TW201424609A - Smoking article and filter - Google Patents

Abstract

A smoking article including: a tobacco section 12; a filter section 15 which is disposed adjacent to the tobacco section 12 and has an end surface opposite to the tobacco section 12; and a plurality of pores section 17 which is provided in the filter section 15 in the manner of being exposed at the end surface 22A to the external, and inclined relative to a central axis A of the filter section 15 such that it is gradually separated away from the center axis A of the filter section 15 as it approaches to the end surface 22A.

Description

Smoking items, filters

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

For example, a filter head for tobacco has been disclosed in which the end portion of the mouth of the cylindrical filter head is chamfered. When the filter head for tobacco is smoked, the smoke flows out perpendicularly to the inclined surface, and the effect of improving the smoking taste is produced (for example, refer to Patent Document 1).

Advanced technical literature

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

However, in the above-described conventional filter head for tobacco, the step of chamfering the end portion of the filter head at the end of the manufacturing step is required, so that a special processing device is required, and the manufacturing efficiency is deteriorated. .

A smoking article according to one aspect of the present invention includes: a tobacco portion; a filter portion disposed adjacent to the tobacco portion and having an end surface on a side opposite to the tobacco portion; and a plurality of opening portions are formed in the foregoing The end face is exposed to the outside It is placed in the filter portion, and is inclined toward the center axis so as to be farther away from the central axis of the filter as it approaches the end surface.

A filter according to one aspect of the present invention includes a tubular portion that is attached to one end portion of a smoking article, and a filter portion that is disposed inside the tubular portion and opposite to a surface facing the smoking article. The side has an end surface; the plurality of openings are provided in the filter portion so that the end surface is exposed to the outside, and the center axis is further away from the central axis of the filter as the end surface is closer to the end surface tilt.

11‧‧‧ Cigarettes

12‧‧ ‧Tobacco Department

13‧‧‧Filter body

14‧‧‧Winding paper

15‧‧‧ Filter section

16‧‧‧ outer paper

17‧‧‧ Openings

17A‧‧‧Part 1

17B‧‧‧Part 2

17C‧‧‧ bottom

18‧‧‧ Ventilation Department

21‧‧‧Inhalation

22‧‧‧ mouthpiece

22A‧‧‧ end face

31‧‧‧ Core Department

32‧‧‧ sheathing

33‧‧‧Adjacent faces

42‧‧‧Transparent containers

51‧‧‧Smoking apparatus

52‧‧‧ Coverage

61‧‧‧ filter

62‧‧‧ Tube

A‧‧‧ center axis

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

Fig. 2 is a table showing Comparative Examples 1 to 6 and Examples 1 to 24 of the cigarette shown in Fig. 1.

Figure 3 is a perspective view of the cigarette shown in Figure 1.

Fig. 4 is a side view showing the expansion of the periphery of the filter portion of the cigarette shown in Fig. 1.

Fig. 5 is a view showing the diffusion state of the smoke of Comparative Example 1 in the table shown in Fig. 2.

Fig. 6 is a view showing the diffusion state of the smoke of Comparative Example 2 in the table shown in Fig. 2.

Fig. 7 is a graph showing the results of image analysis of the smoke of Comparative Example 2 in the table shown in Fig. 2.

Fig. 8 is a view showing the diffusion state of the smoke of Example 1 in the table shown in Fig. 2.

Fig. 9 is a view showing the diffusion state of the smoke of Example 2 of the table shown in Fig. 2.

Fig. 10 is a graph showing the results of image analysis of the smoke of Example 2 of the table shown in Fig. 2.

Fig. 11 is a view showing the diffusion state of the smoke of Comparative Example 3 in the table shown in Fig. 2.

Fig. 12 is a view showing the diffusion state of the smoke of Comparative Example 4 in the table shown in Fig. 2.

Fig. 13 is a view showing the diffusion state of the smoke of Example 3 of the table shown in Fig. 2.

