Filter portion for flavor inhalation article and flavor inhalation article

Abstract

A filter portion 30 for a flavor inhalation article comprises: a paper filter which is filled with a sheet member such that a void is formed over the length direction; and a hollow member 33 which is disposed in the paper filter along the length direction of the filter portion 30 and is lower in filtration rate than the paper filter. At least one end of the hollow member 33 is disposed at a position within a predetermined distance from a length-direction end of the filter portion 30.

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 taste is reduced more than in a filter using fibers such as cellulose acetate. A thin, hollow member may be disposed within the paper filter to adjust the flavor taste and the hardness of the filter portion. It is preferable that the hollow member be large enough to penetrate the filter in the longitudinal direction, but it is difficult to dispose a hollow member large enough to penetrate within the paper filter in manufacturing. The objective of the present disclosure is to achieve both delivery efficiency and ease of manufacturing when a thin, hollow member is disposed within the filter portion of a flavor inhalation article.

[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 filled with a sheet member to form voids along the longitudinal direction; and a hollow member disposed within the paper filter along the longitudinal direction of the filter section and having a filtration rate lower than that of the paper filter, wherein at least one end of the hollow member is disposed within a predetermined distance from the longitudinal end of the filter section. A second feature is that one end of the hollow member may be within a predetermined distance from the downstream end of the filter section, and the other end may have an opening disposed on the upstream end of the filter section. A third feature is that the predetermined distance may be ½ × A × √3 (A is the diameter of the outer circumferential circle of the opening). A fourth feature is that the hollow member may include at least paper. A fifth feature is that the hollow member may be a straight paper tube formed by winding paper into a cylindrical shape or a spiral paper tube formed by winding a strip of paper obliquely. A sixth feature of the present invention is that the paper filter may be a filter in which the sheet member is gathered. A seventh feature of the present invention is that the paper filter may be a filter in which a sheet member made of paper or nonwoven fabric is subjected to a crimping treatment. An eighth feature of the present invention is that the sheet member is subjected to a crimping treatment along the longitudinal direction of the filter portion. A ninth feature of the present invention is that the packing density of the sheet member is 105 mg / cm at the location where the hollow member is present. ３ 720mg / cm or more ３ A tenth feature is that the ratio of the outer diameter of the hollow member to the outer diameter of the paper filter may be 0.2 or more and less than 0.7. An eleventh feature is that the airflow resistance of the paper filter is 0 [mmH ２ O / 10mm] or more 20[mmH ２ A twelfth feature is a flavor inhalation article including the filter unit and a substrate unit including an aerosol source. A thirteenth feature is that the flavor inhalation article may be a non-combustion heating type flavor inhalation article. A fourteenth feature is that the flavor inhalation article may be a combustion type flavor inhalation article.

[0006] According to the first feature, a filter portion of a flavor inhalation article can be provided that achieves both high delivery efficiency and ease of manufacturing, compared to when the hollow member is not located within a predetermined distance from the longitudinal end of the filter portion. According to the second feature, a filter portion of a flavor inhalation article can be provided that has excellent delivery efficiency, compared to when one end of the hollow member is located beyond a predetermined distance from the downstream end of the filter portion. According to the third feature, a filter portion of a flavor inhalation article can be provided that has excellent delivery efficiency, compared to when the predetermined distance exceeds 1 / 2 × A × √3 (A is the diameter of the outer circumferential circle of the opening). According to the fourth feature, a filter portion of a flavor inhalation article can be provided in which the material constituting the hollow member is similar to that of a paper filter, compared to when the hollow member does not contain paper. According to the fifth feature, a filter portion of a flavor inhalation article can be provided, in which, compared to when the hollow member is not composed of a straight paper tube formed by winding paper into a cylindrical shape or a spiral paper tube formed by winding a strip of paper obliquely, even a paper with a small basis weight can be used for the hollow member, which has good formability and excellent strength for the finished hollow member. According to the sixth feature, a filter portion of a flavor inhalation article can be provided, in which the sheet member is a filter that is not gathered. According to the seventh feature, a filter portion of a flavor inhalation article can be provided, in which the aerosol filtering ability is high compared to when the paper filter is not crimped. According to the eighth feature, a filter portion of a flavor inhalation article can be provided, in which the aerosol filtering ability is high compared to when the paper filter is not crimped. According to the ninth feature, a paper filter has a packing density of 105 mg / cm or more in a region where the hollow member is not present. ３ The hardness of the filter portion is excellent, and the hardness is 720 mg / cm ３According to a tenth feature, it is possible to provide a filter portion of a flavor inhalation article that does not over-filter aerosol components, compared to when the ratio of the outer diameter of the hollow member to the outer diameter of the paper filter is less than 0.2 or 0.7 or greater. According to an eleventh feature, it is possible to provide a filter portion of a flavor inhalation article that can maintain the delivery amount while filtering aerosols ... ２ In comparison with a case where the length of the hollow member is not within a predetermined distance from the longitudinal end of the filter portion, a flavor inhalation article can be provided that does not form a hole in the filter end and that does not adversely affect the smoking taste. According to the twelfth to fourteenth features, a flavor inhalation article can be provided that achieves both high delivery efficiency and ease of manufacture, compared with a case where the hollow member is not within a predetermined distance from the longitudinal end of the filter portion.

