JP7423749B2 - Filters, smoking articles, and flavor suction articles - Google Patents

Description

FIELD OF THE INVENTION This invention relates to filters, smoking articles, and flavor suction articles.

For example, Japanese Patent Publication No. 2014-515933 discloses a paper filter coated on the surface of a biodegradable base material (paper).

For example, when using a filter (paper filter) in which a paper sheet is crimped and then folded, the user can usually visually recognize a large number of holes on the end surface on the mouth side. For example, after smoking a cigarette using a paper filter, substances such as tar tend to adhere to the mouth end surface of the filter. Therefore, it is required to improve the aesthetic appearance of the end face of the filter on the mouth side even after use such as after smoking. Filters are required to control the degree of filtration, such as tar value and nicotine value.

Japanese Patent Publication No. 7-166 Japanese Patent Application Publication No. 7-8254 Japan Special Table No. 2014-515933

The present invention provides a filter, a smoking article including the filter, and a flavor suction article including the filter, which are formed of a sheet of paper or a sheet of nonwoven fabric, have improved aesthetics, and have appropriate filtration characteristics. The purpose is to

A filter according to one embodiment includes a first filter body having a first end surface on the suction port side and a second end surface on the opposite side to the suction port side, and is formed of a paper sheet or a nonwoven fabric sheet; a second filter body, which is located on the side of the second end face of the first filter body, has a third end face opposite to the second end face, and is formed of a paper sheet or a nonwoven fabric sheet; It has a channel section that provides ventilation between the end surface and the first end surface. The airflow resistance of the channel portion is lower than the airflow resistance of the first filter body. Further, the paper sheet of the first filter body is crimped to a greater crimp depth than the paper sheet of the second filter body.

FIG. 1A is a schematic cross-sectional view showing a combustion type flavor suction article including a filter according to a first embodiment. FIG. 1B is a schematic diagram showing the end surface on the suction port side when the filter is viewed from the direction shown by arrow 1B in FIG. 1A. FIG. 1C is a schematic enlarged view of the position indicated by 1C in FIG. 1B. FIG. 1D is a schematic diagram showing a modified example of the end surface on the suction port side when the filter is viewed from the direction shown by arrow 1B in FIG. 1A. FIG. 1E is a schematic enlarged view of the position indicated by reference numeral 1E in FIG. 1D. FIG. 2A is a schematic cross-sectional view showing a combustion type flavor suction article including a filter according to a comparative example of the first embodiment. FIG. 2B is a schematic diagram showing the end face of the filter when viewed from the direction indicated by arrow 2B in FIG. 2A. FIG. 3A is a schematic diagram illustrating a state in which paper sheets forming the first filter body and the second filter body are passed through a crimp tool to achieve appropriate crimp depths. FIG. 3B is a schematic diagram showing the paper sheets forming the first filter body and the second filter body being passed through a crimp tool to achieve an appropriate crimp depth, which is larger than the example shown in FIG. 3A. be. FIG. 4A shows the crimp depth after crimping of the paper sheets that will become the first filter body and the second filter body, and the crimping depth per 1 mm of the filter body length that will become the first filter body and the second filter body after the crimping process. It is a graph showing ventilation resistance (mmH ₂ O/mm). Figure 4B shows the air permeability (CU) after crimping of the paper sheets that will become the first and second filter bodies, and the 1mm permeability of the filter bodies that have been crimped to become the first and second filter bodies. It is a graph showing the ventilation resistance (mmH ₂ O/mm) per unit area. FIG. 5 is a schematic diagram showing the filter structure, filter body length, tar value, nicotine value, carbon monoxide value, and number of smoke puffs of the first to third lots of combustion-type flavor suction articles with a tar value of 6 mg. It is. FIG. 6 is a schematic diagram showing the filter structure, filter body length, tar value, nicotine value, carbon monoxide value, and number of smoke puffs of the 4th to 6th lots of combustion-type flavor suction articles with a tar value of 1 mg. It is. FIG. 7A is a photograph showing the end surface on the suction side of the first filter body of the filter shown in FIG. 2B, which is formed from a sheet with a crimp depth of 0.6 mm. FIG. 7B is a photograph showing the end surface on the suction side of the first filter body of the filter shown in FIG. 2B, which is formed from a sheet with a crimp depth of 0.3 mm. FIG. 7C is a photograph showing the end surface on the suction side of the first filter body of the filter shown in FIG. 2B, which is formed from a sheet with a crimp depth of 0.1 mm. FIG. 8A is a photograph showing the mouth end surfaces of the eight cigarettes of the first lot shown in FIG. 5 after smoking. FIG. 8B is a photograph showing the mouth end surfaces of the eight cigarettes of the second lot shown in FIG. 5 after smoking. FIG. 8C is a photograph showing the mouth end surfaces of the eight cigarettes of the third lot shown in FIG. 5 after smoking. FIG. 9 is a table quantifying the whiteness of the mouthpiece side end surface of eight cigarettes from the first lot to the third lot. FIG. 10 is a graph showing the average value of the whiteness of the end surface on the mouthpiece side of each of the eight cigarettes from the first lot to the third lot in the table in FIG. FIG. 11 is a graph showing the average score of the sensory evaluation by 14 evaluators regarding the difference in the appearance of the end surface of the mouthpiece side of each cigarette from the first lot to the third lot after smoking compared to before smoking. FIG. 12 is a graph showing the average scores of the sensory evaluation by 14 evaluators regarding the dirtiness of the mouth end surface of each cigarette from the first lot to the third lot before and after smoking. FIG. 13A is a photograph showing the mouth end surfaces of the eight cigarettes of the fourth lot shown in FIG. 6 after smoking. FIG. 13B is a photograph showing the end face of the mouthpiece side of the eight cigarettes of the fifth lot shown in FIG. 6 after smoking. FIG. 13C is a photograph showing the mouth end surfaces of the eight cigarettes of the sixth lot shown in FIG. 6 after smoking. FIG. 14 is a table quantifying the whiteness of the end face on the mouthpiece side of eight cigarettes from the fourth lot to the sixth lot. FIG. 15 is a graph showing the average value of the whiteness of the mouthpiece side end surface of each of the eight cigarettes from the fourth lot to the sixth lot in the table in FIG. FIG. 16 is a graph showing the average score of the sensory evaluation by 14 evaluators regarding the difference in the appearance of the end surface of the mouthpiece side of each cigarette from the fourth lot to the sixth lot after smoking compared to before smoking. FIG. 17 is a graph showing the average scores of the sensory evaluation by 14 evaluators regarding the dirtiness of the mouth end surface of each of the cigarettes from the 4th lot to the 6th lot before and after smoking. FIG. 18A is a schematic diagram illustrating a state in which a filter body is folded into a pipe through a plurality of guides of a filter body forming machine with the ends of a plurality of sheets of nonwoven fabric being shifted and stacked one on top of the other. FIG. 18B is a schematic view showing a state in which a nonwoven fabric is stacked with the ends of a plurality of sheets shifted from the direction shown by arrow 18B in FIG. 18A. FIG. 19A is a schematic cross-sectional view of a flavor suction article including a filter according to a modification of the first embodiment. FIG. 19B is a schematic diagram showing the end surface on the suction port side when the filter is viewed from the direction indicated by arrow 19B in FIG. 19A. FIG. 20 is a schematic cross-sectional view showing a non-combustion heated flavor suction article including a filter according to a second embodiment. FIG. 21 is a schematic cross-sectional view showing a non-combustion heated flavor suction article including a filter according to a third embodiment.

Hereinafter, a filter used for a flavor suction article and a flavor suction article will be described using the drawings.

The flavor suction article member according to the embodiment includes a base member. The base member is, for example, a member for a flavor suction article used in combination with a tobacco material. The base member may be at least one of a member constituting a combustion type flavor suction article, a member constituting a non-combustion heating type flavor suction article, and a member constituting a non-heating type flavor suction article.

The tobacco material is, for example, shredded tobacco. The material for shredding tobacco is not particularly limited, and known materials such as lamina and backbone can be used. The tobacco material may be in the form of granules, for example, in addition to shredded tobacco.

Combustion flavor inhalation articles are smoking articles that provide tobacco flavor to consumers by burning tobacco material.

A non-combustible heated flavor suction article is an article that provides tobacco flavor to consumers by heating the tobacco material without burning it. The heating temperature of the non-combustion heated flavor suction article can be set as appropriate, and ranges over a wide range, for example, from a temperature close to room temperature to a temperature at which the tobacco material does not burn. The heating temperature of the non-combustion heated flavor suction article is, for example, about 30°C to 350°C.

Non-heated flavor suction articles are articles that provide tobacco flavor to consumers without burning or heating the tobacco material.

