Flavor-generating article and smoking system

Abstract

This flavor-generating article comprises a flavor source and an upstream part disposed upstream of the flavor source. The ventilation resistance of the upstream part is 1 mm H2O to 150 mm H2O. The ratio of the ventilation resistance of the flavor-generating article to the ventilation resistance of the upstream part is 2 to 15.

Description

Flavor-generating article and smoking system

[0001] The present invention relates to flavor generating articles and smoking systems.

[0002] Conventionally, flavor inhalers for inhaling flavors and the like without burning any material have been known. The flavor inhalers have, for example, a chamber for accommodating a flavor-generating article and a heater for heating the flavor-generating article accommodated in the chamber (see, for example, Patent Document 1).

[0003] International Publication No. 2020 / 084775

[0004] In a flavor inhaler such as that disclosed in Patent Document 1, when preheating is complete and a user begins smoking, a large amount of water, which has a relatively low boiling point among the components contained in the flavor-generating article, tends to evaporate and remain in the flavor-generating article, which can result in a large amount of water vapor being contained in the first puff, which can cause an unpleasant feeling to the user.

[0005] One object of the present invention is to reduce the water vapor delivered to the user on the first puff of a flavor generating article.

[0006] According to a first aspect, there is provided a flavor-generating article. The flavor-generating article includes a flavor source and an upstream portion disposed upstream of the flavor source. The upstream portion has an airflow resistance of 1 mmH. ２ O or more 150mmH ２ The ratio of the airflow resistance of the flavor-generating article to the airflow resistance of the upstream portion is 2 or more and 15 or less.

[0007] According to the first aspect, the upstream portion increases the airflow resistance of the entire flavor-generating article, thereby reducing the amount of water vapor supplied to the user in the first puff. Furthermore, because the upstream portion increases the airflow resistance of the entire flavor-generating article, the need to adjust the airflow resistance of portions other than the upstream portion of the flavor-generating article is reduced, thereby improving the design flexibility of the flavor-generating article. By having the airflow resistance of the upstream portion within the above numerical range and the ratio within the above numerical range, the upstream portion can increase the airflow resistance of the entire flavor-generating article while preventing the airflow resistance of the entire flavor-generating article from becoming too large.

[0008] The airflow resistance of the upstream portion is 5 mmH ２ O or more 50mmH ２ It may be O or less.

[0009] In this case, it is possible to provide the user with a comfortable inhalation resistance while reducing the amount of water vapor supplied to the user in the first puff.

[0010] The flavor-generating article has an airflow resistance of 30 mmH ２ O or more 150mmH ２ It may be O or less.

[0011] In this case, a comfortable resistance to attraction can be provided to the user.

[0012] The upstream portion may comprise a heat deformable material.

[0013] In this case, since the heat-deformable material in the upstream portion can be deformed by heating, the airflow resistance in the upstream portion can be changed by the deformation of the heat-deformable material in response to heating of the flavor-generating article, thereby allowing the airflow resistance in the upstream portion to be changed to a desired airflow resistance as the smoking session progresses.

[0014] The heat deformable material may be configured to melt from a solid to a liquid upon application of heat.

[0015] In this case, the airflow resistance of the upstream portion can be reduced to a desired level as the smoking session progresses. Thus, the flavor-generating article has a high airflow resistance at the beginning of the smoking session, for example, in the first puff, that is high enough to reduce the amount of water vapor supplied to the user, and can reduce the airflow resistance in the latter half of the smoking session to provide the user with a comfortable inhalation resistance.

[0016] The heat deformable material may include at least one selected from the group consisting of a structure including fibers, a structure including a gel composition, a structure including wax, a capsule, and a film.

[0017] In this case, the heat-deformable material can be deformed by changing its phase from solid to liquid when heated, or by changing the viscosity of the liquid.

[0018] The heat-deformable material may be deformed by being heated to a temperature of 40°C or higher and 180°C or lower.

[0019] In this case, heating the flavor source can deform the heat-deformable material contained in the upstream portion located upstream of the flavor source. Furthermore, in this case, if the upstream portion is a filter such as an acetate filter, a paper filter, or a nonwoven fabric filter, the heat-deformable material can be deformed without the upstream portion being denatured by heat. The flavor source can be heated to, for example, 200°C or higher and 400°C or lower.

[0020] In a cross section perpendicular to the direction in which the flavor source and the upstream portion are adjacent to each other, the area occupied by the heat deformable material with respect to the area of ​​the upstream portion may be 2% or more and 55% or less.

[0021] If the area is less than 2%, it may be difficult to sufficiently increase the airflow resistance using the heat deformable material. If the area is more than 55%, the airflow resistance may be too high. Therefore, if the area is within the above numerical range, the heat deformable material can provide the desired airflow resistance in the upstream portion.

[0022] In a cross section perpendicular to the direction in which the flavor source and the upstream portion are adjacent to each other, the heat deformable material may be disposed at approximately the center of the upstream portion.

[0023] In this case, air can be supplied evenly to the downstream flavor source compared to when the heat-deformable material is biased toward the upstream portion, allowing the vapor or aerosol generated in the flavor source to be delivered efficiently.

[0024] A downstream portion may be provided located downstream of the flavor source.

[0025] In this case, downstream, the vapor or aerosol generated by the flavor source can be cooled and filtered.

[0026] The downstream portion may include a filter plug.

[0027] In this case, the vapor or aerosol generated by the flavor source can be cooled and filtered in the filter plug.

[0028] According to a second aspect, there is provided a smoking system including the above-described flavor-generating article and a flavor inhaler including a heating unit for heating the flavor-generating article. The flavor inhaler has a control unit for controlling the heating unit. The control unit controls the heating unit to heat the flavor-generating article so that the amount of water vapor contained in a first puff is 3 mg / puff or more and 5 mg / puff or less.

[0029] According to the second aspect, the flavor-generating article can be heated so as to reduce the amount of water vapor contained in the first puff of the flavor-generating article.

[0030] The airflow resistance of the upstream portion of the fifth puff is at least 2.5 mmH higher than the airflow resistance of the upstream portion of the first puff. ２ O It may be small.

[0031] In this case, the airflow resistance in the upstream portion can be reduced as the smoking session progresses, so that the smoking system can reduce the amount of water vapor contained in the vapor or aerosol at the beginning of the smoking session, and reduce the airflow resistance from the fifth puff onwards in the smoking session, thereby providing the user with a comfortable inhalation resistance.

[0032] It is a figure which shows the smoking system based on this embodiment. It is an exploded perspective view of the flavor generating article. It is a schematic cross-sectional view of the flavor generating article. It is an exploded perspective view of the flavor generating article based on another embodiment.

[0033] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings described below, identical or corresponding components are designated by the same reference numerals, and redundant description will be omitted. FIG. 1 is a diagram showing a smoking system 100 according to this embodiment. As shown in FIG. 1, the smoking system 100 includes a flavor-generating article 110 having a flavor source and a flavor inhaler 120 that heats the flavor-generating article 110. Air inhaled by a user is guided into the user's oral cavity in the order of, for example, airflow 100A, airflow 100C, and airflow 100B. That is, the smoking system 100 shown in FIG. 1 has a so-called counterflow type air flow path.

[0034] The flavor generating article 110 is a substrate containing a flavor source such as tobacco capable of generating a smokable flavor, and has, for example, a columnar shape extending along the longitudinal direction. The flavor generating article 110 may be, for example, a tobacco stick. The flavor generating article 110 may have a cylindrical shape, a columnar shape with a polygonal cross section, or a flat shape. In this specification, the term "longitudinal direction" refers to the length direction of the flavor generating article 110, or the direction in which the tip plug 112 and the flavor generating section 220, which will be described later, are adjacent to each other.

[0035] The flavor inhaler 120 includes a battery 10, a control unit 20, and a heating unit 30. The battery 10 stores power used by the flavor inhaler 120. For example, the battery 10 is a lithium-ion battery. The battery 10 may be rechargeable by an external power source.

[0036] The control unit 20 is configured with a CPU, a memory, etc., and controls the operation of the flavor inhaler 120 including the heating unit 30. For example, the control unit 20 starts heating the flavor-generating article 110 in response to a user operation on an input device such as a push button or a slide switch (not shown), and stops heating the flavor-generating article 110 after a certain time has elapsed. The control unit 20 may stop heating the flavor-generating article 110 even before a certain time has elapsed since the start of heating the flavor-generating article 110 when the number of puffing actions by the user exceeds a certain value. For example, the puffing action is detected by a sensor (not shown).

[0037] Alternatively, the control unit 20 may start heating the flavor-generating article 110 in response to the start of a puffing action, and may end heating the flavor-generating article 110 in response to the end of the puffing action. The control unit 20 may end heating the flavor-generating article 110 when a certain time has elapsed since the start of the puffing action, even before the end of the puffing action. In the embodiment, the control unit 20 is disposed between the battery 10 and the heating unit 30, and suppresses heat transfer from the heating unit 30 to the battery 10.

[0038] The heating unit 30 may be configured to accommodate the flavor generating article 110. The heating unit 30 also includes a heating source 40. The heating source 40 is a heating element that generates heat, i.e., its temperature increases, due to power from the battery 10. In the illustrated example, the heating source 40 is a heater disposed in the flavor inhaler 120. The heater may include an electric heating wire. The heater is configured to heat the flavor generating article 110 accommodated in the heating unit 30 from the outside of the flavor generating article 110. In this manner, the flavor inhaler 120 is preferably a so-called externally heated flavor inhaler. Note that, instead of the heating source 40, the flavor generating article 110 may have a susceptor therein. In this case, the susceptor may be inductively heated by an induction coil disposed in the flavor inhaler 120. Alternatively, the flavor inhaler 120 may have a microwave radiation source instead of the heating source 40. In this case, a microwave absorber such as water or glycerin contained in the flavor generating article 110 can be heated by microwaves from the microwave radiation source. By configuring the flavor generating article 110 in this manner, the flavor generating article 110 can be heated without the need to insert a heater such as a pin-type heater into the flavor generating article 110, and it is possible to prevent a decrease in heating efficiency due to a part of the flavor generating article 110 adhering to such a heater. The flavor inhaler 120 may have a pin- or blade-type heater that is inserted into the flavor generating article 110.

[0039] FIG. 2 is an exploded perspective view of the flavor generating article 110. FIG. 3 is a schematic cross-sectional view of the flavor generating article 110. Specifically, FIG. 3(a) is a schematic side cross-sectional view of the flavor generating article 110. FIG. 3(b) is a cross-sectional view taken along the line b-b in FIG. 3(a). As shown in FIGS. 2 and 3(a), the flavor generating article 110 includes a flavor source 221 that generates a flavor, and a tip plug 112 (corresponding to an example of an upstream portion) disposed upstream of the flavor source 221. More specifically, in the illustrated example, the flavor generating article 110 includes, in order from the tip side (i.e., the side opposite the mouthpiece), the tip plug 112, a flavor generating portion 220, a hollow tube portion 132, a hollow filter portion 240, and a filter plug 250. These five components are connected using an outer plug wrap 280, an outer plug wrap 260, and tipping paper 270.

[0040] The airflow resistance in the longitudinal direction of each flavor-generating article 110 is not particularly limited, but from the viewpoint of ease of smoking, it is usually 8 mmH ２ O or more, 10 mmH ２ It is preferable that the pressure is 12 mmH or more. ２ It is more preferable that the pressure is 0 or more, and usually 150 mmH ２ O or less, 100 mmH ２ It is preferable that the pressure is 80 mmH or less. ２ It is more preferable that the pressure is 60 mmH or less. ２ More preferably, the flavor generating article 110 has an airflow resistance of 30 mmH or less. ２ O or more 150mmH ２ It is preferable that the resistance is 0 or less. In this case, a comfortable inhalation resistance can be provided to the user. The airflow resistance is measured in accordance with the ISO standard method (ISO6565:2015) using, for example, a filter airflow resistance measuring device 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 / sec) from one end face (first end face) to the other end face (second end face) in a state where air does not pass through the side faces of the flavor-generating article 110. The unit is generally mmH. ２It is represented by O. It is known that the relationship between the airflow resistance and the length of a non-combustible heat-not-burn tobacco is proportional within the length range typically used (5 mm to 200 mm), and if the length is doubled, the airflow resistance of the non-combustible heat-not-burn tobacco doubles.

