TWI478672B - Smoking article and filter - Google Patents

Description

Smoking items and filters

The present invention relates to a smoking article and a filter having a filter portion.

For example, it is disclosed that in a filter tip for tobacco, the end portion of the suction port of the cylindrical filter head is obliquely cut. In the filter head for tobacco, the smoke flows out at a right angle to the inclined surface at the time of smoking, and the smoking taste is improved (for example, refer to Patent Document 1).

[Previous Technical Literature] (Patent Literature)

Patent Document 1: Japanese Laid-Open Patent Publication No. 59-102386

However, in the above-mentioned conventional filter head for tobacco, it is necessary to have a step of cutting the end portion of the suction head side obliquely at the end of the manufacturing step, so that it is necessary to have a special processing device and the like. The problem of poor efficiency.

One aspect of the smoking article of the present invention is: tobacco a filter portion having a suction port; a cylindrical covering portion covering the tobacco portion and the filter portion; and a plurality of opening portions provided in the covering portion in the vicinity of the suction port.

A smoking article according to another aspect of the present invention includes: a tobacco portion; a filter portion having a suction port; a cylindrical covering portion covering the tobacco portion and the filter portion; and an exposed portion disposed adjacent to the suction port In the aforementioned cover.

A filter according to an aspect of the present invention includes: a tubular portion that is attached to one end of the smoking article; a filter portion that has a suction port and is disposed inside the tubular portion; and a plurality of openings The tube portion is disposed in the vicinity of the suction port.

A smoking article according to an aspect of the present invention includes: a tobacco portion; a filter portion having a suction port; a cylindrical covering portion covering the tobacco portion and the filter portion; and a plurality of opening portions, which are attached to the foregoing The suction port is provided in the vicinity of the cover portion, and is provided to form a predetermined angle with respect to the axis of the filter portion.

A filter according to an aspect of the present invention includes: a tubular portion that is attached to one end of the smoking article; a filter portion that has a suction port and is disposed inside the tubular portion; and a plurality of openings The cylindrical portion is provided in the vicinity of the suction port, and is provided to form a predetermined angle with respect to the axis of the filter portion.

A smoking article according to an aspect of the present invention includes: a tobacco portion; a filter portion having a suction port; a cylindrical covering portion covering the tobacco portion and the filter portion; and a plurality of opening portions attached to the suction port Provided in the cover portion; the air introduction portion is provided at a position offset from the vicinity of the suction port, and is provided in the cover portion; and the mixing portion is provided in the filter portion, and the smoke from the tobacco portion is derived from The air in the air introduction portion is mixed.

11‧‧‧ Cigarettes

12‧‧ ‧Tobacco Department

13‧‧‧Filter body

14‧‧‧ Winding paper

15‧‧‧Filter Department

16‧‧‧Pin paper

17‧‧‧ Openings

17A‧‧‧Part 1

17B‧‧‧Part 2

18‧‧‧Ventinel

19‧‧‧Air introduction

20‧‧‧Mixed Department

21‧‧‧Inhalation

22‧‧‧ mouthpiece

22A‧‧‧ end face

51‧‧‧Exposed Department

52‧‧‧ Coverage

53‧‧‧Smoking articles

61‧‧‧Dedicated to the Ministry of Resistance

81‧‧‧Filter

82‧‧‧ Tube

A‧‧‧Axis direction

Fig. 1 is a side view showing a cigarette of an example of a smoking article according to the first embodiment.

Fig. 2 is a perspective view showing a part of the cigarette shown in Fig. 1 cut off and a part thereof is exploded.

Fig. 3 is a schematic view showing a measuring device for evaluating the smoke diffusion effect of the cigarette shown in Fig. 1.

Fig. 4 is a table showing the evaluation results of Comparative Example 101 and Examples 101 to 123 of the first embodiment.

Fig. 5 is a view produced based on the table shown in Fig. 4.

Fig. 6 is a view showing the diffusion state of the smoke of Comparative Example 101 of the table shown in Fig. 4.

Fig. 7 is a view showing the diffusion state of the smoke of Example 101 of the table shown in Fig. 4.

Fig. 8 is a view showing the diffusion state of the smoke of Example 117 of the table shown in Fig. 4.

Figure 9 is a graph showing the value of F of a representative embodiment of a cigarette having a ventilation on the X-axis and taking the value of F of a representative example of a cigarette having a ventilated Y-axis.

Fig. 10 is a cross-sectional view showing a first modification of the cigarette according to an example of the smoking article of the first embodiment.

Fig. 11 is a cross-sectional view showing a second modification of the cigarette of an example of the smoking article of the first embodiment.

Fig. 12 is a side view showing a cigarette of an example of the smoking article of the second embodiment.

Fig. 13 is a side view showing a cigarette of an example of the smoking article of the third embodiment.

Fig. 14 is a side view showing a part of the smoking article of an example of the smoking article of the fourth embodiment.

Fig. 15 is a side view showing a part of the filter cut off in an embodiment in which a filter to be used for smoking articles is cut.

Fig. 16 is a side view showing a part of the cigarette of an example of the smoking article of the fifth embodiment cut off.

Fig. 17 is a perspective view showing a part of the cigarette shown in Fig. 16 cut off and a part is exploded.

Fig. 18 is a table showing Comparative Example 201 and Examples 201 to 213 of the cigarette shown in Fig. 16.

Fig. 19 is a view showing the diffusion state of the smoke of Comparative Example 201 in the table shown in Fig. 18.

Fig. 20 is a view showing the result of image analysis of the smoke of Comparative Example 201 in the table shown in Fig. 18.

Fig. 21 is a view showing the diffusion state of the smoke of Example 201 of the table shown in Fig. 18.

Fig. 22 is a view showing the result of image analysis of the tobacco of Example 201 of the table shown in Fig. 18.

Fig. 23 is a view showing the diffusion state of the smoke of Example 202 of the table shown in Fig. 18.

Fig. 24 is a view showing the result of image analysis of the tobacco of Example 202 of the table shown in Fig. 18.

Fig. 25 is a view showing the diffusion state of the smoke of Example 203 of the table shown in Fig. 18.

Fig. 26 is a view showing the result of image analysis of the smoke of Example 203 of the table shown in Fig. 18.

Fig. 27 is a view showing the diffusion state of the smoke of Example 204 of the table shown in Fig. 18.

Fig. 28 is a view showing the result of image analysis of the smoke of Example 204 of the table shown in Fig. 18.

Fig. 29 is a view showing the diffusion state of the smoke of Example 205 of the table shown in Fig. 18.

Fig. 30 is a view showing the result of image analysis of the smoke of Example 205 of the table shown in Fig. 18.

Fig. 31 is a view showing the diffusion state of the smoke of Example 206 of the table shown in Fig. 18.

Fig. 32 is a view showing the result of image analysis of the tobacco of Example 206 of the table shown in Fig. 18.

Fig. 33 is a view showing the diffusion state of the smoke of Example 207 of the table shown in Fig. 18.

Fig. 34 is a view showing the result of image analysis of the smoke of Example 207 of the table shown in Fig. 18.

Fig. 35 is a view showing the diffusion state of the smoke of Example 208 of the table shown in Fig. 18.

Fig. 36 is a view showing the diffusion state of the smoke of Example 209 of the table shown in Fig. 18.

Fig. 37 is a view showing the diffusion state of the smoke of the embodiment 210 of the table shown in Fig. 18.

Fig. 38 is a view showing the diffusion state of the smoke of Example 211 of the table shown in Fig. 18.

Fig. 39 is a view showing the diffusion state of the smoke of Example 212 of the table shown in Fig. 18.

Fig. 40 is a view showing the diffusion state of the smoke of Example 213 of the table shown in Fig. 18.

Fig. 41 is a view showing the results of evaluation of smoking taste of Examples 201 to 207 shown in Fig. 18.

Fig. 42 is a table showing the detailed numerical values of the graph shown in Fig. 41.

Fig. 43 is a side view showing the smoking article of an example of the smoking article of the sixth embodiment cut off.

Fig. 44 is a side view showing a part of the filter cut in the embodiment in which the filter is attached to the smoking article.

Fig. 45 is a table showing cigarettes of an example of smoking articles of Examples 301 to 309 of the seventh embodiment, Examples 310 to 314 of the eighth embodiment, and Comparative Examples 301 to 305.

Fig. 46 is a table showing cigarettes of an example of smoking articles of Examples 315, 317, 319, 321, 338, 339, Example 336 of the eighth embodiment, and Comparative Examples 306 and 308 of the seventh embodiment.

Fig. 47 is a cross-sectional view showing a part of the cigarette of Example 301 of the seventh embodiment.

Fig. 48 is a perspective view showing a part of the cigarette of Example 301 of the seventh embodiment.

Fig. 49 is a cross-sectional view showing a part of the cigarette of Example 305 of the seventh embodiment.

Fig. 50 is a cross-sectional view showing a part of the cigarette of Example 306 of the seventh embodiment.

Figure 51 is a cross-sectional view showing a part of the cigarette of Example 310 of the eighth embodiment.

Figure 52 is a cross-sectional view showing a part of the cigarette of Example 312 of the eighth embodiment.

Figure 53 is a cross-sectional view showing a part of the cigarette of Example 313 of the eighth embodiment.

Fig. 54 is a cross-sectional view showing a part of the cigarette of Example 314 of the eighth embodiment.

Fig. 55 is a cross-sectional view showing a part of the cigarette of Comparative Example 301.

Figure 56 is a cross-sectional view showing a portion of the cigarette of Comparative Example 302.

Fig. 57 is a schematic view showing the first measuring device.

Fig. 58 is a schematic view showing the second measuring device.

Fig. 59 is a view showing the ventilation width of a cigarette having a vent hole of 4 lines.

Fig. 60 is a view showing the ventilation width of a cigarette having a vent hole of one line.

Fig. 61 is a graph showing the relationship between the length of the mixing portion and the aeration rate in each of the examples.

Fig. 62 is a view showing the relationship between the resistance imparting portion and the ventilation rate in each of the examples.

Fig. 63 is a graph showing the relationship between the ventilation rate and R in each of the examples.

Fig. 64 is a view showing the relationship between the length of the mixing portion in the axial direction of each embodiment and R when the vent holes are four rows.

Fig. 65 is a view showing the relationship between the length of the mixing portion in the axial direction of each embodiment and R when the vent holes are one line.

Fig. 66 is a view showing the relationship between L and R of each embodiment.

Fig. 67 is an enlarged view showing the position of L in Fig. 66 from 0 mm to 2 mm.

Fig. 68 is a graph showing the relationship between the ventilation rate and R in each of the examples.

Fig. 69 is a graph showing the relationship between the ventilation rate and R in each of the examples.

Fig. 70 is a view showing the relationship between L and R of each embodiment for each vent hole.

(First embodiment of smoking article)

Hereinafter, a first embodiment of a cigarette of an example of a smoking article will be described with reference to Figs. 1 and 2 . In addition, among smoking articles, smoking articles including cigarettes, cigars, cigarillos, tobacco-scented aromas such as electronic device heating or heat sources, and smoking articles that attract tobacco aromas in a non-heating type (trade name: zero-degree fashion mint) (ZERO STYLE MINT)) and so on.

As shown in the figure, the cigarette 11 is provided with a cylindrical tobacco portion 12 formed by surrounding a tobacco (tobacco) around a cigarette paper, and a cylindrical filter portion 15 including a filter body 13 and a covering filter body. a wrapping paper 14 around 13; a tip paper (also referred to as an outer paper) 16 spanning over the tobacco portion 12 and the filter portion 15; and an opening portion 17 for running through the winding paper 14 and the water pine Set in the manner of paper 16. In the present embodiment, the tipping paper 16 is an example of a cylindrical covering portion that covers the tobacco portion 12 and the filter portion 15. Further, the cigarette 11 may be provided with a vent hole 18 (ventilation hole) which is provided in a ring shape at equal intervals in the middle of the filter portion 15, for example.

The tipping paper 16 is coupled to the tobacco portion 12 and the filter portion 15. The tipping paper 16 has a suction port 21 at one end portion, and the other end portion on the opposite side of one end portion overlaps the tobacco portion 12. The vent hole 18 is, for example, a hole provided through the tipping paper 16, or a hole penetrating the tipping paper 16 and the winding paper 14 up to the filter portion 15, and supplies air from the outside into the filter portion 15, mainly It has a function of diluting the smoke flowing in the filter portion 15.

The plurality of opening portions 17 are arranged, for example, in a ring shape of four rows. The number of rows of the opening portions 17 is not limited to four rows, and may be, for example, any number of rows from one row to six rows. In each row, for example, the circular opening portions 17 are arranged at equal intervals, for example. The shape of the opening portion 17 is not limited to a circular shape, and may be other shapes such as a polygonal shape. The plurality of opening portions 17 are provided in the axial direction A of the cigarette 11 (filter portion 15), and are disposed closer to the suction port 22 than the suction port 22 (the suction port 21) of the filter portion 15 (for example, 8 mm) (the suction port 21) Position (It is within the range of 8 mm from the suction port 22 (suction port 21)). Further, the plurality of opening portions 17 are formed in the axial direction A of the cigarette 11 (filter portion 15), and are preferably disposed closer to the suction port 22 than the position of the suction port 22 (suction port 21) of the filter portion 15 by, for example, 4 mm. The position of (suction port 21) (within the range of 4 mm from the suction port 22 (suction port 21)), or for example, preferably at a position closer to the suction port 22 (suction port 21) than the position of 2 mm (from the mouthpiece) 22 (intake port 21) is within the range of less than 2 mm). The opening portion 17 includes a first portion 17A that is disposed to penetrate the tipping paper 16, and a second portion 17B that is disposed in the filter portion 15 (wrap paper 14 and filter). Body 13).

The diameter of the filter portion 15 is, for example, from 5 mm to 9 mm, for example, 8 mm. Further, the length of the circumference of the filter portion 15 is, for example, from 16 mm to 28 mm, for example, 25 mm.

The filter portion 15 is provided adjacent to the tobacco portion 12 at an end portion on the opposite side of the end portion 22A of the suction port 22. The filter main body 13 has a second portion 17B that is provided with an opening portion 17 that is continuous with the first portion 17A. Each of the second portions 17B is formed to extend from the first portion 17A toward the center and stop at a predetermined depth. The value of the depth of the first portion 17A of each of the opening portions 17 and the depth of each of the second portions 17B is increased, for example, from 0.11 mm to 2.61 mm. Further, the first portion 17A and the second portion 17B of the opening portion 17 are formed integrally, and are formed, for example, by laser processing. The depth (defect depth) of the depth of the first portion 17A of the opening portion 17 and the depth of the second portion 17B is specifically described in Comparative Example 101 and Examples 101 to 123 which will be described later. Made under the conditions. Further, the filter body 13 may be provided with the opening portion 17 (portion of the first portion 17A and the second portion 17B) only in the tipping paper 16 and the winding paper 14 without providing the second portion 17B.