[First embodiment]
In the first embodiment, a cigarette, which is a representative example of a combustion type flavor suction article (smoking article) 10 containing tobacco material, will be described. In a first embodiment, an example of a cigarette 10 will be described with reference to FIGS. 1A to 17.

A cigarette 10 according to this embodiment is shown in FIGS. 1A to 1C. As a comparative example of the cigarette 10 according to the present embodiment, a cigarette 110 is shown in FIGS. 2A and 2B. Identical structural parts of the cigarettes 10 and 110 are given the same reference numerals. Regarding the cigarette 110, description of the same structural parts as the cigarette 10 will be omitted as appropriate.

FIG. 1A is a cross-sectional view of the cigarette 10. Cigarette 10 includes a tobacco rod 12, a filter 14, and tipping paper 16. The total length of the cigarette 10 is, for example, about 65 mm to 100 mm. The outer diameter of the cigarette 10 is, for example, about 5 mm to 10 mm.

The tobacco rod 12 includes a tobacco material (shredded tobacco) 22 and a wrapping paper 24 wrapped around the tobacco material 22. The tobacco rod 12 according to this embodiment has, for example, a diameter of about 7 mm and a length of about 83 mm.

The filter 14 includes a first filter plug 32 on the mouth side, a second filter plug 34 on the tobacco rod 12 side, and a molded paper 36 wound around the first filter plug 32 and the second filter plug 34. The length of the first filter plug 32 along the longitudinal axis L, which will be described later, is L1, and the length of the second filter plug 34 along the longitudinal axis L is L2.

The first filter plug 32 includes a first filter body (filter element, filter medium) 42 and a first roll paper (cylindrical portion) 44 that wraps around the outer circumference of the first filter body 42 . The length L1 of the first filter plug 32 is the same as the length of the first filter body 42. A channel portion (ventilation portion) 43 is formed between the outer periphery of the first filter body 42 and the first paper roll 44 . Specifically, the channel portion 43 is located between the outer circumferential surface of the first filter main body 42 and the inner circumferential surface of the first paper roll (cylindrical portion) 44 .

The first filter main body 42 has a first end face (end face on the mouthpiece side) 46 on the mouthpiece side and a second end face (end face on the tobacco rod 12 side) 48 on the side opposite to the mouthpiece side. The outer shapes of the first end surface 46 and the second end surface 48 are, for example, approximately circular. A longitudinal axis (center axis) L that intersects the first end surface 46 and the second end surface 48 is defined in the first filter main body 42 . The first end surface 46 is on the mouthpiece side, and the second end surface 48 is on the tobacco rod 12 side. The first end surface 46 is exposed to the outside.

As shown in FIGS. 1A to 1C, the outer peripheral surface of the first filter main body 42 is formed, for example, like a spur gear. Therefore, the first filter main body 42 has a large number of convex portions 42a. Each convex portion 42a is continuously formed along the longitudinal axis L over the entire area between the first end surface 46 and the second end surface 48. The convex portion 42 a comes into contact with the inner circumferential surface of the first paper roll 44 .

The channel portion 43 has a plurality of recesses (channels) 43a formed in parallel to the longitudinal axis L on the outer periphery of the first filter main body 42, for example. Each recess 43a is formed between the protrusions 42a of the first filter main body 42. The convex portion 42a of the first filter body 42 and the concave portion 43a of the channel portion 43 are adjacent to the outer periphery of the first filter body 42 in the circumferential direction with the longitudinal axis L as the center.

Each recess 43a of the channel portion 43 is continuously formed along the longitudinal axis L over the entire area between the first end surface 46 and the second end surface 48. The recessed portion 43a is spaced apart from the inner circumferential surface of the first paper roll 44. Therefore, the channel portion 43 is located inside the first paper roll (cylindrical portion) 44 and provides ventilation between the second end surface 48 and the first end surface 46 . The channel portion 43 is preferably formed to look like a so-called AFT filter.

The second filter plug 34 includes a second filter body (filter element, filter medium) 52 and a second winding paper (cylindrical portion) 54 that wraps around the second filter body 52 . The length L2 of the second filter plug 34 is the same as the length of the second filter body 52. The second filter body 52 has a third end surface 56 and a fourth end surface 58. The outer shapes of the third end surface 56 and the fourth end surface 58 are, for example, approximately circular. A longitudinal axis (central axis) L that intersects the third end surface 56 and the fourth end surface 58 is defined in the second filter main body 52 . The third end surface 56 is on the mouthpiece side, and the fourth end surface 58 is on the tobacco rod 12 side. The third end surface 56 faces or contacts the second end surface 48 .

For example, a plasticizer such as triacetin, an adsorbent such as activated carbon, and a flavoring agent such as menthol may be added to the first filter main body 42 and the second filter main body 52 as additives.

The formed paper 36 is wound around the outer peripheries of the first paper roll 44 and the second paper roll 54, and connects the first paper roll 44 and the second paper roll 54.

The tip paper 16 is wound around the outer circumferences of the tobacco rod 12 and the filter 14 so as to connect the tobacco rod 12 and the filter 14.

The first filter main body 42 and the second filter main body 52 are formed of paper sheets or nonwoven fabric sheets. In this embodiment, an example will be described in which the sheets (original fabrics) forming the first filter main body 42 and the second filter main body 52 are made of paper. As the paper sheet, those that can be used as a paper filter by those skilled in the art can be used as they are. In addition to the above, for example, glassine paper can be used as the sheet (original fabric) for the first filter body 42 and the second filter body 52.

For example, a paper sheet 72 is crimped by a crimping tool 70, which will be described later. The crimped sheet 72 is folded and formed into a rod shape of approximately 120 mm, for example. Thereafter, it is cut into appropriate lengths to form the first filter body 42 and the second filter body 52. The shape of the first filter body 42 is maintained by the first paper roll 44 . The shape of the second filter main body 52 is maintained by the second winding paper 54 . For example, when the first filter body 42 and the second filter body 52 are cut into appropriate lengths, the first filter body 42 and the second filter body 52 have planar end faces (the suction side end faces 46, 56, , and tobacco side end surfaces 48, 58).

The crimping process of the first filter body 42 and the second filter body 52 is performed by inserting a paper sheet 72 into an appropriate crimping tool 70 shown in FIGS. 3A and 3B in a direction penetrating the paper surface from the front of the paper surface in FIGS. 3A and 3B. This is done by passing the The crimp tool 70 shown in FIGS. 3A and 3B is formed to be appropriately long in the direction penetrating the page. The length of the crimping tool 70 in the direction of penetrating the paper surface is an appropriate length that allows the sheet 72 to be crimped. Preferably, the width of the crimping tool 70 is larger than the width of the sheet 72.

The crimping tool 70 includes a first base 82 , a second base 84 , a plurality of first protrusions 86 protruding from the first base 82 toward the second base 84 , and a plurality of first protrusions 86 extending from the second base 84 to the first base 82 . It has a plurality of second convex portions 88 that protrude toward the surface. The first base 82 and the second base 84 can be relatively close to each other and separated from each other. The amount of protrusion of the plurality of first protrusions 86 relative to the first base 82 is approximately the same. The plurality of first convex portions 86 are spaced apart from each other at predetermined intervals in the width direction. The amount of protrusion of the plurality of second protrusions 88 relative to the second base 84 is approximately the same. The plurality of second convex portions 88 are spaced apart from each other at predetermined intervals in the width direction. When the first base 82 and the second base 84 are brought close to each other, the first convex portion 86 and the second convex portion 88 are located at separate positions. Along the approach and separation directions of the first base 82 and the second base 84, the distance between the apex 86a of the first convex part 86 and the apex 88a of the second convex part 88 (sign D1 in FIG. 3A and FIG. 3B The symbol D2) in the middle is the amount of engagement. The distances D1 and D2 are preferably about 1 mm or less, for example. By adjusting the amount of engagement of the crimp tool 70, the crimp depth of the paper sheet 72 can be adjusted. The crimp depth can be replaced by the distance between the tops 86a, 88a of adjacent protrusions 86, 88 perpendicular to the moving direction of the sheet 72 of the crimping tool 70. When distance D1 in FIG. 3A is compared with distance D2 in FIG. 3B, distance D2 is larger. At this time, the crimp depth of the sheet 72 is greater in the example shown in FIG. 3B than in the example shown in FIG. 3A. While the sheet 72 is being crimped, the first base 82, second base 84, first protrusion 86, and second protrusion 88 of the crimping tool 70 are stopped from moving and their positional relationship is fixed.

