EP4643669A1

EP4643669A1 - Flavor inhalation article

Info

Publication number: EP4643669A1
Application number: EP23911247.7A
Authority: EP
Inventors: Hiroshi SHIBUICHI; Tetsuya Motodamari
Original assignee: Japan Tobacco Inc
Current assignee: Japan Tobacco Inc
Priority date: 2022-12-26
Filing date: 2023-08-17
Publication date: 2025-11-05
Also published as: WO2024142463A1; EP4643675A1; KR20250114362A; WO2024142465A1; TW202508474A; KR20250114073A; CN120390592A; JPWO2024142463A1; JPWO2024142465A1; CN120712028A; JPWO2024142464A1; EP4643674A1; WO2024142464A1; CN120659554A; KR20250114363A; US20260101923A1

Abstract

The flavor inhalation article 1 includes a substrate section 10 containing an aerosol source 11, and a mouthpiece segment 50 through which the aerosol generated from the substrate section 10 passes, wherein the mouthpiece segment 50 includes a filter 31, which is a paper filter, and a restriction member 33 disposed in filter 31 and restricting the flow path of aerosol within filter 31.

Description

TECHNICAL FIELD

The present disclosure relates to a flavor inhalation article.

BACKGROUND ART

PTL 1 describes an aerosol delivery system comprising a housing with a mouthpiece having an air outlet, and a consumable unit housed within the housing, which includes a source of aerosol-generating medium and an air flow path wall that forms an air flow path passing through the source of aerosol-generating medium and terminating near the air outlet of the housing. PTL 1 indicates that the consumable unit includes at least one filter material selected from tobacco, cellulose acetate, and porous paper.

CITATION LIST

PATENT LITERATURE

[PTL 1] JP 2022-528485 A

SUMMARY OF INVENTION

TECHNICAL PROBLEM

In some cases, a paper filter is used as the filter for a flavor inhalation article, considering environmental factors.
Here, a paper filter with the same air resistance as a fiber filter composed of materials such as cellulose acetate generally has a higher aerosol filtration rate than the fiber filter. However, a paper filter in which the density is suppressed in order to achieve the same filtration rate as a fiber filter results in decreased air resistance, compromising the sensation of inhalation.
The objective of the present disclosure is to provide a flavor inhalation article that offers an appropriate sensation of inhalation to the user when a paper filter is used.

SOLUTION TO PROBLEM

To achieve this objective, the first feature of the present disclosure is a flavor inhalation article comprising a substrate section including an aerosol source, and a filter section through which aerosol generated from the substrate section passes, wherein the filter section includes a paper filter and a restriction member which is disposed in the paper filter and restricts the flow path of the aerosol within the paper filter.
The second feature is that the restriction member may be selected from a hollow member or a solid member with both ends closed in the longitudinal direction of the filter section, a capsule containing powder or liquid inside, a thread, a string, or a rope.
The third feature is that the restriction member may include at least paper.
The fourth feature is that the length of the restriction member along the longitudinal direction of the filter section may be shorter than the length of the paper filter along the longitudinal direction.
The fifth feature is that the difference between the length of the restriction member along the longitudinal direction and the length of the paper filter along the longitudinal direction may be 2 mm or more.
The sixth feature is that the restriction member may be positioned on the substrate section side within the paper filter.
The seventh feature is that the restriction member may be positioned on the downstream end side within the paper filter, and the downstream end face of the restriction member may be 2 mm or more away from the downstream end face of the paper filter.
The eighth feature is that the length of the restriction member along the longitudinal direction of the filter section may be the same as the length of the paper filter along the longitudinal direction.
The ninth feature is that the ratio of the circumference of the restriction member to the circumference of the paper filter may be 0.2 or more and less than 0.7.
The tenth feature is that the air resistance of the paper filter may be 0 [mmH₂O/10mm] or more and 100 [mmH₂O/10mm] or less.
The eleventh feature is that an aerosol modifier that modifies the aerosol may be disposed within the paper filter.
The twelfth feature is that the aerosol modifier may be a destructive capsule that releases a liquid containing fragrance components when external force is applied.
The thirteenth feature is that the aerosol modifier may be arranged in a straight line in the longitudinal direction with the restriction member and the filter section.
The fourteenth feature is that the aerosol modifier may be positioned on the downstream end side relative to the restriction member and arranged in a straight line in the longitudinal direction.
The fifteenth feature is that the aerosol modifier may be positioned on the substrate section side relative to the restriction member and arranged in a straight line in the longitudinal direction.
The sixteenth feature is that the filter section may have a cylindrical member formed in a cylindrical shape between the substrate section and the paper filter, and the circumference of the cylindrical member may be approximately the same as the circumference of the paper filter.
The seventeenth feature is that the flavor inhalation article may have a tip paper wrapped around the outer peripheral surfaces of the substrate section and the filter section, wherein the tip paper may have a vent hole formed at a position corresponding to the cylindrical member or the paper filter and allow air to flow from the outside to the inside.
The eighteenth feature is that the paper filter may be a filter filled with a sheet member.
The nineteenth feature is that the paper filter may be a filter filled with a sheet member such that voids are formed across the longitudinal direction of the filter section.
The twentieth feature is that the paper filter may be a filter with a gathered sheet member.
The twenty-first feature is that the filling density of the sheet member may be 80 mg/cm³ or more and 720 mg/cm³ or less.
The twenty-second feature is that the sheet member may have a density of 0.05 g/cm³ or more and 1.50 g/cm³ or less, and a thickness of 0.03 mm or more and 1.2 mm or less.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the first and eighteenth to twentieth features, it is possible to provide the user with an appropriate sensation of inhalation when a paper filter is used in a flavor inhalation article.
According to the second feature, it is possible to provide the user with an appropriate sensation of inhalation while suppressing the aerosol filtration rate compared to a configuration without a restriction member with both ends closed in the longitudinal direction of the filter section.
According to the third feature, the material constituting the restriction member can be made substantially the same as the paper filter.
According to the fourth feature, it is possible to make the appearance similar, in the longitudinal direction of the filter section, to one end of a paper filter used in a flavor inhalation article without a restriction member.
According to the fifth feature, it is possible to make the restriction member invisible from at least one end of the paper filter in the longitudinal direction of the filter section.
According to the sixth and seventh features, it is possible to make the restriction member invisible from the downstream end face of the paper filter, in the longitudinal direction of the filter section.
According to the eighth feature, it is possible to restrict the flow path of aerosol within the paper filter.
According to the ninth feature, it is possible to maintain the delivery amount of aerosol while providing the user with an appropriate sensation of inhalation.
According to the tenth feature, it is possible to adjust the air resistance to be equivalent to a flavor inhalation article with a filter using fibers such as cellulose acetate.
According to the eleventh feature, it is possible to modify the aerosol generated from the substrate section.
According to the twelfth feature, it is possible to impart new flavors to the aerosol.
According to the thirteenth feature, it is possible to improve the delivery efficiency of the modified aerosol compared to a configuration where the aerosol modifier is positioned at a location not corresponding to the restriction member.
According to the fourteenth feature, during inhalation, it is possible to efficiently contact the aerosol that has passed through the region where the restriction member is positioned with the aerosol modifier.
According to the fifteenth feature, during inhalation, it is possible to restrict a part of the flow path of the modified aerosol.
According to the sixteenth feature, it is possible to improve the delivery efficiency of flavor components and aerosol during inhalation.
According to the seventeenth feature, it is possible to adjust the concentration of flavor components and aerosol being inhaled.
According to the twenty-first feature, it is possible to suppress the aerosol filtration rate while providing the user with an appropriate sensation of inhalation.
According to the twenty-second feature, it is possible to make the end face of the paper filter in the longitudinal direction of the filter section have the same appearance as the end face of a paper filter without a restriction member.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 is a diagram showing a longitudinal section of a flavor inhalation article according to the first embodiment.
Figure 2 is a schematic diagram schematically showing a configuration example of an inhalation device according to the first embodiment.
Figure 3 is a diagram showing an example of the configuration of the filter section according to the first embodiment, where (A) is a cross-section of section I-I in Figure 1, and (B) is an example of the cross-section of section II-II in Figure 1.
Figure 4 is a diagram showing another example of the configuration of the filter section according to the first embodiment, where (A) is a cross-section of section I-I in Figure 1, and (B) is another example of the cross-section of section II-II in Figure 1.
Figure 5 is a diagram showing another example of the longitudinal section of the flavor inhalation article according to the first embodiment, where (A) shows a restriction member with a sharp second side, and (B) shows a longitudinal section of a flavor inhalation article with a restriction member that narrows from the first side to the second side.
Figure 6 is a diagram showing another example of the longitudinal section of the flavor inhalation article according to the first embodiment, where (A) shows a state where the restriction member is positioned on the second side within the filter, and (B) shows a state where the restriction member is positioned closer to the center within the filter.
Figure 7 is a diagram showing another example of the longitudinal section of the flavor inhalation article according to the first embodiment, where (A) shows a state where a restriction member with the same size in the centerline direction as the filter is positioned within the filter, and (B) shows a state where multiple restriction members are positioned within the filter.
Figure 8 is a diagram showing a longitudinal section of a flavor inhalation article according to the second embodiment, where (A) shows a state where the restriction member is positioned on the first side within the filter, and (B) shows a state where the restriction member is positioned on the second side within the filter.
Figure 9 is a diagram showing another example of the longitudinal section of the flavor inhalation article according to the second embodiment, where (A) shows a state where the restriction member is positioned on the first side within the filter, and (B) shows a state where the restriction member is positioned on the second side within the filter.
Figure 10 is a diagram showing a longitudinal section of a flavor inhalation article according to the third embodiment.
Figure 11 is a diagram showing a longitudinal section of a flavor inhalation article according to the fourth embodiment, where (A) shows a state where the restriction member is positioned on the first side of the aerosol modifier, and (B) shows a state where the restriction member is positioned on the second side of the aerosol modifier.
Figure 12 is a diagram showing a longitudinal section of a flavor inhalation article according to the fifth embodiment.
Figure 13 is a diagram showing another example of the longitudinal section of the flavor inhalation article according to the fifth embodiment, where (A) shows a state where the restriction member is positioned on the second side within the filter, (B) shows a state where the restriction member is positioned closer to the center within the filter, and (C) shows a state where multiple restriction members are positioned within the filter.
Figure 14 is a diagram showing a longitudinal section of a flavor inhalation article according to the sixth embodiment, where (A) shows a state where the restriction member is positioned on the first side within the filter, and (B) shows a state where the restriction member is positioned on the second side within the filter.
Figure 15 is a diagram showing a longitudinal section of a flavor inhalation article according to the sixth embodiment, where (A) shows a state where the restriction member is positioned on the first side within the filter, and (B) shows a state where the restriction member is positioned on the second side within the filter.
Figure 16 is a diagram showing a longitudinal section of a flavor inhalation article according to the seventh embodiment, where (A) shows a state where the restriction member is positioned on the first side of the aerosol modifier, (B) shows a state where the restriction member is positioned on the second side of the aerosol modifier, and (C) shows a state where the restriction member is positioned on both the first side and the second side of the aerosol modifier.

DESCRIPTION OF EMBODIMENTS

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the drawings, identical parts are indicated by identical reference signs.

Figure 1 is a diagram showing a longitudinal section of a flavor inhalation article 1 according to the first embodiment. Figure 2 is a schematic diagram schematically showing a configuration example of an inhalation device 100 according to the first embodiment.
The flavor inhalation article 1 according to the first embodiment includes a substrate section 10 and a filter section 30. Additionally, the flavor inhalation article 1 may include a cooling section 20. A mouthpiece segment 50 is a component that may be held in the mouth by the user during inhalation and, in the example of Figure 1, includes the cooling section 20 and the filter section 30. The substrate section 10 is formed in a cylindrical shape. Hereinafter, the direction of the centerline CL of the substrate section 10 may be referred to as the "centerline direction." The flavor inhalation article 1 further includes a tip paper 40 that is wrapped around the substrate section 10, the cooling section 20, and the filter section 30 arranged in order along the centerline direction, thereby integrating these components. Hereinafter, one end side in the centerline direction (the left side in Figure 1) may be referred to as the first side, and the other end side in the centerline direction (the right side in Figure 1) may be referred to as the second side. The first side is the end side that is 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 of the first side, which is the end side that the user holds in his or her mouth for inhalation, and is the downstream side in the flow of aerosol during inhalation. Additionally, a cross-section along the centerline direction is referred to as a "longitudinal section", and a cross-section cut on a plane orthogonal to the centerline direction is defined as a "cross-section".

