Paper plug and flavor inhalation article

Abstract

Provided is a paper plug having a filler and an inner plug wrap in which the filler is wound, wherein the hardness of the paper plug in a direction perpendicular to a long axis represented by formula (1) is 70.0% or greater.　Formula (1): Hardness in direction perpendicular to long axis (%) = (Dd / Ds) × 100 (In formula (1), Ds (mm) is the diameter of a cross-section in a direction perpendicular to the long-axis direction of the paper plug before a load F is applied, Dd (mm) is the diameter of a cross-section in a direction perpendicular to the long-axis direction of the paper plug when the load F is applied, and the load F is a load applied to the paper plug under conditions such that the compression load applied in the direction perpendicular to the long axis of the paper plug is 3N, the head diameter of a pressurizing jig is φ12 mm, and the compression time is 10 seconds.

Description

Paper plugs and flavor inhalers

[0001] The present disclosure relates to a paper plug and a flavor inhalation article.

[0002] As a filter for a flavor inhalation article, a paper filter in which a filter material such as paper (pure pulp) is wrapped with plug wrap is used instead of an acetate filter in which synthetic fibers such as cellulose acetate tow are processed into a rod shape. For example, Patent Document 1 discloses a paper filter for a flavor inhalation article.

[0003] In the manufacturing process of a flavor inhalation article, each segment constituting the flavor inhalation article, such as a paper filter, is required to have sufficient hardness so that processing can be carried out smoothly using existing manufacturing equipment. Furthermore, in order to impart a sense of luxury to the flavor inhalation article as a finished product, it is preferable that each segment constituting the flavor inhalation article have sufficient hardness.

[0004] International Publication No. 2022 / 230408

[0005] The present disclosure provides a paper plug and a flavor inhalation article including the paper plug, both of which have sufficient hardness.

[0006] A first aspect of the present disclosure is a paper plug having a filler and an inner plug wrap around which the filler is wrapped, wherein the hardness in a direction perpendicular to the long axis, as expressed by the following formula (1), is 70.0% or more: Hardness in a direction perpendicular to the long axis (%) = (Dd / Ds) × 100 (1) (In formula (1), Ds (mm) is the diameter of a cross section of the paper plug in a direction perpendicular to the long axis direction before a load F is applied, Dd (mm) is the diameter of a cross section of the paper plug in a direction perpendicular to the long axis direction when a load F is applied, and the load F is a compressive load of 3 N applied to the paper plug in a direction perpendicular to its long axis, with a pressure jig head diameter of φ12 mm and a compression time of 10 seconds.)

[0007] In the first aspect, the hardness of the paper plug in the direction perpendicular to the long axis as defined by the above formula (1) is 70.0% or more. Therefore, according to the first aspect, a paper plug with sufficient hardness can be provided, which allows for smooth processing in the manufacturing process of the flavor inhalation article and contributes to imparting a luxurious feel to the flavor inhalation article.

[0008] A second aspect of the present disclosure is a method for manufacturing a filler sheet according to the first aspect, wherein the width (mm) of the raw sheet of the filler and the basis weight (g / m ２ The ratio of width (mm) / basis weight (g / m) is in the range expressed by the following formula (2): 2.2< width (mm) / basis weight (g / m) ２ ) <8.8 (2)

[0009] In the second aspect, the ratio of the width to the basis weight of the filler roll satisfies the above formula (2). A paper plug wound with a filler produced from a roll having such a width and basis weight has an airflow resistance appropriate for use in a flavor inhalation article. Furthermore, by selecting an appropriate value within this range, a paper plug with the desired airflow resistance can be obtained while ensuring a hardness of 70.0% or more. Specifically, by selecting a roll of filler so that the ratio of the width to the basis weight of the roll is large, the airflow resistance of the paper plug can be increased, and by selecting a roll of filler so that this ratio is small, the airflow resistance of the paper plug can be decreased. Thus, according to the second aspect, by adjusting the ratio of the width to the basis weight of the filler roll, a paper plug with appropriate hardness and airflow resistance can be provided.

[0010] A third aspect of the present disclosure is the paper plug according to the first and second aspects, wherein the packing density of the filler in the paper plug is 0.138 mg / mm ３ That's it, Paper Plug.

[0011] In the third aspect, the packing density of the filler in the paper plug is 0.138 mg / mm ３ The paper plug having such a structure has an appropriate hardness. Therefore, according to the third aspect, a paper plug having an appropriate hardness can be provided.

[0012] A fourth aspect of the present disclosure is a paper plug according to any one of the first to third aspects, wherein the filler material contains cellulose and is formed from a crimped sheet.

[0013] In the fourth aspect, the filler is formed from a crimped sheet containing cellulose. Manufacturing a filler from a crimped sheet containing cellulose generally increases the hardness of the paper plug and increases its airflow resistance. Furthermore, crimping reduces the visibility of voids (small holes) formed in the cross section perpendicular to the longitudinal direction of the paper plug, and reduces the variation in airflow resistance between manufactured paper plugs. Therefore, in the fourth aspect, by crimping the sheet that serves as the base sheet for the filler, it is possible to easily improve the hardness and airflow resistance of the paper plug, reduce the visibility of voids, and stabilize the airflow resistance.

[0014] A fifth aspect of the present disclosure is a paper plug according to the fourth aspect, wherein the crimp depth of the sheet is 0.3 mm or more.

[0015] In the fifth aspect, the cellulose-containing sheet that serves as the base sheet for the filler is crimped to a crimp depth of 0.3 mm or more. When a sheet with a crimp depth of 0.3 mm or more is used, the cavities formed in the cross section perpendicular to the longitudinal direction of the paper plug are within an acceptable range. Therefore, according to the fifth aspect, a paper plug that is desirable from the viewpoint of appearance can be provided.

[0016] A sixth aspect of the present disclosure is the above-mentioned first to fifth aspects, wherein the width of the raw sheet of the filler is 110 mm or more and 220 mm or less, and the basis weight of the raw sheet of the filler is 25 g / m ２ 50g / m or more ２ Below is the paper plug.

[0017] In the sixth aspect, the width of the raw sheet of the filler is 110 mm or more and 220 mm or less, and the basis weight is 25 g / m ２ 50g / m or more ２The paper plug formed by winding a filler material manufactured from such a raw web has appropriate hardness and airflow resistance. Therefore, according to the sixth aspect, a paper plug having appropriate hardness and airflow resistance can be provided.

[0018] A seventh aspect of the present disclosure is the first to sixth aspects, wherein the airflow resistance per 1 mm in the airflow direction is 0.7 mmH ２ O / mm or more 3.5mmH ２ 0 / mm or less, and is a paper plug used in flavor inhalation articles.

[0019] In the seventh aspect, the airflow resistance of the paper plug in the airflow direction is 0.7 mmH ２ O / mm or more 3.5mmH ２ Therefore, according to the seventh aspect, a paper plug having hardness and airflow resistance suitable for use in a flavor inhalation article can be provided.

