realistic to completely eliminate the fibers, the amount of the fibers in the tobacco sheet is preferably 1.0% by mass, more preferably 0.5% by mass in terms of dry mass. Further, the tobacco sheet of this aspect can contain a total of 0.5 to 2.0% by mass of fibers derived from tobacco or fibers derived from materials other than tobacco. In this case, the strength of the tobacco sheet is improved by the fibers, and the balance between taste and strength is excellent. In the present invention, the fibers derived from tobacco refer to those obtained by pulping tobacco raw materials by beating using a grinder or the like, which are different from the above-described tobacco materials.

[0063] (6) Flavor In this aspect, the tobacco sheet may contain a flavor. A flavor is a substance that provides a scent and a flavor. The flavor may be a natural flavor or a synthetic flavor. One type of flavor may be used as the flavor, or a mixture of a plurality of 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 flavor. 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 viewpoint of imparting a good fragrance feeling, 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, Lobelia Root Oil, Maltol, Maple Syrup, Menthol, Menthone, L-Menthyl Acetate, para-Methoxybenzaldehyde, Methyl-2-pyrrolyl Ketone, Methyl Anthranilate, Methyl Phenylacetate, Methyl Salicylate, 4’-Methylacetophenone, Methylcyclopentenolone, 3-Methylvaleric Acid, Mimosa Absolute, 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 - carboxamide)acetate (WS - 5), sugars (such as sucrose, fructose, etc.), cocoa powder, carob powder, coriander powder, licorice powder, orange peel powder, rose hip 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) Density The tobacco sheet of this aspect has a density of 1.0 g / cm 3 as follows. A tobacco sheet having such a low density can achieve sufficient delivery of flavor components at the initial stage of smoking. Although the reason is not limited, it is presumed that since the low - density tobacco sheet can reduce the packing density of the tobacco filler in the smoking article, the amount of heat received per unit mass can be increased. Also, cost reduction can be achieved by reducing the packing density. From these viewpoints, the density is preferably 0.95 g / cm 3 or less, more preferably 0.75 g / cm 3The following applies. The lower limit of the density is not limited, but from the viewpoint of strength and the like, it is preferably 0.5 g / cm 3 or more. In the present invention, the density is calculated from the basis weight (mass per unit area) and the thickness. The air permeability of the tobacco sheet of this aspect is preferably 0 Coresta units.

[0066] 2) Thickness The thickness of the tobacco sheet is not limited, but the upper limit is preferably 1500 μm or less, more preferably 1000 μm or less, and even more preferably 500 μm or less. The lower limit is preferably 20 μm or more, more preferably 100 μm or more, and even more preferably 150 μm or more.

[0067] (8) Tobacco segment A tobacco segment for use in a smoking article can be manufactured from the tobacco sheet. The tobacco segment, in one aspect, comprises a cylindrical wrapper, and comprises a tobacco sheet filled in a spiral shape within the wrapper (see Fig. 3(A)). In the figure, 20A is the tobacco segment, T is the tobacco sheet, and 22 is the wrapper, which is usually paper. The tobacco segment is preferably rod-shaped, and its length can be 15 to 80 mm and its diameter can be about 5 to 10 mm. Further, the tobacco segment 20A shown in Fig. 3(A) can be cut so that the aspect ratio (length / diameter) is about 0.5 to 1.2 (see Fig. 3(B)).

[0068] The tobacco segment 20A, in another aspect, comprises a cylindrical wrapper 22, and comprises a tobacco sheet T filled in a folded manner within the wrapper. The ridges formed by folding are substantially parallel to the longitudinal direction of the segment (see Fig. 3(C)). The tobacco segment 20A is preferably rod-shaped, and its length can be 15 to 80 mm and its diameter can be about 5 to 10 mm. In this aspect, it is preferable that the tobacco sheet T has been previously subjected to surface wrinkling processing such as pleating or crimping.

[0069] In another aspect, the tobacco segment 20A includes a cylindrical wrapper 22 and includes cut pieces of a tobacco sheet T filled therein (see Fig. 3(D)). The tobacco segment 20A is preferably rod-shaped, and its length can be 15 to 80 mm and its diameter can be about 5 to 10 mm. The size of the cut pieces is not limited, but for example, the length of the longest side can be about 2 to 20 mm and the width can be about 0.5 to 1.5 mm.

[0070] In another aspect, the tobacco segment 20A includes a cylindrical wrapper 22 and includes strand-type cuts filled therein (see Fig. 3(E)). The strand-type cuts are filled so that their longitudinal direction is substantially parallel to the longitudinal direction of the wrapper 22. The width of the strand-type cuts can be about 0.5 to 1.5 mm.