Fig. 14 is a view showing the diffusion state of the smoke of Example 4 of the table shown in Fig. 2.

Fig. 15 is a graph showing the results of image analysis of the smoke of Example 4 of the table shown in Fig. 2.

Fig. 16 is a view showing the diffusion state of the smoke of Example 5 of the table shown in Fig. 2.

Fig. 17 is a view showing the diffusion state of the smoke of Example 6 in the table shown in Fig. 2.

Fig. 18 is a graph showing the results of image analysis of the smoke of Example 6 of the table shown in Fig. 2.

Fig. 19 is a view showing the diffusion state of the smoke of Example 7 of the table shown in Fig. 2.

Fig. 20 is a graph showing the results of image analysis of the smoke of Example 7 of the table shown in Fig. 2.

Fig. 21 is a view showing the diffusion state of the smoke of Example 8 of the table shown in Fig. 2.

Fig. 22 is a view showing the diffusion state of the smoke of Example 9 of the table shown in Fig. 2.

Fig. 23 is a graph showing the results of image analysis of the smoke of Example 9 of the table shown in Fig. 2.

Fig. 24 is a view showing the diffusion state of the smoke of Example 10 of the table shown in Fig. 2.

Fig. 25 is a view showing the diffusion state of the smoke of Example 11 in the table shown in Fig. 2.

Fig. 26 is a graph showing the results of image analysis of the smoke of Example 11 in the table shown in Fig. 2.

Fig. 27 is a view showing the diffusion state of the smoke of Example 12 of the table shown in Fig. 2.

Fig. 28 is a graph showing the results of image analysis of the smoke of Example 12 of the table shown in Fig. 2.

Fig. 29 is a view showing the diffusion state of the smoke of Example 13 of the table shown in Fig. 2.

Fig. 30 is a graph showing the results of image analysis of the smoke of Example 13 of the table shown in Fig. 2.

Fig. 31 is a view showing the diffusion state of the smoke of Example 14 of the table shown in Fig. 2.

Fig. 32 is a graph showing the results of image analysis of the smoke of Example 14 of the table shown in Fig. 2.

Fig. 33 is a view showing the diffusion state of the smoke of Example 15 of the table shown in Fig. 2.

Figure 34 is a schematic view showing the diffusion state of the smoke of Example 16 of the table shown in Figure 2.

Fig. 35 is a view showing the diffusion state of the smoke of Example 17 of the table shown in Fig. 2.

Fig. 36 is a view showing the diffusion state of the smoke of Comparative Example 4 in the table shown in Fig. 2.

Fig. 37 is a view showing the diffusion state of the smoke of Comparative Example 5 in the table shown in Fig. 2.

Fig. 38 is a view showing the diffusion state of the smoke of Example 18 in the table shown in Fig. 2.

Fig. 39 is a view showing the diffusion state of the smoke of Example 19 of the table shown in Fig. 2.

Fig. 40 is a view showing the diffusion state of the smoke of Example 20 of the table shown in Fig. 2.

Fig. 41 is a view showing the diffusion state of the smoke of Example 21 of the table shown in Fig. 2.

Fig. 42 is a view showing the state of diffusion of the smoke of Example 22 of the table shown in Fig. 2.

Fig. 43 is a view showing the diffusion state of the smoke of Example 23 of the table shown in Fig. 2.

Fig. 44 is a view showing the diffusion state of the smoke of Example 24 of the table shown in Fig. 2.

Fig. 45 is a side elevational view showing a part of the smoking article of an example of the smoking article of the second embodiment.

Fig. 46 is a side elevational view showing a portion of the filter of the embodiment.

(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 to 44. In addition, among smoking articles, cigarettes, cigars, hand-rolled cigarettes, cigarillos, smoking articles that absorb tobacco flavor by heating or heat sources of electronic devices, and tobacco flavors in a non-heated form are included. Smoking apparatus (commodity: ZERO STYLE MINT), etc. The first figure shows that the upper half of the cigarette 11 is cut by a plane passing through the central axis A.

