Filter part for flavor inhalation article, and flavor inhalation article

Abstract

A filter part 30 for a flavor inhalation article comprises: a paper filter; and a filler 33 disposed within the paper filter, the filler 33 changing a flow path within the paper filter. The paper filter is a filter 31 in which a sheet member 31a is crimped. The basis weight of the sheet member 31a at a position corresponding to the filler 33 is less than the basis weight of the sheet member 31a at a position not corresponding to the filler 33.

Description

Filter portion for flavor inhalation article and flavor inhalation article

[0001] The present disclosure relates to a filter portion for a flavor inhalation article and the flavor inhalation article.

[0002] 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 base 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 base end of the tobacco rod and a second longitudinally extending portion of filter material at the 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.

[0003] Special Publication No. 2014-509872

[0004] In consideration of the environment, a paper filter may be used as a filter for a flavor inhalation article. 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 aerosol flavor is reduced more than in a filter using fibers such as cellulose acetate. To adjust the flavor, a filler may be placed in the flow path within the paper filter, but this filler causes variations in the packing density of the paper filter. The objective of the present disclosure is to prevent variations in the packing density of a paper filter when a paper filter is used in the filter portion of a flavor inhalation article and a filler is placed within the paper filter.

[0005] A first feature of the present disclosure, which was completed with this objective in mind, is a filter section for a flavor inhalation article, comprising a paper filter and a filler disposed within the paper filter and changing a flow path within the paper filter, the paper filter being a filter in which a sheet member has been crimped, and the basis weight of the sheet member at a position corresponding to the filler is smaller than the basis weight of the sheet member at a position not corresponding to the filler. A second feature is that the crimp strength of the sheet member may be greater at a position not corresponding to the filler than at a position corresponding to the filler. A third feature is that one or more holes may be formed in the sheet member at a position corresponding to the filler. A fourth feature is that the packing density of the sheet member in the longitudinal direction of the filter section may be within a range of 0.8 to 1.2 with respect to the average density of the entire filter section. A fifth feature is that the packing density of the sheet member is 80 mg / cm or less at a position not corresponding to the filler. ３ 380mg / cm or more ３ The following may be true. A sixth feature is that the sheet member may be paper or nonwoven fabric. A seventh feature is that the paper filter may be a filter filled with a sheet member. An eighth feature is that the paper filter may be a filter filled with the sheet member so as to form voids along the longitudinal direction of the filter section. A ninth feature is that the paper filter may be a filter in which the sheet member is gathered. A tenth feature is that the filter section has an end portion on the downstream side, and the end portion may be located at a position equal to or greater than a predetermined distance from an end of the filler. An eleventh feature is a flavor inhalation article including the filter section and a substrate portion including an aerosol source. A twelfth feature is that the flavor inhalation article may be a non-combustion-heating flavor inhalation article. A thirteenth feature is that the flavor inhalation article may be a combustion-type flavor inhalation article.

[0006] According to a first feature, a filter portion of a flavor inhalation article can be provided in which a paper filter is used in the filter portion of the flavor inhalation article and a filling material is placed in the paper filter, and the packing density of the paper filter does not vary. According to a second feature, a filter portion of a flavor inhalation article can be provided in which the sheet member flexibly wraps the filling material and the packing density of the paper filter does not vary. According to a third feature, a filter portion of a flavor inhalation article can be provided in which the packing density of the paper filter does not vary when compared between a position corresponding to the filling material and a position not corresponding to the filling material. According to a fourth feature, a filter portion of a flavor inhalation article can be provided in which the packing density of the paper filter varies little throughout the entire filter portion of the flavor inhalation article. According to a fifth feature, a filter portion of a flavor inhalation article can be provided in which a moderate smoking flavor is obtained and gaps are unlikely to occur when the filter is viewed from the downstream end face. According to a sixth feature, a filter portion of a flavor inhalation article can be provided that has suitable aerosol filtration performance. According to the seventh feature, it is possible to provide a filter portion of a flavor inhalation article that has suitable aerosol filtering performance and provides a suitable smoking flavor. According to the eighth feature, it is possible to provide a filter portion of a flavor inhalation article that is appropriately filled with a sheet member and provides a suitable smoking flavor. According to the ninth feature, it is possible to provide a filter portion of a flavor inhalation article that has high aerosol filtering ability. According to the tenth feature, it is possible to provide a filter portion of a flavor inhalation article in which a filler is arranged so that no holes are observed from the downstream end of the filter portion. According to the eleventh to thirteenth features, it is possible to provide a flavor inhalation article in which there is no variation in the packing density of the paper filter.

[0007] 1 is a diagram showing a longitudinal section of a non-combustion heating type flavor inhalation article according to the first embodiment; FIG. 2 is a schematic diagram showing an example of the configuration of an inhalation device according to the first embodiment; FIG. 3 is a diagram showing a cross section of a filter section of a non-combustion heating type flavor inhalation article according to the first embodiment, (A) is a diagram showing an example of a cross section of section I-I in FIG. 1, and (B) is a diagram showing an example of a cross section of section II-II in FIG. 1; FIG. 4 is a diagram showing another cross section of a filter section of a non-combustion heating type flavor inhalation article according to the first embodiment, (A) is a diagram showing a cross section of section I-I in FIG. 1, and (B) is a diagram showing another example of a cross section of section II-II in FIG. 1; FIG. 5 is a schematic diagram showing a filter section of a non-combustion heating type flavor inhalation article according to the first embodiment; FIG. 6 is a schematic diagram showing a state before the sheet member according to the first embodiment is filled into the filter section, (A) shows a part of a crimped sheet member, (B) shows an example of a sheet member having a plurality of holes, and (C) shows another example of a sheet member having a plurality of holes. 7A-7C are schematic diagrams illustrating a method for manufacturing a filter unit according to a first embodiment, where (A) is a longitudinal cross-section of the filter unit during manufacturing, (B) is a longitudinal cross-section of the filter unit after cutting, and (C) is a diagram illustrating an example of a cross-section of the XIVC-XIVC portion of FIG. 7B.

[0024] Figures 7A-7C are schematic diagrams illustrating a method for manufacturing a filter unit according to a first embodiment, where (A) is a longitudinal cross-section of a non-combustion heating type flavor inhalation article according to another aspect of the first embodiment, where (A) is a longitudinal cross-section of a flavor inhalation article in which a filler whose second side is pointed, and (B) is a longitudinal cross-section of a flavor inhalation article in which a filler whose width decreases from the first side to the second side is disposed.

[0025] Figures 7A-7C are schematic diagrams illustrating a method for manufacturing a filter unit according to a first embodiment, where (A) is a longitudinal cross-section of a non-combustion heating type flavor inhalation article in which a filler whose size in the centerline direction is smaller than the filter is disposed in the filter, and (B) is a diagram illustrating a state in which a plurality of fillers are disposed in the filter.

[0023] Figures 1A and 1B are longitudinal cross-sectional views of a non-combustion heating type flavor inhalation article according to a second embodiment, in which (A) shows a state in which the separate filter is located upstream of the filter and the filler is located upstream of the filter, (B) shows a state in which the separate filter is located downstream of the filter and the filler is located upstream of the filter, and (C) shows a state in which the separate filter is located downstream of the filter and the filler is located downstream of the filter.

[0024] Figures 1A and 1B are longitudinal cross-sectional views of a non-combustion heating type flavor inhalation article according to a third embodiment, in which (A) shows a state in which the filler is located on a first side of the aerosol modifier which is a second filler, and (B) shows a state in which the filler is located on a second side of the aerosol modifier which is the second filler.

[0023] Figure 1 is a diagram showing a longitudinal section of a combustion heating type flavor inhalation article according to a fourth embodiment. Figures 1A and 1B are diagrams showing a longitudinal section of a combustion heating type flavor inhalation article according to another aspect of the fourth embodiment, where (A) shows a state in which a filler is located at the center between the first and second sides of the filter, and (B) shows a state in which a plurality of fillers are located in the filter. Figures 1B and 1C are diagrams showing a longitudinal section of a combustion heating type flavor inhalation article according to a fifth embodiment, where (A) shows a state in which a filler is located on the first side of the filter, and (B) shows a state in which a filler is located on the second side of the filter. Figures 1B and 1C are diagrams showing a longitudinal section of a combustion heating type flavor inhalation article according to another aspect of the fifth embodiment, where (A) shows a state in which a filler is located on the first side of the filter, and (B) shows a state in which a filler is located on the second side of the filter.

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

[0009] <Non-Combustion Heating Type Flavor Inhalation Article> FIG. 1 is a diagram showing a longitudinal section of a non-combustion heating type flavor inhalation article 1 according to the first embodiment. FIG. 2 is a schematic diagram showing an example of the configuration of an inhalation device 100 according to the first embodiment. The non-combustion heating type flavor inhalation article 1 according to the first embodiment (hereinafter, may be referred to as the "flavor inhalation article 1") includes a substrate section 10 and a filter section 30. The flavor inhalation article 1 may also include a cooling section 20. The mouthpiece segment 50 may be held in the user's mouth during inhalation, and in the example of FIG. 1, includes the cooling section 20 and the filter section 30. 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 tipping paper 40 that integrates the substrate section 10, the cooling section 20, and the filter section 30 by being wound 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 that is inserted into the inhalation device 100 and is the upstream side in the flow of aerosol during inhalation. The second side is the opposite side to the first side and is the end side that the user holds in their mouth for inhalation and is the downstream side in the flow of aerosol during inhalation. Furthermore, 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."