[0071] In another aspect, the tobacco segment 20A includes a cylindrical wrapper 22 and includes a tobacco cut filler randomly filled therein. The tobacco cuts are cut objects and are different from the strand-type cuts.

[0072] [Manufacturing Method] The tobacco sheet in this aspect can be manufactured by any method, but is preferably manufactured by a method including the following steps. Step 1 of kneading at least tobacco powder, 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 formed by applying pressure in this way is called a "pressure-formed sheet", and as will be 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. Rolling and extrusion may be combined in the pressure-formed sheet. For example, the mixture may be extruded and then further rolled to form a sheet.

[0073] (1) Process 1 In this process, tobacco powder, a binder, and a medium are kneaded. If necessary, an aerosol generator, an emulsifier, or a fragrance can also be added. The blending amount of each component is adjusted so as to achieve the aforementioned amount. The medium preferably contains, as a main component, for example, water or a water-soluble organic solvent having a boiling point of less than 100°C such as ethanol, and more preferably is water or ethanol.

[0074] This process can be carried out by kneading each component, but preferably, it is 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 roughly pulverize the raw materials and then perform fine pulverization using a pulverizer (for example, ACM-5 manufactured by Hosokawa Micron). The D90 of the 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).

[0075] 2) Preparation of wet powder To the pulverized tobacco powder, a binder and, if necessary, additives such as a fragrance or a lipid are added and mixed. Since this mixing is preferably a dry blend, it is preferable to use a mixer as the mixer. Next, a medium such as water and, if necessary, an aerosol generator 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 is appropriately Adjustment adjusted according to Step 2. For example, when calendering is performed in Step 2, the amount of the medium can be 20 to 50% by mass, and when extrusion is performed, it can be 20 to 80% by mass. The solid content concentration of the wet powder is preferably 50 to 90% by mass. In a particularly preferred embodiment, wet powder containing tobacco particles with D90 of 200 μm or more and a liquid medium containing water (more preferably a liquid medium composed of water) and having a water content of 50% by mass or more is used.

[0076] 3) Kneading The wet powder is kneaded using a kneader (for example, DG-1 manufactured by Dalton). It is preferable to perform the kneading until the medium is evenly distributed throughout. For example, it is preferable to knead until the color of the mixture becomes uniform visually.

[0077] (2) Step 2 In this step, the 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, it is passed through a pair of rollers using a calendar device (for example, manufactured by Yuri Roll Machinery Co., Ltd.) until it reaches a predetermined thickness (more than 100 μm), and rolled to obtain a laminate with a wet sheet existing between the two base films. As the base film, a non-sticky film such as a fluoropolymer film is preferable. The rolling by the rollers can be performed multiple times. Also, the 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 materials such as a glass plate, a metal plate, and a plastic plate can be used. A known extruder can be used for the extrusion.

[0078] (3) Step 3 In this step, the wet sheet is dried. For example, in the case of a laminate, this step 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 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 "laminate sheet". The laminate 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.

[0079] In the case of extrusion molding, the wet sheet on the base material is air-dried or dried by heating. The drying conditions are as described above. The tobacco sheet thus obtained 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.

[0080] [Second Aspect] As a second aspect, a tobacco sheet having high swelling properties and capable of achieving an excellent profile will be described. The tobacco sheet in this aspect contains the tobacco powder, a humectant, a binder, and either one or both of a flavoring agent or a molding aid, and has an air permeability of more than 0 Coresta units.

[0081] (1) Humectant The humectant in this aspect is a material for giving moisture to the tobacco sheet, but it is also the above-described aerosol generator that vaporizes by heating, cools, and generates an aerosol or generates an aerosol by atomization. Examples of the humectant in this aspect include polyhydric alcohols such as glycerin or propylene glycol (PG); and triesters such as triethyl citrate (TEC) or triacetin. The humectant in this aspect preferably has a boiling point exceeding 100°C. The amount of the humectant in the tobacco sheet is preferably 1 to 40% by mass, more preferably 10 to 20% by mass, in terms of dry mass (mass excluding the water mixed therein; the same applies hereinafter). If the amount of the humectant exceeds the upper limit value, the production of the tobacco sheet may be difficult, and if it is less than the lower limit value, the amount of smoke may decrease.

[0082] (2) Binder In this aspect, the binder described in the first aspect can be used.

[0083] (3) Flavoring Agent The flavoring agent is a material for giving flavor, and is preferably a fragrance. The fragrances described above can be used.

