Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B3/00—Preparing tobacco in the factory
  • A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
  • A24B15/14—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco made of tobacco and a binding agent not derived from tobacco
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
  • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances

Definitions

• the present invention relates to tobacco sheets, methods for producing tobacco sheets, tobacco fillers, and smoking articles.
• Imitation tobacco is a tobacco material made by artificially forming tobacco leaves into a paper-like form, and is also called tobacco sheet.
• Known methods for manufacturing such tobacco sheets include, for example, a papermaking process, a slurry (cast) process, a rolling process, and an extrusion molding process.
• Patent Document 1 discloses that the smaller the particle size of the tobacco, the greater the surface area that bonds the tobacco particles together, improving the strength of the tobacco sheet, and that a uniform sheet can be created by using a particle size of 60 mesh to 400 mesh (56 ⁇ m to 375 ⁇ m).
• Patent Documents 2 and 3 also disclose that tobacco powder with a particle size of 30 to 120 ⁇ m is used, because the strength of the tobacco web decreases when the particle size of the tobacco is 150 ⁇ m or more when uniformed.
• Patent Documents 4 and 5 there is also technology for reducing the particle size of tobacco to nano size and using it as a raw material for the sheet.
• the particles are bound together with some kind of binder to produce a tobacco sheet having desired physical properties.
• the tobacco sheet produced in this manner is further cut into a desired tobacco shred state, and then molded into, for example, a tobacco rod shape.
• the tobacco sheet is added with water to a predetermined moisture content before cutting, taking into consideration the strength of the tobacco rod after molding and the moisture stability.
• the tobacco shreds will stick together after cutting, which makes it difficult to disentangle the individual tobacco pieces and causes quality problems such as dry spots during subsequent drying.
• an object of the present invention is to provide a tobacco sheet having improved water resistance.
• Another object of the present invention is to provide a tobacco sheet having an excellent sour-tasting smoking taste in addition to improved water resistance.
• a tobacco sheet containing a carboxyalkyl cellulose onium salt [2] The tobacco sheet according to [1], wherein the content of the carboxyalkyl cellulose onium salt is 1% by weight or more. [3] The tobacco sheet according to [1] or [2], further comprising an aerosol generating agent. [4] The tobacco sheet according to any one of [1] to [3], further comprising non-pulp fibers. [5] The tobacco sheet according to any one of [1] to [4], which has an ease of disentanglement of 50 seconds or more in accordance with a disentanglement test. [6] The tobacco sheet according to any one of [1] to [5], having a moisture content of 9 to 15% by weight.
• a tobacco filler comprising the tobacco sheet according to any one of [1] to [7].
• a smoking article comprising the tobacco filler described in [11].
• the smoking article according to [12] which is a non-combustion heating type smoking article.
• the tobacco sheet of the present invention can improve water resistance. In some cases, the tobacco sheet of the present invention can also provide an excellent sour-tasting smoking experience in addition to improved water resistance.
• FIG. 1 is a schematic cross-sectional view showing an example of a non-combustion heating type smoking article.
• FIG. 2 is a schematic cross-sectional view showing an example of a non-combustion heating type smoking system.
• the tobacco sheet The tobacco sheet, the method for producing the tobacco sheet, the tobacco filler, and the smoking article of the present invention are described below.
• the tobacco sheet of the present invention contains a carboxyalkyl cellulose onium salt.
• the alkyl of the carboxyalkyl cellulose onium salt is not particularly limited, but is preferably an alkyl having 1 to 3 carbon atoms, more preferably methyl, ethyl or a combination thereof, and most preferably methyl.
• the onium salt of the carboxymethylcellulose onium salt is not particularly limited, but may be an ammonium salt, a phosphonium salt, an oxonium salt, a sulfonium salt, a fluoronium salt, a chloronium salt, a bromonium salt, an iodonium salt, or a combination of two or more of these. Among these, an ammonium salt is preferred, and a quaternary ammonium salt is more preferred.
