WO2024142167A1 - Flavor inhaler filter and flavor inhaler - Google Patents

Abstract

The present invention pertains to a flavor inhaler filter (30) comprising: a paper filter into which is filled a sheet member so that the member forms a void along the longitudinal direction; and a filler (33) that is disposed in the paper filter and that changes the flow path in the paper filter. A downstream-side end of the flavor inhaler filter (30) is positioned at a location which is at least a predetermined distance from the end of the filler (33).

Description

Filter portion for flavor inhalation article and flavor inhalation article

The present invention relates to a filter unit for a flavor inhalation article and a flavor inhalation article.

Patent document 1 discloses a cigarette comprising a tobacco rod and a filter element connected to the tobacco rod, the filter element having an end at a proximal end of the tobacco rod and an end at a distal end from the tobacco rod, the filter element comprising a first portion of filter material at the proximal end of the tobacco rod and a second longitudinally extending portion of filter material at a distal end from the tobacco rod and arranged in an end-to-end configuration on the first portion of filter material, the first portion of filter material comprising one or more tubes inserted into and extending through the first portion of filter material.

JP 2014-509872 A

In some cases, a paper filter is used as a filter for a flavor inhalation article in consideration of the environment. Here, the aerosol filtering ability of a paper filter is generally higher than that of a filter using fibers such as cellulose acetate. Therefore, when a paper filter is used, the flavor and taste due to the aerosol is reduced more than in a filter using fibers such as cellulose acetate.
In order to adjust the flavor and aroma, fillers are sometimes placed in the flow passages inside the paper filter, which can be seen from the end of the filter section, giving the appearance of holes.
An object of the present disclosure is to inhibit the formation of holes in the ends of a filter.

A first feature of the present disclosure, which has been completed with respect to this objective, is a filter section for a flavor inhalation article, comprising: a paper filter filled with a sheet member so as to form a gap in the longitudinal direction; and a filler disposed within the paper filter and configured to change the flow path within the paper filter, wherein the downstream end of the filter section is located at a predetermined distance or more from the end of the filler.
A second feature is that the packing may have a flat surface, and the flat surface may be disposed on a downstream end side.
A third feature is that the packing may have a cylindrical shape.
A fourth feature is that the filler may be a hollow member.
As a fifth feature, the predetermined distance may be ½×A×√3 (A is a diameter of a circumferential circle of the plane).
A sixth feature is that the hollow member may include at least paper.
A seventh feature is that the hollow member may be a straight paper tube made of paper rolled into a cylindrical shape or a spiral paper tube made of a strip of paper rolled obliquely.
An eighth feature may be that the paper filter is a filter in which the sheet member is gathered.
As a ninth feature, the paper filter may be a filter in which the sheet member made of paper or nonwoven fabric is subjected to a crimping treatment.
A tenth feature is that the packing density of the paper filter may be 90 mg/cm ³ or more and 720 mg/cm ³ or less.
An eleventh feature is a flavor inhalation article including the filter portion and a substrate portion including an aerosol source.
A twelfth feature is that the flavor inhalation article may be a non-combustion heating type flavor inhalation article.
A thirteenth feature may be that the flavor inhalation article is a combustion type flavor inhalation article.

According to the first feature, it is possible to provide a filter portion of a flavor inhalation article that does not form a hole in the filter end, compared to a case in which the downstream end of the filter portion is located at a position that is not a predetermined distance from the end of the filling material.
According to the second feature, it is possible to provide a filter section of a flavor inhalation article in which the filling material is uniformly filled, compared to a case in which the plane of the filling material is not positioned on the downstream end side of the filter section.
According to the third feature, it is possible to provide a filter portion of a flavor inhalation article in which the filling is not visible from the end, as compared with a case in which the filling is not cylindrical.
According to the fourth feature, it is possible to provide a filter portion of a flavor inhalation article that can reduce the filtering performance of a paper filter that has too high aerosol filtering performance, compared to when the filling is not a hollow member, and does not affect the flavor and taste of the smoked food.
According to the fifth feature, it is possible to provide a filter section of a flavor inhalation article in which the formation of holes in the filter end is prevented, compared to a case in which the downstream end of the filter section is located at a distance less than ½×A×√3 (A is the diameter of the peripheral circle of the plane) from the end of the filling.
According to the sixth feature, a filter portion of a flavor inhalation article can be provided in which the material constituting the hollow member is closer to that of a paper filter than when the hollow member does not contain paper.
According to the seventh feature, compared to a case in which the hollow member is not composed of a straight paper tube made of paper wound into a cylindrical shape or a spiral paper tube made of a strip-shaped paper wound obliquely, it is possible to provide a filter portion of a flavor inhalation article in which even paper with a small basis weight can be used for the hollow member, the formability is good, and the finished hollow member has excellent strength.
According to the eighth feature, a filter portion of a flavor inhalation article can be provided in which the uniformity of the packing density is increased compared to a filter in which the sheet member is not gathered, thereby reducing the variation in the level of aerosol filtration from rod to rod.
According to the ninth feature, it is possible to provide a filter portion of a flavor inhalation article that has a higher aerosol filtering ability than a paper filter that is not subjected to a crimping treatment.
According to the tenth feature, when a paper filter is used in the flavor inhalation article, suitable filtration of the aerosol can be achieved.
According to the eleventh to thirteenth features, a flavor inhalation article can be provided that does not form a hole in the filter end and does not adversely affect the smoking flavor, compared to a case in which the downstream end of the filter portion is located at a position that is not a predetermined distance from the end of the filling.

1 is a diagram showing a vertical cross section of a non-combustion heating type flavor inhalation article according to a first embodiment. FIG. 1 is a schematic diagram showing a configuration example of a suction device according to a first embodiment; 2 is a diagram showing a cross section of a filter portion of the non-combustion heating type flavor inhalation article according to the first embodiment. FIG. 1 is a schematic diagram showing a filter portion of a non-combustion heating type flavor inhalation article according to a first embodiment. FIG. 3A to 3C are diagrams showing examples of fillings of non-combustion heating type flavor inhalation articles according to the first embodiment and other embodiments. 2 is a diagram showing a cross section of a filter portion of the non-combustion heating type flavor inhalation article according to the first embodiment. FIG. FIG. 11 is a diagram showing a longitudinal section of a non-combustion heating type flavor inhalation article according to another aspect of the first embodiment. FIG. 11 is a diagram showing a longitudinal section of a non-combustion heating type flavor inhalation article according to another aspect of the first embodiment. FIG. 11 is a diagram showing a vertical cross section of a non-combustion heating type flavor inhalation article according to a second embodiment. FIG. 13 is a diagram showing a vertical cross section of a combustion heating type flavor inhalation article according to a fourth embodiment. FIG. 13 is a diagram showing a longitudinal section of a combustion heating type flavor inhalation article according to another aspect of the fourth embodiment. FIG. 13 is a diagram showing a vertical cross section of a combustion heating type flavor inhalation article according to a fifth embodiment. FIG. 13 is a diagram showing a longitudinal section of a combustion heating type flavor inhalation article according to another aspect of the fifth embodiment. 5A to 5C are schematic diagrams illustrating a method for manufacturing a filter portion according to the first embodiment. FIG. 11 is a diagram showing a vertical cross section of a non-combustion heating type flavor inhalation article according to a third embodiment.

Below, an embodiment of the present invention will be described in detail with reference to the attached drawings. In each drawing, the same parts are denoted by the same reference numerals.

<Non-combustion heating type flavor inhalation article>
Fig. 1 is a diagram showing a vertical cross section of a non-combustion heating type flavor inhalation article 1 according to the first embodiment. Fig. 2 is a schematic diagram showing a configuration example of an inhalation device 100 according to the first embodiment.
The non-combustion heating type flavor inhalation article 1 (hereinafter, sometimes referred to as "flavor inhalation article 1") according to the first embodiment includes a substrate section 10, a cooling section 20, and a filter section 30. The mouthpiece segment 50 may be held by the user during inhalation, and includes the cooling section 20 and the filter section 30 in the example of FIG. 1. The substrate section 10 is formed in a cylindrical shape. Hereinafter, the direction of the center line CL of the substrate section 10 may be referred to as the "center line direction". The flavor inhalation article 1 further includes a tip paper 40 that integrates the substrate section 10, the cooling section 20, and the filter section 30 by winding them in a state in which they are arranged in this order in the center line direction.
Hereinafter, one end side in the center line direction (left side in FIG. 1) may be referred to as the first side, and the other end side in the center line direction (right side in FIG. 1) may be referred to as the second side. The first side is the end side inserted into the suction device 100, and is the upstream side in the flow of aerosol during inhalation. The second side is the opposite side to the first side, and is the end side that the user holds in the mouth for inhalation, and is the downstream side in the flow of aerosol during inhalation. In addition, a cross section along the center line direction is referred to as a "longitudinal cross section", and a cross section cut along a plane perpendicular to the center line direction is defined as a "transverse cross section".