[0084] (4) Aerosol generating agent In this embodiment, the tobacco sheet may be an aerosol generating agent described in the first embodiment and may include those that do not correspond to the moisturizing agent.

[0085] (5) Molding aid Examples of the molding aid in this embodiment include pulp or non-woven fabric made of vegetable fiber or synthetic fiber, and more specifically, fibers derived from tobacco or materials other than tobacco. The addition amount of the molding aid is preferably 0.5 to 2.0% by mass in the sheet. The tobacco sheet in this embodiment may contain either a flavoring agent or a molding aid. When containing a molding aid, specifically, effects such as ensuring the strength of the sheet and reducing the adhesiveness of the sheet can be achieved. When containing a fragrance, effects such as improving the loading capacity of the fragrance on the sheet can be achieved because the fragrance or the like can be supported on the molding aid.

[0086] 1) Air permeability The air permeability of the tobacco sheet of this embodiment is more than 0 Coresta units, preferably 50 Coresta units or more, 100 Coresta units or more, 200 Coresta units or more, 300 Coresta units or more, or 400 Coresta units or more, and more preferably 500 Coresta units or more. The upper limit is not limited, but is preferably 20,000 Coresta units or less, and more preferably 15,000 Coresta units or less. The Coresta unit is the air passage flow rate (cm 2 ) per minute per 1 cm 3 under the condition of a differential pressure of 1 kPa. The air permeability can be measured using a Coresta meter PPM1000M manufactured by Cerulean. In the present invention, the air permeability is preferably measured according to the following procedure. 1) The sheet is left standing for 48 hours under the conditions of a room temperature of 22 ° C and a relative humidity of 60% for condition adjustment. 2) Then, this sheet is cut into a size of 40 mm × 240 mm, and using an air permeability measuring device (PPM1000M manufactured by Cerulean), with a differential pressure of 1 kPa and a circular measuring head of 2 cm 2 , the air passage amount from the front surface to the back surface is measured. 3) The measurement environment is a room temperature (for example, 22 ° C) and a relative humidity of 60%.

[0087] In this embodiment, since a tobacco sheet having a specific air permeability is used, an initial profile can be achieved. Specifically, a higher delivery can be achieved in the initial puff than in the conventional sheet, and a profile can be achieved in which the delivery amount hardly decreases in the latter half of the puff, similar to the conventional sheet. Although the reason is not limited, it is presumed that this is because the high air permeability of the sheet increases the release efficiency of the humectant from the sheet, thereby increasing the amount of aerosol formed from the humectant.

[0088] 2) Thickness The thickness of the tobacco sheet of this embodiment is not limited, but in one embodiment, it is preferably 20 to 2000 μm, more preferably 100 to 1500 μm, and still more preferably 100 to 1000 μm.

[0089] 3) Density The tobacco sheet of this embodiment preferably has a density of 0.5 to 2.0 g / cm 3 and more preferably has a density of 0.5 to 1.0 g / cm 3 As will be described later, the tobacco sheet of this embodiment preferably has holes provided physically or chemically. Here, the density refers to the density of the entire sheet including the holes, not the density of the portion excluding the holes. Further, when the tobacco sheet of this embodiment has a density of 1.0 g / cm 3 or less, a more sufficient delivery of flavor components can be achieved at the initial stage of suction.

[0090] 4) Holes As described above, the tobacco sheet of this embodiment preferably has holes provided by processing. The holes can be provided by physical processing or chemical processing. Examples of the former include laser processing, cutting using a needle or the like, and electrical hole opening by locally discharging electricity. Examples of the latter include etching. The shape of the holes is not limited and may be a circle, an ellipse, a polygon, etc., and the holes are preferably through holes. The size, number, and arrangement of the holes are appropriately adjusted so as to achieve the desired air permeability. AdjustmentIt is achieved. In one aspect, the size of the holes is such that the diameter of the circumscribed circle thereof is 0.1 to 0.8 mm. Also, in one aspect, the arrangement of the holes is in a lattice pattern on the sheet, and the shortest distance between adjacent holes is about 0.2 to 0.8 mm.

[0091] (6) Tobacco segment A tobacco segment for use in a smoking article can be manufactured from the tobacco sheet. The tobacco segment in this aspect is as described in the first aspect.

[0092] [Manufacturing method] The tobacco sheet 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 tobacco powder, a humectant, a binder, and either one or both of a flavoring agent or a molding aid with 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.

[0093] (1) Step 1 In this step, at least tobacco powder, a humectant, a binder, and either one or both of a flavoring agent or a molding aid are kneaded with a medium. An emulsifier can also be added if necessary. The blending amount of each component is adjusted so as to achieve the aforementioned 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 as the main component, and more preferably water or ethanol.