[0041] The rod-shaped flavor generating article 110 preferably has a columnar shape that satisfies the requirement that the aspect ratio defined as follows be 1 or greater. Aspect ratio = h / w, where w is the width of the bottom surface of the columnar body (in this specification, this is the width of the bottom surface on the flavor generating section 220 side), and h is the height, and it is preferable that h ≥ w. In this specification, the long axis direction is defined as the direction indicated by h. Therefore, even if w ≥ h, the direction indicated by h will be referred to as the long axis direction for convenience. The shape of the bottom surface is not limited and may be a polygon, a rounded polygon, a circle, an ellipse, or the like. The width w is the diameter if the bottom surface is circular, the major axis if the bottom surface is elliptical, or the diameter of the circumscribing circle or the major axis of the circumscribing ellipse if the bottom surface is polygonal or rounded polygonal.

[0042] The length h of the flavor-generating article 110 in the major axis direction is not particularly limited, and is, for example, typically 40 mm or more, preferably 45 mm or more, and more preferably 50 mm or more, and typically 100 mm or less, preferably 90 mm or less, and more preferably 80 mm or less.

[0043] The width w of the bottom surface of the columnar body of flavor-generating article 110 is not particularly limited, and is, for example, typically 5 mm or more, preferably 5.5 mm or more, and typically 10 mm or less, preferably 9 mm or less, and more preferably 8 mm or less.

[0044] The ratio of the length of the hollow tube portion 132 and the filter segment (the total length of the hollow filter portion 240 and the filter plug 250) to the longitudinal length of the flavor-generating article 110 (hollow tube portion 132:filter segment) is not particularly limited, but from the viewpoint of the amount of flavor delivered and an appropriate aerosol temperature, it is usually 0.60 to 1.40:0.60 to 1.40, preferably 0.80 to 1.20:0.80 to 1.20, more preferably 0.85 to 1.15:0.85 to 1.15, even more preferably 0.90 to 1.10:0.90 to 1.10, and particularly preferably 0.95 to 1.05:0.95 to 1.05. By setting the length ratio of the hollow tube portion 132 and the filter segments (hollow filter portion 240 and filter plug 250) within the above range, it is possible to achieve a cooling effect, an effect of suppressing loss of generated steam and aerosol due to adhesion to the inner wall of the hollow tube portion 132, and an effect of providing a good and strong flavor by balancing the filter's air volume and flavor adjustment functions. In particular, if the hollow tube portion 132 is made longer, the aerosol and the like will be promoted to be atomized, resulting in a good flavor, but if it is too long, substances passing through will adhere to the inner wall.

[0045] The flavor generating unit 220 is disposed adjacent to and downstream of the tip plug 112. The flavor generating unit 220 includes a flavor source 221 and a cigarette paper 222 around which the flavor source 221 is wrapped. The flavor generating unit 220 may be configured in any known manner, but typically includes the flavor source 221 wrapped in the cigarette paper 222. The flavor source 221 is wrapped in the cigarette paper 222 so that the flavor source 221 faces inward to form the flavor generating unit 220. The flavor source 221 may include a tobacco filler. The tobacco filler is not particularly limited, and may be a first tobacco filler or a second tobacco filler, as described below. In this specification, dried tobacco products such as tobacco shreds, tobacco sheets, and tobacco granules, as described below, may be simply referred to as "dried tobacco leaf." The flavor generating unit 220 may also include a fitting portion for engaging with a heat source 40 for heating the tobacco product.

[0046] The flavor generating section 220, which is obtained by wrapping the flavor source 221 in the wrapping paper 222, preferably has a columnar shape, and in this case, the aspect ratio, which is expressed as the height in the major axis direction of the flavor generating section 220 to the width of the bottom surface of the flavor generating section 220, is preferably 1 or greater. The shape of the bottom surface is not limited and may be polygonal, rounded polygonal, circular, elliptical, etc. The width of the bottom surface is the diameter if the bottom surface is circular, the major axis if the bottom surface is elliptical, and the diameter of the circumscribing circle or the major axis of the circumscribing ellipse if the bottom surface is polygonal or rounded polygonal.

[0047] The length of the flavor generating section 220 in the longitudinal direction can be changed as appropriate to suit the size of the product, but is usually 10 mm or more, preferably 12 mm or more, and is usually 70 mm or less, preferably 50 mm or less, more preferably 30 mm or less, even more preferably 25 mm or less, and even more preferably 20 mm or less.

[0048] Furthermore, the ratio of the length of the flavor generating section 220 to the overall length in the longitudinal direction of the flavor generating article 110 is not particularly limited, but from the viewpoint of the balance between the delivery amount and the aerosol temperature, it is typically 10% or more, preferably 20% or more, and typically 80% or less, preferably 70% or less, more preferably 60% or less, even more preferably 50% or less, particularly preferably 45% or less, and most preferably 40% or less.

[0049] The content of dried tobacco leaves in the flavor generating section 220 is not particularly limited, but may be 150 mg / rod part or more and 800 mg / rod part or less, and preferably 200 mg / rod part or more and 600 mg / rod part or less.

[0050] First, the first tobacco filler (also simply referred to as the "first filler") will be described. The material of the tobacco shreds contained in the first filler is not particularly limited, and known materials such as lamina or ribs can be used. The tobacco shreds may be produced by grinding dried tobacco leaves to an average particle size of 20 μm or more and 200 μm or less to produce tobacco grounds, homogenizing the grounds, processing them into a sheet, and then shredding the homogenized sheet. The tobacco shreds may also be of the so-called strand type, in which a homogenized sheet having a length approximately equal to the longitudinal direction of the flavor generating section 220 is shredded approximately parallel to the longitudinal direction of the flavor generating section 220 and packed into the cigarette paper 222. The width of the tobacco shreds is preferably 0.5 mm or more and 2.0 mm or less in order to be packed into the cigarette paper 222.

[0051] Various types of tobacco can be used for the tobacco leaves used to prepare the shredded tobacco and homogenized sheets. Examples include flue-cured tobacco, burley, oriental tobacco, native tobacco, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures thereof. Mixtures can be created by appropriately blending the above varieties to achieve the desired flavor. Details of the tobacco varieties are disclosed in the "Encyclopedia of Tobacco," published by the Tobacco Research Center on March 31, 2009. Several conventional methods are known for producing homogenized sheets, i.e., grinding tobacco leaves and processing them into homogenized sheets. The first method is to produce a paper-making sheet using a papermaking process. The second method involves mixing a suitable solvent, such as water, with ground tobacco leaves to homogenize them, then casting a thin layer of the homogenized mixture on a metal plate or metal belt and drying it to produce a cast sheet. The third method involves mixing a suitable solvent, such as water, with ground tobacco leaves to homogenize them, and extruding the mixture into a sheet to produce a rolled sheet. The types of the above-mentioned uniforming sheets are disclosed in detail in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."

[0052] The moisture content of the tobacco filler is, for example, 10% by weight to 15% by weight, and preferably 11% by weight to 13% by weight, based on the total weight of the tobacco filler. This moisture content suppresses the occurrence of stains on the surface of the tobacco and improves the suitability of the flavor generating unit 220 for wrapping during manufacturing. There are no particular restrictions on the size or preparation method of the tobacco shreds contained in the first tobacco filler. For example, dried tobacco leaves shredded to a width of 0.5 mm to 2.0 mm may be used for the first tobacco filler. Furthermore, when using a ground homogenized sheet, dried tobacco leaves may be ground to an average particle size of approximately 20 μm to 200 μm, homogenized, processed into a sheet, and then shredded to a width of 0.5 mm to 2.0 mm may be used for the first tobacco filler.

[0053] The first tobacco filler may contain an aerosol base for generating an aerosol. The type of aerosol base is not particularly limited, and extracts from various natural products and / or their constituent components can be selected depending on the intended use. Examples of aerosol bases include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof.

[0054] The content of the aerosol base material in the first tobacco filler 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, relative to the total amount of the tobacco filler.

[0055] The first tobacco filler may contain a flavoring. The type of the flavoring is not particularly limited, and examples of flavorings that can be used to impart a good flavor include acetanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, balsam of Peru 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-Methionine, methylparaben ... - Citronellol, clary sage extract, cocoa, coffee, konjac oil, coriander oil, cumin aldehyde, davana oil, δ-decalactone, γ-decalactone, decanoic acid, dill herb oil, 3,4-dimethyl-1,2-cyclopentanedione, 4,5-dimethyl-3-hydroxy-2,5-dihydrofuran-2-one, 3,7-dimethyl-6-octenoic acid, 2,3-dimethylpyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl octanoate, ethyl oleate, ethyl palmitate, ethyl phenylacetate, ethyl propionate, ethyl stearate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3,(5 or 6)-dimethylpyrazine, 5-ethyl-3-hydroxy-4-methyl-2(5H)-furanone, 2-ethyl-3-methylpyrazine, eucalyptol, fenugreek absolute, 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, lauryl methylpropional Ingredients: methicone, 4-hydroxy-4-(3-hydroxy-1-butenyl)-3,5,5-trimethyl-2-cyclohexen-1-one, 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, immortelle absolute, 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, robertia jasmine Orris root oil, maltol, maple syrup, menthol, menthone, L-menthyl acetate, para-methoxybenzaldehyde, methyl 2-pyrrolyl ketone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methylvaleric acid, mimosa absolute, honey, myristic acid, nerol, nerolidol, gamma-nonalactone, nutmeg oil, delta-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, omega-pentadeca Calactone, peppermint oil, petitgrain Paraguay oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract, propenylguaethol, propyl acetate, 3-propylidenephthalide, prune juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax absolute, marigold oil, tea distillate, α-terpineol, terpinyl acetate, 5,6,7,8-tetrahydroquinoxaline, 1,5,5,9-tetramethyl-13-oxacyclo(8.3.0.0(4.9))tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tridecanone, triethyl citrate, 4-(2,6,6-trimethyl-1-cyclohexenyl)2-buten-4-one, 2,6,6-trimethyl-2-cyclohexene-1,4-dione, 4-(2,6,6-trimethyl-1,3-cyclo Examples of the fragrance include (hexadienyl)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), with menthol being particularly preferred. These fragrances may be used alone or in combination of two or more.

[0056] The content of the flavoring in the first tobacco filling 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.

[0057] The packing density of the first tobacco packing is not particularly limited, but is usually 250 mg / cm from the viewpoint of ensuring the performance of the flavor-generating article 110 and imparting a good flavor. ３ or more, preferably 300 mg / cm ３ or more, and is usually 400 mg / cm ３ or less, preferably 350 mg / cm ３ The following is the result.

[0058] The second tobacco filler is composed of a tobacco sheet packed into a filler (e.g., cigarette paper 222). The number of tobacco sheets may be one or more. When the second tobacco filler is composed of a single tobacco sheet, for example, a packed state (so-called gathered sheet) in which a tobacco sheet having one side with a length approximately equal to the longitudinal direction of the filler is folded multiple times along folds approximately parallel to the longitudinal direction of the filler is mentioned. Another example of the above-mentioned state is a packed state in which a tobacco sheet having one side with a length approximately equal to the longitudinal direction of the filler is wound around the longitudinal axis of the filler.