The method of manufacturing the first portion 17A and the second portion 17B of the opening portion 17 is not limited to laser processing, and may be, for example, a mechanical processing method for punching and punching using a needle-shaped tooth die (pressing), and corona. Electrical method of discharge.

The angle of the opening portion 17 can also be arbitrarily set. That is, in the present embodiment, each of the opening portions 17 is formed at an angle of 90° with respect to the wiring direction of the cross section of the filter portion 15, but the angle of each of the opening portions 17 can be formed at an arbitrary angle. For example, Fig. 10 is a cross-sectional view showing the filter unit 15 cut along a plane orthogonal to the axial direction A, and shows a first modification of the embodiment. As shown in the figure, for example, in the plane orthogonal to the axial direction A, the opening portion 17 may be formed at an arbitrary angle as long as it is 1° or more and 179° or less with respect to the wiring direction (in FIG. 10, the display is shown in FIG. 10 In the case of the case of 60°, the angle with respect to the wiring direction is smaller than 90°, and in the tenth figure, the opening portion 17 is set in the clockwise direction toward the direction in which the smoke flows out in a spiral shape. Further, when the angle with respect to the wiring direction is larger than 90°, in the tenth diagram, the opening portion 17 is formed to extend in the counterclockwise direction in a direction in which the smoke flows in a spiral shape. In addition, Fig. 11 is a cross-sectional view showing the filter portion 15 cut along the plane along the axial direction A, and shows a second modification of the embodiment. As shown in the figure, for example, in the plane along the axial direction A, the opening portion 17 may be formed at an arbitrary angle as long as it is 1° or more and 179° or less with respect to the wiring direction (in FIG. 11 , An example of a case of 60° is shown. Further, here, when the angle with respect to the wiring direction is smaller than 90°, the opening portion 17 is formed to extend in a direction away from the axis A as it approaches the suction port 22. Further, when the angle with respect to the wiring direction is larger than 90°, the opening portion 17 is formed to extend in a direction closer to the axis A as it approaches the suction port 22. ). Further, the first modification and the second modification may be combined, and a predetermined angle (an angle of 1° or more and 179° or less) may be formed in a plane orthogonal to the axial direction A as an example. 60°), and the opening portion is formed in a plane along the axial direction A so as to form a predetermined angle (an angle of 1° or more and 179° or less, for example, 60°) with respect to the wiring direction. 17.

The filter body 13 can be formed using various filler materials. In the present embodiment, the filter main body 13 is made of, for example, a filler of cellulose-based semisynthetic fibers such as acetate, and the filler is not limited thereto. As the filler, for example, plant fibers such as cotton, hemp, manila hemp, coconut, rush, animal fibers such as wool and cashmere wool, cellulose-based regenerated fibers such as rayon, cellulose acetate such as diacetate or triacetate can be used. Synthetic fibers such as semi-synthetic fibers, nylon, polyester, propylene, polyethylene, polypropylene, or the like. The components of the filter unit 15 may be an activated carbon filter containing activated carbon or a filter containing particulate matter other than activated carbon, in addition to the cellulose acetate filter. Further, examples of the granular material other than activated carbon include powders such as cellulose acetate particles and cyclodextrin, and microcapsules. Further, the filter portion 15 may be composed of two or more portions.

Further, there is no particular limitation on the filtration used in the filter portion 15. The type of plasticizer of the main body 13. For example, triethyl citrate, ethyl triethyl citrate, tributyl citrate, dibutyl tartrate, epoxy terminated polyethylene glycol (EPEG), polyethylene glycol monomethyl ether can be used. (MPEG), triacetin, trimethyl phosphate, triphenyl phosphate, tripropionate or a combination of the above materials. Plasticizers may also be used as appropriate.

Further, the filter body 13 may not contain a mint or the like. Regardless of the flavoring method of the taste, some methods may be used, such as disposing a string-like substance that adsorbs taste in the filter body 13, or adding a taste to the filler of the filter portion 15, or fixing the capsule or the like. The material of the taste is disposed in the filter portion 15. The type and material of the winding paper 14 of the filter main body 13 of the filter unit 15 are not limited. It may be a woven paper that is ventilated in a general product, or may be ventilated. As for the material of the wound paper, paper made of vegetable fibers is generally used, but paper sheets or polymer sheets using chemical fibers of a polymer type (polypropylene, polyethylene, nylon, etc.) may be used. A metal foil such as aluminum foil can also be used.

In the filter main body 13, an unpackaged filter such as Fig. 15 of Japanese Patent No. 4262247 can also be used. The unpackaged filter has a filter material and forms the filter material into a cylindrical outer skin layer, and the skin layer can be obtained by thermoforming of the filter material. Therefore, it is not necessary to wind the paper when using a non-packaged filter.

The material of the tipping paper 16 is not limited. In the case of the tipping paper 16, generally, paper made of vegetable fibers is used, and sheets using chemical fibers of a polymer type (polypropylene, polyethylene, nylon, etc.) may be used. As the material or the polymer-based sheet, a metal foil such as an aluminum foil can also be used.

Next, the manufacturing procedure of the cigarette 11 of the present embodiment will be described. First, the tobacco portion 12 (smoke) and the filter portion 15 having a length of two parts are manufactured by a general method. Then, the filter portion 15 having a length of two parts is inserted between the two tobacco portions 12. Further, the pieces are wound up by using the tipping paper 16 having a length of two parts to form a rod to which the tobacco portion 12 and the filter portion 15 are coupled. Then, while the connected rods are advanced at a predetermined speed, a continuous output beam output from a laser oscillator such as a CO ₂ laser is output using a rotary shredder or the like, and is pulsed from the outer circumferential direction of the rod. To illuminate. A vent hole 18 is formed in the tipping paper 16 by the pulsed laser light. At the same time as this step, the first portion 17A of the opening portion 17 is formed in the tipping paper 16 and the winding paper 14 by the pulsed laser light, and the filter portion 13 is formed with the second portion 17B of a predetermined depth. Next, the filter unit 15 and the tipping paper 16 are cut by a cutter at a central position of the filter unit 15 having a length of two to produce one cigarette 11.

Further, the method of manufacturing the opening portion 17 is not limited to the above. For example, the opening portion 17 may be provided after the vent hole 18 is provided by using the CO ₂ laser, and the vent hole 18 may be provided after the opening portion 17 is provided by the CO ₂ laser. Further, the tipping paper 17 may be formed by using a CO ₂ laser when the cigarette 11 is manufactured by using the tipping paper 16 provided with the vent hole 18 in advance. Further, the tipping paper 16 provided with the opening portion 17 in advance may be used, and the vent hole 18 may be formed by using a CO ₂ laser when the cigarette 11 is manufactured (in this case, the opening portion 17 is opened only by the tipping paper 16). And as another method, the opening portion 17 may be provided by a CO ₂ laser after a normal cigarette is manufactured.

(measuring device)

Referring to Fig. 3, a measuring device 24 for evaluating the diffusion effect of the smoke (air flow) of the cigarette 11 having the above configuration will be described. The measuring device 24 includes an air flow path separating fixing device (jig) 25, a first film flow meter 26, a second film flow meter 27, a first valve 31 adjacent to the first film flow meter 26, and a second valve 32. It is adjacent to the second membrane flow meter 27; the pump 33 (suction pump) sucks air from the air flow path separating fixture 25; and the exhaust unit 34, which is exhausted from the pump 33 Discharge it. At the upstream side of the pump 33, a buffer for preventing the pulsation of the pump 33 is provided. In addition, the suction flow of the pump 33 is controlled by a mass flow controller at a flow rate of 1050 ml/min.

The first membrane flowmeter 26 and the second membrane flowmeter 27 can measure the flow rate of the smoke (actually air) discharged to the first portion 35 and the second portion 36, respectively. When the cigarettes 11 are sucked by the pump 33 in a state where the cigarettes 11 are not mounted in the air flow path separating/fixing device 25, the first valve 31 and the second valve 32 are respectively flowed and passed through the air passing through the first portion 35. The flow rates of the air in the two portions 36 were each 50%, specifically, the flow rate was adjusted so as to be 525 ml/min each.

The air flow path separating and fixing device 25 has a first portion 35 (cell) which is disposed at a distance from the cigarette 11 so as to discharge smoke (air) flowing out from the end surface 22A of the filter portion 15 Position; second part 36 (cell), which is to be the second part from the filter part 15 The smoke from the portion 17B and the opening portion 17 is discharged to be close to the cigarette 11; the first seal 37 is provided at a position between the first portion 35 and the second portion 36; and the second seal 38 is provided. It is provided in such a manner as to be attached to the tipping paper 16 of the cigarette 11. The tubes extending from the first portion 35 and the second portion 36 are joined at the downstream side and connected to the pump 33.

The first portion 35 and the second portion 36 each have a hollow disk shape, and the internal volume thereof is the same. On the inner side of the first portion 35, a cylindrical elongated tubular portion 41 attached to the suction port 21 of the tipping paper 16 of the cigarette 11 is disposed. The extension cylinder portion 41 is formed of, for example, a belt having an adhesive layer on one side, and is formed in a tubular shape so as to be attached to the suction port 21 of the tipping paper 16 so as not to close the opening portion 17. The extension cylinder portion 41 guides the smoke (air) discharged from the end surface 22A of the filter portion 15 to the inside of the first portion 35.

The first and second seals 37 and 38 are each formed in a ring shape. The first seal 37 is capable of hermetically separating the internal space of the first portion 35 from the internal space of the second portion 36 in a state in which the extended tubular portion 41 is inserted inside. The second seal 38 is capable of hermetically separating the internal space of the second portion 36 from the outside in a state in which the cigarette 11 is inserted inside.

(Example)

Under the conditions of Comparative Example 101 and Examples 101 to 123 shown in Fig. 4, a cigarette 11 as an example of a smoking article was produced. At this time, the defect rate of the filter unit 15 is determined by the following mathematical expression. First, the tobacco portion 12 and the filter portion 15 are cut before the measurement of the defect rate is performed. open. Then, the filter portion 15 in a state in which the wound paper 14 and the tipping paper 16 are wound is immersed in a 30 vol% aqueous ethanol solution, and only the tipping paper 16 is separated from the filter main body 13. The separated tipping paper 16 is extended and attached to the prepared sample and allowed to dry. The opening portion 17 is enlarged by an optical microscope, and the area of the opening portion 17 is measured using the soft body of the measurement area. The entire defect area in the vicinity of the suction port 21 of the tipping paper 16 is the value of the number of all the opening portions 17 by using the area of one opening portion 17. At this time, the area of one of the opening portions 17 is an arbitrary measurement of the area of the 30 opening portions 17, and the arithmetic mean thereof is used. In addition, the value of the area of the filter portion 15 in which the entire defect area is divided by the tipping paper 16 from the suction port 21 to 8 mm is set as the defect rate.

The defect depth is determined by coloring the filter main body 13 with a dye and measuring the depth of the second portion 17B. Specifically, the defect depth is such that the opening portion 17 is cut perpendicularly to the axial direction A of the filter portion 15, and when the cross section is uniformly colored, the defective portion of the opening portion 17 is not colored. The state is presented. Measure its depth. At this time, the second portion 17B is enlarged by an optical microscope or a magnifying glass, and the depth is measured. The value of this defect depth is arbitrarily measured by the depth of the ten second portions 17B, and is determined by the arithmetic mean. Further, the opening portion 17 is provided only for the tipping paper 16 and the winding paper 14, and when the second portion 17B is not provided for the filter body 13, the thickness of the tipping paper 16 and the winding paper 14 is set to the defect depth. Among the defect depths shown in the table of Fig. 4, the 0.11 mm is the opening portion 17 The tipping paper 16 and the winding paper 14 are not penetrated, and the opening portion 17 is stopped within the range of the thickness of the tipping paper 16 and the winding paper 14. Among the defect depths shown in the table of Fig. 4, the opening portion 17 (the first portion 17A) is formed to penetrate the tipping paper 16 and is also formed in the winding paper 14 and the filter body 13 in a predetermined depth of 0.14 mm or more. The state of the second part 17B of the depth.

Through the above-described measuring device, the entire flow rate of the smoke (air) passing through the cigarette 11 (the flow rate Q ₁ through the end face 22A of the filter portion 15 + the flow rate Q ₂ passing through the opening portion 17) passes through the opening portion 17 The ratio F of the flow rate Q ₂ of the smoke (air) is measured. The mathematical formula for calculating F is as follows. The result is shown in Fig. 4. According to Fig. 4, it can be seen that when the defect depth is 0.14 mm or more, the air ratio F passing through the opening portion 17 is rapidly increased regardless of the defect rate.

An illustration of each of the embodiments shown in Fig. 4 is shown in Fig. 5. In Fig. 5, the same reference numerals are attached to the embodiments in which the defect depths are the same. It can be seen that in any of the defect depths, as the defect rate increases, the air ratio F passing through the opening portion 17 substantially increases. Further, the air ratio F of Examples 101 to 123 was a value of 2.80% or more and 68.9% or less.

For Comparative Example 101 and Examples 101 to 123, the diffusion state of mainstream smoke (air) was observed. From Fig. 6 to Fig. 8, the diffusion state of the mainstream smoke of Comparative Example 101 and Example 101 and Example 117 belonging to the representative examples are shown. Passing the mainstream smoke flowing out from the filter portion 15 The transparent container 42 made of acrylic was photographed by a digital camera, and photographed as an image every 0.1 seconds from the start of smoking. Fig. 6 to Fig. 8 schematically show one of the portraits. The smoking condition was based on the smoking capacity: 55 ml / 2 sec. When the cigarette 11 was naturally burned 20 mm from the front end, smoking began.

The comparative example 101 shown in Fig. 6 is a case of the mainstream smoke (air) of the general cigarette 11, and the mainstream smoke flows out from the end surface 22A of the filter portion 15 in the horizontal direction as indicated by a broken line. As shown by the broken line in Fig. 7, the cigarette 11 of the example 101 confirmed that most of the flue gas flows out of the mainstream smoke in the horizontal direction in the same manner as in the comparative example 101, and from the outer peripheral portion of the filter portion 15 (the opening portion) 17) Smoke (air flow) flows vertically. Further, as shown by a broken line in Fig. 8, in Example 117, a large amount of smoke (air) from the filter portion 15 was confirmed in addition to the outflow of the smoke in the horizontal direction as seen in Comparative Example 101 and Example 101. The outer peripheral portion (opening portion 17) flows out.

Further, when Comparative Example 101 and Examples 101 to 123 were evaluated for smoking taste by a plurality of persons, the cigarettes 11 of Examples 101 to 123 were evaluated to have a higher smoking taste than Comparative Example 101.

