JP7615181B2 - Non-combustion heated tobacco products - Google Patents

Description

The present invention relates to a non-combustion heated tobacco product and a non-combustion heated tobacco stick.

A non-combustion heated tobacco product is known that includes an electrically heated device having a heater assembly, a battery unit that serves as a power source for the heater assembly, a control unit that controls the heating element of the heater assembly, and the like, and a non-combustion heated tobacco stick used with the electrically heated device (see, for example, Patent Document 1). As an example, the non-combustion heated tobacco stick includes a tobacco rod portion that includes a tobacco filler containing tobacco raw materials (e.g., tobacco shreds, tobacco granules, a molded tobacco sheet, etc.) and an aerosol generating source (glycerin, propylene glycol, etc.) and a cigarette paper that wraps the tobacco filler, and a mouthpiece portion that is coaxially connected to the tobacco rod portion by being wrapped with tipping paper together with the tobacco rod portion.

When using an electrically heated tobacco product, a non-combustion heated tobacco stick is inserted into a chamber of a heater assembly in an electrically heated device through an insertion port, and the heating element of the heater assembly is heated by power supplied from a battery unit. As a result, the tobacco filler in the tobacco rod is heated, and an aerosol is generated from an aerosol generating source contained in the tobacco filler, and flavor components are delivered into the mouth.

International Publication No. 2017/198838 Patent No. 5877618

As a heating method for non-combustion heated tobacco sticks using an electric heating device, an external heating method is known in which the tobacco rod part is heated from the outer periphery by a heating part having a heating element arranged on the inner wall surface of a hollow tube that defines the chamber of the heater assembly. In such an external heating type electric heating device, it is important from the viewpoint of increasing the delivery amount of flavor components to improve heating efficiency by ensuring contact between the tobacco rod part inserted into the chamber and the heating part.

On the other hand, in some cases, a tobacco sheet is used as the tobacco raw material contained in the tobacco filler of the tobacco rod part of a non-combustion heating tobacco stick, and the tobacco sheet folded in a gathered shape is wrapped in cigarette paper to form the tobacco rod part. In this type of tobacco rod part, the folds of the tobacco sheet are defined along the axial direction of the tobacco rod part, so that a large number of aerosol flow paths are formed between the gathered folded tobacco sheet along the axial direction of the tobacco rod part.

However, in non-combustion heated tobacco sticks using tobacco sheets folded in a gather pattern on the tobacco raw material, the cross-sectional area of each aerosol flow path formed between the folded tobacco sheets is large. For this reason, for example, if a specification is adopted in which the tobacco rod portion inserted into the chamber of the device is compressed from the outer periphery by the inner wall surface of the chamber in order to increase the amount of flavor components delivered in the non-combustion heated tobacco stick, the aerosol flow path formed as a relatively large gap may be crushed when the tobacco rod portion is inserted into the chamber, resulting in a large change in airflow resistance during inhalation. Furthermore, since it is difficult to control the position of the aerosol flow path within the cross section of the tobacco rod portion during manufacturing, there is a concern that the airflow resistance during inhalation may easily vary from one non-combustion heated tobacco stick to another.

The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to provide a technology for ensuring the delivery amount of flavor components in a non-combustion heated tobacco stick when inhaled, and for suppressing variation in air resistance.

The technology according to the present invention is a non-combustion heated tobacco product comprising an electric heating device and a non-combustion heated tobacco stick used with the electric heating device, the non-combustion heated tobacco stick comprising a tobacco rod portion having a tobacco filler including tobacco shreds and a wrapping paper for wrapping the tobacco filler, and a mouthpiece portion connected coaxially to the tobacco rod portion by being wrapped with tipping paper together with the tobacco rod portion, the electric heating device comprising a hollow portion defined to form a heating chamber inside into which the non-combustion heated tobacco stick can be inserted. a hollow tube heater, the hollow tube heater having a compression tube section for compressing the tobacco rod section from the outer periphery when the non-combustion heat-not-burn tobacco stick is inserted, and a heating wall section formed by at least a part of the compression tube section for heating the tobacco rod section from the outer periphery, the tobacco filler is wrapped in the cigarette paper with the tobacco shreds randomly oriented, the cross-sectional area of the tobacco rod section is relatively larger than the internal cross-sectional area of the compression tube section, and the tobacco rod section inserted into the compression tube section is compressed by the inner wall surface of the compression tube section, a part of the outer surface of the tipping paper is covered with a lip release material, and the lip release material-disposed area of the outer surface of the tipping paper covered with the lip release material is defined as an area located at least closer to the insertion opening of the heating chamber than the heating wall section when the tip of the tobacco rod section is inserted to a specified position in the heating chamber.

Here, the cross-sectional area of the tobacco rod portion may be specified so that the cross-sectional area after insertion into the compression tube portion is 60% or more and 99% or less of the cross-sectional area before insertion.

The compression tube may also include a pair of opposing clamping walls extending along the axial direction of the compression tube, and the tobacco rod inserted into the compression tube may be compressed by the inner wall surfaces of the clamping walls.

The inner wall surfaces of the pair of clamping walls may be arranged parallel to each other.

The diameter of the tobacco rod portion may be specified to be greater than or equal to 105% and less than or equal to 200% of the distance between the inner wall surfaces of the pair of clamping wall portions.

In addition, the non-combustion heated tobacco product may be configured such that when the non-combustion heated tobacco stick is inserted to a specified position in the heating chamber, the entire tobacco rod portion and a portion of the mouthpiece portion are compressed by the inner wall surface of the compression tube portion.

The cross-sectional area of the mouthpiece portion may also be specified so that the cross-sectional area after insertion into the compression tube portion is 60% or more and 99% or less of the area before insertion.

The hollow tube may further include an insertion tube portion located on the insertion opening side, and the internal cross-sectional area of the insertion tube portion may be relatively larger than the cross-sectional area of the tobacco rod portion.

The present invention can also be specified as a non-combustion heated tobacco stick used with an electric heating device. That is, the present invention is a non-combustion heated tobacco stick used with an electric heating device, which is inserted into a hollow tube heater that is designed to form a heating chamber for the electric heating device inside and is heated from the outer periphery, and includes a tobacco rod portion having a tobacco filler containing tobacco shreds and a cigarette paper that wraps the tobacco filler, and a mouthpiece portion that is coaxially connected to the tobacco rod portion by being wrapped with tipping paper together with the tobacco rod portion, the tobacco filler is wrapped with the cigarette paper in a state in which the tobacco shreds are randomly oriented, the cross-sectional area of the tobacco rod portion is relatively larger than the inner cross-sectional area of the compression tube portion of the hollow tube heater that has a heating wall portion for heating the tobacco rod portion from the outer periphery, and the tobacco rod portion inserted into the compression tube portion is compressed by the inner wall surface of the compression tube portion. A portion of the outer surface of the tipping paper is covered with a lip release material, and the lip release material-disposed area of the outer surface of the tipping paper that is covered with the lip release material is defined as an area that is located at least closer to the insertion opening of the heating chamber than the heating wall portion when the tip of the tobacco rod portion is inserted to a specified position in the heating chamber.

In addition, the means for solving the problems in this invention can be adopted in combination as much as possible.

The present invention provides technology for ensuring the delivery amount of flavor components in non-combustion heated tobacco sticks when inhaled and suppressing variations in air resistance.

FIG. 1 is a perspective view of a tobacco stick according to an embodiment. FIG. 2 is a diagram illustrating the internal structure of the tobacco stick according to the embodiment. FIG. 3 is an external perspective view of the electrically heated device according to the embodiment. FIG. 4 is a diagram illustrating the internal structure of the electrically heated device according to the embodiment. FIG. 5 is a perspective view of a hollow tube heater according to an embodiment. FIG. 6 is a schematic diagram of a vertical cross section of a hollow tube heater according to an embodiment. FIG. 7 is an exploded view of a hollow tube heater according to an embodiment. FIG. 8 is a perspective view of a chamber tube according to the embodiment. FIG. 9 is a view of the heating chamber in the hollow tube heater according to the embodiment, viewed from the insertion port side. FIG. 10 is a perspective view of a plug member according to the embodiment. FIG. 11 is a cross-sectional view taken along line AA of the hollow tube heater shown in FIG. FIG. 12 is a cross-sectional view taken along line BB of the hollow tube heater shown in FIG. FIG. 13 is a diagram illustrating a state in which a tobacco stick has been inserted to a specified position in the heating chamber of the electrically heated device according to the embodiment.

Here, an embodiment of the non-combustion heated tobacco product and non-combustion heated tobacco stick according to the present invention will be described with reference to the drawings. Note that the dimensions, materials, shapes, relative arrangements, etc. of the components described in this embodiment are merely examples.

<Embodiment>
Fig. 1 is a perspective view of a non-combustion heated tobacco stick (hereinafter simply referred to as "tobacco stick") 100 according to an embodiment. Fig. 2 is a diagram illustrating the internal structure of the tobacco stick 100 according to an embodiment. The tobacco stick 100 has a structure suitable for use with an electrically heated device 1 described below, and a non-combustion heated tobacco product is composed of the electrically heated device 1 and the tobacco stick 100. When the non-combustion heated tobacco product is used, the tobacco stick 100 can be freely inserted into and removed from the heating chamber 60 through an insertion port (indicated by reference symbol 5A in Figs. 4, 6, etc.) of the electrically heated device 1.

The tobacco stick 100 according to the embodiment has a substantially cylindrical rod shape. In the example shown in Figs. 1 and 2, the tobacco stick 100 includes a tobacco rod portion 110, a mouthpiece portion 120, and tipping paper 130 that connects them together. The mouthpiece portion 120 is connected coaxially to the tobacco rod portion 110 by being wrapped around the tipping paper 130 together with the tobacco rod portion 110.

Reference numeral 101 denotes the mouth end of the tobacco stick 100 (mouthpiece portion 120). Reference numeral 102 denotes the tip of the tobacco stick 100 opposite the mouth end 101. The tobacco rod 110 is disposed on the tip 102 side of the tobacco stick 100. In the example shown in Figures 1 and 2, the tobacco stick 100 has a substantially constant diameter over the entire longitudinal length from the mouth end 101 along the tip 102.