[0059] In a case where the second tobacco filler is composed of two or more tobacco sheets, for example, a plurality of tobacco sheets, each having a side length approximately the same as the longitudinal axis of the filler, are packed in a state of being wound around the longitudinal axis of the filler so as to be concentrically arranged. "Concentrically arranged" means that the centers of all the tobacco sheets are located at approximately the same position. The number of tobacco sheets is not particularly limited, but examples include two, three, four, five, six, or seven. The two or more tobacco sheets may all have the same composition or physical properties, or some or all of the tobacco sheets may have different compositions or physical properties. The thickness of each tobacco sheet may be the same or different.

[0060] The second tobacco filler can be produced by preparing a plurality of tobacco sheets of different widths, stacking them so that the width decreases from the bottom to the top, and then passing the stack through a rolling tube to roll and form it. According to this production method, the plurality of tobacco sheets extend in the longitudinal direction and are arranged concentrically around the longitudinal axis. Furthermore, a fitting portion extending in the longitudinal direction may be formed between the longitudinal axis and the innermost tobacco sheet.

[0061] In this manufacturing method, the laminate is preferably prepared so that a non-contact portion is formed between adjacent tobacco sheets after rolling. The presence of non-contact portions (gaps) between multiple tobacco sheets where the tobacco sheets do not contact each other ensures flavor flow paths and enhances the delivery efficiency of flavor components. On the other hand, heat from the heater can be transferred to the outer tobacco sheets through the contact portions of the multiple tobacco sheets, ensuring high heat transfer efficiency. To provide non-contact portions between multiple tobacco sheets where the tobacco sheets do not contact each other, methods include using embossed tobacco sheets, stacking adjacent tobacco sheets without bonding their entire surfaces, bonding adjacent tobacco sheets together in part, or lightly bonding adjacent tobacco sheets together in part or all surfaces so that they can be peeled off after rolling. When preparing a flavor generating portion 220 including cigarette paper 222, the cigarette paper 222 may be placed at the bottom of the laminate. Alternatively, a fitting portion can be formed by placing a cylindrical dummy such as a mandrel on the top of the laminate to form a second tobacco filler and then removing the dummy.

[0062] The packing density of the second tobacco filler is not particularly limited, but is usually 250 mg / cm from the viewpoint of ensuring the performance of the flavor generating article 110 and imparting a good flavor. ３ or more, preferably 300 mg / cm ３ or more, and is usually 400 mg / cm ３ or less, preferably 350 mg / cm ３ The following is the result.

[0063] The tobacco sheet may contain an aerosol base that generates an aerosol when heated. The aerosol base may be an aerosol source such as glycerin, propylene glycol, or a polyol such as 1,3-butanediol. The amount of the aerosol base added is preferably 5% by weight or more and 50% by weight or less, and more preferably 15% by weight or more and 25% by weight or less, based on the dry weight of the tobacco sheet.

[0064] Tobacco sheets can be appropriately manufactured by known methods such as papermaking, slurrying, rolling, etc. Note that the homogenized sheet described in the first tobacco filler can also be used. In the case of papermaking, they can be manufactured by a method including the following steps: 1) Dried tobacco leaves are roughly crushed and extracted with water to separate them into an aqueous extract and a residue. 2) The aqueous extract is dried and concentrated under reduced pressure. 3) Pulp is added to the residue, which is then fiberized in a refiner and then made into paper. 4) A concentrated solution of the aqueous extract is added to the paper-made sheet and dried to obtain a tobacco sheet. In this case, a step of removing some components such as nitrosamines may be added (see JP 2004-510422 A). In the case of the slurry method, they can be manufactured by a method including the following steps: 1) Water, pulp, and a binder are mixed with crushed tobacco leaves. 2) The mixture is thinly spread (cast) and dried. In this case, a step of removing some of the components such as nitrosamines by irradiating a slurry of water, pulp, binder, and crushed tobacco leaves with ultraviolet light or X-rays may be added.

[0065] Alternatively, as described in WO 2014 / 104078, a nonwoven tobacco sheet can be used, which is produced by a method comprising the following steps: 1) mixing powdered tobacco leaves with a binder; 2) sandwiching the mixture between nonwoven fabrics; and 3) forming the layered product into a fixed shape by heat welding to obtain a nonwoven tobacco sheet. The raw tobacco leaves used in each of the above methods can be of the same type as those described for the first filler.

[0066] The composition of the tobacco sheet is not particularly limited, but for example, the content of tobacco raw material (tobacco leaves) is preferably 50% by weight or more and 95% by weight or less relative to the total weight of the tobacco sheet. The tobacco sheet may also contain a binder, and examples of such binders include guar gum, xanthan gum, CMC (carboxymethylcellulose), and CMC-Na (sodium salt of carboxymethylcellulose). The amount of binder is preferably 1% by weight or more and 10% by weight or less relative to the total weight of the tobacco sheet. The tobacco sheet may further contain other additives. Examples of additives include fillers such as pulp. In this embodiment, multiple tobacco sheets are used, and these tobacco sheets may all have the same composition or physical properties, or some or all of the tobacco sheets may have different compositions or physical properties.

[0067] The thickness of each tobacco sheet is not limited, but is preferably 150 μm or more and 1000 μm or less, and more preferably 200 μm or more and 600 μm or less, in view of the balance between heat transfer efficiency and strength. The thickness of each tobacco sheet may be the same or different.

[0068] The flavor generating section 220 may include dried tobacco leaves (dried tobacco leaves) and a flavor-containing material in which a flavor is encapsulated in a polysaccharide gel. The flavor-containing material is a material in which a flavor is encapsulated in a polysaccharide gel. By incorporating the flavor-containing material into the flavor generating section 220, variation in the amount of flavor delivered from puff to puff can be suppressed from the initial stage to the later stage of smoking, allowing for a continuous, satisfactory flavor. The inventors speculate that the reason for this is as follows. First, the flavor generating article 110 is inserted into the flavor inhaler 120 shown in FIG. 1 and preheated for a certain period before smoking begins. If a flavor is directly incorporated into the flavor generating section 220, the flavor volatilizes during preheating, and most of it is delivered in the initial stage of smoking, which is thought to result in an insufficient amount of flavor delivered in the later stage of smoking. In contrast, when a flavor-containing material is blended into the flavor generating section 220, the flavor is coated with a polysaccharide gel, which suppresses the evaporation of the flavor during preheating and gradually releases the flavor during smoking. Therefore, it is presumed that a sufficient amount of flavor can be delivered even in the later stages of smoking.

[0069] The components of the fragrance-containing material will be described below. The type of fragrance is not particularly limited, and examples of fragrances that can be used to impart a good fragrance note include acetanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, balsam of Peru oil, beeswax absolute, benzaldehyde, benzoin resinoid, benzyl alcohol, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, β-carotene, carrot juice, L-carvone, β-caryophyllene, cassia bark oil, cedarwood oil, celery seed oil, chamomile oil, cinnamaldehyde, cinnamic acid, cinnamyl alcohol, cinnamyl cinnamate, citronella oil, DL- Citronellol, clary sage extract, cocoa, coffee, cognac oil, coriander oil, cumin aldehyde, davana oil, delta-decalactone, gamma-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, lauryl methylpropional Ingredients: methicone, 4-hydroxy-4-(3-hydroxy-1-butenyl)-3,5,5-trimethyl-2-cyclohexen-1-one, 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, immortelle absolute, 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, robertia jasmine Orris root oil, maltol, maple syrup, menthol, menthone, L-menthyl acetate, para-methoxybenzaldehyde, methyl 2-pyrrolyl ketone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methylvaleric acid, mimosa absolute, honey, myristic acid, nerol, nerolidol, gamma-nonalactone, nutmeg oil, delta-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, omega-pentadeca Calactone, peppermint oil, petitgrain Paraguay oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract, propenylguaethol, propyl acetate, 3-propylidenephthalide, prune juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax absolute, marigold oil, tea distillate, α-terpineol, terpinyl acetate, 5,6,7,8-tetrahydroquinoxaline, 1,5,5,9-tetramethyl-13-oxacyclo(8.3.0.0(4.9))tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tridecanone, triethyl citrate, 4-(2,6,6-trimethyl-1-cyclohexenyl)2-buten-4-one, 2,6,6-trimethyl-2-cyclohexene-1,4-dione, 4-(2,6,6-trimethyl-1,3-cyclo Examples of the fragrance include (hexadienyl)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), with menthol being particularly preferred. These fragrances may be used alone or in combination of two or more.

[0070] The content of the fragrance in the fragrance-containing material varies depending on the type of fragrance, the type of polysaccharide, etc., but is usually 18% by mass or more, preferably 50% by mass or more, more preferably 60% by mass or more, and is usually 90% by mass or less, preferably 80% by mass or less.

[0071] The type of polysaccharide is not particularly limited, but is preferably a single-component system of carrageenan, agar, gellan gum, tamarind gum, psyllium seed gum, or konjac glucomannan; or a composite system combining two or more components selected from the group consisting of carrageenan, locust bean gum, guar gum, agar, gellan gum, tamarind gum, xanthan gum, tara gum, konjac glucomannan, starch, cassia gum, and psyllium seed gum. These polysaccharides are preferred in that they gel simply by heating to 30°C to 90°C in an aqueous solution, eliminating the need for a gelling agent such as a metal chloride when preparing the flavor-containing material and preventing the generation of undesirable components, such as decomposition products of chlorides, in mainstream smoke during smoking.

[0072] The flavor-containing material may contain an emulsifier used to emulsify the raw materials during its preparation. The type of emulsifier is not particularly limited, and examples include lecithin, glycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, propylene glycol fatty acid ester, sucrose fatty acid ester, etc., with lecithin being preferred. These emulsifiers may be used alone or in combination of two or more.

[0073] The method for preparing the flavor-containing material is not particularly limited, and the material can be prepared by a method similar to a known method. Examples of known methods include those described in WO 2011 / 118040, JP 2013-099349, WO 2012 / 118034, etc. More specifically, the flavor-containing material can be prepared by a method including the following steps (i) and (ii): (i) a step of heating a mixture of polysaccharide and water to typically 30°C to 90°C, preferably 60°C to 90°C, to prepare an aqueous solution of the polysaccharide; and (ii) a step of adding a flavor and, if necessary, an emulsifier to the aqueous solution and kneading the mixture to obtain an emulsion slurry.

[0074] The content of the flavor-containing material in the flavor generating section 220 depends on the content of the flavor in the flavor-containing material, but is usually 1% by mass or more, preferably 5% by mass or more, and usually 20% by mass or less, preferably 10% by mass or less, relative to the dried tobacco leaf. The flavor generating section 220 contains a flavor-containing material such that the content of the flavor contained in the flavor-containing material is usually 1 mg or more, preferably 5 mg or more, more preferably 10 mg or more, and usually 30 mg or less, preferably 20 mg or less. By setting the content of the flavor-containing material in the flavor generating section 220 within the above range, it is possible not only to impart a good flavor note, but also to suppress variation in the amount of flavor delivered from the early to late stages of smoking, and to ensure a sufficient delivery amount in all of the early, middle, and late stages of smoking.

[0075] The manner in which the flavor-containing material is blended into the flavor-generating section 220 is not particularly limited, and the flavor-containing material may be disposed inside and / or outside the cigarette paper 222 that wraps the flavor source 221, the cigarette paper 222 may be impregnated with the flavor-containing material, or the flavor-containing material may be blended into the tobacco filler. When the flavor-containing material is disposed inside and / or outside the cigarette paper 222 that wraps the flavor source 221, the emulsion slurry may be applied to the cigarette paper 222, or the emulsion slurry may be sequentially cast onto a substrate and dried to form a flavor-containing sheet, and the flavor source 221 may be wrapped together with the cigarette paper. The cigarette paper 222 impregnated with the flavor-containing material can be produced by impregnating the cigarette paper 222 with the emulsion slurry and drying it. Furthermore, when a flavor-containing material is incorporated into a tobacco filler, the emulsion slurry may be applied to or impregnated into dried tobacco leaves, or the flavor-containing sheet or its shredded or pulverized form may be mixed with dried tobacco.