[Usage Mode of Flavor Inhalation Article 1]

The flavor inhalation article 1 according to the first embodiment is used in a non-combustion heating-type inhalation device 100. As shown in Figure 2, the inhalation device 100 includes a power supply unit 111 that accumulates 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 information. Additionally, the inhalation device 100 includes a memory unit 114 that stores various information for the operation of the inhalation device 100, a communication unit 115 for transmitting and receiving information between the inhalation device 100 and other devices, and a control unit 116 that controls the overall operation within the inhalation device 100. Furthermore, the inhalation device 100 includes a heating unit 121 for heating the flavor inhalation article 1, a holding section 140 for holding the flavor inhalation article 1, an opening 142 that communicates the internal space 141 with the outside, and a heat insulation section 144 that prevents heat transfer from the heating unit 121 to other components of the inhalation device 100. In the inhalation device 100, inhalation by the user is performed while the flavor inhalation article 1 is held in the holding section 140.
The heating unit 121 heats the substrate section 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 arranged to cover the outer circumference of the holding section 140. When the heating unit 121 generates heat, the aerosol source 11 contained in the flavor inhalation article 1 is heated from the outer circumference of the flavor inhalation article 1. The heating unit 121 generates heat when powered by the power supply unit 111. As an example, power may be supplied when a predetermined user input is detected by the sensor unit 112. When the temperature of the flavor inhalation article 1 heated by the heating unit 121 reaches a predetermined temperature, inhalation by the user becomes possible. Thereafter, power supply may be stopped when a predetermined user input is detected by the sensor unit 112. As another example, power may be supplied, and aerosol may be generated during the period when inhalation by the user is detected by the sensor unit 112.
The heat insulation section 144 is arranged to cover at least the outer circumference of the heating unit 121. For example, the heat insulating portion 144 is configured by a vacuum insulating material or an aerogel insulating material, etc. Note that vacuum insulation material is an insulation material that minimizes heat conduction by gas by wrapping materials such as glass wool and silica (silicon powder) in a resin film, for example, and creating a high vacuum state.

[Flavor Inhalation Article 1]

The flavor inhalation article 1 is a non-combustion heating-type flavor inhalation article.
The cross-section of the flavor inhalation article 1 is substantially circular, and its circumference can be appropriately changed according to the size of the product, but is usually 16 mm or more and 27 mm or less, and preferably 21 mm or more and 23 mm or less. Note that if the cross-section is not circular, the above circumference is applied by assuming a circle having the same area as that cross-section, and the circumference of that circle is used.
The size in the centerline direction of the flavor inhalation article 1 can be appropriately changed 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.

[Substrate Section 10]

The substrate section 10 includes an aerosol source 11 that generates vapor when heated, and a wrapping paper 12 that covers the outer circumference of the aerosol source 11. Additionally, the substrate section 10 may include a tip member 13 that prevents the aerosol source 11 from falling off from the end face on the first side of the substrate section 10. The substrate section 10 is formed in a cylindrical shape by wrapping the aerosol source 11 and the tip member 13 with the wrapping paper 12. The aerosol source 11 may be tobacco-derived, such as processed products formed into granules, sheets, or powders from shredded tobacco or tobacco raw materials, for example. The aerosol source 11 may also include non-tobacco-derived materials made from plants other than tobacco (e.g., mint and herbs). As an example, the aerosol source 11 may include a fragrance. The type of fragrance is not particularly limited, but menthol is particularly preferred from the viewpoint of imparting a good flavor. These fragrances may be used alone or in combination of two or more. If the inhalation device 100 is a medical inhaler, the aerosol source 11 may include a drug for the patient to inhale. Note that the aerosol source 11 is not limited to solids and may be a liquid such as polyhydric alcohols like glycerin and propylene glycol, as well as water, for example. At least a part of the substrate section 10 is accommodated in the internal space 141 of the holding section 140 when the flavor inhalation article 1 is held in the holding section 140.
The substrate section 10, formed by wrapping the aerosol source 11 with the wrapping paper 12, preferably has a cylindrical shape that satisfies an aspect ratio of 1 or more as defined by Math. 1. $Aspect ratio = h / w$
In Math.1, w is the width of the cross-section of the substrate section 10, and h is the size in the centerline direction of the substrate section 10, 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.; in the case of a circular cross-section, the width w is the diameter; in the case of an elliptical cross-section, it is the major axis; and in the case of a polygonal or rounded polygonal cross-section, it is the diameter of the circumscribed circle or the major axis of the circumscribed ellipse. The width of the cross-section of the aerosol source 11 constituting the substrate section 10 is preferably 4 mm or more and 9 mm or less.
The size h in the centerline direction of the substrate section 10 can be appropriately changed according to the size of the product, but is usually 8 mm or more, and preferably 10 mm or more. Additionally, the size h in the centerline direction of the substrate section 10 is usually 70 mm or less, and preferably 30 mm or less.
Moreover, the ratio of the size h of the substrate section 10 to the size of the flavor inhalation article 1 in the centerline direction is not particularly restricted, but from the viewpoint of balancing delivery amount and aerosol temperature, it is usually 10% or more, preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more. Furthermore, the ratio of the size h of the substrate section 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.
The content of the aerosol source 11 in the substrate section 10 is not particularly limited, but examples include 200 mg or more and 800 mg or less, with 250 mg or more and 600 mg or less being preferred. This range is particularly suitable for a substrate section 10 with a circumference of 22 mm and a size of 20 mm in the centerline direction.
Here, the aerosol source 11 including shredded tobacco will be described. The material of the shredded tobacco included in the aerosol source 11 is not particularly limited, and known materials such as lamina and midrib can be used. Additionally, dried tobacco leaves can be pulverized to an average particle size of 20 µm or more and 200 µm or less to create a tobacco powder, which is then homogenized and sheet-processed (hereinafter simply referred to as a homogenized sheet) and shredded. Furthermore, a so-called strand type, in which a homogenized sheet with a size approximately the same as the size in the centerline direction of the substrate section 10 is shredded horizontally in the centerline direction of the substrate section 10 and filled as the aerosol source 11, may also be used.
The width of the shredded tobacco is preferably 0.5 mm or more and 2.0 mm or less for filling in the aerosol source 11.
Regarding the tobacco leaves used for producing shredded tobacco and homogenized sheets, various types of tobacco can be used. For example, yellow, burley, oriental, native varieties, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures thereof can be mentioned. For mixtures, each variety can be appropriately blended to achieve the desired flavor. Details of tobacco varieties are disclosed in "Tobacco Encyclopedia, Tobacco Research Center, March 31, 2009." There are several conventional methods for producing homogenized sheets, i.e., methods for processing pulverized tobacco leaves into homogenized sheets. The first method is to produce a paper sheet using a papermaking process. The second method involves mixing an appropriate solvent such as water with pulverized tobacco leaves to homogenize them, then thinly casting the homogenized material onto a metal plate or metal plate belt, and drying the result to produce a cast sheet. The third method involves mixing an appropriate solvent such as water with pulverized tobacco leaves to homogenize them, extruding the homogenized material into a sheet shape, and rolling the result to produce a rolled sheet. Details of the types of homogenized sheets are disclosed in "Tobacco Encyclopedia, Tobacco Research Center, March 31, 2009."
The moisture content of the aerosol source 11 can be 10% by mass or more and 15% by mass or less relative to the total amount of the aerosol source 11, with 11% by mass or more and 13% by mass or less being preferred. Such a moisture content suppresses the occurrence of roll stains and improves the winding suitability during the production of the substrate section 10.
The aerosol source 11 is not particularly limited and may include extracts and/or their components from various natural substances according to the application. Examples of extracts and/or their components include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof.
The content of extracts and/or their components in the aerosol source 11 is not particularly limited, but from the viewpoint of sufficiently generating aerosol and imparting a good flavor, is usually 5% by mass or more, preferably 10% by mass or more, relative to the total amount of the aerosol source 11. Additionally, the content of extracts and/or their components in the aerosol source 11 is usually 50% by mass or less, preferably 15% by mass or more, and 25% by mass or less.
The filling density of the aerosol source 11 is not particularly limited, but from the viewpoint of ensuring the performance of the flavor inhalation article 1 and imparting a good flavor, it is usually 250 mg/cm³ or more, preferably 300 mg/cm³ or more. Additionally, the filling density of the aerosol source 11 is usually 400 mg/cm³ or less, preferably 350 mg/cm³ or less.
The aerosol source 11 may also be composed of tobacco sheets. The number of tobacco sheets may be one or more.
In the case where the aerosol source 11 is composed of a single tobacco sheet, an example mode is a mode (a so-called gather sheet) where a tobacco sheet with one side having a size approximately the same as the size in the centerline direction of the filled object is filled in a state of being folded back multiple times horizontally in the centerline direction of the filled object. Another example mode is where a tobacco sheet with one side having a size approximately the same as the size in the centerline direction of the filled object is filled in a state of being wound in a direction orthogonal to the centerline direction of the filled object.
In the case where the aerosol source 11 is composed of two or more tobacco sheets, an example mode is where multiple tobacco sheets, each having one side with a size approximately the same as the size in the centerline direction of the filled object, are filled in a state of being wound in a direction orthogonal to the centerline direction of the filled object so that they are arranged concentrically. "Arranged concentrically" means that the centers of all the tobacco sheets are positioned at approximately the same location.
The two or more tobacco sheets may all have the same composition or physical properties, or some or all of the tobacco sheets may have different compositions or physical properties. Additionally, the thickness of each tobacco sheet may be the same or different.
There are no restrictions on the thickness of each tobacco sheet, but from the viewpoint of balancing heat transfer efficiency and strength, a thickness of 150 µm or more and 1000 µm or less is preferred, with 200 µm or more and 600 µm or less being more preferred.
The aerosol source 11 can be manufactured by preparing multiple tobacco sheets with different widths, forming a laminate that narrows from the first side to the second side, and then winding the laminate through a winding tube.
According to this manufacturing method, multiple tobacco sheets extend in the centerline direction and are arranged concentrically around the centerline CL.
In this manufacturing method, it is preferable that the laminate is prepared so that a non-contact portion is formed between adjacent tobacco sheets after winding. If there is a non-contact portion (gap) where the tobacco sheets do not contact each other between multiple tobacco sheets, it is possible to secure a flavor flow path and enhance the delivery efficiency of flavor components. On the other hand, since heat from the heating unit 121 can be transferred to the outer tobacco sheets through the contact portions of multiple tobacco sheets, high heat transfer efficiency can be ensured.
To provide a non-contact portion between multiple tobacco sheets, for example, methods such as using embossed tobacco sheets, laminating without bonding the entire surface of adjacent tobacco sheets, bonding part of adjacent tobacco sheets, or lightly bonding the entire surface or part of adjacent tobacco sheets so that they peel off after winding can be used to prepare the laminate.
When preparing the substrate section 10 including the wrapping paper 12, the wrapping paper 12 may be placed on the end face of the first side of the laminate.
Tobacco sheets can be appropriately manufactured by known methods such as papermaking, slurry, rolling, etc. Note that the previously mentioned homogenized sheet can also be used.
In the case of papermaking, the homogenized sheet can be manufactured by a method including the following steps. 1) Dried tobacco leaf is coarsely ground, extracted with water and then separated into water extract and residue. 2) The water extract is concentrated by vacuum drying. 3) Pulp is added to the residue, the materials are fiberized in a refiner and then formed into paper. 4) The concentrated water extract is added to a sheet formed from the paper and dried to form a tobacco sheet. In this case, a step of removing some of the components such as nitrosamine may also be added (see JP 2004-510422 A ).
In the case of the slurry method, the homogenized sheet can be manufactured by a method including the following steps. 1) Water, pulp, and binder are mixed with crushed tobacco leaves. 2) The mixture is spread thinly (cast) and dry. In this case, a step of irradiating the slurry in which the crushed tobacco leaves are mixed with water, pulp, and binder with ultraviolet or X-rays to remove some components such as nitrosamines may be added.
Additionally, as described in WO 2014/104078 A1 , a nonwoven tobacco sheet manufactured by a method including the following steps can also be used. 1) Granular tobacco leaves are mixed with a binder. 2) The mixture is sandwiched with nonwoven fabric. 3) The laminate is formed into a fixed shape by heat welding to obtain a nonwoven tobacco sheet.
The types of tobacco leaves used as raw materials in each of the above methods can be the same as those described for the aerosol source 11 including shredded tobacco.
The composition of the tobacco sheet is not particularly limited, but for example, the content of tobacco raw material (tobacco leaves) is preferably 50% by mass or more and 95% by mass or less relative to the total mass of the tobacco sheet. The tobacco sheet may also include a binder, and examples of such binders include guar gum, xanthan gum, carboxymethyl cellulose, sodium salt of carboxymethyl cellulose, etc. 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 comprise other additives. Examples of other additives include fillers such as pulp.
The composition of the wrapping paper 12 used in the substrate section 10 is not particularly restricted and can be of a general type, for example, one having pulp as the main component. In addition to being made from wood pulp such as softwood pulp and hardwood pulp, the pulp can also be made by mixing non-wood pulp commonly used for wrapping paper 12 in tobacco products, such as flax pulp, hemp pulp, sisal pulp, esparto, etc.
Types of pulp include chemical pulp made by kraft pulping, acid, neutral, or alkaline sulfite pulping, soda pulping, etc., and groundwood pulp, chemigroundwood pulp, and thermomechanical pulp, etc.
Using pulp, the wrapping paper 12 is manufactured by adjusting and homogenizing the formation during the papermaking process using a Fourdrinier machine, cylinder machine, or twin-wire machine. If necessary, a wet strength agent can be added to impart water resistance to the wrapping paper 12, or a sizing agent can be added to adjust the printability of the wrapping paper 12. Furthermore, papermaking additives such as sulfuric acid bands, various anionic, cationic, nonionic, or amphoteric retention aids, drainage aids, and paper strength agents, as well as papermaking additives such as dyes, pH adjusters, defoamers, pitch control agents, and slime control agents can be added.
The basis weight of the base paper for wrapping paper 12 is usually 20 gsm or more, preferably 25 gsm or more. On the other hand, the basis weight is usually 65 gsm or less, preferably 50 gsm or less, and more preferably 45 gsm or less.
The thickness of the wrapping paper 12 is not particularly limited, but from the viewpoint of rigidity, breathability, and ease of adjustment during papermaking, is usually 10 µm or more, preferably 20 µm or more, and more preferably 30 µm or more. Additionally, the thickness of the wrapping paper 12 is usually 100 µm or less, preferably 75 µm or less, and more preferably 50 µm or less.
The shape of the wrapping paper 12 can be square or rectangular.
When used as wrapping paper 12 to wrap the aerosol source 11 and the tip member 13, the length of one side can be about 8 mm or more and 70 mm or less, and the length of the other side can be 15 mm or more and 28 mm or less, with a preferred length of 22 mm or more and 24 mm or less, and more preferably about 23 mm. When wrapping the aerosol source 11 cylindrically with the wrapping paper 12, for example, in the circumferential direction, the ends of the wrapping paper 12 can be overlapped by about 2 mm and glued to form a cylindrical paper tube shape, with the aerosol source 11 filled inside. The size of the rectangular wrapping paper 12 can be determined based on the size of the substrate section 10.
In addition to the above pulp, the wrapping paper 12 may include fillers. The content of fillers can be 10% by mass or more and 60% by mass or less relative to the total mass of the wrapping paper 12, with 15% by mass or more and 45% by mass or less being preferred.
In the preferred basis weight range of the wrapping paper 12 (25 gsm or more and 45 gsm or less), it is preferred that the filler content is 15% by mass or more and 45% by mass or less.
Furthermore, when the basis weight is 25 gsm or more and 35 gsm or less, it is preferred that the filler content is 15% by mass or more and 45% by mass or less, and when the basis weight is 35 gsm or more and 45 gsm or less, it is preferred that the filler content is 25% by mass or more and 45% by mass or less.
Fillers such as calcium carbonate, titanium dioxide, and kaolin can be used, but calcium carbonate is preferred from the viewpoint of enhancing flavor and whiteness.
Various additives other than base paper and fillers may be added to the wrapping paper 12, such as water resistance enhancers to improve water resistance. Water resistance enhancers 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.
Additives such as paper strength enhancers may also be added, including polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, and polyvinyl alcohol. In particular, it is known that using a very small amount of oxidized starch can improve air permeability (see JA 2017-218699 A).
The wrapping paper 12 may have a coating agent added to at least one of its two surfaces, the front and back. There are no particular restrictions on the coating agent, but a coating agent that can form a film on the surface and reduce the permeability of liquids is preferred. Examples include polysaccharides such as alginic acid and its salts (e.g., sodium salt), pectin, cellulose derivatives such as ethyl cellulose, methyl cellulose, carboxymethyl cellulose, nitrocellulose, and starch and its derivatives (e.g., ether derivatives such as carboxymethyl starch, hydroxyalkyl starch, and cationic starch, and ester derivatives such as acetate starch, phosphate starch, and octenyl succinate starch).