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

[0011] The heating unit 121 heats the substrate 10 of the flavor inhalation article 1. The heating unit 121 is made of any material, such as metal or polyimide. For example, the heating unit 121 is configured in a film shape and is arranged to cover the outer periphery of the holding unit 140. When the heating unit 121 generates heat, the aerosol source 11 (not shown 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 is allowed to inhale. Thereafter, when the sensor unit 112 detects that a predetermined user input has been made, power supply may be stopped. As another example of usage, power may be supplied and aerosol may be generated during a period when the sensor unit 112 detects that the user has inhaled from the downstream filter unit 30.

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

[0013] [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 circumference can be changed as appropriate depending on the size of the product, but is typically 16 mm to 27 mm, and preferably 21 mm to 23 mm. If the cross section is not circular, the circumference is assumed to be a circle having the same area as the cross section, and the circumference of that circle is used. The size of the flavor inhalation article 1 in the center line direction can be changed as appropriate depending on the size of the product, but is typically 40 mm to 100 mm, and preferably 50 mm to 70 mm.

[0014] [Filter Section 30] The filter section 30, which is a feature of the flavor inhalation article 1 according to the first embodiment, will now 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 cross-sectional view taken along line II-II in FIG. 1, and (B) is a cross-sectional view 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 cross-sectional view taken along line II-II in FIG. 1, and (B) is a cross-sectional view taken along line II-II in FIG. 1. FIG. 5 is a schematic diagram showing the filter section of a non-combustion heating flavor inhalation article according to the first embodiment. The filter section 30 is formed in a columnar shape whose size in the centerline direction is greater than the width of its cross section. Therefore, the filter section 30 is arranged so that its longitudinal direction coincides with the centerline direction. The filter section 30 includes a filter 31 through which the aerosol passes, a filler 33 that changes the flow path within the filter 31, and a wrapper paper 35 that is located 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 integrally winding up the cooling unit 20 and the filter unit 30 using tipping paper 40 (see FIG. 1). Note that the wrapper paper 35 may not be provided.

[0015] The wrapping paper 35 may have one or more rows of adhesive-containing seams. The adhesive may include a hot-melt adhesive, and the hot-melt adhesive may further include polyvinyl alcohol. When the filter unit 30 is composed of two or more components, the wrapping paper is preferably formed by wrapping each of these two or more components together with another wrapping paper. The wrapping paper 35 may be made of any known material, and may contain a filler such as calcium carbonate. The thickness of the wrapping paper 35 is not particularly limited, but is typically 20 μm to 140 μm, preferably 30 μm to 130 μm, and more preferably 30 μm to 120 μm. The basis weight of the wrapping paper 35 is not particularly limited, but is typically 20 gsm to 100 gsm, preferably 22 gsm to 95 gsm, and more preferably 23 gsm to 90 gsm. The air permeability of the wrapping paper 35 is not particularly limited, but is usually from 0 to 30,000 Coresta units, and preferably from more than 0 to 10,000 Coresta units. The wrapping paper 35 may be coated or uncoated, but is preferably coated with a desired material from the viewpoint of imparting functions other than strength and structural rigidity.

[0016] The cross section of the filter 31 of the filter unit 30 is substantially circular, and its circumference can be changed as appropriate to suit the size of the product, but can be 22 mm or more and 25 mm or less. If the cross section is not circular, the circumference is assumed to be a circle having the same area as the cross section, and the circumference of that circle is used. The size of the filter unit 30 in the center line direction can be changed as appropriate to suit 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 unit 30 is not particularly limited, but is usually 0 mmH ２ O or more 100mmH ２ 0 or less, 10 mmH ２ O or more 80mmH ２It is preferable that the pressure is 10 mmH or less. ２ O or more 50mmH ２ It is more preferable that the airflow resistance is 0 or less. The airflow resistance is measured in accordance with the ISO standard method (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 flowed at a predetermined air flow rate (17.5 cc / min) from the first side to the second side in a state where air does not pass through the side surface of the filter unit 30. The unit is generally mmH ２ It is represented by O.

[0017] The filter 31 is a so-called paper filter, and is a paper filter in which voids 31b are formed as channels through which aerosols can pass in the centerline direction when a user inhales the flavor inhalation article 1. For example, the filter 31 is a paper filter formed by filling a sheet member 31a. Specifically, the filter 31 is a paper filter formed by filling the sheet member 31a so as to ensure a passage path for aerosols extending in the centerline direction. The material of the sheet member 31a constituting the filter 31 is not particularly limited as long as it can achieve the general functions of a filter. However, paper such as pulp paper or nonwoven fabric containing pulp as a main component is preferred, and paper is more preferred. Alternatively, the sheet member 31a constituting the filter 31 may be made of, for example, a polymer sheet, a metal sheet, or the like. Note that general functions of a filter include, for example, adjusting the amount of air mixed in when inhaling aerosols, reducing flavors, reducing nicotine and tar, etc., but it is not necessary for the filter to have all of these functions. Furthermore, in the non-combustion heating type flavor inhalation article 1, which tends to produce 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 detachment of the filler 33 contained in the flavor inhalation article 1 while suppressing the filtering function. The density of the sheet member 31a itself is 0.05 g / cm3 from the viewpoint of realizing the general function of a filter. ３ More preferably, 0.5 g / cm ３The lower limit of the thickness of the sheet member 31a is preferably 0.03 mm or more, more preferably 0.05 mm or more, and the upper limit is preferably 1.20 mm or less, more preferably 0.5 mm or less.

[0018] In this embodiment, the filter 31 is formed of a sheet member 31a that is folded, wrinkled, gathered, or the like, and is filled to ensure a passage path for aerosols extending in the centerline direction. Specifically, as shown in FIG. 3(A), the filter 31 is a paper filter in which the sheet member 31a is filled to form voids 31b along the longitudinal direction of the filter portion 30, and the sheet member 31a is gathered. Here, "gathered" means that the sheet member 31a is filled in a state where it is folded back multiple times horizontally in the centerline direction of the filter 31. The sheet member 31a constituting the filter 31 may be one sheet or two or more sheets. Furthermore, it does not need to be folded or pleated, as long as a passage path for aerosols extending in the centerline direction is ensured. Specifically, the filter 31 may be a paper filter filled with strip-shaped sheet members 31a, as shown in FIGS. 4(A) and 4(B), or may be a paper filter formed from a strip-shaped sheet member 31a. By crimping the entire sheet member 31a, voids can be efficiently formed in the sheet member 31a. The crimping process is a process of forming wrinkles in the sheet member. For example, by passing the sheet member to be treated between a pair of rollers having a plurality of protrusions on the surface, the sheet member can be crimped by forming wrinkles on both the front and back surfaces of the sheet member that extend perpendicular to the sheet member conveyance direction.

[0019] 6A and 6B are schematic diagrams showing the state of the sheet member 31a according to the first embodiment before it is packed into the filter section 30. (A) shows a portion of the crimped sheet member 31a, (B) shows an example of a sheet member 31a with multiple holes, and (C) shows another example of a sheet member 31a with multiple holes. As shown in FIG. 6A, the crimped sheet member 31a has multiple wrinkles (e.g., substantially parallel ridges, wavy shapes, etc.). When the sheet member 31a is packed into the filter section 30 so that the length direction of the wrinkles (the direction in which the ridges continue) coincides or nearly coincides with the centerline direction of the filter section 30, this is preferable because it allows efficient formation of voids 31b between the sheet members 31a. Note that the wrinkles resulting from the crimping process are typically small, measuring 0.5 mm or less, and are therefore not shown in any figures other than FIG. 6A. The packing density of the sheet member 31a constituting the filter 31 is not particularly limited, but from the viewpoint of the balance between the airflow resistance and the filtration rate, it is usually 90 mg / cm ３ 720mg / cm or more ３ The packing density of the sheet member 31a varies depending on the presence or absence of the filler 33. FIG. 5 is a schematic diagram showing a position of the filter portion 30 corresponding to the filler 33 of the filter 31 (region 301 where the filler 33 is disposed) and a position of the filter portion 30 not corresponding to the filler 33 of the filter 31 (region 302 where the filler 33 is not disposed). FIG. 3B shows a cross-sectional view of the filter portion of region 301, and FIG. 3A shows a cross-sectional view of the filter portion of region 302. In this embodiment, the difference in packing density of the sheet member 31a between region 301 and region 302 is reduced by the means described below. The packing density of the sheet member 31a in the position not corresponding to the filler 33 (region where the filler 33 is not disposed) is 80 mg / cm ３ 380mg / cm or more ３ The lower limit of the packing density of the sheet member 31a at the position corresponding to the filler 33 (the region where the filler 33 is disposed) is 80 mg / cm ３ More preferably, 150 mg / cm ３ The upper limit is 380 mg / cm ３ Preferably, it is less than 240 mg / cm ３The packing density of the sheet member 31a at a position not corresponding to the filler 33 (a region where the filler 33 is not placed) indicates the density of the volume actually filled with the sheet member 31a, excluding the volume where the filler 33 exists.