[0076] 2 and 3(a), the flavor source 221 may be block-shaped or may be cylindrical, for example. When the flavor source 221 is cylindrical, a gap may be formed inside the flavor source 221, extending in a direction in which the flavor source 221 and the tip plug 112 are adjacent to each other. In this case, the flavor source 221 is located outside the flavor-generating article 110, and the gap is located inside the flavor source 221. Therefore, when the flavor-generating article 110 is heated from the outside in the flavor inhaler 120, the flavor source 221 can be efficiently heated. Furthermore, when using a flavor inhaler 120 that heats the flavor-generating article 110 from the outside, the flavor source 221 is not located inside the flavor-generating article 110, which is a position where heat is not easily transferred and which is unlikely to contribute to the generation of vapor or aerosol. Therefore, the amount of the flavor source 221 can be saved while suppressing a decrease in the amount of vapor or aerosol. The cylindrical flavor source 221 may be formed, for example, by rolling a sheet-like flavor source 221 into a cylindrical shape.

[0077] The configuration of the cigarette paper 222 used in the flavor-generating article 110 is not particularly limited and can be any common configuration. Specifically, for example, the cigarette paper can be primarily made of pulp. Pulp can be wood pulp such as softwood pulp or hardwood pulp, flax pulp, hemp pulp, sisal pulp, esparto, or other pulps commonly used in cigarette papers for tobacco products. The cigarette paper can be obtained by papermaking using one or more of these pulps. These pulps can be used alone or in any combination of multiple types in any ratio. Pulp configurations that can be used include chemical pulp obtained by kraft cooking, acidic, neutral, or alkaline sulfite cooking, soda cooking, etc., ground pulp, chemi-ground pulp, and thermomechanical pulp.

[0078] Using the above pulp, cigarette paper can be produced by adjusting and uniforming the texture during the papermaking process using a Fourdrinier paper machine, a cylinder paper machine, or a combined cylinder / short-cylinder paper machine. If necessary, a wet strength agent can be added to impart water resistance to the cigarette paper, or a sizing agent can be added to adjust the printing quality of the cigarette paper. Furthermore, internal papermaking aids and papermaking additives can be added to the cigarette paper. Internal papermaking aids can include, for example, aluminum sulfate, various anionic, cationic, nonionic, or amphoteric retention aids, drainage aids, and paper strength agents. Papermaking additives can include, for example, dyes, pH adjusters, antifoaming agents, pitch control agents, slime control agents, and the like.

[0079] The basis weight of the base paper for the cigarette paper is, for example, typically 30 gsm or more, preferably 35 gsm or more. Meanwhile, the basis weight is typically 70 gsm or less, preferably 50 gsm or less, and more preferably 45 gsm or less. The thickness of the cigarette paper having the above properties is not particularly limited, and is preferably 40 μm or more from the viewpoints of rigidity, breathability, and ease of adjustment during papermaking, and is typically 100 μm or less, preferably 75 μm or less, and more preferably 60 μm or less. The shape of the cigarette paper for the flavor-generating article 110 may be, for example, square or rectangular. In the case of the cigarette paper 222 for wrapping the flavor source 221 (for producing the flavor-generating section 220), the length of one side of the cigarette paper 222 may be approximately 12 mm to 70 mm, and the length of the other side (the side connected to the one side) may be 15 mm to 28 mm, preferably 22 mm to 24 mm, and more preferably approximately 23 mm.

[0080] When wrapping the flavor source 221 in the wrapping paper 222 in a cylindrical shape, for example, one end of the wrapping paper 222 in the width direction and the other end on the opposite side can be overlapped by about 2 mm and glued together. This gives the wrapping paper 222 a cylindrical paper tube shape, into which the flavor source 221 is filled. The size of the rectangular wrapping paper 222 can be determined depending on the size of the flavor-generating unit 220. In the case of wrapping paper that connects and wraps the flavor-generating unit 220 and other components adjacent to the flavor-generating unit 220, the length of one side can be 20 mm to 60 mm, and the length of the other side (the side connected to the above side) can be 15 mm to 28 mm.

[0081] In addition to the above-mentioned pulp, the cigarette paper may contain a filler. The content of the filler may be from 10% by weight to less than 60% by weight, and preferably from 15% by weight to 45% by weight, based on the total weight of the cigarette paper. When the basis weight of the cigarette paper is within the preferred range (from 35 gsm to 50 gsm), the content of the filler is preferably from 15% by weight to 45% by weight. Furthermore, when the basis weight of the cigarette paper is more than 35 gsm to 50 gsm, the content of the filler is preferably from 25% by weight to 45% by weight. As the filler, calcium carbonate, titanium dioxide, kaolin, etc. can be used, but calcium carbonate is preferably used from the viewpoint of enhancing flavor and whiteness, etc.

[0082] Various auxiliary agents other than the base paper and fillers may be added to the cigarette paper. For example, a water resistance improver can be added to the cigarette paper to improve water resistance. The water resistance improver may include a wet strength agent (WS agent) and a sizing agent. The wet strength agent may include, for example, urea-formaldehyde resin, melamine-formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Furthermore, the sizing agent may include, for example, rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol having a saponification degree of 90% or more. A paper strength agent may be added to the cigarette paper as an auxiliary agent. The paper strength agent may include, for example, 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 as an auxiliary agent in wrapping paper improves breathability (see, for example, JP 2017-218699 A).

[0083] A coating agent may be added to at least one of the front and back surfaces of the wrapping paper. 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 coating agents 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).

[0084] 2 and 3(a), the tip plug 112 is located at the tip of the flavor-generating article 110 and is configured to cover the end of the flavor source 221. This prevents the flavor source 221 from falling out of the flavor-generating article 110. Specifically, the tip plug 112 includes a first filter medium 211 and a first inner plug wrap 212 that wraps around the first filter medium 211. The tip plug 112 may further include an aerosol source supported by the first filter medium 211.

[0085] The first filter material 211 can be any material commonly used as a filter material for flavor-generating articles. Specifically, the first filter material 211 can be, for example, paper, plastic film, cellulose acetate, or nonwoven fabric. The first filter material 211 is preferably paper. The longitudinal length of the tip plug 112 may be 1 mm or more, preferably 3 mm or more, more preferably 5 mm or more, and may be 10 mm or less, preferably 8 mm or less. The tip plug 112 can be manufactured to a predetermined length and then cut to any desired length. If the tip plug 112 is less than 1 mm long, it may not maintain its shape during cutting, and deformation such as crushing may occur. If the longitudinal length of the tip plug 112 is 1 mm or more, manufacturing the tip plug 112 can be relatively easy.

[0086] The paper used as a paper filter for a flavor-generating product can be used as the first filter medium 211. The paper used as the first filter medium 211 has a thickness of, for example, 20 μm or more and 1500 μm or less, and a basis weight of, for example, 20 g / m ２ 50g / m or more ２ The following is an example. The paper used as first filter medium 211 preferably has a rectangular shape, in which case one side has a length approximately equal to the length of tip plug 112, and the other side can have a length of 100 mm or more and 300 mm or less. Although the thickness, basis weight, and size of the paper used as first filter medium 211 have been described, these values ​​refer to the values ​​for the paper before it is subjected to a shaping process (e.g., pleating process, etc.). If first filter medium 211 is made of a material other than paper and has a sheet shape, such first filter medium 211 can have the same thickness and size as paper.

[0087] The first filter medium 211 may be formed from a corrugated sheet folded in the direction of the waves. This sheet is preferably paper. The first filter medium 211 is formed by folding such a corrugated sheet in the direction of the waves so as to form a cylindrical shape as a whole. In this case, the first filter medium 211 may have a plurality of air flow passages formed between the upstream end and the downstream end, extending in the length direction of the first filter medium 211.

[0088] The first filter material 211 does not need to contain tobacco materials such as shredded tobacco or sheet tobacco. The material of the first inner plug wrap 212 is not particularly limited, and known materials can be used. The first inner plug wrap 212 may contain a filler such as calcium carbonate. The thickness of the first inner plug wrap 212 is not particularly limited, and is typically 20 μm to 140 μm, preferably 30 μm to 130 μm, and more preferably 30 μm to 120 μm. The basis weight of the first inner plug wrap 212 is not particularly limited, and is typically 20 gsm to 100 gsm, preferably 22 gsm to 95 gsm, and more preferably 23 gsm to 90 gsm. The first inner plug wrap 212 may be coated or uncoated, but is preferably coated with a desired material from the perspective of imparting functions other than strength and structural rigidity.

[0089] 2, the flavor-generating article 110 preferably has a downstream section 130 arranged downstream of the flavor source 221. In this case, the downstream section 130 can cool and filter the vapor or aerosol generated in the flavor source 221. Specifically, the downstream section 130 preferably includes a filter plug 250. This allows the filter plug 250 to cool and filter the vapor or aerosol generated in the flavor source.

[0090] The filter plug 250 is located at the end of the flavor-generating article 110 on the mouthpiece side. The filter plug 250 includes a second filter material 251 and a second inner plug wrap 252 around which the second filter material 251 is wrapped. The filter material used for the second filter material 251 is not particularly limited as long as it has a general filter function. Typical filter functions include, for example, adjusting the amount of air mixed in when inhaling aerosols, reducing flavors, and reducing nicotine and tar, but the filter material used for the second filter material 251 does not need to have all of these functions. Furthermore, in electrically heated tobacco products, which tend to produce fewer components and have a lower tobacco filler filling rate compared to cigarette products, one important function is to suppress filtering while preventing the tobacco filler from falling out.

[0091] The cross section of the filter plug 250 perpendicular to the longitudinal direction is substantially circular. The diameter of the circle can be varied depending on the size of the product, but is typically 4.0 mm to 9.0 mm, preferably 4.5 mm to 8.5 mm, and more preferably 5.0 mm to 8.0 mm. If the cross section of the filter plug 250 is not circular, the diameter refers to the diameter of a circle having the same area as the cross section.

[0092] The circumferential length of the filter plug 250 in a cross section perpendicular to the longitudinal direction can be changed as appropriate to suit the size of the product, but is typically 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.

[0093] The length of the filter plug 250 in the longitudinal direction can be changed as needed to suit the size of the product, but is typically 15 mm to 35 mm, preferably 17.5 mm to 32.5 mm, and more preferably 20.0 mm to 30.0 mm. The shape and dimensions of the filter medium used in the second filter medium 251 can be adjusted as needed so that the shape and dimensions of the filter plug 250 fall within the above ranges.

[0094] The airflow resistance per 120 mm of the filter plug 250 in the longitudinal direction is not particularly limited, but is usually 40 mmH ２ O or more 300mmH ２ O or less, 70 mmH ２ O or more 280mmH ２ It is preferable that the pressure is 90 mmH or less. ２ O or more 260mmH ２ It is more preferable that the airflow resistance is 0 or less. The airflow resistance is measured in accordance with the ISO standard method (ISO 6565), for example, using a filter airflow resistance measuring device manufactured by Cerulean Co., Ltd. The airflow resistance of a filter plug 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 / sec) from one end face (first end face) to the other end face (second end face) of the filter plug in a state where air does not pass through the side faces of the filter plug. The unit is generally mmH. ２ It is known that the relationship between the airflow resistance of a filter plug and its length is proportional within the length range typically used (5 mm to 200 mm), and if the length is doubled, the airflow resistance of the filter plug 250 doubles.