[Tip Paper 40]

The tip paper 40 is wrapped around the outer peripheral surfaces of the substrate section 10, the cooling section 20, and the filter section 30.
The shape of the tip paper 40 is not particularly restricted and can be, for example, square or rectangular.
The basis weight of the tip paper 40 is not particularly restricted, 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 tip paper 40 is not particularly restricted, but is usually 0 Coresta units or more and 30,000 Coresta units or less, preferably more than 0 Coresta units and 10,000 Coresta units or less. Here, "air permeability" is a value measured in accordance with ISO 2965:2009, expressed as the flow rate (cm³) of gas passing through an area of 1 cm² per minute when the differential pressure on both sides of the paper is 1 kPa. One Coresta unit (1 Coresta unit, 1 C.U.) is cm³/(min·cm²) at 1 kPa.
The composition of the tip paper 40 is not particularly restricted and can be of a general type, for example, one having pulp as the main component. In addition to being made from wood pulp such as softwood pulp and hardwood pulp, the pulp can also be made by mixing non-wood pulp commonly used for wrapping paper in tobacco products, such as flax pulp, hemp pulp, sisal pulp, esparto, etc. These pulps can be used alone or in combination of multiple types in any ratio.
Types of pulp include chemical pulp made by kraft pulping, acid, neutral, or alkaline sulfite pulping, soda pulping, etc., and groundwood pulp, chemigroundwood pulp, or thermomechanical pulp, etc. Note that the tip paper 40 can be manufactured by the above-mentioned manufacturing methods or commercial products can be used.
The tip paper 40 may include fillers in addition to the aforementioned materials, such as metal carbonates like calcium carbonate and magnesium carbonate, metal oxides like titanium dioxide and aluminum oxide, metal sulfates like barium sulfate and calcium sulfate, metal sulfides like zinc sulfide, quartz, kaolin, talc, diatomaceous earth, gypsum, etc., with calcium carbonate being preferred from the viewpoint of improving whiteness, opacity, and heating rate. These fillers can be used alone or in combination of two or more.
In addition to the aforementioned materials and fillers, various additives may be added to the tip paper 40, such as water resistance enhancers to improve water resistance. Water resistance enhancers 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.
The tip paper 40 may have a coating agent added to at least one of the two surfaces thereof, the front and back. There are no particular restrictions on the coating agent, but a coating agent that can form a film on the surface and reduce the permeability of liquids is preferred.
A portion of the outer surface of the tip paper 40 may be coated with a lip release material. The lip release material is designed to facilitate easy separation without substantial adhesion between the lips and the tip paper 40 when the user holds the filter section 30 of the flavor inhalation article 1 in their mouth. The lip release material may include, for example, ethyl cellulose, methyl cellulose, or nitrocellulose. For instance, the outer surface of the tip paper 40 may be coated with a lip release material by applying an ethyl cellulose-based or methyl cellulose-based ink.

[Cooling Section 20]

The cooling section 20 is positioned adjacent to the substrate section 10 and the filter section 30 and is formed into a part with a hollow (cavity) cross-section such as a cylinder by wrapping a sheet 21. The cooling section 20 cools the vapor generated by heating the substrate section 10 to produce aerosol.
The cross-section of the cooling section 20 is substantially circular, and its circumference can be appropriately adjusted according to the size of the product, but it is preferably approximately the same as the circumference of the filter 31, which will be described later. Note that if the cross-section is not circular, the above circumference is applied by assuming a circle having the same area as that cross-section, and the circumference of that circle is used.
The size of the cooling section 20 in the centerline direction can be appropriately adjusted according to the size of the product, but it is usually 5 mm or more, preferably 10 mm or more, and more preferably 15 mm or more. Additionally, 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. Furthermore, it is preferred that the size of the cooling section 20 in the centerline direction satisfies any combination of the above lower and upper limits. By setting the size of the cooling section 20 in the centerline direction to be above the aforementioned lower limit, sufficient cooling effect can be ensured to obtain a good flavor, and by setting it to be below the aforementioned upper limit, loss due to vapor and aerosol adhering to the sheet 21 can be suppressed.
For example, the cooling section 20 is a paper tube formed by wrapping a sheet 21 made of paper.
Specifically, the cooling section 20 is a spiral paper tube formed by laminating multiple sheets 21, at least including paper, and winding them spirally. In the manufacturing method of the spiral paper tube, it is possible to easily form a paper tube with a circular cross-section. By adopting a spiral paper tube for the cooling section 20, the area of the cooling section 20 can be reduced while improving the strength of the cooling section 20. Additionally, by laminating sheet members containing fragrance components, flavor components, tobacco powder, etc., with paper, new aromatic flavors can be imparted to the aerosol.
Alternatively, the cooling section 20 may be a straight paper tube, which is a paper tube formed by wrapping paper in multiple layers in a cylindrical shape. In the manufacturing method of the straight paper tube, compared to the manufacturing method of the spiral paper tube, the amount of glue used for attaching the paper can be reduced.
Furthermore, the cooling section 20 may be a paper tube formed by laminating multiple sheets 21, at least including paper. By laminating multiple sheets 21, the strength of the cooling section 20 can be maintained even when the basis weight of each sheet 21 is small.
The thickness of the sheet 21 is not particularly restricted and may be, for example, 50 µm or more and 500 µm or less, and may also be 100 µm or more and 250 µm or less. The material of the sheet 21 is not particularly restricted and may be, for example, one with pulp as the main component, or one with polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, cellulose acetate, and aluminum foil as the main component, or any combination thereof.
The cooling section 20 is a part formed by wrapping the sheet 21, but is an example of a cylindrical member formed in a cylindrical shape, and it is not limited to this configuration as long as the cross-section is hollow. The cooling section 20 may be formed by a tube of synthetic resin or the like that already has a hollow cross-section.
The cooling section 20 is provided with multiple through-holes 60 (also referred to as "ventilation filters (Vf)" in this technical field) in the circumferential direction and concentrically. The through-holes 60 are holes that penetrate the sheet 21. The shape of the holes can be exemplified as polygonal, rounded polygonal, circular, elliptical, etc. The through-holes 60 exist in a region where air can flow in from outside the flavor inhalation article 1, in other words, in a region that protrudes from the opening 142 when the flavor inhalation article 1 is held in the holding section 140 of the inhalation device 100.
The presence of the through-holes 60 allows for the adjustment of the concentration of flavor components and aerosol being inhaled. Additionally, the presence of multiple through-holes 60 allows air to flow into the interior of the cooling section 20 from the outside during inhalation, lowering the temperature of the vapor and air flowing in from the substrate section 10. Furthermore, by positioning the through-holes 60 at a location 4 mm or more from the boundary between the cooling section 20 and the filter section 30 in the direction of the cooling section 20, not only can the cooling capacity be improved, but the retention of the product generated by heating within the cooling section 20 can be suppressed, thereby improving the delivery amount of the product.
Note that when the substrate section 10 is heated, the vapor generated using the aerosol as a condensation nucleus can come into contact with air from the outside, causing the temperature to drop and liquefy, thereby promoting the generation of aerosol.
When treating multiple through-holes 60 that exist concentrically in the cooling section 20 as one group of through-holes, there may be one group of through-holes, or there may be two or more. When there are two or more groups of through-holes, from the perspective of improving the delivery amount of components generated by heating, it is preferable not to provide a group of through-holes in the region less than 4 mm from the boundary between the cooling section 20 and the filter section 30 in the direction of the cooling section 20.
Additionally, when the flavor inhalation article 1 is in a form where the substrate section 10, the cooling section 20, and the filter section 30 are wrapped with the tip paper 40, it is preferable that the tip paper 40 is provided with a vent hole directly above the through-hole 60 provided in the cooling section 20. When manufacturing such a flavor inhalation article 1, a tip paper 40 with a vent hole overlapping with the through-hole 60 may be prepared and wrapped, but from the perspective of ease of manufacturing, it is preferable to first produce a flavor inhalation article 1 without a through-hole 60, and then create a hole that penetrates both the cooling section 20 and the tip paper 40 simultaneously.
The region where the through-hole 60 is located is not particularly restricted as long as it is 4 mm or more from the boundary between the cooling section 20 and the filter section 30 in the direction of the cooling section 20, from the perspective of improving the delivery of the product generated by heating. However, from the perspective of further improving the delivery of the product, it is preferable that the region is 4.5 mm or more, more preferably 5 mm or more, and even more preferably 5.5 mm or more. Additionally, from the perspective of ensuring the cooling function, it is preferable that the region where the through-hole 60 is located is 15 mm or less from the boundary between the cooling section 20 and the filter section 30, more preferably 10 mm or less, and even more preferably 7 mm or less.
Furthermore, considering the boundary between the cooling section 20 and the substrate section 10 as a reference, when the size of the cooling section 20 in the centerline direction is 20 mm or more, it is preferable that the region where the through-hole 60 is located is 5 mm or more from the boundary between the cooling section 20 and the substrate section 10 in the direction of the cooling section 20, more preferably 10 mm or more, and even more preferably 13 mm or more, from the perspective of ensuring the cooling function. Additionally, from the perspective of improving the delivery of the product generated by heating, it is preferable that the region where the through-hole 60 is located is 16 mm or less from the boundary between the cooling section 20 and the substrate section 10, more preferably 15.5 mm or less, even more preferably 15 mm or less, and particularly preferably 14.5 mm or less.
The through-hole 60 is provided such that the air inflow ratio from the through-hole 60 when inhaled at 17.5 ml/sec with an automatic smoking machine is 10% by volume or more and 90% by volume or less. This "air inflow ratio" is the volume ratio of air flowing in from the through-hole 60 when the ratio of air inhaled from the mouthpiece end is set to 100% by volume. The air inflow ratio 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 ratios can be achieved by selecting, for example, the number of through-holes 60 per group of through-holes from a range of 5 to 50, and selecting the diameter of the through-holes 60 from a range of 0.1 mm to 0.5 mm, and by the combination of these selections.
The air inflow ratio can be measured using a wrapping quality measuring device (SODIMAX D74/SODIM manufactured by S.A.S) in accordance with ISO 9512.