[0020] An eighth aspect of the present disclosure is the seventh aspect, wherein the raw roll of the filler is a paper plug containing an additive for adjusting flavor.

[0021] In the eighth aspect, the raw sheet of filler material for the paper plug used in the flavor inhalation article contains an additive for adjusting the flavor, and therefore, according to the eighth aspect, it is possible to provide a paper plug constituting the flavor inhalation article that generates a suitable flavor when heated.

[0022] A ninth aspect of the present disclosure is a paper plug according to the eighth aspect, wherein the additive includes at least one of a phenol-reducing material and a fragrance.

[0023] In the ninth aspect, the raw sheet of filler for the paper plug used in the flavor inhalation article contains at least one of a phenol-reducing material and a flavoring agent, thereby providing a paper plug constituting the flavor inhalation article that produces a more suitable flavor.

[0024] A tenth aspect of the present disclosure is a flavor inhalation article comprising a paper plug according to any one of claims 1 to 9 as a first plug, a second plug containing a flavor source, and tipping paper wrapping the first plug and the second plug.

[0025] In the tenth aspect, the flavor inhalation article is configured to include a paper plug as a first plug having a hardness of 70.0% or more in a direction perpendicular to the long axis as defined by the above formula (1), a second plug containing a flavor source, and tipping paper wrapping the first plug and the second plug. For example, the first plug can function as a paper filter in the flavor inhalation article. Therefore, according to the tenth aspect, flavor inhalation articles can be manufactured that include various forms of paper plugs with sufficient hardness.

[0026] An eleventh aspect of the present disclosure is the flavor inhalation article of the tenth aspect, wherein the paper plug is disposed upstream of the second plug.

[0027] In the eleventh aspect, a paper plug is disposed as a first plug upstream of a second plug containing a flavor source inside the flavor inhalation article, through which air flows from upstream to downstream when a user inhales. In particular, the first plug may constitute the upstream end of the flavor inhalation article (opposite the downstream end inhaled by the user). Thus, according to the eleventh aspect, the paper plug can prevent vapor or aerosol generated in the flavor source from leaking upstream of the flavor inhalation article.

[0028] FIG. 1 is an overall perspective view of a filter rod according to the present embodiment. FIG. 2 is a cross-sectional view of the filter rod taken along the arrows A-A in FIG. 1. FIG. 3 is a graph showing the relationship between the weight and stiffness of the filter rod in the longitudinal direction when the paper sheet is crimped to a depth of 0.3 mm. FIG. 4 is a graph showing the relationship between the weight and stiffness of the filter rod in the longitudinal direction when the paper sheet is crimped to a depth of 0.5 mm. FIG. 5 is a schematic diagram showing a crimped paper sheet. FIG. 6 is a graph showing the stiffness and airflow resistance in the longitudinal direction when the first to third examples are crimped to a depth of 0.3 mm. FIG. 7 is a graph showing the stiffness and airflow resistance in the longitudinal direction when the examples are crimped to a depth of 0.5 mm. FIG. 8 is a graph showing the stiffness and airflow resistance in the longitudinal direction when the examples are crimped to a depth of 0.7 mm. 10 is a graph showing the relationship between crimp depth and hardness in the longitudinal direction for each Example. FIG. 11 is a diagram showing the relationship between crimp depth and appearance for each Example. FIG. 12 is a graph showing the fill weight and airflow resistance of filter rods when a plurality of paper sheets, including each Example, having different basis weights and widths of the raw web, are crimped to a depth of 0.3 mm. FIG. 13 is a graph showing the fill weight and airflow resistance of filter rods when a plurality of paper sheets, including each Example, having different basis weights and widths of the raw web, are crimped to a depth of 0.5 mm. FIG. 14 is a graph showing the fill weight and airflow resistance of filter rods when a plurality of paper sheets, including each Example, having different basis weights and widths of the raw web, are crimped to a depth of 0.7 mm. FIG. 15 is a diagram showing the relationship between crimp depth and appearance for filter rods including paper sheets made from a specified raw web. FIG. 16 is a graph showing the relationship between crimp depth and the area and number of voids (small holes) for the filter rod of FIG. 9. FIG. 17 is a schematic side cross-sectional view showing an example of a flavor inhalation article using a paper filter. 1 is a schematic side cross-sectional view showing another example of a flavor inhalation article using a paper plug obtained by cutting a filter rod in the longitudinal direction. FIG 2 is a schematic view showing a method for measuring the hardness of a filter rod.

[0029] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings described below, identical or corresponding components are designated by the same reference numerals, and redundant description will be omitted.

[0030] Fig. 1 is an overall perspective view of a filter rod 10 according to this embodiment. Fig. 2 is a cross-sectional view of the filter rod 10 taken along the line AA in Fig. 1.

[0031] The filter rod 10 is a material for a paper filter that constitutes a part of the flavor inhalation article. The filter rod 10 can be cut to a predetermined length in the longitudinal direction to obtain a paper filter (a paper plug 20 described later).

[0032] As shown in FIG. 1 , the filter rod 10 is cylindrical and includes a paper sheet 12 and a first plug wrap 14 around which the paper sheet 12 is wrapped. The paper sheet 12 is formed by cutting a cellulose-containing raw web to a predetermined length and crimping it as appropriate. The paper sheet 12 is folded and placed inside the cylindrically wound first plug wrap 14. Instead of being folded, the paper sheet 12 may be wound and placed inside the first plug wrap 14. While the paper sheet 12 will be described below as a single sheet, it may also be a set of multiple sheets. In other words, a set of two sheets obtained by cutting the paper sheet 12 obtained by cutting the raw web to a predetermined length, for example, in half, can also be considered to be the paper sheet 12. The paper sheet 12 is an example of a filler material of the present disclosure. The first plug wrap 14 is an example of an inner plug wrap of the present disclosure.

[0033] The first plug wrap 14 may be made primarily of pulp. Pulp may be made from wood pulp, such as softwood pulp or hardwood pulp, or may be made by blending non-wood pulp, such as flax pulp, hemp pulp, sisal pulp, or esparto, which are commonly used in tobacco wrapping paper. These pulps may be used alone or in any combination of two or more types. They may also contain fillers, such as calcium carbonate.

[0034] The first plug wrap 14 may be formed in any suitable form, including one or more rows of adhesive-containing seams. The adhesive may include a hot-melt adhesive, which may further include polyvinyl alcohol. The adhesive may also include a vinyl acetate adhesive. The material of the first plug wrap 14 is not particularly limited, and known materials may be used, and may also include a filler such as calcium carbonate. The first plug wrap 14 may be coated or uncoated, but is preferably coated with a desired material to provide strength, structural rigidity, and other functions. The first plug wrap 14 may also be porous paper having a plurality of pores and providing breathability.