[Tip paper]
The material of the tipping paper 130 is not particularly limited, and may be paper made of general plant fiber (pulp), a sheet using polymer-based (polypropylene, polyethylene, nylon, etc.) chemical fiber, a polymer-based sheet, a metal foil such as aluminum foil, or a composite material combining these. For example, the tipping paper 130 may be made of a composite material in which a metal foil is bonded to a paper base material. The tipping paper 130 here refers to a sheet-like material that connects multiple segments in the tobacco stick 100, for example, connecting the tobacco rod portion 110 and the mouthpiece portion 120.

The basis weight of the tipping paper 130 is not particularly limited, but is usually 32 gsm or more and 40 gsm or less, preferably 33 gsm or more and 39 gsm or less, and more preferably 34 gsm or more and 38 gsm or less. The air permeability of the tipping paper 130 is not particularly limited, but is usually 0 Coresta units or more and 30,000 Coresta units or less, and preferably more than 0 Coresta units and 10,000 Coresta units or less. The air permeability is a value measured in accordance with ISO 2965:2009, and is expressed as the flow rate (cm ³ ) of gas passing through an area of 1 cm ² per minute when the differential pressure between both sides of the paper is 1 kPa. 1 Coresta unit (1 Coresta unit, 1 C.U.) is cm ³ /(min·cm ² ) under 1 kPa.

In addition to the pulp, the chip paper 130 may contain fillers, such as metal carbonates such as calcium carbonate and magnesium carbonate, metal oxides such as titanium oxide, titanium dioxide and aluminum oxide, metal sulfates such as barium sulfate and calcium sulfate, metal sulfides such as zinc sulfide, quartz, kaolin, talc, diatomaceous earth, gypsum, etc., and it is particularly preferable that the chip paper 130 contains calcium carbonate from the viewpoint of improving whiteness and opacity and increasing the heating rate. Furthermore, these fillers may be used alone or in combination of two or more types.

In addition to the above pulp and fillers, the chip paper 130 may contain various auxiliary agents, for example, a water resistance improver to improve the strength. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more.

A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the tipping paper 15. There are no particular limitations on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred.

The method for producing the tip paper 130 is not particularly limited, and general methods can be applied. For example, in the case of an embodiment in which pulp is the main component, a method can be used in which the texture is adjusted and made uniform during the papermaking process using a Fourdrinier papermaking machine, a cylinder papermaking machine, a combined cylinder and short-circuit papermaking machine, etc. using pulp. If necessary, a wet strength agent can be added to impart water resistance to the wrapping paper, or a sizing agent can be added to adjust the printing condition of the wrapping paper.

<Tobacco rod part>
The configuration of the tobacco rod portion 110 is not particularly limited and may be of a general form. For example, a tobacco filler 111 wrapped in cigarette paper 112 may be used.

[Tobacco filling]
In this embodiment, the tobacco filler 111 is configured to include tobacco shreds. The material of the tobacco shreds contained in the tobacco filler 111 is not particularly limited, and known materials such as lamina and ribs can be used. In addition, the tobacco filler 111 may be a shredded product obtained by crushing dried tobacco leaves to an average particle size of 20 μm or more and 200 μm or less to obtain tobacco shreds, homogenizing the shredded product, and processing the shredded product into a sheet (hereinafter, simply referred to as a homogenized sheet). In addition, the tobacco filler 111 may be a so-called strand type product in which a homogenized sheet having a length approximately equal to the longitudinal direction of the tobacco rod is shredded approximately horizontally to the longitudinal direction of the tobacco rod and filled into the tobacco rod. In addition, the width of the tobacco shreds is preferably 0.5 mm or more and 2.0 mm or less when filling the tobacco rod portion 110. In addition, the content of the dried tobacco leaves contained in the tobacco rod portion 110 is not particularly limited, but may be 200 mg/rod portion or more and 800 mg/rod portion or less, and preferably 250 mg/rod portion or more and 600 mg/rod portion or less. This range is particularly suitable for the tobacco rod portion 110 having a circumference of 22 mm and a length of 20 mm.

Various types of tobacco can be used for the tobacco leaves used in the preparation of the tobacco shreds and homogenized sheets. Examples include flue-cured tobacco, burley, orient, native tobacco, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures of these. The above varieties can be appropriately blended to achieve the desired flavor. Details of the tobacco varieties are disclosed in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009." There are several conventional methods for producing the homogenized sheet, that is, the method for grinding tobacco leaves and processing them into a homogenized sheet. The first method is to produce a paper-making sheet using a papermaking process. The second method is to mix a suitable solvent such as water with the ground tobacco leaves to homogenize them, and then cast the homogenized material thinly on a metal plate or metal plate belt and dry it to produce a cast sheet. The third method is to mix a suitable solvent such as water with the ground tobacco leaves to homogenize them, and extrude them into a sheet to produce a rolled sheet. The types of the homogenizing sheets are disclosed in detail in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."

The moisture content of the tobacco filling 111 can be 10% by weight or more and 15% by weight or less, and is preferably 11% by weight or more and 13% by weight or less, based on the total amount of the tobacco filling 111. Such a moisture content suppresses the occurrence of rolling stains and improves the suitability for rolling during the manufacture of the tobacco rod portion 110. There are no particular restrictions on the size of the tobacco shreds contained in the tobacco filling 111 or the preparation method thereof. For example, dried tobacco leaves shredded to a width of 0.5 mm or more and 2.0 mm or less may be used. In addition, when using a crushed homogenized sheet, dried tobacco leaves may be crushed to an average particle size of about 20 μm to 200 μm, homogenized, processed into a sheet, and then shredded to a width of 0.5 mm or more and 2.0 mm or less may be used.

The tobacco filling 111 may contain an aerosol base material that generates aerosol smoke. The type of the aerosol base material is not particularly limited, and various extracts from natural products and/or their constituents can be selected depending on the application. Examples of the aerosol base material include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof. The content of the aerosol base material in the tobacco filling 111 is not particularly limited, and from the viewpoint of generating sufficient aerosol and imparting a good flavor, it is usually 5% by weight or more, preferably 10% by weight or more, and usually 50% by weight or less, preferably 15% by weight or more and 25% by weight or less, based on the total amount of the tobacco filling.

The tobacco filling 111 may contain a flavoring. The type of flavoring is not particularly limited, and from the viewpoint of imparting a good flavor, the following flavorings may be used: 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, konjac oil, coriander oil, cuminaldehyde, 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, gene absolute, gentian root infusion, geraniol, geranyl acetate, grape juice, guaiacol, guava extract, gamma-heptalactone, gamma-hexalactone, hexanoic acid, cis-3-hexen-1-ol, hexyl acetate, hexyl alcohol, phenylhexyl acetate, honey, 4-hydroxy-3-pentenoic acid lactone, 4-hydroxy-4-(3-hydroxy-1-butenyl)-3,5,5-trimethyl-2-cyclohexen-1-ol On, 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, immortelle absolute, beta-ionone, isoamyl acetate, isoamyl butyrate, isoamyl phenylacetate, isobutyl acetate, isobutyl phenylacetate, jasmine absolute, cola nut tincture, labdanum oil, lemon terpeneless oil, licorice extract, linalool, linalyl acetate, lovage root oil, maltol, maple syrup, menthol, menthone, L-menthyl acetate, paramethoxybenzaldehyde, methyl-2-pyrrolyl ketone, anthraquinone, Methyl ranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methylvaleric acid, mimosa absolute, honeysuckle, myristic acid, nerol, nerolidol, gamma-nonalactone, nutmeg oil, delta-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, omega-pentadecalactone, peppermint oil, petitgrain paraguay oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract, propenyl guaethol, acetic acid Propyl, 3-propylidenephthalide, prune juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax absolute, marigold oil, tea distillate, alpha-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 Examples of the fragrance include ethyl-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), and ethyl-2-(p-menthane-3-carboxamide)acetate (WS-5), and menthol is particularly preferred. These fragrances may be used alone or in combination of two or more.

The content of flavoring in the tobacco filling 111 is not particularly limited, and from the viewpoint of imparting a good flavor, it is usually 10,000 ppm or more, preferably 20,000 ppm or more, more preferably 25,000 ppm or more, and is usually 70,000 ppm or less, preferably 50,000 ppm or less, more preferably 40,000 ppm or less, and even more preferably 33,000 ppm or less.

[Scroll paper]
The cigarette paper 112 is a sheet material for wrapping the tobacco filler 111, and its configuration is not particularly limited, and a general one can be used. For example, the base paper used for the cigarette paper 112 can be cellulose fiber paper, and more specifically, hemp or wood or a mixture thereof can be used. The basis weight of the base paper in the cigarette paper 112 is, for example, usually 20 gsm or more, and preferably 25 gsm or more. On the other hand, the basis weight is usually 65 gsm or less, preferably 50 gsm or less, and more preferably 45 gsm or less. The thickness of the cigarette paper 112 having the above characteristics is not particularly limited, and from the viewpoints of rigidity, breathability, and ease of adjustment during papermaking, it is usually 10 μm or more, preferably 20 μm or more, more preferably 30 μm or more, and also usually 100 μm or less, preferably 75 μm or less, and more preferably 50 μm or less.

The shape of the cigarette paper 112 for the tobacco rod portion 110 (tobacco filler 111) can be, for example, square or rectangular. When used as cigarette paper 112 for wrapping the tobacco filler 111 (for producing the tobacco rod portion 11), the length of one side can be approximately 12 mm to 70 mm, the length of the other side can be 15 mm to 28 mm, the preferred length of the other side can be 22 mm to 24 mm, and the more preferred length can be approximately 23 mm.