Similarly, the fluffing test of the filter unit 15 was carried out for the cigarettes of the shapes of the cigarettes of the examples 101 to 123 and the shapes described in JP-A-59-102386. The cigarettes of the shape described in the cigarettes of the respective embodiments are inserted into the cigarette holder of the automatic smoking device used in the general smoking test, for example, seven times, and the optical microscope is used. The vicinity of the suction port 22 of the filter portion 15 is observed. In the cigarette of the shape described in Japanese Laid-Open Patent Publication No. SHO 59-102386, it is observed that the filter portion 15 is raised near the suction port 21. Conversely, in various embodiments Cigarette 11, no fuzzing was observed.

Further, it is evaluated whether or not the air ratio F of the opening portion 17 is changed by whether or not the vent hole 18 is provided in the filter portion 15. In the cigarette 11 having the same defect rate and defect depth as the conditions of Example 102, Example 107, Example 108, Example 111, Example 112, Example 116, Example 117, Example 119, and Example 120 Use the plug vent hole 18. The result of measuring the air ratio F passing through the opening portion 17 of each sample is shown in Fig. 9. The horizontal axis represents the air ratio F of the opening portion 17 when the vent hole 18 is provided, and the vertical axis represents the air passage ratio F of the opening portion 17 when the vent hole 18 is not provided. It is known from Fig. 9 that the plot is substantially on the straight line of Y = X under any defect condition. From the above, it was confirmed that the air ratio F passing through the opening portion 17 does not change due to the presence or absence of the vent hole 18. Further, as a means for lowering the tarification of the cigarette 11, the vent hole 18 is the main means, and based on the results of the review, it is understood that the present invention can be applied to any tar range.

According to the first embodiment and the examples 101 to 123, the smoking article (cigarette 11) includes the tobacco portion 12, the filter portion 15 having the suction port 22, and a cylindrical covering portion covering the tobacco portion 12 and the filter portion 15. a plurality of opening portions 17 provided in the covering portion near the suction port 22.

According to this configuration, since the opening portion 17 is provided in the vicinity of the suction port 22, the smoke can flow out not only from the end portion 22A of the filter portion 15, but also from the opening portion 17. In this way, the smoke in the mouth is easily spread when smoking, and the taste of smoking can be further improved. Further, according to the above configuration, a special filter cutting step is not required at the time of manufacture, and a general cigarette making machine can be used to manufacture the opening. The cigarette 11 of the portion 17 can simplify the manufacturing steps and prevent an increase in cost. Further, the cigarette 11 having the above-described configuration is covered with the tipping paper 16 and the winding paper 14 in the same manner as a general cigarette. Therefore, it is possible to prevent the filter fiber from being deteriorated due to fuzzing or the like during smoking. .

The smoking article (cigarette 11) penetrates the aforementioned covering portion up to the filter portion 15. According to this configuration, it is possible to further promote the outflow of the smoke from the opening portion 17. In this way, the spread of smoke during smoking is increased to further enhance the taste of smoking.

The plurality of second portions 17B are disposed closer to the suction port 22 than the suction port 22 at a position 8 mm from the suction port 22 in the axial direction A of the filter portion 15. According to this configuration, the opening portion 17 can be provided at the place where it is located in the oral cavity during smoking.

In addition, the flow rate F of the smoke flowing out from the opening portion 17 is 2.8% or more and 68.9% or less with respect to the total flow rate of the smoke flowing out from the end surface 22A of the filter portion 15 and the opening portion 17. According to this constitution (condition), the smoker can actually feel the spread of the smoke in the mouth when smoking.

(Second embodiment of smoking articles)

Next, a second embodiment and a third embodiment of the cigarette 11 which is an example of a smoking article will be described with reference to Figs. 12 and 13 . The differences from the first embodiment will be mainly described, and the description of the portions common to the first embodiment will be omitted.

As shown in Fig. 12, in the second embodiment of the cigarette, the tipping paper 16 is annularly removed in a predetermined width in the vicinity of the suction port 21 (suction port 22) of the cigarette 11, and one exposed portion 51 is formed. The exposed part 51 will The winding paper 14 is exposed to the outside. The exposed portion 51 is provided at a position closer to the suction port 21 (suction port 22) than the position of 8 mm from the suction port 21 (suction port 22) in the axial direction A of the filter portion 15. However, the exposed portion 51 is preferably closer to the suction port 22 (suction port 21) than the distance from the suction port 22 (suction port 21) by 4 mm, or more preferably closer to the suction port 22 than the distance 2 mm. The position of (suction port 21). According to this embodiment, similarly to the first embodiment and the examples 101 to 123, the diffusion effect of the smoke in the oral cavity can be expected to some extent, and the smoking taste can be further improved.

(Third embodiment of smoking article)

The differences from the first embodiment will be mainly described, and the description of the portions common to the first embodiment will be omitted.

As shown in Fig. 13, in the third embodiment of the cigarette of an example of a smoking article, the tipping paper 16 is triangularly removed in the vicinity of the suction port 21 (suction port 22) of the cigarette 11, and a plurality of exposed portions 51 are formed. . The plurality of exposed portions 51 are provided in the axial direction A of the filter unit 15 at a position closer to the suction port 21 (suction port 22) than the position of 8 mm from the suction port 21 (suction port 22). However, the plurality of exposed portions 51 are preferably disposed closer to the suction port 22 (suction port 21) than the position 4 mm from the suction port 22 (suction port 21), or more preferably at a position closer to 2 mm. The position of the suction port 22 (suction port 21). The plurality of exposed portions 51 expose the wound paper 14 to the outside. According to this embodiment, similarly to the first embodiment and the examples 101 to 123, the diffusion effect of the smoke in the oral cavity can be expected to some extent, and the smoking taste can be further improved.

In the third embodiment, the shape of the exposed portion 51 is not limited to triangle. The exposed portion 51 may have a circular shape such as a circular shape or a circular shape, a polygonal shape such as a square shape, a rhombus shape, a parallelogram shape, a trapezoidal shape, or a cross shape, or a shape in which the shape is combined. Alternatively, the exposed portion 51 may extend to the suction port 21 in the above-described shape, and the geometric shape of the exposed portion 51 may be set to an arbitrary angle.

(Fourth embodiment of smoking articles)

Next, a fourth embodiment of a smoking article will be described with reference to Fig. 14. The smoking article according to the fourth embodiment is applied to a smoking article 53 that attracts the flavor of tobacco by a non-heating type. Here, the differences from the first embodiment will be mainly described, and the same reference numerals will be given to the same portions as those in the first embodiment, and the description thereof will be omitted. In Fig. 14, the upper half of the smoking article 53 is cut by the plane passing through the axis A.

As shown in Fig. 14, the smoking device 53 has a tobacco portion 12 which is composed of cut tobacco (tobacco), and a cylindrical first filter portion 15A and a second filter portion 15B which are adjacent to the tobacco portion 12. The tubular portion is a resin-covered cover portion 52 that covers the tobacco portion 12, the first filter portion 15A and the second filter portion 15B, and the opening portion 17 that is provided to penetrate the cover portion 52. The first filter portion 15A has a suction port 22. The cover portion 52 has a suction port 21 at one end portion.

The opening portion 17 is provided in the vicinity of the suction port 22 of the covering portion 52, and is disposed closer to the suction port 22 (suction port 21) than the distance from the suction port 22 (suction port 21) 8 mm in the axial direction A of the first filter portion 15A. The location. However, it is preferable that the opening portion 17 is closer to the suction port 22 (suction port 21) than the distance from the suction port 22 (suction port 21) by 4 mm, or better. It is also possible to position the suction port 22 (suction port 21) closer to the position 2 mm from the distance. The plurality of opening portions 17 are arranged, for example, in a ring shape of four rows. The opening portion 17 includes a first portion 17A that is provided to penetrate the cover portion 52 and a second portion 17B that is stopped in the middle of the first filter portion 15A. And set.

According to this embodiment, as in the first embodiment and the examples 101 to 123, the diffusion effect of the smoke in the oral cavity (the air containing the flavor of the tobacco from the filter portion) can be expected, and the smoking taste can be further improved. .

(filter implementation)

An embodiment of a filter to be used for smoking articles will be described with reference to Fig. 15. Although the filter 81 is different from the smoking article itself, the structure of the opening portion to be applied is the same as that of the above-described smoking article. Therefore, a part different from the structure of the smoking article of the first embodiment will be mainly described, and a common symbol will be added to the portion common to the first embodiment. In Fig. 15, the upper half of the filter 81 is cut by the plane passing through the axis A to be displayed.

The filter 81 is detachably attached to a smoking article, for example, a general cigarette 11 as described above. The filter 81 includes a cylindrical portion 82 made of resin attached to one end portion of the smoking article (cigarette 11), and a cylindrical filter portion 15 having a suction port 22 and disposed inside the cylindrical portion 82; And a plurality of opening portions 17 provided in the tubular portion 82 in the vicinity of the suction port 22.

The opening portion 17 is provided in the axial direction A of the filter portion 15. It is closer to the suction port 22 (suction port 21) than the position 8 mm from the suction port 22 (suction port 21). However, the opening portion 17 is preferably closer to the suction port 22 (suction port 21) than the distance from the suction port 22 (suction port 21) by 4 mm, or more preferably, closer to the distance 2 mm. The position of the suction port 22 (suction port 21). The plurality of opening portions 17 are arranged, for example, in a ring shape of four rows. The opening portion 17 includes a first portion 17A that is formed to penetrate the tubular portion 82 and a second portion 17B that is stopped in the middle of the first filter portion 15 And set.

According to this embodiment, as in the first embodiment and the examples 101 to 123, the diffusion effect of the smoke in the oral cavity or the air containing the fragrance of the tobacco from the filter portion can be expected, and the smoking taste can be further improved.

In addition, the smoking article (cigarette 11) and the filter 81 are not limited to the above-described embodiments and the respective embodiments, and in the present embodiment, the constituent elements are changed and embodied without departing from the spirit. For example, some of the constituent elements may be deleted from all of the constituent elements of the embodiment and the examples, or constituent elements of different embodiments and examples may be appropriately combined.

(Fifth Embodiment of Smoking Article)

Hereinafter, a fifth embodiment of a cigarette of an example of a smoking article will be described with reference to Figs. 16 and 17 . The difference from the first embodiment will be mainly described, and the description of the portions common to the first embodiment will be omitted. In addition, in smoking articles, cigarettes and snow are included. Cigarettes, hand-rolled tobacco, cigarillos, smoking articles that attract tobacco flavors by electronic device heating or heat sources, and smoking articles (trade name: zero-degree fashion mint) that utilize non-heated tobacco-scented flavors. In Fig. 16, the upper half of the cigarette 11 is cut by the plane passing through the axis A.

As shown in Figs. 16 and 17, the cigarette 11 is provided with a tobacco portion 12 which is formed in a cylindrical shape by surrounding the tobacco (tobacco) with a cigarette paper, and a cylindrical filter portion 15 which covers the filter main body 13 And a winding paper 14 around the filter body 13; a tipping paper 16 disposed across the tobacco portion 12 and the filter portion 15; and an opening portion 17 for penetrating the winding paper 14 and the tipping paper Set by 16 way. In the present embodiment, the tipping paper 16 is an example of a cylindrical covering portion that covers the tobacco portion 12 and the filter portion 15. Further, the cigarette 11 may include a vent hole 18 (vent hole) that is annularly provided at equal intervals in the intermediate position of the filter portion 15, for example.

The tipping paper 16 is coupled to the tobacco portion 12 and the filter portion 15. The tipping paper 16 has a suction port 21 at one end portion, and overlaps the tobacco portion 12 at the other end portion on the opposite side to one end portion. The vent hole 18 is, for example, a hole that is provided to penetrate the tipping paper 16, or a hole that penetrates the tipping paper 16 and the winding paper 14 to reach the filter portion 15, and supplies air from the outside to the filter portion 15, It mainly has a function of diluting the smoke flowing in the filter portion 15.

The plurality of openings 17 are, for example, arranged in a ring shape (or radial shape) in one row, or may be arranged in a plurality of rows. A plurality of, for example, circular opening portions 17 are arranged on the respective rows, for example, at equal intervals. A plurality of opening portions 17 are provided in the vicinity of the suction port 22 of the filter portion 15. More specifically, a plurality of openings The portion 17 is provided in the axial direction A of the cigarette 11 (filter portion 15) at a position closer to the suction port 22 (suction port 21) than, for example, 8 mm from the suction port 22 (suction port 21) of the filter unit 15 ( It is not within the range of 8 mm from the suction port 22 (suction port 21). However, the plurality of opening portions 17 are preferably located closer to the suction port 22 (suction port 21) than the suction port 22 (suction port 21) of the filter portion 15 by, for example, 4 mm, or more preferably It is closer to the suction port 22 (suction port 21) at a position other than 2 mm. The opening portion 17 includes a first portion 17A that is disposed to penetrate the tipping paper 16 and a second portion 17B that is disposed in the filter portion 15 (the winding paper 14 and Filter body 13).

The diameter of the filter portion 15 is, for example, 5 mm to 9 mm, for example, 8 mm. Further, the length of the circumference of the filter portion 15 is, for example, 16 mm to 28 mm, for example, 25 mm.

The filter portion 15 is provided adjacent to the tobacco portion 12 at an end portion on the opposite side to the end surface 22A of the suction port 22. The filter body 13 has a second portion 17B that is provided with an opening portion 17 that is continuous with the first portion 17A. Each of the second portions 17B is formed to extend from the first portion 17A toward the center and stop at a predetermined depth. Further, the first portion 17A and the second portion 17B of the opening portion 17 are formed integrally, and are formed collectively by, for example, laser processing. The depth (defect depth) of the depth of the first portion 17A of the opening portion 17 and the depth of the second portion 17B is increased, and specifically, it is produced under the conditions of Comparative Example 201 and Examples 201 to 213 which will be described later. Further, the second main portion 17B may not be provided in the filter main body 13, and only the opening portion may be provided in the tipping paper 16 and the winding paper 14. 17 (Part 1 17A and part of Part 2 17B).

The opening portion 17 is provided to form an angle θ between the axis A passing through the center of the filter portion 15. The angle at which the opening portion 17 is provided is set in such a manner as to be described later in the respective embodiments. For example, the angle θ formed between the opening portion 17 and the axis A of the filter portion 15 can be set, for example, from 1° to 179°, but the angle of the opening portion 17 is not limited thereto. The angle θ formed between the opening portion 17 and the axis A of the filter portion 15 may be set to 1 or more and 90 or less. At this time, in other words, the opening portion 17 is provided obliquely with respect to the axis A of the filter portion 15. Here, when the angle θ is smaller than 90°, it is assumed that the opening portion 17 extends away from the axis A as it approaches the suction port 22 . Further, when the angle θ is larger than 90°, it is assumed that the opening portion 17 extends in a direction approaching the axis A as approaching the suction port 22.