• the carboxymethylcellulose onium salt is not particularly limited, but may include or consist of carboxymethylcellulose ammonium salt, carboxymethylcellulose calcium salt, or a combination of two or more of them. Among these, carboxymethylcellulose ammonium salt is preferred. By using carboxymethylcellulose ammonium salt, a sour taste can be obtained.
• the content of the carboxyalkyl cellulose onium salt in the tobacco sheet is not particularly limited, but is preferably 1% by weight or more, more preferably 1 to 15% by weight, and most preferably 2 to 8% by weight. By having the content of the carboxyalkyl cellulose onium salt within the above numerical range, the sheet shape can be strengthened.
• the tobacco sheet may further include an aerosol generating agent.
• the type of aerosol generating agent is not particularly limited, and various extracts from natural products and/or their constituents can be selected depending on the application.
• the aerosol generating agent can contain or consist of glycerin, propylene glycol, polyhydric alcohols such as sorbitol, xylitol, and erythritol, triacetin, 1,3-butanediol, or a mixture of two or more of these.
• glycerin is preferred. The use of glycerin can ensure a stable amount of smoke.
• the content of the aerosol generating agent in the tobacco sheet is not particularly limited, but is preferably 5 to 35% by weight, more preferably 7 to 25% by weight, and most preferably 10 to 15% by weight. By keeping the aerosol generating agent within the above numerical range, a more stable amount of smoke is generated.
• Non-pulp fiber The tobacco sheet may further comprise non-pulp fibers.
• Non-pulp fibers are fibers other than pulp fibers. Pulp fibers are an aggregate of cellulose fibers extracted from plants such as wood, and are usually used as a raw material for paper. Examples of pulp fibers include waste paper pulp, chemical pulp, and mechanical pulp. In the present application, non-pulp fibers are preferably derived from plants. Plant-derived fibers are biodegradable and therefore have a small environmental impact.
• Conventional tobacco materials such as tobacco sheets are based on pulp fibers such as wood pulp, i.e., vegetable fiber bundles (for example, US Patent No. 5,322,076).
• wood pulp is composed of a fiber bundle of multiple single fibers with a fiber diameter of 20 ⁇ m, and the fiber diameter of wood pulp is about 100 to 200 ⁇ m, and the fiber length is about 1000 to 2000 ⁇ m.
• the sheet becomes thick at 100 to 300 ⁇ m, and the thermal conductivity decreases.
• non-pulp fibers are used in the present application, a thin sheet with excellent mechanical strength can be formed and excellent thermal conductivity can be achieved.
• the average fiber diameter of the non-pulp fibers is preferably 25 ⁇ m or less, more preferably 20 ⁇ m or less, and even more preferably 15 ⁇ m or less. There is no lower limit to the average fiber diameter, but it is 2 nm or more, 10 nm or more, 100 nm or more, 1 ⁇ m or more, or 5 ⁇ m or more.
• the average fiber diameter of non-pulp fibers can be determined by acquiring an image of the fiber, measuring the width (short axis) of multiple fibers, and averaging these values. If the fiber shape is columnar (rectangular in cross section), the width of the main surface (the longer one) is taken as the width of the fiber. The number of fibers measured is preferably 100 or more.
• the non-pulp fibers are preferably monofilamented cellulose.
• Monofilamented cellulose is a thin fiber obtained by subjecting pulp fibers to a process such as defibration.
• Monofilamented cellulose may be chemically modified by oxidation or the like.
• the average fiber diameter of monofilamented cellulose is as described above. There are no limitations on the average fiber length of monofilamented cellulose, but the upper limit is preferably 2000 ⁇ m or less, more preferably 1500 ⁇ m or less. The lower limit is preferably 100 ⁇ m or more, more preferably 500 ⁇ m or more.
• the non-pulp fiber is preferably dietary fiber.
• Dietary fiber is a food component that is not digested by human digestive enzymes, and in the present application, it is more preferable that the dietary fiber is insoluble in water.
• the dietary fiber may be porous, i.e., spongy. Porous fiber can increase the surface area of the sheet for smoking articles and improve the thermal conductivity of the sheet. From the viewpoint of availability, the fiber is preferably citrus fiber.