The sheets of the first filter body 42 are crimped (creped) to a greater crimp depth than the sheets of the second filter body 52. That is, the crimp depth of the sheet of the first filter body 42 (the distance between the folds of the sheet) is greater than the crimp depth of the sheet of the second filter body 52 (the distance between the folds of the sheet).

The air permeability of the paper sheet (original fabric) of the first filter body 42 is, for example, 1,000 CU (coresta unit) to 30,000 CU after the crimping process. The air permeability of the paper sheet (original fabric) of the second filter body 52 is, for example, 0 CU to 10,000 CU after the crimping process.

Here, in FIG. 4A, the horizontal axis represents the crimp depth after the crimping process of the paper sheet used for the first filter body 42 and the second filter body 52, and the vertical axis represents the crimp depth after the crimping process of the paper sheet used for the first filter body 42 and the second filter body 52. A graph showing the ventilation resistance (mmH ₂ O/mm) per mm of the filter body that becomes the second filter body 52 is shown. It is recognized that the greater the crimp depth, the greater the airflow resistance per unit length. The dashed line in FIG. 4A is, for example,
y=17.965x ² +6.6054x+0.1372 (R ² =0.9963)
It can be approximated as

In FIG. 4B, the horizontal axis represents the air permeability (CU) of the paper sheets used for the first filter body 42 and the second filter body 52 after the crimping process, and the vertical axis represents the air permeability (CU) of the paper sheets used for the first filter body 42 and the second filter body 52 after the crimping process. A graph showing the ventilation resistance (mmH ₂ O/mm) per mm of the filter body that becomes the second filter body 52 is shown. The lower left plot in FIG. 4B is an example when the crimp depth is 0 mm. The upper right plot in FIG. 4B is an example where the crimp depth is 0.6 mm. The remaining plots in Figure 4B are examples where the crimp depth is 0.3 mm. It is recognized that as the crimp depth increases, not only the airflow resistance but also the air permeability (CU) increases. The dashed line in FIG. 4B is, for example,
y=-6*10 ^-9 x ² +0.0006x+0.1687 (R ² =1)
It can be approximated as

The crimp depth (distance between the tops 86a and 88a of the crimp tool 70) of the first filter body (paper filter) 42 is, for example, 0.6 mm. The crimp depth of the second filter body (paper filter) 52 is, for example, 0.2 mm.

The ventilation resistance of the first filter body 42 is preferably higher than the ventilation resistance of the second filter body 52. The ventilation resistance of the first filter body 42 is, for example, 0 mmH ₂ O/mm to 12 mmH ₂ O/mm, preferably 4 mmH ₂ O/mm to 12 mmH ₂ O/mm. The ventilation resistance of the second filter body 52 is, for example, 0 mmH 2 O/mm to 12 mm H ₂ O/mm, preferably 3 mm H 2 O/mm to 12 mm H ₂ O/mm.

The first paper roll 44, the second paper roll 54, and the molded paper 36 are made of, for example, pulp. The first paper roll 44, the second paper roll 54, and the molded paper 36 are used to maintain the shapes of the first filter body 42 and the second filter body 52. The basis weight of the first paper roll 44, the second paper roll 54, and the molded paper 36 is preferably 30 g/m ² or more, for example.

As shown in FIGS. 2A and 2B, the cigarette 110 of the comparative example includes a tobacco rod 12, a filter 114, and a tip paper 16. The overall length and outer diameter of cigarette 110 are set to be the same as cigarette 10. The tobacco rod 12 of the cigarette 110 shown in FIG. 2A is formed similarly to the tobacco rod 12 of the cigarette 10 shown in FIG. 1A.

The filter 114 includes a first filter plug 132 on the mouth side, a second filter plug 134 on the tobacco rod 12 side, and a molded paper 36 wound around the first filter plug 132 and the second filter plug 134.

The first filter plug 132 includes a first filter main body (filter element, filter medium) 142 and a first winding paper 144 that wraps around the outer circumference of the first filter main body 142.

The first filter main body 142 has a first end face (end face on the mouthpiece side) 146 on the mouthpiece side and a second end face (end face on the tobacco rod 12 side) 148 on the side opposite to the mouthpiece side. The outer shapes of the first end surface 146 and the second end surface 148 are, for example, approximately circular. A longitudinal axis (center axis) L that intersects the first end surface 146 and the second end surface 148 is defined in the first filter main body 142 . The first end surface 146 is on the mouthpiece side, and the second end surface 148 is on the tobacco rod 12 side. The first end surface 146 is exposed to the outside.

The second filter plug 134 includes a second filter body (filter element, filter medium) 152 and a second paper wrapper (cylindrical portion) 154 that wraps around the outer circumference of the second filter body 152. The length L2 of the second filter plug 134 is the same as the length of the second filter body 152. The second filter body 152 has a third end surface 156 and a fourth end surface 158. The external shapes of the third end surface 156 and the fourth end surface 158 are, for example, approximately circular. A longitudinal axis (center axis) L that intersects the third end surface 156 and the fourth end surface 158 is defined in the second filter main body 152 . The third end surface 156 is on the mouthpiece side, and the fourth end surface 158 is on the tobacco rod 12 side. The third end surface 156 faces or contacts the second end surface 148.

The formed paper 36 is wound around the outer periphery of the first web 144 and the second web 154 to connect the first web 144 and the second web 154.

As shown in FIGS. 5 and 6, the first to sixth lots were prepared here. The first lot is a comparative example (comparative example 1) of the third lot. The second lot is a comparative example (comparative example 2) of the third lot. The fourth lot is a comparative example (comparative example 3) of the sixth lot. The fifth lot is a comparative example (comparative example 4) of the sixth lot.

The first lot (Comparative Example 1) is a cigarette 110 having the structure of the filter 114 shown in FIGS. 2A and 2B. Here, an acetate filter is used for the first filter body 142, and a charcoal filter is used for the second filter body 152. As the first lot, a certain smoking article (here, Winston compact 6 mg manufactured by Japan Tobacco Inc. sold in Japan) is used. Therefore, the tar value of the first lot of cigarettes 110 is controlled to be around 6 mg.

The second lot (Comparative Example 2) is a cigarette 110 having the structure of the filter 114 shown in FIGS. 2A and 2B. Here, the same material as the first filter body 42 is processed and used for the first filter body 142, and the same material as the second filter body 52 is processed and used for the second filter body 152. The crimp depth of the first filter body 142 is greater than the crimp depth of the second filter body 152.

The third lot is a cigarette 10 having the structure of the filter 14 shown in FIGS. 1A to 1C. A channel portion 43 is formed on the outer periphery of the first filter body 42 . In addition, in order to adjust the tar value, the first filter body 142 and the second filter body 152 of the filter 114 of the cigarette 110 of the second lot, and the first filter body 42 and the second filter body of the filter 14 of the cigarette 10 of the third lot. The lengths L1 and L2 are different from the filter main body 52. The filter 14 of the cigarette 10 of the third lot has the channel portion 43, whereas the filter 114 of the cigarette 110 of the second lot does not have the channel portion 43.

The fourth lot (Comparative Example 3) is a cigarette 110 having the structure of the filter 114 shown in FIGS. 2A and 2B. Here, an acetate filter is used for the first filter body 142, and a charcoal filter is used for the second filter body 152. As the fourth lot, a certain smoking article (here, Winston compact 1 mg manufactured by Japan Tobacco Inc. sold in Japan) is used. Therefore, the tar value of the fourth lot of cigarettes 110 is controlled to be around 1 mg.

The fifth lot (Comparative Example 4) is a cigarette 110 having the structure of the filter 114 shown in FIGS. 2A and 2B. Here, the same material as the first filter body 42 is processed and used for the first filter body 142, and the same material as the second filter body 52 is processed and used for the second filter body 152. The crimp depth of the first filter body 142 is greater than the crimp depth of the second filter body 152.

The sixth lot is a cigarette 10 having the structure of the filter 14 shown in FIGS. 1A to 1C. A channel portion 43 is formed on the outer periphery of the first filter body 42 . In order to adjust the tar value, the first filter body 142 and the second filter body 152 of the filter 114 of the cigarette 110 of the fifth lot, and the first filter body 42 and the second filter body of the filter 14 of the cigarette 10 of the sixth lot. 52 in lengths L1 and L2. The filter 14 of the cigarette 10 of the sixth lot has the channel portion 43, whereas the filter 114 of the cigarette 110 of the fifth lot does not have the channel portion 43. The crimp depth of the first filter body 142 of the filter 114 of the fifth lot is the same as the crimp depth of the first filter body 42 of the filter 14 of the sixth lot. The crimp depth of the second filter body 152 of the filter 114 of the fifth lot is smaller than the crimp depth of the second filter body 52 of the filter 14 of the sixth lot.