The method of manufacturing the first portion 17A and the second portion 17B of the opening portion 17 is not limited to a laser processing method, and may be a method or a mechanical property of punching and punching through a needle-shaped tooth mold (pressing). Electrical method for corona discharge. In the present embodiment, the opening portion 17 is formed in a circular shape, but the shape of the opening portion 17 is not particularly limited. The opening portion 17 is, for example, a circular shape such as a circular or an elliptical shape, a polygonal shape such as a triangle, a quadrangle, a rhombus, a parallelogram, a trapezoid, a cross, or the like, or a shape in which the shape is combined, or may be the above shape Extend to the mouthpiece 22. Further, the shape of the opening portion 17 may be any direction, or the angle (direction) may be changed between the adjacent opening portions 17, and a plurality of the opening portions 17 may be combined.

Next, the manufacturing procedure of the cigarette 11 of the present embodiment will be described. First, the tobacco portion 12 (smoke) and the filter portion 15 having a length of two parts are manufactured by a general method. Then, the filter portion 15 having two lengths is inserted between the two tobacco portions 12. Then, the rods which are coupled to the tobacco portion 12 and the filter portion 15 are formed by winding the pieces of paper having a length of two copies. Then, the continuous output beam which is output from a laser oscillator such as a CO ₂ laser or the like is rotated from the outer circumferential direction of the rod by using a rotary chopper or the like while traveling the connected rod at a predetermined speed. Irradiation is performed in a pulsed manner. A vent hole 18 is formed in the tipping paper 16 by the pulsed laser light. At the same time, the first portion 17A of the opening portion 17 is formed in the tipping paper 16 and the winding paper 14 by the pulsed laser light, and the second portion 17B having a predetermined depth is formed in the filter body 13. Then, the filter unit 15 and the tipping paper 16 are cut by a cutter at a central position of the filter unit 15 having a length of two to produce one cigarette 11.

Further, the method of manufacturing the opening portion 17 is not limited to the above. For example, using a CO ₂ laser may also be provided later vent hole 18 is provided openings 17, or conversely can vent hole 17 is provided in the use of the CO ₂ laser 18 is provided an opening portion. Further, the tipping paper 16 may be formed by using the CO ₂ laser when the cigarette 12 is manufactured by using the tipping paper 16 provided with the vent hole 18 in advance. Further, the tipping paper 16 provided with the opening portion 17 in advance may be used, and the vent hole 18 may be formed by the CO ₂ laser when the cigarette 11 is manufactured (in this case, the opening portion 17 is opened only in the tipping paper 16). Further, as another method, after the general cigarette is manufactured, the opening portion 17 may be provided by a CO ₂ laser. In either case, the laser beam irradiated to form the opening portion 17 is irradiated so as to form an angle θ with respect to the axis A.

(observation of smoke and image analysis of smoke)

Under the conditions of Comparative Example 201 and Examples 201 to 213 shown in Fig. 18, a cigarette 11 of an example of a smoking article was produced. The outer peripheral portion of the suction port 22 of the cigarette 11 is irradiated with a laser beam at an angle θ with respect to the axis A, and an opening portion 17 (Examples 201 to 207) which forms an angle θ with respect to the axis A is formed on the outer peripheral portion of the filter portion 15. Further, by changing the intensity of the irradiated laser, cigarettes 11 having different opening angles (for example, 45°) and having different depths (Examples 208 to 213) are produced. The opening area, the opening depth, and the opening angle of the produced cigarette 11 are shown in the table of Fig. 18. In the table of Fig. 18, the opening angle indicates the set value of the irradiation angle set in the laser processing machine. In addition, as a condition common to the respective embodiments, the opening portion 17 is provided in 37 cigarettes 1 and arranged in a row so as to be disposed at a position of about 1.5 mm from the suction port.

The opening depth and the opening angle of the created opening portion 17 were measured in the following manner. First, the razor is cut from the suction port 22 (the end surface of the suction port) of the filter portion 15, and the filter portion 15 is divided into two by (for example, chopping wood), and the defect portion is enlarged by an optical microscope or a magnifying glass to measure the opening portion 17 depth. The opening depth is arbitrarily measured for 10 opening portions 17, and the arithmetic mean thereof is set to the opening depth. By arbitrarily setting the irradiation angle of the laser, the opening operation can be performed in the filter portion 315 according to the angle. Further, it is understood that when the irradiation angle of the laser is changed, the opening area becomes smaller as the angle approaches 90°, and the opening depth tends to be deep. It is presumed that the laser is obliquely irradiated so that the irradiation area of the filter portion 15 is increased, and the opening is made. The area is increased, and the depth of the opening is correspondingly reduced. However, by adjusting the irradiation area and the intensity of the laser, the opening area and depth can be individually operated.

The opening area of the opening portion 17 is measured in the following manner. After the opening portion 17 is formed in the outer peripheral portion of the filter portion 15 of the tobacco, the cigarette portion (tobacco portion 12) and the filter portion 15 are cut. The filter portion 15 in a state in which the wound paper 14 and the tipping paper 16 are wound is immersed in a 30 vol% aqueous ethanol solution, and only the tipping paper 16 is separated from the filter main body 13. The separated tipping paper 16 is extended to fit the prepared sample and allowed to dry. The opening portion 17 is enlarged by an optical microscope, and the area of the opening portion 17 is measured using the soft body of the measurement area. The area (opening area) of the opening portion 17 is an arbitrary measurement of 30 opening portions 17, and the arithmetic mean thereof is used.

For Comparative Example 201 and Examples 201 to 213, the diffusion state of mainstream smoke (air) was observed. From Fig. 19 to Fig. 30, the diffusion states of the smoke of Comparative Example 201 and Examples 201 to 213 are shown. The smoke flowing out of the filter unit 15 was passed through a transparent container 42 made of acrylic, and this was photographed by a digital camera, and cut out as an image every 0.1 seconds from the start of smoking. The 19th, 21st, 23rd, 25th, 27th, 29th, 31st, 33th, and 35th to 40th drawings schematically show one such portrait. The smoking condition was smoking capacity: 55 ml/2 seconds, and smoking was started when the cigarette 11 was naturally burned 20 mm from the front end. The 20th, 22nd, 24th, 26th, 28th, 30th, 32th, and 34th drawings show the result of the portrait analysis of the portraits of the embodiments 201 to 207.

The image analysis method of each embodiment will be described. In the image analysis, the software is analyzed using the image sold in the market. In the image analysis of this embodiment, for example, a portrait will be taken from the start of smoking for 0.4 seconds. In the color processing, the image of the image (control image) in which the smoke does not flow out is subjected to monochrome processing. Thereafter, the image from the start of smoking for 0.4 seconds was subtracted with the control image as the background, and only the monochrome image of the smoke after 0.4 seconds from the start of smoking was taken out. For example, the brightness at each position perpendicular to the axis A of the filter portion 15 is measured at a position 1 mm from the suction port 22 (end port end surface). The term "brightness" refers to a value that is quantified from white to black, for example, white is 255, ochre is 0, and gray is based on the value between the concentrations. The value of the smoke is high, and the smoke-free place becomes zero. The horizontal axis is taken at a position perpendicular to the axis A of the filter unit 15, and the vertical axis is taken to obtain a map.

In addition, the position of the filter unit 15 corresponding to the image is set to 1 at the position perpendicular to the axis A of the filter unit 15, and the lower end of the filter unit 15 is set to -1 to normalize the position. The brightness is normalized by setting the highest brightness value to 1 for each corresponding image. The above method is an example of an image analysis method, and other image analysis methods may be employed.

In the comparative example 201 shown in Fig. 19, in the case of the mainstream cigarette 71 (air) of the general cigarette 11, the smoke (mainstream smoke 71) flows from the end surface 22A of the filter portion 15 to the horizontal direction as indicated by a broken line. At this time, according to the analysis result of the image in Fig. 20, in the comparative example 201, the mainstream smoke 71 is located between the upper end and the lower end of the filter portion 15, that is, the position is larger than -1 of the horizontal axis, and the ratio is +1. Smaller range. Therefore, it is known that in Comparative Example 201, the smoke did not spread.

In the cigarette 11 of the embodiment 201, most of the smoke (mainstream smoke 71) is the same as that of the comparative example 201, as shown by the broken line in Fig. 21, the smoke flow In the horizontal direction, smoke (diffusion smoke 72) flowing obliquely from the outer peripheral portion (opening portion 17) of the filter portion 15 with respect to the axis A is observed. According to the image analysis result of Example 201 shown in Fig. 22, some amount of smoke was observed in the portion of -1 or less and +1 or more on the horizontal axis.

A schematic view showing an image showing the degree of diffusion of the smoke of Example 202 is shown in Fig. 23. In Fig. 23, as shown by the broken line, in the embodiment 202, in addition to the outflow of the horizontally oriented smoke (mainstream smoke 71) as seen in Comparative Example 201 and Example 201, the observation from the opening portion 17 was observed. A large amount of diffused smoke 72 (air) flows out obliquely to the downstream side of the flow direction of the mainstream smoke 71 with respect to the axis A. Further, as is clear from Fig. 23, before the mainstream smoke 71 flows out, the diffused smoke 72 which flows obliquely from the opening portion 17 is first diffused. This phenomenon is presumed to be due to the flow path resistance at the position portion of the opening portion 17, and the flow path resistance of the portion through which the mainstream smoke 71 passes (near the suction port 22 of the filter portion 15) is also small.

According to the image analysis result of the embodiment 202 shown in Fig. 24, a certain amount of smoke is detected in a portion larger than +1 of the horizontal axis and a portion smaller than -1. According to the analysis result of Fig. 24, it is understood that the smoke spreads to about twice the diameter of the cigarette 11.

A schematic view showing an image showing the degree of diffusion of the smoke of Example 203 is shown in Fig. 25. In Fig. 25, it is observed that in addition to the smoke (mainstream smoke 71) flowing in the horizontal direction, there is also a large amount of diffused smoke flowing out from the opening portion 17 obliquely with respect to the axis A to the downstream side in the flow direction of the mainstream smoke 71. 72. The amount of the diffused smoke 72 flowing out from the opening portion 17 is increased as compared with the embodiment 202. The angle formed by the diffused smoke 72 flowing out of the opening portion 17 and the axis A The degree becomes larger than that of the embodiment 202. Further, in the same manner as in the embodiment 202, in the embodiment 203, the diffused smoke 72 is also diffused earlier than the flow of the mainstream smoke 71.

According to the image analysis result of the embodiment 203 shown in Fig. 26, a large amount of diffused smoke is detected in a portion larger than +1 of the horizontal axis and a portion smaller than -1. According to the analysis result of Fig. 26, it is detected that the smoke spreads to about 2 times to about 4 times the diameter of the cigarette 11.

A schematic view showing an image of the degree of diffusion of the smoke of Example 204 is shown in Fig. 27. In Fig. 27, it is observed that in addition to the smoke (mainstream smoke 71) flowing in the horizontal direction, there is also a large amount of diffused smoke flowing out from the opening portion 17 obliquely to the downstream side of the flow direction of the mainstream smoke 71 with respect to the axis A. 72. The angle formed by the diffused smoke 72 flowing out from the opening portion 17 and the axis A becomes larger than that of the embodiment 203. Further, similarly to the embodiment 202, 203, in the embodiment 204, the diffused smoke 72 is also diffused earlier than the flow of the mainstream smoke 71.

According to the image analysis result of the embodiment 204 shown in Fig. 28, smoke diffused to a portion larger than +1 of the horizontal axis and a portion smaller than -1 was detected. According to the analysis result of Fig. 28, it is detected that the smoke spreads to about 3 times the diameter of the cigarette 11.

A schematic view showing an image showing the degree of diffusion of the smoke of Example 205 is shown in Fig. 29. In Fig. 29, it is observed that, in addition to the smoke (mainstream smoke 71) flowing in the horizontal direction, there is a large amount of diffused smoke 72 which flows out obliquely from the opening portion 17 with respect to the axis A to the downstream side in the flow direction of the mainstream smoke 71. . The diffusion smoke 72 flowing out from the opening portion 17 and the axis A are formed. The angle is larger than in embodiment 204. As in the embodiments 202 to 204, in the embodiment 205, the diffused smoke 72 is also diffused earlier than the flow of the mainstream smoke 71.

According to the image analysis result of the embodiment 205 shown in Fig. 30, smoke diffused to a portion larger than +1 of the horizontal axis and a portion smaller than -1 was detected. According to the analysis result of Fig. 30, it was detected that a large amount of smoke diffused to the range of about 2.5 times to about 3.5 times the diameter of the cigarette 11.

A schematic view showing an image showing the degree of diffusion of the smoke of Example 206 is shown in Fig. 31. In Fig. 31, it is observed that in addition to the smoke (mainstream smoke 71) flowing in the horizontal direction, a large amount of diffused smoke 72 flowing out from the opening portion 17 in a direction substantially orthogonal to the axis A is observed. Similarly to the embodiments 202 to 205, in the embodiment 206, the diffused smoke 72 flowing out from the opening portion 17 is also diffused earlier than the flow of the mainstream smoke 71.

According to the image analysis result of the embodiment 206 shown in Fig. 32, smoke diffused to a portion larger than +1 of the horizontal axis and a portion smaller than -1 was detected. According to the analysis result of Fig. 32, it is detected that a large amount of smoke diffuses to about 2 times to about 4 times the diameter of the cigarette 11.

A schematic view showing an image of the degree of diffusion of the smoke of Example 207 is shown in Fig. 33. In Fig. 33, it is observed that, in addition to the smoke (mainstream smoke 71) flowing in the horizontal direction, there is also an upstream side flowing from the opening portion 17 obliquely with respect to the axis A to the flow direction of the mainstream smoke 71 (at the suction port 22) A large amount of diffused smoke 72 in the direction of the tobacco portion 12. Similarly to the embodiments 202 to 206, in the embodiment 207, the diffused smoke 72 flowing obliquely from the opening portion 17 is also diffused earlier than the flow of the mainstream smoke 71.

According to the image analysis result of Example 207 shown in Fig. 34, smoke diffused to a portion larger than +1 of the horizontal axis and a portion smaller than -1 was detected. According to the analysis result of Fig. 34, it is detected that a large amount of smoke diffuses to about 2 times to about 3 times the diameter of the cigarette 11. As described above, according to the observation of the smoke of Examples 201 to 207 and the analysis of the image of the smoke, the angle θ formed between the opening portion 17 and the axis A of the filter portion 15 is not less than 20° and 110° or less. The spread of smoke in the mouth can be said to be generally good.