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

The heating unit 121 heats the base material 10 of the flavor inhalation article 1. The heating unit 121 is made of any material such as metal or polyimide. For example, the heating unit 121 is configured in a film shape and arranged to cover the outer periphery of the holding unit 140. When the heating unit 121 generates heat, the aerosol source 11 (omitted in FIG. 2) included in the flavor inhalation article 1 is heated from the outer periphery of the flavor inhalation article 1. The heating unit 121 generates heat when power is supplied from the power supply unit 111. As an example, power may be supplied when the sensor unit 112 detects that a predetermined user input has been made. When the temperature of the flavor inhalation article 1 heated by the heating unit 121 reaches a predetermined temperature, the user can inhale. Thereafter, when the sensor unit 112 detects that a predetermined user input has been made, power supply may be stopped. As an example of another usage form, power may be supplied and aerosol may be generated during a period in which the sensor unit 112 detects that the user has inhaled from the filter unit 30 on the downstream side.

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

[Flavor inhalation article 1]
The flavor inhalation article 1 according to the first embodiment is a non-combustion heating type flavor inhalation article.
The cross section of the flavor inhalation article 1 is substantially circular, and its outer diameter can be appropriately changed according to the size of the product, but is usually 16 mm to 27 mm, and preferably 21 mm to 23 mm. If the cross section is not circular, the above outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter of the circle is applied.
The size of the flavor inhalation article 1 in the center line direction 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.

[Filter section 30]
The filter portion 30, which is a feature of the flavor inhalation article 1 according to the first embodiment, will be described.
Fig. 3 is a diagram showing an example of the configuration of the filter section 30 according to the first embodiment, where (A) is a diagram showing an example of a cross section taken along line II in Fig. 1, and (B) is a diagram showing an example of a cross section taken along line II-II in Fig. 1. Fig. 4 is a diagram showing another example of the configuration of the filter section 30 according to the first embodiment, where (A) is a diagram showing an example of a cross section taken along line II in Fig. 1, and (B) is a diagram showing another example of a cross section taken along line II-II in Fig. 1.
The filter unit 30 is formed in a columnar shape whose size in the center line direction is greater than the width of the cross section, and is therefore disposed such that the longitudinal direction of the filter unit 30 coincides with the center line direction.
The filter unit 30 has a filter 31 through which the aerosol passes, a filler 33 that changes the flow path in the filter 31, and a wrapping paper 35 that is between the filter 31 and the tipping paper 40 and is wrapped around the outer circumferential surface of the filter 31 (see FIG. 1). The filter unit 30 is connected (coupled) to the cooling unit 20 by winding up the cooling unit 20 and the filter unit 30 together using the tipping paper 40 (see FIG. 1). The wrapping paper 35 may not be provided.

The form of the wrapping paper 35 is not particularly limited, and may include one or more rows of seams containing adhesive. The adhesive may include a hot melt adhesive, and the hot melt adhesive may further include polyvinyl alcohol. In addition, when the filter portion 30 is composed of two or more members, it is preferable that the wrapping paper is wound around each of these two or more members, and then wrapped with another wrapping paper.
The material of the wrapper 35 is not particularly limited, and any known material can be used, which may contain a filler such as calcium carbonate.
The thickness of the wrapper 35 is not particularly limited, and is usually from 20 μm to 140 μm, preferably from 30 μm to 130 μm, and more preferably from 30 μm to 120 μm.
The basis weight of the roll 35 is not particularly limited, and is usually from 20 gsm to 100 gsm, preferably from 22 gsm to 95 gsm, and more preferably from 23 gsm to 90 gsm.
The air permeability of the wrapper 35 is not particularly limited, but is usually from 0 Coresta units to 30,000 Coresta units, and preferably from more than 0 Coresta units to 10,000 Coresta units.
Additionally, the wrapper 35 may be either coated or uncoated, but is preferably coated with a desired material from the standpoint of imparting functions other than strength and structural rigidity.

The cross section of the filter 31 of the filter unit 30 is substantially circular, and the outer diameter can be changed appropriately according to the size of the product, but can be 22 mm or more and 25 mm or less. If the cross section is not circular, the above outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter of the circle is applied.
The size of the filter portion 30 in the center line direction can be appropriately changed according to the size of the product, but 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 airflow resistance per 10 mm of size in the center line direction of the filter portion 30 is not particularly limited, but is usually 0 _mmH2O to ₁₀₀ mmH2O, preferably ₁₀ mmH2O to ₈₀ mmH2O, and more preferably ₁₀ mmH2O to ₅₀ mmH2O.
The airflow resistance is measured according to the ISO standard method (ISO6565) using, for example, a filter airflow resistance measuring device manufactured by Cerulean Co., Ltd. The airflow resistance of the filter unit 30 refers to the air pressure difference between the first side and the second side when air is allowed to flow at a predetermined air flow rate (17.5 cc/min) from the first side to the second side in a state in which air does not pass through the sides of the filter unit 30. The unit is generally expressed in _mmH2O .

The filter 31 is a paper filter that is filled with a sheet member and is formed so that voids through which the aerosol can pass are formed along the longitudinal direction. In other words, the filter 31 is a paper filter that is filled with a sheet member and formed so as to ensure a passage path for the aerosol extending in the center line direction.
The packing density of the sheet member constituting the filter 31 is not particularly limited, but is usually 90 mg/cm ³ or more and 720 g/cm ³ or less. The packing density of the sheet member differs depending on the presence or absence of the filler 33. FIG. 5 shows a schematic diagram of a region 301 in which the filler 33 is disposed on the cross section of the filter 31, and a region 302 in which the filler 33 is not disposed on the cross section of the filter 31, in the filter portion 30. The cross section of the filter portion in the region 301 is shown in FIG. 3(B), and the cross section of the filter portion in the region 302 is shown in FIG. 3(A). As shown in FIG. 3(A), the packing density of the sheet member in the region in which the filler 33 is not disposed is preferably 90 mg/cm ³ or more and 360 g/cm ³ or less, and more preferably 150 mg/cm ³ or more and 240 g/cm ³ or less. As shown in FIG. 3B, the packing density of the sheet member in the region where the filler 33 is arranged is preferably 105 mg/ ^cm3 or more and 720 g/ ^cm3 or less, and more preferably 170 mg/ ^cm3 or more and 480 g/ ^cm3 or less.

The material of the sheet member constituting the filter 31 is not particularly limited as long as it can realize the general function of the filter, but is preferably paper or nonwoven fabric such as pulp paper whose main component is pulp, and more preferably paper. Other materials such as polymer sheets and metal sheets may be used for the sheet member constituting the filter 31. The general functions of a filter include, for example, adjusting the amount of air mixed in when inhaling an aerosol, reducing flavor, and reducing nicotine and tar, but it is not necessary for the filter to have all of these functions. In addition, in the non-combustion heating type flavor inhalation article 1, which tends to generate fewer components and has a lower filling rate of the aerosol source 11 compared to cigarette products, one important function is to suppress the filtering function while preventing the components contained in the flavor inhalation article 1 from falling off.