FIG. 7A shows a photograph of the first end face 146 of the first filter body 142 of the second lot with an example crimp depth of 0.6 mm. FIG. 7B shows a photograph of the first end surface 146 of the first filter body 142 in an example where the crimp depth is 0.3 mm. FIG. 7C shows a photograph of the first end surface 146 of the first filter body 142 in an example where the crimp depth is 0.1 mm. As shown in FIGS. 7A to 7C, the greater the crimp depth of the sheets forming the filter bodies 42, 52, the more the area of voids can be reduced and the aesthetic appearance of the filter 114 can be improved. This also applies to the third lot of filters 14. Therefore, the greater the crimp depth of the sheets forming the filter bodies 42, 52, the more aesthetically pleasing the filter 14 can be. The total area of the voids when looking at the first end surface 46 of the first filter body 42 is preferably 3 mm ² or less.

Note that the tar value and nicotine value shown in FIGS. 5 and 6 are measured using an automatic smoker. Nicotine levels are measured by collecting particulates of mainstream smoke in an automatic smoker under specified conditions and dissolving the collected particles. Tar value is determined by subtracting the weight of nicotine and water from the weight of mainstream smoke particles.

First, the first to third lots in which the tar value was controlled to 6 mg will be described.

FIG. 8A shows a photograph of the first end surface 146 of eight cigarettes 110 of the first lot after smoking. FIG. 8B shows a photograph of the first end surface 146 of eight cigarettes 110 of the second lot after smoking. FIG. 8C shows a photograph of the first end surface 46 of eight cigarettes 10 of the third lot after smoking.

When the first lot of cigarettes 110 (see FIGS. 2A and 2B) is smoked and the tobacco material 22 of the tobacco rod 12 is burned, mainstream smoke reaches the smoker through the second filter body 152 and the first filter body 142. . Similarly, when the second lot of cigarettes 110 (see FIGS. 2A and 2B) is smoked and the tobacco material 22 of the tobacco rod 12 is burned, the mainstream smoke passes through the second filter body 152 and the first filter body 142 to the smoker. reach. At this time, the mainstream smoke reaches the smoker not only through the central axis L of the second filter body 152 and the first filter body 142 but also through the entirety thereof. Therefore, as shown in FIGS. 8A and 8B, part of the particulate matter contained in the mainstream smoke is adsorbed onto the second filter main body 152 and the first filter main body 142.

When the third lot of cigarettes 10 (see FIGS. 1A to 1C) is smoked and the tobacco material 22 of the tobacco rod 12 is burned, mainstream smoke reaches the smoker through the second filter body 52 and the first filter body 42. . At this time, the mainstream smoke reaches the first filter body 42 not only through the central axis L of the second filter body 52 but also through the entirety thereof. The first filter plug 32 has a channel portion 43 between the first filter body 42 and the first web 44 . The channel portion 43 has lower ventilation resistance than the first filter main body 42 and can take in outside air. A high proportion of the mainstream smoke passes through the channel section 43 between the first filter body 42 and the first web 44. Therefore, as shown in FIG. 8C, some of the particulate matter contained in the mainstream smoke is easily adsorbed to the second filter main body 52, but it is difficult to adsorb to the first filter main body 42 with respect to the channel part 43. . A part of the particulate matter contained in the mainstream smoke is more likely to be adsorbed by the channel portion 43 than the first filter body 42 or to be inhaled by the smoker. Note that the tar value, nicotine value, etc. are controlled by the filter 14 as a whole.

As shown in FIGS. 9 and 10, for each of the cigarettes 110, 10 from the first lot to the third lot (see FIGS. 8A to 8C), the first The tar contamination on the end surfaces 146, 46 was quantified. It is judged that the higher the value, the greater the whiteness and the less dirt. The value of the second lot was the lowest, and the whiteness meter detected that the stain was large. The numerical value of the third lot was higher than that of the first lot, and the whiteness meter detected that the third lot had less dirt.

For the first to third lots, as shown in FIG. 11, a sensory evaluation was performed on the difference in appearance between the first end surfaces 146 and 46 before and after smoking. There were 14 evaluators. The graph shown in FIG. 11 is an average value.

Here, the difference in appearance shown in FIG. 11 is a comparison with the first end surfaces 146, 46 of the cigarettes 110, 10 before smoking of each lot. Evaluation of appearance differences is as follows:
1 point: There is a considerable difference. 2 points: There is a slight difference. 3 points: There is a slight difference. 4 points: There is not much difference. 5 points: There is no difference at all. In other words, it can be evaluated that the closer the average value (AVERAGE) is to 5 points, the smaller the difference in appearance between the first end surfaces 146 and 46 of the cigarettes 110 and 10 before smoking is judged by the user. .

The evaluation score for the difference in appearance of the second lot was approximately 1 point, and the evaluators evaluated that there was a considerable difference. The evaluation score for the appearance difference between the first lot and the third lot was about 2 points, and the evaluators evaluated that there was a slight difference.

For the first to third lots, as shown in FIG. 12, a sensory evaluation was performed on the dirtiness of the first end surfaces 146, 46 before and after smoking. There were 14 evaluators. The graph shown in FIG. 12 is an average value.

Here, the dirt shown in FIG. 12 is a comparison with the first end surfaces 146, 46 of the cigarettes 110, 10 before smoking of each lot. The evaluation of dirtiness is
1 point: Quite dirty 2 points: Slightly dirty 3 points: Slightly dirty 4 points: Not very dirty 5 points: Not dirty at all. That is, it can be evaluated that the closer the average value (AVERAGE) is to 5 points, the more the user judges that the first end surfaces 146, 46 of the cigarettes 110, 10 before smoking are not dirty.

The evaluation score for the dirtiness of the second lot was approximately 1 point, and the evaluator evaluated it as being quite dirty. The evaluation score for the dirtiness of the first lot was more than 2 points, and it was evaluated as somewhat dirty. The evaluation score for the dirtiness of the third lot was between 2.5 and 3 points, and it was evaluated as less dirty than the first lot.

Next, the fourth to sixth lots in which the tar value was controlled to 1 mg will be explained.

FIG. 13A shows a photograph of the first end surface 146 of eight cigarettes 110 of the fourth lot after smoking. FIG. 13B shows a photograph of the first end surface 146 of eight cigarettes 110 of the fifth lot after smoking. FIG. 13C shows a photograph of the first end surface 46 of eight cigarettes 10 of the sixth lot after smoking.

When the fourth lot of cigarettes 110 (see FIGS. 2A and 2B) is smoked and the tobacco material 22 of the tobacco rod 12 is burned, the mainstream smoke is divided into the second filter body 152 and the first filter body, as in the first lot. 142 to reach the smoker. Similarly, when the fifth lot of cigarettes 110 (see FIGS. 2A and 2B) is smoked and the tobacco material 22 of the tobacco rod 12 is burned, the mainstream smoke is transferred to the second filter body 152 and the second filter body 152, as in the second lot. 1 reaches the smoker through the filter body 142. At this time, the mainstream smoke reaches the smoker not only through the central axis L of the second filter body 152 and the first filter body 142 but also through the entirety thereof. Therefore, as shown in FIGS. 13A and 13B, part of the particulate matter contained in the mainstream smoke is adsorbed onto the second filter main body 152 and the first filter main body 142.

When the sixth lot of cigarettes 10 (see FIGS. 1A to 1C) is smoked and the tobacco material 22 of the tobacco rod 12 is burned, the mainstream smoke is divided into the second filter body 52 and the first filter body, similar to the third lot. 42 to reach the smoker. At this time, the mainstream smoke reaches the first filter body 42 not only through the central axis L of the second filter body 52 but also through the entirety thereof. The first filter plug 32 has a channel portion 43 between the first filter body 42 and the first web 44 . Since the channel portion 43 has lower ventilation resistance than the first filter body 42, a high proportion of mainstream smoke passes through the channel portion 43 between the first filter body 42 and the first web 44. Therefore, as shown in FIG. 13C, some of the particulate matter contained in the mainstream smoke is easily adsorbed to the second filter main body 52, but is difficult to adsorb to the first filter main body 42 due to the channel portion 43. Particulate matter and the like contained in the mainstream smoke are more easily adsorbed by the channel portion 43 than by the first filter main body 42 .

As shown in FIGS. 14 and 15, for each of the cigarettes 110, 10 from the fourth lot to the sixth lot (see FIGS. 13A to 13C), the first The tar contamination on the end surfaces 146, 46 was quantified. The value of the fifth lot was the lowest, and the whiteness meter detected that the stain was large. The numerical value of the 6th lot was slightly higher than that of the 4th lot, and the whiteness meter detected that the 6th lot had less dirt. Cigarettes 110 and 10 from the 4th to 6th lots have tar values set to 1 mg, so the whiteness meters detect the cigarettes 110 and 10 from the 1st to 3rd lots with tar values set to 6 mg. This value is larger than that shown in Figures 9 and 10.