[0094] This process can be carried out by kneading each component, but preferably, it is carried out through 1) pulverization of raw materials (e.g., single leaves), 2) preparation of wet powder, and 3) kneading. 1) Pulverization It is preferable to roughly pulverize the raw materials and then perform fine pulverization using a pulverizer (e.g., ACM-5 manufactured by Hosokawa Micron). The particle size D90 of the tobacco powder after fine pulverization is as described above. The particle size is measured using a laser diffraction particle size analyzer such as a Mastersizer (manufactured by Malvern).

[0095] 2) Preparation of wet powder Add and mix tobacco powder, a binder, one or both of a flavoring agent or a molding aid, and optionally an additive such as a lipid. Since this mixing is preferably a dry blend, it is preferable to use a mixer as the mixer. Next, a medium such as water and a moisturizing agent 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 is appropriately prepared in step 2. For example, when performing rolling 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.

[0096] 3) Kneading Knead the wet powder using a kneader (e.g., DG-1 manufactured by Dalton). It is preferable to carry out the kneading until the medium is evenly distributed throughout, for example, it is preferable to knead until the color of the mixture becomes uniform visually.

[0097] (2) Step 2 In this process, the 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, it is passed through a pair of rollers using a calendar device (e.g., manufactured by Yururi Roll Machinery Co., Ltd.) until it reaches a predetermined thickness (more than 100 μm) and rolled to obtain a laminate with a wet sheet existing between the two base films. As the base film, a non-sticky film such as a fluoropolymer film is preferred. The rolling by rollers can be carried out multiple times. Also, the mixture (wet powder) can be extruded from a die (preferably a T-die) provided with a predetermined gap 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.

[0098] (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 is preferably 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 sheet obtained in this way 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 chipping when it comes into contact with other members. Also, this method is suitable for manufacturing sheets of 300 μm or less.

[0099] 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 of 200 μm or more.

[0100] In addition, the tobacco sheet can also be manufactured by a papermaking method, a casting method, a non-woven fabric coating method, etc. The papermaking method is a method of manufacturing a sheet by papermaking and drying a mixture containing tobacco powder, a humectant, a binder, either one or both of a flavoring agent or a molding aid, and water. However, since the mixture needs to contain a fibrous substance, it is preferable to contain a fiberized tobacco raw material or pulp as a molding aid. The water extract extracted before the tobacco raw material is fiberized can be concentrated later and applied back to the papermade sheet. The sheet manufactured by this method is called a papermade sheet.

[0101] The casting method is a method of manufacturing a sheet by spreading (casting) a mixture containing tobacco powder, a humectant, a binder, either one or both of a flavoring agent or a molding aid on a base material and drying it. The mixture may contain a molding aid and a medium such as water as required. The sheet manufactured by this method is called a cast sheet.

[0102] The non-woven fabric coating method is a method of manufacturing a sheet by coating a non-woven fabric with a mixture containing tobacco powder, a humectant, a binder, either one or both of a flavoring agent or a molding aid. The sheet manufactured by this method is called a non-woven fabric sheet.

Example

[0103] Hereinafter, specific examples of the present embodiment will be described, but the present invention is not limited thereto.

[0104] [Example 1] Tobacco lamina (leaf tobacco) was dry-ground with a Hosokawa Micron ACM machine to obtain tobacco powder. For the tobacco powder, using a Mastersizer (trade name, manufactured by Malvern Panalytical Business Unit, Spectris Co., Ltd.), the cumulative 50% particle size (D50) and cumulative 90% particle size (D90) in the volume-based particle size distribution by the dry laser diffraction method were measured, and they were 57 μm and 216 μm, respectively.

[0105] Using the tobacco powder, a tobacco sheet was produced by a rolling method. Specifically, 87 parts by mass of the tobacco powder, 12 parts by mass of glycerin as an aerosol generating agent, and 1 part by mass of carboxymethyl cellulose as a molding agent were mixed and kneaded using an extrusion molding machine. The kneaded material was formed into a sheet shape using two pairs of metal rolls and dried in a hot air circulation oven at 80 °C to obtain a tobacco sheet. The tobacco sheet was cut into a size of 0.8 mm × 9.5 mm using a shredder.

[0106] The swelling property of the cut tobacco sheet was measured. Specifically, after the cut tobacco sheet was stored 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 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. 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 of Comparative Example 1 described later.