[Filter Section 30]

Figure 3 is a diagram showing an example of the configuration of the filter section 30 according to the first embodiment, where (A) is a cross-section of section I-I in Figure 1, and (B) is an example of the cross-section of section II-II in Figure 1. Figure 4 is a diagram showing another example of the configuration of the filter section 30 according to the first embodiment, where (A) is a cross-section of section I-I in Figure 1, and (B) is another example of the cross-section of section II-II in Figure 1.
The filter section 30 is formed in a columnar shape with a size in the centerline direction larger than the width of the cross-section. Therefore, the filter section 30 is arranged so that the longitudinal direction is in the centerline direction.
The filter section 30 includes a filter 31 through which aerosol passes, a restriction member 33 that restricts the flow path of aerosol within the filter 31, and a winding paper 35 that exists between the filter 31 and the tip paper 40 and is wrapped around the outer peripheral surface of the filter 31. The filter section 30 is connected (linked) to the cooling section 20 by being wrapped together with the cooling section 20 using the tip paper 40. Note that the winding paper 35 may not be included.
The form of the winding paper 35 is not particularly restricted and may include seams containing one or more rows of adhesive. The adhesive may include hot melt adhesive, and the hot melt adhesive may include polyvinyl alcohol. Additionally, when the filter section 30 consists of two or more members, it is preferable to wrap each of these members with winding paper and then further wrap them together with another winding paper.
The material of the winding paper 35 is not particularly restricted and known materials can be used, and it may include fillers such as calcium carbonate.
The thickness of the winding paper 35 is not particularly restricted, usually being 20 µm or more and 140 µm or less, preferably 30 µm or more and 130 µm or less, and more preferably 30 µm or more and 120 µm or less.
The basis weight of the winding paper 35 is not particularly restricted, usually being 20 gsm or more and 100 gsm or less, preferably 22 gsm or more and 95 gsm or less, and more preferably 23 gsm or more and 90 gsm or less.
The air permeability of the winding paper 35 is not particularly restricted, but is usually 0 Coresta units or more and 30,000 Coresta units or less, preferably more than 0 Coresta units and 10,000 Coresta units or less.
Additionally, the winding paper 35 may or may not be coated, but from the perspective of imparting functions other than strength and structural rigidity, it is preferable to be coated with a desired material.
The cross-section of the filter 31 in the filter section 30 is substantially circular, and the circumference can be appropriately adjusted according to the size of the product, but may be 22 mm or more and 25 mm or less. Note that if the cross-section is not circular, the above circumference is applied by assuming a circle having the same area as that cross-section, and the circumference of that circle is used.
The size of the filter section 30 in the centerline direction can be appropriately adjusted according to the size of the product, but it is usually 5.0 mm or more and 30.0 mm or less, preferably 12.5 mm or more and 27.5 mm or less, and more preferably 15.0 mm or more and 25.0 mm or less.
The air resistance per 10 mm in the centerline direction of the filter section 30 is not particularly restricted, but is usually 0 mmH₂O or more and 100 mmH₂O or less, preferably 10 mmH₂O or more and 80 mmH₂O or less, and more preferably 10 mmH₂O or more and 50 mmH₂O or less.
The air resistance is measured according to the ISO standard method (ISO 6565), for example, using a filter air resistance measuring device manufactured by Cerulean. The air resistance of the filter section 30 refers to the pressure difference between the first side and the second side when a predetermined air flow rate (17.5 cc/min) is passed from the first side to the second side in a state where air does not permeate through the side surface of the filter section 30. The unit is generally expressed in mmH₂O.
The filter 31 is a so-called paper filter, and during inhalation, aerosol passes through the filter 31 in the centerline direction. The filter 31 is a paper filter in which voids 31b are formed as channels through which aerosol can pass. For example, the filter 31 is a paper filter formed by filling and molding a sheet member 31a. Specifically, the filter 31 is a paper filter formed by filling and molding a sheet member 31a to secure a passage path for aerosol extending in the centerline direction.
The filling density of the sheet member 31a is not particularly restricted, but from the perspective of balancing air resistance and filtration rate, is usually 80 mg/cm³ or more and 720 mg/cm³ or less. As shown in Figure 3(A), the filling density of the sheet member 31a in the region where the restriction member 33 is not disposed is preferably 80 mg/cm³ or more and 380 mg/cm³ or less, and more preferably 150 mg/cm³ or more and 240 mg/cm³ or less. Additionally, as shown in Figure 3(B), the filling density of the sheet member 31a in the region where the restriction member 33 is disposed is preferably 105 mg/cm³ or more and 720 mg/cm³ or less, and more preferably 170 mg/cm³ or more and 480 mg/cm³ or less.
Note that the filling density of the sheet member 31a is an example of the density of the filter 31.
The density of the sheet member 31a itself is not particularly restricted, but from the perspective of balancing the filtration capacity and air resistance of the filter 31, the lower limit is preferably 0.05 g/cm³ or more, more preferably 0.5 g/cm³ or more, and the upper limit is preferably 1.50 g/cm³ or less. Additionally, it is preferred that the density of the sheet member 31a itself satisfies any combination of the above lower and upper limits. The higher the density of the sheet member 31a, the fewer gaps there are between the fibers of the sheet member 31a, reducing the amount of aerosol that enters the gaps between the fibers of the sheet member 31a.
The thickness of the sheet member 31a is not particularly restricted, but from the perspective of balancing the filtration capacity and air resistance of the filter 31, the lower limit is preferably 0.03 mm or more, more preferably 0.05 mm or more, and the upper limit is preferably 1.20 mm or less, more preferably 0.5 mm or less. Additionally, it is preferred that the thickness of the sheet member 31a satisfies any combination of the above lower and upper limits.
Furthermore, when the sheet member 31a has a density of 0.05 g/cm³ or more and 1.50 g/cm³ or less and a thickness of 0.03 mm or more and 1.2 mm or less, it is possible to prevent the restriction member 33, which is smaller in the centerline direction than the filter 31, from being visible from the end face of the filter 31. Specifically, it is possible to make the end face of the filter 31 in the longitudinal direction of the filter section 30 appear similar to the end face of the filter 31 when the restriction member 33 is not present.
The material of the sheet member 31a is not particularly restricted as long as it can realize the general functions of a filter, but it is preferably paper or nonwoven fabric with pulp as the main component, and paper is more preferred. Additionally, materials such as polymer sheets or metal sheets may be used for the sheet member 31a. Note that the general functions of a filter include, for example, adjusting the amount of air mixed during aerosol inhalation, reducing flavor, and reducing nicotine and tar, but it is not necessary to have all of these functions. Furthermore, in the non-combustion heating-type flavor inhalation article 1, which tends to have fewer generated components and a lower filling rate of the aerosol source 11 compared to cigarette products, it is also an important function to prevent the detachment of components contained within the flavor inhalation article 1 while suppressing the filtration function.
In this embodiment, the filter 31 is formed by a sheet member 31a that is folded or provided with wrinkles or gathers, and is filled to secure a passage path for aerosol extending in the centerline direction. Specifically, as shown in Figure 3(A), the filter 31 is a paper filter in which the sheet member 31a is filled so that voids 31b are formed across the longitudinal direction of the filter section 30, and the sheet member 31a is a gathered paper filter. Here, "gathered" means that the sheet member is filled in a state of being folded back multiple times horizontally in the centerline direction of the filter 31.
The sheet member 31a may be a single sheet or two or more sheets. Additionally, folds or pleats are not necessary as long as a passage path for aerosol extending in the centerline direction is secured. Specifically, as shown in Figure 4(A), the filter 31 may be a paper filter filled with strip-shaped sheet members 31a.
By crimping the entire sheet member 31a, voids 31b can be efficiently formed in the filter 31. Crimping is a process of providing wrinkles on the sheet. For example, by passing the sheet member 31a to be processed between a pair of rollers having multiple protrusions on the surface, wrinkles extending orthogonally to the sheet transport direction can be provided on both the front and back surfaces of the sheet member 31a.
Note that the filter 31 is not limited to the configuration of this embodiment and may be any paper filter formed from the same material as the sheet member 31a. Specifically, the filter 31 may be a paper filter formed from the aforementioned material, and does not need to be formed by filling the sheet member 31a. For example, the filter 31 may be a paper filter formed by filling and molding string-like or spherical members made of the aforementioned material.
The restriction member 33 is a member that is less permeable to aerosol than the filter 31, or a member that does not allow aerosol to pass through within the filter 31. In other words, within the restriction member 33 disposed in the filter 31, aerosol is less likely to pass through or does not pass through compared to the voids 31b.
By restricting the flow path of aerosol within the filter 31 using the restriction member 33, the air resistance during inhalation can be adjusted. Specifically, by restricting the flow path of aerosol within the filter 31 using the restriction member 33, it is possible to achieve the same air resistance as a fiber filter constructed using materials such as cellulose acetate, even with a filter 31, which is a paper filter, with a reduced density to achieve the same filtration rate as a fiber filter. In other words, by restricting the flow path of aerosol within the filter 31 using the restriction member 33, it is possible to achieve both the same air resistance and aerosol filtration rate as a fiber filter.
By restricting the flow path of aerosol within the filter 31 using the restriction member 33, the sensation of inhalation experienced by the user can be adjusted. Specifically, by restricting the flow path of aerosol within the filter 31 using the restriction member 33, it is possible to adjust the resistance felt by the user during inhalation and the concentration of the aerosol, even with the filter 31, which is a paper filter. Additionally, even with the filter 31, which is a paper filter, by adjusting the resistance felt by the user in the throat during inhalation and the concentration of the aerosol using the restriction member 33, the variety of flavor inhalation articles can be increased.
Additionally, the restriction member 33 disposed within the filter 31, as will be described in detail later with reference to Figure 10, may restrict the flow path of aerosol within the filter 31 and may also modify the aerosol. "Modification" refers to altering or removing some components contained in the generated aerosol or adding new components that affect flavor to the aerosol inhaled by the user.
Note that the restriction member 33 may be one or more. Specifically, as shown in Figure 3(B), one restriction member 33 may be disposed within the filter 31, or as shown in Figure 4(B), multiple restriction members 33 may be disposed within the filter 31.
For example, the restriction member 33 may be selected from a hollow member with both ends closed in the centerline direction, a solid member, a capsule containing powder or liquid, thread, string, or rope. Additionally, the restriction member 33 may be a hollow member with one end closed on the first side in the centerline direction.
A "hollow member with both ends closed in the centerline direction" is a member with a space enclosed by an inner surface and a hollow cross-section. By making the restriction member 33 a hollow member, the weight of the flavor inhalation article 1 can be reduced compared to when a solid member is used. Additionally, when the restriction member 33 is a hollow member, the thickness of the side surface of this hollow member is not particularly restricted, usually being 50 µm or more and 500 µm or less, and preferably 100 µm or more and 250 µm or less. For example, when sheet members overlap, the total thickness of the overlapped sheet members should be within the above range. By setting the thickness of the side surface of the hollow member within the above range, deformation of the restriction member 33 due to pressure from external sources such as the filter 31 can be suppressed.
A "solid member" is a member that forms a definite shape with a solid cross-section using the same or similar materials. By making the restriction member 33 a solid member, the content of the material used for the restriction member 33 in the flavor inhalation article 1 can be increased compared to a hollow member, enhancing the effects attributed to this material. Additionally, a "capsule containing powder or liquid" is a destructive capsule that releases powdered or liquid contents when external force is applied. By making the restriction member 33 a capsule, the user can control whether or not to restrict the flow path of aerosol within the filter 31.