The filter 31 is formed of a sheet member that is folded, wrinkled, gathered, or the like, and is filled so as to ensure a passage path for the aerosol extending in the center line direction. Specifically, as shown in Fig. 3(A), the filter 31 is a paper filter in which the sheet member is filled so as to form voids along the longitudinal direction of the filter section 30, and the sheet member is gathered. Here, "gathered" means that the sheet member is filled in a state where it is folded back multiple times horizontally to the center line direction of the filter 31.
The sheet member constituting the filter 31 may be one sheet or two or more sheets. In addition, it is not necessary to fold or pleat the filter, as long as an aerosol passageway extending in the center line direction is secured. Specifically, the filter 31 may be a paper filter filled with rectangular sheet members, as shown in Fig. 4(A). However, by subjecting the sheet member to a crimping treatment over its entirety, voids can be efficiently formed in the sheet member.
The crimping process is a process for forming wrinkles in a sheet. For example, the sheet to be treated can be crimped by passing the sheet between a pair of rollers having a plurality of protrusions on the surface thereof to form wrinkles on both the front and back surfaces of the sheet that extend perpendicular to the sheet conveying direction.

The filler 33 is placed in the paper filter (filter 31). The filler 33 is placed to adjust the flavor and taste, and although the placement of the filler 33 may restrict the flow path in the paper filter, it at least changes the flow path.
In this embodiment, the downstream (second) end of the filter section 30 is located at a position that is a predetermined distance or more from the downstream (second) end of the filler 33. This positional relationship makes it possible to suppress the formation of holes in the downstream end of the filter section 30, compared to a case in which the downstream end of the filter section 30 is located at a position that is not a predetermined distance from the end of the filler 33.
When the filler 33 has a flat surface at the downstream end, the above-mentioned predetermined distance is preferably 1/2×A×√3. Here, A is the diameter of the outer circumferential circle of the flat surface that the filler 33 has on the downstream side. When the shape of the flat surface is not a circle, a circle with the same area as the flat surface is assumed, and the diameter of the outer circumferential circle of the circle is set as the diameter of the outer circumferential circle. When the filler 33 is a hollow member, the downstream end of the filler 33 does not have a flat surface and is a gap. In that case, the diameter of the outer circumferential circle is calculated using a virtual plane formed by the downstream end of the filler. 1/2×A×√3 corresponds to the height of an equilateral triangle when the triangle is created with one side being the diameter of the outer circumferential circle.
In order to explain why 1/2×A×√3 is preferable, a manufacturing method of the filter portion 30 will be described with reference to FIG.
In the present embodiment, for ease of manufacture, four filter units 30 are manufactured at the same time. First, a sheet member having a size corresponding to four filters 31 is placed on a flat sheet of paper for the wrapping paper 35 having a length corresponding to four filter units while the sheet member is crimped. A filler 33 consisting of a hollow cylinder is placed on the crimped sheet member, and the wrapping paper 35 and the sheet member are rolled up to form a shape 300 in which four filter units 30 are continuous, as shown in Fig. 14(A). The filler 33 is filled in two places, left and right, inside the filter 31.
Next, the filter section is cut at three locations, indicated by dotted lines a, b, and c in the figure, to produce four filter sections 30-1 to 30-4 as shown in Figure 14(B). The filler 33 is cut in half during this cutting process, and each of the fillers is finally filled into each of the four filter sections 30-1 to 30-4. In order to prevent the hollow filler 33 from being exposed on the downstream side (second side) of the filter section 30, of the cut filter sections 30, the left side of the figure for filter sections 30-1 and 30-3 is used as the downstream side (second side) of the filter section 30, and the right side of the figure for filter sections 30-2 and 30-4 is used as the downstream side (second side).
The filter 31 has a high packing density where the filler 33 is disposed and a low packing density where it is not disposed, but the downstream side of the filler 33 where the filter 31 is not present is formed in a funnel-like shape. In a vertical cross-sectional view of the filter part, the distance from the filler 33 to a position where the filter 31 is not present is close to the height (1/2×A×√3) of an equilateral triangle whose base is the diameter of the outer circumferential circle on the plane of the downstream end of the filler 33, so that the predetermined distance is preferably 1/2×A×√3 as described above.
If the downstream end of the filter section 30 is positioned closer to the packing 33 than 1/2×A×√3, for example, if the filter section 30 is cut along the XIVC cross section in FIG. 14(B), holes that are not covered by the paper filter (filter 30) will be formed, as shown in FIG. 14(C), and the packing 33 will be visible from the outside. Furthermore, if the packing 33 is hollow, the inside of the packing 33 will also be visible from the outside, which is not preferable.

6(A) to 6(C) are schematic diagrams showing examples of the filler 33 as viewed from the side. The filler 33 is preferably elongated in order to be placed inside the paper filter, and shapes such as those shown in Fig. 6(B) and (C) are also possible, but it is preferable that at least the portion of the filler 33 that is placed at the downstream end of the filter section 30 is flat. As shown in Fig. 6(A), both ends may be flat.
The filler 33 may be either hollow or solid. The outer circumferential shape of the cross section of the filler 33 may be appropriately changed according to the shape of the product, and may be, for example, a circle, an ellipse, a polygon, or a polygon with rounded corners.
In addition, in a cross section, the ratio of the area of the filler 33 to the area of the filter portion 30 is not particularly limited, but may be 15% or more and 50% or less, and preferably 20% or more and 40% or less. When a plurality of fillers 33 are disposed in the filter 31, it is preferable that the ratio of the total area of the plurality of fillers 33 to the area of the filter portion 30 in one cross section is within the above range.

When the cross section of the filler 33 has a substantially circular outer periphery, its outer diameter can be changed as appropriate 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. The ratio of the outer diameter of the filler 33 to the outer diameter 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. When the cross section is not circular, the above outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter of the circle is applied.
Since the filler 33 is disposed in a paper filter, an elongated shape is preferable, and the cross-sectional shape may be changed appropriately according to the shape of the product, for example, a circle, an ellipse, a polygon, or a polygon with rounded corners. A hollow or solid cylindrical shape is preferable from the viewpoint of the appearance of the filler 33, and a hollow body is particularly preferable.

Here, a specific example of the configuration of the filler 33 will be described.
For example, the filler 33 is a tube formed by winding a sheet member containing the same material as the sheet member constituting the filter 31 so that the cross section of a cylinder or the like is hollow. Specifically, the filler 33 is a paper tube formed by winding paper. By using a paper tube for the filler 33, the material constituting the filler 33 can be substantially the same as that of the filter 31.

The filler 33 is a so-called spiral paper tube, which is a paper tube formed by bonding together a number of sheet members, including at least paper, and winding them in a spiral shape. The spiral paper tube manufacturing method makes it possible to easily form a paper tube with a circular cross section. By using a spiral paper tube for the filler 33, the strength of the filler 33 can be improved while suppressing the ratio of the area of the filler 33 to the area of the filter section 30. In addition, by combining and bonding sheet members containing fragrance components, flavor components, tobacco powder, etc. with paper, a new flavor and aroma can be imparted to the aerosol.

Alternatively, the filler 33 may be a paper tube formed by winding paper multiple times into a cylindrical shape, a so-called straight paper tube. In the manufacturing method of a straight paper tube, the amount of glue used to attach the paper can be reduced compared to the manufacturing method of a spiral paper tube.
The filler 33 may be a paper tube formed by stacking a plurality of sheet members including at least paper. By stacking a plurality of sheet members, the strength of the filler 33 can be maintained even when the basis weight of each of the sheet members is small.
The filler 33 is not limited to a paper tube formed by winding paper, but may be formed from a tube of synthetic resin or the like that already has a hollow cross section. The thickness of the filler 33 is not particularly limited, and for example, when multiple sheets are stacked, the total thickness may be 50 μm to 500 μm, or 100 μm to 250 μm. By setting the thickness in this range, deformation due to pressure from the paper filter packed around it can be suppressed.

The filler 33 is a hollow member with a hollow cross section, but is not limited to this configuration as long as the filtration rate is lower than that of the filter 31. The filler 33 may be formed from a solid member with a solid cross section, such as cellulose acetate fiber, which has a lower filtration rate than paper.

The shape of the end of the filler 33 in the center line direction is flat in the example shown in FIG. 1, but is not limited to this and does not have to be flat.
Fig. 7 is a diagram showing another example of the longitudinal section of the flavor inhalation article 1 according to the first embodiment, which is an example in which the base material 10 has a tip member 13 that prevents the aerosol source 11 from falling off from the end face on the first side of the base material 10. Fig. 7(A) is a diagram showing a longitudinal section of the flavor inhalation article 1 in which a filler 33 having a sharp tip on the second side is arranged, and (B) is a diagram showing a longitudinal section of the flavor inhalation article 1 in which a filler 33 having a width that decreases from the first side to the second side is arranged.
For example, the shape of the end of the filler 33 in the center line direction may be such that the end face on the first side of the filler 33 is flat and the end face on the second side of the filler 33 is sharp, as shown in Fig. 7(A). Also, for example, as shown in Fig. 7(B), the width of the filler 33 may be relatively smaller in the second side region than in the first side region.