For the fourth to sixth lots, as shown in FIG. 16, a sensory evaluation was performed on the difference in appearance between the first end surfaces 146 and 46 before and after smoking. There were 14 evaluators. The graph shown in FIG. 16 is an average value.

Here, the difference in appearance shown in FIG. 16 is a comparison with the first end surfaces 146, 46 of the cigarettes 110, 10 before smoking of each lot. The evaluation score for appearance difference is the same as the evaluation score for appearance difference shown in FIG. In other words, it can be evaluated that the closer the average value (AVERAGE) is to 5 points, the smaller the difference in appearance between the first end surfaces 146 and 46 of the cigarettes 110 and 10 before smoking is judged by the user. .

The evaluation score for the difference in appearance of the fifth lot was approximately 1 point, and the evaluators evaluated that there was a considerable difference. The evaluation score for the appearance difference between the fourth lot and the sixth lot was approximately more than 2 points, and the evaluators evaluated that there was a slight difference.

For the fourth to sixth lots, as shown in FIG. 17, a sensory evaluation was performed on the dirtiness of the first end surfaces 146, 46 before and after smoking. There were 14 evaluators. The graph shown in FIG. 17 is an average value.

Here, the dirt shown in FIG. 17 is a comparison with the first end surfaces 146, 46 of the cigarettes 110, 10 before smoking of each lot. The evaluation score for dirtiness is the same as the evaluation score for dirtiness shown in FIG. That is, it can be evaluated that the closer the average value (AVERAGE) is to 5 points, the more the user judges that the first end surfaces 146, 46 of the cigarettes 110, 10 before smoking are not dirty.

The evaluation score for the dirtiness of the fifth lot was approximately 1 point, and the evaluator evaluated it as quite dirty. The evaluation score for the dirtiness of the 4th and 6th lots was approximately 2.5 points, and they were evaluated as somewhat dirty. Note that the fourth lot and the sixth lot were evaluated as less dirty than the fifth lot.

As explained above, according to this embodiment, the following can be said.

A cigarette 10 can be provided that includes a filter 14 formed of a paper sheet. At this time, the filter 14 formed of a paper sheet is made of paper, but by forming a channel portion 43 in the first filter plug 32 on the suction side of the filter 14, the end surface of the filter 14 on the suction side after smoking is 46 can be suppressed with respect to the acetate filter and the paper filter 114 that does not have a channel portion. That is, when looking at the first end surface 46 after smoking, the attachment of dirt such as particulate matter to the region of the first filter body 42 is suppressed compared to the channel portion 43. Therefore, although the filter 14 according to this embodiment is made of paper, it can improve the aesthetic appearance after smoking.

In addition, for the filter 14 formed of a paper sheet, the material of the first filter body 42 and the second filter body 52, basis weight, sheet air permeability, crimp depth, void volume, ventilation resistance, etc. are adjusted as appropriate. By doing so, the tar value etc. can be controlled. Therefore, a filter 14 is provided in which the filtration characteristics for mainstream smoke directed from the tobacco rod 12 toward the mouth end surface 46 are appropriately controlled during smoking. That is, a cigarette 10 including a filter 14 having appropriate filtration characteristics is provided.

The first filter body 42 may tend to expand radially outward with respect to the central axis L due to elastic deformation. In case the outer shape of the first filter body 42 cannot be maintained, a paper tube 43b, which is a tubular body (channel), may be disposed in the recess 43a, as shown in FIGS. 1D and 1E. In this case, the shape of the first filter body 42 made of paper, for example, can be easily maintained.

When the channel portion 43 has the paper tube 43b, part of the particulate matter contained in the mainstream smoke is contained in the paper tube 43b rather than in the concave portion 43a (the curved surface formed between the convex portions 42a) of the channel portion 43. Easy to be adsorbed. Therefore, when looking at the first end surface 46 after smoking, dirt such as particulate matter is prevented from adhering to the area of the first filter body 42 compared to the end surface of the paper tube 43b of the channel portion 43. .

In this embodiment, as shown in FIGS. 1B and 1D, an example was described in which a large number (31) of channel portions 43 are arranged between the first end surface 46 and the second end surface 48 of the first filter main body 42. . As shown in FIGS. 1C and 1E, between the convex portions 42a of the first filter body 42 that are adjacent in the circumferential direction of the longitudinal axis L, and between the recessed portions 43a of the channel portion 43 that are adjacent in the circumferential direction of the longitudinal axis L. The distances are approximately the same. The arrangement and number of channel portions 43 can be set as appropriate, such as 12 channel portions 43 being arranged at intervals of 30° with respect to the longitudinal axis L. Therefore, the distance between the convex portions 42a of the first filter body 42 adjacent in the circumferential direction of the longitudinal axis L and the distance between the recessed portions 43a of the channel portion 43 adjacent in the circumferential direction of the longitudinal axis L may be different. good.

In this embodiment, an example in which paper is used as the first filter body 42 and the second filter body 52 has been described, but the material, basis weight, sheet air permeability, crimp depth, void volume, ventilation resistance, etc. With some adjustment, it is also possible to use a nonwoven fabric.

When a nonwoven fabric is used as the first filter body 42 and the second filter body 52, the crimp tool 70 as shown in FIGS. 3A and 3B is not used. When using a nonwoven fabric, a sheet folding machine 170 (see FIG. 18A) is used instead of the crimping tool 70, which stacks and folds a plurality of sheets 172a, 172b, 172c, and 172d. As shown in FIGS. 18A and 18B, the sheet folding machine 170 uses, for example, a plurality of guides 182, 184, 186 to stack a plurality of nonwoven fabric sheets 172a, 172b, 172c, and 172d with their ends shifted and stacked. The folding process is performed by bending it into a substantially S-shape or Z-shape. The guides 182, 184, 186 are spaced apart along the moving direction of the sheets 172a, 172b, 172c, 172d. The guides 182, 184, and 186 are each shaped like a disk, for example, and are provided with opening grooves 182a, 184a, and 186a for advancing the folding process for a plurality of sheets 172a, 172b, 172c, and 172d. A plurality of sheets 172a, 172b, 172c, and 172d stacked with their ends shifted are passed through guides 182, 184, and 186, and then guided into pipe 176 in front of guide 186 by endless belt 178. By sequentially passing through the opening grooves 182a, 184a, 186a of the guides 182, 184, 186, the plurality of sheets 172a, 172b, 172c, 172d gradually approach an approximately S-shape or approximately Z-shape, and are formed within the pipe 176. Folded. After the first filter body 42 is subjected to the folding process, the shape of the first filter body 42 is maintained by the first roll paper 44 . When the second filter body 52 is folded, the shape of the second filter body 52 is maintained by the second winding paper 54 . For this reason, the first filter main body 42 and the second filter main body 52 are once formed into a rod shape of approximately 120 mm, for example, and then cut into an appropriate length.

The amount of voids when looking at the first end surface 46 of the first filter body 42 made of nonwoven fabric is smaller than the amount of voids when looking at the third end surface 56 of the second filter body 52 made of nonwoven fabric or paper. The area of the void when looking at the first end surface 46 of the first filter body 42 made of non-woven fabric is, for example, 3 ^mm2 , similar to the area of the void when looking at the first end surface 46 of the first filter body 42 made of paper. It is preferable that the value is as follows. The amount of voids when looking at the first end surface 46 of the first filter body 42 made of nonwoven fabric is preferably larger than the amount of voids in the acetate filter on the suction port side. It is preferable that the airflow resistance of the first filter body 42 made of nonwoven fabric is higher than the airflow resistance of the second filter body 52 made of nonwoven fabric or paper. Even when the first filter main body 42 of the filter 14 is made of nonwoven fabric, the aesthetic appearance can be improved as in the case where the first filter main body 42 of the filter 14 is made of paper. Furthermore, even if the first filter body 42 and the second filter body 52 are made of nonwoven fabric, they can exhibit substantially the same filter performance (filtration characteristics) as the first filter body 42 and the second filter body 52 made of paper. .

That is, according to the present embodiment, the filter 14 is formed of a paper sheet or a nonwoven fabric sheet, has improved aesthetics, and has appropriate filtration characteristics, and a cigarette (smoking article) 10 including the filter 14. is provided.

The cigarette 10 including the filter 14 according to the present embodiment can be formed entirely or mostly from natural ingredients such as paper materials and tobacco materials. Therefore, the environmental load on nature can be reduced compared to, for example, the case where acetate filters (first lot, fifth lot) are used.