[0020] The packing density of the sheet member 31a in the filter section 30 varies depending on whether or not a filler 33 is present. The packing density of the sheet member 31a at a position corresponding to the filler 33 is significantly greater than the packing density at a position not corresponding to the filler 33, resulting in variation, because the sheet member 31a fills the space excluding the filler 33. Variations in packing density are undesirable because they can result in areas where the flavor and aroma are over-adjusted or under-adjusted. In this embodiment, to reduce this difference in packing density, the basis weight of the sheet member 31a at a position corresponding to the filler 33 (region 301 in FIG. 5 ) is set smaller than the basis weight of the sheet member 31a at a position not corresponding to the filler 33 (region 302 in FIG. 5 ). Specific methods for reducing variation in the packing density of the sheet member 31a include increasing the strength (crimp strength) of the crimping treatment of the sheet member 31a in region 302 or forming holes in the sheet member 31a in region 301. There are no particular limitations on the means for increasing the crimp strength, but preferred means include, when crimping the sheet member 31a, 1) deepening the grooves of the rollers used in the crimping process to deepen the wrinkles formed by crimping, for example, to between 0.1 mm and 1.2 mm, and more preferably between 0.1 mm and 1.0 mm; 2) deepening the wrinkles to create slits that are, for example, 70% or less of the thickness of the sheet member 31a; and 3) reducing the width of the grooves of the rollers used in the crimping process to, for example, 1.0 mm or less (narrowing the width while maintaining the same depth).

[0021] Examples of manufacturing methods for performing the crimping treatment by the above-mentioned means 1), 2), and 3) include a method of changing the rollers used for the crimping treatment between positions of the sheet member 31a corresponding to the filler 33 and positions not corresponding to the filler 33, and a method of performing the crimping treatment on the entire sheet member 31a and then performing the crimping treatment again only on positions not corresponding to the filler 33 to increase the crimp strength. Note that the basis weight of the sheet member 31a when the basis weight is adjusted by the crimping treatment is the weight per area of ​​the sheet member 31a in a state in which wrinkles formed by the crimping treatment are not smoothed out. By increasing the crimp strength of the positions not corresponding to the filler 33, the basis weight increases and the sheet member 31a becomes softer, allowing the filler 33 to be wrapped around when placed, thereby enabling the filler 33 to be stably placed within the filter section 30. Another preferred method is to provide one or more holes, usually multiple holes, and more preferably ten or more holes, in the positions (regions 301) of the sheet member 31a corresponding to the filler 33. Examples of the hole positions include an arrangement in which holes are provided in rows both vertically and horizontally, as shown in Figures 6(B) and 6(C), which are schematic diagrams of the sheet member 31a. In particular, arranging the holes diagonally with respect to the longitudinal direction of the filter section 30 (the horizontal direction in Figure 6(C)), as shown in Figure 6(C), is preferable because the filler 33 can fit into the rows formed by the holes. The diameter of the holes is preferably 1 mm or more and 5 mm or less, more preferably 1 mm or more and 3 mm or less, from the viewpoint of efficiently reducing the weight of the sheet member 31a and maintaining an appropriate strength of the sheet member 31a. Alternatively, sheet members 31a with different basis weights can be prepared and different sheet members 31a can be used in positions corresponding to the filler 33 and positions not corresponding to the filler 33. As described above, by making the basis weight of the sheet member 31a at a position corresponding to the filler 33 smaller than the basis weight of the sheet member 31a at a position not corresponding to the filler 33, the difference in packing density of the sheet member 31a between the position corresponding to the filler 33 of the filter 31 (region 301 where the filler 33 is arranged) and the position not corresponding to the filler 33 of the filter 31 (region 302 where the filler 33 is not arranged) is reduced.As a result of reducing the difference in packing density, it is possible to reduce variations in packing density of the sheet member 31a in the longitudinal direction of the filter unit 30 (the direction of the center line of the flavor inhalation article 1). That is, the range of packing density of the sheet member 31a in the longitudinal direction of the filter unit 30 is within a range of 0.8 to 1.2 relative to the average density of the entire filter unit 30. The packing density of the filter unit 30 in the longitudinal direction can be obtained by cutting the filter unit 30 into cross sections at predetermined lengths (e.g., 5 mm) in the longitudinal direction and determining the packing density of the sheet member 31a within the range of the predetermined lengths.

[0022] In addition, by adjusting the basis weight of the sheet member 31a, the basis weight of the sheet member 31a at the position corresponding to the filler 33 is set to 25 g / m ２ 35g / m or more ２ The sheet member 31a at the position not corresponding to the filler 33 has a basis weight of 30 g / m or less. ２ 45g / m or more ２ The difference in basis weight of the sheet member 31a between the position corresponding to the filler 33 and the position not corresponding to the filler 33 is preferably 0 g / m or less. ２ 15g / m or more ２ Preferably, the boundary position where crimping, hole punching, etc. to determine the basis weight is performed is the boundary position between region 301 and region 302 in Figures 6(B) and (C), i.e., the position corresponding to the end of filler 33 in the centerline direction. However, when filler 33 is placed on sheet member 31a, an alignment error may occur between sheet member 31a and filler 33, and the boundary between region 301 and region 302 in Figures 6(B) and (C) may be misaligned with the end of filler 33 in the centerline direction. The magnitude of the misalignment is preferably equal to or less than the distance from the end of filler 33 in the centerline direction equivalent to the diameter of filler 33, and preferably equal to or less than the radius of filler 33.

[0023] As described above, the filler 33 is disposed within the paper filter (filter 31). The filler 33 is disposed to adjust the flavor and aroma of the tobacco. While the placement of the filler 33 may restrict the flow path within the paper filter, it at least changes the flow path. In this embodiment, the downstream (second) end of the filter unit 30 is located at a predetermined distance or greater 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 unit 30 compared to when the downstream end of the filter unit 30 is not located at a predetermined distance from the downstream end of the filler 33. When the filler 33 has a flat surface at its downstream end, the predetermined distance is preferably 1 / 2 × A × √3. Here, A is the diameter of the outer circumferential circle of the flat surface of the filler 33 on the downstream side. If the shape of the flat surface is not circular, a circle with the same area as the flat surface is assumed, and A is the diameter of the outer circumferential circle of this circle. Furthermore, if the packing 33 is a hollow member, the downstream end of the packing 33 does not have a flat surface but is instead a gap, and in this case the diameter of the outer periphery is calculated using an imaginary plane formed by the downstream end of the packing. 1 / 2 × A × √3 corresponds to the height of an equilateral triangle when one side of the triangle is the diameter of the outer periphery.

[0024] To explain why ½×A×√3 is preferred, a manufacturing method for the filter unit 30 will be described with reference to FIG. 7 . FIG. 7 is a schematic diagram illustrating a manufacturing method for a filter unit according to the first embodiment, where (A) is a longitudinal cross-section of the filter unit 30 during manufacturing, (B) is a longitudinal cross-section of the filter unit 300 shown in (A) after cutting, and (C) is a cross-sectional view of an example of the XIVC-XIVC portion of (B). In this embodiment, for ease of manufacturing, four filter units 30 are manufactured simultaneously. First, a sheet member having a size corresponding to four filters 31 is placed on a single sheet of flat paper for the wrapper 35 having a length corresponding to four filter units, while crimping the sheet member. A filler 33 consisting of a hollow cylinder is placed on the crimped sheet member, and the wrapper 35 and sheet member are rolled up to form the filter unit 300, which is a series of four filter units 30, as shown in FIG. 7A . The filler 33 is filled in two locations, on the left and right sides, within the filter 31. Next, the filter section 300 is cut at three locations, indicated by dotted lines a, b, and c in FIG. 7A, to form four filter sections 30-1 to 30-4 as shown in FIG. 7B. The filler 33 is cut in half during this cutting process, and one half is ultimately filled into each of the four filter sections 30-1 to 30-4. 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).

[0025] The downstream side of the packing 33, where the filter 31 is not present, is formed in a funnel-like shape. In a longitudinal cross-sectional view of the filter unit, the distance from the packing 33 to the position where the filter 31 is not present is close to the height (½ × A × √3) of an equilateral triangle whose base is the diameter of the outer circumferential circle of the packing 33 in a plane at the downstream end of the packing 33. Therefore, as described above, the predetermined distance is preferably ½ × A × √3. If the downstream end of the filter unit 30 is positioned closer to the packing 33 than ½ × A × √3, for example, when the filter unit 30 is cut along the cross section of the XIVC-XIVC portion in FIG. 7(B), as shown in FIG. 7(C), holes not covered by the paper filter (filter 31) are formed, making the packing 33 visible from the outside. Furthermore, if the packing 33 is hollow, the interior of the packing 33 is also visible from the outside, which is undesirable.

[0026] The filler 33 preferably has a long, narrow shape when viewed from the side, since it will be placed inside the paper filter. Shapes like those shown in Figures 8(A) and 8(B) described below are also possible, but it is preferable that at least the portion of the filler 33 located at the first end of the filter section 30 be flat. As shown in Figure 1, both ends may be flat. The length of the filler 33 in the centerline direction of the filter 31 is preferably 3 mm to 25 mm, and particularly preferably 5 mm to 15 mm. The filler 33 may be either hollow or solid. However, since the filler 33 changes the flow path within the filter 31, if the filler 33 is a hollow member, at least one of the first end and the second end of the filler 33 in the centerline direction is preferably a closed shape, such as a flat surface, and it is not preferable that both the first and second ends are open. The outer peripheral shape of the cross section of the filler 33 can be modified as needed to suit the shape of the product, and may be, for example, a circle, an ellipse, a polygon, or a polygon with rounded corners. Furthermore, the ratio of the area of ​​the filler 33 to the area of ​​the filter portion 30 in the cross section is not particularly limited, but may be 15% to 50% or less, and preferably 20% to 40% or less. When multiple fillers 33 are disposed within the filter 31, the ratio of the total area of ​​the multiple fillers 33 to the area of ​​the filter portion 30 in one cross section is preferably within the above range. When the outer periphery of the filler 33 in the cross section is substantially circular, its circumference can be adjusted appropriately depending on the size of the product, but is typically 6 mm to 15 mm, and more preferably 9 mm to 11 mm. Furthermore, the ratio of the circumference of the filler 33 to the circumference of the filter 31 is typically 0.20 to less than 0.70, and more preferably 0.35 to 0.50. When the cross section is not circular, the circumference is assumed to be a circle having the same area as the cross section, and the circumference of that circle is used. The cross-sectional shape of the filler 33 can be changed appropriately according to the shape of the product, and is typically circular, but may also be elliptical, polygonal, or polygonal with rounded corners. From the viewpoint of the appearance of the filler 33, a hollow or solid cylindrical shape is preferred for the shape of the filler 33, and a hollow body is particularly preferred.