In addition to the above pulp, the wrapping paper 112 may contain a filler. The content of the filler may be 10% by weight or more and less than 60% by weight, and preferably 15% by weight or more and 45% by weight or less, based on the total weight of the wrapping paper 112. In the wrapping paper 112, in the preferred range of basis weight (25 gsm or more and 45 gsm or less), the filler is preferably 15% by weight or more and 45% by weight or less. Furthermore, when the basis weight is 25 gsm or more and 35 gsm or less, the filler is preferably 15% by weight or more and 45% by weight or less, and when the basis weight is more than 35 gsm and 45 gsm or less, the filler is preferably 25% by weight or more and 45% by weight or less. As the filler, calcium carbonate, titanium dioxide, kaolin, etc. can be used, but it is preferable to use calcium carbonate from the viewpoint of enhancing flavor and whiteness, etc.

Various auxiliary agents other than the base paper and fillers may be added to the wrapping paper 112. For example, a water resistance improver may be added to improve water resistance. The water resistance improver includes a wet paper strength agent (WS agent) and a sizing agent. Examples of wet paper strength agents include urea formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), highly saponified polyvinyl alcohol with a saponification degree of 90% or more, etc. A paper strength agent may be added as an auxiliary agent, such as polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, polyvinyl alcohol, etc. In particular, it is known that the use of a very small amount of oxidized starch improves breathability (for example, JP 2017-218699 A). In addition, the wrapping paper 112 may be appropriately coated.

A coating agent may be added to at least one of the two surfaces of the wrapping paper 112, the front and back surfaces. There are no particular limitations on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred. Examples of the coating agent include alginic acid and its salts (e.g., sodium salts), polysaccharides such as pectin, cellulose derivatives such as ethyl cellulose, methyl cellulose, carboxymethyl cellulose, and nitrocellulose, starch and its derivatives (e.g., ether derivatives such as carboxymethyl starch, hydroxyalkyl starch, and cationic starch, and ester derivatives such as starch acetate, starch phosphate, and starch octenyl succinate).

In the tobacco rod portion 110 configured as described above, the tobacco filler 111 is wrapped in the cigarette paper 112 with the tobacco shreds randomly oriented. The tobacco shreds being randomly oriented means that the tobacco shreds are not wrapped in the cigarette paper 112 with the tobacco shreds oriented in a specific direction. The axial length of the tobacco rod portion 110 can be changed appropriately according to the size of the product, but is usually 10 mm or more, preferably 12 mm or more, more preferably 15 mm or more, and even more preferably 18 mm or more, and is usually 70 mm or less, preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 25 mm or less.

<Mouthpiece section>
The configuration of the tobacco stick 100 is not particularly limited and may be a general embodiment. In the embodiment shown in Fig. 1, the mouthpiece portion 120 includes two segments (divisions), namely, a cooling segment 121 and a filter segment 122. The cooling segment 121 is disposed so as to be sandwiched between the tobacco rod portion 110 and the filter segment 122 in a state of abutting against them. In another embodiment, a gap may be formed between the tobacco rod portion 110 and the cooling segment 121, and between the tobacco rod portion 110 and the filter segment 122. The mouthpiece portion 120 may also be formed from a single segment.

[Cooling segment]
The configuration of the cooling segment 121 is not particularly limited as long as it has the function of cooling the mainstream smoke of the tobacco, and an example of the cooling segment 121 is a cardboard processed into a cylindrical shape. In this case, the inside of the cylinder is hollow, and the vapor containing the aerosol-generating base material and the tobacco flavor component is cooled by contacting with the air in the cavity.

The cooling segment 121 is provided with a vent hole 103, which is an opening for taking in air from the outside. The number of vent holes 103 in the cooling segment 121 is not particularly limited. In this embodiment, a plurality of vent holes 103 are arranged at regular intervals in the circumferential direction of the cooling segment 121. In addition, the group of vent holes 103 arranged in the circumferential direction of the cooling segment 121 may be formed in multiple stages along the axial direction of the cooling segment 121. By providing the vent hole 103 in the cooling segment 121, when the tobacco stick 100 is sucked, low-temperature air flows into the cooling segment 121 from the outside, and the temperature of the volatile components and air flowing in from the tobacco rod portion 110 can be lowered. In addition, the vapor containing the aerosol-generating base material and the tobacco flavor components is condensed by being cooled by the low-temperature air introduced into the cooling segment 121 through the vent hole 103. This promotes the generation of aerosols and allows the size of the aerosol particles to be controlled.

When the cooling segment 121 is filled with a sheet or the like for cooling the volatile components and air flowing from the tobacco rod portion 110 into the cooling segment 121, the total surface area of the cooling segment 121 is not particularly limited, and may be, for example, 300 ^mm2 /mm or more and 1000 ^mm2 /mm or less. This surface area is the surface area per mm of the length (mm) in the air passage direction of the cooling segment 121. The total surface area of the cooling segment 121 is preferably 400 ^mm2 /mm or more, more preferably 450 ^mm2 /mm or more, while it is preferably 600 ^mm2 /mm or less, and more preferably 550 ^mm2 /mm or less.
It is desirable for the cooling segment 121 to have a large total surface area due to its internal structure. Thus, in a preferred embodiment, the cooling segment 121 may be formed by a thin sheet of material that is wrinkled to form channels, and then pleated, gathered, and folded. The more folds or pleats within a given volume of the element, the greater the total surface area of the cooling segment 121. The thickness of the constituent material of the cooling segment 121 is not particularly limited and may be, for example, 5 μm to 500 μm, and may be, for example, 10 μm to 250 μm.

It is preferable that the ventilation hole 103 in the cooling segment 121 is located at a position 4 mm or more away from the boundary between the cooling segment 121 and the filter segment 122. This not only improves the cooling capacity of the cooling segment 121, but also suppresses the retention of components generated by heating in the cooling segment 121, thereby improving the delivery amount of the components. It is preferable that the tipping paper 130 has an opening directly above the ventilation hole 103 provided in the cooling segment 121 (a position where they overlap vertically). The openings of the cooling segment 121 are preferably provided so that the air inflow rate from the openings when inhaling at 17.5 ml/sec with an automatic smoking machine (the volumetric rate of air inflowing from the openings when the volumetric rate of air inhaled from the mouth end is taken as 100 volumetric%) is 10 to 90 volume%, preferably 50 to 80 volume%, more preferably 55 to 75 volume%. For example, the number of openings V per opening group is selected from the range of 5 to 50, the diameter of the openings V is selected from the range of 0.1 to 0.5 mm, and a combination of these selections can be used to achieve this. The above air inflow rate can be measured using an automatic smoking machine (for example, a single-cigarette automatic smoking machine manufactured by Borgwaldt) by a method conforming to ISO9512. The axial length of the cooling segment 121 is not particularly limited, but is usually 10 mm or more, preferably 15 mm or more, and usually 40 mm or less, preferably 35 mm or less, and more preferably 30 mm or less. It is particularly preferable that the axial length of the cooling segment 121 is 20 mm. By setting the axial length of the cooling segment 121 to be equal to or greater than the above-mentioned lower limit, a sufficient cooling effect can be ensured to obtain a good flavor. Furthermore, by setting the axial length of the cooling segment 121 to be equal to or less than the above-mentioned upper limit, loss caused by adhesion of steam and aerosols generated during use to the inner wall of the cooling segment 121 can be suppressed.

[Filter Segment]
The configuration of the filter segment 122 is not particularly limited as long as it has a function as a general filter, and may be, for example, a cylindrical cellulose acetate tow. The single yarn fineness and total fineness of the cellulose acetate tow are not particularly limited, but when the filter segment 122 has a circumference of 22 mm, the single yarn fineness is preferably 5 to 20 g/9000 m and the total fineness is preferably 12000 to 30000 g/9000 m. The cross-sectional shape of the fiber of the cellulose acetate tow may be a Y cross section or an R cross section. When the filter segment 122 is formed by filling the cellulose acetate tow, 5 to 10% by weight of triacetin may be added to the cellulose acetate tow to improve the filter hardness. In the example shown in FIG. 2, the filter segment 122 is composed of a single segment, but the filter segment 122 may be composed of multiple segments. When the filter segment 122 is composed of a plurality of segments, for example, a hollow segment such as a center hole is arranged on the upstream side (the tobacco rod portion 110 side), and an acetate filter with a mouth cross section filled with cellulose acetate tow is arranged as a segment on the downstream side (the mouth end 101 side). This embodiment can prevent unnecessary loss of the generated aerosol and improve the appearance of the tobacco stick 100. In addition, from the viewpoint of changes in the sensation of smoking and the comfort of holding in the mouth, an acetate filter may be arranged on the upstream side (the tobacco rod portion 110 side), and a hollow segment such as a center hole may be arranged on the downstream side (the mouth end 101 side). In addition, the filter segment 122 may be arranged in an embodiment using other alternative filter materials, such as a paper filter filled with sheet-like pulp paper, instead of an acetate filter.

Typical functions of the filter in the filter segment 122 include, for example, adjusting the amount of air mixed in when inhaling aerosols, reducing flavor, and reducing nicotine and tar, but it is not necessary for the filter to have all of these functions. In addition, in electrically heated tobacco products, which tend to produce fewer components and have a lower tobacco filler filling rate compared to cigarette products, another important function is to suppress the filtering function while preventing the tobacco filler from falling out.

The cross-sectional shape of the filter segment 122 is substantially circular, and the diameter of the circle can be changed appropriately according to the size of the product, but is usually 4.0 mm or more and 9.0 mm or less, preferably 4.5 mm or more and 8.5 mm or less, and more preferably 5.0 mm or more and 8.0 mm or less. If the cross section is not circular, the above diameter is applied to a circle having the same area as the area of the cross section. The circumference of the filter segment 122 can be changed appropriately according to the size of the product, but is usually 14.0 mm or more and 27.0 mm or less, preferably 15.0 mm or more and 26.0 mm or less, and more preferably 16.0 mm or more and 25.0 mm or less. The axial length of the filter segment 122 can be changed appropriately according to the size of the product, but is usually 15 mm or more and 35 mm or less, preferably 17.5 mm or more and 32.5 mm or less, and more preferably 20.0 mm or more and 30.0 mm or less. The shape and dimensions of the filter medium can be appropriately adjusted so that the shape and dimensions of the filter segment 122 fall within the above ranges.