Additionally, by making the restriction member 33 a thread, the difficulty of aerosol passing through the restriction member 33 can be adjusted according to the gaps between the threads or fibers or the number of threads. Furthermore, by making the restriction member 33 a string, the number of thicker strings used can be reduced compared to threads, making manufacturing easier. Additionally, by making the restriction member 33 a rope, manufacturing becomes even easier.
The shape of the outer periphery of the restriction member 33 in the cross-section can be appropriately changed according to the shape of the product, but examples include circular, elliptical, polygonal, and rounded polygonal shapes.
Additionally, the ratio of the area of the restriction member 33 to the area of the filter section 30 in the cross-section is not particularly restricted, but can be 15% or more and 50% or less, with 20% or more and 40% or less being preferred. If multiple restriction members 33 are disposed within the filter 31, it is preferred that the total area ratio of the multiple restriction members 33 to the area of the filter section 30 in one cross-section is within the above range.
If the outer periphery of the restriction member 33 in the cross-section is substantially circular, the circumference can be appropriately adjusted according to the size of the product, but is usually 6 mm or more and 15 mm or less, and more preferably 9 mm or more and 11 mm or less. Additionally, the ratio of the circumference of the restriction member 33 to the circumference of the filter 31 is usually 0.20 or more and less than 0.70, and more preferably 0.35 or more and 0.50 or less. Note that if the cross-section is not circular, the above circumference is applied by assuming a circle having the same area as that cross-section, and the circumference of that circle is used.
The size of the restriction member 33 in the centerline direction can be appropriately changed according to the size of the product, but is preferably not larger than the size of the filter 31 in the centerline direction. For example, the length of the restriction member 33 along the longitudinal direction of the filter section 30 is preferably shorter than the length of the filter 31 along the longitudinal direction of the filter section 30.
Additionally, when the size of the restriction member 33 in the centerline direction is smaller than the size of the filter 31 in the centerline direction, it is preferred that the difference between the size of the restriction member 33 in the centerline direction and the size of the filter 31 in the centerline direction is 2 mm or more. By making the size of the restriction member 33 smaller than the size of the filter 31 in the centerline direction, the restriction member 33 does not protrude from at least one end face of the filter 31, and the end face of the filter 31 can appear similar to the end face of the filter 31 used in a flavor inhalation article without the restriction member 33. By making the restriction member 33 at least 2 mm smaller than the filter 31 in the centerline direction, the restriction member 33 can be made invisible from at least one end of the filter 31.
In the example shown in Figure 1, the shape of the restriction member 33 is cylindrical or columnar. Specifically, the size in the direction orthogonal to the centerline direction of the restriction member 33 is smaller than the size in the centerline direction of the restriction member 33. Additionally, the shape of the restriction member 33 is not limited to the example shown in Figure 1, and may be spherical with the same size in the direction orthogonal to the centerline direction as the size in the centerline direction of the restriction member 33.
Here, a specific example of the configuration of the restriction member 33 will be described.
For example, the restriction member 33 is a member formed into a cylindrical or columnar shape by wrapping a sheet member containing the same material as the sheet member 31a constituting the filter 31, and the ends in the centerline direction are closed by the sheet member. Specifically, the restriction member 33 is a member formed by wrapping paper. This allows the material constituting the restriction member 33 to be substantially the same as the filter 31.
The restriction member 33 is a member with both ends closed in the centerline direction of a spiral paper tube, which is a paper tube formed by laminating multiple sheet members, at least including paper, and winding them spirally. In the manufacturing method of the spiral paper tube, it is possible to easily form a paper tube with a circular cross-section. By adopting a spiral paper tube for the restriction member 33, the ratio of the area of the restriction member 33 to the area of the filter section 30 can be reduced while improving the strength of the restriction member 33. Additionally, by laminating sheet members containing fragrance components, flavor components, tobacco powder, etc., with paper, new aromatic flavors can be imparted to the aerosol.
Alternatively, the restriction member 33 may be a member with both ends closed in the centerline direction of a straight paper tube, which is a paper tube formed by wrapping paper in multiple layers in a cylindrical shape. In the manufacturing method of the straight paper tube, compared to the manufacturing method of the spiral paper tube, the amount of glue used for attaching the paper can be reduced.
Furthermore, the restriction member 33 may be a member with both ends closed in the centerline direction of a paper tube formed by laminating multiple sheet members, at least including paper. By laminating multiple sheet members, the strength of the restriction member 33 can be maintained even when the basis weight of each sheet member is small.
In the examples described above, the restriction member 33 is a member formed by wrapping paper, but is not limited to this configuration as long as the configuration is less permeable to aerosol than the filter 31. The restriction member 33 may also be a member formed by wrapping sheets such as woven or nonwoven fabrics of various fibers, or it may be a member formed by filling and molding materials such as woven or nonwoven fabrics, paper, resin, fiber, inorganic adsorbents, polymer porous bodies, rubber, metal, gelling agents, etc. As for the material of the restriction member 33, examples include pulp, cotton, wool, polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, aluminum, cellulose acetate, activated carbon, sepiolite, palygorskite, zeolite, activated alumina, sepiolite, silica gel, activated clay, vermiculite, diatomaceous earth, ion exchange resins, latex, silicone, aluminum, and any known natural gelling agents, or any combination thereof.
The shape of the end of the restriction member 33 in the centerline direction is planar in the example shown in Figure 1, but is not limited to this and may not be planar.
Figure 5 is a diagram showing another example of the longitudinal section of the flavor inhalation article 1 according to the first embodiment, where (A) shows a restriction member 33 with a sharp second side, and (B) shows a longitudinal section of a flavor inhalation article 1 with a restriction member 33 that narrows from the first side to the second side.
For example, the shape of the end of the restriction member 33 in the centerline direction may be planar on the first side of the restriction member 33 and sharp on the second side of the restriction member 33, as shown in Figure 5(A). Additionally, for example, as shown in Figure 5(B), the width of the restriction member 33 may be relatively smaller in the second side region compared to the first side region.
Here, using Figures 1, 6, and 7, specific examples of the arrangement of the restriction member 33 will be explained.
Figure 6 is a diagram showing another example of the longitudinal section of the flavor inhalation article 1 according to the first embodiment, where (A) shows a state where the restriction member 33 is positioned on the second side within the filter 31, and (B) shows a state where the restriction member 33 is positioned closer to the center within the filter 31.
Figure 7 is a diagram showing another example of the longitudinal section of the flavor inhalation article 1 according to the first embodiment, where (A) shows a state where the restriction member 33 with the same size in the centerline direction as the filter 31 is positioned within the filter 31, and (B) shows a state where multiple restriction members 33 are positioned within the filter 31.
It is preferred that the restriction member 33 is arranged so as not to protrude from the end face on the second side of the filter 31.
In the example shown in Figure 1, a restriction member 33 smaller than the size of the filter 31 in the centerline direction is positioned on the first side (substrate section 10 side) within the filter 31. Specifically, the restriction member 33 is positioned in the upstream region within the filter 31. By positioning the restriction member 33 on the first side (substrate section 10 side) within the filter 31, it is possible to achieve suitable aerosol filtration while ensuring that the restriction member 33 is not visible from the end face on the second side of the filter 31.
In the example shown in Figure 6(A), a restriction member 33 smaller than the size of the filter 31 in the centerline direction is positioned on the second side (downstream side) within the filter 31. Specifically, the restriction member 33 is positioned in the region on the second side within the filter 31. By positioning the restriction member 33 in the region on the second side (downstream side) within the filter 31, the strength of the region of the mouthpiece segment 50 that the user holds in his or her mouth can be enhanced.
When the restriction member 33 is positioned on the second side within the filter 31, it is preferred that the end face on the second side of the restriction member 33 is 2 mm or more away from the end face on the second side of the filter 31. By having the end face on the second side of the restriction member 33 be 2 mm or more away from the end face on the second side of the filter 31, the restriction member 33 can be made invisible from the end face on the second side of the filter 31 in the centerline direction of the filter section 30. Note that the end face on the second side of the restriction member 33 may be positioned at the end face on the second side of the filter 31.
The arrangement of a restriction member 33 smaller than the size of the filter 31 in the centerline direction is not limited to the region on the first side or the region on the second side within the filter 31.
In the example shown in Figure 6(B), a restriction member 33 smaller than the size of the filter 31 in the centerline direction is positioned closer to the center within the filter 31 in the centerline direction. Specifically, the restriction member 33 is positioned in the region closer to the center within the filter 31 in the centerline direction. By positioning the restriction member 33 in the region closer to the center within the filter 31, the strength of the region corresponding to the user's teeth when the mouthpiece segment 50 is bitten can be enhanced.
The restriction member 33 should be arranged so as not to protrude from the end face on the second side of the filter 31, and is not limited to the above configuration.
As shown in Figure 7(A), a restriction member 33 with the same size in the centerline direction as the filter 31 may be positioned within the filter 31.
Additionally, when arranging multiple restriction members 33, the arrangement of the restriction members 33 is not limited to the same region in the centerline direction, as shown in Figure 4(B). As shown in Figure 7(B), restriction members 33 may be positioned in multiple regions within the filter 31.
By increasing the proportion of the restriction member 33 relative to the filter 31, the strength of the mouthpiece segment 50 can be enhanced while restricting the flow path of aerosol through the filter section 30.
As described above, the flavor inhalation article 1 includes at least the substrate section 10 containing an aerosol source 11, the cooling section 20 that cools the vapor generated by heating the substrate section 10 to produce aerosol, the filter section 30 through which the aerosol passes, and the tip paper 40 wrapped around the outer peripheral surfaces of the substrate section 10, the cooling section 20, and the filter section 30. The filter section 30 includes a filter 31, which is a paper filter, and the restriction member 33 disposed within the filter 31 that restricts the flow path of aerosol within the filter 31. Note that the flavor inhalation article 1 may not include the cooling section 20 from the standpoint of compactness in the centerline direction.
The restriction member 33 is a member that is less permeable to aerosol than the filter 31, or a member that does not allow aerosol to pass through within the filter 31.
By restricting the flow path of aerosol within the filter 31 using the restriction member 33, it is possible to achieve both the same air resistance and aerosol filtration rate as a fiber filter, even with the filter 31, which is a paper filter. Additionally, even with the filter 31, which is a paper filter, by adjusting the resistance felt by the user in the throat during inhalation and the concentration of the aerosol using the restriction member 33, an appropriate sensation of inhalation can be provided to the user.

