Flavor suction article

Abstract

To improve aerosol delivery efficiency as compared to a case where an amount of air passing through a radially inside portion is constant.SOLUTION: A flavor suction article includes a base material part that generates aerosol when heated, and an upstream part located in an upstream side of the base material part. The upstream part has a center part held in a compressed state. The center part expands when the compression state is relaxed as a temperature becomes high.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to flavor inhalation articles. [Background technology]

[0002] Patent document 1 describes a heated aerosol-generating article comprising a rod of an aerosol-generating substrate and a wrapper at least partially surrounding the rod of the aerosol-generating substrate, the wrapper comprising a heating control element on at least one surface of the wrapper, the heating control element comprising one or more circumferential bands of heat-shrinkable material, and when the heat-shrinkable material is heated to a temperature higher than its shrinkage temperature, the inner diameter of each of the one or more circumferential bands of heat-shrinkable material is reduced by at least 20 percent compared to the inner diameter of each circumferential band before heating, thereby causing the portion of the aerosol-generating substrate below the heating control element to deform so as to reduce the resistance to draw (RTD) of the aerosol-generating article. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Table 2021-520791 Summary of the Invention [Problem to be solved by the invention]

[0004] In a peripheral heating flavor inhalation article in which the portion that generates the aerosol is heated from the radially outer side, heat is conducted from the radially outer side to the radially inner side. Since the aerosol is generated in accordance with the heat conduction, the aerosol is initially generated mainly from the radially outer side, and the temperature gradually rises in the center, causing the aerosol to be generated mainly from the center. From the viewpoint of aerosol delivery efficiency, it is desirable that the main air flow path change according to the amount of aerosol generated. An object of the present disclosure is to improve the efficiency of aerosol delivery compared to a constant volume of air passing through the radially inner portion. [Means for solving the problem]

[0005] To this end, the present disclosure provides a flavor inhalation article comprising a substrate portion that generates an aerosol when heated, and an upstream portion located upstream of the substrate portion, the upstream portion having a central portion that is held in a compressed state, and the central portion expands as the compressed state is relaxed as the temperature rises. Here, the device may have a winding member wound around the entire circumference of the center, and an adhesive member joining both ends of the winding member, and the center is held in a compressed state by the winding member, and the center expands as the adhesive force between the two ends of the winding member decreases. The adhesive member may be made of a material that allows both ends of the winding member to peel away from each other at a temperature of 80°C or higher and 180°C or lower. The core may also be free of plasticizers. The upstream portion may also have a peripheral portion surrounding the outer periphery of the central portion. The peripheral portion may contract as the central portion expands. The periphery may also comprise cellulose acetate or paper. The core may also include cellulose acetate. Furthermore, in the early stage of a smoking session of the substrate, the airflow resistance of the peripheral portion may be smaller than the airflow resistance of the central portion, and in the later stage of a smoking session of the substrate, the airflow resistance of the peripheral portion may be greater than the airflow resistance of the central portion. The periphery may also include a heat shrink material. Furthermore, the central portion and the peripheral portion may contain cellulose acetate, and before heating of the base portion or during the early stages of a smoking session, the packing density of the cellulose acetate constituting the peripheral portion may be lower than the packing density of the cellulose acetate constituting the central portion. The airflow resistance of the central portion of the substrate portion during an early stage of a smoking session may be greater than the airflow resistance of the central portion of the substrate portion during a later stage of a smoking session. The substrate portion may also include a first aerosol source radially outward, a second aerosol source radially inward, and a sheet positioned between the first aerosol source and the second aerosol source. The air conditioner may further include a downstream portion located downstream of the base portion, the downstream portion having an air vent for allowing air to flow from the outside to the inside. The downstream portion may also have a filter portion through which the aerosol generated from the base portion passes, and a cylindrical member formed in a cylindrical shape between the base portion and the filter portion, and the air vent may be located in the cylindrical member. In addition, the ratio of the amount of air inflow from the upstream portion to the amount of air inflow from the ventilation hole during the early stage of a smoking session of the base material may be different from the ratio of the amount of air inflow from the upstream portion to the amount of air inflow from the ventilation hole during the later stage of a smoking session of the base material. The upstream portion may have a vent hole on a side surface thereof for allowing air to flow from the outside to the inside. [Effects of the Invention]

[0006] According to the present disclosure, the efficiency of aerosol delivery can be improved compared to when the amount of air passing through the radially inner portion is constant. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram showing a vertical cross section of a flavor inhalation article according to an embodiment of the present invention. [Figure 2] 1 is a schematic diagram illustrating an example of the configuration of a suction device according to an embodiment of the present invention; [Figure 3] FIG. 2 is a diagram showing an example of a cross section of a tip portion according to the present embodiment. [Figure 4] FIG. 10 is a diagram showing an example of a cross-section of the tip end portion of the present embodiment at a later stage of a smoking session. [Figure 5] FIG. 1 illustrates the air flow path at the tip of a smoking session. [Figure 6] FIG. 10 shows the air flow path at the tip of the smoking session. [Figure 7] FIG. 10 is a diagram showing a vertical cross section of a flavor inhalation article according to a first modified example. [Figure 8] FIG. 10 is a view showing a cross section of a base member according to a first modified example. [Figure 9] FIG. 10 is a diagram showing a vertical cross section of a flavor inhalation article according to a second modified example. [Figure 10] FIG. 10 is a diagram showing an example of a cross section of the tip end portion of the third modified example at the early stage of a smoking session. [Figure 11] FIG. 10 is a diagram showing an example of a cross section of the tip end portion of the third modified example at a later stage of a smoking session. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, in which the same parts are designated by the same reference numerals.

[0009] Fig. 1 is a diagram showing a vertical cross section of a flavor inhalation article 1 according to this embodiment. Fig. 2 is a schematic diagram showing a configuration example of an inhalation device 100 according to this embodiment. The flavor inhalation article 1 according to this embodiment includes a substrate portion 10 that generates an aerosol when heated, a filter portion 30 that reduces nicotine and tar, and a tip portion 70 disposed at the upstream end of the flavor inhalation article 1. The flavor inhalation article 1 may also include a cooling portion 20. The mouthpiece segment 50 may be held in the user's mouth during inhalation, and in the example of FIG. 1 , includes the cooling portion 20 and the filter portion 30. The substrate portion 10 is formed in a cylindrical shape. Hereinafter, the direction of the center line CL of the substrate portion 10 may be referred to as the "center line direction." The flavor inhalation article 1 further includes tipping paper 40 that integrates the tip portion 70, substrate portion 10, cooling portion 20, and filter portion 30 by winding them in this order in the center line direction. Hereinafter, one end side in the center line direction (the left side in FIG. 1) may be referred to as the first side, and the other end side in the center line direction (the right side in FIG. 1) may be referred to as the second side. The first side is the end side inserted into the inhalation device 100 and is the upstream side in the flow of aerosol during inhalation. The second side is the opposite side to the first side and is the end side that the user holds in their mouth for inhalation and is the downstream side in the flow of aerosol during inhalation. A cross section along the center line direction is referred to as a "longitudinal cross section," and a cross section cut along a plane perpendicular to the center line direction is defined as a "transverse cross section." A direction intersecting the center line direction (e.g., the perpendicular direction) is referred to as a "radial direction." In the radial direction, the side on the center line CL side may be simply referred to as the "inner side," and the side away from the center line CL may be simply referred to as the "outer side." Mouthpiece segment 50 is an example of a downstream portion.

[0010] [Usage of flavor inhalation product 1] The flavor inhalation article 1 according to this embodiment is used in a non-combustion heating type inhalation device 100. As shown in Fig. 2, the inhalation device 100 includes a power supply unit 111 that stores power and supplies power to each component of the inhalation device 100, a sensor unit 112 that detects various information related to the inhalation device 100, and a notification unit 113 that notifies the user of the information. The inhalation device 100 also includes a memory unit 114 that stores various information for the operation of the inhalation device 100, a communication unit 115 that transmits and receives information between the inhalation device 100 and other devices, and a control unit 116 that controls the overall operation of the inhalation device 100. The inhalation device 100 also includes a heating unit 121 that heats the flavor inhalation article 1, a holding unit 140 that holds the flavor inhalation article 1, an opening 142 that connects the internal space 141 to the outside, and a heat insulating unit 144 that prevents heat transfer from the heating unit 121 to other components of the inhalation device 100. In the inhalation device 100, the flavor inhalation article 1 is held in the holding portion 140, and the user inhales.