• Citrus fiber is a fiber whose main raw material is the albedo of citrus fruits. The average fiber diameter of citrus fiber is as described above.
• the dietary fiber may be short fiber or columnar particles with a small aspect ratio.
• monofilamented cellulose and dietary fiber are used in combination. By using both in combination, the strength, water dispersibility, and smoke sensation of the tobacco sheet are improved.
• the upper limit of the weight of monofilamented cellulose per 1 part by weight of dietary fiber is preferably 1.5 parts by weight or less, more preferably 1.2 parts by weight or less, and the lower limit is preferably 0.1 or more, more preferably 0.3 or more.
• the amount of non-pulp fiber in the tobacco sheet is not particularly limited, but is preferably 30 to 50% by weight, more preferably 35 to 45% by weight, and most preferably 37.5 to 40% by weight. If the amount of non-pulp fiber is within the above range, the non-pulp fiber is appropriately contained, which makes it easier for the sheet to maintain its shape.
• the tobacco sheet may further contain an antioxidant, inulin, reducing sugar, or a combination of two or more of these.
• an antioxidant inulin, reducing sugar, or a combination of two or more of these.
• antioxidants are preferred. The use of antioxidants makes it less likely that the TSNA component of concern will increase.
• Tobacco sheets can be obtained by forming a composition containing aged tobacco leaves into a sheet shape.
• aged tobacco leaves used for tobacco sheets, but examples include leaves that have been deboned and separated into lamina and midrib.
• sheet refers to a shape that has a pair of roughly parallel main surfaces and side surfaces.
• a variety of tobacco varieties can be used for the tobacco sheet. Examples include flue-cured, burley, oriental, native, other Nicotiana tabacum varieties, and Nicotiana rustica varieties. These varieties can be used alone, but in order to obtain the desired flavor, they can also be blended during the process from tobacco leaf harvest to the process of converting aged tobacco leaves into various forms (i.e., processed tobacco leaves) used in non-combustion heat-not-burn tobacco products. Details of the tobacco varieties are disclosed in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."
• the tobacco sheet may be a cast sheet, a formed sheet, or a rolled sheet.
• the method for forming the tobacco sheet will be described later in Section "2. Method for producing the tobacco sheet.”
• the ease of disentanglement of the tobacco sheet is not particularly limited, but the ease of disentanglement according to the disentanglement test is preferably 50 seconds or more, more preferably 55 to 600 seconds, and most preferably 55 to 300 seconds.
• the ease of disentanglement according to the disentanglement test can also be 600 seconds or less or 600 seconds or more.
• the ease of disentanglement according to the disentanglement test indicates the water resistance of the tobacco sheet, and a higher value of the ease of disentanglement means a higher water resistance of the tobacco sheet.
• the method described in JP-B-60-45914 is used as a method for measuring the ease of disentanglement according to the above disentanglement test.
• the ease of disentanglement according to the above-mentioned disentanglement test can be measured based on the procedure and method described in "1. Water resistance” (Evaluation method) of the Examples below. In the procedure and method described in “1. Water resistance” (Evaluation method) of the Examples below, the total time of shaking for 5 seconds and leaving to stand for 55 seconds is the time of ease of disentanglement. For example, in the Examples below, if the evaluation of water resistance after repeating the shaking for 5 seconds and leaving to stand for 55 seconds 10 times is good or very good, the ease of disentanglement can be determined to be 600 seconds or more.
• the moisture content of the tobacco sheet is not particularly limited, but is preferably 9 to 15% by weight, more preferably 10 to 14.5% by weight, and most preferably 10 to 14% by weight. By having the moisture content of the tobacco sheet within the above numerical range, moisture fluctuations are small even when the environmental humidity changes.
• the moisture content of the tobacco sheet can be measured using an IR moisture meter.
• Method for producing tobacco sheet comprises the steps of: A method for producing the tobacco sheet described in "1. Tobacco sheet” above, comprising the step of forming a composition containing tobacco leaves to obtain the tobacco sheet.