In the embodiments 208 to 213, the angle θ formed between the opening portion 17 and the axis A of the filter portion 15 is set to 45°, and the depth (opening depth) of the opening portion 17 is different between the respective embodiments. .

A schematic view showing an image showing the degree of diffusion of the smoke of Example 208 is shown in Fig. 35. In the embodiment 208, the opening portion 17 is provided only in the tipping paper 16, and the depth of the opening portion is 0.04 mm. In the thirty-fifth diagram, as indicated by a broken line, in the embodiment 208, the smoke (mainstream smoke 71) flows out from the end surface 22A of the filter portion 15 in the horizontal direction. Further, it is confirmed that the diffused smoke 72 slightly flows out from the opening portion 17.

A schematic view showing an image showing the degree of diffusion of the smoke of Example 209 is shown in Fig. 36. In Example 209, the tipping paper 17 and the winding paper 14 were provided with the opening portion 17, and the depth of the opening portion 17 was 0.11 mm. In Fig. 36, as indicated by a broken line, in the embodiment 209, most of the smoke (mainstream smoke 71) flows out in the horizontal direction, but the flow from the opening portion 17 obliquely to the mainstream smoke 71 with respect to the axis A is observed. The diffused smoke 72 (air flow) on the downstream side of the direction. However, the diffused smoke 72 flowing out of the opening portion 17 is diffused at an angle smaller than a desired angle θ (45°).

A schematic view showing an image showing the degree of diffusion of the smoke of Example 210 is shown in Fig. 37. In the embodiment 210, the depth of the opening portion 17 is 0.82 mm. In Fig. 37, as indicated by a broken line, in the embodiment 210, most of the smoke (mainstream smoke 71) flows out in the horizontal direction, but the flow from the opening portion 17 obliquely to the mainstream smoke 71 with respect to the axis A is observed. A large amount of diffused smoke 72 (air flow) on the downstream side of the direction.

A schematic view showing an image showing the degree of diffusion of the smoke of Example 211 is shown in Fig. 38. In Example 211, the depth of the opening portion 17 was 1.11 mm. As shown by a broken line in Fig. 38, in the embodiment 211, it is observed that, in addition to the mainstream smoke 71 flowing out in the horizontal direction, there is a flow direction from the opening portion 17 obliquely to the main axis of the smoke 71 with respect to the axis A. A large amount of diffused smoke 72 (air flow) on the downstream side. The diffused smoke 72 flowing out of the opening portion 17 is diffused with respect to the axis A at a substantially desired angle θ (45°).

A schematic view showing an image showing the degree of diffusion of the smoke of Example 212 is shown in Fig. 39. In the embodiment 212, the depth of the opening portion 17 is 1.71 mm. In Fig. 39, as indicated by a broken line, in the embodiment 212, it is observed that, besides the mainstream smoke 71 flowing out in the horizontal direction, the flow from the opening portion 17 obliquely to the mainstream smoke 71 with respect to the axis A is also observed. A large amount of diffused smoke 72 (air flow) on the downstream side of the direction. The diffused smoke 72 is diffused with respect to the axis A at an angle substantially equal to or greater than a desired angle θ (45°).

A schematic view showing an image showing the degree of diffusion of the smoke of Example 213 is shown in Fig. 40. In Example 213, the depth of the opening portion 17 was 1.76 mm. In Example 40, as shown by the broken line, in Example 213, almost the same diffusion of smoke as in Example 212 was observed. In embodiment 213 The diffused smoke 72 flowing out of the opening portion 17 is also diffused with respect to the axis A at an angle substantially equal to or greater than a desired angle (45°). According to the observation result of the above smoke, the depth of the opening portion 17 can be sufficiently diffused as long as it is 0.82 mm or more, and more preferably, the depth of the opening portion 17 is set to 1.11 mm or more, and it is desired with respect to the axis A. Angles above the angle (eg, 45°) to spread the smoke. As the upper limit of the depth of the opening portion 17, the bottom portion of the opening portion 17 is a depth as reaching the center of the filter portion 15.

(smoking taste assessment)

The comparative evaluation was carried out by using the cigarette 11 to which the opening portion 17 was not applied as a reference, and the evaluation was carried out on the feeling intensity of the cigarette 11 in which the opening portion 17 was provided in the vicinity of the suction port 22. Using the cigarettes 11 of Examples 201 to 207 shown in Fig. 18 of the cigarettes 11 evaluated here, "the flavor similar to mint" was applied to the tobacco portion 12 and the filter portion 15 in advance. For example, after sucking two cigarettes 11, the intensity of the "like mint flavor" of the evaluation paper is very weak, weak, weak, constant, slightly strong, strong, very strong, etc. compared with the reference. to evaluate. On the evaluation paper, the above-mentioned words are described, and a scale is described adjacent to the above-mentioned words. Each subject evaluated the intensity of "taste like mint" by checking at any position on the scale. The subject was 19 people.

First, as a first process, the result of the subject's check is numerically determined. Specifically, the distance from the end of the scale is measured and the aforementioned intensity is quantified. As a second process, the above values are standardized (normalized) for each subject. As a third process, the dispersion analysis was performed on the numerical values that were standardized for each subject. In this way, you can get Go to the evaluation results shown in Figure 41. In the evaluation results of Fig. 41, the value of + indicates that the meaning of "sweet like mint" is more strongly felt, and the value of - means that the meaning of "sweet like mint" is weaker.

From the taste evaluation result, it is understood that the angle at which the opening portion 17 is formed with respect to the axis A is 30 or more, and is 90 or less, more preferably 45 or more and 70 or less.

According to the fifth embodiment and the examples 201 to 213, the smoking article (cigarette 11) includes the tobacco portion 12, the filter portion 15 having the suction port 22, and the cylindrical covering portion covering the tobacco portion 12 and the filter portion 15. And a plurality of opening portions 17 provided in the covering portion near the suction port 22 and formed at a predetermined angle with respect to the axis A of the filter portion 15.

According to this configuration, since the opening portion 17 is provided in the vicinity of the suction port 22, not only the smoke can flow out from the end surface 22A of the filter portion 15, but also from the opening portion 17. In this way, the smoke in the mouth becomes easy to spread when smoking, and the taste of smoking is further improved. Further, according to the above configuration, the special cigarette cutting step is not required, and the cigarette 11 having the opening portion 17 can be manufactured by a general cigarette machine, and the manufacturing steps can be simplified and the cost can be prevented from being increased. Further, in the cigarette 11 having the above-described configuration, a part of the filter main body 13 is covered with the tipping paper 16 and the wrap paper 14 in the same manner as a general cigarette, so that the problem of deterioration in the quality of the filter fibers during smoking can be prevented. produce.

The angle at which the opening portion 17 forms an axis A is 20° or more and 110° or less. According to this configuration, the smoke can be sufficiently diffused in the oral cavity. In this way, the taste of smoking can be improved. In addition, by the range of the angle The opening portion 17 was provided so that the smoke was sufficiently diffused in the oral cavity, and this phenomenon was confirmed by observation of the smoke of Examples 201 to 207 and image analysis results.

Further, it is more preferable that the angle formed by the opening portion 17 and the axis A is 30 or more and 90 or less. Particularly preferred is 45° or more and 70° or less. According to this configuration, the smoke can be more appropriately diffused in the oral cavity. Within this range, the smoke was sufficiently diffused in the oral cavity, and this phenomenon was confirmed by the observation and image analysis results of the smokes of Examples 201 to 207, and the evaluation results of the smoking tastes for Examples 201 to 207.

The opening portion 17 passes through the cover portion and reaches the filter portion 15. According to this configuration, it is possible to further promote the outflow of the smoke from the opening portion 17. In this way, the spread of smoke during smoking is increased to further enhance the taste of smoking.

The depth of the opening portion 17 is 0.82 mm or more. According to this configuration, the smoke can be diffused in the oral cavity. Within this range, the smoke was sufficiently diffused in the oral cavity as evidenced by the observations of the smokes of Examples 208 to 213.

(Sixth embodiment of smoking articles)

Referring to Fig. 43, a sixth embodiment of a smoking article will be described. The smoking article of the sixth embodiment is a smoking article 53 suitable for use in a non-heated type tobacco-sucking flavor. Here, the differences from the fifth embodiment will be mainly described, and the same portions as those in the fifth embodiment will be denoted by the same reference numerals, and will not be described. In Fig. 43, the upper half of the smoking article 53 is cut by the plane passing through the axis A.

As shown in Fig. 43, the smoking device 53 includes a tobacco portion 12 made of cut tobacco (tobacco); a cylindrical first filter portion 15A and a second The filter portion 15B is adjacent to the tobacco portion 12, and a cylindrical resin cover portion 52 covers the tobacco portion 12, the first filter portion 15A and the second filter portion 15B, and the opening portion 17, which It is provided through the cover 52. The first filter portion 15A has a suction port 22. The cover portion 52 has a suction port 21 at one end portion.

The opening portion 17 is provided in the vicinity of the suction port 22 of the covering portion 52, and is disposed closer to the suction port 22 (suction port 21) at a position 8 mm from the suction port 22 (suction port 21) in the axial direction A of the first filter portion 15A. The location. The plurality of opening portions 17 are, for example, arranged in a ring shape (or radial shape) of one row, or may be arranged in a ring shape of a plurality of rows. The opening portion 17 includes a first portion 17A that is provided to penetrate the cover portion 52 and a second portion 17B that is stopped in the middle of the first filter portion 15A. And set. The opening portion 17 is provided to form an angle θ with the axis A passing through the center of the filter portion 15. The angle at which the opening portion 17 is provided is the same as that of the fifth embodiment.

As is clear from Fig. 43, the basic structure of the smoking device 53 of the sixth embodiment is the same as that of the cigarette 11 of the fifth embodiment shown in Fig. 16. Therefore, in the smoking article 53 of the sixth embodiment, the observation and the image analysis of the same conditions as those of the examples 201 to 213 of the fifth embodiment are carried out, and the same conditions as those of the examples 201 to 207 are carried out. In the case of evaluating the smoking taste in the examples, the same results as in the fifth embodiment were obtained. Further, since the smoke (mainstream smoke, air flow) of the smoking device 53 of the present embodiment is colorless, colored smoke is used for observation and image analysis of the smoke.

According to this embodiment, the fifth embodiment and the real In the same manner as in the examples 201 to 223, the diffusion effect of the smoke in the oral cavity (including the air of the fragrance of the tobacco coming out from the filter portion) can be expected, and the smoking taste can be further improved.

(filter embodiment)

Referring to Fig. 44, an embodiment in which a filter for smoking articles is installed and used will be described. Although the filter 81 is different from the smoking article itself, the structure of the opening portion 17 to be applied is the same as that of the above-described smoking article. Therefore, a part different from the structure of the smoking article of the fifth embodiment will be mainly described, and a common symbol will be added to the portion common to the fifth embodiment. In Fig. 44, the upper half of the filter 81 is cut by a plane passing through the axis A to be displayed.

The filter 81 is detachably attached to a smoking article, and is configured to be detachable from a general cigarette 11 (a cigarette in which the opening portion 17 is not provided). The filter 81 includes a cylindrical portion 82 made of resin attached to one end of the smoking article (cigarette 11), a cylindrical filter portion 15 having a suction port 22 and disposed inside the cylindrical portion 82, and a plurality of The opening portion 17 is provided in the cylindrical portion 82 near the suction port 22.

A plurality of opening portions 17 are provided in the vicinity of the suction port 22 of the filter portion 15. More specifically, the opening portion 17 is provided at a position closer to the suction port 22 (suction port 21) than the suction port 22 (suction port 21) 8 mm in the axial direction A of the filter portion 15. However, the plurality of opening portions 17 are preferably disposed closer to the suction port 22 (suction port 21) than the position 4 mm from the suction port 22 (suction port 21), or more preferably at a distance of 2 mm. It is closer to the position of the suction port 22 (suction port 21). 17 cases of multiple openings For example, it is arranged in a ring shape (or radial shape) of one row, or may be configured as a ring of a plurality of rows. The opening portion 17 includes a first portion 17A that is provided to penetrate the tubular portion 82 and a second portion 17B that is disposed to stop in the middle of the filter portion 15. . The opening portion 17 is provided to form an angle θ with the axis A passing through the center of the filter portion 15. The angle at which the opening portion 17 is provided is the same as that of the fifth embodiment.

As is clear from Fig. 44, the basic structure of the filter 81 of the embodiment and the structure around the filter of the cigarette 11 of the fifth embodiment shown in Fig. 16 (including the filter unit 15, the tipping paper 16, etc.) Construction) is the same. Therefore, the filter 81 of the embodiment is also subjected to observation and image analysis of the same conditions as the examples 201 to 213 of the fifth embodiment, and the same conditions as those of the examples 201 to 207 are carried out. When the smoking taste was evaluated in the middle, the same results as in the fifth embodiment were obtained. Further, in the above observation, analysis, and evaluation, a general cigarette 11 is attached to the filter 81. The smoking conditions are the same as in the fifth embodiment.

In other words, according to the fifth embodiment, as in the fifth embodiment and the examples 201 to 213, the diffusion effect of the air containing the smoke in the oral cavity or the fragrance of the tobacco from the filter unit 15 can be expected. Improve the taste of smoking.

Further, the smoking article (cigarette 11, smoking article 53) and the filter portion 81 are not limited to the above-described embodiments and the respective embodiments, and in the implementation stage, the constituent elements can be added without departing from the spirit thereof. The deformation is embodied. For example, it can also be displayed in the embodiment and the embodiment. All of the constituent elements are deleted, and constituent elements throughout the different embodiments and examples may be combined as appropriate.

An embodiment of a cigarette of an example of a smoking article will be described. In addition, among smoking articles, smoking articles including cigarettes, cigars, hand-rolled cigarettes, cigarillos, tobacco-scented scent that attracts tobacco by electronic device heating or heat source, and smoking articles that attract non-heated tobacco scent (products) Name: Zero Fashion Mint).

(Seventh embodiment of smoking articles)

Hereinafter, a seventh embodiment of a smoking article will be described with reference to Figs. 45 to 50. In Fig. 47, Fig. 49, and Fig. 50, the upper half of the cigarette 11 is cut by the plane passing through the axis A, and the filter portion 15 side is enlarged and displayed. The differences from the first embodiment will be mainly described, and the description of the portions common to the first embodiment will be omitted.