FIG. 8 shows another embodiment of the filter section 30. As shown in FIG.
8 is a diagram showing another example of the vertical section of the flavor inhalation article 1 according to the first embodiment, and is an example in which the substrate portion 10 has a tip member 13 that prevents the aerosol source 11 from falling off from the end face on the first side of the substrate portion 10, as in FIG. 7. FIG. 8(A) is a diagram showing a state in which a filler 33 whose size in the center line direction is smaller than the filter 31 is located in the filter 31, and FIG. 8(B) is a diagram showing a state in which a plurality of fillers 33 are located in the filter 31. When a plurality of fillers 33 are located in the filter 31, the distance between the downstream end of the filter portion 30 and the filler 33 is determined by using the filler 33 at the downstream end of the filter portion 30 among the fillers 33. By arranging a plurality of fillers 33 and increasing the ratio of the filler 33 to the filter 31, the filtration rate of the aerosol by the filter portion 30 can be reduced while increasing the strength of the mouthpiece segment 50.

The filter 31 may include a crushable additive release container (e.g., a capsule) that includes a crushable shell such as gelatin. The form of the additive release container such as a capsule is not particularly limited and may be any known form. In the case of a capsule, when it is broken by a user before, during, or after use, it releases a liquid or substance (usually a flavoring agent) contained in the capsule, which is then carried by an aerosol during use of the stick and dispersed into the surrounding environment after use.
The form of the capsule is not particularly limited, and may be, for example, a fragile capsule, and its shape is preferably a sphere. The additive contained in the capsule may contain any additive, and in particular, it is preferable to contain a flavoring agent, a taste component, or a fragrance. In addition, one or more materials that help filter the aerosol may be added as an additive. The form of the additive is not particularly limited, and is usually a liquid or solid. The fragile capsule and its manufacturing method may be well known.
The flavoring agent may be, for example, menthol, spearmint, peppermint, fenugreek, clove, medium chain triglycerides (MCT), or the like, either alone or in combination.

The filter may further contain other components, such as inorganic fine powders (kaolin, talc, diatomaceous earth, quartz, calcium carbonate, barium sulfate, titanium oxide, alumina, etc.), heat stabilizers (salts of alkali or alkaline earth metals, etc.), colorants, whiteness improvers, oils, retention improvers, sizing agents, biodegradation or photodegradation promoters (anatase-type titanium oxide, etc.), natural polymers or their derivatives (cellulose powder, etc.). In addition to these filler materials, inorganic adsorbents such as activated carbon, sepiolite, palygorskite, zeolite, activated carbon fiber, activated alumina, sepiolite-mixed paper, silica gel, activated clay, permiculite, diatomaceous earth, pulp, various fibers, and polymeric porous bodies such as ion exchange resins can be used. The other components can be used alone or in combination of two or more.

[Substrate part 10]
As described above, the flavor inhalation article 1 further includes the tipping paper 40 that integrates the base material part 10, the cooling part 20, and the filter part 30 by winding them in a state in which they are arranged in this order in the center line direction. Here, the base material part 10 will be described.
The substrate 10 has an aerosol source 11 that generates steam that generates an aerosol when heated, and a cigarette paper 12 that covers the outer circumference of the aerosol source 11. The substrate 10 in FIG. 1 is an example of a substrate including an aerosol source. The substrate 10 is formed into a cylindrical shape by wrapping the aerosol source 11 around the cigarette paper 12. The aerosol source 11 may be derived from tobacco, such as a processed product in which tobacco shreds or tobacco raw materials are molded into a granular, sheet, or powder form. The aerosol source 11 may also include a non-tobacco-derived product made from a plant other than tobacco (e.g., mint, herbs, etc.). As an example, the aerosol source 11 may include a flavoring component such as menthol. When the inhalation device 100 is a medical inhaler, the aerosol source 11 may include a drug for the patient to inhale. The aerosol source 11 is not limited to a solid, and may be a liquid such as, for example, polyhydric alcohols such as glycerin and propylene glycol, and water. At least a portion of the substrate 10 is accommodated in an internal space 141 of the holding part 140 in a state in which the flavor inhalation article 1 is held by the holding part 140 shown in FIG.

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

(Equation 1)
Aspect ratio = h/w

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

The size h of the base material 10 in the center line direction can be changed appropriately according to the size of the product, but is usually 8 mm or more, and preferably 10 mm or more. The size h of the base material 10 in the center line direction is usually 70 mm or less, and preferably 30 mm or less.
In addition, in the center line direction, the ratio of the size h of the substrate 10 to the size of the flavor inhalation article 1 is not particularly limited, but from the viewpoint of the balance between the delivery amount and the aerosol temperature, it is usually 10% or more, preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more. In addition, the ratio of the size h of the substrate 10 to the size of the flavor inhalation article 1 is usually 80% or less, preferably 70% or less, more preferably 60% or less, even more preferably 50% or less, particularly preferably 45% or less, and most preferably 40% or less.

The amount of the aerosol source 11 contained in the base material 10 is not particularly limited, but may be 200 mg or more and 800 mg or less, and preferably 250 mg or more and 600 mg or less. This range is particularly suitable for a base material 10 having a circumference of 22 mm and a size in the center line direction of 20 mm.

Here, the aerosol source 11 including tobacco shreds will be described. The material of the tobacco shreds contained in the aerosol source 11 is not particularly limited, and known materials such as lamina and ribs can be used. In addition, the tobacco shreds may be made by crushing dried tobacco leaves to an average particle size of 20 μm to 200 μm to obtain tobacco shreds, homogenizing the shredded tobacco leaves, and processing the shredded tobacco into a sheet (hereinafter, also simply referred to as "homogenized sheet"). Furthermore, the aerosol source 11 may be filled with a homogenized sheet having a size approximately equal to the size of the center line direction of the substrate 10, which is shredded approximately horizontally to the center line direction of the substrate 10, to form a so-called strand type.
In addition, the width of the tobacco shreds is preferably 0.5 mm or more and 2.0 mm or less when filling the aerosol source 11 .

Various types of tobacco can be used for the tobacco leaves used to make the shredded tobacco and homogenized sheets. Examples include flue-cured tobacco, burley, orient, native tobacco, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures of these. Mixtures can be used by blending varieties appropriately to achieve the desired flavor. Details of tobacco varieties are disclosed in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009." There are several conventional methods for manufacturing homogenized sheets, that is, methods for grinding tobacco leaves and processing them into homogenized sheets. The first method is to produce a paper-making sheet using a papermaking process. The second method is to mix a suitable solvent such as water with ground tobacco leaves to homogenize them, and then cast the homogenized mixture thinly on a metal plate or metal plate belt and dry it to produce a cast sheet. The third method is to mix a suitable solvent such as water with ground tobacco leaves to homogenize them, and extrude the mixture into a sheet to produce a rolled sheet. Details of the types of homogenizing sheets are disclosed in the "Encyclopedia of Tobacco, 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, and is preferably 11% by mass or more and 13% by mass or less, based on the total amount of the aerosol source 11. Such a moisture content suppresses the occurrence of stains on the roll and improves the suitability of the base material 10 for rolling during its manufacture.

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

The aerosol source 11 may contain a flavoring. The type of flavoring is not particularly limited, and from the viewpoint of imparting a good flavor, menthol is particularly preferred. Moreover, these flavorings may be used alone or in combination of two or more kinds.
The filling density of the aerosol source 11 is not particularly limited, but is usually 250 mg/ ^cm3 or more, preferably 300 mg/ ^cm3 or more, from the viewpoint of ensuring the performance of the flavor inhalation article 1 and imparting a good flavor. 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 be made of a tobacco sheet. The number of sheets of the tobacco sheet may be one, or two or more.
In the case where the aerosol source 11 is composed of a single tobacco sheet, for example, a tobacco sheet having one side of the same size as the center line direction of the filling is folded back multiple times horizontally to the center line direction of the filling (so-called gathered sheet) is included. Also, a tobacco sheet having one side of the same size as the center line direction of the filling is rolled up in a direction perpendicular to the center line direction of the filling is included.