• the method for forming tobacco sheets is not particularly limited, but for example, tobacco powder, nicotine, a flavor development aid, binder, and optionally an aerosol generating agent and flavoring can be mixed, water can be added to the mixture, kneaded, and the resulting kneaded material can be formed by known methods such as papermaking, casting, rolling, etc. Details of various tobacco sheets formed by such methods are disclosed in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."
• the method for producing a tobacco sheet can include a step of heating (drying) a composition containing tobacco leaves.
• the heating temperature in the step of heating the tobacco leaf-containing composition is not particularly limited, but is preferably 80°C or higher, more preferably 100°C or higher, and most preferably 100 to 140°C.
• the heating time in the step of heating the composition containing tobacco leaves is not particularly limited, but is preferably 10 minutes or more, more preferably 30 minutes or more, and most preferably 30 to 60 minutes.
• the combination of heating temperature and time in the step of heating the composition containing tobacco leaves can be a temperature of 130° C. or higher for 10 minutes or more, a temperature of 80° C. or higher for 60 minutes or more, a temperature of 100° C. or higher for 60 minutes or more, or a temperature of 120° C. or higher for 30 minutes or more.
• the method for producing a tobacco sheet may further include a multi-stage drying process in which the drying step described above is divided into multiple steps.
• the temperature during the multiple drying steps in the multi-stage drying process may be the same as the heating temperature in the drying step described above.
• the total time for the multiple drying steps in the multi-stage drying process may be the same as the heating time in the drying step described above.
• the tobacco filler of the present invention comprises the tobacco sheet described in "1. Tobacco Sheet” above.
• the tobacco filler may also consist of the tobacco sheet described above in “1. Tobacco sheet.”
• a tobacco filler refers to a filler in which processed tobacco leaves are filled in a predetermined manner.
• the "filler” is the object into which processed tobacco leaves are filled, and is a part of a tobacco product.
• the filler include, but are not limited to, a cylindrical cigarette paper or a container with an air inlet and outlet.
• Examples of ways in which the processed tobacco leaves are filled into the filling material include, but are not limited to, a way in which the processed tobacco leaves are filled by wrapping them in cigarette paper with the processed tobacco leaves on the inside (hereinafter also referred to as a "tobacco rod”), and a way in which the processed tobacco leaves are filled into a flow path of a container having an air inlet and outlet (hereinafter also referred to as a "tobacco cartridge").
• a tobacco filler consisting of a tobacco sheet filled into a filling material can be used as the tobacco filler.
• the smoking article of the present invention contains the tobacco filler described above in "3. Tobacco filler.”
• the smoking article may be a non-combustion heated smoking article.
• Smoking articles include flavor inhalation articles, which allow users to inhale and enjoy the flavor, and smokeless tobacco (smokeless smoking articles), which allow users to enjoy the flavor by inhaling the product directly into their nasal or oral cavity.
• Flavor inhalation articles can be broadly divided into combustible smoking articles, typified by conventional cigarettes, and non-combustible smoking articles.
• Examples of combustible smoking articles include cigarettes, pipes, pipes, cigars, and cigarillos.
• a non-combustion heated smoking article may be heated by a heating device separate from the article, or by a heating device integrated into the article.
• the non-combustion heated smoking article and the heating device are collectively referred to as a "non-combustion heated smoking system.”
• An example of a non-combustion heated smoking system is described below with reference to Figures 1 and 2.
• FIG. 1 is a cross-sectional view of a non-combustion heating smoking article 20.
• the non-combustion heating smoking article 20 (hereinafter simply referred to as "smoking article 20") has a cylindrical shape.
• the circumferential length of the smoking article 20 is preferably 16 mm to 27 mm, more preferably 20 mm to 26 mm, and even more preferably 21 mm to 25 mm.
• the overall length (horizontal length) of the smoking article 20 is not particularly limited, but is preferably 40 mm to 90 mm, more preferably 50 mm to 75 mm, and even more preferably 50 mm to 60 mm.
• the smoking article 20 is composed of a smoking segment 20A, a filter portion 20C that forms the mouthpiece, and a connecting portion 20B that connects these.