[0011] The heating unit 121 heats the base material 10 of the flavor inhalation article 1. The heating unit 121 is made of any material, such as metal or polyimide. For example, the heating unit 121 is configured in a film shape and is arranged to cover the outer periphery of the holding unit 140. When the heating unit 121 generates heat, the aerosol source 11 included in the flavor inhalation article 1 is heated from the outer periphery of the flavor inhalation article 1. The heating unit 121 generates heat when power is supplied from the power supply unit 111. As an example, power may be supplied when the sensor unit 112 detects that a predetermined user input has been made. When the temperature of the flavor inhalation article 1 heated by the heating unit 121 reaches a predetermined temperature, the user can inhale. Thereafter, when the sensor unit 112 detects that a predetermined user input has been made, power supply may be stopped. As another example, power may be supplied and aerosol may be generated during a period when the sensor unit 112 detects that the user has inhaled. 2, the heating part 121 is configured to be at the same position and have the same length as the base part 10 of the flavor inhalation article 1 in the center line direction when the flavor inhalation article 1 is held by the holding part 140, but is not limited to this. For example, the heating part 121 may be configured to have a length that reaches the tip part 70, and the position and length at which the heating part 121 is arranged may be selected as appropriate as long as the base part 10 is configured to be heated.

[0012] The heat insulating section 144 is disposed so as to cover at least the outer periphery of the heating section 121. For example, the heat insulating section 144 is made of a vacuum heat insulating material, an aerogel heat insulating material, or the like. Note that the vacuum heat insulating material is a heat insulating material in which, for example, glass wool, silica (silicon powder), or the like is wrapped in a resin film and placed in a high vacuum state, thereby reducing the heat conduction of gas to as close to zero as possible.

[0013] [Flavor suction article 1] The flavor inhalation article 1 is a non-combustion heating type, peripheral heating type flavor inhalation article. In the peripheral heating type flavor inhalation article 1, the aerosol source 11 of the base member 10 is disposed at a position closer to the heating unit as it is radially outward, and heat is conducted from the radially outward toward the radially inward. The cross section of the flavor inhalation article 1 is substantially circular, and its circumference can be changed appropriately according to the size of the product, but is usually 16 mm to 27 mm, and preferably 21 mm to 23 mm. If the cross section is not circular, the circumference is assumed to be a circle having the same area as the cross section, and the circumference of that circle is applied. The size of the flavor inhalation article 1 in the direction of the center line can be changed appropriately according to the size of the product, but is usually 40 mm or more and 100 mm or less, and preferably 50 mm or more and 70 mm or less.

[0014] [Base material part 10] The substrate 10 includes an aerosol source 11 that generates vapor that generates an aerosol when heated, and a cigarette paper 12 that covers the outer periphery of the aerosol source 11. The substrate 10 is formed into a cylindrical shape by wrapping the aerosol source 11 around the cigarette paper 12. The aerosol source 11 may be derived from tobacco, such as a processed product obtained by molding tobacco shreds or tobacco raw materials into granules, sheets, or powder. The aerosol source 11 may also include a non-tobacco-derived material made from plants other than tobacco (e.g., mint and herbs). For example, the aerosol source 11 may contain a flavoring. The type of flavoring is not particularly limited, and an example is menthol, from the viewpoint of imparting a favorable flavor. These flavorings may be used alone, or two or more types may be used in combination. When the inhalation device 100 is a medical inhaler, the aerosol source 11 may contain a medication to be inhaled by the patient. At least a part of the substrate portion 10 is accommodated in the internal space 141 of the holding portion 140 in a state in which the flavor inhalation article 1 is held by the holding portion 140 .

[0015] The substrate 10 formed by wrapping the aerosol source 11 in the wrapping paper 12 preferably has a cylindrical shape that satisfies the aspect ratio defined by mathematical formula 1 of 1 or more.

[0016] (Number 1) Aspect ratio = h / w

[0017] In Formula 1, w is the width of the cross section of the substrate 10, h is the size of the substrate 10 in the center line direction, and it is preferable that h≧w. The shape of the cross section is not limited and may be polygonal, rounded polygonal, circular, elliptical, etc., and the width w is the diameter when the cross section is circular, the major axis when the cross section is elliptical, or the diameter of the circumscribing circle or the major axis of the circumscribing ellipse when the cross section is polygonal or rounded polygonal. The width of the cross section of the aerosol source 11 constituting the substrate 10 is preferably 4 mm or more and 9 mm or less.

[0018] The size h of the substrate 10 in the center line direction can be changed as appropriate depending on the size of the product, but is usually 8 mm or more, preferably 10 mm or more, and is usually 70 mm or less, preferably 30 mm or less. In addition, the ratio of the size h of the substrate 10 to the size of the flavor inhalation article 1 in the center line direction is not particularly limited, but from the viewpoint of the balance between the delivery amount and the aerosol temperature, it is usually 10% or more, preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more. In addition, the ratio of the size h of the substrate 10 to the size of the flavor inhalation article 1 is usually 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.

[0019] The content of the aerosol source 11 in the substrate 10 is not particularly limited, but may be 200 mg to 800 mg, and preferably 250 mg to 600 mg. This range is particularly suitable for a substrate 10 having a circumference of 22 mm and a size of 20 mm in the centerline direction.

[0020] Here, the aerosol source 11 containing tobacco shreds will be described. The material of the tobacco shreds contained in the aerosol source 11 is not particularly limited, and known materials such as lamina or ribs can be used. Alternatively, the aerosol source 11 may be a shredded tobacco product obtained by pulverizing dried tobacco leaves to an average particle size of 20 μm to 200 μm, homogenizing the shredded tobacco, and processing it into a sheet (hereinafter simply referred to as a homogenized sheet). Furthermore, the aerosol source 11 may be a so-called strand type, in which a homogenized sheet having a size approximately the same as the size in the center line direction of the substrate 10 is shredded approximately parallel to the center line direction of the substrate 10 and filled with the shredded sheet. Furthermore, the width of the tobacco shreds is preferably 0.5 mm or more and 2.0 mm or less when filling aerosol source 11.

[0021] Various types of tobacco can be used for the production of shredded tobacco and homogenized sheets. Examples include flue-cured tobacco, burley, oriental, native tobacco, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures thereof. Mixtures can be appropriately blended to achieve the desired flavor. Details of tobacco varieties are disclosed in the "Encyclopedia of Tobacco," Tobacco Research Center, March 31, 2009. There are several conventional methods 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 material onto 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 then extruding the mixture into a rolled sheet. Details of the types of homogenizing sheets are disclosed in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."

[0022] The moisture content of the aerosol source 11 can be 10% by mass or more and 15% by mass or less, and is preferably 11% by mass or more and 13% by mass or less, based on the total amount of the aerosol source 11. Such a moisture content suppresses the occurrence of stains during rolling and improves the suitability for rolling up during the production of the base material 10.

[0023] The aerosol source 11 is not particularly limited and may contain extracts and / or components thereof from various natural products depending on the intended use. Examples of extracts and / or components thereof include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof. The content of the extract and / or its constituent components in aerosol source 11 is not particularly limited, and from the viewpoint of generating sufficient aerosol and imparting a good flavor, it is usually 5% by mass or more, and preferably 10% by mass or more, relative to the total amount of aerosol source 11. Moreover, the content of the extract and / or its constituent components in aerosol source 11 is usually 50% by mass or less, and preferably 15% by mass or more and 25% by mass or less.

[0024] The packing density of the aerosol source 11 is not particularly limited, but is usually 250 mg / cm from the viewpoint of ensuring the performance of the flavor inhalation article 1 and imparting a good flavor. 3 or more, preferably 300 mg / cm 3 The packing density of the aerosol source 11 is usually 400 mg / cm 3 or less, preferably 350 mg / cm 3 The following is the result.

[0025] The aerosol source 11 may also be made of a tobacco sheet. The number of tobacco sheets may be one, or two or more.

[0026] In the case where the aerosol source 11 is composed of a single tobacco sheet, for example, the tobacco sheet may be filled with a tobacco sheet having one side approximately the same size as the centerline of the filling material, folded multiple times horizontally in the centerline of the filling material (so-called gathered sheet).In addition, the tobacco sheet may be filled with a tobacco sheet having one side approximately the same size as the centerline of the filling material, wound in a direction perpendicular to the centerline of the filling material.

[0027] In the case where the aerosol source 11 is composed of two or more tobacco sheets, for example, a plurality of tobacco sheets, each having a side approximately the same size as the centerline of the filling material, are wound in a direction perpendicular to the centerline of the filling material so as to be concentrically arranged. "Concentrically arranged" means that the centers of all the tobacco sheets are positioned at approximately the same position. 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. Furthermore, the thicknesses of the tobacco sheets may be the same or different. There are no restrictions on the thickness of each tobacco sheet, but in terms of the balance between heat transfer efficiency and strength, it is preferably 150 μm or more and 1000 μm or less, and more preferably 200 μm or more and 600 μm or less.