As shown in Figs. 47 and 48, the cigarette 11 as an example of a smoking article includes a tobacco portion 12 which is formed by enclosing a tobacco (tobacco) around a cigarette paper to form a cylindrical shape; a cylindrical filter portion 15, It comprises a winding paper 14 covering the filter body 13 and the periphery of the filter body 13; a tipping paper 16 disposed across the tobacco portion 12 and the filter portion 15; and an opening portion 17 which is wound through the roll The paper 14 and the tipping paper 16 are disposed; the air introduction portion 19 is disposed at a position offset from the vicinity of the suction port 22, and is disposed on the tipping paper 16; and the mixing portion 20 is disposed in the filter portion 15. . In addition, the "position deviated from the vicinity of the suction port 22" in which the air introduction portion 19 is provided can be said to correspond to the axis A side of the filter portion 15. The position near the middle portion and the position corresponding to at least one of the positions of the filter portion 15 on the tobacco portion 12 side.

The tipping paper 16 is coupled to the tobacco portion 12 and the filter portion 15. The tipping paper 16 has a suction port 21 at one end portion, and overlaps the tobacco portion 12 at the other end portion on the opposite side to one end portion. In the present embodiment, the tipping paper 16 is an example of a cylindrical covering portion that covers the tobacco portion 12 and the filter portion 15.

The filter portion 15 is provided adjacent to the tobacco portion 10 at an end portion on the opposite side to the end surface 22A of the suction port 22. The diameter of the filter portion 15 is, for example, 5 mm to 9 mm, for example, 8 mm. Further, the length of the circumference of the filter portion 15 is, for example, 16 mm to 28 mm, for example, 25 mm.

The air introduction portion 19 includes a plurality of vent holes 18 (vent holes, holes) penetrating the tipping paper 16. The air introduction portion 19 is, for example, one row or a plurality of rows (1 or a plurality of rings), and is arranged, for example, at equal intervals, and includes a plurality of vent holes 18 in each row (each ring).

A plurality of vent holes (vent holes, holes) 18 are provided in a range of a predetermined length (width) in the direction of the axis A of the tipping paper 16. This predetermined length differs depending on the number of rows of the vent holes 18 of the respective embodiments. As shown in Fig. 59, when the number of rows (the number of rings) of the vent holes 18 is 4, the predetermined length (width) is, for example, about 2.3 mm. As shown in Fig. 60, when the number of rows (the number of rings) of the vent holes 18 is 1, the predetermined length (width) is larger than the diameter of the holes of the vent holes 18, for example, about 0.5 mm (the number of rows of the vent holes 18 is At 1 o'clock, the position of the vent hole 18 is uneven within the predetermined length, which is caused by manufacturing problems.

The vent hole 18 is, for example, a hole that is provided through the tipping paper 16 or that passes through the tipping paper 16 and the winding paper 14 to reach the hole of the filter portion 15. The vent hole 18 supplies air from the outside into the filter portion 15, and mainly has a function of diluting the smoke (mainstream smoke) flowing in the filter portion 15. The shape of the vent hole 18 may be various shapes such as a circle or a quadrangle.

In the present embodiment, the mixing unit 20 is formed as a cavity provided in the filter unit 15. That is, in this portion, the filter main body 13 (plug) is not present, and only the tipping paper 16 and the winding paper 14 are present. The mixing portion 20 can mix the smoke from the tobacco portion 12 with the air flowing in from the vent holes 18.

The plurality of openings 17 are, for example, arranged in a ring shape (or radial shape) of one row, or may be arranged in a plurality of rows. A plurality of openings, for example, in a circular shape, are arranged at equal intervals, for example. A plurality of opening portions 17 are provided in the vicinity of the suction port 22 of the filter portion 15. More specifically, the plurality of opening portions 17 are provided in the direction of the axis A of the cigarette 11 (filter portion 15), and are disposed closer to the suction port 22 than the suction port 22 (suction port 21) of the filter portion 15 for example, 8 mm. The position of (suction port 21) (within the range of 8 mm from the suction port 22 (suction port 21)). However, the plurality of opening portions 17 are preferably closer to the suction port 22 (suction port 21) than the distance from the suction port 22 (suction port 21) by 4 mm, or more preferably at a distance of 2 mm. Close to the position of the suction port 22 (suction port 21).

Further, in the present embodiment, as an example of the above, a plurality of the opening portions 17 are provided with 37 annular rings in one row. The opening portion 17 includes a first portion 17A and a second portion 17B, wherein the first portion 17A is The second portion 17B is provided in the filter portion 15 (the wound paper 14 and the filter body 13) so as to penetrate through the tipping paper 16.

The method of manufacturing the opening portion 17 is not limited to a laser processing person. For example, a method of punching and punching mechanical properties through a needle-shaped tooth mold (pressing) and an electrical method of transmitting corona discharge may be employed. In the present embodiment, the opening portion 17 is formed in a circular shape, but the shape of the opening portion 17 is not limited. The opening portion 17 is, for example, a circular shape such as a circular shape or an elliptical shape, a polygonal shape such as a triangle, a quadrangle, a rhombus, a parallelogram, a trapezoid, or a cross, or a shape combining the above shapes, or may be the above The shape extends to the mouthpiece 22. Further, the shape of the opening portion 17 may be any direction, or may be arranged by combining a plurality of the opening portions 17 by changing the angle (direction) between the adjacent opening portions 17.

Next, the manufacturing procedure of the cigarette 11 of the present embodiment will be described. First, the tobacco portion 12 (smoke) and the filter portion 15 having a length of two parts are manufactured by a general method. Then, two filter portions 15 having a length of 2 are inserted between the two tobacco portions 12. Further, the rods are joined to form the tobacco portion 12 and the filter portion 15 by using the tipping paper 16 having a length of two portions. Then, while the connected rods are advanced at a predetermined speed, a continuous output beam output from a laser oscillator such as a CO ₂ laser is outputted by a rotary chopper or the like, and is pulsed from the outer circumferential direction of the rod. Irradiate. A vent hole 18 is formed in the tipping paper 16 by the pulsed laser light. At the same time, the first portion 17A of the opening portion 17 is formed in the tipping paper 16 and the winding paper 14 by the pulsed laser light, and the filter body 13 is formed with the second portion 17B having a predetermined depth. Then, the filter unit 15 and the tipping paper 16 are cut by a cutter at a central position of the filter unit 15 having a length of two to produce one cigarette 11.

In addition, the manufacturing method of the opening part 17 is not limited to the above. For example, CO.'S ₂ laser can also be used provided the opening portion 17 is provided, opposite the vent hole 18, can take advantage of the opening portion ₂ after the laser 17 disposed CO.'S vent hole 18 is provided. Further, the tipping paper 17 may be formed by using a CO ₂ laser when the cigarette 11 is manufactured by using the tipping paper 16 provided with the vent hole 18 in advance. Further, the tipping paper 16 provided with the opening portion 17 in advance may be used, and the vent hole 18 may be formed by using a CO ₂ laser when the cigarette 11 is manufactured (in this case, the opening portion 17 is opened only in the tipping paper 16). Further, in other methods, the opening portion 17 may be provided by a CO ₂ laser after the manufacture of a general cigarette. Further, a tipping paper 16 in which a plurality of rows of vent holes 18 are formed by pressing or the like in advance (see FIG. 49) may be used.

The depth of the opening portion 17 was measured in the following manner. The razor is visually cut from directly above the opening portion 17 of the suction port 22 of the filter portion 15, and the filter is cut at the boundary between the deepest portion of the opening portion 17. When the tow of the slit section is colored with a fluorescent pen, the periphery of the opening is colored. Therefore, the portion that is not colored becomes the opening portion 17. The opening portion 17 is enlarged by an optical microscope or a magnifying glass to measure the depth. The depth of the opening portion 17 is arbitrarily measured by 10 opening portions 17, and its arithmetic average is used. The depth of the opening portion 17 is in the range of 1.8 mm to 2.1 mm.

The opening area of the opening portion 17 was measured in the following manner. After the opening portion 17 is formed, the tobacco portion 12 and the filter portion 15 are cut. The filter portion 15 in a state in which the wound paper 14 and the tipping paper 16 are wound is immersed in an aqueous solution of 30% by volume of ethanol and only the tipping paper 16 is separated from the filter portion 15. The separated tipping paper 16 is extended to the prepared sample and allowed to dry. The opening portion was enlarged by an optical microscope, and the area of the opening portion was measured using a soft body of the measurement area of the machine. The area of one opening portion 17 is arbitrarily measured for ten opening portions 17, and the arithmetic mean thereof is used. The area of the opening portion 17 is 0.08 to 0.11 mm ² .

(Examples 301 to 309 of smoking articles, Examples 315, 317, 319, 321, 338, 339,)

The cigarette 11 of Example 301 is shown in Figs. 47 and 48. The cigarette 11 of Example 301 was produced under the conditions of the table shown in Fig. 45. The number of rows of the vent holes 18 is four, and the mixing portion 20 is provided directly below the vent holes 18. That is, in the embodiment 301, the mixing portion 20 is provided at a position overlapping the air introduction portion 19 (vent hole 18) in the direction of the axis A.

The embodiments 302 to 304 have substantially the same configuration as the cigarette 11 of the embodiment 301, and thus the individual illustrations are omitted. The cigarettes 11 of Examples 302 to 304 were produced under the conditions of the table shown in Fig. 45. The number of rows of the vent holes 18 is four, and the mixing portion 20 is provided directly below the vent holes 18. The length of the mixing portion 20 in the direction of the axis A is Example 301 <Example 302 <Example 303 <Example 304. In the embodiments 302 to 304, the mixing portion 20 is provided at a position overlapping the air introduction portion 19 (vent hole 18) in the direction of the axis A.

The cigarette 11 of Example 305 is shown in Fig. 49. Implementation The cigarette 11 of Example 305 was produced under the conditions of the table shown in Fig. 45. The number of rows of the vent holes 18 is four. The mixing portion 20 is provided in the rear portion of the vent hole 18 (air introduction portion 19), that is, on the downstream side (the suction port 22 side) of the vent hole 18. Further, in other words, the position of the mixing portion 20 is at a position between the vent hole 18 and the suction port 22.

The embodiment 319, 321 has substantially the same configuration as the cigarette 11 of the embodiment 305, and the individual illustrations are omitted. The cigarettes 11 of Examples 319 and 321 were produced under the conditions of the table shown in Fig. 46. The number of rows of the vent holes 18 is 1 or 4, and the mixing portion 20 is provided in the rear portion of the vent holes 18 (air introduction portion 19), that is, in the downstream of the vent holes 18 (the side of the suction port 22). The length of the mixing portion 20 in the direction of the axis A is Example 319 <Example 305 <Example 321 Further, under the condition that the mixing portion 20 is provided on the downstream side of the vent hole 18, the length of the mixing portion 20 in the direction of the axis A is 2 mm or more, and can be appropriately set within a range of 20 mm or less.

The cigarette 11 of Example 306 is shown in Fig. 50. The cigarette 11 of Example 306 was produced under the conditions of the table shown in Fig. 45. The number of rows of the vent holes 18 is 1, and the mixing portion 20 is provided directly below the vent holes 18. That is, in the embodiment 306, the mixing portion 20 is provided at a position overlapping the air introduction portion 19 (vent hole 18) in the direction of the axis A.

The examples 307 to 309 have substantially the same configuration as the cigarette 11 of the embodiment 306, and the individual illustrations are omitted. The cigarettes 11 of Examples 307 to 309 were produced under the conditions of the table shown in Fig. 45. The number of rows of the vent holes 18 is 1, and the mixing portion 20 is provided directly below the vent holes 18. The length of the mixing portion 20 in the direction of the axis A is the embodiment 306 < Example 307 <Example 308 <Example 309. In the embodiments 307 to 309, the mixing portion 20 is provided at a position overlapping the air introduction portion 19 (vent hole 18) in the direction of the axis A.

The embodiment 315, 338, 317, 339 has substantially the same configuration as the cigarettes 11 of the embodiments 307 to 309, and the individual illustrations are omitted. The cigarettes 11 of Examples 315, 338, 317, 339 were produced under the conditions of the table shown in Fig. 46. The number of rows of the vent holes 18 is 1 or 2, and the mixing portion 20 is provided directly below the vent holes 18. The aeration rates of Examples 315, 317 are, for example, 50% or less, and the ventilation rates of Examples 338, 339 are, for example, 20 or less. In the embodiment 3, 338, 317, 339, the mixing portion 20 is provided at a position overlapping the air introduction portion 19 (vent hole 18) in the direction of the axis A.

(Eighth embodiment of smoking articles)

Next, an eighth embodiment of a smoking article will be described with reference to Figs. 51 to 54. The difference from the seventh embodiment will be mainly described, and the description of the portions common to the seventh embodiment will be omitted.

As shown in Fig. 51, the cigarette 11 which is an example of a smoking article includes a tobacco portion 12 which is formed into a cylindrical shape by surrounding the tobacco (tobacco) with a cigarette paper, and a cylindrical filter portion 15 which is A wrapping paper 14 covering the periphery of the filter body 13 and the filter body 13 is included; a tipping paper 16 is disposed across the tobacco portion 12 and the filter portion 15; and an opening portion 17 for piercing the winding paper 14 And the tipping paper 16 is provided; the air introduction portion 19 is provided at the position deviated from the vicinity of the suction port 22, and is provided on the tipping paper 16; and the resistance portion 61 is provided at the center of the filter portion 15, for example Near, while giving ventilation resistance. In the present embodiment, the center of the filter portion 15 is, for example, a center in a direction (so-called radial direction) that intersects the direction of the axis A. In the present embodiment, the tipping paper 16 is an example of a cylindrical covering portion that covers the tobacco portion 12 and the filter portion 15.

The tipping paper 16 is coupled to the tobacco portion 12 and the filter portion 15. The tipping paper 16 has a suction port 21 at one end portion, and overlaps the tobacco portion 12 at the other end portion on the opposite side to the one end portion.

The air introduction portion 19 includes a plurality of vent holes 18 (vent holes, holes) penetrating the tipping paper 16. The air introduction portion is, for example, one row or a plurality of rows (1 or a plurality of rings), and is arranged, for example, at equal intervals, and includes a plurality of vent holes 18 in each row (each ring).

The filter portion 15 is provided adjacent to the tobacco portion 12 at an end portion on the opposite side of the end surface 22A of the suction port 22. The diameter of the filter portion 15 is, for example, 8 mm. In the present embodiment, the portion of the filter portion 15 that is disposed around (outside) the resistance portion 61 is used to mix the smoke from the tobacco portion 12 and the air from the air introduction portion 19 (vent hole 18). Mixing section 20. The configuration of the mixing unit 20 is the same as that of the other portions of the filter unit 15.

The plurality of vent holes 18 are provided in a range of a predetermined length (width) of the axial direction of the tipping paper 16. This predetermined length differs depending on the number of rows of the vent holes 18 of the respective embodiments. In the present embodiment, the number of rows (the number of rings) of the vent holes 18 is 1, and as shown in Fig. 60, the predetermined length (width) is, for example, 0.5 mm.