[0007] FIG. 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 part of a non-combustion heating type flavor inhalation article according to another example of the first embodiment. FIG. 4 is a schematic diagram showing a filter part of a non-combustion heating type flavor inhalation article according to the first embodiment. FIG. 5 is a schematic diagram explaining a filter part of a non-combustion heating type flavor inhalation article according to the first embodiment. FIG. 6 is a diagram showing a longitudinal section of a non-combustion heating type flavor inhalation article according to another embodiment. FIG. 7 is a diagram showing a longitudinal section of a non-combustion heating type flavor inhalation article according to another embodiment. FIG. 8 is a diagram showing a longitudinal section of a non-combustion heating type flavor inhalation article according to another embodiment. FIG. 9 is a diagram showing a longitudinal section of a combustion heating type flavor inhalation article according to the second embodiment. FIG. 10 is a diagram showing a longitudinal section of a combustion heating type flavor inhalation article according to the second embodiment. FIG. 11 is a diagram showing a longitudinal section of a combustion heating type flavor inhalation article according to another embodiment.

[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, a cooling section 20, and a filter section 30. 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, 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 outer diameter 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 outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter 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. The filter section 30 is formed in a columnar shape whose size in the centerline direction is greater than the width of the cross section. Therefore, the filter section 30 is disposed so that its longitudinal direction coincides with the centerline direction. The filter section 30 includes a filter 31 through which the aerosol passes, a hollow member 33 having a filtration rate lower than that of the filter 31, and a wrapper paper 35 located between the filter 31 and the tipping paper 40 and wrapped around the outer peripheral 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 outer diameter can be changed as appropriate to fit 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 outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter of that circle is used. The size of the filter unit 30 in the center line direction can be changed as appropriate to fit 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.

[0017] The airflow resistance per 10 mm of the size in the center line direction of the filter part 30 is not particularly limited, but is usually 0 mmH ２ O or more 20mmH ２It is 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.

[0018] The filter 31 is a paper filter formed by filling a sheet member so that voids through which aerosols can pass are formed along the longitudinal direction. In other words, the filter 31 is a paper filter formed by filling a sheet member so as to ensure a passage path for aerosols extending in the center line direction. The packing density of the sheet member constituting the filter 31 is not particularly limited, but is usually 90 mg / cm. ３ More than 720g / cm ３ The packing density of the sheet member differs depending on whether or not hollow members 33 are present. Fig. 5 shows, as a schematic diagram, a region 301 in the filter section 30 where no hollow members 33 are arranged in the cross section of the filter 31, and a region 302 in which hollow members 33 are arranged in the cross section of the filter 31. The cross section of the filter section in region 301 is shown in Fig. 3(A) above, and the cross section of the filter section in region 302 is shown in Fig. 3(B) above. As shown in Fig. 3(A), the packing density of the sheet member in the region where hollow members 33 are not arranged is 90 mg / cm ３ More than 360g / cm ３ Preferably, it is 150 mg / cm or less. ３ More than 240g / cm ３ As shown in FIG. 3B, the packing density of the sheet member in the region where the hollow member 33 is disposed is 105 mg / cm. ３ More than 720g / cm ３ Preferably, it is 170 mg / cm or less. ３ 480g / cm or more ３ More preferably, it is:

[0019] The material of the sheet member constituting the filter 31 is not particularly limited as long as it can achieve the general functions of a filter. However, paper or nonwoven fabric, such as pulp paper primarily composed of pulp, is preferred, and paper is more preferred. Other materials for the sheet member constituting the filter 31, such as a polymer sheet or a metal sheet, may also be used. Note that general functions of a filter 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 to have all of these functions. Furthermore, in a non-combustion heating type 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, one important function is to suppress the filtering function while preventing the components contained in the flavor inhalation article 1 from falling off.

[0020] The filter 31 is formed of a sheet material 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 material is filled to form voids along the longitudinal direction of the filter section 30, and the sheet material is gathered. Here, "gathered" means that the sheet material is filled in a state where it is folded back multiple times horizontally along the centerline direction of the filter 31. The sheet material 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 material, as shown in FIG. 4(A). By crimping the entire sheet material, voids can be efficiently formed in the sheet material. Crimping is a process of creating wrinkles in a sheet. For example, by passing the sheet to be treated between a pair of rollers having a plurality of protrusions on the surface, wrinkles extending perpendicular to the sheet conveyance direction are formed on both the front and back surfaces of the sheet, thereby performing a crimping treatment.

[0021] The hollow member 33 is disposed within the paper filter (filter 31) along the longitudinal direction of the filter unit 30 and has a lower filtration rate than that of a paper filter. Because the hollow member 33 has a lower filtration rate, it is possible to reduce the degree of filtration of flavor and aroma, and at the same time, by using the hollow member 33, the hardness of the filter unit 30 can be adjusted. In this embodiment, the downstream (second side) end of the hollow member 33 is located within a predetermined distance from the downstream (second side) end of the filter unit 30. This positional relationship allows for both improved aerosol delivery efficiency and easier manufacturing of the filter unit 30, compared to when the downstream end of the filter unit 30 is located more than a predetermined distance away from the end of the hollow member 33.

[0022] When the downstream end of the hollow member 33 forms a flat surface, the predetermined distance is preferably 1 / 2 × A × √3. Here, A is the diameter of the outer periphery of the hollow member 33 on the downstream side. If the downstream end is not circular, a circle with the same area as the shape of the end is assumed, and the diameter of the outer periphery of this circle is used. Furthermore, when the downstream end surface of the hollow member 33 does not form a flat surface, the diameter of the outer periphery of the cross section at the downstream end of the hollow member 33 is calculated. 1 / 2 × A × √3 corresponds to the height of an equilateral triangle with one side equal to the diameter of the outer periphery. The reason why 1 / 2 × A × √3 is preferable will be explained. In this embodiment, the filter unit 30 is manufactured by connecting four filter units 30. To manufacture the filter unit 30, first, a sheet member having a size corresponding to four filters 31 is laid on top of a single flat sheet of paper for the wrapper paper 35 having a length corresponding to four filter units, while the sheet member is crimped. A hollow member 33 is placed on the crimped sheet member, and the roll paper 35 and the sheet member are wound up to produce four continuous filter parts 30 in length, which are then cut into quarters in the length direction to obtain four filter parts 30.