[0028] The aerosol source 11 can be manufactured by preparing a plurality of tobacco sheets of different widths, stacking them so that the width decreases from the first side to the second side to prepare a laminate, and passing this through a winding tube to roll up and form it. According to this manufacturing method, a plurality of tobacco sheets extend in the centerline direction and are arranged concentrically around the centerline CL. In this manufacturing method, the laminate is preferably prepared so that non-contact portions are formed between adjacent tobacco sheets after rolling. The presence of non-contact portions (gaps) between multiple tobacco sheets where the tobacco sheets do not come into contact ensures flavor flow paths and improves the delivery efficiency of flavor components. On the other hand, heat from the heating unit 121 can be transferred to the outer tobacco sheets via the contact portions between the multiple tobacco sheets, ensuring high heat transfer efficiency. In order to provide non-contact portions between multiple tobacco sheets where the tobacco sheets do not come into contact, examples of methods for preparing a laminate include using embossed tobacco sheets, laminating adjacent tobacco sheets without bonding the entire surfaces of the sheets together, laminating adjacent tobacco sheets with only a portion of the sheets bonded together, or laminating adjacent tobacco sheets with only a light bonding of the entire surfaces or a portion of the sheets together so that they can be peeled off after rolling and molding. When preparing the substrate 10 including the wrapping paper 12, the wrapping paper 12 may be placed on the end face of the first side of the laminate.

[0029] The tobacco sheet can be appropriately produced by known methods such as paper making, slurry, rolling, etc. The above-mentioned homogenized sheet can also be used. In the case of papermaking, it can be produced by a method including the following steps: 1) Dry tobacco leaves are coarsely crushed and extracted with water to separate the water extract and residue. 2) The water extract is dried and concentrated under reduced pressure. 3) Pulp is added to the residue, which is then fiberized in a refiner and made into paper. 4) A concentrated solution of the water extract is added to the paper-made sheet and dried to produce 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, tobacco can be produced by a method including the following steps: 1) Mixing water, pulp, a binder, and crushed tobacco leaves; 2) Spreading (casting) the mixture thinly and drying it. In this case, a step of irradiating the slurry of water, pulp, a binder, and crushed tobacco leaves with ultraviolet light or X-rays to remove some of the components such as nitrosamines may be added.

[0030] Alternatively, as described in WO 2014 / 104078, a nonwoven tobacco sheet can be used, which is produced by a method including the following steps: 1) mixing powdered tobacco leaves with a binder; 2) sandwiching the mixture between nonwoven fabrics; and 3) molding the laminate into a fixed shape by heat welding to obtain a nonwoven tobacco sheet. The type of tobacco leaf material used in each of the above methods can be the same as that described for the aerosol source 11 containing shredded tobacco. The composition of the tobacco sheet is not particularly limited, but for example, the content of tobacco raw materials (tobacco leaves) is preferably 50% by mass or more and 95% by mass or less relative to the total mass of the tobacco sheet. The tobacco sheet may also contain a binder, and examples of such binders include guar gum, xanthan gum, carboxymethyl cellulose, and sodium salts of carboxymethyl cellulose. The amount of binder is preferably 1% by mass or more and 10% by mass or less relative to the total mass of the tobacco sheet. The tobacco sheet may further contain other additives. Examples of additives include fillers such as pulp.

[0031] The configuration of the cigarette paper 12 used in the base material 10 is not particularly limited and can be any common embodiment, for example, one whose main component is pulp. Pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing non-wood pulp commonly used in cigarette papers 12 for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto. Usable types of pulp include chemical pulp produced by kraft cooking, acidic, neutral or alkaline sulfite cooking, soda cooking, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc.

[0032] Pulp is used in a papermaking process using a Fourdrinier paper machine, a cylinder paper machine, a combined cylinder / short-cylinder paper machine, or the like to adjust and homogenize the texture of the cigarette paper 12. If necessary, a wet strength agent can be added to impart water resistance to the cigarette paper 12, or a sizing agent can be added to adjust the printing quality of the cigarette paper 12. Furthermore, internal papermaking aids such as aluminum sulfate, various anionic, cationic, nonionic, or amphoteric retention aids, drainage aids, and paper strength agents, as well as papermaking additives such as dyes, pH adjusters, antifoaming agents, pitch control agents, and slime control agents, can be added.

[0033] The basis weight of the base paper for the cigarette paper 12 is, for example, usually 20 gsm or more, preferably 25 gsm or more, while the basis weight is usually 65 gsm or less, preferably 50 gsm or less, and more preferably 45 gsm or less. The thickness of the cigarette paper 12 is not particularly limited, and from the viewpoints of rigidity, breathability, and ease of adjustment during papermaking, it is usually 10 μm or more, preferably 20 μm or more, and more preferably 30 μm or more. The thickness of the cigarette paper 12 is usually 100 μm or less, preferably 75 μm or less, and more preferably 50 μm or less.

[0034] The shape of the wrapping paper 12 may be square or rectangular. When the aerosol source 11 is wrapped in the wrapping paper 12 into a cylindrical shape, for example, an end of the wrapping paper 12 and an end of the wrapping paper 12 on the opposite side are overlapped by about 2 mm in the circumferential direction and glued together to form a cylindrical paper tube shape filled with the aerosol source 11. The size of the rectangular wrapping paper 12 can be determined depending on the size of the base material 10.

[0035] In addition to the above pulp, a filler may be contained in the cigarette paper 12. The content of the filler relative to the total mass of the cigarette paper 12 can be 10% by mass or more and 60% by mass or less, and preferably 15% by mass or more and 45% by mass or less. In the cigarette paper 12, the filler content is preferably 15% by mass or more and 45% by mass or less within the preferred range of basis weight (25 gsm or more and 45 gsm or less). Furthermore, when the basis weight is 25 gsm or more and 35 gsm or less, the filler content is preferably 15% by weight or more and 45% by weight or less, and when the basis weight is 35 gsm or more and 45 gsm or less, the filler content is preferably 25% by weight or more and 45% by weight or less. As the filler, calcium carbonate, titanium dioxide, kaolin, etc. can be used, but calcium carbonate is preferably used from the viewpoint of enhancing flavor and whiteness.

[0036] Various auxiliary agents other than the base paper and fillers may be added to the cigarette paper 12. For example, a water resistance improver may be added to improve water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea-formaldehyde resin, melamine-formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more. A paper strength agent may be added as an auxiliary, and examples thereof include polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, polyvinyl alcohol, etc. In particular, it is known that the use of a very small amount of oxidized starch improves air permeability (Japanese Patent Laid-Open Publication No. 2017-218699).

[0037] A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the wrapping paper 12. There are no particular limitations on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred. Examples of the coating agent include polysaccharides such as alginic acid and its salts (e.g., sodium salts), 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).

[0038] [Tip Paper 40] The tip paper 40 is wound around the outer peripheral surfaces of the tip portion 70 , the base portion 10 , the cooling portion 20 and the filter portion 30 . The shape of the tipping paper 40 is not particularly limited, and can be, for example, square or rectangular. The basis weight of the tipping paper 40 is not particularly limited, but is usually 32 gsm or more and 60 gsm or less, preferably 33 gsm or more and 55 gsm or less, and more preferably 34 gsm or more and 53 gsm or less. The air permeability of the tipping paper 40 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. Here, "air permeability" is a value measured in accordance with ISO2965:2009, and is the value of the air permeability measured at a pressure difference of 1 kPa between the two surfaces of the paper and an area of ​​1 cm per minute. 2 Flow rate of gas passing through (cm 3 ) 1 Coresta Unit (1 Coresta Unit, 1 C.U.) is cm under 1 kPa. 3 / (min·cm 2 )

[0039] The composition of the tipping paper 40 is not particularly limited and can be any common embodiment, such as one containing pulp as the main component. Pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing non-wood pulp commonly used in cigarette papers for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto. These pulps may be used alone or in any combination of two or more types in any ratio. Pulp types that can be used include chemical pulp produced by kraft cooking, acidic, neutral, or alkaline sulfite cooking, soda cooking, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc. The tipping paper 40 may be produced by the above-mentioned production method or may be a commercially available product.

[0040] In addition to the materials described above, the tipping paper 40 may contain fillers, such as metal carbonates such as calcium carbonate and magnesium carbonate, metal oxides such as titanium oxide, titanium dioxide and aluminum oxide, metal sulfates such as barium sulfate and calcium sulfate, metal sulfides such as zinc sulfide, quartz, kaolin, talc, diatomaceous earth, gypsum, etc., and it is particularly preferable that the tipping paper 40 contain calcium carbonate from the viewpoints of improving whiteness and opacity and increasing the heating rate. Furthermore, these fillers may be used alone or in combination of two or more types.

[0041] In addition to the materials and fillers described above, the tipping paper 40 may contain various auxiliary agents. For example, the tipping paper 40 may contain a water resistance improver to improve water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea-formaldehyde resin, melamine-formaldehyde resin, and polyamide epichlorohydrin (PAE). Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more.