[0095] The filter medium constituting the second filter medium 251 of the filter plug 250 may be, for example, one manufactured by the manufacturing method described below, or a commercially available product. The form of the filter plug 250 is not particularly limited, and may be a plain filter including a single filter segment, or a multi-segment filter including multiple filter segments, such as a dual filter or triple filter.

[0096] The filter plug 250 can be manufactured by a known method. For example, when synthetic fibers such as cellulose acetate tow are used as the material for the second filter medium 251, the filter plug 250 can be manufactured by spinning a polymer solution containing a polymer and a solvent and then crimping the resulting polymer. For example, the method described in International Publication No. 2013 / 067511 can be used. In manufacturing the filter plug 250, the airflow resistance and the additives to be added to the second filter medium 251 (such as known adsorbents, flavors (e.g., menthol), granular activated carbon, and flavor-retaining materials) can be appropriately designed.

[0097] The second filter material 251 constituting the filter plug 250 is not particularly limited, and known embodiments may be employed. For example, cellulose acetate tow processed into a cylindrical shape can be used as the second filter material 251. The single-filament fineness and total fineness of the cellulose acetate tow are not particularly limited. However, for a filter plug 250 with a circumference of 22 mm, the single-filament fineness is preferably 5 g / 9000 m to 12 g / 9000 m, and the total fineness is preferably 12,000 g / 9000 m to 35,000 g / 9000 m. Examples of cross-sectional shapes of the cellulose acetate tow fibers include circular, elliptical, Y-shaped, I-shaped, and R-shaped. In the case of a filter filled with cellulose acetate tow, triacetin may be added in an amount of 5 wt. % to 10 wt. % based on the weight of the cellulose acetate tow to improve filter hardness. Moreover, instead of the acetate filter, a paper filter filled with sheet-shaped pulp paper may be used.

[0098] The density of the second filter medium 251 is not particularly limited, but is usually 0.10 g / cm ３ 0.25g / cm or more ３ or less, and 0.11 g / cm ３ 0.24g / cm or more ３ It is preferable that the density is 0.12 g / cm or less. ３ 0.23g / cm or more ３ More preferably, it is:

[0099] To improve strength and structural rigidity, the filter plug 250 may include a second inner plug wrap 252 (wrap paper) around which the second filter medium 251 (described below) is wrapped. The second inner plug wrap 252 may include one or more rows of adhesive-containing seams. The adhesive may include, but is not limited to, a vinyl acetate adhesive or a hot melt adhesive, and the hot melt adhesive may include polyvinyl alcohol. When the filter segment is made up of two or more segments, the second inner plug wrap 252 is preferably wound around these two or more segments.

[0100] The material of the second inner plug wrap 252 is not particularly limited, and known materials can be used. The material may contain a filler such as calcium carbonate. The thickness of the second inner plug wrap 252 is not particularly limited, and is typically 20 μm to 140 μm, preferably 30 μm to 130 μm, and more preferably 30 μm to 120 μm. The basis weight of the second inner plug wrap 252 is not particularly limited, and is typically 20 gsm to 100 gsm, preferably 22 gsm to 95 gsm, and more preferably 23 gsm to 90 gsm. The second inner plug wrap 252 may be coated or uncoated, but is preferably coated with a desired material to provide functions other than strength and structural rigidity.

[0101] 2 and 3A, the hollow filter portion 240 and the filter plug 250 may be connected by, for example, an outer plug wrap (outer wrapping paper) 260. The outer plug wrap 260 may be, for example, a cylindrical piece of paper.

[0102] The second filter medium 251 may include a crushable additive release container (e.g., a capsule) including a crushable outer shell such as gelatin. The form of the capsule (also referred to in the art as an "additive release container") is not particularly limited, and any known form may be employed. For example, a crushable additive release container including a crushable outer shell such as gelatin may be employed. In this case, when the capsule is broken by a tobacco product user before, during, or after use, it releases a liquid or substance (usually a flavoring agent) contained within the capsule. The liquid or substance is then transferred to tobacco smoke while the tobacco product is being used, and to the surrounding environment after use.

[0103] The capsule form is not particularly limited, and may be, for example, a frangible capsule, preferably spherical in shape. The additive contained in the capsule may include any of the additives described above, and preferably includes flavorings and activated carbon. One or more materials that aid in filtering smoke may also be added as additives. The form of the additive is not particularly limited, and is typically liquid or solid. The use of capsules containing additives is well known in the art. Frangible capsules and methods for their manufacture are well known in the art. The flavoring may be, for example, menthol, spearmint, peppermint, fenugreek, clove, medium-chain triglycerides (MCT), or the like. The flavoring may be menthol, or a combination thereof.

[0104] In this embodiment, a flavoring may be added to the second filter material 251. By adding a flavoring to the second filter material 251, the amount of flavoring delivered during use is increased compared to conventional techniques in which flavoring is added to the tobacco filler that constitutes the tobacco rod. The degree of increase in the amount of flavoring delivered further increases depending on the position of the openings provided in the hollow tube portion 132, which will be described later. The method of adding the flavoring to the second filter material 251 is not particularly limited, and it only needs to be added so that the flavoring is dispersed substantially uniformly in the second filter material 251 to which the flavoring is to be added. The amount of flavoring added to the second filter material 251 can be 10 to 100% by volume of the second filter material 251. The flavoring may be added to the second filter material 251 in advance before the filter segments are constructed, or after the filter cigarette is constructed.

[0105] The type of the fragrance is not particularly limited, and examples of fragrances that can be used from the viewpoint of imparting a good flavor include 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-Methionine, methylparaben ... - Citronellol, clary sage extract, cocoa, coffee, konjac oil, coriander oil, cumin aldehyde, davana oil, δ-decalactone, γ-decalactone, decanoic acid, dill herb oil, 3,4-dimethyl-1,2-cyclopentanedione, 4,5-dimethyl-3-hydroxy-2,5-dihydrofuran-2-one, 3,7-dimethyl-6-octenoic acid, 2,3-dimethylpyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl octanoate, ethyl oleate, ethyl palmitate, ethyl phenylacetate, ethyl propionate, ethyl stearate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3,(5 or 6)-dimethylpyrazine, 5-ethyl-3-hydroxy-4-methyl-2(5H)-furanone, 2-ethyl-3-methylpyrazine, eucalyptol, fenugreek absolute, 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, lauryl methylpropional Ingredients: methicone, 4-hydroxy-4-(3-hydroxy-1-butenyl)-3,5,5-trimethyl-2-cyclohexen-1-one, 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, immortelle absolute, 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, robertia jasmine Orris root oil, maltol, maple syrup, menthol, menthone, L-menthyl acetate, para-methoxybenzaldehyde, methyl 2-pyrrolyl ketone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methylvaleric acid, mimosa absolute, honey, myristic acid, nerol, nerolidol, gamma-nonalactone, nutmeg oil, delta-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, omega-pentadeca Calactone, peppermint oil, petitgrain Paraguay oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract, propenylguaethol, propyl acetate, 3-propylidenephthalide, prune juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax absolute, marigold oil, tea distillate, α-terpineol, terpinyl acetate, 5,6,7,8-tetrahydroquinoxaline, 1,5,5,9-tetramethyl-13-oxacyclo(8.3.0.0(4.9))tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tridecanone, triethyl citrate, 4-(2,6,6-trimethyl-1-cyclohexenyl)2-buten-4-one, 2,6,6-trimethyl-2-cyclohexene-1,4-dione, 4-(2,6,6-trimethyl-1,3-cyclo Examples of the fragrance include (hexadienyl)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), with menthol being particularly preferred. These fragrances may be used alone or in combination of two or more.

[0106] The filter plug 250 of this embodiment includes a second filter medium 251, and activated carbon may be added to at least a portion of the second filter medium 251. The amount of activated carbon added is 15.0 m per flavor-generating article 110, calculated as the specific surface area of ​​the activated carbon × the weight of the activated carbon / the cross-sectional area of ​​the second filter medium 251 in the direction perpendicular to the airflow direction. ２ / cm ２ Over 80.0m ２ / cm ２ or less. For convenience, the above-mentioned "specific surface area of ​​activated carbon × weight of activated carbon / cross-sectional area perpendicular to the airflow direction of the second filter medium 251" may be expressed as "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 second filter medium 251 of one flavor-generating article 110, the weight of the added activated carbon, and the cross-sectional area of ​​the second filter medium 251. Note that activated carbon may not be uniformly dispersed in the filter medium to which it is added, and therefore it is not required that the above range be satisfied in all cross-sections (cross-sections perpendicular to the airflow direction) of the filter medium.

[0107] In this embodiment, by having the surface area of ​​activated carbon per unit cross-sectional area within the above range, the components generated by heating can be delivered to the user in the desired amount, and the user can be given the desired flavor sensation. If the surface area of ​​activated carbon per unit cross-sectional area is smaller than the lower limit of the above range, the effect of adding activated carbon cannot be fully obtained. On the other hand, if the surface area of ​​activated carbon per unit cross-sectional area is larger than the upper limit of the above range, the components generated by heating will be reduced more than necessary. The surface area of ​​activated carbon per unit cross-sectional area is 17.0 m ２ / cm ２ More preferably, it is 35.0 m or more. ２ / cm ２ It is more preferable that the distance is 77.0 m or more. ２ / cm ２ More preferably, it is 73.0 m or less. ２ / cm ２ It is even more preferable that:

[0108] The surface area of ​​activated carbon per unit cross-sectional area can be adjusted, for example, by adjusting the specific surface area of ​​activated carbon, the amount of activated carbon added, and the cross-sectional area perpendicular to the airflow direction of second filter medium 251. The calculation of the surface area of ​​activated carbon per unit cross-sectional area is based on the filter medium to which activated carbon is added. If filter plug 250 is composed of multiple filter media, the cross-sectional area and length of only the filter medium to which activated carbon is added are used as the basis.

[0109] Examples of activated carbon that can be used in this embodiment include those made from raw materials such as wood, bamboo, coconut shells, walnut shells, and coal. Also, examples of activated carbon that can be used in this embodiment include activated carbon with a BET specific surface area of ​​1100 m or more. ２ / g or more 1600m ２ / g or less, and preferably 1200m ２ / g or more 1500m ２ / g or less, and more preferably 1250m ２ / g or more 1380m ２The BET specific surface area can be determined by a nitrogen gas adsorption method (BET multipoint method).

[0110] The activated carbon usable in this embodiment may 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 even more preferably 600 μL / g or more and 700 μL / g or less. The pore volume can be calculated from the maximum adsorption amount obtained using a nitrogen gas adsorption method.

[0111] In this embodiment, the amount of activated carbon added per unit length in the airflow direction of the second filter medium 251 to which activated carbon is added is preferably 5 mg / cm or more and 50 mg / cm or less, more preferably 8 mg / cm or more and 40 mg / cm or less, and even more preferably 10 mg / cm or more and 35 mg / cm or less. In this embodiment, by setting the specific surface area of ​​the activated carbon and the amount of activated carbon added within the above ranges, the surface area of ​​the activated carbon per unit cross-sectional area can be adjusted as desired.

[0112] Furthermore, the activated carbon that can be used in this embodiment preferably has a cumulative 10% by volume particle diameter (particle diameter D10) of 250 μm or more and 1200 μm or less. Furthermore, the cumulative 50% by volume particle diameter (particle diameter D50) of the activated carbon particles is preferably 350 μm or more and 1500 μm or less. D10 and D50 are measured by a laser diffraction scattering method. An example of a suitable device for this measurement is the HORIBA Laser Diffraction / Scattering Particle Size Distribution Analyzer "LA-950." Powder is poured into the cell of this device together with pure water, and the particle diameter is detected based on the light scattering information of the particles. The measurement conditions for this device are as follows: Measurement mode: Manual flow-moh cell measurement Dispersion medium: Ion-exchanged water Dispersion method: Measurement 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: Measurements were performed twice with different samples

[0113] In this embodiment, the method of adding activated carbon to the second filter medium 251 is not particularly limited, and the activated carbon may be added so as to be dispersed substantially uniformly in the second filter medium 251 to which the activated carbon is to be added.