[0023] In order to reduce the degree of filtration of the flavor and aroma in the aerosol, it is preferable that the hollow member 33 has the same length as the filter unit 30. However, in the above manufacturing method, it is necessary to prepare a hollow member 33 having the length of four filter units 30, feed it onto a sheet member, and wind it up, making manufacturing extremely difficult. Therefore, the hollow member 33 is made shorter than the filter unit, and the downstream end of the hollow member 33 is positioned at a distance from the end of the filter unit. A schematic diagram of a vertical cross section of the filter unit 30 is shown in Figure 6 (A). Within the filter unit 30, the filter 31 has a high packing density where the hollow member 33 is located and a low packing density where it is not located, but the area downstream of the hollow member 33 where the filter 31 is not located forms a funnel-like shape. In the longitudinal cross-section of the filter unit, the distance from the hollow member 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 periphery at the downstream end of the hollow member 33. Therefore, as described above, the predetermined distance is preferably ½ × A × √3. When the downstream end of the filter unit 30 is positioned closer than ½ × A × √3 to the hollow member 33, and the filter unit 30 is cut at the cross section XIIB in FIG. 6(A), a hole not covered by the paper filter (filter 31) is formed in the downstream end surface of the filter unit 30, connecting the hollow member 33 to the outside, as shown in FIG. 6(B). When the opening of the hollow member 33 is positioned at the upstream end of the filter unit 30 and the downstream side of the filter unit 30 is cut at the cross section XIIB as shown in FIG. 6(A), the length of the hollow member 33 is essentially the same as that of the filter unit 30, thereby reducing the degree of filtration of the aerosol flavor and taste. At least one end of the hollow member 33 is disposed within a predetermined distance from the longitudinal end of the filter unit 30. "Within the predetermined distance" includes the case where an opening is provided at the longitudinal end, in which case the other end is positioned inside the end of the filter unit 30.

[0024] The hollow member 33 is preferably elongated because it is disposed within the paper filter. In the cross section of the hollow member 33, the outer peripheral shape can be appropriately changed to match the shape of the product, but is preferably circular, elliptical, polygonal, or rounded polygonal, with a cylindrical shape being preferred from an appearance perspective. Furthermore, the ratio of the area of ​​the hollow member 33 to the area of ​​the filter portion 30 in the cross section is not particularly limited, but can be 15% to 50%, preferably 20% to 40%. When multiple hollow members 33 are arranged parallel to each other within the filter 31, the ratio of the total area of ​​the multiple hollow members 33 to the area of ​​the filter portion 30 in one cross section is preferably within the above range. When the outer peripheral shape of the hollow member 33 in the cross section is substantially circular, its outer diameter can be appropriately changed to match the size of the product, but is typically 6 mm to 15 mm, more preferably 9 mm to 11 mm. Furthermore, the ratio of the outer diameter of the hollow member 33 to the outer diameter of the filter 31 is usually 0.20 or more and less than 0.70, and more preferably 0.35 or more and 0.50 or less. If the cross section is not circular, the outer diameter is assumed to be that of a circle having the same area as the cross section, and the outer diameter of that circle is applied.

[0025] Here, a specific example of the configuration of the hollow member 33 will be described. For example, the hollow member 33 is a tube formed by winding a sheet member containing the same material as the sheet member constituting the filter 31, so that the cross section of the hollow member 33 is hollow, such as a cylinder. Specifically, the hollow member 33 is a cardboard tube formed by winding paper. By using a cardboard tube for the hollow member 33, the material constituting the hollow member 33 can be substantially the same as that of the filter 31.

[0026] The hollow member 33 is a paper tube formed by bonding multiple sheet members, including at least paper, together and spirally winding them, a so-called spiral paper tube. The spiral paper tube manufacturing method makes it possible to easily form a paper tube with a circular cross section. By using a spiral paper tube for the hollow member 33, the strength of the hollow member 33 can be improved while reducing the ratio of the area of ​​the hollow member 33 to the area of ​​the filter section 30. Furthermore, by combining and bonding sheet members containing fragrance components, flavor components, tobacco powder, etc. with paper, a new flavor and smoking taste can be imparted to the aerosol. Alternatively, the hollow member 33 may be a paper tube formed by winding paper multiple times into a cylindrical shape, a so-called straight paper tube. The straight paper tube manufacturing method allows for a smaller amount of glue to be used to bond the paper compared to the spiral paper tube manufacturing method.

[0027] Alternatively, the hollow member 33 may be a paper tube formed by stacking multiple sheet members, including at least paper. By stacking multiple sheet members, the strength of the hollow member 33 can be maintained even when the basis weight of each sheet member is small. The hollow member 33 is not limited to a paper tube formed by wrapping paper around it, but may also be formed from a tube made of synthetic resin or the like that already has a hollow cross section. The thickness of the hollow member 33 is not particularly limited. For example, when multiple sheets are stacked, the total thickness may be 50 μm to 500 μm, or 100 μm to 250 μm. By setting the thickness in this range, deformation due to pressure from the paper filter packed around it can be suppressed.