[0027] Here, a specific example of the configuration of the filler 33 will be described. For example, the filler 33 is a tube formed by wrapping a sheet member containing the same material as the sheet member constituting the filter 31 around the tube so that the cross section of the tube is hollow, such as a cylinder. Specifically, the filler 33 is a paper tube formed by wrapping paper around the tube. 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, formed by bonding multiple sheet members including at least paper together and spirally winding them. 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 reducing the ratio of the area of ​​the filler 33 to the area of ​​the filter portion 30. Furthermore, by combining and bonding a sheet member containing a fragrance component, a flavor component, tobacco powder, etc. with paper, a new flavor or taste 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. The manufacturing method for a straight paper tube allows for a smaller amount of glue to be used to attach the paper compared to the manufacturing method for a spiral paper tube. The filler 33 may also be a paper tube formed by stacking multiple sheet members, including at least paper. Stacking multiple sheet members allows the strength of the filler 33 to be maintained even when the basis weight of each sheet member is small.

[0028] The filler 33 is not limited to a paper tube formed by wrapping paper around it, but may be formed from a tube made of synthetic resin or the like that already has a hollow cross section. The thickness of the filler 33 is not particularly limited. For example, when multiple paper tubes or the like are stacked, the total thickness may be 50 μm to 500 μm, or 100 μm to 250 μm. This thickness can suppress deformation due to pressure from the surrounding paper filter. In the above description, the filler 33 is described as a hollow member with a hollow cross section. However, this configuration is not limited as long as it changes the flow path within the filter 31, for example, as long as it has a filtration rate lower than that of the filter 31. However, since the filler 33 changes the flow path within the filter 31 as described above, if the filler 33 is a hollow member, it is preferable that at least one of the first end and the second end of the filler 33 in the centerline direction has a closed shape, such as a flat surface. The filler 33 may be formed from a solid member having 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 may not be flat.

[0029] FIG. 8 shows another example of a longitudinal cross section of the flavor inhalation article 1 according to the first embodiment. (A) is a diagram showing a longitudinal cross section of a flavor inhalation article 1 in which a filler 33 having a sharp second side is disposed, and (B) is a diagram showing a longitudinal cross section of a flavor inhalation article 1 in which a filler 33 having a width that decreases from the first side to the second side is disposed. FIG. 8 shows an example in which the substrate 10 has a tip member 13 that prevents the aerosol source 11 from falling off from the end face of the first side of the substrate 10. For example, as shown in FIG. 8(A), the shape of the end of the filler 33 in the center line direction may be such that the end face of the first side of the filler 33 is flat and the end face of the second side of the filler 33 is sharp. Furthermore, for example, as shown in FIG. 8(B), the width of the filler 33 in the second side region may be relatively smaller than that in the first side region. In this example, although not shown in FIG. 8 , the sheet member 31 a of the paper filter is crimped, and the basis weight of the sheet member 31 a at a position corresponding to the filler 33 is made smaller than the basis weight of the sheet member 31 a at a position not corresponding to the filler 33.

[0030] FIG. 9 shows another example of an embodiment of the filter unit 30. FIG. 9 is a diagram showing another example of the longitudinal cross section of the flavor inhalation article 1 according to the first embodiment, in which the substrate unit 10 has a tip member 13 that prevents the aerosol source 11 from falling off from the first end face of the substrate unit 10, as in FIG. 8. FIG. 9(A) shows a state in which a filler 33 whose size in the center line direction is smaller than the filter 31 is positioned within the filter 31, and FIG. 9(B) shows a state in which multiple fillers 33 are positioned within the filter 31. When multiple fillers 33 are positioned within the filter 31, the distance between the downstream end of the filter unit 30 and the filler 33 is determined using the filler 33 at the downstream end of the filter unit 30. By arranging multiple fillers 33 and increasing the ratio of the filler 33 to the filter 31, the strength of the mouthpiece segment 50 can be increased while reducing the filtration rate of the aerosol by the filter unit 30. In this example, although not shown in FIG. 9 , the sheet member 31 a of the paper filter is crimped, and the basis weight of the sheet member 31 a at a position corresponding to the filler 33 is made smaller than the basis weight of the sheet member 31 a at a position not corresponding to the filler 33.

[0031] The filter 31 may also include a crushable additive release container (e.g., a capsule) including a crushable outer shell such as gelatin as another filler. The form of the additive release container, such as a capsule, is not particularly limited, and any known form may be adopted. When a capsule is broken by a user before, during, or after use, it releases a liquid or substance (usually a flavoring agent) contained therein. The liquid or substance is then carried by the aerosol while the stick is in use, and is dispersed into the surrounding environment after use. The form of the capsule is not particularly limited, and may be, for example, a frangible capsule, preferably spherical in shape. The additive contained in the capsule may include any additive, but preferably includes a flavoring agent, a flavoring agent, or a fragrance. One or more materials that aid in filtering the aerosol may also be added as an additive. The form of the additive is not particularly limited, but is typically a liquid or solid. The frangible capsule and its manufacturing method may be well known. Flavoring agents may include, for example, menthol, spearmint, peppermint, fenugreek, clove, medium-chain triglyceride (MCT), etc., and one or a combination of two or more of these may be used. The filter may also contain other ingredients, such as inorganic fine powders (kaolin, talc, diatomaceous earth, quartz, calcium carbonate, barium sulfate, titanium oxide, alumina, etc.), thermal stabilizers (alkali or alkaline earth metal salts, etc.), colorants, whiteness improvers, oils, retention aids, sizing agents, biodegradation or photodegradation promoters (anatase 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 porous polymers such as ion-exchange resins may also be used. The other components may be used alone or in combination of two or more.

[0032] [Substrate 10] As described above, the flavor inhalation article 1 further includes tipping paper 40, which integrates the substrate 10, cooling section 20, and filter section 30 by winding them in this order along the centerline. The substrate 10 will now be described. The substrate 10 includes an aerosol source 11 that generates vapor that generates an aerosol when heated, and a cigarette paper 12 that covers the outer periphery of the aerosol source 11. The substrate 10 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 in the cigarette paper 12. The aerosol source 11 may be derived from tobacco, such as a processed product obtained by molding tobacco shreds or tobacco raw material into granules, sheets, or powder. The aerosol source 11 may also include a non-tobacco-derived material made from plants other than tobacco (e.g., mint, herbs, etc.). For 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 contain a drug to be inhaled by a patient. Note that the aerosol source 11 is not limited to a solid, and may be, for example, a polyhydric alcohol such as glycerin or propylene glycol, or a liquid such as water. At least a portion of the base member 10 is accommodated in an internal space 141 of the holding member 140 when the flavor inhalation article 1 is held in the holding member 140 shown in FIG. 2 .

[0033] The substrate 10 formed by wrapping the aerosol source 11 in the wrapping paper 12 preferably has a cylindrical shape that satisfies the aspect ratio defined by the mathematical formula 1 of 1 or more.

[0034] (Equation 1) Aspect ratio = h / w

[0035] In Equation 1, w is the width of the cross section of the substrate 10, h is the size of the substrate 10 in the center line direction, and it is preferable that h≧w. The shape of the cross section is not limited and may be polygonal, rounded polygonal, circular, elliptical, etc., and the width w is the diameter when the cross section is circular, the major axis when the cross section is elliptical, or the diameter of the 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.

[0036] The size h of the substrate 10 in the centerline direction can be changed appropriately according to the size of the product, but is typically 8 mm or more, and preferably 10 mm or more. The size h of the substrate 10 in the centerline direction is typically 70 mm or less, and preferably 30 mm or less. The ratio of the size h of the substrate 10 to the size of the flavor inhalation article 1 in the centerline direction is not particularly limited, but from the viewpoint of the balance between the delivery amount and the aerosol temperature, it is typically 10% or more, preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more. The ratio of the size h of the substrate 10 to the size of the flavor inhalation article 1 is typically 80% or less, preferably 70% or less, more preferably 60% or less, even more preferably 50% or less, particularly preferably 45% or less, and most preferably 40% or less.

[0037] The content of the aerosol source 11 in the substrate 10 is not particularly limited, but may be 200 mg to 800 mg, and preferably 250 mg to 600 mg. This range is particularly suitable for a substrate 10 having a circumference of 22 mm and a size of 20 mm in the centerline direction.

[0038] Here, the aerosol source 11 containing tobacco shreds will be described. The material of the tobacco shreds contained in the aerosol source 11 is not particularly limited, and known materials such as lamina or ribs can be used. Alternatively, the aerosol source 11 may be a shredded tobacco shredder obtained by pulverizing dried tobacco leaves to an average particle size of 20 μm to 200 μm, homogenizing the shredded tobacco, and processing it into a sheet (hereinafter simply referred to as a "homogenized sheet"). Furthermore, the aerosol source 11 may be a strand type, in which a homogenized sheet having a size approximately the same as the size of the substrate 10 in the center line direction is shredded approximately parallel to the center line direction of the substrate 10 and filled with the shredded tobacco. The width of the tobacco shreds is preferably 0.5 mm to 2.0 mm when filled with the aerosol source 11.