[0035] As an example, in the following description, the length to which the raw web is cut (i.e., the length of the filter rod 10 in the longitudinal direction) is 120 mm, and the circumference of the filter rod 10 is 21.3 mm. Therefore, assuming that pi is 3.14, the radius of the filter rod 10 is 21.3 mm / (3.14 x 2) = 3.391719 (omitted) ≈ 3.40 mm. Furthermore, the cross-sectional area of ​​the filter rod 10 in a cross section perpendicular to the longitudinal direction (the surface shown in Figure 2) is 21.3 mm x 3.4 mm / 2 = 36.21 mm ２ Furthermore, the volume of the filter rod 10 is 120 mm x 36.21 mm ２ =4,345.2 mm ３ is.

[0036] In order to smoothly carry out processing in an existing manufacturing system in the manufacturing process of flavor inhalation articles, the paper filter (and the filter rod 10 as its material) is required to have a certain degree of hardness. Specifically, the hardness of the filter rod 10 in the direction perpendicular to the longitudinal direction is desirably 70% or more. Furthermore, the hardness of the filter rod 10 in the direction perpendicular to the longitudinal direction is more preferably 75% or more, and even more preferably 80% or more.

[0037] Figure 3A is a graph showing the relationship between weight and stiffness in the longitudinal direction of the filter rod 10 when the paper sheet 12 is crimped to a depth of 0.3 mm, Figure 3B is a graph showing the relationship between weight and stiffness in the longitudinal direction of the filter rod 10 when the paper sheet 12 is crimped to a depth of 0.5 mm, and Figure 3C is a graph showing the relationship between weight and stiffness in the longitudinal direction of the filter rod 10 when the paper sheet 12 is crimped to a depth of 0.7 mm.

[0038] The stiffness (%) in the direction perpendicular to the longitudinal direction of the filter rod 10 is calculated by the following formula: Stiffness (%) in the direction perpendicular to the long axis = (Dd / Ds) × 100 Here, Ds (mm) is the diameter of the cross section of the filter rod 10 in the direction perpendicular to the long axis direction before the load F is applied, Dd (mm) is the diameter of the cross section of the filter rod 10 in the direction perpendicular to the long axis direction when the load F is applied, and the load F is the load applied to the filter rod 10 in the direction perpendicular to its long axis under the conditions of a compressive load of 3 N, a pressure jig head diameter of φ12 mm, and a compression time of 10 seconds. The following paper was used as the first plug wrap 14. S52-7000 paper manufactured by Nippon Paper Papylia Co., Ltd. (basis weight: 52 gsm, air permeability: 7000 CORESTA units, thickness: 110 μm). Hereinafter, in the measurement of hardness in this disclosure, this paper will be used as the first plug wrap 14.

[0039] The inventors of the present disclosure produced multiple filter rods 10 as described above using various raw webs with different basis weights and widths, and investigated the relationship between the filling weight of the paper sheet 12 in the filter rod 10 and the stiffness in the directions perpendicular to the longitudinal direction. Multiple filter rods 10 were produced as described above using various raw webs with different basis weights and widths, and the paper sheet 12 was crimped to three different depths: 0.3 mm, 0.5 mm, and 0.7 mm.

[0040] 3A to 3C, when the paper sheet 12 is crimped deeply, the stiffness of the filter rod 10 in the direction perpendicular to the longitudinal direction generally tends to increase. However, regardless of the crimping method used, it was found that as long as the filter rod 10 contains a paper sheet weighing 0.6 g or more, stiffness of 70% or more in the longitudinal direction and perpendicular to the longitudinal direction is guaranteed. Considering the packing density of the paper sheet 12 within the filter rod 10, if the volume of the filter rod 10 is 4,345.2 mm as described above, ３ Using this, 600 mg / 4,345.2 mm ３ = 0.13808 (omitted) ≒ 0.138 mg / mm ３ In other words, the packing density of the paper sheet 12 in the filter rod 10 is set to 0.138 mg / mm ３ In particular, when the paper sheet 12 is crimped to a depth of 0.5 mm, the threshold packing density of the paper sheet 12 for ensuring a hardness of 70% or more in the longitudinal direction and perpendicular to the longitudinal direction is 0.111 mg / mm ３ The threshold value when a crimping process is performed to a depth of 0.5 mm is 0.106 mg / mm ３ It was found that:

[0041] Now, the crimp depth will be explained. Figure 4 is a schematic diagram showing the paper sheet 12 that has been subjected to the crimping process.

[0042] As shown in Figure 4, crimping a flat paper sheet 12 forms peaks 12a and valleys 12b. The difference h between the maximum height of the peaks 12a and the maximum depth of the valleys 12b of the paper sheet 12 is called the crimp depth of the paper sheet 12. For example, the crimp depth is determined by the meshing depth (amount of meshing) of a pair of rollers used to crimp the flat paper sheet 12 (or its original web).

[0043] [Examples] Based on the above results, the inventors of the present disclosure conducted thorough measurements on the following three examples. Figure 5A is a graph showing the stiffness and airflow resistance in the longitudinal direction when each example was crimped to a depth of 0.3 mm. Figure 5B is a graph showing the stiffness and airflow resistance in the longitudinal direction when each example was crimped to a depth of 0.5 mm. Figure 5C is a graph showing the stiffness and airflow resistance in the longitudinal direction when each example was crimped to a depth of 0.7 mm. Figure 6 is a graph showing the relationship between crimp depth and stiffness in the longitudinal direction for each example. Figure 7 is a graph showing the relationship between crimp depth and appearance for each example.

[0044] In the three examples, the filter rods 10 were constructed so that the circumference was 21.3 mm, using paper sheets 12 obtained by cutting a raw web having the basis weight and width shown in Table 1 to a length of 120 mm as described above. Figures 5A to 5C show the fill weight of the paper sheet for each rod. For example, in the first example, the basis weight of the raw web was 25 g / m ２ , width 220 mm, and cut to a length of 120 mm, the filling weight of the paper sheet 12 contained in the filter rod 10 is 25 g / m ２ × 0.22 m × 0.12 m = 0.66 g. Similarly, the weight is calculated as 0.648 g for the second embodiment and 0.672 g for the third embodiment. Rounding these values ​​to three decimal places gives the fill weight of the paper sheet per rod shown in Figures 5A to 5C. In all of the first to third embodiments, the filter rod 10 contains a paper sheet 12 weighing 0.6 g or more.

[0045] As shown in Figure 5A, when crimping was performed to a depth of 0.3 mm, the stiffness of the filter rod 10 in the longitudinal direction was measured to be 71.5% in Example 1, 72.6% in Example 2, and 75.2% in Example 3. On the other hand, the airflow resistance of the filter rod 10 in this case was 152 mmH ２ O, 123mmH in the second example ２ O, 84mmH in the third example ２The measured value was 152 mmH. ２ O / 120mm = 1.266 (omitted) mmH ２ Similarly, in the second embodiment, the ２ O / mm, 0.7 mmH in the third example ２ As described above, the first plug wrap 14 was made of S52-7000 paper (basis weight: 52 gsm, air permeability: 7000 CORESTA units, thickness: 110 μm) manufactured by Nippon Paper Papylia Co., Ltd.