[0114] The filter plug 250 may be, for example, a commercially available product. The form of the filter plug 250 is not particularly limited, and it can be a filter including a single filter segment, or a multi-segment filter including multiple filter segments, such as a dual filter or triple filter. When the filter plug 250 is composed of a single filter segment, the second filter medium 251 to which activated carbon is added serves as the filter plug 250. On the other hand, when the filter plug 250 is composed of multiple filter segments, the second filter medium 251 to which activated carbon is added is preferably positioned upstream of the filter medium constituting the mouth end. Alternatively, activated carbon may be added to the filter medium constituting the mouth end. When the filter segment is a multi-segment filter, the length of the filter segment used as the basis for the amount of activated carbon added is the length of the filter medium to which activated carbon is added. The amount of activated carbon added is, for example, 4.0 mg to 24.0 mg, preferably 4.5 mg to 23.0 mg, and more preferably 10.5 mg to 22.0 mg, in terms of weight relative to the entire filter segment.

[0115] The downstream section 130 may further include a hollow tube section 132 and a hollow filter section 240. The hollow filter section 240 is disposed adjacent to and downstream of the hollow tube section 132. The hollow filter section 240 includes a third filter medium 241 and a third inner plug wrap 242 around which the third filter medium 241 is wound. The third inner plug wrap 242 may be the same as the plug wrap used in cigarettes. The third inner plug wrap 242 may be omitted. The hollow filter section 240 may also be omitted.

[0116] The hollow filter section 240 may include a third filter material 241 having one or more hollow portions and a third inner plug wrap 242 covering the third filter material 241. The hollow filter section 240 functions to increase the strength of the downstream section 130. The third filter material 241 may be, for example, a rod with an inner diameter of 1.0 mm to 5.0 mm, densely packed with cellulose acetate fibers and hardened with a triacetin-containing plasticizer added at 6% to 20% by mass relative to the mass of the cellulose acetate. Because the third filter material 241 has a high fiber packing density, during inhalation, air or aerosol flows only through the hollow portions, with almost no flow within the third filter material 241. Because the third filter material 241 inside the hollow filter section 240 is a fiber-packed layer, the external feel during use is less likely to cause discomfort to the user.

[0117] From the viewpoint of improving strength and structural rigidity, the hollow filter portion 240 may include a third inner plug wrap 242 (wrap paper) around which the third filter medium 241 is wrapped. The form of the third inner plug wrap 242 is not particularly limited, and it may include one or more rows of seams containing adhesive. The type of adhesive is not particularly limited, but may include a vinyl acetate adhesive or a hot melt adhesive. The hot melt adhesive may include polyvinyl alcohol. Furthermore, when the hollow filter portion 240 is composed of two or more segments, it is preferable that the third inner plug wrap 242 wraps these two or more segments together.

[0118] The material of the third inner plug wrap 242 is not particularly limited, and known materials can be used. The material may contain a filler such as calcium carbonate. The thickness of the third inner plug wrap 242 is not particularly limited, and is typically 20 μm to 140 μm, preferably 30 μm to 130 μm, and more preferably 30 μm to 120 μm. The basis weight of the third inner plug wrap 242 is not particularly limited, and is typically 20 gsm to 100 gsm, preferably 22 gsm to 95 gsm, and more preferably 23 gsm to 90 gsm. The third inner plug wrap 242 may be coated or uncoated, but is preferably coated with a desired material to provide functions other than strength and structural rigidity.

[0119] The hollow tube portion 132 is sandwiched adjacent to the flavor generating portion 220 and the hollow filter portion 240 or the filter plug 250 (if the hollow filter portion 240 is not present), and is typically a rod-shaped member having a cavity in a circumferential cross section of a cylinder or the like that is hollow (hollow). The longitudinal length of the hollow tube portion 132 can be appropriately changed according to the size of the product, but is typically 15 mm or more, preferably 20 mm or more, and typically 40 mm or less, preferably 35 mm or less, and more preferably 30 mm or less. By setting the longitudinal length of the hollow tube portion 132 at or above the lower limit, a sufficient cooling effect can be ensured to obtain a good flavor, while by setting it at or below the upper limit, loss due to adhesion of the generated steam and aerosol to the inner wall of the hollow tube portion 132 can be suppressed.

[0120] When a cooling sheet (e.g., a polylactic acid sheet packed in a gathered state) is filled into the hollow tube portion 132, the total surface area of ​​the hollow tube portion 132 is not particularly limited, and may be, for example, 300 mm ２ / mm or more 1000mm ２ This surface area is the surface area per length (mm) of the hollow tube portion 132 in the air flow direction. The total surface area of ​​the hollow tube portion 132 is 400 mm ２ / mm or more, and ２ / mm or more is more preferable, while 600 mm ２ / mm or less, and ２ / mm or less is more preferable.

[0121] It is desirable for hollow tube 132 to have an internal structure with a large total surface area. Thus, in a preferred embodiment, hollow tube 132 may be formed from a thin sheet of material that is wrinkled to form channels, and then pleated, gathered, and folded. The more folds or pleats there are in hollow tube 132, the greater the total surface area of ​​hollow tube 132. The thickness of the material from which hollow tube 132 is made is not particularly limited and may be, for example, from 5 μm to 500 μm, or from 10 μm to 250 μm.

[0122] As shown in FIGS. 2 and 3(a), the hollow tube portion 132 may be provided with circumferential and concentric openings vf (also referred to in the art as ventilation filters). The presence of the openings vf allows air to flow into the hollow tube portion 132 from the outside during use, lowering the temperature of the components and air flowing in from the flavor generating portion 220. The openings vf may be provided in a region 4 mm or more toward the hollow tube portion 132 from the boundary between the hollow tube portion 132 and the hollow filter portion 240 or the filter plug 250 (if the hollow filter portion 240 is not present). In this case, the openings vf not only improve the cooling capacity of the hollow tube portion 132 but also suppress the retention of components generated by heating within the hollow tube portion 132, thereby improving the delivery amount of the components. In addition, when an aerosol base material is used in the flavor generating section 220, the vapor containing the aerosol base material and tobacco flavor components generated when the flavor generating article 110 is heated comes into contact with air from the outside, lowers in temperature, and liquefies, thereby facilitating the generation of the aerosol.

[0123] Furthermore, when the concentrically arranged holes vf are considered to be one hole group, the number of hole groups may be one or more. When there are two or more hole groups, from the viewpoint of improving the delivery amount of components generated by heating, it is preferable that no hole groups be provided in an area less than 4 mm toward the hollow tube portion 132 from the boundary between the hollow tube portion 132 and the hollow filter portion 240 or the filter plug 250 (when the hollow filter portion 240 is not present).

[0124] Furthermore, when the hollow tube portion 132 is wrapped with tipping paper 270, it is preferable that the tipping paper 270 has an opening formed in a position directly above the opening vf formed in the hollow tube portion 132. When producing such a flavor-generating article 110, it is possible to prepare and wrap tipping paper 270 having an opening that overlaps with the opening vf, but from the viewpoint of ease of production, it is preferable to produce the flavor-generating article 110 using a hollow tube portion 132 that does not have the opening vf, and then drill a hole that passes through the hollow tube portion 132 and the tipping paper 270 simultaneously.

[0125] From the viewpoint of improving the delivery of components generated by heating, the region where the openings vf exist is preferably a region of 4.5 mm or more, more preferably a region of 5 mm or more, and even more preferably a region of 5.5 mm or more, from the boundary between the hollow tube portion 132 and the hollow filter portion 240 or the filter plug 250 (when the hollow filter portion 240 is not present) toward the hollow tube portion 132. Furthermore, from the viewpoint of ensuring cooling function, the region where the openings vf exist is preferably a region of 15 mm or less, more preferably a region of 10 mm or less, and even more preferably a region of 7 mm or less, from the boundary toward the hollow tube portion 132.

[0126] From the viewpoint of improving the delivery of components generated by heating, the region where the openings vf exist is preferably a region of 24 mm or more, preferably a region of 24.5 mm or more, preferably a region of 25 mm or more, and more preferably a region of 25.5 mm or more, extending from the mouth end of flavor-generating article 110 toward hollow tube portion 132. Furthermore, from the viewpoint of ensuring cooling function, the region where the openings vf exist is preferably a region of 35 mm or less, more preferably a region of 30 mm or less, and even more preferably a region of 27 mm or less, extending from the mouth end of flavor-generating article 110 toward hollow tube portion 132.

[0127] Furthermore, when the axial length of the hollow tube portion 132 is 20 mm or more, the region where the openings vf exist is preferably a region of 5 mm or more, more preferably a region of 10 mm or more, and even more preferably a region of 13 mm or more, from the viewpoint of ensuring cooling function, from the boundary between the hollow tube portion 132 and the flavor generating portion 220 toward the hollow tube portion 132. Furthermore, when the axial length of the hollow tube portion 132 is 20 mm or more, the region where the openings vf exist is preferably a region of 16 mm or less, more preferably a region of 15.5 mm or less, even more preferably a region of 15 mm or less, and particularly preferably a region of 14.5 mm or less, from the boundary between the hollow tube portion 132 and the flavor generating portion 220, from the viewpoint of improving delivery of components generated by heating.

[0128] The openings (vf) can be arranged so that when an automatic smoking machine inhales at 17.5 ml / sec, the air inflow rate (the volumetric rate of air inflowing through the openings (vf) when the volumetric rate of air inhaled from the mouth end is taken as 100% by volume) is 10 to 90% by volume, preferably 50 to 80% by volume, and more preferably 55 to 75% by volume. This air inflow rate can be achieved, for example, by selecting the number of openings (vf) per opening group from the range of 5 to 50 and the diameter of the openings (vf) from the range of 0.1 to 0.5 mm. The air inflow rate can be measured using a roll measuring instrument (e.g., a SODIMAX d74 / SODIM manufactured by S.A.S.) in accordance with a method conforming to ISO 9512.

[0129] The configuration of the outer plug wrap 280 is not particularly limited and can be any common configuration. Specifically, for example, the outer plug wrap 280 can be primarily made of pulp. Pulp can be wood pulp, such as softwood pulp or hardwood pulp, or pulp commonly used in cigarette paper for tobacco products, such as flax pulp, hemp pulp, sisal pulp, and esparto. The outer plug wrap 280 can be obtained by papermaking one or more of these pulps. These pulps can be used alone or in any combination of two or more types. Pulp types that can be used include chemical pulp obtained by kraft cooking, acidic, neutral, or alkaline sulfite cooking, and soda cooking, ground pulp, chemi-ground pulp, and thermomechanical pulp. Commercially available products may be used for the outer plug wrap 280. The shape of the outer plug wrap 280 is not particularly limited and can be, for example, square or rectangular.