In the case where the aerosol source 11 is composed of two or more tobacco sheets, for example, multiple tobacco sheets, one side of which has a size approximately equal to the size of the center line direction of the filled material, are packed in a wound state in a direction perpendicular to the center line direction of the filled material so that they are arranged concentrically.
The term "concentrically arranged" refers to the arrangement in which the centers of all the tobacco sheets are located at approximately the same position. The number of tobacco sheets is not particularly limited, but examples include embodiments in which the number of tobacco sheets is 2, 3, 4, 5, 6, or 7.
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. Furthermore, the thicknesses of the tobacco sheets may be the same or different.
There are no limitations on the thickness of each tobacco sheet, but in terms of the balance between heat transfer efficiency and strength, the thickness is preferably 150 μm or more and 1000 μm or less, and more preferably 200 μm or more and 600 μm or less.

The aerosol source 11 can be manufactured by preparing a plurality of tobacco sheets of different widths, stacking them so that the width decreases from the first side to the second side to prepare a laminate, and passing the laminate through a winding tube to roll and mold it.
According to this manufacturing method, a plurality of tobacco sheets extend in the center line direction and are arranged concentrically around the center line CL.
In this manufacturing method, the laminate is preferably prepared so that a non-contact portion is formed between adjacent tobacco sheets after rolling. If there is a non-contact portion (gap) between multiple tobacco sheets where the tobacco sheets are not in contact, a flavor flow path can be secured to improve the delivery efficiency of the flavor components. On the other hand, heat from the heater can be transferred to the outer tobacco sheet via the contact portion of the multiple tobacco sheets, ensuring high heat transfer efficiency.
In order to provide non-contact portions between multiple tobacco sheets, methods that can be used to prepare a laminate include, for example, using an embossed tobacco sheet, laminating adjacent tobacco sheets without bonding their entire surfaces together, laminating adjacent tobacco sheets by bonding only a portion of the sheets together, or laminating adjacent tobacco sheets by lightly bonding their entire surfaces or a portion of the sheets together so that they can be peeled off after rolling and molding.
When preparing the base material 10 including the wrapping paper 12, the wrapping paper 12 may be disposed on the end face of the first side of the laminate.

A polyol such as glycerin, propylene glycol, 1,3-butanediol, etc. may be added to the tobacco sheet. The amount of such a polyol added to the tobacco sheet is preferably 5% by mass or more and 50% by mass or less, and more preferably 15% by mass or more and 25% by mass or less, based on the dry mass of the tobacco sheet.
The tobacco sheet can be appropriately produced by a known method such as papermaking, slurry, rolling, etc. The above-mentioned homogenized sheet can also be used.
In the case of papermaking, tobacco can be produced by a method including the following steps: 1) Dried tobacco leaves are roughly crushed and extracted with water to separate the water extract and residue. 2) The water extract is dried under reduced pressure and concentrated. 3) Pulp is added to the residue, which is then fiberized in a refiner and made into paper. 4) A concentrated liquid of the water extract is added to the paper-made sheet and dried to produce a tobacco sheet. In this case, a step of removing some components such as nitrosamines may be added (see JP-T 2004-510422).
In the case of the slurry method, the tobacco leaf can be produced by a method including the following steps: 1) mixing water, pulp, and a binder with crushed tobacco leaves; 2) spreading (casting) the mixture thinly and drying. In this case, a step of removing some of the components such as nitrosamines by irradiating the slurry of the water, pulp, binder, and crushed tobacco leaves with ultraviolet light or X-rays may be added.

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

The configuration of the cigarette paper 12 used in the base material 10 is not particularly limited and may be a common embodiment, for example one containing pulp as the main component. The pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing with non-wood pulp generally used in cigarette papers 12 for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto.
As the type of pulp, chemical pulp produced by the kraft cooking method, acidic/neutral/alkaline sulfite cooking method, soda salt cooking method, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc. can be used.

The pulp is used in the papermaking process using a Fourdrinier papermaking machine, a cylinder papermaking machine, a combined cylinder and short-circuit papermaking machine, etc., to adjust and homogenize the texture of the wrapping paper 12. 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 printing condition of the wrapping paper 12. In addition, papermaking internal additives such as aluminum sulfate, various anionic, cationic, nonionic, or amphoteric retention improvers, drainage improvers, and paper strength enhancers, 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 the cigarette paper 12 is, for example, usually 20 gsm or more, preferably 25 gsm or more, whereas the basis weight is usually 65 gsm or less, preferably 50 gsm or less, more preferably 45 gsm or less.
The thickness of the cigarette paper 12 is not particularly limited, and is usually 10 μm or more, preferably 20 μm or more, and more preferably 30 μm or more, from the viewpoints of rigidity, breathability, and ease of adjustment during papermaking. The thickness of the cigarette paper 12 is usually 100 μm or less, preferably 75 μm or less, and more preferably 50 μm or less.
The shape of the wrapping paper 12 for producing the base material 10 may be, for example, a square or a rectangle.
When used as the wrapping paper 12 for wrapping the aerosol source 11, the length of one side can be about 12 mm to 70 mm, the length of the other side can be 15 mm to 28 mm, the preferred length of the other side can be 22 mm to 24 mm, and the more preferred length can be about 23 mm. When wrapping the aerosol source 11 in the wrapping paper 12 in a cylindrical shape, for example, an end of the wrapping paper 12 and an end of the wrapping paper 12 on the opposite side are overlapped by about 2 mm in the circumferential direction and glued to form a cylindrical paper tube shape in which the aerosol source 11 is filled. The size of the rectangular wrapping paper 12 can be determined depending on the size of the base material 10.

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

Various auxiliaries other than the base paper and fillers may be added to the wrapping paper 12. For example, a water resistance improver may be added to improve water resistance. The water resistance improver includes a wet strength agent (WS agent) and a sizing agent. Examples of the wet strength agent include urea formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Examples of the sizing agent include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), highly saponified polyvinyl alcohol with a saponification degree of 90% or more, etc.
As an auxiliary, a paper strength enhancer may be added, for example, polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, polyvinyl alcohol, etc. In particular, it is known that the use of a very small amount of oxidized starch improves the air permeability (JP 2017-218699 A).

A coating agent may be added to at least one of the two surfaces of the wrapping paper 12, the front and back. There are no particular limitations on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred. Examples include alginic acid and its salts (e.g., sodium salts), polysaccharides such as pectin, cellulose derivatives such as ethyl cellulose, methyl cellulose, carboxymethyl cellulose, and nitrocellulose, starch and its derivatives (e.g., ether derivatives such as carboxymethyl starch, hydroxyalkyl starch, and cationic starch, and ester derivatives such as starch acetate, starch phosphate, and starch octenyl succinate).

[Cooling section 20]
The cooling unit 20 is disposed adjacent to the base material 10 and the filter unit 30, and is a member formed so that the cross section of a cylinder or the like is hollow (hollow) by wrapping the sheet 21 around it. The cooling unit 20 cools the steam generated by heating the base material 10 to generate an aerosol.
Specifically, the cooling section 20 is a paper tube formed by winding a sheet 21 made of paper. The cooling section 20 is a so-called spiral paper tube, which is a paper tube formed by bonding a plurality of sheets 21 including at least paper to each other and winding them in a spiral shape. The spiral paper tube manufacturing method makes it possible to easily form a paper tube having a circular cross section. By adopting a spiral paper tube for the cooling section 20, it is possible to improve the strength of the cooling section 20 while suppressing the area of the cooling section 20. In addition, by combining and bonding a sheet member containing a fragrance component, a flavor component, tobacco powder, etc. with paper, it is possible to impart a new flavor and taste to the aerosol.
Alternatively, the cooling unit 20 may be a paper tube formed by winding paper multiple times into a cylindrical shape, that is, a so-called straight paper tube. In the manufacturing method of a straight paper tube, the amount of glue used to attach the paper can be reduced compared to the manufacturing method of a spiral paper tube.
The cooling section 20 may be a paper tube formed by stacking a plurality of sheets 21 including at least paper. By stacking a plurality of sheets 21, the strength of the cooling section 20 can be maintained even when the basis weight of each of the sheets 21 is small.
The cross section of the cooling section 20 is substantially circular, and its outer diameter can be appropriately changed according to the size of the product, but is preferably approximately the same as the outer diameter of the filter 31 described below. If the cross section is not circular, the above outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter of the circle is applied.
The size of the cooling section 20 in the center line direction can be changed appropriately according to the size of the product, but is usually 5 mm or more, preferably 10 mm or more, and more preferably 15 mm or more. The size of the cooling section 20 in the center line direction is usually 35 mm or less, preferably 30 mm or less, and more preferably 25 mm or less. By setting the size of the cooling section 20 in the center line direction to the above-mentioned lower limit or more, a sufficient cooling effect can be ensured to obtain a good flavor, and by setting it to the above-mentioned upper limit or less, loss due to adhesion of the generated steam and aerosol to the sheet 21 can be suppressed.