As shown in Fig. 1 and Fig. 3, the cigarette 11 has a tobacco portion 12 which is wrapped around a tobacco yarn (tobacco) by a roll paper to be cylindrical; the cylindrical filter portion 15 contains a filter. The nozzle body 13 and the winding paper 14 surrounding the filter body 13; the tip paper 16 is spanned across the tobacco portion 12 and the filter portion 15; the plurality of opening portions 17 are recessed in The end face 22A of the filter portion 15. The cigarette 11 may have a venting portion 18 (vent hole), and the venting portion 18 is arranged side by side in a strip shape (annular shape) at a substantially intermediate position of the filter portion 15.

The venting portion 18 supplies air from the outside to the filter portion 15, and mainly adjusts the amount of tar by diluting the smoke (mainstream smoke) flowing through the filter portion 15. In the present embodiment, the venting portions 18 (vent holes) are arranged in a strip shape (annular shape) arranged in two rows, for example, at equal intervals. However, the venting portions 18 may be arranged in a strip shape of one row, for example. 2 rows or more. The opening method of the venting portion 18 is not limited, and for example, any one of the following methods: pressing the needle-shaped tooth mold (punch) to press the opening; An electrical method of corona discharge; or a method in which a continuous output beam output from a laser oscillator is distributed into a pulse shape by a rotary chopper and irradiated to open a hole while continuously moving the filter head.

The outer layer paper 16 connects the tobacco portion 12 and the filter portion 15. The outer layer 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 of the one end portion. The vent hole 18 is, for example, a hole that is provided to penetrate the outer layer paper 16 or a hole that penetrates the outer layer paper 16 and the winding paper 14 to the filter portion 15.

Do not ask the material of the outer paper 16. The outer paper 16 generally uses paper made of vegetable fibers, but a chemical fiber sheet or a polymer sheet using a polymer system (polypropylene, polyethylene, nylon, etc.) may be used, or an aluminum foil or the like may be used. Metal foil.

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 of the filter portion. The filter portion can be suitably set to, for example, a diameter of 5 mm to a diameter of 9 mm. In the present embodiment, for example, it is formed into a cylindrical shape having a diameter of 8 mm. The filter portion 15 has a cylindrical core portion 31 located on the center side in the radial direction, a cylindrical sheath portion 32 disposed outside the core portion 31, an abutting surface 33 adjacent to the tobacco portion 12, and abutting The end face 22A on the opposite side of the face. The diameter of the core portion 31 with respect to the diameter of the filter portion 15 is set as in the respective embodiments described later. The venting impedance of the core portion 31 is set to be different from the venting impedance of the sheath portion 32. Specifically, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 is set as in the following embodiments.

The filter body 13 (the core portion 31 and the sheath portion 32) can be formed by various kinds of filler materials. In the present embodiment, the filter body 13 (the core portion 31 and the sheath portion 32) is made of, for example, a filler of cellulose-based semisynthetic fibers such as acetate, but The filler is not limited to this. For the filler, for example, plant fibers such as cotton, hemp, manila hemp, coconut, and rush; animal fibers such as wool and Cashmere wool; cellulose-based regenerated fibers such as hydrazine; acetate, diacetate, and triacetate. Cellulose semi-synthetic fibers such as acid esters; synthetic fibers such as nylon, polyester, acrylate, polyethylene, polypropylene, and polyacetonitrile; paper or a combination thereof.

The filter portion 15 may be formed by adding a granular material other than charcoal, such as a filter for fixing a flavored powder, in addition to a generally known acetate filter or charcoal filter. The filter portion 15 may be formed of a single segment or two or more segments. When more than two segments are used, the segments may be hollow to each other, or a capsule or tobacco wire may be placed in the cavity portion.