[0130] The basis weight of the outer plug wrap 280 is not particularly limited, but is typically 20 gsm to 70 gsm, preferably 30 gsm to 50 gsm, and more preferably 34 gsm to 38 gsm. The thickness of the outer plug wrap 280 is not particularly limited, but is typically 30 mm to 80 mm, preferably 33 mm to 50 mm, and more preferably 35 mm to 40 mm. The air permeability of the outer plug wrap 280 is not particularly limited, but is typically 0 Coresta units to 30,000 Coresta units, and preferably more than 0 Coresta units to 10,000 Coresta units. The air permeability is a value measured in accordance with ISO 2965:2009, and is the rate at which an area of ​​1 cm2 is lost per minute when the differential pressure between both sides of the paper is 1 kPa. ２ Flow rate of gas passing through (cm ３ ) One Coresta unit (1 Coresta unit, 1 C.U.) is expressed as cm under 1 kPa. ３ / (min cm ２ )

[0131] The outer plug wrap 280 may contain a filler. Examples of fillers include 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, and gypsum. It is preferable that the outer plug wrap 280 contains calcium carbonate, particularly from the viewpoints of improving whiteness and opacity and increasing the heating rate. These fillers may be used alone or in combination.

[0132] Various auxiliary agents may be added to the outer plug wrap 280. The outer plug wrap 280 may contain, for example, a water resistance improver. The water resistance improver may include a wet strength agent (WS agent) and a sizing agent. The wet strength agent may include, for example, urea-formaldehyde resin, melamine-formaldehyde resin, polyamide epichlorohydrin (PAE), etc. The sizing agent may include, for example, rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more.

[0133] A coating agent may be added to at least one of the front and back surfaces of the outer plug wrap 280. There are no particular restrictions 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.

[0134] The configuration of the tipping paper 270 is not particularly limited and can be any common configuration. Specifically, for example, the tipping paper 270 can be primarily composed of pulp. Pulp can be wood pulp, such as softwood pulp or hardwood pulp, or pulp commonly used in cigarette paper for tobacco products, such as flax pulp, hemp pulp, sisal pulp, and esparto. The tipping paper 270 can be obtained by papermaking one or more of these pulps. These pulps can be used alone or in any combination of multiple types in any ratio. Pulp types that can be used include chemical pulps produced by kraft cooking, acidic, neutral, or alkaline sulfite cooking, and soda cooking, ground pulp, chemi-ground pulp, and thermomechanical pulp. Commercially available tipping paper 270 may be used. The shape of the tipping paper 270 is not particularly limited and can be, for example, square or rectangular. Furthermore, the flavor generating article 110 may have one tipping paper 270 or may have a plurality of tipping papers 270 .

[0135] The basis weight of the tipping paper 270 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 270 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 the value of the air permeability of an area of ​​1 cm per minute when the differential pressure between both sides of the paper is 1 kPa. ２ Flow rate of gas passing through (cm ３ ) One Coresta unit (1 Coresta unit, 1 C.U.) is expressed as cm under 1 kPa. ３ / (min cm ２ )

[0136] The tipping paper 270 may contain a filler. Examples of fillers include 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, and gypsum. It is particularly preferable that the tipping paper 270 contains calcium carbonate, from the viewpoints of improving whiteness and opacity and increasing the heating rate. These fillers may be used alone or in combination of two or more.

[0137] Various auxiliary agents may be added to the tip paper 270. The tip paper 270 may contain, for example, a water resistance improver. The water resistance improver may include a wet strength agent (WS agent) and a sizing agent. The wet strength agent may include, for example, urea formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Furthermore, the sizing agent may be, for example, rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), or highly saponified polyvinyl alcohol with a saponification degree of 90% or more.

[0138] A coating agent may be added to at least one of the front and back surfaces of the tipping paper 270. 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.

[0139] A portion of the outer surface of the tipping paper 270 may be covered with a lip release material. The lip release material refers to a material that helps a user easily separate the tipping paper 270 from their lips without causing substantial adhesion when they hold the mouthpiece of the flavor-generating article 110 between their mouths. The lip release material may include, for example, ethyl cellulose or methyl cellulose. For example, the outer surface of the tipping paper 270 may be coated with the lip release material by applying an ethyl cellulose- or methyl cellulose-based ink to the outer surface of the tipping paper 270. In this embodiment, the lip release material is provided at least in a predetermined mouthpiece region that comes into contact with the user's lips when the user holds the mouthpiece in their mouth. More specifically, the lip release material may be provided on the outer surface of the tipping paper 270 between the mouthpiece end (the end of the filter plug 250) and the opening vf.

[0140] Next, the manner in which the components constituting the flavor-generating article 110 are connected will be described. In FIG. 2 , gaps are provided between the components to make the connection easier to see. However, in an actual flavor-generating article 110, the components are adjacent to each other without any gaps, as shown in FIG. 3 . In the flavor-generating article 110 shown in FIG. 2 , the five components are connected using an outer plug wrap 280, an outer plug wrap 260, and tipping paper 270. Specifically, as shown in FIG. 2 , the outer plug wrap 280 connects the tip plug 112, the flavor-generating section 220, and the hollow tube section 132. Here, the outer plug wrap 280 is wrapped around the tip plug 112, the flavor-generating section 220, and a portion of the hollow tube section 132 to cover them entirely. This connected body is referred to as a first connected body 285. Furthermore, the outer plug wrap 260 connects the hollow filter section 240 and the filter plug 250 by wrapping around them to cover them entirely. This connected body is referred to as a second connected body 265. Furthermore, tipping paper 270 connects the first connector 285 and the second connector 265. Here, the tipping paper 270 covers the entire second connector 265 and a portion of the first connector 285, leaving the first connector 285 exposed at the upstream end. Note that in the example shown in FIG. 2 , the outer plug wrap 280 does not cover the hollow tube portion 132 to the downstream end, leaving the hollow tube portion 132 exposed at the downstream end. However, the outer plug wrap 280 may cover the hollow tube portion 132 to the downstream end. In this case, an opening is preferably provided in the outer plug wrap 280 directly above the opening vf provided in the hollow tube portion 132. As a result, the opening vf is preferably provided so as to penetrate the tipping paper 270, the outer plug wrap 280, and the hollow tube portion 132.

[0141] FIG. 4 is an exploded perspective view of a flavor generating article 110 according to another embodiment. The flavor generating article 110 shown in FIG. 4 differs from the flavor generating article 110 shown in FIGS. 2 and 3 only in the manner of connection. In the flavor generating article 110 shown in FIG. 4, five components are connected using an outer plug wrap 280, an outer plug wrap 260, and tipping paper 270. Specifically, as shown in FIG. 4, the outer plug wrap 280 connects the tip plug 112 and the flavor generating portion 220 by wrapping them together so as to cover their entirety. This connected body is referred to as a first connected body 285. In the example shown in FIG. 4, the outer plug wrap 260 connects the hollow filter portion 240 and the filter plug 250 by wrapping them together so as to cover their entirety. This connected body is referred to as a second connected body 265. Furthermore, the tipping paper 270 connects the first connected body 285, the hollow tube portion 132, and the second connected body 265. Here, the tipping paper 270 covers the entire hollow tube portion 132 and the second connecting body 265 and a portion of the first connecting body 285, leaving the first connecting body 285 exposed at the upstream end. Five components may be connected in the configuration shown in Fig. 4. Note that, in Fig. 4, the outer plug wrap 280 covers the flavor generating section 220 up to the downstream end, but the flavor generating section 220 may not be covered all the way to the downstream end, leaving the flavor generating section 220 exposed at the downstream end.

[0142] As shown in Fig. 1 , when the flavor generating article 110 is properly inserted into the heating unit 30 of the flavor inhaler 120, a portion of the flavor generating article 110 may be exposed to the outside of the flavor inhaler 120. Specifically, in the state shown in Fig. 1 , all or a portion of the second connecting body 265 shown in Fig. 2 or 4 may be exposed to the outside of the flavor inhaler 120. Furthermore, in the state shown in Fig. 1 , a portion of the hollow tube portion 132 shown in Fig. 2 or 4 may be exposed to the outside of the flavor inhaler 120. In this case, the opening vf formed in the hollow tube portion 132 may be exposed to the outside of the flavor inhaler 120, or may be located inside the flavor inhaler 120 (upstream of the opening through which the flavor generating article 110 is inserted). It is preferable that the opening vf formed in the hollow tube portion 132 be located inside the flavor inhaler 120, since this makes it difficult for the user to block the opening vf.

[0143] The flavor generating section 220 may have a first portion that overlaps with the heat source 40 of the flavor inhaler 120 along the longitudinal direction of the flavor generating article 110 when the flavor generating article 110 is accommodated at a desired position in the flavor inhaler 120, and a second portion that does not overlap with the heat source 40. The longitudinal length of the first portion of the flavor generating section 220 is preferably 40% to 60% of the longitudinal length of the flavor generating section 220. Furthermore, the longitudinal length of the flavor generating section 220 is preferably 10 mm or less.

[0144] As described above, in the flavor inhaler 120 shown in Fig. 1, when the preheating is completed and the user starts smoking, a large amount of moisture, which has a relatively low boiling point among the components contained in the flavor-generating article 110, tends to evaporate and remain in the flavor-generating article 110. As a result, the first inhalation (first puff) may contain a large amount of water vapor, which may cause discomfort to the user. For this reason, in this embodiment, the airflow resistance of the tip plug 112 is set to 1 mmH ２ O or more 150mmH ２ It is preferable that the airflow resistance of the flavor generating article 110 is 0 or less, and the ratio of the airflow resistance of the flavor generating article 110 to the airflow resistance of the tip plug 112 is 2 or more and 15 or less.

[0145] In this case, the tip plug 112 increases the airflow resistance of the entire flavor generating article 110, thereby reducing the amount of water vapor supplied to the user in the first puff. Furthermore, because the tip plug 112 increases the airflow resistance of the entire flavor generating article 110, it is possible to reduce the need to adjust the airflow resistance of portions of the flavor generating article 110 other than the tip plug 112 (e.g., the flavor source 221 or the downstream portion 130), thereby improving the design freedom of the flavor generating article 110. When the airflow resistance of the tip plug 112 is within the above-mentioned numerical range and the ratio is within the above-mentioned numerical range, the tip plug 112 can increase the airflow resistance of the entire flavor generating article 110 while preventing the airflow resistance of the entire flavor generating article 110 from becoming too large.

[0146] The airflow resistance of the tip plug 112 is 5 mmH ２ O or more 50mmH ２ It is more preferable that the pressure is 10 mmH or less. ２ O or more 25mmH２ It is more preferable that the resistance to inhalation is 0 or less. In this case, it is possible to provide the user with a comfortable inhalation resistance while reducing the amount of water vapor supplied to the user in the first puff. Note that the airflow resistance of tip plug 112 refers to the airflow resistance before flavor-generating article 110 is used, i.e., the airflow resistance before the heat-deformable material 112a, which will be described later, is deformed.

[0147] Here, the airflow resistance is measured in accordance with the ISO standard method (ISO 6565:2015) using, for example, a filter airflow resistance measuring device 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 / sec) from one end face (first end face) to the other end face (second end face) in a state where air does not pass through the side face of the object. The unit is generally mmH. ２ The airflow resistance is represented by O. The airflow resistance varies depending on the length of the object. In this embodiment, the airflow resistance of the tip plug 112 means the airflow resistance between the end face adjacent to the flavor source 221 and the opposite end face.

[0148] 3, the tip plug 112 of the flavor-generating article 110 of this embodiment preferably includes a heat-deformable material 112a. In this case, the heat-deformable material 112a in the tip plug 112 can be deformed by heating, and the airflow resistance of the tip plug 112 can be changed by the deformation of the heat-deformable material 112a in response to heating of the flavor-generating article 110. As a result, the airflow resistance of the tip plug 112 can be changed to a desired airflow resistance as the smoking session progresses.

[0149] In this specification, the term "heat-deformable material 112a" refers to a material whose shape can be changed by heating. The heat-deformable material 112a can have any shape, such as a sphere, an ellipsoid, a disk, a cylinder, or a rectangle. The heat-deformable material 112a may include at least one selected from the group consisting of a structure containing fibers, a structure containing a gel composition, a structure containing wax, a capsule, and a film. This allows the heat-deformable material 112a to be deformed by heating.