• the smoking segment 20A is cylindrical, and its overall length (length in the axial direction) is, for example, preferably 5 to 100 mm, more preferably 10 to 50 mm, and even more preferably 10 to 25 mm.
• the cross-sectional shape of the smoking segment 20A is not particularly limited, but can be, for example, circular, elliptical, polygonal, etc.
• the smoking segment 20A has a smoking composition sheet or material derived therefrom 21 and a wrapper 22 wrapped around it.
• the smoking composition sheet or material derived therefrom 21 may contain a flavoring.
• the filter section 20C has a cylindrical shape.
• the filter section 20C has a rod-shaped first segment 25 filled with cellulose acetate fiber, and a rod-shaped second segment 26 similarly filled with cellulose acetate fiber.
• the first segment 25 is located on the smoking segment 20A side.
• the first segment 25 may have a hollow portion.
• the second segment 26 is located on the mouthpiece side.
• the second segment 26 is solid.
• the first segment 25 is composed of a first filling layer (cellulose acetate fiber) 25a and an inner plug wrapper 25b wrapped around the first filling layer 25a.
• the second segment 26 is composed of a second filling layer (cellulose acetate fiber) 26a and an inner plug wrapper 26b wrapped around the second filling layer 26a.
• the first segment 25 and the second segment 26 are connected by an outer plug wrapper 27.
• the outer plug wrapper 27 is adhered to the first segment 25 and the second segment 26 with a vinyl acetate emulsion adhesive or the like.
• the length of the filter portion 20C can be, for example, 10 to 30 mm
• the length of the connecting portion 20B can be, for example, 10 to 30 mm
• the length of the first segment 25 can be, for example, 5 to 15 mm
• the length of the second segment 26 can be, for example, 5 to 15 mm.
• the first segment 25 (center hole segment) is composed of a first filling layer 25a having one or more hollow portions, and an inner plug wrapper 25b that covers the first filling layer 25a.
• the first segment 25 has the function of increasing the strength of the second segment 26.
• the first filling layer 25a of the first segment 25 is densely packed with, for example, cellulose acetate fibers.
• a plasticizer containing triacetin is added to the cellulose acetate fibers in an amount of, for example, 6 to 20% by mass relative to the mass of the cellulose acetate, and the fibers are hardened.
• the hollow portion of the first segment 25 has an inner diameter of, for example, ⁇ 1.0 to ⁇ 5.0 mm.
• the first packed layer 25a of the first segment 25 may be constructed with, for example, a relatively high fiber packing density, or may be equivalent to the fiber packing density of the second packed layer 26a of the second segment 26 described below. Therefore, during inhalation, air and aerosol flow only through the hollow portion, and almost no air or aerosol flows through the first packed layer 25a. For example, if it is desired to reduce the loss of aerosol components due to filtration in the second segment 26, the length of the second segment 26 can be shortened and the first segment 25 can be lengthened accordingly.
• Replacing the shortened second segment 26 with the first segment 25 is effective in increasing the amount of aerosol components delivered. Because the first filling layer 25a of the first segment 25 is a fiber-filled layer, the feel from the outside during use does not cause discomfort to the user.
• the second segment 26 is composed of a second packed layer 26a and an inner plug wrapper 26b that covers the second packed layer 26a.
• the second segment 26 (filter segment) is packed with cellulose acetate fibers at a typical density and has typical filtering performance for filtering aerosol components.
• the filtering performance for filtering the aerosol (mainstream smoke) emitted from the smoking segment 20A may be different between the first segment 25 and the second segment 26. At least one of the first segment 25 and the second segment 26 may contain a flavoring.
• the structure of the filter portion 20C is arbitrary, and may be a structure having multiple segments as described above, or may be composed of a single segment.
• the filter portion 20C may also be composed of one segment. In this case, the filter portion 20C may be composed of either the first segment or the second segment.
• the connecting part 20B is cylindrical.
• the connecting part 20B has a cardboard tube 23 formed into a cylindrical shape, for example, from cardboard.
• the connecting part 20B may be filled with a cooling material for cooling the aerosol.