Further, the type of plasticizer that can be used for the filter body 13 of the filter portion 15 is not required. For example, triethyl citrate, triethyl citrate, tributyl citrate, dibutyl tartrate, ethylphthalyl ethylglycolate, methyl phthalate a glycol ester, triethylene glycol glycerol, triethyl phosphate, triphenyl phosphate, tripropionin or a combination thereof. Plasticizers may also be used as appropriate.

The combination of the filler used in the core portion 31 and the sheath portion 32 is not particularly limited. Generally, the cellulose acetate is used for the core portion 31 and the sheath portion 32. However, any of the above materials may be used. The core portion 31 and the sheath portion 32 are formed by filling each other. Further, in order to make the venting resistance of the sheath portion 32 higher than the core portion 31, the amount of the plasticizer used in the sheath portion 32 may be increased to be larger than the core portion 31, or the sheath portion may be thermoformed using hot water vapor. 32.

The cigarette 11 may contain, for example, a menthol flavor or the like. Do not ask the method of flavoring, but for example, spray it on the tobacco in the spray process, or The aluminum foil used in the packaging adds flavor and imparts a fragrance to the smoking article. Further, the flavor-affecting rope-like substance may be disposed in the filter portion 15, and the tobacco yarn may be processed into a rope shape or a particulate shape, or the filler of the filter portion 15 may contain a fragrance, or the fragrance may be included. The material of the capsule or the material in which the fragrance is fixed to the powder or the like is disposed in the filter portion 15.

The type and material of the take-up paper 14 used in the filter portion 15 are not required. It can be a ventilated take-up paper or a non-ventilating one for general products. The material of the take-up paper 14 is generally made of vegetable fiber, but a sheet of a chemical fiber (polymer, polypropylene, polyethylene, nylon, etc.) or a polymer sheet may be used, or an aluminum foil may be used. Metal foil like this.

The outer-out filter shown in Fig. 15 of Japanese Patent No. 4262247 can be used for the filter body 13 (core portion and sheath portion). The outer wrapper has a filter material, and the filter material is formed into a cylindrical outer skin layer obtained by thermoforming of the filter material. Therefore, the filter portion 15 (the core portion 31 and the sheath portion 32) of the present embodiment can be produced without using an outer filter.

As shown in FIGS. 3 and 4, the plurality of opening portions are provided such that a portion of the sheath portion 32 in the corresponding end surface 22A is exposed to the outside. The plurality of opening portions 17 are arranged, for example, in a row of rings (or one concentric circle). The plurality of opening portions 17 are configured to be formed into a ring shape of a plurality of rows. For example, a plurality of circular opening portions may be arranged at equal intervals in one row of rings. The number of the opening portions 17 is specifically set as in the respective embodiments described later.

As shown in Fig. 4, the plurality of opening portions 17 are provided obliquely to the central axis A, respectively. More specifically, the plurality of opening portions 17 are inclined toward the central axis A so as to be closer to the central axis A of the filter portion 15 as it approaches the end surface 22A. The plurality of opening portions 17 respectively include: a first portion provided in the sheath portion 32 17A is provided in the second portion 17B of the core portion 31 and the bottom portion 17C.

The plurality of opening portions 17 are formed by, for example, laser processing, and are formed so as to extend from the sheath portion 32 toward the center of the core portion 31 to a predetermined depth. The depth (length) of the opening portion 17 is set in the manner of each of the embodiments described later. The opening portion 17 is provided to form an angle θ with respect to the central axis A of the filter portion 15. The depth (length) of the opening portion 17 and the angle at which the opening portion 17 is provided can be appropriately set, for example, from 1° to 89°, and is provided in detail as described in the following embodiments.