[0028] 7A and 7B are diagrams showing another example of the longitudinal cross section of the flavor inhalation article 1 according to the first embodiment, 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. Fig. 7(A) is a diagram showing the longitudinal cross section of the flavor inhalation article 1 in which a plurality of hollow members 33 are arranged in a straight line, and Fig. 7(B) is a diagram showing the longitudinal cross section of the flavor inhalation article 1 in which the hollow members 33 are arranged on both the upstream and downstream sides within a predetermined distance from the end of the filter unit 30. When a plurality of hollow members 33 are arranged in a straight line, it is preferable that the distance between the hollow members 33 is a predetermined distance, particularly 1 / 2 × A × √3 or less, so that the hollow members are substantially connected.

[0029] Fig. 8 shows another embodiment of the filter unit 30. Fig. 8 shows an example of a flavor inhalation article 2 in which the base unit 10 has a tip member 13 that prevents the aerosol source 11 from falling off from the first end face of the base unit 10, and further has a separate filter 32 as the filter unit 230, and the hollow member 33 is present in the area filled with the filter 31. Fig. 8(A) shows a state in which the hollow member 33 has an opening at the boundary between the filter 31 and the separate filter 32, and the downstream side is located within a predetermined distance from the downstream end of the filter unit 30. Fig. 8(B) shows a state in which the hollow member 33 is located within a predetermined distance from both the upstream side (first side) and downstream side (second side) of the filter 31. Fig. 8(C) shows a state in which the hollow member 33 has openings at the upstream end and downstream end of the area filled with the filter 31 on both the upstream and downstream sides, and the two hollow members 33 are located within a predetermined distance. The flavor inhalation article 2 of FIG. 8 differs from the flavor inhalation article 1 of FIG. 7 in that it has a filter unit 230 corresponding to the filter unit 30. Differences from the embodiment of FIG. 7 will be described below. The same components in FIGS. 7 and 8 are designated by the same reference numerals, 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 hollow member 33, and a wrapper 35 that is located between the filter 31 and tipping paper 40 and wrapped around the outer peripheral surface of the filter 31. The filter unit 230 is connected (coupled) to the cooling unit 20 by integrally winding the cooling unit 20 and the filter unit 230 using the tipping paper 40. The wrapper 35 may not be provided. The cross section of the separate filter 32 of the filter unit 230 is substantially circular, and its outer diameter can be changed appropriately depending on the size of the product, but can be, for example, 22 mm to 27 mm. If the cross section is not circular, the outer diameter is assumed to be that of a circle having the same area as the cross section, and the outer diameter 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 those 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.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 cylindrical hollow member made of cellulose acetate fiber, nonwoven fabric, pulp paper, or the like. Alternatively, a paper filter filled with sheet-like pulp paper may be used. In addition to these packing 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 can be used. The packing density of the filter material is not particularly limited, but is usually 90 mg / cm. ３ 360mg / cm or more ３ or less, preferably 150 mg / cm ３ 240mg / cm or more ３ The following is the result.

[0030] The filter 31 may include a crushable additive release container (e.g., a capsule) including a crushable outer shell made of gelatin or the like. The form of the additive release container, such as a capsule, is not particularly limited, and any known form may be employed. 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 or activated carbon. 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. The flavoring agent may be, for example, menthol, spearmint, peppermint, fenugreek, clove, medium chain triglycerides (MCT), or the like, and one or a combination of these may be used.

[0031] The filter may also contain other components, such as inorganic fine powders (e.g., kaolin, talc, diatomaceous earth, quartz, calcium carbonate, barium sulfate, titanium oxide, alumina), thermal stabilizers (e.g., alkali or alkaline earth metal salts), colorants, whiteness improvers, oils, retention aids, sizing agents, biodegradation or photodegradation promoters (e.g., anatase titanium oxide), and natural polymers or their derivatives (e.g., cellulose powder). In addition to these filler materials, inorganic adsorbents such as activated carbon, sepiolite, palygorskite, zeolite, activated carbon fiber, activated alumina, sepiolite-mixed paper, silica gel, activated clay, permiculite, and diatomaceous earth, as well as porous polymers such as pulp, various fibers, and ion-exchange resins, may also be used. These other components may be used alone or in combination.