[0046] In addition, when the packing density of the paper sheet 12 in the filter rod 10 is calculated, the volume of the filter rod 10 is 4,345.2 mm3 as described above. ３ Using this, in the first example, 660 mg / 4,345.2 mm ３ =0.15189 (hereinafter omitted) mg / mm ３ Similarly, in the second example, ３ , 0.159439 mg / mm in the third example ３ In all of the first to third embodiments, the packing density of the paper sheet 12 in the filter rod 10 is 0.138 mg / mm ３ From this, it can be seen that the hardness of 70% or more in the longitudinal direction and perpendicular to the longitudinal direction is guaranteed (even before the hardness of each example is actually measured).

[0047] Next, as shown in Figure 5B, when crimping was performed to a depth of 0.5 mm, the stiffness of the filter rod 10 in the longitudinal direction was measured to be 82.8% in Example 1, 81.3% in Example 2, and 80.4% in Example 3. On the other hand, the airflow resistance of the filter rod 10 in this case was 530 mmH ２ O, 378mmH in the second example ２ O, 269mmH in the third example ２ The measured value was 530 mmH. When the airflow resistance per 1 mm of length was calculated, the first example was 530 mmH. ２ O / 120mm = 4.416mmH ２ Similarly, in the second embodiment, the２ O / mm, in the third embodiment it is 2.416 (omitted) ≒ 2.42 mmH ２ O / mm.

[0048] Furthermore, as shown in Figure 5C, when crimping was performed to a depth of 0.7 mm, the stiffness of the filter rod 10 in the longitudinal direction was measured to be 84.2% in Example 1, 83.5% in Example 2, and 84.0% in Example 3. On the other hand, the airflow resistance of the filter rod 10 in this case was 710 mmH ２ O, 579mmH in the second example ２ O, 419mmH in the third example ２ The measured value was 710 mmH. ２ O / 120mm = 6mmH ２ Similarly, in the second embodiment, 4.825 ≒ 4.83 mmH ２ O / mm, in the third embodiment 3.4916 (omitted) ≒ 3.49 mmH ２ O / mm.

[0049] The above measurement results are summarized in Table 2 below.

[0050] Filling weight (g), packing density (mg / mm ３ ) and width (mm) and basis weight (g / m ２ The ratio of the hardness (%) in the longitudinal direction and the airflow resistance (mmH) is a quantity determined from the width and basis weight of the raw paper sheet 12, and is a quantity specific to each example. The values ​​actually measured for each example are the hardness (%) in the longitudinal direction and the airflow resistance (mmH ２ O).

[0051] As shown in Table 2, a hardness of 70% or more in the longitudinal direction was obtained for each Example. As described above, this measurement result was as expected from the selection of the width and basis weight of the raw paper sheet 12 for each Example. Furthermore, as shown in Figure 6, it was specifically confirmed that the hardness in the direction perpendicular to the longitudinal direction of the filter rod 10 increases as the crimp depth applied to the paper sheet 12 increases.

[0052] Furthermore, as shown in Figure 7, for all of Examples 1 to 3, the smaller the crimp depth, the more noticeable the voids (small holes) in the filter rod 10, resulting in a less desirable appearance. As can be seen from Figure 7, for Examples 1 to 3, a desirable appearance can be obtained by crimping the raw paper sheet 12 by at least 0.3 mm. Furthermore, for each Example, a more desirable appearance can be obtained by crimping the raw paper sheet 12 by 0.5 mm or more.

[0053] As shown in Table 1, the three examples differ in the basis weight and width of the paper sheet 12 roll. As shown in Table 2, by appropriately selecting the basis weight-to-width ratio of the roll, it was found possible to achieve a desired airflow resistance while maintaining a longitudinal stiffness of 70% or more. Specifically, it was found that selecting a low basis weight and a large width of the roll allows for the production of a filter rod 10 with high airflow resistance, while selecting a high basis weight and a small paper width allows for the production of a filter rod 10 with low airflow resistance. Furthermore, the ratio of the width to basis weight of the roll for each example was calculated as follows: 220 (mm) / 25 (g / m²) = 8.8 for Example 1. Similarly, it was 6 for Example 2 and 3.5 for Example 3. If the raw roll of the paper sheet 12 is selected so that the ratio of the width of the raw roll to the basis weight is large, the airflow resistance of the filter rod 10 can be increased, and if this ratio is selected so that it is small, the airflow resistance of the filter rod 10 can be decreased.

[0054] Figure 8A is a graph showing the fill weight and airflow resistance of filter rods 10 when a plurality of paper sheets 12, including those of the Examples, each having different basis weights and widths, are crimped to a depth of 0.3 mm. Figure 8B is a graph showing the fill weight and airflow resistance of filter rods 10 when a plurality of paper sheets 12, including those of the Examples, each having different basis weights and widths, are crimped to a depth of 0.5 mm. Figure 8C is a graph showing the fill weight and airflow resistance of filter rods 10 when a plurality of paper sheets 12, including those of the Examples, each having different basis weights and widths, are crimped to a depth of 0.3 mm.

[0055] In Figures 8A to 8C, the three points surrounded by ellipses represent the first to third examples described above. Specifically, of the points surrounded by ellipses, the upper point represents the first example, the middle point represents the second example, and the lower point represents the third example. The results shown in Figures 8A to 8C show that even when maintaining the same filling volume, the airflow resistance can be adjusted by changing the paper conditions (i.e., the width and basis weight of the raw web).

[0056] The measured values ​​of the airflow resistance of the first to third examples shown in Table 2 and Figures 8A to 8C are within a suitable range for the filter rod 10 used in a flavor inhalation article heated in a flavor inhaler. Specifically, for a flavor inhalation article heated in a non-combustion-side heating type flavor inhaler, the airflow resistance is 45 to 135 mmH along the airflow direction of the flavor inhalation article. ２ It is known that it is preferable for the airflow resistance to be in the range of 60 to 120 mmH. ２ More preferably, it is 80 to 110 mmH ２ O is most preferred.

[0057] The airflow resistance of a flavor inhalation article is considered to be the sum of the airflow resistance of the flavor source located upstream (opposite the downstream end inhaled by the user) and the airflow resistance of the filter located downstream. Here, air flowing into the flavor inhalation article is divided into air flowing from the upstream tip of the flavor inhalation article (opposite the downstream end inhaled by the user) and air flowing from a vent hole provided near the filter further downstream. Of the air reaching the user's oral cavity, the air flowing from a vent hole provided near the downstream filter is represented as Vf (%). Because the airflow resistance of the flavor source does not affect the air flowing from the vent hole provided near the downstream filter, not all of it contributes to the airflow resistance of the entire flavor inhalation article; only the airflow resistance multiplied by 100-Vf (%) contributes.