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, for example, a mechanical method of pressing a hole in a needle-shaped tooth mold (a punch) or electricity. The electrical method of halo 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 required. The opening portion 17 may be a circular shape such as a circular shape or an elliptical shape, a triangular shape, a quadrangular shape, a rhombus shape, a parallelogram shape, a trapezoidal shape, a cross shape, a star shape, or the like, or a shape of the combination of the shapes, such as a keyhole. Shapes such as shapes or flags. Further, the shape of the opening portion 17 may be any direction. Alternatively, the angle (direction) of the adjacent opening portions 17 may be changed, and the opening portions 17 having different shapes may be mixed.

Next, an example of the manufacturing procedure of the cigarette 11 of the present embodiment will be described. First, the tobacco portion 12 (tobacco roll) and the filter portion 15 of two lengths are manufactured by a general method. Next, two lengths of the filter portion 15 are inserted between the two tobacco portions 12. Further, the outer paper sheets 16 having two lengths are wrapped together to form a rod shape in which the tobacco portion and the filter portion 15 are coupled to each other. Next, while the connected rod is conveyed at a predetermined speed, a continuous output beam output from a laser oscillator such as a CO ₂ laser is distributed into a pulse shape by a rotary chopper and irradiated in the peripheral direction of the rod. The vent portion 18 (vent hole) is formed on the outer layer paper 16 by the pulsed laser light. Next, the filter portion 15 and the outer layer paper 16 are cut by a cutter at a central position of the filter portion 15 of two lengths to form a cigarette 11. Then, in the continuous conveyance, a laser oscillator having the same configuration as that of the above-described vent portion 18 is used for the end surface 22A of the filter portion 15, and the pulsed laser light is irradiated with a predetermined angle with respect to the central axis A, and A plurality of opening portions 17 are formed to manufacture the cigarette 11.

Further, the manufacturing steps of the cigarette 11 are not limited to the above. Further, after the cigarette 11 is manufactured by a general method, the cigarette 11 is sent to the laser opening machine and the opening portion 17 is perforated at an arbitrary angle.

(Smoke observation and image analysis of smoke)

An example of the cigarette 11 of the smoking article was produced under the conditions of Comparative Examples 1 to 6 and Examples 1 to 24 shown in Fig. 2 . The core portion 31 and the sheath portion 32 are provided in the filter portion 15 as a double coaxial filter, and the core portion 31 and the sheath portion 32 are not provided in the filter portion 15 (the filter is uniformly formed of the same material) The mouth 15 is expressed as cellulose acetate. At the end face of the cigarette 11, the laser beam was irradiated with respect to the central axis A at an angle θ, and an opening portion having a central axis angle of θ was produced (Comparative Examples 3 to 6 and Examples 1 to 24).

The opening 17 is formed using a general laser illuminator (e.g., a CO ₂ laser laser illuminator). The cigarette 11 having a different number of openings, a depth of opening, and an opening angle is produced by changing the number of irradiations of the laser, the laser intensity, the irradiation angle, and the irradiation area. The specifications of the filter portion 15 of the embodiment of the present invention are shown in the table of Fig. 2. Further, the opening portion 17 is provided at a position inside the outer edge of the filter portion 15 by about 1 mm, and is provided so as to open the end surface 22A (except for Comparative Example 4).

The area, depth, and angle of the opening portion 17 provided in the end surface 22A of the filter portion 15 were measured in the following manner. On the side of the area of the opening portion 17, the end surface 22A of the filter portion 15 is enlarged by an optical microscope, and the area of the opening portion 17 is measured using a general area measuring soft body. The opening area is arbitrarily measured for ten opening portions 17, and the product of the arithmetic average and the number of openings is taken as the opening area. The area of each of the opening portions 17 in this embodiment is about 0.2 mm ² .

Regarding the depth and angle of the opening portion 17, for example, the end portion 22A (suction port) of the filter portion 15 is cut into a razor (in the manner of cutting wood), and the filter portion 15 is separated into two, and the optical portion or the magnifying glass is used to enlarge the opening. The hole portion and the depth and angle of the opening portion are measured. The depth and angle of the opening portion 17 are measured by any ten opening portions 17, and the arithmetic average is used as the depth of the opening portion 17 and the angle of the opening portion 17.