• An example of the cooling material is a sheet of a polymer such as polylactic acid, which can be folded and filled.
• a support part may be provided between the smoking segment 20A and the connecting part 20B to prevent the position of the smoking segment 20A from fluctuating.
• the support part may be made of a known material, such as a center hole filter like the first segment 25.
• the wrapper 28 is wrapped around the outside of the smoking segment 20A, the connecting portion 20B, and the filter portion 20C in a cylindrical shape, connecting them together.
• One side (inner surface) of the wrapper 28 is coated entirely or almost entirely with a vinyl acetate emulsion adhesive, except for the area near the ventilation hole portion 24.
• the multiple ventilation hole portions 24 are formed by laser processing from the outside after the smoking segment 20A, the connecting portion 20B, and the filter portion 20C are integrated by the wrapper 28.
• the ventilation hole section 24 has two or more through holes penetrating the connecting section 20B in the thickness direction.
• the two or more through holes are formed so as to be arranged radially when viewed from an extension of the central axis of the smoking article 20.
• the ventilation hole section 24 is provided in the connecting section 20B, but may be provided in the filter section 20C.
• the two or more through holes of the ventilation hole section 24 are arranged in one row at a fixed interval on one ring, but may be arranged in two rows at a fixed interval on two rings, or one or two rows of the ventilation hole section 24 may be arranged discontinuously or irregularly.
• non-combustion heating smoking system includes a non-combustion heating smoking article 20 and a heating device 10 that heats the smoking segment 20A from the outside.
• the heating device 10 comprises a body 11, a heater 12, a metal tube 13, a battery unit 14, and a control unit 15.
• the body 11 has a cylindrical recess 16, and the heater 12 and metal tube 13 are arranged at a position corresponding to the smoking segment 20A to be inserted therein.
• the heater 13 can be a heater using electrical resistance, and the battery unit 14 supplies power to the heater 12 in response to an instruction from the control unit 15, which controls the temperature, to heat the heater 12.
• the heat generated by the heater 12 is transferred to the smoking segment 20A through the metal tube 13, which has high thermal conductivity.
• the heating device 10 is shown as heating the smoking segment 20A from the outside, but it may also be heating from the inside.
• the heating temperature by the heating device 10 is not particularly limited, but is preferably 400°C or less, more preferably 150 to 400°C, and even more preferably 200 to 350°C.
• the heating temperature refers to the temperature of the heater of the heating device 10.
• the tobacco sheets used in the experiments were composed of 76% by weight of tobacco raw material, 6% by weight of various binders, 12% by weight of glycerin, and 6% by weight of pulp relative to the entire tobacco sheet, and laminate sheets were prepared for each type of binder. Specifically, 152 g of tobacco raw material (flue-cured tobacco leaves), 12 g of pulp, and 12 g of various binders were mixed in a mixer (Kenmix KM250, manufactured by Aikosha Co., Ltd.), and 24 g of glycerin and 85 g of water were added to the resulting mixture to prepare a kneaded product.
• a mixer Kenmix KM250, manufactured by Aikosha Co., Ltd.
• the resulting kneaded product was rolled with a calendar roll (manufactured by Yuri Roll Co., Ltd.) and dried at 120°C to obtain laminate sheets (tobacco sheets) (length: 1000 mm, width: 250 mm, thickness: 0.25 mm) of Example 1 and Comparative Examples 1 to 3.
• 1 g of each of the obtained tobacco sheets was taken as a measurement sample, and the moisture content (wt %) of each tobacco sheet was measured using an IR moisture meter (heat-drying moisture meter MX-50, A&D Co., Ltd.).
• the moisture contents (wt %) of the various binders and tobacco sheets used in the preparation of the above tobacco sheets are shown in Table 1.
• the tobacco sheet of the present application has excellent water resistance. Furthermore, it was also found that the tobacco sheet of the present application has excellent sour taste in addition to water resistance.

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• 2022
  • 2022-12-12 WO PCT/JP2022/045650 patent/WO2024127456A1/ja not_active Ceased
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