[0107] [Example 2] A tobacco sheet was produced and evaluated in the same manner as in Example 1, except that a tobacco powder having a cumulative 50% particle diameter (D50) and a cumulative 90% particle diameter (D90) of 121 μm and 389 μm, respectively, in the volume-based particle size distribution by the dry laser diffraction method was used as the tobacco powder. The results are shown in Table 1.

[0108] [Example 3] A tobacco sheet was produced and evaluated in the same manner as in Example 1, except that a tobacco powder having a cumulative 50% particle diameter (D50) and a cumulative 90% particle diameter (D90) of 225 μm and 623 μm, respectively, in the volume-based particle size distribution by the dry laser diffraction method was used as the tobacco powder. The results are shown in Table 1.

[0109] [Comparative Example 1] As the tobacco powder, a tobacco sheet was produced and evaluated in the same manner as in Example 1, except that the tobacco powder having a cumulative 50% particle diameter (D50) and a cumulative 90% particle diameter (D90) in the volume-based particle size distribution by the dry laser diffraction method were 32 μm and 84 μm, respectively. The results are shown in Table 1.

[0110]

Table 1

[0111] From Table 1, in the tobacco sheets of Examples 1 to 3 which are the tobacco sheets according to the present embodiment, the swelling property was improved as compared with the tobacco sheet of Comparative Example 1 in which the D90 of the tobacco powder measured by the dry laser diffraction method was less than 200 μm. In Examples 1 to 3, the tobacco sheet was manufactured by the rolling method, but the swelling property was also improved when the tobacco sheet was manufactured by the casting method in the same manner.

[0112] Hereinafter, the first aspect will be described with reference to Reference Example A and Reference Comparative Example A. [Reference Example A1] Tobacco leaves were pulverized using a pulverizer (ACM-5 manufactured by Hosokawa Micron) so that D90 became 400 μm to obtain leaf tobacco particles. D90 was measured with a Mastersizer (manufactured by Malvern). The leaf tobacco 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 generator 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.

[0113] 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 round rectangle, and the screw rotation speed was 60 rpm.

[0114] 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 Machine 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 250 μm having a film / wet sheet / film layer structure. The roll gaps in the first to fourth stages were 1100 μm, 500 μm, 300 μm, and 200 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.

[0115] 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, the other film was peeled off and the wet sheet was dried under the same conditions to manufacture and evaluate the tobacco sheet of this embodiment.

[0116]

Table A1

[0117] In the mass of the wet powder in Table A1, 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.

[0118] [Reference Examples A2, A3] Tobacco sheets were manufactured and evaluated in the same manner as in Reference Example A1, except that leaf tobacco particles with D90 of 600 μm and 800 μm were used, respectively.

[0119] [Reference Comparative Examples A1, A2] Tobacco sheets were manufactured and evaluated in the same manner as in Reference Example A1, except that leaf tobacco particles with D90 of 80 μm and 200 μm were used, respectively.

[0120] [Reference Example A4] A tobacco sheet was produced and evaluated in the same manner as in Reference Example A1, except that leaf tobacco particles with a D90 of 200 μm were used and the mass ratio of water in the wet powder was 50 WB mass %.

[0121] [Reference comparative examples A3 and A4] Tobacco sheets were produced and evaluated in the same manner as in Reference Example A1, except that leaf tobacco particles with a D90 of 200 μm were used and the mass proportions of water in the wet powder were set to 30 and 40 WB mass%, respectively. The results are shown in Table A3. The "amount of water in the wet powder" in Table A3 corresponds to the amount of water in the mass proportion in the wet powder in Table A1.

[0122] [Reference Example A5 and Reference Comparative Example A5] According to the standard method, the sheet density is 0.75g / cm 3 and 0.96 g / cm 3 A tobacco sheet (Reference Example A5) having a sheet density of 1.19 g / cm 3 A tobacco sheet (Reference Comparative Example A5) was manufactured using each of the tobacco sheets. A smoking test was carried out using the obtained tobacco sheets, and it was confirmed that the smoking article using the sheet of Reference Example A5 had a better delivery of flavor components at the early stage of puffing than the smoking article using the sheet of Reference Comparative Example A5. From this, it was inferred that the smoking articles using the tobacco sheets obtained in Reference Examples A1 to A3 also had a better delivery of flavor components at the early stage of puffing.