As shown in Fig. 51, the vent hole 18 is, for example, a water penetrating The hole provided in the manner of the loose paper 16 or the hole passing through the tipping paper 16 and the winding paper 14 reaches the filter portion 15.

The plurality of opening portions 17 are, for example, arranged in a ring shape (or radial shape) of one row, but may be arranged in a ring shape of a plurality of rows. A plurality of, for example, circular opening portions 17 are arranged at equal intervals in each row. A plurality of opening portions 17 are provided in the vicinity of the suction port 22 of the filter portion 15. More specifically, the plurality of opening portions 17 are provided in the direction of the axis A of the cigarette 11 (filter portion 15), and are disposed closer to the suction port 22 than the suction port 22 (suction port 21) of the filter portion 15 for example, 8 mm. The position of (suction port 21) (within the range of 8 mm from the suction port 22 (suction port 21)). However, the plurality of opening portions 17 are preferably closer to the suction port 22 (suction port 21) than the distance from the suction port 22 (suction port 21) by 4 mm, or more preferably, closer to the suction port than the position 2 mm. 22 (intake port 21) position. Further, in the present embodiment, as an example of the above, a plurality of the opening portions 17 are provided in a ring shape of 37 lines.

The resistance portion 61 is formed, for example, by a string made of cotton, which leads to the inside of the filter portion 15. In addition, the resistance portion 61 is not limited to the cotton string, and for example, a filler such as cellulose acetate (cellulose-based semi-synthetic fiber) may be densified or compressed to set the flow path resistance. It is higher than the general filter portion 15 (refer to Embodiment 336). That is, it is not limited to the material that is imparted to the resistance portion 61. The diameter of the resistance portion 61 is set to be in the range of 1 mm to 5 mm in Examples 310 to 314 and Example 336 which will be described later with respect to the diameter of the filter portion 15 of 8 mm. Since the resistance portion 61 is less likely to penetrate the smoke and the air, the smoke from the tobacco portion 12 and the air from the air introduction portion 19 mainly flow to the resistance portion. The mixing portion 20 around 61.

(Example 310 of the smoking article to Example 314, Example 336)

The cigarette 11 of Example 310 is shown in Fig. 51. The cigarette 11 of Example 310 was produced under the conditions of the table shown in Fig. 45. The number of rows of vent holes 18 is one. A string as the resistance portion 61 is provided at the center of the filter portion 15. The diameter of the string is 1 mm. The string to be applied to the resistance portion 61 is provided so as to extend in the direction of the axis A from the position overlapping the air introduction portion 19 (vent hole 18) to the suction port 22. The mixing portion 20 is provided around (outside) the resistance portion 61. The ventilation resistance given to the resistance portion 61 is several times to several tens of times higher than the ventilation resistance of the mixing portion 20. Further, the symbol of the FTF in Fig. 45 refers to the FTF filter, and the filter of the string is disposed in the core portion.

The embodiment 311 has substantially the same structure as the cigarette 11 of the embodiment 310, and thus the illustration thereof is omitted. The cigarette 11 of Example 311 was produced under the conditions of the table shown in Fig. 45. The number of rows of the vent holes 18 is one. The diameter of the string is 3.1 mm. The string to be applied to the resistance portion 61 extends from the position overlapping the air introduction portion 19 (vent hole 18) to the suction port 22 in the direction of the axis A. The mixing portion 20 is provided around (outside) the resistance portion 61. The ventilation resistance given to the resistance portion 61 is several times to several tens of times higher than the ventilation resistance of the mixing portion 20.

The cigarette of Example 312 is shown in Fig. 52. The cigarette 11 of Example 312 was produced under the conditions of the table shown in Fig. 45. The number of rows of the vent holes 18 is one. The diameter of the string is 5mm. The string to be applied to the resistance portion 61 is in the direction of the axis A from the air introduction portion 19 (vent hole 18). The overlapping positions extend throughout the mouthpiece 22. The mixing portion 20 is provided around (outside) the resistance portion 61. The ventilation resistance given to the resistance portion 61 is several times to several tens of times higher than the ventilation resistance of the mixing portion 20. The bottom of the opening portion 17 reaches the string as the resistance portion 61.

The embodiment 336 has substantially the same configuration as the cigarette 11 of the embodiment 312, and thus the individual illustrations are omitted. The cigarette 11 of Example 336 was produced under the conditions of the table shown in Fig. 46. The number of rows of the vent holes 18 is one. The core portion (resistance portion) to which the resistance portion 61 is applied is composed of a filler (acetic acid fiber or the like) having a higher density than a portion (mixing portion 20) around the filter portion 15. The number of fibers of the filler to be applied to the resistance portion 61 is larger than the number of fibers of the filler of the mixing portion 20, and the thickness of the fibers of the filler applied to the resistance portion 61 is larger than the thickness of the fibers of the filler of the mixing portion 20. Big. Therefore, the ventilation resistance given to the resistance portion 61 is several times to several tens of times higher than the ventilation resistance of the mixing portion 20. The diameter of the resistance portion 61 is set to 4 mm. The resistance portion 61 is provided in the axis A direction from the position where the air introduction portion 19 (the vent hole 18) overlaps the suction port 22.

The cigarette of Example 313 is shown in Fig. 53. The cigarette 11 of Example 313 was produced under the conditions of the table shown in Fig. 45. The number of rows of the vent holes 18 is one. The diameter of the string is 3.1 mm. The string to which the resistance portion 61 is applied is located at a position overlapping the air introduction portion 19 (vent hole 18) in the direction of the axis A, and at a position further upstream than the suction port 22 (a position substantially in the middle of the vent hole 18 and the suction port 22) ). The mixing portion 90 is provided around (outer) the resistance portion 61.

The cigarette 11 of Example 314 is shown in Fig. 54. Implementation The cigarette 11 of Example 314 was produced under the conditions of the table shown in Fig. 45. The number of rows of the vent holes 18 is one. The diameter of the string is 3.1 mm. The string to be applied to the resistance portion 61 extends from the position on the upstream side of the suction port 22 (a position substantially in the middle of the vent hole 18 and the suction port 22) to the suction port 22. The mixing portion 20 is provided around (outside) the resistance portion 61.

(Comparative Example 301 to Comparative Example 305, Comparative Example 306, 308 of smoking articles)

In addition to the examples 301 to 309 of the eighth embodiment and the examples 310 to 314 of the ninth embodiment, the inventors prepared the cigarette 11 of the comparative example under the conditions of the tables of the 45th and 46th drawings. .

The cigarette 11 of Comparative Example 301 is shown in Fig. 55. The number of rows of the vent holes 18 is four.

The cigarette 11 of Comparative Example 302 is shown in Fig. 56. The number of rows of the vent holes 18 is one.

The comparative examples 303 to 305 and the comparative examples 306 and 308 are similar to the comparative examples 301 and 302, and thus the illustration thereof is omitted. In the cigarette 11 of Comparative Example 303, the number of rows of the vent holes 18 was two. In the cigarette 11 of Comparative Example 304, the number of rows of the vent holes 18 was 1. In the cigarette 11 of Comparative Example 305, the vent hole 18 was not provided.

(Measurement device for air ratio: first measuring device)

Referring to Fig. 57, the first measuring device 24 for measuring the ratio of the air passing through the opening portion 17 and the air passing through the suction port 22 of the filter 15 will be described. The first measuring device 24 includes an air flow path separating fixing device 25, a first film flow meter 26, a second film flow meter 27, a first valve 31 adjacent to the first film flow meter 26, and a second film flow meter. 27 adjacent The second valve 32; the pump 33 (suction pump) sucks air from the air flow path separating fixture 25; and the exhaust unit 34 discharges the exhaust gas from the pump 33. At the upstream side of the pump 33, a damper for preventing the pulsation of the pump 33 is provided. In addition, the suction flow rate of the pump 33 is controlled by a mass flow controller and at a flow rate of 1050 ml/min.

The air flow path separating and fixing device 25 has a first portion 35 (small chamber) that is disposed at a position far from the cigarette 11 so as to discharge smoke (air) flowing out from the end surface 22A of the filter portion 15; The portion 36 (small chamber) is disposed close to the cigarette 11 so as to discharge the smoke flowing out from the second portion 17B and the opening portion 17 of the filter portion 15, and the first seal 37 is provided in the first portion 35 and The position between the second portion 36 and the second seal 38 are provided so as to be in contact with the tipping paper 16 of the cigarette 11. The pipe extending from the first portion 35 and the second portion 36 merges on the downstream side and is connected to the pump 33.

The first measuring device 24 is adjusted such that the values of the first membrane flowmeter 26 and the second membrane flowmeter 27 are 525 ml/min, respectively, in a state in which the measuring cigarette is not inserted. The cigarettes 11 of the examples 301 to 314 and the comparative examples 301 to 305 are inserted, and the flow rate of the end surface 22A passing through the filter portion 15 and the passage portion 17 are passed by the first membrane flowmeter 26 and the second membrane flowmeter 27. The flow rate is measured. Further, in the cigarettes 11 of the embodiments 301 to 314 and the comparative examples 301 to 305, for example, an extension cylinder portion 41 is provided at the suction port 21, and the extension cylinder portion 41 is a tube having a bonding layer on one side. Made in the shape of. The extension cylinder portion 41 guides the air passing through the end surface 22A of the filter portion 15 to the first portion 35.

The respective measured values are calculated by the ratio F _air of the air flow rate of the opening portion 17 defined by the following formula (1). Here, Q _air1 passes through the air flow rate of the end face 22A of the filter suction port 22, and Q _air2 passes through the air flow rate of the opening portion 17. Further, the measured value is an arithmetic average of 10 cigarettes 11. The measurement results of F _air are shown in the tables of Figs. 45 and 46.

(Measurement device for coarse tar amount: second measuring device)

Referring to Fig. 58, a second measuring device 62 that measures the ratio of the amount of crude tar flowing out of the opening portion 17 will be described. The second measuring device 62 includes a smoke flow path separating fixing device 63 and a linear type smoker 64. The smoke flow path separation fixing device 63 has a first small chamber 65 which is disposed at a position far from the cigarette 11 and a second small chamber 66 which is disposed near the cigarette 11 so as to discharge the smoke flowing out of the opening portion 17. The third sealing member 67 is provided between the first small chamber 65 and the second small chamber 66, and the fourth sealing member 68 is provided so as to be in contact with the tipping paper 16 of the cigarette 11.

Each chamber is connected to each of the smoking connection holes on the linear smoker. 2 total suction flow rate of the small chamber is set to be based 35.0mL / 2.0 seconds, and is connected to the suction capacity of the second chamber 66 of the smoking system of the connection hole in a manner equal to the air through the opening portion 17 of the flow rate ratio F _air set up.

The cigarettes of the respective examples and the comparative examples were inserted. The crude tar flowing out from the end surface 22A of the filter portion 15 and the crude tar flowing out from the opening portion 17 are recovered by a Cambridge filter attached to each chamber, and are separately measured using an electronic balance. Further, in the cigarette 11, the same elongated tubular portion 41 as described above is provided.

The amount of crude tar recovered is from the total weight of the Cambridge filter after the smoking test and the Cambridge filter seat to be maintained, and the total weight of the Cambridge filter and the Cambridge filter seat before the smoking test. Calculate by subtracting. Further, the ratio F _{smoke of the} amount of the crude tar flowing out from the opening portion 17 defined by the formula (2) can be calculated from the respective measured values. Here, Q _smoke1 is the weight of the crude tar flowing out from the end face 22A of the suction port 22 of the filter portion 15, and Q _smoke2 is the weight of the crude tar flowing out from the opening portion 17. Further, as an index of the concentration of the smoke flowing out from the opening portion 17, R defined by the formula (3) is used. The measurement results of _smoke and R are shown in the tables of Figs. 45 and 46. When R is a number in the vicinity of 0.5 to 1, it is presumed that smoke of a general concentration flows out of the opening portion 17.

(Review of test results)

First, referring to Fig. 63, regarding the comparative examples 301 to 305, the relationship between the ventilation rate (Vf%) and R is reviewed. In the comparative example 305, the ventilation rate (introduction of the total flow rate of the flow rate of the smoke from the tobacco portion 12 of the suction port 22 and the air flowing in from the air introduction portion 19 (vent hole 18) is introduced from the air. The ratio of the flow rate of the air flowing into the portion 19 was 0%, F _smoke was 62.6%, and R was 1.08. In Comparative Example 304, the aeration rate was 26.2, F _{smoke was} 36.8, and R was 0.701. In Comparative Example 304, it was found that the outflow of the crude tar from the opening portion 17 was suppressed, and the smoke became slightly thin. Further, in Comparative Example 303, the aeration rate was 52.3%, F _{smoke was} 22.8, and R was 0.39. In Comparative Example 303, it is understood that the concentration R of the smoke flowing out of the opening portion 17 is 1/2 or less as compared with the case where the vent hole 18 is not provided. In Comparative Examples 301, 302 in which the ventilation rate was increased, the value of R was further reduced (refer to Fig. 63).

Next, in the embodiment (the seventh embodiment, the examples 301 to 305) in which the mixing unit 20 belonging to the cavity is provided in the filter unit 15, it is checked whether or not the ventilation rate is lowered. The results of the review are shown in Figure 61. As is clear from Fig. 61, as shown in Examples 301 to 305, when the mixing portion 20 is provided, the ventilation rate is not affected. In Examples 301 to 305, the ventilation rate of any of them was 50% or more.

In the same manner as in the embodiment (the eighth embodiment, the examples 310 to 314) in which the resistance portion 61 (string) is provided in the filter portion 15, it is checked whether or not the ventilation rate is lowered. The results of the review are shown in Figure 62. As is clear from Fig. 62, as shown in Examples 310 to 314, when the resistance portion 61 is provided, the ventilation rate is not affected. In Examples 310 to 314, the ventilation rate of any of them was 50% or more.

Further, in the embodiment in which the mixing portion 20 belonging to the cavity is provided in the filter portion 15, when the vent holes are four rows (Example 301 to 305) Review the relationship between the length of the mixing portion 20 in the direction of the axis A and R. The results of the review are shown in Figure 64. As a result, it is understood that the concentration R of the smoke flowing out of the opening portion 17 increases as the length of the mixing portion 20 increases. When the length of the mixing portion 20 is increased from 3.0 mm to 4.0 mm, it is known that the concentration R of the smoke rapidly increases, and is almost constant at 4.0 mm or more.

On the other hand, as shown in Example 305, when the position of the mixing portion 20 is between the vent hole 18 and the suction port 22, although the length of the mixing portion 20 in the direction of the axis A is 8.0 mm, the concentration R of the smoke is 0.381. Therefore, as compared with the case where the mixing portion 20 and the vent hole 18 are overlapped (Examples 301 to 304), it is known that the concentration R of the smoke flowing out from the opening portion 17 is low.