Figure 8 is a diagram showing a longitudinal section of a flavor inhalation article 2 according to the second embodiment, where (A) shows a state where the restriction member 33 is positioned on the first side within the filter 31, and (B) shows a state where the restriction member 33 is positioned on the second side within the filter 31.
The flavor inhalation article 2 according to the second embodiment differs from the flavor inhalation article 1 according to the first embodiment in that a filter section 230 corresponding to the filter section 30 is different. The differences from the first embodiment will be described below. The same reference numerals are used for the same components in the first and second embodiments, and detailed descriptions are omitted.
The filter section 230 includes a filter 31, which is a paper filter, a separate filter 32 that is an independent filter separate from the filter 31, the restriction member 33, and a winding paper 35 that exists between the filter 31 and a tip paper 40 and is wrapped around the outer peripheral surface of the filter 31. The filter section 230 is connected (linked) to the cooling section 20 by being wrapped together with the cooling section 20 using the tip paper 40. Note that it is preferable for the filter 31 and the separate filter 32 to be wrapped with separate winding papers 35 and then further wrapped together with another winding paper 35.
The cross-section of the separate filter 32 in the filter section 230 is substantially circular, and the circumference can be appropriately adjusted according to the size of the product, but can be 22 mm or more and 27 mm or less, for example. Note that if the cross-section is not circular, the above circumference is applied by assuming a circle having the same area as that cross-section, and the circumference of that circle is used.
The air resistance and size in the centerline direction of the filter section 230 can be exemplified as being the same as the air resistance and size in the centerline direction of the filter section 30. The shape and dimensions of the filter 31 and the separate filter 32 can be appropriately adjusted so that the shape and dimensions of the filter section 230 fall within the above range.
The separate filter 32 includes a filter material and is not particularly restricted as long as it has the general functions of a filter. The general functions of a filter include, for example, adjusting the amount of air mixed during aerosol inhalation, reducing flavor, and reducing nicotine and tar, but it is not necessary to have all of these functions. Furthermore, in the non-combustion heating-type flavor inhalation article 2, which tends to have fewer generated components and a lower filling rate of the aerosol source 11 compared to cigarette products, it is also an important function to prevent the detachment of components contained within the flavor inhalation article 2 while suppressing the filtration function.
The filter material constituting the separate filter 32 is, for example, a filling material such as cellulose acetate fibers, nonwoven fabric, or pulp paper formed into a cylindrical shape. Additionally, a paper filter filled with sheet-like pulp paper may be used. In addition to these filling materials, activated carbon, inorganic adsorbents such as sepiolite, palygorskite, zeolite, activated carbon fibers, activated alumina, sepiolite mixed paper, silica gel, activated clay, vermiculite, and diatomaceous earth, as well as other polymer porous bodies such as pulp, various fibers, and ion exchange resins can be used.
The filling density of the filter material constituting the separate filter 32 is not particularly restricted, but is usually 90 mg/cm³ or more and 360 mg/cm³ or less, and preferably 150 mg/cm³ or more and 240 mg/cm³ or less.
In the example shown in Figure 8(A), the filter section 230 includes the filter 31 and a separate filter 32 positioned on the first side of the filter 31. In other words, the separate filter 32 is positioned on the upstream side, and the filter 31 is positioned on the downstream side within the filter section 230. A restriction member 33 smaller than the size of the filter 31 in the centerline direction is positioned on the first side (substrate section 10 side) within the filter 31. Specifically, the restriction member 33 is positioned in the upstream region within the filter 31.
As shown in Figure 8(B), a restriction member 33 smaller than the size of the filter 31 in the centerline direction may be positioned on the second side (downstream side) within the filter 31. Specifically, the restriction member 33 may be positioned in the region on the second side within the filter 31. When the restriction member 33 is positioned on the second side within the filter 31, it is preferred that the end face on the second side of the restriction member 33 is 2 mm or more away from the end face on the second side of the filter 31.
The configuration of the filter section 230 is not limited to the examples shown in Figures 8(A) and 8(B), and the positional relationship between the filter 31 and the separate filter 32 may be altered. For instance, as shown in Figure 9, the filter section 230 may have the filter 31 positioned on the upstream side and the separate filter 32 on the downstream side.
Figure 9 is a diagram showing another example of the longitudinal section of the flavor inhalation article 2 according to the second embodiment, where (A) shows a state where the restriction member 33 is positioned on the first side within the filter 31, and (B) shows a state where the restriction member 33 is positioned on the second side within the filter 31.
When the filter section 230 includes the filter 31 and a separate filter 32 positioned on the second side of the filter 31, a restriction member 33 smaller than the size of the filter 31 in the centerline direction may be positioned on the first side (substrate section 10 side) within the filter 31, as shown in Figure 9(A). Additionally, a restriction member 33 smaller than the size of the filter 31 in the centerline direction may be positioned on the second side (downstream side) within the filter 31, as shown in Figure 9(B). Specifically, the restriction member 33 may be positioned in the region on the second side within the filter 31.
As described above, the filter section 230 of the flavor inhalation article 2 according to the second embodiment includes a filter 31, which is a paper filter, a separate filter 32 that is an independent filter separate from the filter 31, and a restriction member 33 that restricts the flow path of aerosol within the filter 31. The presence of the separate filter 32 in addition to the filter 31 allows for diversification of the air resistance of the filter section 230.
Note that in the above examples, the filter section 230 has a dual structure with the filter 31, which is a paper filter, and the separate filter 32, but it is not limited to this. The filter section 230 may include two or more types of filters in addition to the filter 31, which is a paper filter.

Figure 10 is a diagram showing a longitudinal section of a flavor inhalation article 3 according to the third embodiment.
The flavor inhalation article 3 according to the third embodiment differs from the flavor inhalation article 1 according to the first embodiment in that the filter section 330 corresponding to the filter section 30 is different. The differences from the first embodiment will be described below. The same reference numerals are used for the same components in the first and third embodiments, and detailed descriptions are omitted.
The filter section 330 includes the filter 31, which is a paper filter, an aerosol modifier 34 that modifies the aerosol, and a winding paper 35 that exists between the filter 31 and the tip paper 40 and is wrapped around the outer peripheral surface of the filter 31. The filter section 330 is connected (linked) to the cooling section 20 by being wrapped together with the cooling section 20 using the tip paper 40. Note that the winding paper 35 may not be included.
The aerosol modifier 34 is disposed within the filter 31 of the filter section 330. The part of the aerosol modifier 34 that contacts the aerosol is a member that is less permeable to aerosol than the sheet member 31a of the filter 31 (see Figure 3(B)), or a member that does not allow aerosol to pass through within the filter 31. The aerosol modifier 34 restricts the flow path of aerosol within the filter 31 and modifies the aerosol passing through the filter 31. The aerosol modifier 34 is an example of a restriction member.
The position of the aerosol modifier 34 in the longitudinal section of the filter 31 can be exemplified as being the same as the position of the restriction member 33 in the longitudinal section of the filter 31 in the first embodiment.
"Modification of the aerosol" is not particularly restricted as long as the quality of the aerosol before passing through the aerosol modifier 34 differs from the quality of the aerosol after passing through the aerosol modifier 34, but it is preferred that the quality of the aerosol after passing through the aerosol modifier 34 is improved compared to the quality of the aerosol before passing through the aerosol modifier 34.
For example, the aerosol modifier 34 releases components that affect flavor, changing the flavor of the aerosol perceived by the user. Additionally, the aerosol modifier 34 may improve the quality of the aerosol by adsorbing and removing specific components contained in the contacted aerosol. The components contained in the aerosol are, for example, substances generated by heating the substrate section 10. Furthermore, the aerosol modifier 34 may improve the quality of the aerosol by denaturing some components contained in the contacted aerosol.
The aerosol modifier 34 is, for example, a destructive capsule that releases contents containing fragrance components when external force is applied. If the aerosol modifier 34 is a destructive capsule, the flow path of the aerosol is restricted when the aerosol modifier 34 is not destroyed, and the restriction of the flow path of the aerosol is released when the aerosol modifier 34 is destroyed.
If the aerosol modifier 34 is a destructive capsule, the aerosol modifier 34 is preferably embedded in a position where the contents do not leak from the end face on the first side and the end face on the second side of the filter 31. In other words, the aerosol modifier 34 is preferably positioned so that the diffusion of the contents is contained within the filter section 330.
The aerosol modifier 34 includes contents containing at least one of flavor components and fragrance components, and a capsule body that holds the contents. The aerosol modifier 34 is crushed by the user, causing the capsule body to be destroyed and the contents inside to be released. Crushing involves, for example, pressing the winding paper 35 and the tip paper 40 with the thumb and index finger to apply pressure to the aerosol modifier 34, which is a destructive capsule.
Examples of flavor components include citric acid, tartaric acid, monosodium glutamate, neotame, thaumatin, stevia, sorbitol, xylitol, erythritol, aspartame, rutin, hesperidin, oxalic acid, tannic acid, catechin, naringin, quinine, quinic acid, limonin, caffeine, capsaicin, vitamins, amino acids, polyphenols, alginic acid, flavonoids, lecithin, etc. Flavor components are preferably liquid or substantially soluble in the oral cavity.
Fragrance components are not particularly limited and may include, for example, powdered fragrances, oily fragrances, etc. Main powdered fragrances include chamomile, fenugreek, menthol, mint, cinnamon, herbs, etc., in powdered form. Main oily fragrances include lavender, cinnamon, cardamom, celery, clove, cascarilla, nutmeg, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon, orange, mint, cinnamon, caraway, cognac, jasmine, chamomile, menthol, cassia, ylang-ylang, sage, spearmint, fennel, pimento, ginger, anise, coriander, coffee, tobacco, etc. Fragrance components may be used alone or in combination of two or more. When using powdered fragrances, it is preferred that the particle size is 500 µm or less. Fragrance components are preferably liquid or substantially soluble in the oral cavity.
The contents may include at least one of flavor components and fragrance components, and may also contain colorants such as synthetic colorants and natural colorants. Preferred colorants include food additives such as Red Nos. 3 and 106, Beta-Carotene, Copper Chlorophyllin, Gardenia Blue, Yellow No. 4, etc.
The contents may further include a solvent for dissolving the flavor components, fragrance components, and colorants. Examples of solvents include medium-chain triglycerides, glycerin, propylene glycol, water, ethanol, etc.
When the contents are liquid or gel-like, they may penetrate the filter 31 and the winding paper 35, so it is preferred that the viscosity is 20 mPa·s or more, and 30 mPa·s or more. Additionally, it is preferred that the viscosity of the contents is 120 mPa·s or less, and 90 mPa·s or less. Having the viscosity of the contents above the lower limit allows the contents to spread within the flavor inhalation article 3, imparting new flavors to the aerosol. Additionally, having the viscosity of the contents below the upper limit prevents the contents from penetrating the filter 31 and the winding paper 35 too quickly, which could cause the contents to seep out to the outside of the flavor inhalation article 3 during use.
Furthermore, if the liquid amount of the contents per unit area of the cross-section of the filter 31 is less than 0.2 µl/mm², there is a risk that the contents may not sufficiently penetrate the filter 31. On the other hand, if the liquid amount of the contents per unit area of the cross-section of the filter 31 is more than 2.2 µl/mm², there is a risk that the contents may reach the end face on the second side of the flavor inhalation article 3 and adhere to the user. Therefore, it is preferred that the liquid amount of the contents per unit area of the cross-section of the filter 31 is 0.2 µl/mm² or more and 2.2 µl/mm² or less, and more preferably 0.3 µl/mm² or more and 0.7 µl/mm² or less.
Materials for the capsule body include, for example, starch, dextrin, polysaccharides, agar, gellan gum, gelatin, polyvinyl chloride, polyvinylidene chloride, polystyrene, styrene-acrylonitrile copolymer, styrene-butadiene-acrylonitrile copolymer, polyethylene, polypropylene, cellulose acetate, polyethylene terephthalate, polyamide, ethylene-acrylic acid plastic, ethylene-vinyl acetate plastic, ethylene-vinyl alcohol plastic, various natural gelling agents, etc. The capsule body may include, in addition to the above materials, fragrance components, plasticizers, colorants, etc.
When the aerosol modifier 34 is a destructive capsule, its shape is not particularly restricted and may be spherical, cylindrical, frustoconical, etc. Examples of destructive capsules include spherical shapes with a diameter of 2.5 mm or more and 4.0 mm or less, cylindrical shapes with a size in the centerline direction of 5 mm or more and 10 mm or less and a diameter of 5 mm or more and 7 mm or less. Additionally, when arranging multiple spherical destructive capsules, it is preferred that the destructive capsules have a diameter of 3.5 mm or less.
The manufacturing method of the destructive capsule is not particularly restricted, but it is preferred to use a dropping method capable of producing destructive capsules with a seamless capsule body.
The aerosol modifier 34 is described as a destructive capsule that releases contents containing fragrance components when external force is applied, but is not limited to this as long as it modifies the aerosol.
For example, the aerosol modifier 34 may be an adsorbent with the function of adsorbing and removing substances generated by heating the substrate section 10. Adsorbents are not particularly limited and may include activated carbon, sepiolite, palygorskite, zeolite, activated carbon fibers, activated alumina, sepiolite mixed paper, silica gel, activated clay, vermiculite, diatomaceous earth, ion exchange resins, etc. As the aerosol modifier 34, a granular adsorbent may be added to the filter 31, or an adsorbent granulated into a spherical shape with a diameter of 2.5 mm or more and 4.0 mm or less may be positioned in the filter 31.
Additionally, for example, the aerosol modifier 34 may be a fragrance carrier that releases fragrance components when moisture or heat is applied. Fragrance carriers are not particularly limited and may include those in which fragrance components are carried on carriers such as dextrin, cyclodextrin, etc. As the aerosol modifier 34, a sheet-like fragrance carrier may be positioned in the filter 31, or a fragrance carrier granulated into a spherical shape with a diameter of 2.5 mm or more and 4.0 mm or less may be positioned in the filter 31.
As described above, the filter section 330 of the flavor inhalation article 3 according to the third embodiment includes a filter 31, which is a paper filter, and an aerosol modifier 34 that modifies the aerosol. By having the aerosol modifier 34, as an example of a restriction member, within the filter section 330, it is possible to modify the aerosol generated from the substrate section 10 during inhalation while providing the user with an appropriate sensation of inhalation. Additionally, by having the aerosol modifier 34 as a destructive capsule that releases contents containing fragrance components when external force is applied, the user can control whether or not to restrict the flow path of aerosol within the filter 31.