The airflow resistance per 120 mm of the axial length of the filter segment 122 is not particularly limited, but is usually ₄₀ mmH2O or more and ₃₀₀ mmH2O or less, preferably 70 _mmH2O or more and 280 mmH2O _or less, and more preferably 90 _mmH2O or more and ₂₆₀ mmH2O or less. The airflow resistance is measured according to the ISO standard method (ISO6565), for example, using a filter airflow resistance measuring device manufactured by Cerulean Co., Ltd. The airflow resistance of the filter segment 122 refers to the air pressure difference between the first end face and the second end face when air is flowed at a predetermined air flow rate (17.5 cc/min) from one end face (first end face) to the other end face (second end face) in a state in which air does not pass through the side face of the filter segment 122. The unit of airflow resistance can generally be expressed in _mmH2O . It is known that the relationship between the airflow resistance of filter segment 122 and the length of filter segment 122 is proportional within the length range normally used (lengths of 5 mm to 200 mm), and if the length of filter segment 122 is doubled, the airflow resistance also doubles.

The density of the filter medium in the filter segment 122 is not particularly limited, but is usually 0.10 g/cm ³ or more and 0.25 g/cm ³ or less, preferably 0.11 g/cm ³ or more and 0.24 g/cm ³ or less, and more preferably 0.12 g/cm ³ or more and 0.23 g/cm ³ or less. From the viewpoint of improving strength and structural rigidity, the filter segment 122 may be provided with a winding paper (filter plug winding paper) for winding the filter medium or the like. The mode of the winding paper is not particularly limited, and may include one or more rows of seams containing adhesive. The adhesive may include a hot melt adhesive, and the hot melt adhesive may further include polyvinyl alcohol. In addition, when the filter segment 122 is composed of two or more segments, it is preferable that the winding paper is wound around these two or more segments. The material of the wrapper in the filter segment 122 is not particularly limited, and any known material may be used, and may contain a filler such as calcium carbonate.

The thickness of the roll is not particularly limited, and is usually 20 μm or more and 140 μm or less, preferably 30 μm or more and 130 μm or less, and more preferably 30 μm or more and 120 μm or less. The basis weight of the roll is not particularly limited, and is usually 20 gsm or more and 100 gsm or less, preferably 22 gsm or more and 95 gsm or less, and more preferably 23 gsm or more and 90 gsm or less. In addition, the roll may be coated or uncoated, but it is preferable to coat it with a desired material from the viewpoint of imparting functions other than strength and structural rigidity.

When the filter segment 122 includes a center hole segment and a filter medium, the center hole segment and the filter medium may be connected, for example, by an outer plug wrapper (outer winding paper). The outer plug wrapper may be, for example, a cylindrical paper. The tobacco rod portion 110, the cooling segment 121, and the connected center hole segment and filter medium may be connected, for example, by a mouthpiece lining paper. These connections can be made, for example, by applying a glue such as a vinyl acetate glue to the inner surface of the mouthpiece lining paper, and then inserting and winding the tobacco rod portion 110, the cooling segment 121, and the connected center hole segment and filter medium. These may be connected in multiple separate instances using multiple lining papers.

The filter medium of the filter segment 122 may include a crushable additive release container (e.g., a capsule) that includes a crushable shell such as gelatin. The form of the capsule (also called an "additive release container" in the art) is not particularly limited, and may be a known form, for example, a crushable additive release container that includes a crushable shell such as gelatin. The form of the capsule is not particularly limited, and may be, for example, a frangible capsule, and its shape is preferably a sphere. The additive contained in the capsule may include any of the additives described above, and in particular, flavoring agents and activated carbon. In addition, one or more materials that help filter smoke may be added as an additive. The form of the additive is not particularly limited, but is usually a liquid or solid. The use of capsules that include additives is well known in the art. Frangible capsules and methods for producing them are well known in the art.

The flavoring agent may be, for example, menthol, spearmint, peppermint, fenugreek, or clove, medium chain triglycerides (MCT), etc. The flavoring agent may be menthol, or menthol, etc., or combinations thereof.
A flavoring may be added to the filter material of the filter segment 122. The addition of the flavoring to the filter material increases the amount of flavoring delivered during use, compared to the conventional technology of adding a flavoring to the tobacco filler constituting the tobacco rod portion 110. The degree of increase in the amount of flavoring delivered is further increased depending on the position of the opening provided in the cooling segment 121. There is no particular limitation on the method of adding the flavoring to the filter material, and it is sufficient to add the flavoring so that it is dispersed approximately uniformly in the filter material to which the flavoring is to be added. The amount of flavoring added may be 10 to 100 volume % of the filter material. As a method of addition, the flavoring may be added to the filter material before the filter segment is constructed, or may be added after the filter segment is constructed. The type of flavoring is not particularly limited, but the same flavoring as that contained in the tobacco filler 111 described above may be used.

The filter segment 122 includes a filter medium, and activated carbon may be added to at least a part of the filter medium. The amount of activated carbon added to the filter medium may be 15.0 m ² /cm 2 or more and 80.0 m 2 /cm ² or ^less in one tobacco stick, as a value of the specific surface area of activated carbon × the weight of activated carbon / the cross-sectional area of the filter medium in the direction perpendicular to the airflow direction. For convenience, the above "specific surface area of activated carbon × the ^weight of activated carbon / the cross-sectional area of the filter medium in the direction perpendicular to the airflow direction" may be expressed as "the surface area of activated carbon per unit cross-sectional area". This surface area of activated carbon per unit cross-sectional area can be calculated based on the specific surface area of activated carbon added to the filter medium of one tobacco stick, the weight of the added activated carbon, and the cross-sectional area of the filter medium. Incidentally, activated carbon may not be uniformly dispersed in the filter medium to which it is added, and it is not required that the above range be satisfied in all cross sections (cross sections perpendicular to the air flow direction) of the filter medium.

The surface area of the activated carbon per unit cross-sectional area is more preferably 17.0 ^{m 2} /cm ² or more, and even more preferably 35.0 ^{m 2} /cm ² or more. On the other hand, it is more preferably 77.0 ^{m 2} /cm ² or less, and even more preferably 73.0 ^{m 2} /cm ² or less. The surface area of the activated carbon per unit cross-sectional area can be adjusted, for example, by adjusting the specific surface area of the activated carbon and its added amount, and the cross-sectional area of the filter medium in the direction perpendicular to the air flow direction. The calculation of the surface area of the activated carbon per unit cross-sectional area is calculated based on the filter medium to which the activated carbon is added. When the filter segment 122 is composed of multiple filter mediums, the cross-sectional area and length of only the filter medium to which the activated carbon is added are used as the basis.

Examples of activated carbon include those made from wood, bamboo, coconut shells, walnut shells, and coal. Activated carbon can have a BET specific surface area of 1100 m ² /g or more and 1600 m ² /g or less, preferably 1200 m ² /g or more and 1500 m ² /g or less, and more preferably 1250 m ² /g or more and 1380 m ² /g or less. The BET specific surface area can be determined by a nitrogen gas adsorption method (BET multipoint method). Activated carbon can have a pore volume of 400 μL/g or more and 800 μL/g or less, more preferably 500 μL/g or more and 750 μL/g or less, and more preferably 600 μL/g or more and 700 μL/g or less. Pore volume can be calculated from the maximum adsorption amount obtained by using nitrogen gas adsorption method.The amount of activated carbon added per unit length of the filter medium in the direction of airflow is preferably 5mg/cm or more and 50mg/cm or less, more preferably 8mg/cm or more and 40mg/cm or less, and even more preferably 10mg/cm or more and 35mg/cm or less.By making the specific surface area of activated carbon and the amount of activated carbon added within the above range, the surface area of activated carbon per unit cross-sectional area can be adjusted to a desired one.

The activated carbon particles preferably have a cumulative 10% by volume particle diameter (particle diameter D10) of 250 μm or more and 1200 μm or less. The activated carbon particles preferably have a cumulative 50% by volume particle diameter (particle diameter D50) of 350 μm or more and 1500 μm or less. The particle diameters D10 and D50 can be measured by a laser diffraction scattering method. An example of an apparatus suitable for this measurement is the laser diffraction/scattering type particle size distribution measuring apparatus "LA-950" manufactured by Horiba, Ltd. The powder is poured into the cell of this apparatus together with pure water, and the particle diameter is detected based on the light scattering information of the particles.
The measurement conditions using the above measuring device are as follows.
Measurement mode: Manual flow-mode cell Measurement dispersion medium: Ion-exchanged water Dispersion method: Measured after 1 minute of ultrasonic irradiation Refractive index: 1.92-0.00i (sample refractive index) / 1.33-0.00i (dispersion medium refractive index)
Number of measurements: Measure twice using different samples

In addition, there are no particular limitations on the method of adding activated carbon to the filter medium of the filter segment 122, and it is sufficient that the activated carbon is added so that it is dispersed approximately uniformly in the filter medium to which it is to be added.

In addition, the tobacco stick 100 configured as described above may have a part of the outer surface of the tipping paper 130 covered with a lip release material. The lip release material refers to a material configured to assist in the contact between the lips and the tipping paper 130 being easily separated without substantial adhesion when the user holds the mouthpiece portion 120 of the tobacco stick 100 in the mouth. The lip release material may contain, for example, ethyl cellulose, methyl cellulose, etc. For example, the outer surface of the tipping paper 130 may be coated with the lip release material by applying an ethyl cellulose-based or methyl cellulose-based ink to the outer surface of the tipping paper 130. The lip release material may also contain nitrocellulose.

In this embodiment, the lip release material of the tipping paper 130 is disposed at least in a predetermined mouthpiece region that comes into contact with the lips of a user when the user holds the mouthpiece portion 120 in his/her mouth. More specifically, the lip release material-disposed region R1 (see FIG. 1 ) of the outer surface of the tipping paper 130 that is covered with the lip release material is defined as the region located between the mouthpiece end 101 and the air hole 103 of the mouthpiece portion 120.