[0058] As a specific example, Vf is 60% and the airflow resistance is 70 mmH ２ The flavor source is 0 and the air flow resistance per 1 mm of length is 0.7 mmH ２ Consider a flavored article including a filter rod 10 having a resistance to airflow of 70 mmH and a filter made by cutting the filter rod 10 into 8 mm segments. In this case, the resistance to airflow of the flavored article is 70 mmH. ２ O x (1-0.6) (contribution from flavor source) 0.7 mmH ２ Add 0 / mm x 8mm (contribution from the filter) to get 28 + 5.6 = 33.6 mmH ２ The answer is O.

[0059] Although the details of the calculation are omitted, as an example, when Vf is 40% or more and 60% or less and the ventilation resistance of the flavor source is 70 mmH ２ O or more 250mmH ２ When the airflow resistance of the entire flavor inhalation article is set to 45 to 135 mmH ２ To fit within the range of 0, the filter rod 10 used as a paper filter must have an airflow resistance of 0.7 mmH per 1 mm of length. ２ O / mm or more 3.5mmH ２The values ​​for each example shown in Table 2 fall within this range, except for the first example where the crimp depth is 0.5 mm or 0.7 mm, and the second example where the crimp depth is 0.7 mm.

[0060] As mentioned above, the width (mm) of the raw sheet / basis weight (g / m ２ The values ​​of width (mm) / basis weight (g / m) are 8.8 in the first example, 6 in the second example, and 3.5 in the third example. It is considered that the ratio of the width to the basis weight of the paper sheet 12 roll determines the value of the airflow resistance of the filter rod 10. Therefore, it is considered that the ratio of width (mm) / basis weight (g / m) of the paper sheet 12 roll is 3.5<. ２ ) < 8.8, it can be said that a filter rod 10 with a suitable airflow resistance can be manufactured. It has been found that a suitable airflow resistance of the filter rod 10 can be obtained even if the lower limit of the range is expanded as follows: 2.2 < width (mm) / basis weight (g / m ２ ) <8.8

[0061] In the three examples, the width of the original paper sheet 12 is 140 mm or more and 220 mm or less, and the basis weight is 25 g / m ２ 40g / m or more ２ However, it has been found that a filter rod 10 having suitable airflow resistance and hardness can be manufactured even if the range is expanded as follows: The width of the raw roll of the paper sheet 12 is 110 mm or more and 220 mm or less, and the basis weight of the raw roll of the paper sheet 12 is 25 g / m ２ 50g / m or more ２ The following is the result.

[0062] [Study on the Lower Limit of Crimp Depth] The inventors of the present disclosure further investigated the desirable lower limit of crimp depth. Figure 9 shows the relationship between crimp depth and appearance for a filter rod 10 including a paper sheet 12 made from a specified base roll. Figure 10 is a graph showing the relationship between crimp depth and the area and number of voids (small holes) for the filter rod 10 of Figure 9.

[0063] Here, unlike the first to third examples described above, the basis weight is 40 g / m ２The raw roll used had a width of 280 mm. As described above, the raw roll was cut into a length of 120 mm to obtain a paper sheet 12, and the filter rod 10 was configured to have a circumference of 21.3 mm, and measurements were carried out on this paper sheet 12.

[0064] 9, when the crimp depth is 0.16 mm or 0.2 mm, the cavities in the filter rod 10 are noticeable, which is undesirable from the viewpoint of appearance. On the other hand, when the crimp depth is 0.3 mm or 0.35 mm, the cavities formed in the filter rod 10 are within the acceptable range.

[0065] Figure 10 is a graph showing the results of image analysis performed on the four types of filter rods 10 shown in Figure 9. In the image analysis shown in Figure 10, a "high-performance 16x speed 470,000 pixel black and white camera CA-H048MX" manufactured by Keyence Corporation was used as the camera. Other equipment is as shown in Table 3 below.

[0066] The results shown in Figure 10 are based on image analysis commonly performed by those skilled in the art. Specifically, the analysis follows the following process flow: (1) capturing an image of a cross section perpendicular to the longitudinal direction of the filter rod 10, (2) performing shading correction and binarization as preprocessing, and (3) performing blob processing to extract the area of ​​black lumps (corresponding to voids).

[0067] In FIG. 10, the vertical axis represents the number of voids in the cross section of the filter rod 10, and the horizontal axis represents the number of pixels. Here, 1 pixel is 0.000436 mm. ２ In Figure 10, the black dots (12YAF) indicate the measured values ​​for a conventional acetate filter rod. As shown in Figure 10, when the crimp depth is 0.16 mm or 0.2 mm, a large cavity is formed in the cross section of the filter rod 10, and the shape of the graph is significantly different from that of an acetate filter rod. On the other hand, when the crimp depth is 0.3 mm or 0.35 mm, the shape of the graph is closer to that of an acetate filter rod.

[0068] The presence of voids in the filter rod 10 is not only problematic from an aesthetic standpoint of appearance, but can also be a technical problem. Specifically, if voids are formed in the filter rod 10, the flavor source (for example, shredded tobacco leaves or shredded tobacco sheets) may spill out from the tip of the flavor inhalation article that includes the filter rod 10 and the flavor source, or sidestream smoke generated from the flavor source may leak out of the flavor inhalation article, causing contamination of the flavor inhaler.

[0069] In view of the above measurement results, it can be said that it is desirable to impart a crimp depth of at least 0.3 mm to the paper sheet 12 used in the filter rod 10.

[0070] [Configuration of Flavor Inhalation Article] A flavor inhalation article can be configured using a paper plug obtained by cutting the filter rod 10 to a predetermined length along the longitudinal direction as a filter. Fig. 11 is a schematic side cross-sectional view showing an example of a flavor inhalation article 110 using a paper filter. Fig. 12 is a schematic side cross-sectional view of another example of a flavor inhalation article 200 using a paper plug 20 obtained by cutting the filter rod 10 along the longitudinal direction.

[0071] 11 , the flavor inhalation article 110 includes a smokable article 111, a tubular member 114, a hollow filter portion 116, and a filter portion 115. The filter portion 115 is formed of a paper plug 20 obtained by cutting the filter rod 10 in the longitudinal direction. The filter portion 115 is an example of a first plug of the present disclosure.

[0072] The smokable article 111 is wrapped in cigarette paper 112. The tubular member 114, hollow filter portion 116, and filter portion 115, together with a portion of the smokable article 111 wrapped in cigarette paper 112, are wrapped in tipping paper 113 that is different from the cigarette paper 112. The tipping paper 113 also wraps a portion of the cigarette paper 112 that wraps the smokable article 111. This connects the tubular member 114, hollow filter portion 116, and filter portion 115 to the smokable article 111. The smokable article 111 wrapped in cigarette paper 112 is an example of a second plug of the present disclosure.