[0039] Various types of tobacco can be used for the tobacco shreds and homogenized sheet production. Examples include flue-cured tobacco, burley, oriental tobacco, native tobacco, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures thereof. Mixtures can be used by appropriately blending varieties to achieve the desired flavor. Details of tobacco varieties are disclosed in the "Encyclopedia of Tobacco," published by the Tobacco Research Center on March 31, 2009. There are several conventional methods for producing homogenized sheets, i.e., grinding tobacco leaves and processing them into homogenized sheets. The first method is to produce a paper-making sheet using a papermaking process. The second method involves mixing a suitable solvent, such as water, with ground tobacco leaves to homogenize them, then casting a thin layer of the homogenized material onto a metal plate or metal belt and drying it to produce a cast sheet. The third method involves mixing a suitable solvent, such as water, with ground tobacco leaves to homogenize them, and extruding the mixture into a sheet to produce a rolled sheet. Details of the types of homogenizing sheets are disclosed in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."

[0040] The moisture content of the aerosol source 11 can be 10% by mass or more and 15% by mass or less, and is preferably 11% by mass or more and 13% by mass or less, based on the total amount of the aerosol source 11. Such a moisture content suppresses the occurrence of stains during rolling and improves the suitability for rolling up during the production of the base material 10.

[0041] The aerosol source 11 is not particularly limited and may contain extracts and / or their constituent components from various natural products depending on the intended use. Examples of extracts and / or their constituent components include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof. The content of the extracts and / or their constituent components in the aerosol source 11 is not particularly limited, and from the viewpoints of generating sufficient aerosol and imparting a favorable flavor, it is typically 5% by mass or more, and preferably 10% by mass or more, relative to the total amount of the aerosol source 11. Furthermore, the content of the extracts and / or their constituent components in the aerosol source 11 is typically 50% by mass or less, and preferably 15% by mass or more and 25% by mass or less.

[0042] 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. These flavorings may be used alone or in combination of two or more. The packing density of the aerosol source 11 is not particularly limited, but is usually 250 mg / cm from the viewpoint of ensuring the performance of the flavor inhalation article 1 and imparting a good flavor. ３ or more, preferably 300 mg / cm ３ The packing density of the aerosol source 11 is usually 400 mg / cm ３ or less, preferably 350 mg / cm ３ The following is the result.

[0043] The aerosol source 11 may also be composed of a tobacco sheet. The number of tobacco sheets may be one or more. When the aerosol source 11 is composed of a single tobacco sheet, for example, the tobacco sheet may be filled in a state where one side of the tobacco sheet has a size approximately equal to the size of the filling in the center line direction and is folded back multiple times horizontally to the center line direction of the filling (so-called gathered sheet). Another example is a state where the tobacco sheet has a size approximately equal to the size of the filling in the center line direction and is filled in a state where one side of the tobacco sheet has a size approximately equal to the size of the filling in the center line direction and is wound in a direction perpendicular to the center line direction of the filling.

[0044] In a case where the aerosol source 11 is composed of two or more tobacco sheets, for example, a plurality of tobacco sheets, each having a side approximately the same size as the centerline of the filling material, are wound in a direction perpendicular to the centerline of the filling material so as to be concentrically arranged. "Concentrically arranged" refers to an 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 two, three, four, five, six, or seven. The two or more tobacco sheets may all have the same composition or physical properties, or some or all of the tobacco sheets may have different compositions or physical properties. The thicknesses of the tobacco sheets may be the same or different. The thickness of each tobacco sheet is not limited, but is preferably 150 μm to 1000 μm, more preferably 200 μm to 600 μm, in terms of the balance between heat transfer efficiency and strength.

[0045] The aerosol source 11 can be manufactured by preparing a laminate of multiple tobacco sheets with different widths, stacking them so that the width decreases from the first side to the second side, and passing the laminate through a winding tube to roll and form it. According to this manufacturing method, the multiple tobacco sheets extend in the centerline direction and are arranged concentrically around the centerline CL. In this manufacturing method, the laminate is preferably prepared so that non-contact portions are formed between adjacent tobacco sheets after rolling and forming. The presence of non-contact portions (gaps) between multiple tobacco sheets, where the tobacco sheets do not contact, can ensure flavor flow paths and improve the delivery efficiency of flavor components. Meanwhile, heat from the heater can be transferred to the outer tobacco sheets via the contact portions between the multiple tobacco sheets, ensuring high heat transfer efficiency. In order to provide a non-contact portion between multiple tobacco sheets where the tobacco sheets do not come into contact, for example, a laminate can be prepared by using an embossed tobacco sheet, laminating adjacent tobacco sheets without bonding the entire surfaces of the sheets together, laminating adjacent tobacco sheets with only a portion of the sheets bonded together, or laminating adjacent tobacco sheets with only a light bonding of the entire surfaces or a portion of the sheets together so that they can be peeled off after rolling and molding. When preparing a substrate 10 including cigarette paper 12, the cigarette paper 12 may be placed on the end surface of the first side of the laminate.

[0046] Polyols such as glycerin, propylene glycol, and 1,3-butanediol may be added to the tobacco sheet. The amount of additive added to the tobacco sheet is preferably 5% by mass to 50% by mass, and more preferably 15% by mass to 25% by mass, based on the dry mass of the tobacco sheet. The tobacco sheet can be appropriately produced by known methods such as papermaking, slurry, and rolling. The homogenized sheet described above can also be used. In the case of papermaking, the tobacco sheet 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 and concentrated under reduced pressure. 3) Pulp is added to the residue, which is then fiberized in a refiner and then made into paper. 4) A concentrated solution of the 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-A-2004-510422). In the case of the slurry method, the tobacco sheet 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 into a thin layer and drying it. In this case, an additional step may be added in which the slurry of water, pulp, a binder, and crushed tobacco leaves is irradiated with ultraviolet light or X-rays to remove some of the components such as nitrosamines.

[0047] Alternatively, as described in International Publication No. 2014 / 104078, a nonwoven tobacco sheet can be produced by a method including the following steps: 1) mixing powdered tobacco leaves with a binder; 2) sandwiching the mixture between nonwoven fabrics; and 3) forming the laminate into a specific shape by thermal welding to obtain a nonwoven tobacco sheet. The types of tobacco leaves used as raw material in each of the above methods can be the same as those 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 relative to the total mass of the tobacco sheet. The tobacco sheet may also contain a binder, and examples of such binders include guar gum, xanthan gum, carboxymethylcellulose, and sodium salt of carboxymethylcellulose. The amount of binder is preferably 1% by mass or more and 10% by mass or less relative to the total mass of the tobacco sheet. The tobacco sheet may further contain other additives, such as fillers such as pulp.

[0048] The configuration of the cigarette paper 12 used in the substrate 10 is not particularly limited and can be any common embodiment, such as one containing pulp as the main component. Pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing non-wood pulp commonly used in cigarette papers 12 for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto. Pulp types that can be used include chemical pulp produced by kraft cooking, acidic, neutral, or alkaline sulfite cooking, soda cooking, etc., ground pulp, chemi-ground pulp, and thermomechanical pulp.

[0049] The cigarette paper 12 is produced using pulp in a papermaking process using a Fourdrinier paper machine, a cylinder paper machine, a combined cylinder / short-cylinder paper machine, or the like, by adjusting and uniforming the texture. If necessary, a wet strength agent may be added to impart water resistance to the cigarette paper 12, or a sizing agent may be added to adjust the printing quality of the cigarette paper 12. Furthermore, internal papermaking aids such as aluminum sulfate, various anionic, cationic, nonionic, or amphoteric retention aids, drainage aids, and paper strength agents, as well as papermaking additives such as dyes, pH adjusters, antifoaming agents, pitch control agents, and slime control agents may be added.

[0050] The basis weight of the base paper for the cigarette paper 12 is, for example, usually 20 gsm or more, and preferably 25 gsm or more. On the other hand, the basis weight is usually 65 gsm or less, preferably 50 gsm or less, and more preferably 45 gsm or less. The thickness of the cigarette paper 12 is not particularly limited, and from the viewpoints of rigidity, breathability, and ease of adjustment during papermaking, it is usually 10 μm or more, preferably 20 μm or more, and more preferably 30 μm or more. Furthermore, 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 cigarette paper 12 used to prepare the substrate portion 10 can be, for example, a square or a rectangle. When used as cigarette paper 12 for wrapping the aerosol source 11, the length of one side can be approximately 12 mm to 70 mm, and the length of the other side can be 15 mm to 28 mm, with the other side preferably being 22 mm to 24 mm, and more preferably being approximately 23 mm. When the aerosol source 11 is wrapped in the wrapping paper 12 into a cylindrical shape, for example, an end of the wrapping paper 12 and an end of the wrapping paper 12 on the opposite side are overlapped by about 2 mm in the circumferential direction and glued together to form a cylindrical paper tube shape filled with the aerosol source 11. The size of the rectangular wrapping paper 12 can be determined depending on the size of the base material 10.

[0051] In addition to the above-mentioned pulp, the cigarette paper 12 may contain a filler. The content of the filler 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, relative to the total mass of the cigarette paper 12. In the cigarette paper 12, within the preferred basis weight range (25 gsm or more and 45 gsm or less), the content of the filler 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 content of the filler is preferably 15% by mass or more and 45% by mass or less, and when the basis weight is 35 gsm or more and 45 gsm or less, the content of the filler is preferably 25% by mass or more and 45% by mass or less. As the filler, calcium carbonate, titanium dioxide, kaolin, etc. can be used, but calcium carbonate is preferably used from the viewpoint of enhancing flavor and whiteness, etc.