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

The cooling section 20 is provided with 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. Examples of the hole shapes include polygonal, rounded polygonal, circular, and elliptical. The through-holes 60 are present in an area through which air can flow in from outside the flavor inhalation article 1, in other words, in an area that protrudes from the opening 142 when the flavor inhalation article 1 is held in the holding section 140 of the inhalation device 100.

The presence of the through-holes 60 allows the concentration of the inhaled flavor components and aerosol to be adjusted. In addition, the presence of a plurality of through-holes 60 allows air to flow from the outside into the cooling section 20 during inhalation, and the temperature of the steam and air flowing in from the substrate section 10 can be lowered. Furthermore, by providing the through-holes 60 in the cooling section 20 within a region of 4 mm or more from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, not only can the cooling capacity be improved, but also the retention of the product (product) generated by heating in the cooling section 20 can be suppressed, thereby improving the delivery amount of the product.
In addition, when the base material 10 is heated, the steam generated using the aerosol as a condensation nucleus is liquefied by contacting air from the outside and decreasing in temperature, thereby promoting the generation of the aerosol.

When the plurality of through holes 60 concentrically arranged in the cooling section 20 are treated as one through hole group, the number of through hole groups may be one or may be two or more. When two or more through hole groups are present, it is preferable not to provide a through hole group in a region less than 4 mm from the boundary between the cooling section 20 and the filter section 30 in the direction toward the cooling section 20, from the viewpoint of improving the delivery amount of the component generated by heating.
Furthermore, when the flavor inhalation article 1 is configured such that the base material section 10, the cooling section 20, and the filter section 30 are wound with tipping paper 40, the tipping paper 40 is preferably provided with an air hole at a position directly above the through hole 60 provided in the cooling section 20. When producing such a flavor inhalation article 1, the tipping paper 40 may be prepared and wound with an air hole that overlaps with the through hole 60, but from the viewpoint of ease of production, it is preferable to produce a flavor inhalation article 1 that does not have a through hole 60, and then open a hole that penetrates the cooling section 20 and the tipping paper 40 at the same time.

From the viewpoint of improving product delivery by heating, the region where the through holes 60 exist is not particularly limited as long as it is a region of 4 mm or more from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, but from the viewpoint of further improving product delivery, a region of 4.5 mm or more is preferable, a region of 5 mm or more is more preferable, and a region of 5.5 mm or more is even more preferable. Also, from the viewpoint of ensuring cooling function, the region where the through holes 60 exist is preferably a region of 15 mm or less from the boundary between the cooling section 20 and the filter section 30, more preferably a region of 10 mm or less, and even more preferably a region of 7 mm or less.

Furthermore, when the boundary between the cooling section 20 and the substrate section 10 is considered as a reference, if the size of the cooling section 20 in the center line direction is 20 mm or more, from the viewpoint of ensuring the cooling function, the region in which the through holes 60 exist is preferably a region of 5 mm or more from the boundary between the cooling section 20 and the substrate section 10 toward the cooling section 20, more preferably a region of 10 mm or more, and even more preferably a region of 13 mm or more. Furthermore, from the viewpoint of improving the delivery of the product by heating, the region in which the through holes 60 exist is preferably a region of 16 mm or less from the boundary between the cooling section 20 and the substrate section 10, more preferably a region of 15.5 mm or less, even more preferably a region of 15 mm or less, and particularly preferably a region of 14.5 mm or less.

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

[Tip Paper 40]
The tipping paper 40 is wrapped around the outer peripheral surfaces of the base material portion 10 , the cooling portion 20 , and the filter portion 30 .
The shape of the tipping paper 40 is not particularly limited and can be, for example, square or rectangular.
The basis weight of the tipping paper 40 is not particularly limited, but is usually 32 gsm or more and 60 gsm or less, preferably 33 gsm or more and 55 gsm or less, and more preferably 34 gsm or more and 53 gsm or less.
The air permeability of the tipping paper 40 is not particularly limited, but is usually 0 Coresta units or more and 30,000 Coresta units or less, and preferably more than 0 Coresta units and 10,000 Coresta units or less. Here, "air permeability" is a value measured in accordance with ISO2965:2009, and is expressed as the flow rate ( ^cm3 ) of gas passing through an area of 1 ^cm2 per minute when the differential pressure between both sides of the paper is 1 kPa. 1 Coresta unit (1 Coresta unit, 1 C.U.) is ^cm3 /(min· ^cm2 ) under 1 kPa.

The configuration of the tipping paper 40 is not particularly limited and may be a general embodiment, for example, one in which pulp is the main component. The pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing non-wood pulp generally used in cigarette papers for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto. These pulps may be used alone or in combination in any ratio.
The type of pulp that can be used includes chemical pulp produced by the kraft cooking method, acidic/neutral/alkaline sulfite cooking method, soda salt cooking method, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc. The tip paper 40 may be produced by the above-mentioned production method or may be a commercially available product.

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

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

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

[Another embodiment of non-combustion heating type flavor inhalation article]
9 shows a second embodiment of the non-combustion heating type flavor inhalation article. In (A), another filter 32 is located upstream of the filter 31, and the filler 33 is located upstream of the filter 31. In (B), another filter 32 is located downstream of the filter 31, and the filler 33 is located upstream of the filter 31. In (C), another filter 32 is located downstream of the filter 31, and the filler 33 is located downstream of the filter 31.
9 shows an example of a flavor inhalation article 2 having a tip member 13 for preventing the aerosol source 11 from falling off from the end surface on the first side of the base material 10, and further having a separate filter 32 as a filter unit 230. The flavor inhalation article 2 differs from the embodiment of FIG. 8 in that the filter unit 230 corresponds to the filter unit 30. The following describes the differences from the embodiment of FIG. 8. The same reference numerals are used for the same parts in FIG. 8 and FIG. 9, and detailed descriptions thereof will be omitted.
The filter section 230 has a filter 31 which is a paper filter, a separate filter 32 which is an independent filter separate from the filter 31, a filler 33, and a wrapping paper 35 which is between the filter 31 and tipping paper 40 and which is wrapped around the outer circumferential surface of the filter 31. The filter section 230 is connected (coupled) to the cooling section 20 by winding the cooling section 20 and the filter section 230 together using the tipping paper 40. Note that it is preferable that the filter 31 and the separate filter 32 are each wound with a separate wrapping paper 35, and then wound together with yet another wrapping paper 35.
The cross section of the separate filter 32 of the filter unit 230 is substantially circular, and the outer diameter can be changed appropriately according to the size of the product, but can be 22 mm or more and 27 mm or less. If the cross section is not circular, the outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter of the circle is applied.
For example, the airflow resistance and the size in the center line direction of the filter unit 230 may be the same as the airflow resistance and the size in the center line direction of the filter unit 30. The shapes and dimensions of the filter 31 and the separate filter 32 can be appropriately adjusted so that the shape and dimensions of the filter unit 230 are within the above ranges.