[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 of the substrate 10 in the centerline direction can be adjusted appropriately depending on the size of the product, but is typically 10 mm or more, preferably 12 mm or more, more preferably 15 mm or more, and even more preferably 18 mm or more. The size of the substrate 10 in the centerline direction is typically 70 mm or less, preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 25 mm or less. The ratio of the size 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 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 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 outer diameter can be adjusted as needed to suit the size of the product, but is preferably approximately the same as the outer diameter of the filter 31 described below. If the cross section is not circular, the outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter 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% by volume or more and 90% by volume or less when inhaled at 17.5 ml / sec using an automatic smoking machine. This "air inflow rate" refers to the volumetric rate of air inflowing through the through holes 60 when the volumetric rate of air inhaled from the mouth end is taken as 100% by volume. The air inflow rate is preferably 50% by volume or more and 80% by volume or less, and more preferably 55% by volume or more and 75% by volume or less. These air inflow rates can be achieved, for example, by selecting the number of through holes 60 per through hole group from the range of 5 to 50, selecting the diameter of the through holes 60 from the range of 0.1 mm to 0.5 mm, 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 of a general type, such as a type 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 paper for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto. These pulps may be used alone or in any combination of two or more types in any ratio. Pulp types that can be used include chemical pulp produced by kraft cooking, acidic, neutral, or alkaline sulfite cooking, soda cooking, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc. The tipping paper 40 may be produced by the above-mentioned production method or may be a commercially available product.

[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.

[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] As described above, in any of the embodiments, the filter unit 30 for a flavor inhalation article comprises a paper filter (filter 31) filled with a sheet member so as to form voids along the longitudinal direction, and a hollow member 33 disposed within the paper filter along the longitudinal direction of the filter unit 30 and having a filtration rate lower than that of the paper filter, with at least one end of the hollow member 33 disposed at a position within a predetermined distance from the longitudinal end of the filter unit 30. With these configurations, it is possible to provide a filter unit for a flavor inhalation article and a flavor inhalation article that achieve both delivery efficiency and ease of manufacture.

[0068] <Combustion heating type flavor inhalation article> Figures 9 and 10 are views showing a longitudinal section of a flavor inhalation article 4 according to the second embodiment. The flavor inhalation article 4 according to the second embodiment differs from the flavor inhalation article 1 according to the first embodiment in terms of the manner of use. Furthermore, the flavor inhalation article 4 according to the second 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 second embodiments are designated by the same reference numerals, and detailed description thereof will be omitted.

[0069] The flavor inhalation article 4 is a combustion-type flavor inhalation article. It is used by burning a first end surface, which is opposite to a second end surface, which is the end surface held by the user for inhalation. The aerosol source 11 included in the substrate 10 generates vapor from which the aerosol is generated by heating during combustion. The cross section of the flavor inhalation article 4 is substantially circular, and its outer diameter can be varied as appropriate depending on the size of the product, but is typically 16 mm to 27 mm, and preferably 22 mm to 25 mm. If the cross section is not circular, the above-mentioned outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter of that circle is used. The size of the flavor inhalation article 4 in the center line direction can be varied as appropriate depending on the size of the product, but is typically 60 mm to 120 mm, and preferably 80 mm to 100 mm.

[0070] 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.

[0071] 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.

[0072] From the viewpoint of improving the efficiency of air inflow, the region where the communication hole 460 is present is preferably a region of the filter 31 where the packing density of the sheet member constituting the filter 31 is relatively low, in other words, a region of the filter 31 where no hollow member 33 is disposed. In the example shown in Fig. 10(A) , the hollow member 33, which is smaller than the size of the filter 31 in the center line direction, is located on the second side (downstream side) within the filter 31, and the communication hole 460 is provided in the region of the filter 31 where no hollow member 33 is disposed. Specifically, the communication hole 460 is provided in a region upstream of the hollow member 33.