The ventilation resistance of the core portion 31 with respect to the sheath portion 32 is expressed by the ratio of the ventilation resistance of the sheath portion 32 and the core portion 31 to the ventilation impedance of the same cross-sectional area. When the ratio of the ventilation resistance of the core portion 31 to the sheath portion 32 is larger than 1, the smoke passing through the filter portion 15 at the time of smoking is more likely to flow in the sheath portion 32 than the core portion 31. On the other hand, when it is less than 1, the smoke passing through the filter portion 15 at the time of smoking is more likely to flow in the core portion 31 than the sheath portion 32.

Next, the diffusion states of the mainstream smoke (air) of Comparative Examples 1 to 6 and Examples 1 to 24 were observed. In this observation, the smoke flowing out of the filter portion 15 is made into a transparent container 42 by acryl, and this is photographed by a digital camera, and an image which is started by smoking at any time is taken. Figures 5, 6, 8, 9, 11, 12, 13, 14, 16, 17, 19, 21, 22, 24, 25, 27, 29, 31, 33 to 44 schematically represent one of the images The position of the smoke is indicated by a broken line. The smoking condition was smoking capacity: 55 ml/2 seconds, and the sample cigarette 11 was smoked when the front end was naturally burned by 20 mm. Figures 7, 10, 15, 18, 20, 23, 26, 28, 30, and 32 show 6th, 9th, 14th, 17th, 19th, 22nd, and 25th. , 27th, 29th, and The image of Fig. 31 is the result of image analysis.

The image analysis method in each embodiment will be described. Image analysis uses general image analysis software. In the image analysis of the present embodiment, image monochrome processing is performed, for example, about 0.6 seconds after the start of smoking, and then the image (control image) in which the smoke does not flow is monochrome processed. Thereafter, the control image is subtracted from the image after the start of smoking, for example, about 0.6 seconds, as a background, and only a monochrome image of, for example, about 0.6 seconds after the start of smoking is taken out. For example, at a position separated from the suction port 22 (end surface) by 10 mm, the degree of whiteness at each position in the vertical direction with respect to the central axis of the filter portion 15 is measured. Here, the whiteness is a value that is quantified from white to black, for example, white is 255, black is 0, and gray is a value obtained by density. Therefore, the value of the smoke is higher, and the smoke is zero.

The horizontal axis is taken at a position perpendicular to the central axis A of the filter portion 15 at a position where the filter portion 15 is separated by, for example, about 10 mm, and the vertical axis is whitened to prepare a graph. Further, the position in the direction perpendicular to the central axis A is normalized by the position of the upper end of the filter portion 15 of the corresponding image being 1 and the position of the lower end of the filter portion 15 being -1. Further, the whiteness is normalized by setting the highest whiteness value of each corresponding image to 1. Further, the above method is an example of an image analysis method, and other image analysis methods may be employed.

(1) Review of the structure of the filter section

First, the mainstream smoke images of the cellulose acetate ester filter portion 15 (Comparative Example 1) and the double coaxial filter filter portion 15 (Comparative Example 2), which are not subjected to the opening portion 17, are respectively displayed. 5 and 6 are. As shown in FIGS. 5 and 6, in Comparative Example 1 and Comparative Example 2, the mainstream smoke was linearly smaller than the diameter of the filter portion 15, and flowed linearly from the end surface toward the central axis A. Mainstream smoke is more than the filter part 15 The diameter of the small diameter flows out along the center of the filter portion 15, and the air is introduced from the outside through the vent portion 18 by diluting the mainstream smoke. No diffusion of mainstream smoke was observed in Comparative Example 2, and it was confirmed by the analysis results of the image of Fig. 7.