[0123] The evaluation method is explained below. [Smoking test] A non-combustion heating type smoking system as shown in Fig. 2 was prepared. However, in this example, an internally heated type smoking system was used. Next, a Cambridge filter was connected to the mouthpiece end. The tobacco sheets prepared in each example were cut to prepare flakes. The flakes were filled at 70% by volume into a trumpet 22 with a length of 12 mm and a diameter of 7 mm to prepare a tobacco segment 20A. The system was subjected to a smoking test using a smoking machine. Specifically, using an automatic smoking device (R-26 manufactured by Borgwaldt KC Inc.), the sample was automatically smoked under the conditions of a smoking capacity of 27.5 ml / second, a smoking time of 2 seconds / puff, a smoking frequency of 2 puffs / minute, and 14 puffs, and particulate matter in the tobacco smoke for each puff was collected with a Cambridge filter (CM-133 manufactured by Borgwaldt KC Inc.). The Cambridge filter after the smoking test was shaken in 10 mL of methanol (reagent grade, manufactured by Wako Pure Chemical Industries, Ltd.) to obtain an analytical sample. 1 μL of the obtained analytical sample was collected with a microsyringe and analyzed by gas chromatography-mass spectrometry (GC-MSD manufactured by Agilent, GC: 7890A, MS: 5975C).

[0124] [Density] The tobacco sheet was cut out into a 55 mm square, the mass (dry matter mass) was measured, and the mass per unit area (basis weight) was calculated. Also, the thickness was measured with a thickness gauge (manufactured by Mitutoyo), and the density was calculated from the basis weight and the thickness.

[0125] [Reference Example A5-1] The above Reference Example A5 was reproduced. That is, a tobacco sheet was manufactured as follows. 1) The tobacco lamina was pulverized with a lab mill to obtain tobacco particles with a raw material particle size D90 = 300 μm. 2) The softwood pulp was disintegrated with a lab mill. 3) These powdery materials were put into a Ken mixer and stirred and mixed. 4) Water, glycerin, and Sanrose F30MC (cellulose ether manufactured by Nippon Paper Industries Co., Ltd.) as a binder were put into a disperser (manufactured by Primix) and mixed for 30 minutes. 5) The pulp was added to this mixture and dispersed with a disperser (manufactured by Primix) for 30 minutes. 6) The mixture obtained in 5) was cast onto an iron plate. 7) The iron plate on which the cast film was formed was placed in a ventilation dryer set at 80 °C and dried for 30 minutes, and then peeled off from the iron plate to obtain a tobacco sheet.

[0126]

Table A2

[0127] In the mass of the wet powder in Table A2, the tobacco leaf powder, glycerin, and binder indicate the dry matter mass, and water indicates the total mass of the charged mass and the water mass contained in the tobacco leaf powder, glycerin, and binder.

[0128] [Reference Example A6] A tobacco sheet was produced and evaluated in the same manner as in Reference Example A5-1, except that tobacco particles with a D90 of 80 μm were used. The results are shown in Table A3.

[0129]

Table A3

[0130] Hereinafter, the second aspect will be described with reference to Reference Example B and Comparative Reference Example B. [Reference Example B1] Tobacco leaves were pulverized using a pulverizer (ACM-5 manufactured by Hosokawa Micron) so that D90 became 70 μm to obtain tobacco particles. D90 was measured with a Mastersizer (manufactured by Malvern). The tobacco particles and carboxymethyl cellulose (manufactured by Nippon Paper Industries Co., Ltd., trade name Sunrose F30MC) as a binder were dry-blended using a mixer. Next, glycerin as a humectant and water as a medium were added to the dry blend, and the mixture was mixed with a mixer to prepare a wet powder. The formulation of each component is as shown in Table B1.

[0131] Using a kneader (manufactured by Dalton, model DG-1), 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 set at 38.5 rpm.

[0132] 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 4 steps until it reached a predetermined thickness (exceeding 100 μm) to prepare a laminate with a thickness of 105 μm having a layer structure of film / wet sheet / film. The roll gaps for the 1st to 4th steps were 650 μm, 330 μm, 180 μm, and 5 μm, respectively. The roll gap for the 4th step 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.

[0133] 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. Then, the other film was peeled off, and the wet sheet was dried under the same conditions to produce the sheet of this embodiment.

[0134] The sheet thus obtained was left standing for 48 hours under the conditions of room temperature 22°C and relative humidity 60%. Then, using a laser processing device (manufactured by TROTEC), a plurality of apertures with an aperture size of 0.2 mm × 0.2 mm were provided in the sheet. The aperture intervals were equally spaced at 0.4 mm. The detailed conditions are shown in Table B2. For the processed tobacco sheet thus obtained, the air permeability and release profile were evaluated by the method described later. The results are shown in Table B2 and Figure 4. The vertical axis in Figure 4 shows the nicotine amount normalized by the nicotine amount per flavor smoking article. That is, when the nicotine amount detected in 1 puff is x (g) and the nicotine amount per stick (total nicotine amount in 1 to 14 puffs) is y (g), the value of x / y is plotted on the vertical axis.