[0073] The communication hole 460 is not limited to the above-described configuration as long as it is provided in an area of ​​the filter 31 where the hollow member 33 is not disposed.

[0074] In Fig. 9, both the upstream end and downstream end of the hollow member 33 are disposed within a predetermined distance from the longitudinal end of the filter unit 30. Fig. 10(A) shows a state in which the hollow member 33 has an opening on the downstream side (second side) of the filter unit 30, and the upstream side (first side) is located within a predetermined distance, and Fig. 10(B) is a diagram showing a longitudinal cross section of a flavor inhalation article 4 in which a plurality of hollow members 33 are arranged in a straight line. In Fig. 10(B), the distance between the hollow members 33 is a predetermined distance, particularly two hollow members 33 positioned within the filter 31, with the distance between the hollow members 33 being equal to or less than 1 / 2 × A × √3.

[0075] 11 is a diagram showing a longitudinal section of a flavor inhalation article 5 according to the second embodiment. The flavor inhalation article 5 according to the second embodiment differs from the flavor inhalation article 4 according to the second embodiment in that it has a filter section 530 corresponding to the filter section 30. The differences from the flavor inhalation article 4 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 descriptions thereof will be omitted.

[0076] 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 hollow member 33, which has a filtration rate lower than that of the filter 31; and a wrapper 35, which is located between the filter 31 and the tipping paper 40 and is wound around the outer circumferential surface 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 wrapper 35, and then wound together around yet another wrapper 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 first 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.

[0077] 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. In Fig. 11(A) , the separate filter 32 is located on the upstream side and the filter 31 is located on the downstream side, but the opposite arrangement may be used as shown in Fig. 11(B) . As shown in Fig. 11(A) , a hollow member 33 smaller than the size of the filter 31 in the centerline direction is arranged on the filter 31 with an opening on the second side (downstream side), and the first side (upstream side) of the hollow member 33 may be arranged within a predetermined distance from the boundary between the filter 31 and the separate filter 32, and the communication hole 460 may be provided in a region upstream of the hollow member 33. Also, as shown in Figure 11 (B), the hollow member may be arranged with an opening on the first side (upstream side) of the filter section 530, and the second side (downstream side) may be arranged within a predetermined distance from the boundary between the filter 31 and the separate filter 32, and the communication hole 460 may be provided in the downstream region of the hollow member 33.

[0078] The configuration of the filter unit 530 is not limited to the examples shown in Figures 11(A) and 11(B), and the positional relationship between the filter 31 and the separate filter 32 may be changed. Furthermore, the separate filter 32 may contain a crushable additive release container (e.g., a capsule) including a crushable outer shell made of gelatin or the like. As described above, in all embodiments, the filter unit 30 for a flavor inhalation article includes a paper filter (filter 31) filled with a sheet member to form a gap along the longitudinal direction, and a hollow member 33 disposed within the paper filter and having a filtration rate lower than that of the paper filter, with the downstream end of the filter unit 30 located at a predetermined distance or more from the end of the hollow member. These configurations make it possible to provide a filter unit for a flavor inhalation article and a flavor inhalation article that do not form holes in the filter end.