The airflow resistance in the longitudinal direction of each tobacco stick 100 configured as described above is not particularly limited, but from the viewpoint of ease of smoking, it is usually 8 mmH ₂ O or more, preferably 10 mmH ₂ O or more, more preferably 12 mmH ₂ O or more, and usually 100 mmH ₂ O or less, preferably 80 mmH ₂ O or less, more preferably 60 mmH ₂ O or less. The airflow resistance is measured according to the ISO standard method (ISO6565:2015), for example, using a filter airflow resistance meter manufactured by Cerulean Co., Ltd. The airflow resistance refers to the air pressure difference between the first end face and the second end face when air is flowed at a predetermined air flow rate (17.5 cc/min) from one end face (first end face) to the other end face (second end face) in a state in which air does not pass through the side face of the tobacco stick 100. The unit is generally expressed in mmH ₂ O. It is known that the relationship between the airflow resistance and the tobacco stick 100 is proportional within the normally used length range (lengths of 5 mm to 200 mm), and if the length of the tobacco stick 100 is doubled, the airflow resistance also doubles.

The rod-shaped tobacco stick 100 preferably has a columnar shape that satisfies the requirement that the aspect ratio, defined as follows, be 1 or greater.
Aspect ratio = h/w
w is the width of the tip 102 of the tobacco stick 100, h is the length in the axial direction, and it is preferable that h≧w. The cross-sectional shape of the tobacco stick 100 is not particularly limited, and may be polygonal, rounded polygonal, circular, or elliptical. The width w of the tobacco stick 100 is the diameter when the cross-sectional shape of the tobacco stick 100 is circular, the major axis when the cross-sectional shape is elliptical, and the diameter of the circumscribed circle or the major axis of the circumscribed ellipse when the cross-sectional shape is polygonal or rounded polygonal. The length h of the tobacco stick 100 in the axial direction is not particularly limited, and is, for example, usually 40 mm or more, preferably 45 mm or more, and more preferably 50 mm or more. Also, it is usually 100 mm or less, preferably 90 mm or less, and more preferably 80 mm or less. The width w of the tip 102 of the tobacco stick 100 is not particularly limited, and is, for example, usually 5 mm or more, and preferably 5.5 mm or more. Also, it is usually 10 mm or less, preferably 9 mm or less, and more preferably 8 mm or less. The ratio of the lengths of the cooling segment 121 and the filter segment 122 to the length of the tobacco stick 100 (cooling segment:filter segment) is not particularly limited, but from the viewpoint of the delivery amount of flavor and an appropriate aerosol temperature, it is usually 0.60-1.40:0.60-1.40, preferably 0.80-1.20:0.80-1.20, more preferably 0.85-1.15:0.85-1.15, even more preferably 0.90-1.10:0.90-1.10, and particularly preferably 0.95-1.05:0.95-1.05. By setting the ratio of the lengths of the cooling segment 121 and the filter segment 122 within the above range, a good balance is achieved between the cooling effect, the effect of suppressing losses due to adhesion of the generated steam and aerosol to the inner wall of the cooling segment 121, and the function of adjusting the air volume and flavor of the filter, thereby achieving a good flavor and flavor intensity.

<Electrically heated device>
Next, an electrically heated device 1 used together with the tobacco stick 100 will be described. The electrically heated device 1 is an inhalation device for inhaling the tobacco stick 100, and constitutes a non-combustion heated tobacco product by being combined with the tobacco stick 100. Fig. 3 is an external perspective view of the electrically heated device 1 according to an embodiment. The electrically heated device 1 includes, for example, an operation button (not shown) that can be switched between operation and non-operation by being operated by a user, and when activated, heats the tobacco filler 111 of the tobacco stick 100 without burning it, thereby releasing flavor components from the tobacco filler 111.

The electrically heated device 1 has a housing 11 for accommodating and protecting various internal components of the device 1. In FIG. 3, reference numeral 12 denotes a top panel portion of the housing 11, reference numeral 13 denotes a bottom panel portion of the housing 11, and reference numeral 14 denotes a side panel portion of the housing 11. However, in this specification, references to the up, down, left, and right directions of the electrically heated device 1 merely refer to the relative positional relationship of each element constituting the electrically heated device 1. In addition, the material forming the housing 11 is not particularly limited, and may be made of a plastic material (e.g., glass-filled nylon formed by injection molding) or a metal material such as aluminum. In addition, the shape, size, etc. of the housing 11 of the electrically heated device 1 are not particularly limited.

A sliding opening/closing lid 15 is attached to the top panel portion 12 of the electrically heated device 1. The opening/closing lid 15 can be slid by the user to open and close an insertion opening (indicated by reference symbol 5A in Figs. 4, 6, etc.) that opens into the top panel portion 12. The insertion opening of the electrically heated device 1 is formed as a circular opening, and is configured to allow the tobacco stick 100 to be freely inserted and removed. In addition, an indicator 17 such as an LED is provided on the housing 11 to inform the user of the operating state of the electrically heated device 1.

Next, the internal structure housed inside the housing 11 of the electrically heated device 1 will be described. Figure 4 is a diagram illustrating the internal structure of the electrically heated device 1 according to an embodiment. In Figure 4, some of the components housed inside the housing 11 are omitted. As shown in Figure 4, the heater unit 20, control unit 30, power source 40, etc. are housed inside the housing 11. The positions of each element housed inside the housing 11, the range they occupy within the housing, etc. are not particularly limited and can be changed as appropriate.

The heater unit 20 is a unit having an electrically heated hollow tube heater 21 for heating the tobacco rod portion 110 in the tobacco stick 100 during operation. The power source 40 is a power source for supplying operating power to the hollow tube heater 21, the indicator 17, etc., and is electrically connected to them via electrical wiring. The power source 40 can be configured to include, for example, a lithium ion battery, a nickel battery, an alkaline battery, etc. The control unit 30 is a computer having a CPU, memory, etc., and controls the operating state of the entire electrically heated device 1. The control unit 30 may be, for example, a microcontroller having a CPU, memory, input/output circuits, timer circuits, etc. implemented on an IC chip. When the electrically heated device 1 is in operation, the control unit 30 supplies power from the power source 40 to the hollow tube heater 21, and performs heating control to heat the tobacco rod portion 110 in the tobacco stick 100 using the hollow tube heater 21.

The heater unit 20 includes a hollow tube heater 21 having a hollow tube shape defined so as to form a heating chamber inside into which a tobacco stick 100 can be inserted, as well as a thermal insulator 22 that covers at least a portion of the outer periphery of the hollow tube heater 21. The thermal insulator 22 contributes to reducing the heat generated by the operation of the hollow tube heater 21 that is transferred to the outside of the electrically heated device 1.

Figure 5 is a perspective view of a hollow tube heater 21 according to an embodiment. Figure 6 is a schematic diagram of a longitudinal section of a hollow tube heater 21 according to an embodiment. Figure 7 is an exploded view of a hollow tube heater 21 according to an embodiment. As shown in Figures 5 to 7, the hollow tube heater 21 in the heater unit 20 is composed of an insertion tube portion 5, a chamber tube 6, a plug member 7, etc. The symbol CL in Figure 6 is the central axis of the hollow tube heater 21. In the following, a cross section along the central axis CL of the hollow tube heater 21 will be described as a "longitudinal cross section", and a cross section perpendicular to the central axis CL will be described as a "transverse cross section".

The insertion tube portion 5 of the hollow tube heater 21 is a sleeve member having a hollow cylindrical shape, and the open end formed at its upper end is formed as the insertion port 5A. The insertion port 5A is an opening for freely inserting the tobacco stick 100 into the hollow tube heater 21 (inside the heating chamber) so that it can be freely removed.

Figure 8 is a perspective view of the chamber tube 6 according to the embodiment. The chamber tube 6 is a bottomed, hollow, tubular member with an upper end 6A formed as an open end, and a hollow heating chamber 60 is formed inside. Figure 9 is a view of the heating chamber 60 in the hollow tube heater 21 according to the embodiment, viewed from the insertion port 5A side.

The upper end 6A of the chamber tube 6 is connected to the lower end 5B of the insertion tube portion 5, thereby forming an integral structure of the insertion tube portion 5 and the chamber tube 6. A bottom wall 64 is formed at the lower end of the chamber tube 6, and an opening 64A is formed in the center of the plane of the bottom wall 64.

The chamber pipe 6 includes a connecting tube portion 61 located at the upper end 6A, a narrowing tube portion 62 located below the connecting tube portion 61, and a compression tube portion 63 located below the narrowing tube portion 62. The upper end 6A of the connecting tube portion 61 is provided with an annular flange extending radially outward of the connecting tube portion 61, and the annular flange is joined to the end face at the lower end 5B of the insertion tube portion 5. The connecting tube portion 61 of the chamber pipe 6 has a roughly hollow cylindrical shape, and for example, its inner diameter is equal to the inner diameter of the lower end 5B of the insertion tube portion 5.

As shown in FIG. 8 and other figures, the compression tube portion 63 in the chamber pipe 6 is formed as a hollow cylinder having a cross section that is approximately oval (elliptical). The upper end of the narrowing tube portion 62 in the chamber pipe 6 that is connected to the connecting tube portion 61 has a hollow cylindrical shape, and the lower end that is connected to the compression tube portion 63 has a generally oval (elliptical) cylindrical shape. As described above, the narrowing tube portion 62 in the chamber pipe 6 in this embodiment has a cross-sectional shape that gradually changes along the axial direction of the narrowing tube portion 62. More specifically, the narrowing tube portion 62 in the chamber pipe 6 has a pair of narrowing walls 62A, 62A that are gradually narrowed toward the lower end side of the narrowing tube portion 62 at positions facing each other across the central axis of the chamber pipe 6, and the cross-sectional shape of the narrowing tube portion 62 is continuously changed along the axial direction by the pair of narrowing walls 62A, 62A.