On the other hand, Fig. 8 shows an image of the embodiment 1. The cigarette 11 of Example 1 used the filter portion 15 of cellulose acetate. A total of 28 apertures 17 are formed, and the apertures 17 are at an angle of 45° with respect to the central axis A. The opening portion 17 has a depth of 3.2 mm, and the opening portion 17 is exposed to the outside with a portion of the end surface 22A corresponding to the sheath portion 32. As shown in Fig. 8, the mainstream smoke in the first embodiment is diffused in diameter from the filter portion 15. The reason why the degree of diffusion is small is presumed to be that in the first embodiment, there is a flow of air containing smoke near the outer edge of the filter portion 15, and the flow acts on the air flow in the oblique direction through the opening portion 17 (including smoke) Air), pushing the air to the direction of the central axis A and flowing.

Figure 9 shows an image of Example 2. The core portion 31 in Example 2 has a diameter of 4 mm. The ratio of the venting impedance of the core portion 31 to the sheath portion 32 was 0.46. A total of 28 apertures 17 are formed, and the apertures 17 are at an angle of 45° with respect to the central axis A. The depth of the opening portion 17 is 2.5 mm. The opening portion 17 penetrates the sheath portion 32, and the bottom portion 17C of the opening portion 17 is tied to the core portion 31. The opening portion 17 is exposed to the outside with a portion of the end surface 22A corresponding to the sheath portion 32.

As shown in Fig. 9, the cigarette 11 of Example 2 can uniformly diffuse the mainstream smoke at a wider angle than that of the embodiment 1. That is, in the second embodiment, the venting resistance of the sheath portion 32 is higher than that of the core portion 31, and the smoke-containing air flows almost at the core portion 31 having a low ventilating impedance. Therefore there is almost no flow of flue-cured air near the outer edge of the filter. Therefore, the air flow that has flowed out through the opening portion 17 in the oblique direction is not hindered, and the diffusion of smoke or air in the oblique direction with respect to the central axis A is smoothed. In addition, the embodiment 2 The diffusion effect of the cigarette 11 in the oral cavity can also be confirmed by the analysis result of the image shown in Fig. 10.

Furthermore, Fig. 11 shows an image of Comparative Example 3. In Comparative Example 3, a double coaxial filter was used as the filter portion 15, and the diameter of the core portion 31 was 4 mm. The ratio of the venting impedance of the core portion 31 to the sheath portion 32 was 12.8. A total of 28 apertures 17 are formed, and the apertures 17 are at an angle of 45° with respect to the central axis A. The depth of the opening portion 17 is 2.8 mm. The opening portion 17 penetrates the sheath portion 32, and the bottom portion 17C of the opening portion 17 is tied to the core portion 31.

As is apparent from Fig. 11, the sufficient diffusion effect of smoke or air could not be obtained in Comparative Example 3. According to the first embodiment, it is presumed that there is a flow of air containing smoke near the outer edge of the filter portion 15, and the flow hinders the flow of air (including air) flowing out through the opening portion 17 in an oblique direction. . Further, in Comparative Example 3, since the ventilation resistance of the core portion 31 is extremely higher than that of the sheath portion 32, smoke or air flows almost in the sheath portion 32. As a result, the same effect as the smaller cross-sectional area of the filter portion 15 is exerted, and the flow rate of the smoke-containing air flowing through the sheath portion 32 is increased. Therefore, it is presumed that the flow of the smoke-containing air flowing out through the opening portion 17 in the oblique direction is pushed to the direction parallel to the central axis A and flows.

From the review of Examples 1 and 2, the filter portion 15 in which the opening portion 17 is provided may be a filter portion 15 of a cellulose acetate (without the core portion 31 and the sheath portion 32). Further, it is more preferable that the filter portion 15 is constituted by a double coaxial filter, and the ventilation resistance of the sheath portion 32 is higher than the ventilation resistance of the core portion 31 (the ratio of the ventilation impedance of the core portion 31 to the sheath portion 32 is less than 1). ).