Figure 11 is a diagram showing a longitudinal section of a flavor inhalation article 4 according to the fourth embodiment, where (A) shows a state where the restriction member 33 is positioned on the first side of the aerosol modifier 34, and (B) shows a state where the restriction member 33 is positioned on the second side of the aerosol modifier 34.
The flavor inhalation article 4 according to the fourth embodiment differs from the flavor inhalation article 1 according to the first embodiment in that the filter section 430 corresponding to the filter section 30 is different. Specifically, the filter section 430 according to the fourth embodiment differs from the filter section 30 according to the first embodiment in that it has multiple restriction members with different forms. The differences from the first embodiment will be described below. The same reference numerals are used for the same components in the first and fourth embodiments, and detailed descriptions are omitted.
The filter section 430 includes a filter 31, which is a paper filter, a restriction member 33 that restricts the flow path of aerosol within the filter 31, an aerosol modifier 34 that modifies the aerosol, and a winding paper 35 that exists between the filter 31 and the tip paper 40 and is wrapped around the outer peripheral surface of the filter 31. The filter section 430 is connected (linked) to the cooling section 20 by being wrapped together with the cooling section 20 using the tip paper 40. Note that the winding paper 35 may not be included.
The configuration of the aerosol modifier 34 in the filter section 430 can be exemplified as being the same as the aerosol modifier 34 included in the filter section 330 of the third embodiment. The aerosol modifier 34 may be, for example, a destructive capsule, an adsorbent, or a fragrance carrier.
The position of the aerosol modifier 34 in the longitudinal section of the filter 31 is not particularly restricted, but is preferred to be arranged in a straight line with the restriction member 33 in the centerline direction. In other words, it is preferred that the aerosol modifier 34 is arranged in a straight line in the longitudinal direction of the filter section 430 with the restriction member 33.
Specifically, it is preferred that the aerosol modifier 34 is positioned at a location where aerosol that avoids the restriction member 33 passes through or where aerosol that collides with the aerosol modifier 34 avoids the restriction member 33. By positioning the aerosol modifier 34 in correspondence with the restriction member 33, the delivery efficiency of the modified aerosol can be improved.
In the example shown in Figure 11(A), the filter section 430 has an aerosol modifier 34 positioned on the second side (downstream side) relative to the restriction member 33 and arranged in a straight line with the restriction member 33 in the centerline direction. By having the aerosol modifier 34 positioned on the second side (downstream side) relative to the restriction member 33 and arranged in a straight line in the longitudinal direction of the filter section 430, the aerosol that has passed through the region where the restriction member 33 is positioned can efficiently contact the aerosol modifier 34 during inhalation. Additionally, by having the aerosol efficiently contact the aerosol modifier 34, the modification effect of the aerosol can be improved.
As shown in Figure 11(B), the filter section 430 may have an aerosol modifier 34 positioned on the first side (upstream side) relative to the restriction member 33 and arranged in a straight line with the restriction member 33 in the centerline direction. By having the aerosol modifier 34 positioned on the first side (substrate section 10 side) relative to the restriction member 33 and arranged in a straight line in the longitudinal direction of the filter section 430, it is possible to restrict part of the flow path of the modified aerosol during inhalation. Additionally, by having the aerosol modifier 34 positioned on the second side (downstream side) relative to the restriction member 33 and arranged in a straight line in the longitudinal direction of the filter section 430, the aerosol filled within the filter 31 can be brought into contact with the aerosol modifier 34, improving the modification effect of the aerosol.
As described above, the filter section 430 of the flavor inhalation article 4 according to the fourth embodiment includes a filter 31, which is a paper filter, a restriction member 33 that restricts the flow path of aerosol within the filter 31, and an aerosol modifier 34 that modifies the aerosol. The aerosol modifier 34, like the restriction member 33, restricts the flow path of aerosol within the filter 31. By having the restriction member 33 and the aerosol modifier 34 within the filter section 430, it is possible to modify the aerosol generated from the substrate section 10 during inhalation while providing the user with an appropriate sensation of inhalation. Additionally, by having the aerosol modifier 34 as a destructive capsule that releases contents containing fragrance components when external force is applied, it is possible to impart new flavors to the aerosol while providing an appropriate sensation of inhalation.

Figure 12 is a diagram showing a longitudinal section of a flavor inhalation article 5 according to the fifth embodiment.
The flavor inhalation article 5 according to the fifth embodiment differs from the flavor inhalation article 1 according to the first embodiment in that the usage form is different. Additionally, the flavor inhalation article 5 according to the fifth embodiment differs from the flavor inhalation article 1 according to the first embodiment in that the mouthpiece segment 550 corresponding to the mouthpiece segment 50 and the communication hole 560 corresponding to the through-hole 60 are different. The differences from the first embodiment will be described below. The same reference numerals are used for the same components in the first and fifth embodiments, and detailed descriptions are omitted.
The flavor inhalation article 5 is a combustion-type flavor inhalation article. It is used by burning the end face on the first side, which is the side opposite to the second side that the user holds in their mouth for inhalation. The aerosol source 11 contained in the substrate section 10 generates vapor, which is used to produce aerosol through heating associated with combustion.
The cross-section of the flavor inhalation article 5 is substantially circular, and its circumference can be appropriately changed according to the size of the product, but is usually 16 mm or more and 27 mm or less, and preferably 22 mm or more and 25 mm or less. Note that if the cross-section is not circular, the above circumference is applied by assuming a circle having the same area as that cross-section, and the circumference of that circle is used.
The size in the centerline direction of the flavor inhalation article 5 can be appropriately changed according to the size of the product, but is usually 60 mm or more and 120 mm or less, and preferably 80 mm or more and 100 mm or less.
The mouthpiece segment 550 is composed of the filter section 30.
The size of the mouthpiece segment 550 in the centerline direction can be appropriately adjusted according to the size of the product, but is usually 20 mm or more and 40 mm or less, and preferably 25 mm or more and 30 mm or less.
Additionally, the mouthpiece segment 550 is provided with multiple communication holes 560 in the circumferential direction and concentrically. The communication holes 560 are holes that allow air flowing in from the vent holes provided in the tip paper 40 to communicate with the voids 31b within the filter 31 (see Figure 3(A)). By adjusting the amount of air flowing in from the communication holes 560, the concentration of the aerosol inhaled by the user can be adjusted.
Additionally, when the filter section 30 of the mouthpiece segment 550 is in a form where the filter 31 is wrapped with the winding paper 35 and the tip paper 40, it is preferable that the winding paper 35 is provided with a communication hole 560 at a position corresponding to the vent hole provided in the tip paper 40. When manufacturing a flavor inhalation article 5 with such a mouthpiece segment 550, the tip paper 40 may be wrapped so that the communication hole 560 overlaps with the vent hole provided in the tip paper 40, but from the perspective of ease of manufacturing, it is preferable to first produce a flavor inhalation article 5 without a communication hole 560, and then create a hole that penetrates both the mouthpiece segment 550 and the tip paper 40 simultaneously.
The region where the communication hole 560 is located is preferably a region where the filling density of the sheet member constituting the filter 31 is relatively low, in other words, a region where the restriction member 33 is not disposed within the filter 31, from the perspective of improving the efficiency of air inflow.
In the example shown in Figure 12, a restriction member 33 smaller than the size of the filter 31 in the centerline direction is positioned on the first side (substrate section 10 side) within the filter 31, and the communication hole 560 is provided in a region where the restriction member 33 is not disposed within the filter 31. Specifically, the communication hole 560 is provided in the region downstream of the restriction member 33.
The communication hole 560 need only be provided in a region where the restriction member 33 is not disposed within the filter 31, and it is not limited to the above configuration.
Figure 13 is a diagram showing another example of the longitudinal section of the flavor inhalation article 5 according to the fifth embodiment, where (A) shows a state where the restriction member 33 is positioned on the second side within the filter 31, (B) shows a state where the restriction member 33 is positioned closer to the center within the filter 31, and (C) shows a state where multiple restriction members 33 are positioned within the filter 31.
When a restriction member 33 smaller than the size of the filter 31 in the centerline direction is positioned on the second side (downstream side) within the filter 31, as shown in Figure 13(A), the communication hole 560 may be provided in the region upstream of the restriction member 33.
Additionally, when a restriction member 33 smaller than the size of the filter 31 in the centerline direction is positioned closer to the center within the filter 31 in the centerline direction, as shown in Figure 13(B), the communication hole 560 may be provided in the region upstream of the restriction member 33. Note that the communication hole 560 may be provided in the region downstream of the restriction member 33.
Additionally, when multiple restriction members 33 are positioned in multiple regions within the filter 31, as shown in Figure 13(C), the communication hole 560 may be provided in a region where the restriction member 33 is not disposed within the filter 31. The communication hole 560 may be provided in any of the upstream, central, or downstream regions as long as it is a region where the restriction member 33 is not disposed.
As described above, the flavor inhalation article 5 according to the fifth embodiment includes at least a substrate section 10 containing an aerosol source 11, a filter section 30 through which the aerosol passes, and a tip paper 40 wrapped around the outer peripheral surfaces of the substrate section 10 and the filter section 30. The filter section 30 includes a filter 31, which is a paper filter, and a restriction member 33 disposed within the filter 31 that restricts the flow path of aerosol within the filter 31. When a paper filter is used in a combustion-type flavor inhalation article, it is possible to provide the user with an appropriate sensation of inhalation.

Figure 14 is a diagram showing a longitudinal section of a flavor inhalation article 6 according to the sixth embodiment, where (A) shows a state where the restriction member 33 is positioned on the first side within the filter 31, and (B) shows a state where the restriction member 33 is positioned on the second side within the filter 31.
The flavor inhalation article 6 according to the sixth embodiment differs from the flavor inhalation article 5 according to the fifth embodiment in that the filter section 630 corresponding to the filter section 30 is different. The differences from the fifth embodiment will be described below. In the fifth and sixth embodiments, the same reference numerals are used for the same components, and detailed descriptions are omitted.
The filter section 630 includes filter 31, which is a paper filter, a separate filter 32 that is an independent filter separate from filter 31, a restriction member 33 that restricts the flow path of aerosol, and a winding paper 35 that exists between filter 31 and the tip paper 40 and is wrapped around the outer peripheral surface of filter 31. The filter section 630 is connected (linked) to the substrate section 10 by being wrapped together with the filter section 230 using the tip paper 40. Note that it is preferable for the filter 31 and the separate filter 32 to be wrapped with separate winding papers 35 and then further wrapped together with another winding paper 35.
The material of the separate filter 32 in the filter section 630 can be exemplified as being the same as the separate filter 32 included in the filter section 230 according to the second embodiment. The shape and dimensions of filter 31 and the separate filter 32 can be appropriately adjusted to fall within the aforementioned range.
The filter section 630 includes a separate filter 32 connected to the second side of the substrate section 10 and filter 31 positioned on the second side of the separate filter 32. The separate filter 32 is positioned on the upstream side, and filter 31 is positioned on the downstream side. As shown in Figure 14(A), a restriction member 33 smaller than the size of filter 31 in the centerline direction is positioned on the first side (upstream side) within filter 31, and a communication hole 560 may be provided in the region downstream of the restriction member 33. Additionally, as shown in Figure 14(B), a restriction member 33 smaller than the size of filter 31 in the centerline direction is positioned on the second side (downstream side) within filter 31, and a communication hole 560 may be provided in the region upstream of the restriction member 33.
The configuration of the filter section 630 is not limited to the examples shown in Figures 14(A) and (B), and the positional relationship between the filter 31 and the separate filter 32 may be altered.
Figure 15 is a diagram showing a longitudinal section of a flavor inhalation article 6 according to the sixth embodiment, where (A) shows a state where the restriction member 33 is positioned on the first side within filter 31, and (B) shows a state where the restriction member 33 is positioned on the second side within filter 31.
The filter section 630 includes filter 31 connected to the second side of the substrate section 10 and the separate filter 32 positioned on the second side of filter 31. Filter 31 is positioned on the upstream side, and the separate filter 32 is positioned on the downstream side. As shown in Figure 15(A), a restriction member 33 smaller than the size of filter 31 in the centerline direction is positioned on the first side (upstream side) within filter 31, and a communication hole 560 may be provided in the region downstream of the restriction member 33. Additionally, as shown in Figure 15(B), a restriction member 33 smaller than the size of filter 31 in the centerline direction is positioned on the second side (downstream side) within filter 31, and a communication hole 560 may be provided in the region upstream of the restriction member 33.
As described above, the filter section 630 of the flavor inhalation article 6 according to the sixth embodiment includes filter 31, which is a paper filter, a separate filter 32 that is an independent filter separate from filter 31, and a restriction member 33 that restricts the flow path of aerosol within filter 31. Note that in the above examples, the filter section 630 has a dual structure with the filter 31, which is a paper filter, and the separate filter 32, but it is not limited to this. The filter section 630 may include two or more types of filters in addition to the filter 31, which is a paper filter.