(Modified example)
A modification of the filter 14 of the cigarette 10 will be described using FIGS. 19A and 19B.

As shown in FIGS. 19A and 19B, the first filter plug 32 has a channel portion 43 on the central axis L. As shown in FIGS. The channel portion 43 is formed into a cylindrical shape. The channel portion 43 penetrates between the first end surface 46 and the second end surface 48 of the first filter body 42 .

Since the first filter main body 42 is made of paper, it may expand toward the central axis L due to elastic deformation, thereby attempting to make the channel portion 43 smaller. In preparation for the case where the channel portion 43 cannot be maintained, a paper tube 43c, which is a tubular body (channel), may be provided in the channel portion 43, as shown in FIG. 19B. In this case, the shape of the first filter body 42 made of paper, for example, can be easily maintained.

Therefore, the channel portion 43 of the filter 14 is not limited to between the outer circumference of the first filter main body 42 and the inner circumferential surface of the first roll (cylindrical portion) 44, as shown in FIGS. 1A to 1C.

The number of paper tubes 43c of the channel portion 43 may be one or more so as to penetrate between the first end surface 46 and the second end surface 48 of the first filter main body 42. In this case, one of the paper tubes 43c may or may not be on the central axis L of the first filter main body 42.

When the cigarette 10 (see FIG. 19A) is smoked and the tobacco material 22 of the tobacco rod 12 is combusted, mainstream smoke reaches the smoker through the second filter body 52 and the first filter body 42. At this time, the mainstream smoke reaches the first filter body 42 not only through the central axis L of the second filter body 52 but also through the entirety thereof. The first filter plug 32 has a channel portion 43 on the central axis L of the first filter body 42 . The channel portion 43 has lower ventilation resistance than the first filter main body 42 . A high proportion of mainstream smoke passes through the channel portion 43. Therefore, some of the particulate matter contained in the mainstream smoke is easily adsorbed to the second filter main body 52, but is difficult to adsorb to the first filter main body 42 relative to the channel portion 43. A part of the particulate matter contained in the mainstream smoke is more likely to be adsorbed by the channel portion 43 than the first filter body 42 or to be inhaled by the smoker. Note that the tar value, nicotine value, etc. are controlled by the filter 14 as a whole.

When the channel portion 43 has the paper tube 43c, part of the particulate matter contained in the mainstream smoke is transferred to the paper tube 43c rather than to the inner circumferential surface of the channel portion 43 (the passage formed by the first filter body 42 itself). It is easily absorbed inside. When the paper tube 43c is not provided in the channel portion 43, particulate matter and the like contained in the mainstream smoke are adsorbed on the inner circumferential surface of the channel portion 43 (the passage formed by the first filter body 42 itself).

Also in this case, when looking at the first end surface 46 after smoking, compared to the channel section 43 (the end surface of the paper tube 43c), the area between the channel section 43 and the first filter body 42 has dirt such as particulate matter. adhesion is suppressed.

According to the modification of the first embodiment, the following can be said.

A cigarette 10 can be provided that includes a filter 14 formed of a paper sheet. At this time, the filter 14 formed of a paper sheet is made of paper, but by forming a channel portion 43 in the first filter plug 32 on the suction side of the filter 14, the end surface of the filter 14 on the suction side after smoking is 46 can be suppressed with respect to the acetate filter and the paper filter 114 that does not have a channel portion. Therefore, although the filter 14 according to the modification of the first embodiment is made of paper, it can improve the aesthetic appearance after smoking.

In addition, for the filter 14 formed of a paper sheet, the material of the first filter body 42 and the second filter body 52, basis weight, sheet air permeability, crimp depth, void volume, ventilation resistance, etc. are adjusted as appropriate. By doing so, the tar value etc. can be controlled. Therefore, a filter 14 is provided in which the filtration characteristics for mainstream smoke directed from the tobacco rod 12 toward the mouth end surface 46 are appropriately controlled during smoking. That is, a cigarette 10 including a filter 14 having appropriate filtration characteristics is provided.

In the modification of the first embodiment, an example in which paper is used as the first filter main body 42 and the second filter main body 52 has been described. It is also possible to use a non-woven fabric by adjusting the parameters as appropriate.

That is, according to the modification of the first embodiment, the filter 14 is formed of a paper sheet or a nonwoven fabric sheet, has improved aesthetics, and has appropriate filtration characteristics, and a cigarette including the filter 14 ( smoking article) 10 are provided.

The cigarette 10 including the filter 14 according to the modification of the first embodiment can be formed entirely or mostly from naturally derived components such as paper materials and tobacco materials. Therefore, the environmental load on nature can be reduced compared to, for example, the case where acetate filters (first lot, fifth lot) are used.

[Second embodiment]
A second embodiment will be described using FIG. 20. This embodiment is a modification of the first embodiment.

The flavor suction article 210 is one of the members constituting the non-combustion heating type flavor suction article.

The flavor suction article 210 shown in FIG. 20 is a replaceable cartridge for use with a heater. The flavor suction article 210 has a columnar shape extending in one direction.

As shown in FIG. 20, the flavor suction article 210 includes a base member 212 forming one end thereof, a filter 214 forming an end opposite to the base member 212, and a base member 212. It has a paper tube part 216 between it and the filter 214. The base portion 212, the paper tube portion 216, and the filter 214 are connected by a wrapping paper 218. The paper tube section 216 is a paper tube formed by winding paper into a cylindrical shape, and is hollow inside.

The base portion 212 includes a filler 222 and a first paper roll 224 around which the filler 222 is wound.

Filler 222 includes, for example, tobacco material and an aerosol source.

The aerosol source is heated to a predetermined temperature and generates an aerosol along with a substance such as a flavoring material derived from the flavor source of the filler 222 . Aerosol sources can include, for example, glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof. The content of the aerosol source in the filling 222 is not particularly limited, and from the viewpoint of generating a sufficient amount of aerosol and imparting good flavor, it is usually 5% by mass or more, preferably 10% by mass or more. It is usually 50% by mass or less, preferably 25% by mass or less.

Filling 222 includes tobacco material as a flavor source. The tobacco material is, for example, shredded tobacco. The content of the filler 222 in the flavor suction article 210 is, for example, 200 to 400 mg, preferably 250 to 320 mg, when the base portion 212 has a circumference of 22 mm and a length of 20 mm. The water content of the filler 222 is, for example, 8 to 18% by mass, preferably 10 to 16% by mass. With such a moisture content, it is possible to suppress the occurrence of winding stains and to improve the winding suitability during manufacture of the base material portion 212.

The filter 214 includes a first filter plug 232, a second filter plug 234, and a molded paper 236 that covers these and connects them. The length of the first filter plug 232 along the longitudinal axis L is L1, and the length of the second filter plug 234 along the longitudinal axis L is L2. The second filter plug 234 is arranged between the paper tube section 216 and the first filter plug 232.

The first filter plug 232 includes a first filter body (filter element, filter medium) 242 and a first plug winding paper (cylindrical portion) 244 around which the first filter body 242 is wound. The length L1 of the first filter plug 232 is the same as the length of the first filter body 242. A channel portion 43 is formed between the outer periphery of the first filter body 242 and the first paper roll 244 . The channel portion 43 is located inside the first paper roll (cylindrical portion) 244 and provides ventilation between the second end surface 248 and the first end surface 246. The channel portion 43 is formed in the same manner as shown in FIGS. 1A to 1C, for example. The channel portion 43 may include a paper tube 43b (see FIGS. 1D and 1E) that is a tubular body.

The first filter main body 242 has a first end surface 246 on the suction side (suction side end surface) and a second end surface 248 (end surface on the base member 212 side) on the side opposite to the suction side. The outer shapes of the first end surface 246 and the second end surface 248 are, for example, approximately circular. A longitudinal axis (center axis) L that intersects the first end surface 246 and the second end surface 248 is defined in the first filter main body 242 . The first end surface 246 is on the suction port side, and the second end surface 248 is on the base material part 212 side. The first end surface 246 is exposed to the outside.

The second filter plug 234 includes a second filter body (filter element, filter medium) 252 and a second paper wrapper (cylindrical portion) 254 that wraps around the outer circumference of the second filter body 252 . The length L2 of the second filter plug 234 is the same as the length of the second filter body 252. The second filter body 252 has a third end surface 256 and a fourth end surface 258. The outer shapes of the third end surface 256 and the fourth end surface 258 are, for example, approximately circular. A longitudinal axis (center axis) L that intersects the third end surface 256 and the fourth end surface 258 is defined in the second filter main body 252 . The third end surface 256 is on the suction port side, and the fourth end surface 258 is on the base material part 212 side. The third end surface 256 faces or contacts the second end surface 248.