Similarly, when the mixing portion 20 belonging to the cavity is provided in the filter portion 15, and the airflow is one line (Examples 306 to 309), the relationship between the length of the mixing portion 20 in the direction of the axis A and R is checked. The results of the review are shown in Figure 65. As a result, it is understood that the concentration R of the smoke flowing out of the opening portion 17 increases as the length of the mixing portion 20 increases. When the length of the mixing portion 20 is increased from 2.0 mm to 3.0 mm, it is known that the concentration R of the smoke rapidly increases, and it becomes almost constant at 3.0 mm or more.

Further, a total of the results of the fact that the vent hole 18 is four rows and the vent hole 18 is one row is summarized, and the number of rows of the vent holes 18 is not normalized. Here, the relationship between the value of L and the R defined below is reviewed.

L = (length of the mixing portion 20 (void)) - (width of the vent hole 18 (Vf width))

Here, the length of the mixing portion 20 (cavity) is the length in the direction of the axis A. The width of the vent hole 18 means that the aforementioned axis A is provided. The predetermined length of the plurality of vents 18 in the direction.

The results of the review are shown in Figure 66, Figure 67, and Figure 70. Fig. 67 is an enlarged view showing the position of L of Fig. 66 from 0 mm to 2 mm. According to Fig. 66 and Fig. 67, when the L is between 0 mm and 1 mm, the concentration R of the smoke rapidly increases. Then L becomes almost unchanged at 1.5 mm or more. This means that (1) shortly after the air flows in from the vent hole 18, the air and the smoke are not sufficiently mixed, and a mixing section is required in addition to the width of the vent hole 18, and (2) as the mixing section, a length of about 1 mm is required (preferably R is 0.5 or more, more preferably R is 0.8 or more, refer to Fig. 67), and does not depend on the number of rows of the vent holes 18.

In Fig. 70, the relationship between L and the concentration R of smoke is shown for each ventilation rate. The approximate curve of the dotted line is 80% for the ventilation rate (Vf), the approximate curve for the one-point chain is approximately 50% for the ventilation rate (Vf), and the ventilation rate (Vf) for the double-point chain system is approximately 20%. According to Fig. 70, it can be seen that the concentration R of the smoke rapidly increases between 0 mm and 1 mm, depending on the ventilation rate. Then L becomes almost unchanged at 1.5 mmm or more.

Finally, an embodiment in which the resistance portion 61 is provided in the filter portion 15 is reviewed. First, the relationship between the position at which the resistance portion 61 (string) is provided and R is reviewed. The results of the review are shown in Figure 68. The value of R in the embodiment 311 where the resistance portion 61 is provided from the position overlapping the vent hole 18 is the highest (R = 0.397), and then the resistance portion 61 is provided from the upstream side of the suction port 22 (passing) The position of R between the air hole 18 and the suction port 22), the value of R throughout the embodiment 314 of the suction port 22 is immediately after (R=0.321), and secondly, the resistance portion 61 is given and ventilation. The value of R of Example 313 where the holes 18 overlap each other to a position on the upstream side of the suction port 22 (a position substantially in the middle of the vent hole 18 and the suction port 22) is immediately after (R = 0.270).

In the examples 311, 313, and 314, it is understood that the value of R which is higher than the case where the resistance portion 61 is not provided (that is, the value on the approximate straight line which is produced by the values of the comparative examples 301 to 305 shown in Fig. 68) is not provided. The R value is improved by giving the setting of the resistance portion 61.

Next, the relationship between the diameter of the resistance portion 61 and R is reviewed. The results of the review are shown in Figure 69. In the embodiments 310, 311, and 312 described below, the string to be applied to the resistance portion 61 extends from the position overlapping the air introduction portion 19 (vent hole 18) in the direction of the axis A to the suction port 22. In Example 310 in which the diameter of the resistance portion 61 (string) was 1.0 mm, R was 0.145, and the value of R was in the vicinity of the approximate straight line which was produced by the values of Comparative Examples 301 to 305. On the other hand, in the example 311 in which the diameter of the resistance portion 61 (the string) was increased to 3.1 mm, it was found that the concentration R of the smoke was 0.397, and the R value was increased by the resistance portion 61. Further, when the diameter of the resistance portion 61 (string) was increased to 5.0 mm (Example 312), it was found that R became 0.862, which was remarkably increased. When the diameter of the resistance portion 61 was 4.0 mm (Example 336), R was 0.757, and the R value was also improved a lot.

Further, in the embodiment 312, the bottom portion of the opening portion 17 is provided in the string belonging to the resistance portion 61. In the case where the R of the embodiment 312 is remarkably increased, it is presumed that the penetration of the opening portion 20 through the opening portion 17 suppresses the influence of the flow of smoke and air in the direction of the axis A.

As a result of the above review, the diameter of the resistance portion 61 is preferably 4 mm or more. In other words, the diameter (8 mm) of the filter portion 15 is preferably 50% or more in terms of the ratio of the diameter of the resistance portion 61. Further, in other words, it is preferable that the bottom portion of the opening portion 17 reaches the resistance portion 61.

From the above review results, it is preferable to use the following components for smoking articles.

The smoking article includes: a tobacco portion 12; a filter portion 15 having a suction port 22; a cylindrical covering portion covering the tobacco portion 12 and the filter portion 15; and a plurality of opening portions 17 provided in the vicinity of the suction opening 22 The air introduction portion 19 is provided at the cover portion at a position deviated from the vicinity of the suction port 22, and the mixing portion 20 is provided in the filter portion 15, and the smoke from the tobacco portion 12 and the air introduction portion 19 are provided. The air is mixed.

According to this configuration, by providing the mixing unit 20, the air flowing in from the air introduction portion 19 and the smoke from the tobacco portion 12 can be appropriately mixed. By this means, for example, it is possible to prevent the concentration of the smoke flowing out from the opening portion 17 which is produced by efficiently diffusing the smoke in the oral cavity to be extremely thin. In this way, the desired smoke diffusion effect can be obtained in the oral cavity.

The mixing portion 20 is a cavity provided in the filter portion 15. According to this configuration, the configuration of the mixing unit 20 can be achieved simply and inexpensively. In addition, it is possible to carry out continuous manufacturing using a general cigarette machine, which is advantageous for industrial use. Therefore, the concentration of the smoke flowing out of the opening portion 17 can be effectively prevented from being greatly changed without changing the existing tobacco manufacturing equipment.

The mixing portion 20 is disposed in the direction of the axis A with the air guide The position where the entrance portion 19 overlaps. According to this configuration, the smoke from the tobacco portion 12 and the air flowing in from the air introduction portion 19 can be efficiently mixed. In this way, the concentration of the smoke flowing out of the opening portion 17 can be prevented from becoming low.

The air introduction portion 19 includes a plurality of holes penetrating the cover portion, and the plurality of holes are provided in a range of a predetermined length in the direction of the axis A of the cover portion, and the length of the mixing portion 20 from the direction of the axis A is decreased by the aforementioned predetermined length. The value is above 1.0 mm. From the results of the above review, it can be seen that there must be some degree of distance from the time when the smoke merges with the air and until it is mixed. According to this configuration, in the mixing unit 20, it is possible to ensure a sufficient distance (R is approximately 0.8) between the smoke from the tobacco portion 12 and the air from the hole of the air introduction portion 19. In this way, it is possible to effectively prevent a decrease in the concentration of the smoke flowing out of the opening portion 17. Further, the value of the predetermined length from the length of the mixing portion 20 in the direction of the axis A is substantially smaller than the total length of the filter portion 15.

The value of the length of the mixing portion 20 from the axis A direction minus the predetermined length is 1.5 mm or more. According to this configuration, in the mixing unit 20, the distance between the smoke from the tobacco portion 12 and the air from the hole of the air introduction portion 19 can be sufficiently mixed (R is approximately 0.9 or more). In this way, it is possible to effectively prevent a decrease in the concentration of the smoke flowing out of the opening portion 17.

The mixing portion 20 is provided on the side of the suction port 22 instead of the air introduction portion 19. According to this configuration, the degree of freedom in the installation position of the mixing unit 20 can be improved. Further, the length of the mixing portion 20 in the direction of the axis A of the filter portion 15 is 2 mm or more and 20 mm or less. According to this configuration, it is comparable to the smoking article (for example, Comparative Example 306) in which the mixing portion 20 is not provided. The R value is slightly improved. Therefore, in order to improve the R value, it is useful to provide the mixing portion 20 on the side of the suction port 22 rather than the air introduction portion 19 within the above range.

The smoking article is provided with a resistance portion 61 for imparting ventilation resistance in the vicinity of the center of the filter portion 15, and the mixing portion 20 is provided outside the resistance portion 61 of the filter portion 15. According to this configuration, the resistance from the tobacco portion 12 can be prevented from being deflected toward the center of the filter portion 15 by the resistance portion 61. In this manner, the smoke from the tobacco portion 12 and the air from the holes of the air introduction portion 19 can be efficiently mixed in the mixing portion 20 provided around the resistance portion 61.

The resistance portion 61 is provided to extend to the suction port 22 from a position overlapping the air introduction portion 19 in the direction of the axis A. According to this configuration, the smoke from the tobacco portion 12 is not biased toward the center of the filter portion 15 at any portion from the position where the air introduction portion 19 overlaps the suction port 22, and the concentration of the smoke flowing out from the opening portion 17 can be prevented. reduce.

The diameter of the resistance portion 61 is 50% or more of the diameter of the filter portion 15. According to this configuration, the smoke from the tobacco portion 12 and the air from the holes of the air introduction portion 19 can be efficiently mixed in the mixing portion 20 (R is approximately 0.75 or more). In this way, the concentration of the smoke flowing out of the opening portion 17 can be prevented from decreasing.

The ratio of the flow rate of the air flowing in from the air introduction portion 19 is 50 or more with respect to the total flow rate of the flow rate of the smoke from the tobacco portion 12 of the suction port 22 and the air flowing in from the air introduction portion 19. According to this configuration, in the so-called high Vf (high air permeability) product, The concentration of the smoke flowing out of the opening portion 17 can be prevented from becoming thin. Further, the vent hole 18 is mainly used as a means for lowering the tarification of the cigarette 11, and is used in many low tar products.

The smoking article is not limited to the above-described embodiments and the respective embodiments, and may be embodied as a component change without departing from the spirit of the invention in the implementation stage. For example, in the seventh embodiment, a particulate matter such as activated carbon or various kinds of capsules (for example, capsules containing menthol and mint flavor) may be disposed inside the mixing unit 20 composed of a cavity. Further, some constituent elements may be deleted from all the constituent elements shown in the embodiments and the examples, and the constituent elements of the different embodiments and the entire embodiments may be combined as appropriate.

11‧‧‧ Cigarettes

12‧‧ ‧Tobacco Department

13‧‧‧Filter body

14‧‧‧ Winding paper

15‧‧‧Filter Department

16‧‧‧Pin paper

17‧‧‧ Openings

17A‧‧‧Part 1

17B‧‧‧Part 2

18‧‧‧Ventinel

21‧‧‧Inhalation

22‧‧‧ mouthpiece

22A‧‧‧ end face

A‧‧‧Axis direction

Claims (25)

A smoking article comprising: a tobacco portion; a filter portion having a suction port; a cylindrical covering portion covering the tobacco portion and the filter portion; and a plurality of opening portions for diffusing smoke in the oral cavity, It is provided in the cover portion in the vicinity of the suction port. The smoking article according to claim 1, wherein the opening portion penetrates the covering portion and reaches the filter portion. The smoking article according to claim 2, wherein the plurality of openings are disposed at a position closer to the suction port than a position of 8 mm from the suction port in an axial direction of the filter portion. The smoking article according to claim 3, wherein the plurality of opening portions are provided at a predetermined angle with respect to an axis of the filter portion. The smoking article according to claim 4, wherein the angle between the opening portion and the axis of the filter portion is 20° or more and 110° or less. The smoking article according to claim 5, wherein the opening portion forms an angle with the axis of 30° or more and 90° or less. The smoking article according to claim 6, wherein the opening portion forms an angle with the axis of 45° or more and 70° or less. Smoking as described in any one of claims 5 to 7 In the article, the depth of the opening portion is 0.82 mm or more. The smoking article according to claim 3, further comprising: an air introduction portion provided at a position offset from a vicinity of the suction port, and a mixing portion provided in the filter portion The smoke from the tobacco portion is mixed with the air from the air introduction portion. The smoking article according to claim 9, wherein the mixing portion is a cavity provided in the filter portion. The smoking article according to claim 10, wherein the mixing portion is provided at a position overlapping the air introduction portion in an axial direction of the filter portion. The smoking article according to claim 11, wherein the air introduction portion includes a plurality of holes penetrating the cover portion, and the plurality of holes are provided within a predetermined length of the axial direction of the cover portion Further, the value of the predetermined length from the length of the aforementioned mixing portion in the axial direction is 1.0 mm or more. The smoking article according to claim 12, wherein a value obtained by subtracting the predetermined length from the length of the mixing portion in the axial direction is 1.5 mm or more. The smoking article according to claim 10, wherein the mixing portion is disposed closer to the suction port side than the air introduction portion. The smoking article of claim 14, wherein the foregoing The length of the mixing portion in the axial direction of the filter portion is 2 mm or more and 20 mm or less. The smoking article according to claim 9, wherein a resistance portion for imparting a ventilation resistance is provided in the vicinity of a center of the filter portion, and the mixing portion is located outside the resistance portion of the filter portion. The smoking article according to claim 16, wherein the resistance imparting portion extends over the suction port from a position overlapping the air introduction portion in the axial direction. The smoking article according to claim 16, wherein the diameter of the resistance portion is 50% or more of the diameter of the filter portion. The smoking article according to claim 16, wherein the bottom portion of the opening portion reaches the resistance imparting portion. The smoking article according to claim 3, wherein a flow rate of the air flow flowing out from the opening portion is proportional to a total flow rate of the air flow flowing out from the end surface of the filter portion and the opening portion 2.8% or more and 68.9% or less. The smoking article of claim 1, wherein the covering portion is tipping paper. The smoking article according to claim 1, wherein the covering portion is formed of a resin material. a smoking article having: a tobacco department; The filter portion has a suction port, a cylindrical covering portion covering the tobacco portion and the filter portion, and an exposed portion for diffusing smoke in the oral cavity, and the cover portion is provided in the vicinity of the suction port. A filter comprising: a tubular portion mounted at one end of a smoking article; a filter portion having a suction opening and disposed inside the tubular portion; and a plurality of openings for diffusing smoke in the oral cavity a portion that is disposed in the tubular portion near the suction port. The filter according to claim 24, wherein the plurality of openings are provided at a predetermined angle with respect to an axis of the filter portion.