Next, the plug member 7 in the hollow tube heater 21 will be described. As shown in Figures 5 and 6, the plug member 7 is a member that is attached to the bottom wall 64 of the chamber tube 6 (compression tube portion 63). Figure 10 is a perspective view of the plug member 7 according to the embodiment. The plug member 7 includes a main body portion 71 that is positioned on the heating chamber 60 side so as to follow the inner surface of the bottom wall 64 when attached to the bottom wall 64 of the chamber tube 6 (compression tube portion 63), a protrusion portion 72 that protrudes from the lower surface 71A side of the main body portion 71, and a set of pedestals 73 that protrude upward from the upper surface 71B side of the main body portion 71. The main body portion 71 has a size that can be attached inside the compression tube portion 63. The protrusion portion 72 of the plug member 7 has a stepped cylindrical shape, and the diameter of its base end portion 721 is slightly smaller than the opening 64A of the bottom wall 64, and is configured to be able to pass through the opening 64A. When the plug member 7 is attached to the bottom wall 64 of the compression cylinder portion 63 , the protrusion 72 protrudes to the outside of the heating chamber 60 through the opening 64 A of the bottom wall 64 .

A pair of pedestal portions 73 in the plug member 7 are arranged at intervals in the cross-sectional direction of the heating chamber 60, and a gap SP1 is formed between them. The upper surface of each pedestal portion 73 is formed as a positioning bottom surface 731 that is positioned by abutting the tip 102 of the tobacco rod portion 110 when the tobacco stick 100 is inserted into the hollow tube heater 21 (heating chamber 60) from the insertion port 5A. The positioning bottom surface 731 of each pedestal portion 73 is flat and positioned at the same height in the heating chamber 60. The tobacco stick 100 inserted into the heating chamber 60 is inserted to a specified position when the tip 102 of the tobacco rod portion 110 abuts against the positioning bottom surface 731 of each pedestal portion 73. In other words, in the hollow tube heater 21, the position (specified position) of the positioning bottom surface 731 of each pedestal portion 73 corresponds to the innermost position of the heating chamber 60. When the tobacco stick 100 is inserted to the innermost position of the heating chamber 60, the tip 102 of the tobacco rod portion 110 is placed so as to straddle the upper part of the gap SP1 formed between a pair of pedestals 73. When the tobacco stick 10 is inhaled using the electrically heated device 1, air that has flowed into the heating chamber 60 of the hollow tube heater 21 from the insertion port 5A is introduced to the bottom side of the heating chamber 60 through the gap between the inner wall surface of the hollow tube heater 21 and the tobacco stick 10, and is then introduced into the interior of the tobacco rod portion 110 from the tip 102 of the tobacco rod portion 110 through the gap SP1.

As shown in FIG. 6, the chamber tube 6 in this embodiment has a heater region RH formed in at least a part of the compression tube portion 63. The heater region RH of the compression tube portion 63 is a heat generating region for heating at least the tobacco rod portion 110 of the tobacco stick 100 inserted into the heating chamber 60 from the outer periphery, and is provided with a heater element 23 that generates heat when electricity is applied. Note that the heater element 23 is omitted from illustration as appropriate in other drawings except for FIG. 6. The heater element 23 provided in the heater region RH is an element that generates heat when operating power is supplied from the power source 40, and is not particularly limited. The heater region RH of the compression tube portion 63 may be a metal tube such as stainless steel, and a metal thin film heater may be arranged along the outer periphery of the metal tube. The metal thin film heater is a planar heater that uses a metal thin film as a heating element and has flexibility. In addition, in the heater region RH of the compression tube portion 63, a film heater may be arranged along the outer periphery of the metal tube instead of the metal thin film heater. The film heater may have a structure in which, for example, a layer made of an electrically insulating material and a layer made of a heating track, which is an example of a heating element, are stacked. Also, for example, the heater element 23 may have a structure in which a layer made of a heating track is disposed between two layers made of an electrically insulating material. The electrically insulating material may be, for example, polyimide, and the heating track may be, for example, a metal such as stainless steel. Also, the heater region RH of the compression tube portion 63 may contain a ceramic material. Examples of the ceramic material include alumina, aluminum nitride, and silicon nitride ceramics, which may be stacked and sintered.

When the control unit 30 of the electrically heated device 1 controls the heating of the hollow tube heater 21, the heater element installed in the heating wall portion RH of the hollow tube heater 21 is energized by the power supply 40, causing the heating wall portion RH to generate heat, and as a result, the tobacco rod portion 110 of the tobacco stick 100 inserted into the heating chamber 60 can be heated from the outer periphery.

In this embodiment, the heater element 23 is disposed over substantially the entire axial length of the compression tube 63 in the hollow tube heater 21, thereby forming a heating wall RH over the entire length. In the example shown in FIG. 6, the heater element 23 is disposed so as to cover the outer circumferential surface of the compression tube 63 from the upper end of the compression tube 63 in the axial length to a position corresponding to the height of the positioning bottom surface 731 of the pedestal 73, thereby forming a heating wall RH in the region. However, the manner in which the heater element 23 is disposed in the compression tube 63 is not particularly limited. That is, the heating wall RH may be formed over the entire length of the compression tube 63, or may be formed only in a section that is shorter than the range shown in FIG. 6. In addition, the heater element 23 in the compression tube 63 does not have to be disposed on the outer circumferential side of the compression tube 63. For example, the heater element 23 may be embedded in the wall of the compression tube 63, or may be disposed on the inner circumferential side.

Here, Fig. 11 is a diagram showing a cross section (A-A cross section) at position A-A of the hollow tube heater 21 shown in Fig. 6. Fig. 12 is a diagram showing a cross section (B-B cross section) at position B-B of the hollow tube heater 21 shown in Fig. 6. The A-A cross section of the hollow tube heater 21 corresponds to the cross section of the insertion tube portion 5, and the B-B cross section corresponds to the cross section of the compression tube portion 63 in the chamber tube 6.

The compression tube portion 63 of the hollow tube heater 21 is configured to compress at least the tobacco rod portion 110 from the outer periphery when the tobacco stick 100 is inserted into the heating chamber 60. Hereinafter, when the diameter of the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120) is simply referred to, this refers to the diameter in its original form (before compression by the compression tube portion 63), and when the diameter of the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120) after compression by the compression tube portion 63 is intended, this will be clearly stated.

The insertion tube portion 5 of the hollow tube heater 21 has an inner cross-sectional area that is relatively larger than the cross-sectional area of the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120). More specifically, the inner diameter of the insertion tube portion 5 is relatively larger than the diameter of the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120). The reference character L1 shown in the A-A cross section of FIG. 6 indicates the outer shape (contour) in the cross-sectional direction of the tobacco stick 100 when inserted into the insertion tube portion 5 of the hollow tube heater 21. As shown in the figure, a gap is formed between the inner wall surface 50 of the insertion tube portion 5 and the contour L1 of the tobacco stick 100. With this configuration, when the user inserts the tobacco stick 100 from the insertion opening 5A, the tobacco stick 100 can be smoothly inserted into the heating chamber 60. In addition, when the tobacco stick 100 is inserted into the heating chamber 60, the gap between the inner wall surface 50 of the insertion tube portion 5 and the tobacco stick 100 can be formed as an air flow path.

On the other hand, the compression tube 63 of the hollow tube heater 21 has a generally oval (elliptical) cylindrical shape as described above. Therefore, as shown in the B-B cross-sectional view of the inner space in FIG. 6, the inner cross-section of the compression tube 63 is formed as a generally oval (elliptical) shape. The compression tube 63 is formed by a pair of opposing sandwiching walls 631, 631 extending along the axial direction of the compression tube 63, and a pair of arc wall portions 632, 632 connecting the ends of the sandwiching walls 631, 631. Here, the inner wall surfaces 631A, 631A of the pair of sandwiching walls 631, 631 extend along the axial direction of the compression tube 63 and are arranged to face each other in parallel. The inner wall surfaces 632A, 632A of the pair of arc wall portions 632, 632 also extend along the axial direction of the compression tube 63 and are arranged to face each other in parallel.

The distance between the inner wall surfaces 631A, 631A of the pair of clamping walls 631, 631 is referred to as the "clamping wall distance D1." The clamping wall distance D1 is set to a dimension smaller than the diameter of the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120). In the B-B inner space cross-sectional view of FIG. 6, the outer shape (outline) in the cross-sectional direction of the tobacco stick 100 in its original form is indicated by the symbol L2. In this embodiment, the cross-sectional area of the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120) is relatively larger than the inner space cross-sectional area of the compression tube portion 63, and is specified so that the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120) inserted into the compression tube portion 63 is compressed by the inner wall surface of the compression tube portion 63. More specifically, the distance D1 between the clamping wall surfaces of the pair of opposing clamping walls 631, 631 in the compression tube portion 63 is set to a dimension smaller than the diameter of the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120). Therefore, when the tobacco stick 100 is inserted into the compression tube portion 63 of the hollow tube heater 21, the tobacco stick 100 is compressed from the outer periphery by being clamped between the inner wall surfaces 631A, 631A of the pair of clamping walls 631, 631. Note that in this embodiment, when the tobacco stick 100 is inserted into the compression tube portion 63 of the hollow tube heater 21, a gap is formed between the inner wall surfaces 632A, 632A of the pair of arcuate wall portions 632, 632 and the peripheral surface of the tobacco stick 100, but the inner wall surfaces 632A, 632A may be in contact with the peripheral surface of the tobacco stick 100.

The distance D1 between the clamping walls of the compression tube 63 is substantially equal to the minor axis dimension of the cross section of the inner space in the compression tube 63 having a roughly oval (elliptical) shape. The major axis dimension of the cross section of the inner space in the compression tube 63 is not particularly limited. As an example, in this embodiment, the major axis dimension of the cross section of the inner space in the compression tube 63 is equal to the diameter of the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120). However, the major axis dimension of the cross section of the inner space in the compression tube 63 may be set to a smaller dimension than the diameter of the tobacco stick 100 (tobacco rod portion 110, mouthpiece portion 120), or may be set to a larger dimension.