The formed paper 236 is wound around the outer periphery of the first web 244 and the second web 254 to connect the first web 244 and the second web 254.

The wrapping paper 218 is wound around the outer periphery of the base member 212, the paper tube portion 216, and the filter 214 so as to connect the base member 212 and the filter 214 via the paper tube portion 216.

The first filter main body 242 and the second filter main body 252 are formed of paper sheets or nonwoven fabric sheets. The relationship between the first filter body 242 and the second filter body 252 is the same as the relationship between the first filter body 42 and the second filter body 52 described in the first embodiment.

For this reason, it is preferable that the sheet of the first filter body 242 is crimped to be larger than the sheet of the second filter body 252. The ventilation resistance of the first filter body 242 is preferably higher than the ventilation resistance of the second filter body 252. The airflow resistance of the first filter body 242 may be lower than the airflow resistance of the second filter body 252. The ventilation resistance of the first filter body 242 is, for example, 0 mmH ₂ O/mm to 12 mmH ₂ O/mm, and the ventilation resistance of the second filter body 252 is, for example, 0 mmH ₂ O/mm to 12 mmH ₂ O/mm. is suitable.

The air permeability of the sheet of the first filter body 242 is 1000 CU (Coresta unit) to 30000 CU after the crimping process, and the air permeability of the sheet of the second filter body 252 is 0 CU to 10000 CU after the crimping process. It is preferable that

The amount of voids when looking at the end face 246 on the suction side of the first filter body 242 is the same as or larger than the amount of voids in the acetate filter at the suction port. The area of the void when looking at the end face 246 on the suction side of the first filter body 242 is preferably 3 mm ² or less.

In this way, like the filter 14 described in the first embodiment, the filter 214 has an aesthetic appearance and is a flavor source of the filling 222 extending from the filling 222 of the base portion 212 toward the mouth end surface 246. It is formed to have appropriate filtration characteristics for aerosols containing substances such as flavor substances.

As explained above, according to this embodiment, the following can be said.

A flavor absorbing article 210 can be provided that includes a filter 214 formed from a sheet of paper. At this time, the filter 214 formed of a paper sheet is made of paper, but by forming the channel portion 43 in the first filter plug 232 on the suction side of the filter 214, the end surface of the filter 214 on the suction side after use is 246 stains can be suppressed for acetate filters and paper filters 114 that do not have channel portions. Therefore, although the filter 214 according to this embodiment is made of paper, it can improve the aesthetic appearance after use.

In addition, for the filter 214 formed of a paper sheet, the material of the first filter body 242 and the second filter body 252, basis weight, sheet air permeability, crimp depth, void volume, ventilation resistance, etc. are adjusted as appropriate. This allows you to control the smoking taste (sweetness, smoke feel, stimulation, tobacco feel (smoking response), etc.). Therefore, during use (inhalation), the filter 214 is provided with appropriately controlled filtration characteristics for substances such as flavor substances and aerosols originating from the flavor source, which travel from the tobacco rod 12 toward the mouth end surface 246. That is, a flavor suction article 210 is provided that includes a filter 214 having appropriate filtration characteristics .

In this embodiment, an example in which paper is used as the first filter body 242 and the second filter body 252 has been described, but the material, basis weight, sheet air permeability, crimp depth, void volume, ventilation resistance, etc. By making adjustments, it is also possible to use the nonwoven fabric sheets 172a, 172b, 172c, and 172d (see FIG. 18A) described in the first embodiment. That is, according to the present embodiment, there is provided a filter 214 that is formed of a paper sheet or a nonwoven fabric sheet, has improved aesthetics, and has appropriate filtration characteristics, and a flavor suction article 210 that includes the filter 214. be done.

Although not shown, in order to appropriately adjust the ventilation resistance of the flavor suction article 210, the filter 214 may be provided with an opening to take in air from the outside. In this case, it is desirable to provide the paper tube section 216 with an opening.

The longitudinal dimension, ie, the length, of the flavor suction article 210 is preferably 40 to 90 mm, more preferably 50 to 75 mm, and even more preferably 50 to 60 mm. The circumferential length of the flavor suction article 210 is preferably 15 to 25 mm, more preferably 17 to 24 mm, and even more preferably 20 to 23 mm. In addition, in the flavor suction article 210, the length of the base portion 212 is 20 mm, the length of the paper tube portion 216 is 20 mm, the length of the first filter plug 232 is 7 mm, and the length of the second filter plug 234 is 8 mm. However, the lengths of these individual segments can be changed as appropriate depending on manufacturing suitability, required quality, etc.

There are no particular restrictions on the size of the shredded tobacco used in the filler 222 or the method for preparing it. For example, dried tobacco leaves chopped to a width of 0.8 to 1.2 mm may be used. Alternatively, dried tobacco leaves may be crushed and homogenized to an average particle size of about 20 to 200 μm, processed into sheets, and then chopped into 0.8 to 1.2 mm widths. . Furthermore, the above-mentioned sheet-processed product may be gathered without being chopped and used as a tobacco material.

As the first roll paper 244 and the second roll paper 254, the same roll papers 44, 54 and tip paper 16 used in the cigarette 10 described in the first embodiment can be used, respectively.

The flavor suction article 210 including the filter 214 according to the present embodiment can be formed entirely or mostly from natural ingredients, such as paper materials and tobacco materials. Therefore, compared to the case where, for example, an acetate filter is used as the filter, the environmental load on nature can be reduced.

Note that, as described in the modification of the first embodiment (see FIGS. 19A and 19B), the channel portion 43 may be formed to penetrate the first filter main body 242.

[Third embodiment]
A third embodiment will be described using FIG. 21. This embodiment is a modification of the first and second embodiments.

The flavor suction article 310 is one of the members constituting the non-combustion heating type flavor suction article.

The flavor suction article (capsule) 310 shown in FIG. 21 is a replaceable cartridge for use with a heater. The flavor suction article 310 has a columnar shape extending in one direction.

As shown in FIG. 21, the flavor suction article 310 includes a capsule body (cylindrical part) 311, a tobacco material 312 sealed in the capsule body 311, a filter 314 for preventing the tobacco material 312 from leaking out, and a capsule body 311. It has a ring-shaped cap (end piece) 316 that supports the filter 314 with respect to the main body 311.

The capsule body 311 has an opening 322 at one end (mouthpiece side) and a mesh portion 324 at the other end (tobacco material 312 side). The capsule body 311 has a step 326 on which the filter 314 is placed. The mesh portion 324 of the capsule body 311 allows, for example, air and appropriate steam to pass through, but the mesh size is adjusted to prevent the tobacco material 312 from leaking out.

The capsule body 311 and the cap 316 are made of an appropriate material such as paper or nonwoven fabric. The capsule body 311 and the cap 316 may be made of resin material. When the capsule body 311 and the cap 316 are made of a resin material, it is preferable that all or part of the material is recyclable.

As the tobacco material 312, in addition to shredded tobacco, granular materials are used.

The filter 314 is capable of passing air and appropriate steam, and is formed in a substantially cylindrical shape. Filter 314 has a first filter body 342 and a second filter body 352. Let L1 be the length of the first filter main body 342 along the longitudinal axis L, and let L2 be the length of the second filter main body 352 along the longitudinal axis L. A channel portion 43 is formed between the outer periphery of the first filter body 342 and the capsule body (cylindrical portion) 311. The first filter body 342 and the second filter body 352 are held by the capsule body 311. When the cap (end piece) 316 is placed with respect to the capsule body 311, the cap 316 supports the first filter body 342 and the second filter body 352, and the first filter body 342 and the second filter body 352 are attached to the capsule. Preventing it from coming off from the main body 311.

The first filter main body 342 is formed of an appropriate paper material or nonwoven fabric, and is made of a suitable material and basis weight, similar to the first filter main body 42 described in the first embodiment and the first filter main body 242 described in the second embodiment. , sheet air permeability, crimp depth, void volume, ventilation resistance, etc. are adjusted as appropriate. The second filter main body 352 is formed of an appropriate paper material or nonwoven fabric, and is made of an appropriate paper material or nonwoven fabric, like the second filter main body 52 described in the first embodiment and the second filter main body 252 described in the second embodiment. , sheet air permeability, crimp depth, void volume, ventilation resistance, etc. are adjusted as appropriate.

The first filter main body 342 has a first end face (end face on the mouthpiece side) 346 on the mouthpiece side and a second end face (end face on the tobacco material 312 side) 348 on the side opposite to the mouthpiece side. The second filter body 352 has a first end surface 356 and a second end surface 358. The second end surface 348 and the first end surface 356 face each other or are in contact with each other. The first end surface 346 is exposed to the outside. Note that the channel portion 43 is located inside the capsule body (cylindrical portion) 311 and provides ventilation between the second end surface 348 and the first end surface 346. The channel portion 43 is formed in the same manner as shown in FIGS. 1A to 1C, for example. The channel portion 43 may include a paper tube 43b (see FIGS. 1D and 1E) that is a tubular body.