[0042] A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the tipping paper 40. There are no particular restrictions on the coating agent, but a coating agent that can form a film on the surface and reduce liquid permeability is preferred. A portion of the outer surface of the tipping paper 40 may be covered with a lip release material. The lip release material refers to a material configured to help the lip and the tipping paper 40 to easily separate without causing substantial adhesion when the user holds the filter portion 30 of the flavor inhalation article 1 in their mouth. The lip release material may include, for example, ethyl cellulose, methyl cellulose, nitrocellulose, etc. For example, the outer surface of the tipping paper 40 may be coated with the lip release material by applying an ethyl cellulose-based or methyl cellulose-based ink to the outer surface of the tipping paper 40.

[0043] [Cooling section 20] The cooling unit 20 is disposed adjacent to the substrate unit 10 and the filter unit 30, and is formed so that the cross section of a cylinder or the like is hollow (hollow) by wrapping the sheet 21 around it. The cooling unit 20 cools the vapor generated by heating the substrate unit 10 to generate an aerosol. The cooling unit 20 is an example of a cylindrical member. The cross section of the cooling section 20 is substantially circular, and its circumference can be changed as appropriate to suit the size of the product, but it is preferable that it is approximately the same as the circumference of the filter 31 described below. If the cross section is not circular, the circumference is assumed to be a circle having the same area as the cross section, and the circumference of that circle is applied. The size of the cooling section 20 in the centerline direction can be changed appropriately depending on the size of the product, but is usually 5 mm or more, preferably 10 mm or more, and more preferably 15 mm or more. The size of the cooling section 20 in the centerline direction is usually 35 mm or less, preferably 30 mm or less, and more preferably 25 mm or less. The size of the cooling section 20 in the centerline direction preferably satisfies any combination of the above-mentioned lower and upper limits. By setting the size of the cooling section 20 in the centerline direction to be equal to or greater than the above-mentioned lower limit, a sufficient cooling effect can be ensured to obtain a good flavor, while by setting it to be equal to or less than the above-mentioned upper limit, loss of the generated steam and aerosol due to adhesion to the sheet 21 can be suppressed.

[0044] For example, the cooling section 20 is a paper tube formed by winding a sheet 21 made of paper. Specifically, the cooling unit 20 is a paper tube formed by bonding together a plurality of sheets 21 including at least paper and winding them in a spiral shape, a so-called spiral paper tube. The spiral paper tube manufacturing method makes it possible to easily form a paper tube with a circular cross section. By employing a spiral paper tube for the cooling unit 20, the strength of the cooling unit 20 can be improved while reducing the area of ​​the cooling unit 20. Furthermore, by combining and bonding a sheet member containing a fragrance component, a flavor component, tobacco powder, etc. with paper, it is possible to impart a new flavor and taste to the aerosol. Alternatively, the cooling unit 20 may be a paper tube formed by winding paper multiple times into a cylindrical shape, a so-called straight paper tube. In the manufacturing method of a straight paper tube, the amount of glue used to attach the paper can be reduced compared to the manufacturing method of a spiral paper tube. Furthermore, the cooling section 20 may be a paper tube formed by stacking a plurality of sheets 21 including at least paper. By stacking a plurality of sheets 21, the strength of the cooling section 20 can be maintained even when the basis weight of each of the sheets 21 is small.

[0045] The thickness of sheet 21 is not particularly limited and may be, for example, 50 μm to 500 μm, or 100 μm to 250 μm. The material of sheet 21 is not particularly limited and may be, for example, a material whose main component is pulp, or a material whose main component is any of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, cellulose acetate, and aluminum foil, or any combination thereof. The cooling section 20 is formed by winding the sheet 21, but this is an example of a cylindrical member formed into a cylindrical shape, and the cooling section 20 is not limited to this configuration as long as the cross section is hollow. The cooling section 20 may be formed, for example, from a pipe made of synthetic resin or the like that already has a hollow cross section.

[0046] The cooling unit 20 is provided with a plurality of through-holes 60 (also referred to as "ventilation filters (Vf)" in the present technical field) arranged concentrically in the circumferential direction thereof. The through-holes 60 are holes that penetrate the sheet 21. Examples of the hole shapes include polygonal, rounded polygonal, circular, and elliptical. The through-holes 60 are present in an area through which air can flow in from the outside of the flavor inhalation article 1, in other words, in an area that protrudes from the opening 142 when the flavor inhalation article 1 is held in the holding unit 140 of the inhalation device 100.

[0047] The presence of the through-holes 60 makes it possible to adjust the concentration of the inhaled flavor components and aerosol. Furthermore, the presence of multiple through-holes 60 allows air to flow into the cooling section 20 from the outside during inhalation, lowering the temperature of the steam and air flowing in from the substrate section 10. Furthermore, by providing the through-holes 60 in the cooling section 20 within a region 4 mm or more from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, not only is the cooling capacity improved, but the retention of the substance (product) generated by heating within the cooling section 20 is suppressed, thereby improving the delivery amount of the product. In addition, when the base material 10 is heated, the vapor generated using the aerosol as a condensation nucleus comes into contact with air from the outside, lowering its temperature and liquefying, thereby accelerating the generation of the aerosol.

[0048] When a plurality of concentric through holes 60 in the cooling section 20 are treated as one through hole group, the number of through hole groups may be one or two or more. When two or more through hole groups are present, it is preferable that no through hole group be provided in a region less than 4 mm from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, from the viewpoint of improving the delivery amount of components generated by heating. Furthermore, when the flavor inhalation article 1 is configured such that the tip portion 70, the substrate portion 10, the cooling portion 20, and the filter portion 30 are wrapped with tipping paper 40, the tipping paper 40 preferably has an air hole formed in a position directly above the through-hole 60 formed in the cooling portion 20. When producing such a flavor inhalation article 1, tipping paper 40 having an air hole that overlaps with the through-hole 60 may be prepared and wrapped, but from the viewpoint of ease of production, it is preferable to produce a flavor inhalation article 1 without a through-hole 60 and then drill holes that pass through both the cooling portion 20 and the tipping paper 40 at the same time.

[0049] From the viewpoint of improving the delivery of the product by heating, the region where the through-holes 60 exist is not particularly limited as long as it is a region of 4 mm or more from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, but from the viewpoint of further improving the delivery of the product, it 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. Furthermore, from the viewpoint of ensuring the cooling function, the region where the through-holes 60 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 between the cooling section 20 and the filter section 30.

[0050] Furthermore, when the boundary between the cooling section 20 and the substrate 10 is used as a reference, if the size of the cooling section 20 in the centerline direction is 20 mm or more, the region where the through-holes 60 exist is preferably a region of 5 mm or more in the direction toward the cooling section 20 from the boundary between the cooling section 20 and the substrate 10, from the viewpoint of ensuring the cooling function, more preferably a region of 10 mm or more, and even more preferably a region of 13 mm or more. Furthermore, from the viewpoint of improving the delivery of the product by heating, the region where the through-holes 60 exist is preferably a region of 16 mm or less from the boundary between the cooling section 20 and the substrate 10, 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.

[0051] The through holes 60 are arranged so that the air inflow rate through the through holes 60 is 10% by volume or more and 90% by volume or less when an automatic smoking machine inhales at 17.5 ml / sec. This "air inflow rate" is the volumetric rate of air inflowing through the through holes 60 when the rate of air inhaled from the mouth end is taken as 100% by volume. The air inflow rate is preferably 50% by volume or more and 80% by volume or less, and more preferably 55% by volume or more and 75% by volume or less. These air inflow rates can be achieved, for example, by selecting the number of through holes 60 per through hole group from the range of 5 to 50, selecting the diameter of the through holes 60 from the range of 0.1 mm to 0.5 mm, and combining these selections. The air inflow ratio can be measured using a winding quality measuring device (SODIMAX D74 / SODIM manufactured by SAS) in accordance with a method conforming to ISO9512.

[0052] [Filter section 30] The filter unit 30 is formed in a columnar shape whose size in the center line direction is greater than the width of the cross section, and is therefore arranged so that the longitudinal direction of the filter unit 30 is the same as the center line direction. The filter unit 30 has a filter 31 through which the aerosol passes, and a wrapper paper 35 that is located between the filter 31 and tipping paper 40 and is wrapped around the outer periphery of the filter 31. The filter unit 30 is connected to the cooling unit 20 by winding the cooling unit 20 and the filter unit 30 together using the tipping paper 40. The wrapper paper 35 may not be provided.