[0150] Specifically, the fiber-containing structure may be formed, for example, by weaving multiple fibers or bundling fibers. The fiber may be, for example, a polyethylene-based fiber or an acetate-based fiber. Heating the fiber causes the fiber to shrink, thereby changing the airflow resistance of the distal plug 112. The gel composition-containing structure may be, for example, a polysaccharide-containing structure. The polysaccharide is not particularly limited, but is preferably a single-component system of carrageenan, agar, gellan gum, tamarind gum, psyllium seed gum, or konjac glucomannan; or a composite system combining two or more components selected from the group consisting of carrageenan, locust bean gum, guar gum, agar, gellan gum, tamarind gum, xanthan gum, tara gum, konjac glucomannan, starch, cassia gum, and psyllium seed gum. Wax is a compound formed by ester bonding between a fatty acid and a fatty alcohol. Wax is also called wax. The wax may be, for example, a plant-based wax, an animal-based wax, a petroleum-based wax, a synthetic wax, or the like. In addition to wax, a fatty acid or an aliphatic alcohol may also be used. When a structure containing a gel composition or a structure containing wax is used as the heat-deformable material 112a, the state of these structures changes at the melting point or softening point due to heating, thereby changing the airflow resistance of the tip plug 112.

[0151] The capsule may have, for example, an outer shell and a core portion housed inside the outer shell. The outer shell may contain at least one material selected from the group consisting of, for example, gelatin, modified cellulose such as hydroxypropyl methylcellulose, modified starch, etc. The core portion may be, for example, a liquid containing any flavor compound. In this case, when the outer shell is destroyed by heating, the volume of the capsule decreases and the airflow resistance of the tip plug 112 changes. The film may contain at least one material selected from the group consisting of, for example, modified cellulose such as hydroxypropyl methylcellulose, gelatin, modified starch, etc. Such a film may be disposed on a portion of the tip plug 112. When the film is deformed or destroyed by heating, the airflow resistance of the tip plug 112 changes.

[0152] As described above, the heat-deformable material 112a can change its state or shape when heated, thereby reducing the airflow resistance of the tip plug 112 to a desired level as the smoking session progresses. Thus, the flavor-generating article 110 has a high airflow resistance at the beginning of the smoking session, for example, in the first puff, which is high enough to reduce water vapor supplied to the user, and can reduce the airflow resistance in the latter half of the smoking session to provide the user with a comfortable draw resistance.

[0153] The heat-deformable material 112a preferably deforms when heated to a temperature of 40°C or higher and 180°C or lower. In this case, heating the flavor source 221 can deform the heat-deformable material 112a contained in the tip plug 112 located upstream of the flavor source 221. In this case, if the tip plug 112 is a filter such as a paper filter or a nonwoven fabric filter, the heat-deformable material 112a can be deformed without the tip plug 112 being denatured by heat. The flavor source 221 can be heated to a temperature of 200°C or higher and 400°C or lower by the heating source 40 shown in FIG. 1 .

[0154] In a cross section perpendicular to the direction in which the flavor source 221 and the tip plug 112 are adjacent as shown in FIG. 3( b), the area occupied by the heat deformable material 112a relative to the area of ​​the tip plug 112 is preferably 2% or more and 55% or less. If the area is less than 2%, it may be difficult to sufficiently increase the airflow resistance using the heat deformable material 112a. If the area is more than 55%, the airflow resistance may be too high. Therefore, as long as the area is within the above numerical range, the heat deformable material 112a can provide the tip plug 112 with the desired airflow resistance.

[0155] 3(b), in a cross section perpendicular to the direction in which the flavor source 221 and the tip plug 112 are adjacent to each other, the heat deformable material 112a is preferably disposed approximately at the center of the tip plug 112. In this case, air can be supplied evenly to the downstream flavor source 221 compared to when the heat deformable material 112a is biasedly disposed on the tip plug 112, thereby enabling efficient delivery of vapor or aerosol generated in the flavor source 221. In addition, as shown in FIG. 3(b), the heat deformable material 112a is preferably disposed in an inner region of a circle concentric with the tip plug 112 in a cross section perpendicular to the direction in which the flavor source 221 and the tip plug 112 are adjacent to each other.

[0156] The heat-deformable material 112a may be disposed inside the tip plug 112 as shown in FIG. 3(b), or a portion of the heat-deformable material 112a may be exposed from the tip plug 112. For example, the heat-deformable material 112a may be exposed on the upstream end surface or the downstream end surface of the tip plug 112. The timing of the thermal deformation of the heat-deformable material 112a can be adjusted by adjusting the longitudinal distance between the heat-deformable material 112a and the heated flavor source 221. This allows the heat-deformable material 112a to be thermally deformed at any timing during a smoking session, i.e., the airflow resistance can be changed at any timing during a smoking session.

[0157] 2 to 4 is heated by the flavor inhaler 120 of the smoking system 100 shown in Fig. 1. The control unit 20 of the flavor inhaler 120 preferably controls the heating unit 30 to heat the flavor generating article 110 so that the amount of water vapor contained in the first puff by the user is 3 mg / puff to 5 mg / puff. In this way, the flavor generating article 110 and the flavor inhaler 120 of the present embodiment can heat the flavor generating article 110 so as to reduce the amount of water vapor contained in the first puff of the flavor generating article 110.

[0158] In addition, in this smoking system 100, the airflow resistance of the tip plug 112 in the fifth puff is at least 2.5 mmH higher than the airflow resistance of the tip plug 112 in the first puff. ２In this case, since the airflow resistance of the tip plug 112 can be reduced as the smoking session progresses, the smoking system 100 can reduce the amount of water vapor contained in the vapor or aerosol at the beginning of the smoking session and reduce the airflow resistance from the fifth puff onwards, thereby providing the user with a comfortable inhalation resistance. Specifically, for example, in this smoking system 100, the heat deformable material 112a deforms as the smoking session progresses, so that the airflow resistance of the fifth puff is at least 2.5 mmH lower than the airflow resistance of the first puff. ２ O can be reduced.

[0159] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications are possible within the scope of the claims and the technical concept described in the specification and drawings. Furthermore, any shape or material not directly described in the specification and drawings is within the scope of the technical concept of the present invention as long as it achieves the functions and effects of the present invention. For example, in the above embodiment, the flavor inhaler 120 employs a so-called counterflow airflow configuration, but this is not limiting and a so-called bottom flow airflow configuration may also be employed.

[0160] Some of the aspects disclosed in the present specification are described below. (1) A flavor-generating article comprising: a flavor source; and an upstream portion disposed upstream of the flavor source, wherein the upstream portion has an airflow resistance of 1 mmH. ２ O or more 150mmH ２ (2) The flavor-generating product according to (1), wherein the ratio of the airflow resistance of the flavor-generating product to the airflow resistance of the upstream portion is 5 mmH or less, and the ratio of the airflow resistance of the flavor-generating product to the airflow resistance of the upstream portion is 2 or more and 15 or less. ２ O or more 50mmH ２ (3) The flavor-generating article according to (1) or (2), wherein the flavor-generating article has an airflow resistance of 30 mmH or less. ２ O or more 150mmH ２(4) The flavor generating article according to any one of (1) to (3), wherein the upstream portion includes a heat-deformable material. (5) The flavor generating article according to (4), wherein the heat-deformable material is configured to melt from a solid to a liquid when heated. (6) The flavor generating article according to (4) or (5), wherein the heat-deformable material includes at least one selected from the group consisting of a structure including fibers, a structure including a gel composition, a structure including wax, a capsule, and a film. (7) The flavor generating article according to any one of (4) to (6), wherein the heat-deformable material is deformed when heated to a temperature of 40°C or higher and 180°C or lower. (8) The flavor generating article according to any one of (4) to (7), wherein, in a cross section perpendicular to the direction in which the flavor source and the upstream section are adjacent to each other, the area occupied by the heat deformable material relative to the area of ​​the upstream section is 2% or more and 55% or less. (9) The flavor generating article according to any one of (4) to (8), wherein, in a cross section perpendicular to the direction in which the flavor source and the upstream section are adjacent to each other, the heat deformable material is disposed at approximately the center of the upstream section. (10) The flavor generating article according to any one of (1) to (9), wherein the flavor generating article comprises a downstream section disposed downstream of the flavor source. (11) The flavor generating article according to (10), wherein the downstream section includes a filter plug. (12) A smoking system comprising a flavor generating article according to any one of (1) to (11) and a flavor inhaler equipped with a heating unit that heats the flavor generating article, wherein the flavor inhaler has a control unit that controls the heating unit, and the control unit controls the heating unit to heat the flavor generating article so that the amount of water vapor contained in the first puff is 3 mg / puff to 5 mg / puff. (13) In the smoking system according to (12), the airflow resistance of the upstream portion of the fifth puff is at least 2.5 mmH higher than the airflow resistance of the upstream portion of the first puff. ２ O Small smoking system.

[0161] 20: Control unit 30: Heating unit 80: Flavor source 100: Smoking system 110: Flavor-generating article 112: Upstream unit 112a: Heat-deformable material 120: Flavor inhaler 130: Downstream unit 131: Filter plug

Claims

1. A flavor generating article comprising: a flavor source; and an upstream portion disposed upstream of the flavor source, the upstream portion having an airflow resistance of 1 mmH ２ O or more 150mmH ２ 0 or less, and a ratio of the airflow resistance of the flavor generating article to the airflow resistance of the upstream portion is 2 or more and 15 or less.

2. In the flavor generating product according to claim 1, the airflow resistance of the upstream portion is 5 mmH ２ O or more 50mmH ２ A flavor generating article having a flavor of O or less.

3. The flavor generating article according to claim 1 or 2, wherein the flavor generating article has an airflow resistance of 30 mmH ２ O or more 150mmH ２ A flavor generating article having a flavor of O or less.

4. A flavor generating article according to any one of claims 1 to 3, wherein the upstream portion comprises a heat deformable material.

5. The flavor generating article of claim 4, wherein said heat deformable material is configured to melt from a solid to a liquid upon application of heat.

6. A flavor generating article according to claim 4 or 5, wherein the heat deformable material comprises at least one selected from the group consisting of a structure containing fibers, a structure containing a gel composition, a structure containing wax, a capsule, and a film.

7. A flavor generating article according to any one of claims 4 to 6, wherein the heat deformable material is deformed by being heated to a temperature of 40°C or higher and 180°C or lower.

8. A flavor generating article as described in any one of claims 4 to 7, wherein in a cross section perpendicular to the direction in which the flavor source and the upstream portion are adjacent to each other, the area occupied by the heat deformable material relative to the area of ​​the upstream portion is 2% or more and 55% or less.

9. A flavor generating article according to any one of claims 4 to 8, wherein in a cross section perpendicular to the direction in which the flavor source and the upstream portion are adjacent to each other, the heat deformable material is disposed approximately at the center of the upstream portion.

10. A flavor generating article as claimed in any one of claims 1 to 9, comprising a downstream portion disposed downstream of said flavor source.

11. The flavor generating article of claim 10, wherein said downstream portion includes a filter plug.

12. A smoking system comprising a flavor generating article as described in any one of claims 1 to 11, and a flavor inhaler equipped with a heating unit for heating the flavor generating article, wherein the flavor inhaler has a control unit for controlling the heating unit, and the control unit controls the heating unit to heat the flavor generating article so that the amount of water vapor contained in the first puff is 3 mg / puff or more and 5 mg / puff or less.

13. In the smoking system according to claim 12, the airflow resistance of the upstream portion of the fifth puff is at least 2.5 mmH higher than the airflow resistance of the upstream portion of the first puff. ２ O Small, smoking system.

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