The sheet of the first filter body 342 is crimped to a larger extent than the sheet of the second filter body 352. The ventilation resistance of the first filter body 342 is preferably higher than the ventilation resistance of the second filter body 352. The airflow resistance of the first filter body 342 may be lower than the airflow resistance of the second filter body 352. It is preferable that the ventilation resistance of the first filter body 342 is, for example, 0 mmH ₂ O/mm to 12 mmH ₂ O/mm. The ventilation resistance of the second filter main body 352 is preferably 0 mmH ₂ O/mm to 12 mmH ₂ O/mm, for example.

It is preferable that the air permeability of the sheet of the first filter body 342 is, for example, 1000 CU (Coresta unit) to 30000 CU after the crimping process. It is preferable that the air permeability of the sheet of the second filter body 352 is, for example, 0 CU to 10,000 CU after the crimping process.

The amount of voids when looking at the first end surface 346 of the first filter body 342 is the same as or larger than the amount of voids in the acetate filter at the suction port. The area of the void when looking at the first end surface 346 of the first filter body 342 is preferably 3 mm ² or less.

In this way, the filter 314 has good aesthetics, as well as the filter 14 described in the first embodiment and the filter 214 described in the second embodiment, and has a flavor source that extends from the tobacco material 312 toward the mouth end surface 46. The filter is formed to have appropriate filtration characteristics for substances such as flavor substances and aerosols derived from.

As explained above, according to this embodiment, the following can be said.

A flavor absorbing article 310 can be provided that includes a filter 314 formed from a sheet of paper. At this time, the filter 314 formed of a paper sheet is made of paper, but by forming the channel part 43 in the first filter body 342 on the suction side of the filter 314, the end surface of the filter 314 on the suction side after use is 346 can be suppressed for an acetate filter and a paper filter 114 without a channel portion. Therefore, although the filter 314 according to this embodiment is made of paper, it can improve the aesthetic appearance after use.

In addition, for the filter 314 formed of a paper sheet, the material of the first filter body 342 and the second filter body 352, basis weight, sheet air permeability, crimp depth, void volume, ventilation resistance, etc. are adjusted as appropriate. This allows you to control the smoking taste (sweetness, smoke feel, stimulation, tobacco feel (smoking response), etc.). For this reason, a filter 314 is provided in which the filtration characteristics of substances such as flavor substances and aerosol originating from flavor sources, which travel from the tobacco material 312 toward the mouth end surface 346 during suction, are appropriately controlled. That is, a flavor suction article 310 is provided that includes a filter 314 having appropriate filtration characteristics .

In this embodiment, an example in which paper is used as the first filter body 342 and the second filter body 352 has been described, but the sheet material, basis weight, air permeability, crimp depth, void volume, ventilation resistance, etc. By making adjustments, it is also possible to use the nonwoven fabric sheets 172a, 172b, 172c, and 172d (see FIG. 18A) described in the first embodiment. That is, according to the present embodiment, a flavor suction article 310 including the filter 314 and the filter 314 is provided, which is formed of a paper sheet or a nonwoven fabric sheet, has improved aesthetics, and has appropriate filtration characteristics. be done.

Note that, as described in the modification of the first embodiment (see FIGS. 19A and 19B), the channel portion 43 may be formed to penetrate the first filter main body 342.

Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention at the implementation stage. Moreover, each embodiment may be implemented by appropriately combining them as much as possible, and in that case, the combined effects can be obtained. Further, the embodiments described above include inventions at various stages, and various inventions can be extracted by appropriately combining the plurality of disclosed constituent elements.
The scope of claims as filed is appended below.
[1]
a first filter body having a first end surface on the suction port side and a second end surface on the opposite side to the suction port side, and formed of a paper sheet or a nonwoven fabric sheet;
a second filter body that is located on the second end face side of the first filter body, has a third end face that faces the second end face, and is formed of a paper sheet or a nonwoven fabric sheet;
a channel portion that ventilates between the second end surface and the first end surface;
has
The airflow resistance of the channel portion is lower than the airflow resistance of the first filter body.
[2]
The filter according to appendix [1], wherein when looking at the first end surface of the first filter body, the amount of voids in the first filter body is smaller than the amount of voids in the channel portion.
[3]
a first paper roll wound around the outer periphery of the first filter body;
The filter according to appendix [1] or [2], wherein the channel portion is located between the outer circumferential surface of the first filter body and the inner circumferential surface of the first web.
[4]
The filter according to appendix [3], wherein the channel portion has a tubular body made of paper or a tubular body made of nonwoven fabric.
[5]
The filter according to attachment [1] or attachment [2], wherein the channel portion has a cylindrical shape that penetrates between the second end surface and the first end surface of the first filter main body.
[6]
The filter according to appendix [5], wherein the channel portion has a tubular body made of paper or a tubular body made of nonwoven fabric.
[7]
The filter according to any one of appendices [1] to [6], wherein the first end surface is exposed to the outside.
[8]
The paper sheet of the first filter body is crimped to a greater crimp depth than the paper sheet of the second filter body, according to any one of appendices [1] to [7]. filter.
[9]
The filter according to any one of appendices [1] to [7], wherein the first filter body and the second filter body are each made of a plurality of nonwoven fabric sheets that are stacked and subjected to a folding process.
[10]
The filter according to any one of appendices [1] to [9], wherein the air permeability of the sheets of the first filter body and the second filter body is 1000 CU (Coresta unit) to 30000 CU.
[11]
The filter according to any one of appendices [1] to [10], wherein the first filter body and the second filter body have airflow resistances of 0 mmH ₂ O/mm to 12 mmH ₂ O/mm.
[12]
A smoking article comprising the filter according to any one of Supplementary notes [1] to Supplementary notes [11].
[13]
A flavor suction article comprising the filter according to any one of Supplementary notes [1] to Supplementary notes [11].

Claims (13)

a first filter body having a first end surface on the suction port side and a second end surface on the opposite side to the suction port side, and formed of a paper sheet or a nonwoven fabric sheet;
a second filter body that is located on the second end face side of the first filter body, has a third end face that faces the second end face, and is formed of a paper sheet or a nonwoven fabric sheet;
a channel portion that ventilates between the second end surface and the first end surface;
The airflow resistance of the channel portion is lower than the airflow resistance of the first filter body,
The paper sheet of the first filter body is crimped to a greater crimp depth than the paper sheet of the second filter body.
filter. a first filter body having a first end surface on the suction port side and a second end surface on the opposite side to the suction port side, and formed of a paper sheet or a nonwoven fabric sheet;
a second filter body that is located on the second end face side of the first filter body, has a third end face that faces the second end face, and is formed of a paper sheet or a nonwoven fabric sheet;
a channel portion that ventilates between the second end surface and the first end surface;
has
The airflow resistance of the channel portion is lower than the airflow resistance of the first filter body,
The ventilation resistance of the first filter body is higher than the ventilation resistance of the second filter body.
filter. The filter according to claim 1 or 2 , wherein when looking at the first end surface of the first filter body, the amount of voids in the first filter body is smaller than the amount of voids in the channel portion. a first paper roll wound around the outer periphery of the first filter body;
The filter according to any one of claims 1 to 3 , wherein the channel portion is located between an outer circumferential surface of the first filter body and an inner circumferential surface of the first web. The filter according to claim 4 , wherein the channel portion has a tubular body made of paper or a tubular body made of nonwoven fabric. The filter according to any one of claims 1 to 3 , wherein the channel portion has a cylindrical shape passing between the second end surface and the first end surface of the first filter main body. The filter according to claim 6 , wherein the channel portion has a tubular body made of paper or a tubular body made of nonwoven fabric. The filter according to any one of claims 1 to 7 , wherein the first end surface is exposed to the outside. The filter according to any one of claims 1 to 8 , wherein the first filter body and the second filter body are each formed by stacking a plurality of nonwoven fabric sheets and subjecting them to a folding process. The filter according to any one of claims 1 to 9, wherein the air permeability of the sheets of the first filter main body and the second filter main body is 1000 CU (Coresta unit) to 30000 CU. The filter according to any one of claims 1 to 10, wherein the first filter body and the second filter body have ventilation resistances of 0 mmH ₂ O/mm to 12 mmH ₂ O/mm. A smoking article comprising a filter according to any one of claims 1 to 11. A flavor suction article comprising the filter according to any one of claims 1 to 11.

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