[0079] <Summary> The present disclosure includes the following configurations: (1) A filter unit for a flavor inhalation article, comprising: a paper filter filled with a sheet member to form voids along the longitudinal direction; and a hollow member disposed within the paper filter along the longitudinal direction of the filter unit and having a filtration rate lower than that of the paper filter, wherein at least one end of the hollow member is disposed within a predetermined distance from the longitudinal end of the filter unit. (2) A filter unit for a flavor inhalation article according to (1), wherein one end of the hollow member is disposed within a predetermined distance from the downstream end of the filter unit, and the other end has an opening disposed on the upstream end of the filter unit. (3) A filter unit for a flavor inhalation article according to (2), wherein the predetermined distance is ½ × A × √3 (A is the diameter of the outer circumferential circle of the opening). (4) A filter unit for a flavor inhalation article according to (1) or (2), wherein the hollow member includes at least paper. (5) The filter portion for a flavor inhalation article according to (4), wherein the hollow member is a straight paper tube formed by rolling paper into a cylindrical shape or a spiral paper tube formed by rolling a strip of paper obliquely. (6) The filter portion for a flavor inhalation article according to (1), wherein the paper filter is a filter in which the sheet member is gathered. (7) The filter portion for a flavor inhalation article according to (6), wherein the paper filter is a filter in which a sheet member made of paper or nonwoven fabric is crimped. (8) The filter portion for a flavor inhalation article according to any one of (1) to (7), wherein the sheet member is crimped along the longitudinal direction of the filter portion. (9) The packing density of the sheet member is 105 mg / cm at the location where the hollow member is present. ３ 720mg / cm or more ３ (10) The filter part for a flavor inhalation article according to any one of (1) to (9), wherein the ratio of the outer diameter of the hollow member to the outer diameter of the paper filter is 0.2 or more and less than 0.7. (11) The airflow resistance of the paper filter is 0 [mmH ２ O / 10mm] or more 20[mmH ２(13) The flavor inhalation article according to (12), wherein the filter section for the flavor inhalation article according to any one of (1) to (10) has a viscosity of less than [0.0 / 10 mm]. (14) A flavor inhalation article comprising the filter section according to any one of (1) to (11) and a substrate section including an aerosol source. (15) The flavor inhalation article according to (12), wherein the flavor inhalation article is a non-combustion heating type flavor inhalation article. (16) The flavor inhalation article according to (12), wherein the flavor inhalation article is a combustion type flavor inhalation article.

[0080] 1, 2... Non-combustion heating type flavor inhalation article, 4, 5... Combustion heating type flavor inhalation article, 10... Base material portion, 11... Aerosol source, 20... Cooling portion, 30, 230, 530... Filter portion, 31... Filter, 32... Additional filter, 33... Hollow member, 35... Wrapping paper, 40... Tipping paper, 50... Mouthpiece segment, 60... Through hole, 460... Communication hole

Claims

1. A filter portion for a flavor inhalation article, a paper filter in which a sheet member is filled so as to form a gap in the longitudinal direction; a hollow member disposed in the paper filter along the longitudinal direction of the filter portion and having a filtration rate lower than that of the paper filter; Equipped with At least one end of the hollow member is disposed at a position within a predetermined distance from the longitudinal end of the filter unit. A filter part for a flavor inhalation article.

2. The hollow member has one end within a predetermined distance from the downstream end of the filter unit, and the other end has an opening disposed on the upstream end of the filter unit. A filter portion for the flavor inhalation article according to claim 1.

3. The predetermined distance is ½×A×√3 (A is the diameter of the outer circumferential circle of the opening), A filter portion for the flavor inhalation article according to claim 2.

4. The hollow member includes at least paper. A filter portion for the flavor inhalation article according to claim 1 or 2.

5. The hollow member is a straight paper tube formed by winding paper into a cylindrical shape or a spiral paper tube formed by winding a strip of paper obliquely. A filter portion for the flavor inhalation article according to claim 4.

6. The paper filter is a filter in which the sheet member is gathered. A filter portion for the flavor inhalation article according to claim 1.

7. The paper filter is a filter obtained by crimping a sheet member made of paper or nonwoven fabric. A filter portion for a flavor inhalation article according to claim 6.

8. The sheet member is crimped in the longitudinal direction of the filter portion. A filter portion for the flavor inhalation article according to claim 1.

9. The packing density of the sheet member is 105 mg / cm at the location where the hollow member is present. ３ 720mg / cm or more ３ Below is the A filter portion for the flavor inhalation article according to claim 1.

10. The ratio of the circumference of the hollow member to the circumference of the paper filter is 0.2 or more and less than 0.

7. A filter portion for the flavor inhalation article according to claim 1.

11. The air resistance of the paper filter is 0 [mmH ２ O / 10mm] or more 20[mmH ２ 0 / 10 mm] or less, A filter portion for the flavor inhalation article according to claim 1.

12. A filter part according to claim 1, a substrate portion including an aerosol source; A flavor inhalation article comprising:

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

14. The flavor inhalation article according to claim 12, wherein the flavor inhalation article is a combustion-type flavor inhalation article.