[0053] The filter 31 is not particularly limited as long as it contains a filter material and has the general functions of a filter. Examples of general filter functions include reducing nicotine and tar, as well as reducing unpleasant sensations such as irritation. The filter 31 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. Furthermore, the filter 31 may contain additives such as known flavors like menthol, adsorbents, granular activated carbon, and flavor retention agents, as appropriate. The filter material constituting the filter 31 is, for example, a cylindrically shaped filler made of acetate, charcoal, cellulose fiber, nonwoven fabric, pulp paper, etc. Alternatively, a paper filter filled with sheet-like pulp paper may be used.

[0054] The form of the wrapping paper 35 is not particularly limited, and it may include one or more rows of seams containing adhesive. The adhesive may include a hot melt adhesive, and the hot melt adhesive may further include polyvinyl alcohol. The adhesive may also include a vinyl acetate adhesive. Furthermore, when the filter unit 30 is made up of two or more components, it is preferable that the wrapping paper 35 is made by wrapping each of these two or more components and then wrapping them together with another wrapping paper. The material of the wrapper 35 is not particularly limited, and known materials can be used, and may contain fillers such as calcium carbonate. Furthermore, the wrapper 35 may be either coated or uncoated, but it is preferable to coat it with a desired material in order to impart functions other than strength and structural rigidity.

[0055] The shape of the wrapper 35 for producing the filter portion 30 can be, for example, a square or a rectangle. When the filter 31 is wound in the wrapping paper 35 into a cylindrical shape, for example, an end of the wrapping paper 35 and an end of the wrapping paper 35 on the opposite side are overlapped by about 2 mm in the circumferential direction and glued together to form a cylindrical paper tube shape, inside which the filter 31 is packed. The size of the wrapping paper 35 can be determined depending on the size of the filter part 30.

[0056] [Tip 70] 3 is a diagram showing an example of a cross section of the tip portion according to this embodiment, taken along line III-III in FIG. The tip portion 70 has a central portion 71 disposed inside and a peripheral portion 72 surrounding the outer periphery of the central portion 71. The tip portion 70 also has a winding member 73 between the central portion 71 and the peripheral portion 72. The peripheral portion 72 is configured to surround at least a portion of the outer periphery of the central portion 71. The tip portion 70 is connected to the base portion 10 by wrapping tipping paper 40 around the outer periphery of the peripheral portion 72 and winding the base portion 10 and the tip portion 70 together. The tip portion 70 is an example of an upstream portion.

[0057] The cross section of the tip 70 is substantially circular, and its circumference can be changed appropriately depending on the size of the product, but can be 22 mm or more and 25 mm or less. If the cross section is not circular, the circumference is assumed to be a circle having the same area as the cross section, and the circumference of that circle is applied. The size of the tip portion 70 in the centerline direction can be changed appropriately according to the size of the product, but may be 1 mm or more, preferably 3 mm or more, and more preferably 5 mm or more. The size of the tip portion 70 in the centerline direction may be 10 mm or less, preferably 8 mm or less. The tip portion 70 can be manufactured to a predetermined length and then cut to any desired length. If the tip portion 70 is less than 1 mm long, it may not be able to maintain its shape when cut, and deformation such as crushing may occur. If the length of the tip portion 70 in the longitudinal direction is 1 mm or more, manufacturing of the tip portion 70 can be carried out relatively easily.

[0058] In the tip portion 70, the central portion 71 and the peripheral portion 72 are portions through which air flowing in from the first side of the flavor inhalation article 1 passes. The central portion 71 is held in a compressed state by the winding member 73 and expands when the compressed state is released. The central portion 71 is made of, for example, acetate, and air passes through the central portion 71 in the centerline direction when suction is applied. The central portion 71 made of acetate can be produced by a known method. For example, when synthetic fibers such as cellulose acetate are used as the material, the central portion 71 can be produced by spinning a polymer solution containing a polymer and a solvent and crimping the solution. For example, the method described in WO 2013 / 067511 can be used as this method. Preferably, the central portion 71 is formed of cellulose acetate without a plasticizer, which allows the central portion 71 to be suitably compressed by the winding member 73 and to suitably expand in response to an increase in the temperature of the distal end portion 70. The material of the central portion 71 is not limited to acetate, and may be any material that can be held in a compressed state and expands when the compressed state is released.

[0059] When the central portion 71 expands, the peripheral portion 72 contracts in accordance with the expansion. The peripheral portion 72 is formed by filling it with, for example, acetate or a sheet material, and when the user inhales, air passes through the peripheral portion 72 in the direction of the center line. When the peripheral portion 72 is formed from acetate, it is manufactured by a known method, similar to the central portion 71 described above. The peripheral portion 72 preferably contains cellulose acetate. When the central portion 71 and the peripheral portion 72 are composed of cellulose acetate, the packing density of the cellulose acetate constituting the peripheral portion 72 is preferably configured to be lower than the packing density of the cellulose acetate constituting the central portion 71 before heating the substrate portion 10 or in the early stage of a smoking session. This makes it possible to achieve expansion of the central portion 71 and contraction of the peripheral portion 72. Before heating the substrate portion 10 or in the early stage of a smoking session, the packing density of the cellulose acetate constituting the peripheral portion 72 is preferably 0.05 g / cm. 3 More than 0.23g / cm 3The packing density of the cellulose acetate constituting the central portion 71 is preferably 0.15 g / cm or less. 3 More than 0.45g / cm 3 It is preferable that: When the peripheral portion 72 is formed by filling a sheet member, for example, a sheet member that forms voids is filled. The material of the sheet member is not particularly limited, but paper such as pulp paper, which is primarily composed of pulp, or nonwoven fabric is preferred, and paper is more preferred. The sheet member may be crimped and is filled so as to ensure an air passage extending in the centerline direction. In the early stage of a smoking session, the airflow resistance between the central portion 71 and the peripheral portion 72 is preferably higher in the central portion 71. This allows the peripheral portion 72 to be the main flow path for air passing through the tip portion 70. Before heating the base portion 10 or in the early stage of a smoking session, the airflow resistance of the central portion 71 and the peripheral portion 72 may be 50 mmH2O or less.

[0060] The material of the winding member 73 is not particularly limited, and known materials can be used, and the material may contain fillers such as calcium carbonate. The winding member 73 is preferably not breathable. The air permeability of the winding member 73 may be 100 C.U. or less. The low breathability of the winding member 73 allows the flow path of air passing through the tip portion 70 to be divided into the central portion 71 and the peripheral portion 72. The shape of the winding member 73 may be square or rectangular. When winding the central portion 71 into a cylindrical shape with the winding member 73, for example, an end of the winding member 73 and an end of the winding member 73 on the opposite side are overlapped by about 0.5 mm to 5 mm in the circumferential direction and joined with an adhesive member to form a cylindrical cardboard tube shape with the central portion 71 filled inside. Here, the central portion 71 is wound and held all around the winding member 73 in a compressed state. The size of the rectangular winding member 73 can be determined depending on the size of the tip portion 70.

[0061] The adhesive member that joins both ends of the winding member 73, which is wound around the entire circumference of the center portion 71, is made of a material whose adhesive strength decreases with increasing temperature, such as a hot melt adhesive. The adhesive member is preferably made of a material whose adhesive strength decreases at temperatures between 80°C and 180°C, and which allows the ends of the winding member 73 to peel away from each other. When the ends of the winding member 73 peel away from each other, the compressed state of the center portion 71 is released, the center portion 71 expands, and the peripheral portion 72 is compressed and contracts.

[0062] Fig. 4 is a diagram showing an example of a cross section of the distal end portion according to this embodiment at a later stage of a smoking session, while Fig. 3 shows a cross section at an earlier stage of a smoking session. A smoking session may refer to a period from the start to the end of a process for generating an aerosol, or may refer to a period from the start to the end of a process for heating the flavor inhalation article 1. The early stage of a smoking session may be 50% of the total duration of the smoking session from the start of the smoking session, or 30% of the total duration of the smoking session from the start of the smoking session, or the period when heating begins to commence. The latter part of the smoking session may be 50% of the total duration of the smoking session until the end of the smoking session, or 30% of the total duration of the smoking session until the end of the smoking session, or the period until heating ends.