[0052] Various auxiliary agents other than the base paper and fillers may be added to the cigarette paper 12. For example, a water resistance improver may be added to improve water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea-formaldehyde resin, melamine-formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more. A paper strength agent may also be added as an auxiliary agent, such as polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, and polyvinyl alcohol. It is known that the use of a very small amount of oxidized starch in particular improves air permeability (see JP 2017-218699 A).

[0053] A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the wrapping paper 12. There are no particular limitations on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred. Examples of the coating agent include 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).

[0054] [Cooling Unit 20] The cooling unit 20 is disposed adjacent to the substrate unit 10 and the filter unit 30 and is formed so that the cross section of a cylinder or the like is hollow (hollow) by wrapping a sheet 21 around it. The cooling unit 20 cools the steam generated by heating the substrate unit 10 to generate an aerosol. Specifically, the cooling unit 20 is a paper tube formed by wrapping a sheet 21 made of paper around it. The cooling unit 20 is a so-called spiral paper tube, formed by bonding multiple sheets 21, each containing at least paper, to each other and spirally winding them. 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 cooling unit 20, the area of ​​the cooling unit 20 can be reduced while improving the strength of the cooling unit 20. Furthermore, by combining and bonding a sheet member containing a fragrance component, a flavor component, tobacco powder, etc. with paper, a new flavor or taste can be imparted to the aerosol. Alternatively, the cooling section 20 may be a so-called straight paper tube, formed by winding multiple layers of paper into a cylindrical shape. The manufacturing method for a straight paper tube allows for a smaller amount of glue to be used to attach the paper compared to the manufacturing method for a spiral paper tube. The cooling section 20 may also be a paper tube formed by stacking multiple sheets 21, each containing at least paper. By stacking multiple sheets 21, the strength of the cooling section 20 can be maintained even when the basis weight of each sheet 21 is small. The cross section of the cooling section 20 is substantially circular, and its circumference can be adjusted as needed to suit the size of the product, but is preferably approximately the same as the circumference of the filter 31 described below. If the cross section is not circular, the circumference is assumed to be a circle having the same area as the cross section, and the circumference of that circle is used. The size of the cooling section 20 in the centerline direction can be adjusted as needed to suit the size of the product, but is typically 5 mm or more, preferably 10 mm or more, and more preferably 15 mm or more. The size of the cooling portion 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 making the size of the cooling section 20 in the center line direction equal to or greater than the above-mentioned lower limit, a sufficient cooling effect can be ensured to obtain a good flavor, and by making it equal to or less than the above-mentioned upper limit, losses due to the generated steam and aerosol adhering to the sheet 21 can be suppressed.

[0055] 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 also not particularly limited and may be, for example, a material primarily composed of pulp, or a material primarily composed of any of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, cellulose acetate, and aluminum foil, or any combination thereof. The cooling section 20 is formed by wrapping 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 made of synthetic resin or the like that already has a hollow cross section.

[0056] The cooling unit 20 is provided with through-holes 60 (also referred to as "ventilation filters (Vf)" in the present technical field) in a circumferential and concentric manner. The through-holes 60 are holes that penetrate the sheet 21. Examples of the hole shapes include polygonal, rounded polygonal, circular, and elliptical. The through-holes 60 are present in an area through which air can flow in from the outside of the flavor inhalation article 1, in other words, in an area that protrudes from the opening 142 when the flavor inhalation article 1 is held in the holding unit 140 of the inhalation device 100.

[0057] The presence of the through-holes 60 allows the concentration of the inhaled flavor components and aerosol to be adjusted. Furthermore, the presence of multiple through-holes 60 allows air to flow into the cooling section 20 from the outside during inhalation, lowering the temperature of the steam and air flowing in from the substrate section 10. Furthermore, by positioning the through-holes 60 in the cooling section 20 within a region 4 mm or more from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, not only can the cooling capacity be improved, but the retention of the substance (product) generated by heating within the cooling section 20 can be suppressed, thereby improving the delivery amount of the product. Furthermore, when the substrate section 10 is heated, the steam generated using the aerosol as a condensation nucleus comes into contact with air from the outside, lowering its temperature and liquefying, thereby accelerating the generation of the aerosol.

[0058] 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, from the viewpoint of improving the delivery amount of components generated by heating, it is preferable that no through hole group be provided in a region less than 4 mm from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20. Furthermore, when the flavor inhalation article 1 is configured such that the substrate section 10, the cooling section 20, and the filter section 30 are wrapped with tipping paper 40, it is preferable that the tipping paper 40 has an air hole provided directly above the through hole 60 provided in the cooling section 20. When producing such a flavor inhalation article 1, tipping paper 40 having an air hole overlapping the through hole 60 may be prepared and wrapped, but from the viewpoint of ease of production, it is preferable to produce a flavor inhalation article 1 without a through hole 60, and then drill holes that pass through both the cooling section 20 and the tipping paper 40 at the same time.

[0059] From the viewpoint of improving product delivery by heating, the region where the through-holes 60 are present 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, it is preferably a region of 4.5 mm or more, more preferably a region of 5 mm or more, and even more preferably a region of 5.5 mm or more. Furthermore, from the viewpoint of ensuring cooling function, the region where the through-holes 60 are present is preferably a region of 15 mm or less, more preferably a region of 10 mm or less, and even more preferably a region of 7 mm or less from the boundary between the cooling section 20 and the filter section 30.

[0060] Furthermore, when the boundary between the cooling section 20 and the substrate 10 is used as a reference, if the size of the cooling section 20 in the centerline direction is 20 mm or more, the region where the through-holes 60 exist is preferably a region of 5 mm or more, more preferably a region of 10 mm or more, and even more preferably a region of 13 mm or more from the boundary between the cooling section 20 and the substrate 10 in the direction toward the cooling section 20, from the viewpoint of ensuring the cooling function. Furthermore, from the viewpoint of improving the delivery of the product by heating, the region where the through-holes 60 exist is preferably a region of 16 mm or less, more preferably a region of 15.5 mm or less, even more preferably a region of 15 mm or less, and particularly preferably a region of 14.5 mm or less from the boundary between the cooling section 20 and the substrate 10.

[0061] The through holes 60 are arranged so that the air inflow rate through the through holes 60 is 10% to 90% by volume when an automatic smoking machine is used to inhale at 17.5 ml / sec. This "air inflow rate" refers to the volumetric rate of air inflowing through the through holes 60, assuming that the volumetric rate of air inhaled from the mouth end is 100% by volume. The air inflow rate is preferably 50% to 80% by volume, and more preferably 55% to 75% by volume. 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, or by combining these selections. The air inflow rate can be measured using a roll quality measuring device (SODIMAX D74 / SODIM manufactured by SAS) in accordance with ISO 9512.

[0062] [Tipping Paper 40] The tipping paper 40 is wound around the outer peripheral surfaces of the substrate section 10, the cooling section 20, and the filter section 30. The shape of the tipping paper 40 is not particularly limited, and can be, for example, square or rectangular. The basis weight of the tipping paper 40 is not particularly limited, but is usually 32 gsm or more and 60 gsm or less, preferably 33 gsm or more and 55 gsm or less, and more preferably 34 gsm or more and 53 gsm or less. The air permeability of the tipping paper 40 is not particularly limited, but is usually 0 Coresta units or more and 30,000 Coresta units or less, and preferably more than 0 Coresta units and 10,000 Coresta units or less. Here, "air permeability" is a value measured in accordance with ISO2965:2009, and is the value of the air permeability measured in accordance with ISO2965:2009, and is the air permeability of an area of ​​1 cm per minute when the differential pressure between both sides of the paper is 1 kPa. ２ Flow rate of gas passing through (cm ３ 1 C.U. is expressed as cm under 1 kPa. ３ / (min cm ２ )

[0063] The composition of the tipping paper 40 is not particularly limited and can be any common form, such as one containing pulp as the main component. Pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by blending non-wood pulp commonly used in cigarette papers for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto. These pulps may be used alone or in any combination of two or more types in any ratio. Pulp forms include chemical pulp produced by kraft cooking, acidic, neutral, or alkaline sulfite cooking, soda cooking, ground pulp, chemi-ground pulp, and thermomechanical pulp. The tipping paper 40 may be produced by the above-mentioned production method or may be a commercially available product.

[0064] In addition to the materials described above, the tipping paper 40 may contain fillers, such as metal carbonates such as calcium carbonate and magnesium carbonate, metal oxides such as titanium oxide, titanium dioxide and aluminum oxide, metal sulfates such as barium sulfate and calcium sulfate, metal sulfides such as zinc sulfide, quartz, kaolin, talc, diatomaceous earth, gypsum, etc. In particular, it is preferable that the tipping paper 40 contains calcium carbonate from the viewpoints of improving whiteness and opacity and increasing the heating rate. Furthermore, these fillers may be used alone or in combination of two or more types.

[0065] In addition to the materials and fillers described above, the tipping paper 40 may contain various auxiliary agents. For example, the tipping paper 40 may contain a water resistance improver to improve water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea-formaldehyde resin, melamine-formaldehyde resin, 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.