[0073] A lip release agent 117 is applied to the outer surface of the tipping paper 113 near the end on the filter part 115 side, so that the user's lips can easily separate from the tipping paper 113. The portion of the flavor inhalation article 110 to which the lip release agent 117 is applied functions as the mouthpiece of the flavor inhalation article 110.

[0074] The cylindrical member 114 may be provided with openings concentrically in the circumferential direction of the cylindrical member 114. These openings are intended to promote the inflow of air from the outside when the user inhales, and the air flowing in through the openings can lower the temperature of the components and air flowing in from the flavor inhalation article 110.

[0075] The smokable article 111 may include a flavor source, such as tobacco, and an aerosol source. The cigarette paper 112 wrapping the smokable article 111 may be a breathable sheet material. The tubular member 114 may be a paper tube or a hollow filter, but is not particularly limited thereto and may be made of other materials. In the example shown in FIG. 2 , the flavor inhalation article 110 includes the smokable article 111, the tubular member 114, a hollow filter portion 116, and a filter portion 115, but the configuration of the flavor inhalation article 110 is not limited thereto. For example, the hollow filter portion 116 may be omitted, and the tubular member 114 and the filter portion 115 may be disposed adjacent to each other.

[0076] In order to adjust the flavor of the flavor inhalation article, the raw roll of the paper sheet 12 may be treated when manufacturing the filter rod 10. For example, at least one of a phenol-reducing material and a flavoring agent may be added to the raw roll of the paper sheet 12.

[0077] The term "phenols" refers to a class of compounds in which one or more hydroxyl groups are bonded to an aromatic hydrocarbon group. Examples include phenol, o-cresol, m-cresol, p-cresol, and catechol. Therefore, a "phenol-reducing material" in the present disclosure is an additive that can reduce at least one phenol, such as phenol, o-cresol, m-cresol, p-cresol, and / or catechol, when the paper plug 20 is used as the filter portion 115 of the flavor inhalation article 110, as can be measured, for example, using a standard smoking test.

[0078] The inventors of the present disclosure have confirmed that the airflow resistance of the paper plug 20 constituting the filter portion 115 is 0.7 mmH per 1 mm in the airflow direction. ２ O / mm or more 3.5mmH ２ It has been found that a surface roughness of 0 / mm or less is preferable for configuring the flavor inhalation article 110 used in a non-combustion heating type flavor inhaler.

[0079] 11, the paper plug 20 is used to form the filter portion 115 of the flavor inhalation article 110, but the use of the paper plug 20 in the flavor inhalation article is not limited to a paper filter. For example, as shown in FIG. 12, it is also possible to manufacture a flavor inhalation article 200 in which the paper plug 20 forms the upstream tip of the flavor inhalation article (opposite the downstream end that is inhaled by the user).

[0080] As shown in Fig. 12, the flavor inhalation article 200 includes a first segment 210, a flavor generating segment 220, a cooling segment 230, and a second segment 240. The flavor inhalation article 200 includes a first end 201 that is inserted into a flavor inhaler and a second end 102 opposite the first end 201. In the example shown in Fig. 12, the flavor inhalation article 200 extends in the longitudinal direction along the central axis AX, and is formed with a first end 201 and a second end 202 at both ends along the longitudinal direction. Hereinafter, the first end 201 side and the second end 202 side will be referred to as the upstream side and the downstream side, respectively. Furthermore, hereinafter, unless otherwise specified, the terms "radial direction" and "circumferential direction" refer to the radial direction and the circumferential direction of a rotating coordinate system whose axis is the central axis AX.

[0081] The first segment 210 is a segment located on the first end 101 side of the flavor generating segment 220. The first segment 210 preferably extends from the first end 201 to the end of the flavor generating segment 220 on the first end 201 side. The first segment 210 has a plug portion 211 and a tubular second tipping paper 250 that covers the plug portion 211. The plug portion 211 is composed of a paper plug 20 obtained by cutting the filter rod 10 in the longitudinal direction. The second tipping paper 250 covers not only the plug portion 211 but also the flavor source 221 wrapped in cigarette paper 248 (described below), and connects the first segment 210 and the flavor generating segment 220. The plug portion 211 is an example of a first plug of the present disclosure.

[0082] The flavor generating segment 220 includes a flavor source 221 and a tubular cigarette paper 248 that covers the flavor source 221. The flavor source 221 is not particularly limited as long as it generates a flavor when heated, but is preferably a tobacco material. Examples of tobacco materials include materials obtained by processing dried tobacco leaves, such as shredded tobacco, and tobacco extracts (extracts made from water, organic solvents, or a mixture thereof). The flavor source 221 may be composed of one or more tobacco sheets. The tobacco sheet may be formed, for example, by processing dried tobacco leaves into a homogenized sheet (hereinafter referred to as a homogenized sheet) using a known method such as papermaking, slurrying, or rolling. The flavor source 221 may also be a shredded tobacco sheet. The flavor source 221 may contain at least one of a flavoring, a cooling agent, and a flavoring agent, instead of or in addition to the tobacco material. The flavor generating segment 220 (the flavor source 221 wrapped in the cigarette paper 248) is an example of a second plug of the present disclosure.

[0083] The cooling segment 230 has a hollow tube 231 and a tubular tipping paper 260 that covers the hollow tube 231. The hollow tube 231 may be, for example, a paper tube. The hollow tube 231 cools the vapor or aerosol generated in the flavor source 221. By arranging the hollow tube 231 downstream of the flavor source 221 in this manner, the vapor or aerosol generated in the flavor source 221 can be cooled. As shown in FIG. 12 , the tipping paper 260 covers not only the hollow tube 231 but also the second tipping paper 250, a portion of the flavor source 221 wrapped around the cigarette paper 248, and an outer plug wrap 350 (described later), thereby connecting the flavor generating segment 220, the cooling segment 230, and the second segment 240.

[0084] A plurality of circular through-holes 232 that penetrate the walls of hollow tube 231 and tipping paper 260 in the radial direction are formed in hollow tube 231 and concentrically aligned around hollow tube 231. Through-holes 232 are holes that promote the inflow of air from the outside when the user inhales, and this inflow of air can further cool the vapor or aerosol generated in flavor source 221.

[0085] The second segment 240 is a segment disposed on the second end 102 side of the cooling segment 230. The second segment 240 has a first filter 241 and a second filter 242 aligned in the longitudinal direction, and an outer plug wrap 350 covering the first filter 242 and the second filter 242. The second segment 240 is not particularly limited as long as it functions as a filter, such as adjusting the flow of air during flavor inhalation or adjusting the amount of flavor or other impurities. The second segment 240 can also function as a rear plug to prevent components located on the first end 201 side of the second segment 240 from falling out.

[0086] 12, the position of the first filter 241 may be interchanged with that of the second filter 242. In the flavor inhalation article 200, the second filter 242 may be omitted, or the second segment 240 may include three or more filters.