Figure 16 is a diagram showing a longitudinal section of a flavor inhalation article 7 according to the seventh embodiment, where (A) shows a state where the restriction member 33 is positioned on the first side of the aerosol modifier 34, (B) shows a state where the restriction member 33 is positioned on the second side of the aerosol modifier 34, and (C) shows a state where the restriction member 33 is positioned on both the first side and the second side of the aerosol modifier 34.
The flavor inhalation article 7 according to the seventh embodiment differs from the flavor inhalation article 5 according to the fifth embodiment in that the filter section 730 corresponding to the filter section 30 is different. Specifically, the filter section 730 according to the seventh embodiment differs from the filter section 30 according to the fifth embodiment in that it has multiple restriction members with different forms. The differences from the fifth embodiment will be described below. The same reference numerals are used for the same components in the fifth and seventh embodiments, and detailed descriptions are omitted.
The filter section 730 includes a filter 31, which is a paper filter, a restriction member 33 that restricts the flow path of aerosol, an aerosol modifier 34 that modifies the aerosol, and a winding paper 35 that exists between filter 31 and the tip paper 40 and is wrapped around the outer peripheral surface of filter 31. The filter section 730 is connected (linked) to the substrate section 10 by being wrapped together with the filter section 730 using the tip paper 40. Note that the winding paper 35 may not be included.
The configuration of the aerosol modifier 34 in the filter section 730 can be exemplified as being the same as the aerosol modifier 34 included in the filter section 330 of the third embodiment.
When the aerosol modifier 34 is positioned on the second side (downstream side) relative to the restriction member 33 and arranged in a straight line in the centerline direction with the restriction member 33, as shown in Figure 16(A), a communication hole 560 may be provided in the region between the restriction member 33 and the aerosol modifier 34. Additionally, the communication hole 560 may be provided in the region downstream of the aerosol modifier 34.
Alternatively, when the aerosol modifier 34 is positioned on the first side (upstream side) relative to the restriction member 33 and arranged in a straight line in the centerline direction with the restriction member 33, as shown in Figure 16(B), a communication hole 560 may be provided in the region between the restriction member 33 and the aerosol modifier 34. Additionally, the communication hole 560 may be provided in the region upstream of the aerosol modifier 34.
Furthermore, when the aerosol modifier 34 is positioned in the region between multiple restriction members 33 and arranged in a straight line in the centerline direction with the multiple restriction members 33, as shown in Figure 16(C), a communication hole 560 may be provided in the region between the restriction member 33 and the aerosol modifier 34.
As described above, the filter section 730 of the flavor inhalation article 7 according to the seventh embodiment includes a filter 31, which is a paper filter, a restriction member 33 that restricts the flow path of aerosol within filter 31, and an aerosol modifier 34 that modifies the aerosol. The aerosol modifier 34, like the restriction member 33, restricts the flow path of aerosol within the filter 31. By having the restriction member 33 and the aerosol modifier 34 within the filter section 730, it is possible to modify the aerosol generated from the substrate section 10 during inhalation while providing the user with an appropriate sensation of inhalation.
Note that from the perspective of compactness, the filter section 730 may not have the restriction member 33 and the aerosol modifier 34 separately, and may have a member that restricts the flow path of aerosol within filter 31 and modifies the aerosol.

Note that the present disclosure includes the following configurations.

(1) A flavor inhalation article comprising
- a substrate section including an aerosol source, and
- a filter section through which aerosol generated from the substrate section passes,
- wherein the filter section includes a paper filter and a restriction member which is disposed in the paper filter and restricts the flow path of the aerosol within the paper filter.
(2) The flavor inhalation article according to (1), wherein
the restriction member is selected from a hollow member or a solid member with both ends closed in the longitudinal direction of the filter section, a capsule containing powder or liquid inside, a thread, a string, or a rope.
(3) The flavor inhalation article according to (1) or (2), wherein
the restriction member includes at least paper.
(4) The flavor inhalation article according to any one of (1) to (3), wherein
the length of the restriction member along the longitudinal direction of the filter section is shorter than the length of the paper filter along the longitudinal direction.
(5) The flavor inhalation article according to (4), wherein
the difference between the length of the restriction member along the longitudinal direction and the length of the paper filter along the longitudinal direction is 2 mm or more.
(6) The flavor inhalation article according to (4), wherein
the restriction member is positioned on the substrate section side within the paper filter.
(7) The flavor inhalation article according to (4), wherein
the restriction member is positioned on the downstream end side within the paper filter, and the downstream end face of the restriction member is 2 mm or more away from the downstream end face of the paper filter.
(8) The flavor inhalation article according to any one of (1) to (3), wherein
the length of the restriction member along the longitudinal direction of the filter section is the same as the length of the paper filter along the longitudinal direction.
(9) The flavor inhalation article according to any one of (1) to (8), wherein
the ratio of the circumference of the restriction member to the circumference of the paper filter is 0.2 or more and less than 0.7.
(10) The flavor inhalation article according to any one of (1) to (9), wherein
the air resistance of the paper filter is 0 [mmH₂O/10mm] or more and 100 [mmH₂O/10mm] or less.
(11) The flavor inhalation article according to any one of (1) to (10), wherein
an aerosol modifier that modifies the aerosol is disposed within the paper filter.
(12) The flavor inhalation article according to (11), wherein
the aerosol modifier is a destructive capsule that releases a liquid containing fragrance components when external force is applied.
(13) The flavor inhalation article according to (12), wherein
the aerosol modifier is arranged in a straight line in the longitudinal direction of the filter section with the restriction member.
(14) The flavor inhalation article according to (13), wherein
the aerosol modifier is positioned on the downstream end side relative to the restriction member and arranged in a straight line in the longitudinal direction.
(15) The flavor inhalation article according to (13), wherein
the aerosol modifier is positioned on the substrate section side relative to the restriction member and arranged in a straight line in the longitudinal direction.
(16) The flavor inhalation article according to any one of (1) to (15), wherein
the filter section has a cylindrical member formed in a cylindrical shape between the substrate section and the paper filter, and the circumference of the cylindrical member is approximately the same as the circumference of the paper filter.
(17) The flavor inhalation article according to (16), having a tip paper wrapped around the outer peripheral surfaces of the substrate section and the filter section, wherein the tip paper has a vent hole which is formed at a position corresponding to the cylindrical member or the paper filter and allows air to flow from the outside to the inside.
(18) The flavor inhalation article according to any one of (1) to (17), wherein
the paper filter is a filter filled with a sheet member.
(19) The flavor inhalation article according to (18), wherein
the paper filter is a filter filled with a sheet member such that voids are formed across the longitudinal direction of the filter section.
(20) The flavor inhalation article according to (18) or (19), wherein
the paper filter is a filter with a gathered sheet member.
(21) The flavor inhalation article according to any one of (18) to (20), wherein
the filling density of the sheet member is 80 mg/cm³ or more and 720 mg/cm³ or less.
(22) The flavor inhalation article according to any one of (18) to (21), wherein
the sheet member has a density of 0.05 g/cm³ or more and 1.50 g/cm³ or less, and a thickness of 0.03 mm or more and 1.2 mm or less.

This application claims priority based on PCT applications PCT/JP2022/47985 , PCT/JP2022/47988 , and PCT/JP2022/47989 filed on December 26, 2022 , and the contents are incorporated herein by reference.

REFERENCE SIGNS LIST

1, 2, 3, 4, 5, 6, 7... flavor inhalation article, 10... substrate section, 11... aerosol source, 20... cooling section, 30, 230, 330, 430, 630, 730... filter section, 31... filter, 32... separate filter, 33... restriction member, 34... aerosol modifier, 35... winding paper, 40... tip paper, 50, 550... mouthpiece segment, 60... through-hole, 560... communication hole

Claims

A flavor inhalation article comprising
a substrate section including an aerosol source, and

a filter section through which aerosol generated from the substrate section passes,

wherein the filter section includes a paper filter and a restriction member which is disposed in the paper filter and restricts the flow path of the aerosol within the paper filter.
The flavor inhalation article according to claim 1, wherein
the restriction member is selected from a hollow member or a solid member with both ends closed in the longitudinal direction of the filter section, a capsule containing powder or liquid inside, a thread, a string, or a rope.
The flavor inhalation article according to claim 1 or 2, wherein the restriction member includes at least paper.
The flavor inhalation article according to any one of claims 1 to 3, wherein
the length of the restriction member along the longitudinal direction of the filter section is shorter than the length of the paper filter along the longitudinal direction.
The flavor inhalation article according to claim 4, wherein
the difference between the length of the restriction member along the longitudinal direction and the length of the paper filter along the longitudinal direction is 2 mm or more.
The flavor inhalation article according to claim 4, wherein
the restriction member is positioned on the substrate section side within the paper filter.
The flavor inhalation article according to claim 4, wherein
the restriction member is positioned on the downstream end side within the paper filter, and the downstream end face of the restriction member is 2 mm or more away from the downstream end face of the paper filter.
The flavor inhalation article according to any one of claims 1 to 3, wherein
the length of the restriction member along the longitudinal direction of the filter section is the same as the length of the paper filter along the longitudinal direction.
The flavor inhalation article according to any one of claims 1 to 8, wherein
the ratio of the circumference of the restriction member to the circumference of the paper filter is 0.2 or more and less than 0.7.
The flavor inhalation article according to any one of claims 1 to 9, wherein
the air resistance of the paper filter is 0 [mmH₂O/10mm] or more and 100 [mmH₂O/10mm] or less.
The flavor inhalation article according to any one of claims 1 to 10, wherein
an aerosol modifier that modifies the aerosol is disposed within the paper filter.
The flavor inhalation article according to claim 11, wherein
the aerosol modifier is a destructive capsule that releases a liquid containing fragrance components when external force is applied.
The flavor inhalation article according to claim 12, wherein
the aerosol modifier is arranged in a straight line in the longitudinal direction with the restriction member and the filter section.
The flavor inhalation article according to claim 13, wherein
the aerosol modifier is positioned on the downstream end side relative to the restriction member and arranged in a straight line in the longitudinal direction.
The flavor inhalation article according to claim 13, wherein
the aerosol modifier is positioned on the substrate section side relative to the restriction member and arranged in a straight line in the longitudinal direction.
The flavor inhalation article according to any one of claims 1 to 15, wherein
the filter section has a cylindrical member formed in a cylindrical shape between the substrate section and the paper filter, and the circumference of the cylindrical member is approximately the same as the circumference of the paper filter.
The flavor inhalation article according to claim 16, having
a tip paper wrapped around the outer peripheral surfaces of the substrate section and the filter section,

wherein the tip paper has a vent hole which is formed at a position corresponding to the cylindrical member or the paper filter and allows air to flow from the outside to the inside.
The flavor inhalation article according to any one of claims 1 to 17, wherein
the paper filter is a filter filled with a sheet member.
The flavor inhalation article according to claim 18, wherein
the paper filter is a filter filled with a sheet member such that voids are formed across the longitudinal direction of the filter section.
The flavor inhalation article according to claim 18 or 19, wherein
the paper filter is a filter with a gathered sheet member.
The flavor inhalation article according to any one of claims 18 to 20, wherein
the filling density of the sheet member is 80 mg/cm³ or more and 720 mg/cm³ or less.
The flavor inhalation article according to any one of claims 18 to 21, wherein
the sheet member has a density of 0.05 g/cm³ or more and 1.50 g/cm³ or less, and a thickness of 0.03 mm or more and 1.2 mm or less.