[0066] A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the tipping paper 40. The coating agent is not particularly limited, but a coating agent that can form a film on the surface and reduce liquid permeability is preferred. A portion of the outer surface of the tipping paper 40 may be coated with a lip release material. The lip release material refers to a material configured to help the user easily separate the tipping paper 40 from the lips without substantial adhesion when the filter portion 30 of the flavor inhalation article 1 is held between the mouth and the lips. 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.

[0067] [Another Embodiment of Non-Combustion Heating Type Flavor Inhalation Article] Figure 10 shows a second embodiment of a non-combustion heating type flavor inhalation article. In Figure 10(A), a separate filter 32 is located upstream of the filter 31, and a filler 33 is located upstream of the filter 31. In Figure 10(B), the separate filter 32 is located downstream of the filter 31, and the filler 33 is located upstream of the filter 31. In Figure 10(C), the separate filter 32 is located downstream of the filter 31, and the filler 33 is located downstream of the filter 31. Figure 10 shows an example of a flavor inhalation article 2 in which the substrate 10 has a tip member 13 that prevents the aerosol source 11 from falling off from the first end face of the substrate 10, and further has a separate filter 32 as the filter unit 230. The flavor inhalation article 2 differs from the embodiment of Figure 9 in that the filter unit 230 corresponds to the filter unit 30. The following describes the differences from the embodiment of Figure 9. The same reference numerals are used for the same components in Figures 9 and 10, and detailed descriptions thereof will be omitted. The filter unit 230 includes a filter 31, which is a paper filter, a separate filter 32, which is a filter separate from the filter 31, a filler 33, and a wrapping paper 35 that is located between the filter 31 and tipping paper 40 and wrapped around the outer periphery of the filter 31. The filter unit 230 is connected (coupled) to the cooling unit 20 by integrally winding the filter unit 230 and the filter unit 230 using the tipping paper 40. It is preferable that the filter 31 and the separate filter 32 are each wrapped around a separate wrapping paper 35 and then wrapped together with another wrapping paper 35. The cross section of the separate filter 32 of the filter unit 230 is substantially circular, and its circumference can be changed appropriately depending on the size of the product, but can be 22 mm or more and 27 mm or less. If the cross section is not circular, the circumference is assumed to be a circle having the same area as the cross section, and the circumference of that circle is used. For example, the airflow resistance and size in the centerline direction of the filter unit 230 may be the same as the airflow resistance and size in the centerline direction of the filter unit 30. The shapes and sizes of the filter 31 and the additional filter 32 can be adjusted as appropriate so that the shape and size of the filter unit 230 fall within the above-mentioned ranges.

[0068] The separate filter 32 is not particularly limited as long as it contains a filter material and has the general functions of a filter. Typical filter functions include, for example, adjusting the amount of air mixed in when inhaling aerosols, reducing flavors, and reducing nicotine and tar, but it is not necessary for the filter 32 to have all of these functions. Furthermore, in the non-combustion heating flavor inhalation article 1, which tends to produce fewer components and have a lower filling rate of the aerosol source 11 compared to cigarette products, preventing the aerosol source 11 from falling off while suppressing the filtering function is also an important 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 may be, for example, a cylindrically shaped filler material such as cellulose acetate fiber, nonwoven fabric, or pulp paper. Alternatively, a paper filter filled with sheet-like 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, diatomaceous earth, pulp, various fibers, and polymeric porous materials such as ion exchange resins can be used. A crushable additive release container (e.g., capsule) containing a crushable outer shell such as gelatin may also be included. The packing density of the filter material is not particularly limited, but is typically 90 mg / cm. ３ 360mg / cm or more ３ or less, preferably 150 mg / cm ３ 240mg / cm or more ３ In this example as well, although not shown in Fig. 10, the sheet member 31a of the paper filter is crimped, and the basis weight of the sheet member 31a at a position corresponding to the filler 33 is made smaller than the basis weight of the sheet member 31a at a position not corresponding to the filler 33.

[0069] FIG. 11 shows a longitudinal cross section of a flavor inhalation article 3 according to a third embodiment. FIG. 11(A) shows a state in which the filler 33 is located on the first side of the aerosol modifier 34, which is the second filler, and FIG. 11(B) shows a state in which the filler 33 is located on the second side of the aerosol modifier 34, which is the second filler, and the second (downstream) end of the filter unit 330 is located at a predetermined distance or more from the end of the filler 33. The flavor inhalation article 3 according to the third embodiment differs from the flavor inhalation article 1 according to the first embodiment in that the filter unit 330 corresponds to the filter unit 30. 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 unit 330 includes a filter 31, which is a paper filter, a filler 33 that restricts the flow path of the filter 31, an aerosol modifier 34 that modifies the aerosol, and a wrapper paper 35 that is located between the filter 31 and the tipping paper 40 and is wrapped around the outer circumferential surface of the filter 31. The filter unit 330 is connected (coupled) to the cooling unit 20 by integrally winding up the cooling unit 20 and the filter unit 330 using tipping paper 40. The wrapper paper 35 may not be provided.

[0070] The aerosol modifier 34 is a second filler and is disposed inside the filter section 330. The position of the aerosol modifier 34 in the longitudinal cross section of the filter section 330 is not particularly limited, but it is preferably disposed linearly with the filler 33 in the centerline direction. In other words, it is preferable that the aerosol modifier 34 be disposed linearly with the filler 33 in the longitudinal direction of the filter section 330. Specifically, it is preferable that the aerosol modifier 34 be disposed in 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. 11A ), or a position where the aerosol that hits the aerosol modifier 34 passes through the filler 33 (see FIG. 11B ). Disposing the aerosol modifier 34 in a position corresponding to the filler 33 can improve the delivery efficiency of the modified aerosol. Furthermore, as shown in Figure 11 (B), an aerosol modifier 34 is arranged on the first side (upstream side) of the filler 33 and in a straight line in the center line direction with the filler 33, so that the modified aerosol can pass through the filler 33 when inhaled.

[0071] The aerosol modifier 34 is a breakable capsule that releases its contents, including a flavor component, when an external force is applied, for example. The aerosol modifier 34 is preferably embedded in a position that prevents the contents from leaking from the first end face and the second end face of the filter 31. In other words, the aerosol modifier 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 contents that include at least one of a flavor component and a flavor component, and a capsule body that holds the contents. When the aerosol modifier 34 is crushed by a user, the capsule body is crushed and the contents are released. Crushing refers to, for example, applying pressure to the aerosol modifier 34, which is a breakable capsule, by pressing the wrapper 35 and the tipping paper 40 with the thumb and index finger.

[0072] 10 and 11 , in any of the embodiments described above, the sheet member 31a of the paper filter is crimped, and the basis weight of the sheet member 31a at a position corresponding to the filler 33 is smaller than the basis weight of the sheet member 31a at a position not corresponding to the filler 33, thereby providing a filter portion of a flavor inhalation article with reduced variation in packing density within the filter 31. Furthermore, the non-combustion heating type flavor inhalation articles 1, 2, and 3 each include a substrate 10 including at least an aerosol source 11. Typically, the flavor inhalation article 1 and the like further include a cooling section 20 that cools vapor generated by heating the substrate 10 to generate an aerosol, a filter section 30 through which the aerosol passes, and tipping paper 40 wound around the outer peripheral surfaces of the substrate 10, the cooling section 20, and the filter section 30. The filter section 30 further includes a filter 31, which is a paper filter filled with a sheet member, and a filler 33, which, together with the filter 31, has a filtration rate lower than that of the filter 31. From the viewpoint of compacting the size in the centerline direction, the flavor inhalation articles 1, 2, and 3 may not have the cooling section 20. With these configurations, it is possible to provide a flavor inhalation article in which the variation in packing density within the filter is suppressed.

[0073] <Combustion-heating-type flavor inhalation article> Figures 12 and 13 are diagrams showing a longitudinal cross section of a flavor inhalation article 4 according to a fourth embodiment. The flavor inhalation article 4 according to the fourth embodiment differs from the flavor inhalation article 1 according to the first embodiment in terms of its usage pattern. Furthermore, the flavor inhalation article 4 according to the fourth embodiment differs from the flavor inhalation article 1 according to the first embodiment in terms of a mouthpiece portion 450 corresponding to the mouthpiece segment 50 and a communication hole 460 corresponding to the through-hole 60. Differences from the first embodiment will be described below. The same components in the first and fourth embodiments are designated by the same reference numerals, and detailed descriptions thereof will be omitted. The flavor inhalation article 4 is a combustion-type flavor inhalation article. It is used by burning the end face of a first side, which is opposite to a second side, which is the end held by the user for inhalation. The aerosol source 11 included in the base member 10 generates vapor from which an aerosol is generated by heating during combustion. The cross section of the flavor inhalation article 4 is substantially circular, and its circumference can be changed as appropriate depending on the size of the product, but is usually 16 mm to 27 mm, and preferably 22 mm to 25 mm. If the cross section is not circular, the circumference is assumed to be a circle having the same area as the cross section, and the circumference of that circle is used. The size of the flavor inhalation article 4 in the center line direction can be changed as appropriate depending on the size of the product, but is usually 60 mm to 120 mm, and preferably 80 mm to 100 mm.

[0074] The mouthpiece portion 450 is composed of the filter portion 30. The size of the mouthpiece portion 450 in the centerline direction can be changed as appropriate to suit the size of the product, but is typically 20 mm to 40 mm, and preferably 25 mm to 30 mm. The mouthpiece portion 450 also has a plurality of concentric communication holes 460 formed around its circumference. The communication holes 460 are holes that allow air flowing in from the air vents formed in the tipping paper 40 to communicate with the voids 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.