Figure 14 is a diagram illustrating a state in which a tobacco stick 100 has been inserted to a specified position in the heating chamber 60 of the electrically heated device 1 according to the embodiment. As shown in Figure 14, the tobacco stick 100 inserted to a specified position in the heating chamber 60 is positioned with the tip 102 of the tobacco rod portion 110 abutting against the positioning bottom surface 731 of the base portion 73 of the hollow tube heater 21, i.e., the bottom surface of the heating chamber 60. Also, as shown in Figure 14, when the tobacco stick 100 is inserted to a specified position (positioning bottom surface 731) in the heating chamber 60, the position (height) of the ventilation hole 103 in the mouthpiece portion 120 (cooling segment 121) matches the position (height) of the insertion opening 5A.

In addition, the axial length of the compression tube portion 63 in the hollow tube heater 21 from the upper end of the compression tube portion 63 to the positioning bottom surface 731 of the base portion 73 is greater than the length dimension of the tobacco rod portion 110. Therefore, when the tobacco stick 100 is inserted up to a specified position in the heating chamber 60 in the hollow tube heater 21, the entire tobacco rod portion 110 and a part of the mouthpiece portion 120 are inserted into the compression tube portion 63. As a result, the entire tobacco rod portion 110 and a part of the mouthpiece portion 120 are sandwiched between the inner wall surfaces 631A, 631A of the pair of sandwiching walls 631, 631, and are compressed from the outer periphery.

When the user turns on the operation button of the electrically heated device 1 in a predetermined manner, the control unit 30 starts supplying power from the power source 40 to the hollow tube heater 21, and heating control is started to heat the tobacco rod portion 110 in the tobacco stick 100. When the heating control is started, the heater element 23 installed in the heating wall portion RH of the compression tube portion 63 in the hollow tube heater 21 is energized, causing the heating wall portion RH to generate heat. This allows the tobacco filler 111 contained in the tobacco rod portion 110 of the tobacco stick 100 to be heated without being burned, and vapor containing an aerosol-generating base material and tobacco flavor components to be generated.

The entire axial area of the compression tube portion 63 of the hollow tube heater 21 according to this embodiment is formed as the heating wall portion RH. Therefore, when the hollow tube heater 21 is in operation, the tobacco rod portion 110 can be heated in a state in which the tobacco rod portion 110 is compressed by the compression tube portion 63 (heating wall portion RH). In this way, by compressing and heating the tobacco rod portion 110 from the outer periphery, the heat generated by the heating wall portion RH (heater element 23) can be efficiently transferred to the tobacco filler 111 of the tobacco rod portion 110. As a result, the tobacco filler 111 of the tobacco rod portion 110 is efficiently heated, thereby increasing the delivery amount of aerosol and flavor components.

Furthermore, the tobacco rod portion 110 in the tobacco stick 100 is wrapped in the cigarette paper 112 with the tobacco filler 111 and the tobacco shreds randomly oriented. Therefore, the tobacco shreds are arranged in a uniformly distributed state in the cross section of the tobacco rod portion 110, and the gaps between the tobacco shreds can be reduced. As a result, even if the tobacco rod portion 110 is compressed from the outer periphery as it is inserted into the compression tube portion 63, it is possible to suppress a large change in the air resistance during inhalation. In other words, the air resistance during inhalation is less likely to vary for each tobacco stick 100, which can contribute to ensuring a stable quality of the aroma and flavor of the tobacco stick 100. In other words, according to the tobacco stick 100 in this embodiment and the non-combustion heated tobacco product including the same, it is possible to ensure the delivery amount of the flavor component of the tobacco stick 100 and suppress the variation in the air resistance.

In addition, the cross-sectional area of the tobacco rod portion 110 in this embodiment is preferably specified so that the cross-sectional area after insertion into the compression tube portion 63 of the electrically heated device 1 is 60% to 99% of the cross-sectional area before insertion, and more preferably is specified to be 80% to 98%. In addition, the diameter of the tobacco rod portion 110 is preferably specified to be 105% to 200% of the distance between the inner wall surfaces 631A, 631A of the pair of clamping walls 631, 631, and more preferably is specified to be 109% to 140%. According to these, when the hollow tube heater 21 in the electrically heated device 1 is operated, the heat of the heating wall portion RH (heater element 23) can be more efficiently transmitted to the tobacco filler 111 of the tobacco rod portion 110, and the tobacco filler 111 can be heated more efficiently. Furthermore, if the cross-sectional area of the tobacco rod portion 110 after insertion into the compression tube portion 63 in the electrically heating device 1 is less than 60% of that before insertion, the tobacco rod portion 110 may be excessively compressed when inserted into the compression tube portion 63. As a result, the cigarette paper 112 may be torn when inserted into the compression tube portion 63, or the tobacco rod portion 110 may have difficulty in inhaling due to an excessively large airflow resistance.

In addition, the vapor containing the aerosol-generating substrate and tobacco flavor components generated in the tobacco rod section 110 when the hollow tube heater 21 is activated flows from the tobacco rod section 110 into the cooling segment 121 of the mouthpiece section 120, and is cooled by contact with the air taken into the cavity of the cooling segment 121 through the air vent 103. In this way, the temperature of the components and air flowing in from the tobacco rod section 110 can be lowered. The vapor of the aerosol-generating substrate is then liquefied by being cooled in the cooling segment 121, promoting the generation of aerosol. The aerosol containing the flavor components then passes through the filter segment 122 and is inhaled into the oral cavity from the mouth end 101.

As described above, when the tobacco stick 100 is inserted to a specified position in the heating chamber 60, the entire tobacco rod portion 110 and a part of the mouthpiece portion 120 (cooling segment 121) are configured to be compressed by the inner wall surface (the inner wall surfaces 631A, 631A of the pair of clamping walls 631, 631) of the compression tube portion 63. When the hollow tube heater 21 is operated, not only the tobacco rod portion 110 of the tobacco stick 100 but also the mouthpiece portion 120 (cooling segment 121) are heated in a compressed state by the inner wall surface of the compression tube portion 63, thereby obtaining an effect that steam and aerosol are less likely to adhere to the inner wall of the mouthpiece portion 120 (cooling segment 121). In addition, the cross-sectional area of the mouthpiece portion 120 is preferably specified so that the cross-sectional area after insertion into the compression tube portion 63 is 60% to 99% of the area before insertion, and more preferably 80% to 98%. This makes it possible to obtain the above-mentioned steam and aerosol adhesion suppression effect more significantly. In addition, if the cross-sectional area of the mouthpiece part 120 after insertion into the compression tube part 63 of the electrically heated device 1 is less than 60% of the area before insertion, the mouthpiece part 120 may be excessively compressed when inserted into the compression tube part 63. As a result, the mouthpiece part 120 may be damaged when inserted into the compression tube part 63. On the other hand, if the cross-sectional area of the mouthpiece part 120 after insertion into the compression tube part 63 is more than 99% of the area before insertion, the adhesion between the mouthpiece part 120 and the hollow tube heater 21 may decrease, and the effect of steam and aerosol not easily adhering to the inner wall of the mouthpiece part 120 may not be fully obtained.

Furthermore, when the tobacco stick 100 is inserted into the heating chamber 60 of the hollow tube heater 21 in the electrically heated device 1, it is inserted up to a specified position (positioning bottom surface 731) of the heating chamber 60 while receiving resistance due to contact with a pair of clamping walls 631, 631 of the compression tube portion 63. In other words, in this embodiment, insertion resistance is generated due to contact with the clamping walls 631, 631 before the tip 102 of the tobacco stick 100 abuts against the positioning bottom surface 731 of the heating chamber 60, making it difficult for the user to grasp the moment when the tip 102 of the tobacco stick 100 abuts against the positioning bottom surface 731 of the heating chamber 60 from the change in the insertion resistance of the tobacco stick 100.

In contrast, the tobacco stick 100 is specified such that, when the tip 102 of the tobacco rod portion 110 is inserted up to a specified position (positioning bottom surface 731) in the heating chamber 60, the position (height) of the vent 103 provided in the mouthpiece portion 120 (cooling segment 121) matches the position (height) of the insertion opening 5A of the heating chamber 60. This allows the user to easily visually determine when to stop the insertion operation, based on the relative positions of the position (height) of the vent 103 and the position (height) of the insertion opening 5A when inserting the tobacco stick 100 into the heating chamber 60. In other words, when inserting the tobacco stick 100 into the heating chamber 60, the position of the air vent 103 is used as a landmark, and once it is visually confirmed that the position (height) of the air vent 103 matches the position (height) of the insertion opening 5A, the moment when the tip 102 of the tobacco stick 100 abuts against the positioning bottom surface 731 of the heating chamber 60 can be grasped without relying on a change in the insertion resistance of the tobacco stick 100.

As a result, when inserting the tobacco stick 100 into the hollow tube heater 21 of the electrically heated device 1, the tobacco stick 100 can be accurately inserted to a specified position simply by inserting the tobacco stick 100 until the position of the vent hole 103 in the tobacco stick 100 matches the height of the insertion opening 5A. Furthermore, because the timing at which the tobacco stick 100 is inserted to the specified position can be properly grasped, it is possible to prevent the tobacco stick 100 from being pushed further into the heating chamber 60 from a state in which the tip 102 of the tobacco stick 100 abuts against the positioning bottom surface 731 of the heating chamber 60. This makes it possible to prevent the tobacco stick 100 from buckling midway or being crushed in the axial direction. Furthermore, when inserting the tobacco stick 100 into the heating chamber 60 of the hollow tube heater 21, the user can be prevented from mistaking the insertion resistance caused by contact between the tobacco stick 100 and the clamping walls 631, 631 for the tip 102 of the tobacco stick 100 abutting against the positioning bottom surface 731 of the heating chamber 60, and from stopping the insertion operation of the tobacco stick 100 before the specified position.