[0087] The first filter 141 includes a filler material 310 and a cylindrical first inner plug wrap 320 that encases the filler material 310. The filler material 310 is not particularly limited as long as it is a filtering material, and may be a fibrous material, a porous material, or the like. The filler material 310 may be, for example, cellulose acetate fiber, paper, or a nonwoven fabric. The filler material 310 may be composed of a paper plug 20 obtained by cutting the filter rod 10 longitudinally.

[0088] The second filter 242 is composed of a hollow packed layer 330 and a second inner plug wrap 340 that covers the packed layer 330. The packed layer 330 may be, for example, a rod made of cellulose acetate fibers packed at high density and hardened with a plasticizer containing triacetin. The second inner plug wrap 340 may be omitted.

[0089] The method for measuring "hardness (%)" in this disclosure will now be described. The measurement device may be a "SODIUM-H hardness module" (Korber) or an alternative device. As shown in FIG. 13, a 120 mm long filter rod 10 is inserted vertically from above into a predetermined position in the measurement device 30, and pressure is applied from the side using a cylindrical jig 32. In this test, the pressure was set to 300 g. The jig 32 used had a diameter of φ12 mm. The pressure was applied by placing the jig 32 at a position at least 6 mm vertically above the lower vertical end of the filter rod 10.

[0090] The measurement conditions for the measurement device are described below. Device: SODIUM-H hardness module Procedure: Pressure is applied from the side of the test piece, and the value calculated from the diameter before and after pressure is read as the hardness. <Calculation formula> Hardness in the direction perpendicular to the long axis (%) = (Dd / Ds) x 100 Ds (mm) is the diameter of the cross section of the filter rod 10 in the direction perpendicular to the long axis direction before pressure is applied, and Dd (mm) is the diameter of the cross section of the filter rod 10 in the direction perpendicular to the long axis direction when pressure is applied. <Measurement device conditions> Pressure: 300 g, pressure time: 10 seconds, pressure jig head diameter: φ12 mm, number of test pieces during measurement: 1

[0091] (Operation of the Present Embodiment) In the present embodiment, the paper plug 20 (obtained by cutting the filter rod 10 to a predetermined length in the longitudinal direction) has a hardness in the direction perpendicular to the long axis, as defined by the following formula (1), of 70.0% or more. Therefore, according to the present embodiment, a paper plug 20 with sufficient hardness can be provided, which can smoothly execute the manufacturing process of the flavor inhalation article 110 and contribute to imparting a luxurious feel to the flavor inhalation article 110. Hardness in the direction perpendicular to the long axis (%) = (Dd / Ds) x 100 (1) (In formula (1), Ds (mm) is the diameter of the cross section of the paper plug in the direction perpendicular to the long axis direction before the load F is applied, Dd (mm) is the diameter of the cross section of the paper plug in the direction perpendicular to the long axis direction when the load F is applied, and the load F is the load applied to the paper plug in the direction perpendicular to its long axis under the conditions of a compressive load of 3 N, a pressure jig head diameter of φ12 mm, and a compression time of 10 seconds.)

[0092] Furthermore, in this embodiment, the ratio of the width to the basis weight of the original web of the paper sheet 12 satisfies the following formula (2): 2.2< width (mm) / basis weight (g / m2) < 8.8 (2) The paper plug 20 formed by winding the paper sheet 12 manufactured from the original web having such a width and basis weight has appropriate hardness and airflow resistance for use in the flavor inhalation article 110. Therefore, according to this embodiment, a paper plug 20 having appropriate hardness and airflow resistance can be provided.

[0093] In this embodiment, the packing density of the paper sheet 12 in the paper plug 20 is 0.138 mg / mm ３ The paper plug 20 having such a configuration has an appropriate hardness. Therefore, according to this embodiment, it is possible to provide a paper plug 20 having an appropriate hardness.

[0094] In this embodiment, the paper sheet 12 is formed from a crimped sheet containing cellulose. When the paper sheet 12 is manufactured from a crimped sheet containing cellulose, the stiffness of the paper plug 20 generally increases, and the airflow resistance increases. Furthermore, the crimping process makes small holes formed in the cross section perpendicular to the longitudinal direction of the paper plug 20 less noticeable, and reduces the variation in airflow resistance between manufactured paper plugs 20. Therefore, in this embodiment, by crimping the sheet that is the base material for the paper sheet 12, the stiffness and airflow resistance of the paper plug 20 can be easily improved, the voids can be made less noticeable, and the airflow resistance can be stabilized.

[0095] In this embodiment, the cellulose-containing sheet that forms the base web of the paper sheet 12 is crimped to a crimp depth of 0.3 mm or more. When a sheet with a crimp depth of 0.3 mm or more is used, the cavities formed in the cross section perpendicular to the longitudinal direction of the paper plug 20 are within an acceptable range. Therefore, this embodiment can provide a paper plug 20 that is desirable from the standpoint of appearance.

[0096] In this embodiment, the raw web of the paper sheet 12 has a width of 110 mm or more and 220 mm or less, and a basis weight of 25 g / m ２ 50g / m or more ２ The paper plug 20 formed by winding the paper sheet 12 manufactured from such a raw web has appropriate hardness and air resistance. Therefore, according to this embodiment, it is possible to provide a paper plug 20 having appropriate hardness and air resistance.

[0097] In this embodiment, the airflow resistance of the paper plug 20 in the airflow direction is 0.7 mmH ２ O / mm or more 3.5mmH ２ 0 / mm or less, and the paper plug 20 is used as the filter portion 115 of the flavor inhalation article 110. Therefore, according to the present embodiment, a paper plug 20 having hardness and air resistance suitable for use as the filter portion 115 of the flavor inhalation article 110 can be provided.

[0098] Furthermore, in this embodiment, the raw sheet of filler material for the paper plug 20 used in the flavor inhalation article 110 contains an additive for adjusting the flavor. Therefore, according to this embodiment, it is possible to provide the paper plug 20 constituting the flavor inhalation article 110 that generates a suitable flavor when heated.

[0099] Furthermore, in this embodiment, the raw paper sheet 12 of the paper plug 20 used in the flavor inhalation article 110 contains at least one of a phenol-reducing material and a flavoring agent. Therefore, according to this embodiment, it is possible to provide a paper plug 20 constituting a flavor inhalation article that generates a more suitable flavor.

[0100] Furthermore, in this embodiment, the flavor inhalation article 110 is configured to include a paper plug 20 as a filter portion 115 having a hardness of 70.0% or more in a direction perpendicular to the major axis as defined by the above formula (1), a smokable article 111 wrapped with cigarette paper 112 containing a flavor source, and tipping paper 113 that wraps around the smokable article 111 wrapped with the paper plug 20 and the cigarette paper 112. Thus, this embodiment can provide a flavor inhalation article 110 that includes a filter portion 115 that ensures sufficient hardness. Furthermore, the paper plug 20 can be used not as a paper filter, but as a member that constitutes the upstream tip of the flavor inhalation article (opposite the downstream end that is inhaled by the user).