[0063] Before heating by the heating unit 121 begins, the distal end portion 70 of the flavor inhalation article 1 is joined by an adhesive member with both ends of the winding member 73 overlapping each other, as shown in FIG. 3 , and the central portion 71 is in a compressed state. When the substrate portion 10 is heated by the heating unit 121 of the inhalation device 100, heat is transmitted to the distal end portion 70 located adjacent to the substrate portion 10, causing the temperature of the distal end portion 70 to rise. Because the temperature of the distal end portion 70 is low in the early stage of a smoking session, the adhesive strength of the adhesive member joining the two ends of the winding member 73 does not decrease. As the temperature of the distal end portion 70 increases toward the later stage of a smoking session, the adhesive strength of the adhesive member decreases. This causes the two ends of the winding member 73 to peel away from each other, releasing the compressed state of the central portion 71 and causing the central portion 71 to expand. As described above, the peripheral portion 72 is configured to easily contract in accordance with the expansion of the central portion 71, and the peripheral portion 72 contracts when the two ends of the winding member 73 peel away from each other. During the latter part of a smoking session, as shown in FIG. 4, the central part 71 expands and the peripheral part 72 contracts, resulting in a larger cross-sectional area for the central part 71 and a smaller cross-sectional area for the peripheral part 72 compared to before heating and during the earlier part of the smoking session. The expansion of the central part 71 reduces the airflow resistance, while the contraction of the peripheral part 72 increases the airflow resistance. In the example shown in FIG. 4, the expansion of the central part 71 causes both ends of the winding member 73 to be separated, but this is not limiting. Even after the expansion of the central part 71, both ends of the winding member 73 may remain overlapping.

[0064] FIG. 5 is a diagram illustrating the air flow path at tip 70 during the early stages of a smoking session. In the early stage of the smoking session, the adhesive strength of the adhesive member joining the two ends of the winding member 73 is hardly reduced, and the central portion 71 is in a compressed state. Before heating and in the early stage of the smoking session, the central portion 71 has a higher airflow resistance than the peripheral portion 72, so that, as shown by arrow 75, the air flowing in from the first side of the flavor inhalation article 1 flows into the base member 10 mainly through the peripheral portion 72.

[0065] FIG. 6 shows the air flow path at tip 70 during the latter stages of a smoking session. From the early stage of a smoking session to the later stage of a smoking session, the adhesive strength of the adhesive member joining the two ends of the winding member 73 together gradually decreases as the temperature of the tip end portion 70 rises, and the two ends of the winding member 73 peel off, releasing the compressed state of the central portion 71. As a result, the airflow resistance of the central portion 71 decreases and the airflow resistance of the peripheral portion 72 increases. Due to this change in airflow resistance, the main flow path of the air flowing in from the first side of the flavor inhalation article 1 shifts from the peripheral portion 72 to the central portion 71. 6, the central portion 71 expands and the peripheral portion 72 compresses, so that the airflow resistance of the central portion 71 becomes smaller than that of the peripheral portion 72. Therefore, in the later stage of the smoking session, the main flow path of the air flowing in from the first side of the flavor inhalation article 1 becomes the central portion 71, as shown by arrow 76. The arrows 75 and 76 shown in FIGS. 5 and 6 indicate the main flow paths of the air, and do not indicate that the air does not flow to other parts.

[0066] In the peripheral heating type flavor inhalation article 1, the aerosol source 11 of the base member 10 is disposed at a position closer to the heating unit at the radially outer side, and heat is conducted from the radially outer side to the radially inner side. Since aerosol is generated in accordance with the conduction of heat, aerosol is initially generated mainly from the radially outer side, and the temperature gradually rises in the center, and aerosol is mainly generated from the center. As described above, from the early stage of a smoking session to the later stage of a smoking session, the main flow path of the air flowing in from the first side of the flavor inhalation article 1 shifts from the radially outer side to the radially inner side, so that air can be caused to flow into the base member 10 in accordance with the radial position where aerosol is generated in the base member 10 and the amount of aerosol generated. This allows more air to flow into areas where a larger amount of aerosol is generated, thereby improving the aerosol delivery efficiency.

[0067] As described above, in the later stages of a smoking session, the airflow resistance of the central portion 71 is small and the airflow resistance of the peripheral portion 72 is large. As a result, the airflow resistance of the entire tip portion 70 increases or decreases depending on the degree of change in the airflow resistance of the central portion 71 and the peripheral portion 72. When the ventilation resistance of the entire tip portion 70 increases, it becomes difficult for air to flow into the tip portion 70. Therefore, the amount of air flowing in from the tip portion 70 gradually decreases from the early stage of the smoking session to the later stage of the smoking session. Because the user's inhalation force on the flavor inhalation article 1 is constant, when the amount of air flowing in from the tip portion 70 decreases, the amount of air flowing into the flavor inhalation article 1 through the through-holes 60 of the cooling section 20 increases. In this way, the ratio between the amount of air inflow from the tip portion 70 and the amount of air inflow from the through-holes 60 differs between the early stage of the smoking session and the later stage of the smoking session. From the early stage of the smoking session to the later stage of the smoking session, the amount of air inflow from the tip portion 70 decreases, and the amount of air inflow from the through-holes 60 increases. In this case, the amount of aerosol delivered in the later stage of the smoking session can be reduced.

[0068] On the other hand, when the ventilation resistance of the entire tip portion 70 decreases, air flows more easily into the tip portion 70. Therefore, the amount of air flowing in from the tip portion 70 gradually increases from the early stage of the smoking session to the later stage of the smoking session. Because the user's inhalation force on the flavor inhalation article 1 is constant, as the amount of air flowing in from the tip portion 70 increases, the amount of air flowing into the flavor inhalation article 1 through the through-holes 60 of the cooling section 20 decreases. In this case, the amount of aerosol delivered in the later stage of the smoking session can be increased. Due to the decrease in the amount of air flowing in from the through-holes 60, the dilution rate of the aerosol is lower in the later stage of the smoking session than in the earlier stage of the smoking session. Since the amount of aerosol delivered from the base portion 10 gradually decreases from the early stage of the smoking session to the later stage of the smoking session, the lower dilution rate can suppress fluctuations in the amount of aerosol delivered.

[0069] Note that the configuration is not limited to one in which the central portion 71 is compressed by the winding member 73. Any configuration is possible as long as the central portion 71 is held in a compressed state, and the compressed state is released as the temperature rises, causing the central portion 71 to expand. For example, a configuration may be adopted in which the central portion 71 itself is hardened in a compressed state using an adhesive member whose adhesive strength decreases as the temperature rises, and the adhesive strength of the adhesive member decreases as the temperature rises, causing the compressed state of the central portion 71 to be released. Furthermore, the material of the central portion 71 is not limited to acetate, and any suitable material may be selected as long as it is maintained in a compressed state and expands when the compressed state is released. 1, the central portion 71 and the peripheral portion 72 are configured to have the same length in the center line direction, but this is not limiting. The peripheral portion 72 may be configured to surround at least a part of the central portion 71, and for example, the central portion 71 may be configured to be longer. The tip portion 70 may have an outer wrapping paper (not shown) between the peripheral portion 72 and the tipping paper 40. The tipping paper 40 may be wound so that the base material portion 10 and the tip portion 70 are wound together as a single unit, and the length of the tipping paper 40 in the center line direction does not matter. Also, different flavorings may be added to the central portion 71 and the peripheral portion 72. This allows the smoking taste to be changed between the early and later stages of a smoking session. The amount of flavoring added to the central portion 71 may be different from that added to the peripheral portion 72. This allows the intensity of the smoking flavor to be changed between the early and later stages of a smoking session.

[0070] <First Modification> The flavor inhalation article 2 according to the first modified example has the same basic configuration as the flavor inhalation article 1. The flavor inhalation article 2 according to the first modified example includes a substrate portion 10, a cooling portion 20, a filter portion 30, and a tip portion 70, similar to the flavor inhalation article 1 shown in FIG. The flavor inhalation article 2 according to the first modification is different from the flavor inhalation article 1 in that the aerosol source of the base member 10 is separated into a first aerosol source 16 on the radially outer side and a second aerosol source 17 on the radially inner side by a sheet 15. In the first modification, the aerosol source of the base member 10 as well as the tip member 70 is separated into the radially outer side and the radially inner side, so that the air flow path can be more controlled than in the flavor inhalation article 1.

[0071] FIG. 7 is a view showing a vertical cross section of a flavor inhalation article 2 according to a first modified example. 8 is a diagram showing a cross section of the base member 10 according to the first modified example, taken along the line VIII-VIII in FIG. The flavor inhalation article 2 according to the first modification has a sheet 15 that separates the aerosol source of the base member 10 into a first aerosol source 16 on the radially outer side and a second aerosol source 17 on the radially inner side. The sheet 15 separates the flow path of air passing through the base member 10 into a radially outer side and a radially inner side, and preferably has low air permeability. The air permeability of the sheet 15 is preferably 100 C.U. or less. The first aerosol source 16 and the second aerosol source 17 are configured in the same manner as the aerosol source 11 of the flavor inhalation article 1. In the flavor inhalation article 2 according to the first modification, the air that has passed through the peripheral portion 72 of the tip portion 70 flows into the first aerosol source 16 of the substrate portion 10, and the air that has passed through the central portion 71 of the tip portion 70 flows into the second aerosol source 17 of the substrate portion 10. The radial positions of the winding member 73 of the tip portion 70 and the sheet 15 of the substrate portion 10 do not necessarily have to coincide. In this way, even in the base material portion 10, the air flow path is separated into a radially outer side and a radially inner side by the sheet 15, which prevents the air flow path in the base material portion 10 from becoming turbulent and achieves favorable delivery efficiency.