[0135] <Air permeability> The sheet after perforation was left standing for 48 hours under the conditions of a room temperature of 22°C and a relative humidity of 60%. Subsequently, this sheet was cut into a size of 40 mm × 240 mm, and using an air permeability measuring device (PPM1000M manufactured by Cerulean), the measurement conditions were a differential pressure of 1 kPa and a circular measuring head of 2 cm 2 and the measurement was carried out. The measurement environment was a room temperature of 22°C and a relative humidity of 60%. Also, the air permeability was calculated as the air passing flow rate (cm 2 ) per 1 cm per minute under the condition of a differential pressure of 1 kPa. 3 )

[0136] <Component Release Profile> 1) The sheet after perforation was left standing for 48 hours under the conditions of a room temperature of 22°C and a relative humidity of 60%. 2) The thickness and basis weight were measured, and the sheet density was calculated. 3) The sheet was cut into a size of 55 mm × 0.8 mm. 4) The sheet after cutting was filled into a φ7.1 sheath paper to a predetermined volume filling ratio and then cut into 12 mm lengths. 5) A 12 mm long smoking segment (tobacco segment), a filter, and a paper tube were connected to manufacture a smoking test roll (aroma attracting article). 6) A non-combustion heating type smoking system as shown in Figure 2 was prepared. However, in this example, an internal heating type smoking system was used. Subsequently, a Cambridge filter was connected to the suction port end. The sheets prepared in each example were cut to prepare flakes. The said flakes were filled into a trumpet 22 with a length of 12 mm and a diameter of 7 mm at 70% by volume, TobaccoSegment 20A was prepared. The system was subjected to a smoking test using a smoking machine. Specifically, using an automatic smoking device (R-26 manufactured by Borgwaldt KC Inc.), the sample was automatically smoked under the conditions of a smoking volume of 27.5 ml / second, a smoking time of 2 seconds / puff, a smoking frequency of 2 puffs / minute, and 14 puffs. The particulate matter in the tobacco smoke for each puff was collected using a Cambridge filter (CM-133 manufactured by Borgwaldt KC Inc.). The Cambridge filter after the smoking test was shaken in 10 mL of methanol (reagent grade, manufactured by Wako Pure Chemical Industries, Ltd.) to obtain an analytical sample. 1 μL of the obtained analytical sample was collected with a microsyringe and analyzed by gas chromatography-mass spectrometry (GC-MSD manufactured by Agilent, GC: 7890A, MS: 5975C).

[0137]

Table B1

[0138] [Reference Examples B2 to B4, Reference Comparative Example B1] Sheets having an air permeability as shown in Table B2 were prepared by changing the laser processing conditions. Using each sheet and except for changing the filling rate, smoking test rolls were prepared and evaluated in the same manner as in Reference Example B1. The results are shown in FIG. 4.

[0139]

Table B2

[0140] As shown in the figure, the smoking article using the sheet of this embodiment can achieve an excellent profile in that the delivery of the initial puff is high and the delivery equivalent to that of the conventional sheet can be ensured even in the latter half.

[0141] Embodiments are shown below. [1] A tobacco sheet for a non-combustion heating type flavor absorber, comprising tobacco powder having a cumulative 90% particle diameter (D90) of 200 μm or more in a volume-based particle size distribution measured by a dry laser diffraction method. [2] The tobacco sheet for a non-combustion heating type flavor inhaler according to [1], wherein the tobacco powder is at least one tobacco raw material selected from the group consisting of leaf tobacco, midrib, and stalk. [3] The tobacco sheet for a non-combustion heating type flavor inhaler according to [1] or [2], wherein the proportion of the tobacco powder contained in 100% by mass of the tobacco sheet is 45 to 95% by mass. [4] The tobacco sheet for a non-combustion heating type flavor inhaler according to any one of [1] to [3], wherein the tobacco sheet further contains an aerosol generator. [5] The tobacco sheet for a non-combustion heating type flavor inhaler according to [4], wherein the aerosol generator is at least one selected from the group consisting of glycerin, propylene glycol, and 1,3-butanediol. [6] The tobacco sheet for a non-combustion heating type flavor inhaler according to [4] or [5], wherein the proportion of the aerosol generator contained in 100% by mass of the tobacco sheet is 4 to 50% by mass. [7] The tobacco sheet for a non-combustion heating type flavor inhaler according to any one of [1] to [6], wherein the tobacco sheet further contains a molding agent. [8] The tobacco sheet for a non-combustion heating type flavor inhaler according to [7], wherein the molding agent is at least one selected from the group consisting of polysaccharides, proteins, and synthetic polymers. [9] The tobacco sheet for a non-combustion heating type flavor inhaler according to [7] or [8], wherein the proportion of the molding agent contained in 100% by mass of the tobacco sheet is 0.1 to 15% by mass.