In addition, the ventilation hole 103 that introduces external air into the cooling segment 121 of the mouthpiece portion 120 has a greater cooling effect on the vapor of volatile components released from the heated tobacco filler 111 when the tobacco stick 100 is inhaled if it is located upstream of the cooling segment 121 (to the tobacco rod portion 110 side). On the other hand, if the ventilation hole 103 is located within the heating chamber 60 (the area surrounded by the wall surface of the hollow tube heater 21 below the insertion port 5A) when the tobacco stick 100 is inhaled, it becomes difficult to smoothly introduce external air into the mouthpiece portion 120 (cooling segment 121) through the ventilation hole 103 when inhaling. In contrast, the tobacco stick 100 of the present embodiment is configured so that, when the tobacco stick 100 has been completely inserted up to a specified position (positioning bottom surface 731) in the heating chamber 60, the position (height) of the vent 103 in the mouthpiece portion 120 (cooling segment 121) matches the position (height) of the insertion opening 5A of the heating chamber 60, and therefore it is possible to achieve both the cooling effect of the cooling segment 121 during inhalation and the efficiency of taking in outside air through the vent 103. In other words, from the perspective of achieving both the cooling effect of the cooling segment 121 during inhalation and the efficiency of taking in outside air through the vent 103, it is possible to specify an optimal relative relationship between the position of the vent 103 in the tobacco stick 100 and the insertion depth of the heating chamber 60.

Furthermore, in the tobacco stick 100 of this embodiment, the outer surface of the tipping paper 130 is covered with a lip release material in a lip release region R1 (see Figures 1, 14, etc.) located between the mouth end 101 and the air hole 103 of the mouthpiece portion 120. In this embodiment, the lip release material arrangement region R1 in which the lip release material is arranged is defined as a region located at least closer to the insertion port 5A side than the heating wall portion RH of the compression tube portion 63 when the tip 102 of the tobacco rod portion 110 (tobacco stick 100) is inserted to a specified position (positioning bottom surface 731, innermost position) of the heating chamber 60. This makes it possible to prevent the lip release material in the lip release material arrangement region R1 in the tobacco stick 100 from being directly heated by the heating wall portion RH when the heating wall portion RH of the compression tube portion 63 generates heat in association with the operation of the hollow tube heater 21 in the electrically heated device 1. As a result, it is possible to suppress the release of components that may affect the aroma and taste of the tobacco stick 100 from the lip release material. In particular, in this embodiment, the lip release material arrangement region R1 is defined as a region located between the mouth end 101 and the ventilation hole 103 of the mouthpiece portion 120. As described above, the ventilation hole 103 of the mouthpiece portion 120 is defined so as to match the position (height) of the insertion opening 5A of the heating chamber 60 when the tip 102 of the tobacco stick 100 is inserted to a specified position (positioning bottom surface 731, innermost position) of the heating chamber 60. Therefore, by setting the range of the lip release material arrangement region R1 in the tobacco stick 100 as described above, it is possible to position the lip release material arrangement region R1 more reliably on the insertion opening 5A side compared to the heating wall portion RH of the compression tube portion 63 when the tobacco stick 100 is inserted to the innermost position of the heating chamber 60.

Here, an example of a method for quantifying the amount of coating of lip release material on chip paper is described. The instruments used in this quantification method are a rotary evaporator, a thermostatic water bath, a cooling tube, and an absorbance measuring device. First, a sample is prepared by cutting the chip paper coated with the lip release material into small pieces, and the sample is placed in a previously weighed Erlenmeyer flask to weigh the sample (step 1). Next, 100 ml of acetone is added as a reagent to the Erlenmeyer flask, and ultrasonic extraction is performed for 30 minutes (step 2). Next, the extract extracted in step 2 is transferred to a 300 ml eggplant-shaped flask, and the acetone in the extract is evaporated using a rotary evaporator (step 3). In step 3, the eggplant-shaped flask is set so that it is immersed in a thermostatic water bath set at a water temperature of 40°C, and acetone is evaporated in a state where it is set. Next, 25 ml of acetone is added to the eggplant-shaped flask in several batches to dissolve the non-volatile matter remaining in the flask again (step 4). Next, 50 ml of the solution in which the non-volatile matter was dissolved again in step 4 is transferred to another eggplant-shaped flask, and the acetone in the solution is evaporated using an evaporator (step 5). Next, 10 ml of acetone and 10 ml of 10% KOH are added to the eggplant-shaped flask containing the solution from which acetone was evaporated in step 5, and a cooling tube is set in the eggplant-shaped flask, followed by refluxing for 1 hour in a thermostatic water bath at a water temperature of 60°C (step 6). Next, the solution is cooled to room temperature on ice, and then filtered using filter paper (step 7). For the filtration in step 7, 50 ml of the filtrate is placed in a measuring flask, and a mixed solution of acetone and water (acetone:water = 2:1) is used to fill up to the line of the measuring flask. Next, the absorbance of the solution after filtration in step 7 is measured using an absorbance measuring device.

Although the embodiments of the present invention have been described above, each of the configurations and their combinations in the embodiments is merely an example, and the configurations can be appropriately added, omitted, replaced, and otherwise modified within the scope of the gist of the present invention. For example, the specific form of the compression tube portion 63 in the hollow tube heater 21 of the electrically heated device 1 is not particularly limited as long as its cross-sectional area is relatively small compared to the cross-sectional area of the tobacco stick 100. Therefore, in the above embodiment, the compression tube portion 63 is described as including a pair of clamping walls 631, 631 facing each other in parallel along the axial direction, but instead, a form in which the tobacco stick 100 inserted into the compression tube portion 63 is compressed from the outer periphery by clamping the tobacco stick 100 between non-parallel walls may be adopted.

In addition, the compression tube portion 63 in the hollow tube heater 21 may be a cylinder having an inner diameter smaller than the diameter of the tobacco stick 100. In this case, the narrowed tube portion 62 located between the connecting tube portion 61 and the compression tube portion 63 in the chamber tube 6 may have an inner diameter that gradually tapers from the upper end side connected to the connecting tube portion 61 toward the lower end side connected to the compression tube portion 63. In any of the above embodiments, the tobacco stick 100 can be compressed from the outer periphery by the inner wall surface of the compression tube portion 63, and the tobacco stick 100 can be compressed and heated when the hollow tube heater 21 is operated.

1: Electrically heated device 5: Insertion tube portion 6: Chamber tube 11: Housing 20: Heater unit 21: Hollow tube heater 5A: Insertion port 60: Heating chamber 61: Connection tube portion 62: Narrowed tube portion 63: Compression tube portion RH: Heating wall portion 100: Tobacco stick 103: Ventilation hole 110: Tobacco rod portion 120: Mouthpiece portion 121: Cooling segment 122: Filter segment 130: Tip paper 631: Clamping wall portion

Claims (7)

A non-combustion heated tobacco product comprising an electric heating device and a non-combustion heated tobacco stick used with the electric heating device,
The non-combustion heat-not-burn tobacco stick comprises:
a tobacco rod portion having a tobacco filler including tobacco shreds and a cigarette paper for wrapping the tobacco filler;
a mouthpiece portion that is coaxially connected to the tobacco rod portion by being wrapped together with the tobacco rod portion with tipping paper;
Equipped with
The electrically heated device has a hollow tube heater defined to form a heating chamber therein into which the non-combustion heated tobacco stick can be inserted;
The hollow tube heater comprises:
a compression tube portion for compressing a part of a cross section of the tobacco rod portion from an outer circumferential side in association with the insertion of the non-combustion heating tobacco stick;
a heating wall portion formed by at least a part of the compression cylinder portion, for heating the tobacco rod portion from an outer circumferential side;
having
the tobacco filler is wrapped in the cigarette paper in a state in which the tobacco shreds are randomly oriented;
a cross-sectional area of the tobacco rod portion is relatively large compared to an inner cross-sectional area of the compression cylinder portion, and a part of the cross section of the tobacco rod portion inserted into the compression cylinder portion is compressed by an inner wall surface of the compression cylinder portion;
A portion of the outer surface of the tipping paper is coated with a lip release material;
a lip release material-disposed area of the outer surface of the tipping paper, the lip release material-disposed area being covered with the lip release material, is defined as an area located at least closer to an insertion opening of the heating chamber than the heating wall when the tip of the tobacco rod portion is inserted to a specified position in the heating chamber;
The compression cylinder portion includes a pair of opposing sandwiching walls extending along an axial direction of the compression cylinder portion, and a wall portion having a gap between the tobacco rod portion and the wall portion, through which air can flow;
The tobacco rod portion inserted into the compression tube portion is compressed by the inner wall surface of the clamping wall portion, and gaps through which the air flows are formed at a plurality of locations on a transverse surface of the compression tube portion,
the air introduced to the bottom side of the heating chamber through the air flow gap is introduced into the inside of the tobacco rod portion from the tip of the tobacco rod portion;
Non-combustion heated tobacco products. The non-combustion heated tobacco product according to claim 1, wherein the cross-sectional area of the tobacco rod portion after insertion into the compression tube portion is specified to be 60% or more and 99% or less of the cross-sectional area before insertion. The non-combustion heated tobacco product according to claim 1 or 2 , wherein inner wall surfaces of the pair of opposing sandwiching walls are arranged in parallel to face each other. The non-combustion heated tobacco product according to claim 3 , wherein a diameter of the tobacco rod portion is set to a dimension that is 105% or more and 200% or less of a distance between the inner wall surfaces of the pair of opposing sandwiching walls. 5. A non-combustion heated tobacco product according to claim 1, wherein when the non-combustion heated tobacco stick is inserted to a specified position in the heating chamber, the entire tobacco rod portion and a part of the mouthpiece portion are compressed by the inner wall surface of the compression tube portion. The non-combustion heated tobacco product according to claim 5 , wherein the cross-sectional area of the mouthpiece portion after insertion into the compression cylinder portion is specified to be 60% or more and 99% or less of that before insertion. The hollow tube heater further includes an insertion tube portion located on the insertion port side,
an inner cross-sectional area of the insertion tube portion is relatively larger than a cross-sectional area of the tobacco rod portion;
A non-combustion heated tobacco product according to any one of claims 1 to 6 .

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