[0072] Furthermore, in the flavor inhalation article 2, as in the case of the flavor inhalation article 1, the central portion 71 of the tip portion 70 expands from the early stage of a smoking session to the later stage of the smoking session, thereby decreasing the airflow resistance, and the peripheral portion 72 contracts, thereby increasing the airflow resistance. As a result, the main flow path of the air flowing in from the tip portion 70 shifts from the radially outer side to the radially inner side, but the airflow resistance of the entire tip portion 70 may change significantly between the early stage of the smoking session and the later stage of the smoking session. Even in such a case, it is preferable that the airflow resistance of the entire flavor inhalation article 2 is constant between the early stage of the smoking session and the later stage of the smoking session. For example, consider a case where the airflow resistances of the central portion 71, peripheral portion 72, first aerosol source 16, and second aerosol source 17 are the first airflow resistance, the second airflow resistance, the third airflow resistance, and the fourth airflow resistance, respectively. However, before heating or in the early stage of a smoking session, the first airflow resistance is greater than the second airflow resistance, and the third airflow resistance is greater than the fourth airflow resistance. In this case, since air mainly flows radially outward in the early stage of a smoking session, the combined airflow resistance of the tip portion 70 and base portion 10 is the sum of the second airflow resistance and the third airflow resistance. On the other hand, since air mainly flows through the central portion in the later stage of a smoking session, the combined airflow resistance of the tip portion 70 and base portion 10 is the sum of the first airflow resistance and the fourth airflow resistance. In this case, in the flavor inhalation article 2, the first airflow resistance, the second airflow resistance, the third airflow resistance, and the fourth airflow resistance are preferably set so that the sum of the second airflow resistance and the third airflow resistance and the sum of the first airflow resistance and the fourth airflow resistance are substantially equal. Here, "substantially equal" means that the airflow resistance in the latter part of a smoking session is included within a ±10% error range of the airflow resistance in the early part of the smoking session. In this way, by separating the aerosol source of the base material 10 into the first aerosol source 16 on the radially outer side and the second aerosol source 17 on the radially inner side and differentiating the airflow resistances, the airflow resistance can be kept constant throughout one session, from the start to the end of inhalation by the user. In this case, the airflow resistance throughout the entire flavor inhalation article 2 is constant between the early and late parts of the smoking session, making it less likely that the user will feel uncomfortable throughout one session.

[0073] <Second Modification> The flavor inhalation article 3 according to the second modified example has the same basic configuration as the flavor inhalation article 1. The flavor inhalation article 3 according to the second modified example includes a substrate portion 10, a cooling portion 20, a filter portion 30, and a tip portion 70, similar to the flavor inhalation article 1 shown in FIG. The flavor inhalation article 3 according to the second modification is different from the flavor inhalation article 1 in that a plurality of through holes 61 are provided circumferentially and concentrically on the side surface of the tip portion 70. The through holes 61 are vent holes that allow air to flow from the outside to the inside of the tip portion 70. In the second modification, air flows in from the upstream end side (first side) of the tip portion 70, and also from the through holes 61 into the inside of the tip portion 70.

[0074] FIG. 9 is a view showing a vertical cross section of a flavor inhalation article 3 according to a second modified example. The flavor inhalation article 3 according to the second modified example has through holes 61 that are holes penetrating the tipping paper 40. When a plurality of concentric through holes 61 are treated as one through hole group, the number of through hole groups may be one or may be two or more. Furthermore, when the flavor suction article 3 has an outer wrapping paper (not shown) between the peripheral portion 72 and the tipping paper 40, the through-hole 61 is provided so as to penetrate the tipping paper 40 and the outer wrapping paper. In such an embodiment, the tipping paper 40 preferably has an air hole provided in a position directly above the through-hole 61 provided in the tip portion 70. When producing such a flavor suction article 3, tipping paper 40 having an air hole that overlaps with the through-hole 61 may be prepared and wrapped, but from the viewpoint of ease of production, it is preferable to produce a flavor suction article 3 without a through-hole 61 and then open holes that penetrate the tip portion 70 and the tipping paper 40 simultaneously.

[0075] In the second modified example, air also flows into the tip portion 70 through the through holes 61, making it easy to adjust the balance of the airflow resistance between the central portion 71 and the peripheral portion 72. In a case where the through holes 61 are not provided, for example, when the central portion 71 and the peripheral portion 72 are formed to have the same length in the centerline direction, it is necessary to adjust the balance of the airflow resistance between the central portion 71 and the peripheral portion 72 by adjusting the materials constituting the central portion 71 and the peripheral portion 72. In contrast, when the through holes 61 are provided, the airflow resistance of the peripheral portion 72 can be easily adjusted by adjusting the number, diameter, and position of the through holes 61 in the centerline direction. By providing the through holes 61 in the tip portion 70 in this way, it is possible to easily set a state in which the airflow resistance of the central portion 71 is higher than the airflow resistance of the peripheral portion 72.

[0076] When the tip portion 70 is provided with the through-holes 61, it is considered that even after the central portion 71 expands and the peripheral portion 72 contracts in the latter part of a smoking session, air flows in through the through-holes 61, so that the airflow resistance of the peripheral portion 72 does not become greater than the airflow resistance of the central portion 71. For this reason, it is preferable to configure the through-holes 61 so that they are closed in the latter part of a smoking session, for example, by applying glue around the through-holes 61, and the glue melts due to a rise in temperature in the latter part of the smoking session, thereby closing the through-holes 61. This makes it possible to prevent the balance of the airflow resistance between the central portion 71 and the peripheral portion 72 from being lost due to the air flowing in through the through-holes 61 when the central portion 71 expands and the peripheral portion 72 contracts in the latter part of a smoking session.

[0077] <Third Modification> The flavor inhalation article 4 according to the third modified example has the same basic configuration as the flavor inhalation article 1. The flavor inhalation article 4 according to the third modified example includes a substrate portion 10, a cooling portion 20, a filter portion 30, and a tip portion 70, similar to the flavor inhalation article 1 shown in FIG. The flavor inhalation article 4 according to the third modification differs from the flavor inhalation article 1 in that the peripheral portion 72 of the tip portion 70 includes a shrink film 74 and has a winding member 77 surrounding the peripheral portion 72. The shrink film 74 is an example of a heat-shrinkable material that shrinks when heated.

[0078] FIG. 10 is a diagram showing an example of a cross section of the tip portion 70 according to the third modified example at the early stage of a smoking session. FIG. 11 is a diagram showing an example of a cross section of the tip portion 70 according to the third modified example at a later stage of a smoking session. The tip portion 70 of the flavor inhalation article 4 according to the third modification is composed of a central portion 71 and a peripheral portion 72, and the peripheral portion 72 includes a shrink film 74. Before heating or during the early stages of a smoking session, the central portion 71 is held in a compressed state by the shrink film 74.

[0079] The shrink film 74 is made of a material that shrinks at, for example, a temperature between 80° C. and 200° C. The shrink film 74 shrinks when it receives heat from the heating unit 121 of the suction device 100. The composition of the shrink film 74 used in the tip portion 70 is not particularly limited, and may include, for example, at least one of polyethylene, polypropylene, and cellulose acetate. The shrink film 74 may be in the form of a sheet, and may be square or rectangular in shape. The shrink film 74 may be folded. In this case, a plurality of air flow paths extending in the longitudinal direction may be formed between the folded shrink film 74. 10, the peripheral portion 72 is made of a shrink film 74, and the gap between the folded portions is hollow, but this is not limiting. For example, the gap between the shrink film 74 may be filled with cellulose acetate or a sheet material.

[0080] The tip portion 70 has a winding member 77 that surrounds the peripheral portion 72, and the shrink film 74 may be adhered to the winding member 77. In the example shown in Fig. 10, the shrink film 74 is folded in an accordion-like shape and has a portion that contacts the winding member 77 and a portion that contacts the center portion 71. The portion of the shrink film 74 that contacts the winding member 77 is adhered to the winding member 77 by an adhesive member. The shrink film 74 shrinks when heated by the heating unit 121 of the inhalation device 100, but the shrink film 74 shrinks radially outward because the shrink film 74 is bonded to the winding member 77. This causes the center portion 71 to be released from its compressed state at the later stage of the smoking session, causing the center portion 71 to expand.