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

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

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

[0142] (1) A tobacco sheet having a density of 1.0 g / cm 3 or less. (2) The sheet according to (1), which is a pressure-formed sheet. (3) A sheet according to (1) or (2), which is a wet powder containing tobacco particles with D90 of 200 μm or more and a liquid medium, and is produced from a wet powder with a water content of 50% by mass or more in the wet powder. (4) A sheet according to any one of (1) to (3), which contains tobacco particles with D90 of 300 μm or more. (5) A sheet according to (4), which contains tobacco particles with D90 of 500 μm or more. (6) A non-combustible heating type smoking article comprising the tobacco sheet according to any one of (1) to (5) or a material derived therefrom. (7) At least step 1 of kneading tobacco particles, 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, and step 3 of drying the wet sheet, A manufacturing method according to any one of (1) to (5), comprising Of the tobacco sheet steps. (8) The manufacturing method according to (7), wherein the medium contains water. (9) The manufacturing method according to (7) or (8), wherein step 2 includes preparing a laminated sheet in which a wet sheet exists between two base films. (10) The manufacturing method according to any one of (7) to (9), wherein step 1 includes kneading at least a tobacco material, a binder, and a medium with a single-screw or multi-screw kneader. (11) The manufacturing method according to any one of (7) to (10), wherein the mixture contains 20 to 80% by mass of the medium based on the total amount of the mixture.

[0143] <1> A smoking composition sheet, that is, a tobacco sheet, comprising a humectant, a binder, and either or both of a flavoring agent or a molding aid, and having an air permeability of more than 0 Coresta unit. <2> The sheet according to <1>, wherein the air permeability is 500 Coresta units or more. <3>The sheet according to <1> or <2>, wherein the flavoring agent is selected from the group consisting of tobacco, fragrance, and combinations thereof. <4>The sheet according to any one of <1> to <3>, wherein the humectant is a polyhydric alcohol. <5>The sheet according to any one of <1> to <4>, wherein the binder is selected from the group consisting of polysaccharides, proteins, synthetic polymers, and combinations thereof. <6>The sheet according to any one of <1> to <5>, wherein the molding aid is pulp or non-woven fabric of vegetable fiber or synthetic fiber. <7>The sheet according to any one of <1> to <6>, which is a pressure-molded sheet. <8>The sheet according to any one of <1> to <6>, which has a plurality of holes provided by physical processing. <9>The sheet according to any one of <1> to <7>, which has a plurality of holes provided by chemical processing.

Explanation of Signs

[0144] 1 Non-combustion heating type flavor attractor 2 Tobacco-containing segment 3 Cooling segment 4 Center hole segment 5 Filter segment 6 Mouthpiece segment 7 Cylindrical member 8 Perforation 9 Second filling layer 10 Second inner plug wrapper 11 Outer plug wrapper 12 Mouthpiece lining paper 13 Heating device 14 Body 15 Heater 16 Metal tube 17 Battery unit 18 Control unit 19 Concave portion 20A Tobacco-containing segment 21 Filler 22 wrapper T tobacco sheet

Claims

1. A tobacco sheet for a non-combustion heating type flavor inhaler, comprising tobacco powder having a cumulative 90% particle diameter (D90) of 350 μm or more in a volume-based particle size distribution measured by a dry laser diffraction method. The density is 1.0 g / cm ３ or less, A tobacco sheet for a non-combustion heating type flavor inhaler.

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

3. Further comprising a humectant, a binder, either one or both of a flavorant or a molding aid, and having an air permeability of more than 0 Coresta units. The sheet according to Claim 1 or 2, having an air permeability of more than 0 Coresta units.

4. The sheet according to Claim 3, wherein the air permeability is 500 Coresta units or more.

5. A non-combustion heating type flavor inhaler comprising a tobacco-containing segment including the tobacco sheet for a non-combustion heating type flavor inhaler according to Claim 1 or 2. A non-combustion heating type flavor inhaler.

6. A non-combustion heating type flavor inhalation system comprising the non-combustion heating type flavor inhaler according to Claim 5, and a heating device for heating the tobacco-containing segment. A non-combustion heating type flavor inhalation system.

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