[0075] Furthermore, when the filter section 30 of the mouthpiece section 450 is configured such that the filter 31 is wrapped with a wrapper paper 35 and a tipping paper 40, it is preferable that at least the wrapper 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 drill a hole that passes through both the mouthpiece section 450 and the tipping paper 40 at the same time.

[0076] From the viewpoint of improving the efficiency of air inflow, the region where the communication hole 460 is present is preferably a region where the packing density of the sheet member constituting the filter 31 of the filter unit 30 is relatively low, in other words, a region of the filter 31 where the filler 33 is not disposed. In the example shown in Fig. 12, the filler 33, which is smaller than the size of the filter 31 in the center line direction, is located on the first side (substrate unit 10 side) within the filter 31, and the communication hole 460 is provided in the region of the filter 31 where the filler 33 is not disposed. Specifically, the communication hole 460 is provided in a region on the second side relative to the filler 33. 13(A), fillers 33 smaller than the size of the filter 31 in the center line direction are located at the center between the first side (substrate 10 side) and the second side within the filter 31, and a communication hole 460 is provided on the first side of the filter 31, and in Fig. 13(B), a plurality of fillers 33 are arranged within the filter, and specifically, fillers 33 smaller than the size of the filter 31 in the center line direction are located on the first side (substrate 10 side) and the second side within the filter 31, and a communication hole 460 is provided between the plurality of 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 no fillers 33 are arranged.

[0077] 14 and 15 are diagrams showing a longitudinal section of a flavor inhalation article 5 according to a fifth embodiment. Fig. 14(A) shows a state in which the filler 33 is located on the first side within the filter 31, and Fig. 14(B) shows a state in which the filler 33 is located on the second side within the filter 31. The flavor inhalation article 5 according to the fifth embodiment differs from the flavor inhalation article 4 according to the fourth embodiment in that it has a filter section 530 corresponding to the filter section 30. Differences from the fourth embodiment will be described below. The same components in the flavor inhalation article 4 and the flavor inhalation article 5 are designated by the same reference numerals, and detailed description thereof will be omitted.

[0078] The filter unit 530 includes a filter 31, which is a paper filter; a separate filter 32, which is a filter independent of the filter 31; a filler 33 having a filtration rate lower than that of the filter 31; and a wrapping paper 35 located between the filter 31 and the tipping paper 40 and wrapped around the outer periphery of the filter 31. The filter unit 530 is connected (coupled) to the substrate unit 10 by integrally winding the substrate unit 10 and the filter unit 230 using the tipping paper 40. Preferably, the filter 31 and the separate filter 32 are each wound around a separate wrapping paper 35, and then wound together around yet another wrapping paper 35. The configuration of the separate filter 32 of the filter unit 530 can be, for example, the same as the configuration of the separate filter 32 included in the filter unit 230 according to the second embodiment. The shapes and dimensions of the filter 31 and the separate filter 32 can be adjusted as appropriate so that the shape and dimensions of the filter unit 530 fall within the above-described ranges.

[0079] The filter unit 530 has a separate filter 32 connected to the second side of the base unit 10 and a filter 31 located on the second side of the separate filter 32. The separate filter 32 is located on the first side, and the filter 31 is located on the second side. As shown in FIG. 14(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 a region on the second side relative to the filler 33. Alternatively, as shown in FIG. 14(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 a region on the first side relative to the filler 33.

[0080] The configuration of the filter unit 530 is not limited to the examples shown in Figures 14(A) and (B), and the positional relationship between the filter 31 and the separate filter 32 may be changed. Figure 15 is a diagram showing a longitudinal section of another flavor inhalation article 5 according to the fifth embodiment, where (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 unit 530 has a filter 31 connected to the second side of the substrate unit 10 and a separate filter 32 located on the second side of the filter 31. The filter 31 is located on the first side, and the separate filter 32 is located on the second side. As shown in Figure 15(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) within the filter 31, and a communication hole 460 may be provided in a region on the second side relative to the filler 33. 15(B), a filler 33 smaller than the size of the filter 31 in the centerline direction may be disposed on the second side (downstream side) within the filter 31, and a communication hole 460 may be provided in an area upstream of the filler 33. The combustion-type flavor inhalation articles 4 and 5 described above each include a substrate 10 including at least an aerosol source 11, a filter unit 30, 530 through which the aerosol passes, and tipping paper 40 wound around the outer peripheral surfaces of the substrate 10 and the filter unit 30, 530. The filter unit 30, 530 further includes a filter 31 that is a paper filter, and a filler 33 that is a member disposed in the filter 31 and changes the flow path of the aerosol passing through the filter 31. In both embodiments, as in the first embodiment, although not shown in FIGS. 12 to 15, the paper filter is a filter 31 made of a crimped sheet member, and the basis weight of the sheet member 31a at a position corresponding to the filler 33 is smaller than the basis weight of the sheet member 31a at a position not corresponding to the filler. These configurations make it possible to provide a filter portion for a flavor inhalation article and a flavor inhalation article in which variations in packing density within the filter 31 are suppressed.

[0081] <Summary> The present disclosure includes the following configurations. (1) A filter unit for a flavor inhalation article, comprising: a paper filter; and a filler disposed within the paper filter to change a flow path within the paper filter, wherein the paper filter is a filter having a crimped sheet member, and wherein the basis weight of the sheet member at a position corresponding to the filler is smaller than the basis weight of the sheet member at a position not corresponding to the filler. (2) A filter unit for a flavor inhalation article according to (1), wherein the crimp strength of the sheet member is greater at a position not corresponding to the filler than at a position corresponding to the filler. (3) A filter unit for a flavor inhalation article according to (1) or (2), wherein one or more holes are formed in the sheet member at a position corresponding to the filler. (4) A filter unit for a flavor inhalation article according to any of (1) to (3), wherein the packing density of the sheet member in the longitudinal direction of the filter unit is within a range of 0.8 to 1.2 relative to the average density of the entire filter unit. (5) The packing density of the sheet member is 80 mg / cm in the area where the filler is not present. ３ 380mg / cm or more ３A filter section for a flavor inhalation article according to any one of (1) to (4), which is as follows: (6) A filter section for a flavor inhalation article according to any one of (1) to (5), in which the sheet member is paper or nonwoven fabric; (7) A filter section for a flavor inhalation article according to any one of (1) to (6), in which the paper filter is a filter filled with a sheet member; (8) A filter section for a flavor inhalation article according to any one of (1) to (7), in which the paper filter is a filter filled with the sheet member so as to form voids across the longitudinal direction of the filter section; (9) A filter section for a flavor inhalation article according to any one of (1) to (8), in which the paper filter is a filter in which the sheet member is gathered; (10) A filter section for a flavor inhalation article according to any one of (1) to (9), in which the filter section has an end on the downstream side, and the end is located at a position that is a predetermined distance or more from the end of the filling. (11) A flavor inhalation article comprising the filter unit according to any one of (1) to (10) and a base member including an aerosol source. (12) The flavor inhalation article according to (11), wherein the flavor inhalation article 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.

[0082] 1, 2... Non-combustion heating type flavor inhalation article, 4, 5... Combustion heating type flavor inhalation article, 10... Substrate portion, 11... Aerosol source, 20... Cooling portion, 30, 230, 330, 530... Filter portion, 31... Filter, 31a... Sheet member, 31b... Gap, 32... Another filter, 33... Filler, 35... Wrapping paper, 40... Tipping paper, 50... Mouthpiece segment, 60... Through hole, 460... Communicating hole

Claims

1. A filter section for an flavor inhalation article, comprising: a paper filter; and a filler disposed within the paper filter to change a flow path within the paper filter, wherein the paper filter is a filter having a sheet member that has been subjected to a crimping treatment, and the basis weight of the sheet member at a position corresponding to the filler is smaller than the basis weight of the sheet member at a position not corresponding to the filler.

2. The filter portion for a flavor inhalation article according to claim 1, wherein the crimp strength of the sheet member is greater at a position not corresponding to the filling than at a position corresponding to the filling.

3. The filter portion for a flavor inhalation article according to claim 1, wherein one or more holes are formed in the sheet member at positions corresponding to the filling.

4. The filter section for a flavor inhalation article according to claim 2 or 3, wherein the packing density of the sheet member in the longitudinal direction of the filter section is within a range of 0.8 to 1.2 with respect to the average density of the entire filter section.

5. The packing density of the sheet member is 80 mg / cm in a region where the filler is not present. ３ More than 380mg / cm ３ The filter portion for a flavor inhalation article according to claim 2 or 3, wherein:

6. The filter portion for a flavor inhalation article according to any one of claims 1 to 5, wherein the sheet member is paper or nonwoven fabric.

7. The filter portion for a flavor inhalation article according to any one of claims 1 to 6, wherein the paper filter is a filter filled with a sheet member.

8. The filter section for a flavor inhalation article according to claim 7, wherein the paper filter is a filter in which the sheet member is filled so as to form voids along the longitudinal direction of the filter section.

9. The filter portion for a flavor inhalation article according to any one of claims 1 to 8, wherein the paper filter is a filter in which the sheet member is gathered.

10. A filter unit for a flavor inhalation article as described in any one of claims 1 to 9, wherein the filter unit has an end portion on the downstream side, and the end portion is disposed at a position that is a predetermined distance or more from an end portion of the filling material.

11. A flavor inhalation article comprising: a filter portion according to any one of claims 1 to 10; and a base portion including an aerosol source.

12. The flavor inhalation article according to claim 11, which is a non-combustion heating type flavor inhalation article.

13. The flavor inhalation article according to claim 11, wherein the flavor inhalation article is a combustion type flavor inhalation article.

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