The separate filter 32 is not particularly limited as long as it contains a filter material and has a general function of a filter. Examples of the general function of a filter include adjusting the amount of air mixed when inhaling an aerosol, reducing flavor, and reducing nicotine and tar, but it is not necessary for the filter to have all of these functions. In addition, in the non-combustion heating type flavor inhalation article 1, which tends to generate fewer components and has a lower filling rate of the aerosol source 11 compared to cigarette products, one of the important functions is to prevent the aerosol source 11 from falling off while suppressing the filtering function. The separate filter 32 may have a lower filtering rate and a higher hardness than the filter 31.
The filter material constituting the separate filter 32 is, for example, a filler material such as cellulose acetate fiber, nonwoven fabric, or pulp paper molded into a cylindrical shape. Alternatively, a paper filter filled with sheet-shaped pulp paper may be used. In addition to these filler materials, inorganic adsorbents such as activated carbon, sepiolite, palygorskite, zeolite, activated carbon fiber, activated alumina, sepiolite mixed paper, silica gel, activated clay, permiculite, and diatomaceous earth, pulp, various fibers, and polymeric porous bodies such as ion exchange resins may be used. A crushable additive release container (e.g., capsule) including a crushable outer shell such as gelatin may be included.
The packing density of the filter material is not particularly limited, but is usually from 90 mg/cm ³ to 360 mg/cm ³ , and preferably from 150 mg/cm ³ to 240 mg/cm ³ .

15A shows a vertical cross section of the flavor inhalation article 3 according to the third embodiment. Fig. 15(A) shows a state in which the filler 33 is located on the first side of the aerosol modifier 34, and Fig. 15(B) shows a state in which the filler 33 is located on the second side of the aerosol modifier 34, and the second side (downstream side) end of the filter section 330 is located at a position that is a predetermined distance or more from the end of the filler 33.
The flavor inhalation article 3 according to the third embodiment is different from the flavor inhalation article 1 according to the first embodiment in that it has a filter portion 330 corresponding to the filter portion 30. The differences from the first embodiment will be described below. The same components in the first and third embodiments are designated by the same reference numerals, and detailed descriptions thereof will be omitted.
The filter section 330 has a filter 31 which is a paper filter, a filler 33 which changes the flow path of the filter 31, an aerosol modifier 34 which modifies the aerosol, and a winding paper 35 which is present between the filter 31 and the tipping paper 40 and which is wound around the outer circumferential surface of the filter 31. The filter section 330 is connected (coupled) to the cooling section 20 by winding up the cooling section 20 and the filter section 330 together using the tipping paper 40. The winding paper 35 may not be provided.

The aerosol modifier 34 is disposed inside the filter portion 330 .
Although there are no particular limitations on the position of the aerosol modifier 34 in the vertical cross section of the filter section 330, it is preferable that the aerosol modifier 34 is arranged in a straight line in the center line direction with the filler 33. In other words, it is preferable that the aerosol modifier 34 is arranged in a straight line in the longitudinal direction of the filler 33 and the filter section 330.
Specifically, the aerosol modifier 34 is preferably disposed at a position corresponding to the filler 33, such as a position on the second side (downstream side) through which the aerosol that has passed through the filler 33 passes (see FIG. 15(A)) or a position where the aerosol that has collided with the aerosol modifier 34 passes through the filler 33. By disposing the aerosol modifier 34 at a position corresponding to the filler 33, the delivery efficiency of the modified aerosol can be improved. Also, as shown in FIG. 15(B), by disposing the aerosol modifier 34 on the first side (upstream side) of the filler 33 and in a straight line with the filler 33 in the center line direction, the modified aerosol can be passed through the filler 33 when inhaled.

The aerosol modifier 34 is, for example, a destructible capsule that releases its contents, including a flavor component, when an external force is applied.
The aerosol modifying agent 34 is preferably embedded in a position where the contents do not leak out from the first end face and the second end face of the filter 31. In other words, the aerosol modifying agent 34 is preferably disposed in a position where the diffusion of the contents is contained within the filter portion 330.
The aerosol modifier 34 includes a content containing at least one of a taste component and a flavor component, and a capsule body that holds the content. When the aerosol modifier 34 is crushed by a user, the capsule body is broken and the content therein is released. To crush means, for example, to pressurize the aerosol modifier 34, which is a breakable capsule, by pressing the wrapping paper 35 and the tipping paper 40 with the thumb and index finger.

As described above, in any of the embodiments, the filter unit 30 or the like for the flavor inhalation article includes a paper filter (filter 31) filled with a sheet member so as to form a gap in the longitudinal direction, and a filler 33 that is disposed in the paper filter and changes the flow path in the paper filter, and the downstream end of the filter unit 30 or the like is located at a position that is a predetermined distance or more from the end of the filler. With these configurations, it is possible to provide a filter unit for a flavor inhalation article that does not form a hole in the filter end.
Moreover, the non-combustion heating type flavor inhalation articles 1, 2, and 3 include a substrate 10 including at least an aerosol source 11. Usually, the flavor inhalation article 1 etc. further includes a cooling section 20 for cooling the steam generated by heating the substrate 10 to generate an aerosol, a filter section 30 through which the aerosol passes, and a tip paper 40 wound around the outer circumferential surface of the substrate 10, the cooling section 20, and the filter section 30. The filter section 30 includes a filter 31 which is a paper filter filled with a sheet member, and a filler 33 having a filtration rate lower than that of the filter 31 together with the filter 31. Note that the flavor inhalation article 1 does not need to include the cooling section 20 from the viewpoint of compacting the size in the center line direction. With these configurations, a flavor inhalation article without forming a hole at the filter end can be provided.

<Combustion heating type flavor inhalation article>
10 and 11 are diagrams showing a vertical cross section of a flavor inhalation article 4 according to the fourth embodiment.
The flavor inhalation article 4 according to the fourth embodiment has a different mode of use from the flavor inhalation article 1 according to the first embodiment. Also, the flavor inhalation article 4 according to the fourth embodiment is different from the flavor inhalation article 1 according to the first embodiment in a mouthpiece portion 450 corresponding to the mouthpiece segment 50 and a communication hole 460 corresponding to the through hole 60. The points that differ from the first embodiment will be described below. The same reference numerals are used for the same parts in the first embodiment and the fourth embodiment, and detailed descriptions thereof will be omitted.
The flavor inhalation article 4 is a combustion-type flavor inhalation article. It is used by burning an end face of a first side, which is opposite to a second side, which is an end side that a user holds in his mouth for inhalation. The aerosol source 11 included in the base member 10 generates steam from which an aerosol is generated by heating associated with combustion.
The cross section of the flavor inhalation article 4 is substantially circular, and its outer diameter can be appropriately changed according to the size of the product, but is usually 16 mm to 27 mm, and preferably 22 mm to 25 mm. When the cross section is not circular, the above outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter of the circle is applied.
The size of the flavor inhalation article 4 in the center line direction 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 portion 450 is composed of a filter portion 30 .
The size of the mouthpiece portion 450 in the center line direction can be changed appropriately 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.
Furthermore, the mouthpiece portion 450 is provided with a plurality of communication holes 460 arranged circumferentially and concentrically. The communication holes 460 are holes that allow air flowing in from an air hole provided in the tipping paper 40 to communicate with a gap in the filter 31. By adjusting the amount of air flowing in from the communication holes 460, the concentration of the aerosol inhaled by the user can be adjusted.

In addition, when the filter section 30 of the mouthpiece section 450 is configured such that the filter 31 is wrapped with the wrapping paper 35 and the tipping paper 40, it is preferable that at least the wrapping paper 35 has a communication hole 460 at a position corresponding to the air hole provided in the tipping paper 40. When producing a flavor inhalation article 4 having such a mouthpiece section 450, the tipping paper 40 may be wrapped so that the communication hole 460 and the air hole provided in the tipping paper 40 overlap, but from the viewpoint of ease of production, it is preferable to produce a flavor inhalation article 4 that does not have a communication hole 460, and then open a hole that penetrates the mouthpiece section 450 and the tipping paper 40 at the same time.

From the viewpoint of improving the efficiency of air inflow, it is preferable that the area in which the communication hole 460 exists is an area of the filter 31 in which the packing density of the sheet material constituting the filter 31 is relatively low, in other words, an area of the filter 31 in which the filler 33 is not arranged.
In the example shown in Fig. 11(A), the filler 33 smaller than the size of the filter 31 in the center line direction is located at the center of the filter 31, and the communication hole 460 is provided in a region of the filter 31 where the filler 33 is not disposed. Specifically, the communication hole 460 is provided in a region upstream of the filler 33. In the example shown in Fig. 11(B), one of the fillers 33 is located at an end of the first side (substrate portion 10 side) in the filter 31, and the other filler 33 is located at a distance from the end of the filter 31 on the second side (downstream side), and the communication hole 460 is provided in a region between the two fillers 33.
The communication hole 460 is not limited to the above-mentioned configuration as long as it is provided in an area of the filter 31 where the filler 33 is not disposed.