[0081] 10 and 11, the shrink film 74 receives heat from the heating unit 121 and shrinks radially outward. Before heating, the center portion 71 is held in a compressed state by the shrink film 74, as shown in Fig. 10. However, in the latter part of a smoking session, the shrink film 74 shrinks radially outward, releasing the compressed state of the center portion 71, causing the center portion 71 to expand, as shown in Fig. 11. In the latter part of the smoking session, as shown in Figure 11, the central part 71 expands and the peripheral part 72 contracts, and the cross-sectional area of ​​the central part 71 becomes larger and the cross-sectional area of ​​the peripheral part 72 becomes smaller compared to before heating and in the earlier part of the smoking session. The expansion of the central part 71 reduces the airflow resistance.

[0082] In the flavor inhalation article 4 according to the third modified example, the shrink film 74 hardly shrinks in the early stage of the smoking session. On the other hand, in the later stage of the smoking session, the central part 71 expands due to the shrink film 74 shrinking, and the airflow resistance of the central part 71 becomes smaller than that in the early stage of the smoking session. In this way, the airflow resistance of the central part 71 becomes smaller in the later stage of the smoking session than that in the early stage of the smoking session, and as with the other embodiments, the amount of air passing through the central part 71 can be increased from the early stage of the smoking session to the later stage of the smoking session.

[0083] In the flavor inhalation article 4 according to the third modification, the tip portion 70 may also have a winding member 73 surrounding the central portion 71. As in the flavor inhalation article 1, the winding member 73 has an end portion of the winding member 73 joined to an opposite end portion of the winding member 73 in the circumferential direction by an adhesive member. In this case, before heating and during the early stage of a smoking session, the central portion 71 of the flavor inhalation article 4 is held in a compressed state by the shrink film 74 and the winding member 73. In this way, by maintaining the compressed state of the central portion 71 not only by the shrink film 74 but also by the winding member 73, the degree of freedom in designing the peripheral portion 72 can be improved. In this case, the central portion 71 is prepared in advance in a compressed state maintained by the winding member 73, and the shrink film 74 is placed around it to manufacture the tip portion 70. This eliminates the need for a complex process of forming the tip portion 70 while maintaining the central portion 71 in a compressed state by the shrink film 74, thereby simplifying the manufacturing process.

[0084] <Summary> The present disclosure includes the following configurations. (1) a substrate that generates an aerosol when heated; an upstream portion located upstream of the base portion, The upstream portion is having a central portion held in a compressed state; The central portion expands as the temperature rises and the compressed state is relaxed. Flavor suction article. (2) a winding member wound around the entire periphery of the center portion; an adhesive member that joins both ends of the winding member together, The central portion is held in a compressed state by the winding member, and the central portion expands as the adhesive force between both ends of the winding member decreases. The flavor inhalation article according to (1). (3) The flavor inhalation article according to (2), wherein the adhesive member is made of a material that allows both ends of the winding member to peel off from each other at a temperature of 80°C or higher and 180°C or lower. (4) The flavor inhalation article according to any one of (1) to (3), wherein the central portion does not contain a plasticizer. (5) The flavor inhalation article according to any one of (1) to (4), wherein the upstream portion has a peripheral portion surrounding the outer periphery of the central portion. (6) The flavor inhalation article according to (5), wherein the peripheral portion contracts as the central portion expands. (7) The flavor inhalation article according to (5) or (6), wherein the peripheral portion comprises cellulose acetate or paper. (8) The flavor inhalation article according to any one of (1) to (7), wherein the central portion contains cellulose acetate. (9) The flavor inhalation article according to any one of (5) to (7), wherein in the early stage of a smoking session of the base material, the airflow resistance of the peripheral portion is smaller than the airflow resistance of the central portion, and in the later stage of a smoking session of the base material, the airflow resistance of the peripheral portion is larger than the airflow resistance of the central portion. (10) The flavor inhalation article according to any one of (5) to (7), wherein the peripheral portion includes a heat-shrinkable material. (11) The flavor inhalation article according to any one of (5) to (7), wherein the central portion and the peripheral portion contain cellulose acetate, and before heating of the base portion or during the early stages of a smoking session, the packing density of the cellulose acetate constituting the peripheral portion is lower than the packing density of the cellulose acetate constituting the central portion. (12) A flavor inhalation article according to any one of (1) to (11), wherein the airflow resistance of the center of the substrate part in the early stage of a smoking session is greater than the airflow resistance of the center of the substrate part in the later stage of a smoking session. (13) The flavor inhalation article according to any one of (1) to (12), wherein the base material portion includes a first aerosol source on the radially outer side, a second aerosol source on the radially inner side, and a sheet positioned between the first aerosol source and the second aerosol source. (14) a downstream portion located downstream of the base portion, The downstream portion is It has a vent that allows air to flow from the outside to the inside. A flavor inhalation article according to any one of (1) to (13). (15) The downstream portion is a filter portion through which the aerosol generated from the substrate portion passes; a cylindrical member formed between the base material portion and the filter portion, The vent is located in the tubular member. The flavor inhalation article according to (14). (16) The flavor inhalation article according to (14) or (15), wherein the ratio of the amount of air inflow from the upstream portion to the amount of air inflow from the ventilation hole in the early stage of a smoking session of the base material is different from the ratio of the amount of air inflow from the upstream portion to the amount of air inflow from the ventilation hole in the later stage of a smoking session of the base material. (17) The flavor inhalation article according to any one of (1) to (16), wherein the upstream portion has a vent hole on a side surface thereof for allowing air to flow from the outside to the inside. [Explanation of symbols]

[0085] 1, 2, 3... flavor inhalation article, 10... substrate portion, 11... aerosol source, 20... cooling portion, 30... filter portion, 31... filter, 35... wrapping paper, 40... tip paper, 50... mouthpiece segment, 60, 61... through-holes, 70... tip portion, 71... center portion, 72... peripheral portion, 73... winding member

Claims

1. a substrate that generates an aerosol when heated; an upstream portion located upstream of the base portion, The upstream portion is having a central portion held in a compressed state; The central portion expands as the temperature rises and the compressed state is relaxed. Flavor suction article.

2. a winding member wound around the entire periphery of the center portion; an adhesive member that joins both ends of the winding member together, The central portion is held in a compressed state by the winding member, and the central portion expands as the adhesive force between both ends of the winding member decreases. The flavor inhalation article according to claim 1 .

3. The flavor inhalation article according to claim 2 , wherein the adhesive member is made of a material that allows both ends of the winding member to peel off from each other at a temperature of 80° C. or higher and 180° C. or lower.

4. The flavor inhalation article according to claim 1 , wherein the core does not contain a plasticizer.

5. The flavor inhalation article according to claim 1 , wherein the upstream portion has a peripheral portion surrounding an outer periphery of the central portion.

6. The flavor inhalation article according to claim 5 , wherein the peripheral portion contracts as the central portion expands.

7. The flavor inhalation article according to claim 5 or 6, wherein the peripheral portion comprises cellulose acetate or paper.

8. The flavor inhalation article according to claim 1 , wherein the central portion contains cellulose acetate.

9. 8. The flavor inhalation article according to claim 5, wherein in the early stage of a smoking session of the base material, the airflow resistance of the peripheral portion is smaller than the airflow resistance of the central portion, and in the later stage of a smoking session of the base material, the airflow resistance of the peripheral portion is larger than the airflow resistance of the central portion.

10. The flavor inhalation article according to claim 5 , wherein the peripheral portion includes a heat-shrinkable material.

11. The flavor inhalation article according to any one of claims 5 to 7, wherein the central portion and the peripheral portion contain cellulose acetate, and before the base portion is heated or during the early stages of a smoking session, the packing density of the cellulose acetate constituting the peripheral portion is lower than the packing density of the cellulose acetate constituting the central portion.

12. The flavor inhalation article according to any one of claims 1 to 11, wherein the airflow resistance of the center of the substrate portion during the early stage of a smoking session is greater than the airflow resistance of the center of the substrate portion during the later stage of a smoking session.

13. 13. The flavor inhalation article according to claim 1, wherein the base material portion includes a first aerosol source on the radially outer side, a second aerosol source on the radially inner side, and a sheet positioned between the first aerosol source and the second aerosol source.

14. a downstream portion located downstream of the base portion, The downstream portion is It has a vent that allows air to flow from the outside to the inside. The flavor inhalation article according to any one of claims 1 to 13.

15. The downstream portion is a filter portion through which the aerosol generated from the substrate portion passes; a cylindrical member formed between the base material portion and the filter portion, The vent is located in the tubular member. The flavor inhalation article according to claim 14.

16. The flavor inhalation article according to claim 14 or 15, wherein the ratio of the amount of air inflow from the upstream portion to the amount of air inflow from the air vent in the early stage of a smoking session of the base material is different from the ratio of the amount of air inflow from the upstream portion to the amount of air inflow from the air vent in the later stage of a smoking session of the base material.

17. The flavor inhalation article according to claim 1 , wherein the upstream portion has a vent hole on a side surface thereof through which air flows from the outside to the inside.

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