[0101] Furthermore, in this embodiment, inside the flavor inhalation article 200, where air flows from upstream to downstream when a user inhales, a plug portion 211 formed by the paper plug 20 is disposed upstream of the flavor generating segment 220 (the flavor source 221 wrapped in cigarette paper 248). Thus, according to this embodiment, the plug portion 211 formed by the paper plug 20 can prevent the vapor or aerosol generated in the flavor generating segment 220 from leaking to the upstream side of the flavor inhalation article 200.

[0102] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments and various modifications are possible within the scope of the claims and the technical ideas described in the specification and drawings. Note that any shapes or materials not directly described in the specification and drawings are within the scope of the technical ideas of the present disclosure as long as they achieve the effects of the present disclosure.

[0103] (Supplementary Note 1) A first aspect of the present disclosure is a paper plug having a filler and an inner plug wrap around which the filler is wrapped, wherein the hardness in a direction perpendicular to the long axis, as expressed by the following formula (1), is 70.0% or more: Hardness in a direction perpendicular to the long axis (%) = (Dd / Ds) × 100 (1) (In formula (1), Ds (mm) is the diameter of a cross section of the paper plug in a direction perpendicular to the long axis direction before a load F is applied, Dd (mm) is the diameter of a cross section of the paper plug in a direction perpendicular to the long axis direction when a load F is applied, and the load F is a compressive load of 3 N applied to the paper plug in a direction perpendicular to its long axis, with a pressure jig head diameter of φ12 mm and a compression time of 10 seconds.)

[0104] (Supplementary Note 2) A second aspect of the present disclosure is the same as the first aspect, except that the width (mm) and basis weight (g / m ２ The ratio of width (mm) / basis weight (g / m) is in the range expressed by the following formula (2): 2.2< width (mm) / basis weight (g / m) ２ ) <8.8 (2)

[0105] (Supplementary Note 3) A third aspect of the present disclosure is the paper plug according to the first and second aspects, wherein the packing density of the filler in the paper plug is 0.138 mg / mm ３ That's it, Paper Plug.

[0106] (Supplementary Note 4) A fourth aspect of the present disclosure is a paper plug according to any one of the first to third aspects, wherein the filler contains cellulose and is formed from a crimped sheet.

[0107] (Supplementary Note 5) A fifth aspect of the present disclosure is the paper plug according to the fourth aspect, wherein the crimp depth of the sheet is 0.3 mm or more.

[0108] (Supplementary Note 6) A sixth aspect of the present disclosure is the above-mentioned first to fifth aspects, wherein the width of the raw sheet of the filler is 110 mm or more and 220 mm or less, and the basis weight of the raw sheet of the filler is 25 g / m ２ 50g / m or more ２ Below is the paper plug.

[0109] (Supplementary Note 7) A seventh aspect of the present disclosure is the first to sixth aspects, wherein the airflow resistance per 1 m in the airflow direction is 0.7 mmH ２ O / mm or more 3.5mmH ２ 0 / mm or less, and is a paper plug used in flavor inhalation articles.

[0110] (Supplementary Note 8) An eighth aspect of the present disclosure is the seventh aspect, wherein the raw roll of the filler is a paper plug containing an additive for adjusting flavor.

[0111] (Supplementary Note 9) A ninth aspect of the present disclosure is the paper plug according to the eighth aspect, wherein the additive includes at least one of a phenol-reducing material and a fragrance.

[0112] (Appendix 10) A tenth aspect of the present disclosure is a flavor inhalation article including: a paper plug according to any one of claims 1 to 9 as a first plug; a second plug containing a flavor source; and tipping paper wrapping the first plug and the second plug.

[0113] (Supplementary Note 11) An eleventh aspect of the present disclosure is the flavor inhalation article of the tenth aspect, wherein the paper plug is disposed upstream of the second plug.

[0114] DESCRIPTION OF SYMBOLS 10...Filter rod 12...Paper sheet 12a...Creek portion 12b...Trough portion 14...First plug wrap 20...Paper plug 110...Flavor inhalation article 111...Smokable article 112...Cigarette paper 113...Tipping paper 114...Cylindrical member 115...Filter portion 116...Hollow filter portion 117...Lip release agent 200...Flavor inhalation article 201...First end 202...Second end 210...First segment 211...Plug portion 220...Flavor generating segment 221...Flavor source 230...Cooling segment 231...Hollow tube 232...Through hole 240...Second segment 241...First filter 242...Second filter 248...Cigarette paper 250...Second tipping paper 260...Tipping paper 310...Filler material 320...first inner plug wrap 330...filler layer 340...second inner plug wrap 350...outer plug wrap

Claims

1. A paper plug comprising a filler and an inner plug wrap around which the filler is wound, The hardness in the direction perpendicular to the major axis, as shown in the following formula (1), is 70.0% or more. Paper plug. Hardness in the direction perpendicular to the long axis (%) = (Dd / Ds) × 100 (1) (In formula (1), Ds (mm) is the diameter of the cross-section of the paper plug in a direction perpendicular to the longitudinal axis before the load F is applied. Dd (mm) is the diameter of the cross-section of the paper plug in a direction perpendicular to the longitudinal axis when a load F is applied. Load F is a load applied to the paper plug in a direction perpendicular to its long axis, under the conditions of a compressive load of 3N, a pressure jig head diameter of φ12 mm, and a compression time of 10 seconds.

2. The width (mm) and basis weight (g / m²) of the aforementioned filler roll. ２ The ratio to ) is within the range expressed by the following equation (2): The paper plug according to claim 1. 2.2 < Width (mm) / Area (g / m²) ２ ) <8.8 (2)

3. The filling density of the filler in the paper plug is 0.138 mg / mm³. ３ That's all. The paper plug according to claim 1.

4. The filler contains cellulose and is formed from a crimped sheet. The paper plug according to claim 1.

5. The crimp depth of the aforementioned sheet is 0.3 mm or more. The paper plug according to claim 4.

6. The width of the raw material of the aforementioned filler is 110 mm or more and 220 mm or less. The basis weight of the raw material of the aforementioned filler is 25 g / m². ２ 50g / m or more ２ The following is: The paper plug according to claim 1.

7. The airflow resistance at 1m intervals in the airflow direction is 0.7mmH ２ 0 / mm or more, 3.5mmH ２ It is less than 0 / mm, Used in flavor inhalation products, The paper plug according to claim 1.

8. The raw material of the aforementioned filler contains additives for adjusting the flavor, The paper plug according to claim 7.

9. The aforementioned additive comprises at least one of a phenol reducing agent and a fragrance. The paper plug according to claim 8.

10. A paper plug according to any one of claims 1 to 9 as the first plug, The second plug contains the flavoring agent, Chipping paper for winding the first plug and the second plug including, Flavor suction article.

11. The paper plug is positioned upstream of the second plug. The flavor-inhaling article according to claim 10.