12 and 13 are diagrams showing a longitudinal section of the flavor inhalation article 5 according to the fifth embodiment. Fig. 12(A) shows a state in which the filler 33 is located on a first side in the filter 31, and Fig. 12(B) shows a state in which the filler 33 is located on a second side in the filter 31.
The flavor inhalation article 5 according to the fifth embodiment is different from the flavor inhalation article 4 according to the fourth embodiment in that it has a filter part 530 corresponding to the filter part 30. The differences from the fourth embodiment will be described below. The same reference numerals are used for the same parts between the flavor inhalation article 4 and the flavor inhalation article 5, and detailed descriptions thereof will be omitted.

The filter section 530 has a filter 31 which is a paper filter, a separate filter 32 which is a filter separate and independent from the filter 31, a filler 33 having a filtration rate lower than that of the filter 31, and a winding paper 35 which is present between the filter 31 and the tipping paper 40 and is wound around the outer circumferential surface of the filter 31. The filter section 530 is connected (coupled) to the base material section 10 by winding the base material section 10 and the filter section 230 together using the tipping paper 40. It is preferable that the filter 31 and the separate filter 32 are each wound with a separate winding paper 35, and then wound together with another winding paper 35.
The configuration of the separate filter 32 of the filter section 530 can be, for example, the same as the separate filter 32 included in the filter section 230 according to the second embodiment. The shapes 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 530 fall within the above-mentioned ranges.

The filter section 530 has a separate filter 32 connected to the second side of the base section 10, and a filter 31 located on the second side of the separate filter 32. The separate filter 32 is located on the upstream side, and the filter 31 is located on the downstream side. As shown in FIG. 12(A), a filler 33 smaller than the size of the filter 31 in the center line direction may be disposed on the first side (upstream side) of the filter 31, and a communication hole 460 may be provided in the downstream region of the filler 33. Also, as shown in FIG. 12(B), a filler 33 smaller than the size of the filter 31 in the center line direction may be disposed on the second side (downstream side) of the filter 31, and a communication hole 460 may be provided in the upstream region of the filler 33.

The configuration of the filter unit 530 is not limited to the examples shown in FIGS. 12A and 12B, and the positional relationship between the filter 31 and the separate filter 32 may be changed.
Figure 13 is a diagram showing a vertical cross section of another flavor inhalation article 5 according to the fifth embodiment, in which (A) shows a state in which the filler 33 is located on a first side within the filter 31, and (B) shows a state in which the filler 33 is located on a second side within the filter 31.
The filter section 530 has a filter 31 connected to the second side of the base member 10 and another filter 32 located on the second side of the filter 31. The filter 31 is located on the upstream side, and the other filter 32 is located on the downstream side. As shown in FIG. 13A, a filler 33 smaller than the size of the filter 31 in the center line direction may be disposed on the first side (upstream side) of the filter 31, and a communication hole 460 may be provided in a downstream region with respect to the filler 33. Also, as shown in FIG. 13B, a filler 33 smaller than the size of the filter 31 in the center line direction may be disposed on the second side (downstream side) of the filter 31, and a communication hole 460 may be provided in an upstream region with respect to the filler 33.
As described above, in any of the embodiments, the filter unit 30 or the like for a flavor inhalation article includes a paper filter (filter 31) filled with a sheet member so as to form a gap in the longitudinal direction, and a filler 33 that is disposed in the paper filter and changes the flow path in the paper filter, and the downstream end of the filter unit 30 or the like is located at a position that is a predetermined distance or more from the end of the filler. With these configurations, it is possible to provide a filter unit for a flavor inhalation article and a flavor inhalation article that do not form a hole in the filter end.

<Summary>
The present disclosure includes the following configurations.
(1) A filter section for a flavor inhalation article, comprising: a paper filter filled with a sheet member so as to form a gap in the longitudinal direction; and a filler disposed within the paper filter for changing a flow path within the paper filter, the downstream end of the filter section being located at a position that is a predetermined distance or more from the end of the filler.
(2) The filter portion for a flavor inhalation article described in (1), wherein the filler has a flat surface, and the flat surface is disposed on the downstream end side.
(3) The filter portion for a flavor inhalation article according to (2), wherein the filling material is cylindrical in shape.
(4) The filter portion for a flavor inhalation article according to any one of (1) to (3), wherein the filler is a hollow member.
(5) A filter portion for a flavor inhalation article according to any one of (2) to (4), wherein the predetermined distance is ½×A×√3 (A is the diameter of the peripheral circle of the plane).
(6) The filter portion for a flavor inhalation article according to (4) or (5), wherein the hollow member includes at least paper.
(7) A filter portion for a flavor inhalation article described in any one of (4) to (6), wherein the hollow member is a straight paper tube made of paper rolled into a cylindrical shape or a spiral paper tube made of a strip of paper rolled obliquely.
(8) The filter portion for a flavor inhalation article described in any one of (1) to (7), wherein the paper filter is a filter in which the sheet member is gathered.
(9) The filter portion for a flavor inhalation article according to (1) or (8), wherein the paper filter is a filter obtained by subjecting the sheet member made of paper or nonwoven fabric to a crimping treatment.
(10) The filter portion for a flavor inhalation article according to any one of (1) to (9), wherein the packing density of the paper filter is 90 mg/ ^cm3 or more and 720 mg/ ^cm3 or less.
(11) A flavor inhalation article comprising a filter portion according to any one of (1) to (10) and a substrate portion including an aerosol source.
(12) The flavor inhalation article according to (11), which is a non-combustion heating type flavor inhalation article.
(13) The flavor inhalation article according to (11), wherein the flavor inhalation article is a combustion type flavor inhalation article.

1, 2...Non-combustion heating type flavor inhalation article, 4, 5...Combustion heating type flavor inhalation article, 10...Base material, 11...Aerosol source, 20...Cooling section, 30, 230, 330, 530...Filter section, 31...Filter, 32...Another filter, 33...Filling, 35...Wrapping paper, 40...Tipping paper, 50...Mouthpiece segment, 60...Through hole, 460...Communicating hole

Claims (13)

A filter portion for a flavor inhalation article,
a paper filter in which a sheet member is filled so as to form voids in the longitudinal direction;
A filler is disposed in the paper filter and changes a flow path in the paper filter;
Equipped with
The downstream end of the filter section is located at a position that is a predetermined distance or more from the end of the packing.
A filter part for a flavor inhalation article. The packing has a plane, and the plane is disposed on the downstream end side.
A filter portion for use in the flavor inhalation article according to claim 1. The packing is cylindrical in shape.
A filter portion for use in the flavor inhalation article according to claim 2. The filling material is a hollow member.
A filter portion for use in the flavor inhalation article according to claim 3. The predetermined distance is 1/2×A×√3 (A is the diameter of the circumferential circle of the plane),
A filter portion for use in a flavor inhalation article according to any one of claims 2 to 4. The hollow member includes at least paper.
A filter portion for use in a flavor inhalation article according to claim 4. The hollow member is a straight paper tube in which paper is wound into a cylindrical shape or a spiral paper tube in which a strip of paper is wound obliquely.
A filter portion for use in a flavor inhalation article according to claim 6. The paper filter is a filter in which the sheet member is gathered.
A filter portion for use in the flavor inhalation article according to claim 1. The paper filter is a filter in which the sheet member made of paper or nonwoven fabric is subjected to a crimping treatment.
A filter portion for use in the flavor inhalation article according to claim 1 or 8. The packing density of the paper filter is 90 mg/ ^cm3 or more and 720 mg/ ^cm3 or less.
A filter portion for use in a flavor inhalation article according to any one of claims 1 to 9. A filter unit according to any one of claims 1 to 10;
a substrate portion including an aerosol source;
A flavor inhalation article comprising: The flavor inhalation article according to claim 11, wherein the flavor inhalation article is a non-combustion heating type flavor inhalation article. The flavor inhalation article according to claim 11, wherein the flavor inhalation article is a combustion type flavor inhalation article.

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