(2) Review of the location of the opening

Fig. 12 shows an image of Comparative Example 4. Double in Comparative Example 4 The coaxial filter is used as the filter portion 15, and the diameter of the core portion 31 is 5 mm. The ratio of the ventilation resistance of the core portion 31 to the sheath portion 32 was 0.15. A total of 20 apertures 17 are formed, and the apertures 17 are at an angle of 45° with respect to the central axis A. The depth of the opening portion 17 is 2.0 mm. The opening portion 17 is exposed to the outside by a portion of the end surface 22A corresponding to the core portion 31 (a position of about 1 mm from the outer edge of the core portion 31).

As is apparent from Fig. 12, in the comparative example 4, the mainstream smoke was flowed out approximately linearly along the central axis A, and a sufficient diffusion effect of the smoke-containing air could not be obtained. In the sheath portion 32 where the ventilation resistance is high, the smoke-containing air is difficult to flow, and the smoke-containing air flows almost at the core portion 31. As a result, the same effect as the smaller cross-sectional area of the filter portion 15 is exerted, and the flow velocity of the smoke or the air flowing through the core portion 31 is increased. Therefore, it is presumed that the smoke-containing air flowing through the core portion 31 pushes the smoke-containing air flowing out through the opening portion 17 in the oblique direction and flows in a direction parallel to the central axis A, and the diffusion of the mainstream smoke cannot be obtained. effect.

(3) Review of the depth of the opening (opening depth)

First, the embodiments 3 to 5 in which the opening portion 17 has not reached the core portion 31 are reviewed. Fig. 13 shows an image of Embodiment 3. Fig. 14 shows an image of Example 4. Figure 16 shows an image of Example 5. Fig. 15 shows the results of image analysis of Example 4. The diameter of the core portion 31 in Example 3 was 3.3 mm. The diameter of the core portion 31 in Example 4 was 4.0 mm. The diameter of the core portion 31 in Example 5 was 5.0 mm. In each of Examples 3 to 5, a total of 28 opening portions 17 were formed, and the opening portions 17 were each formed at an angle of 45 with respect to the central axis A. In each of Examples 3 to 5, the opening portion 17 was formed to have a depth (length) of 0.3 mm and did not penetrate the sheath portion 32 and stopped in the middle of the sheath portion 32. The opening portion 17 is exposed to the outside with a portion of the end surface 22A corresponding to the sheath portion 32.

According to Fig. 13, Fig. 14, and Fig. 16, it can be seen that the flow is from the end face 22A. The mainstream smoke does not spread obliquely to the central axis A. Further, according to Fig. 15, the range in which the smoke exists is in the range of +1 to -1, it is understood that the mainstream smoke exists inside the diameter of the filter portion 15.

Next, Examples 6 and 7 in which the partial opening portions reach the core portion 31 are reviewed. Fig. 17 shows an image of Example 6. Fig. 19 shows an image of the embodiment 7. Fig. 18 shows the results of image analysis of Example 6. Fig. 20 shows the results of image analysis of Example 7. The diameter of the core portion 31 in Examples 6 and 7 was 4.0 mm. In each of Examples 6 and 7, a total of 28 opening portions 17 were formed, and the opening portions 17 were each formed at an angle of 45° with respect to the central axis A.

In the sixth embodiment, the opening portions 17 were each formed to have an average depth (length) of 0.8 mm. A plurality of the plurality of opening portions 17 penetrate the sheath portion 32, and the bottom portion 17C of the opening portion 17 reaches the core portion 31. The opening portions 17 in the seventh embodiment were each formed to have an average depth (length) of 1.0 mm. A plurality of the plurality of opening portions 17 penetrate the sheath portion 32, and the bottom portion 17C of the opening portion 17 reaches the core portion 31. Further, in the seventh embodiment, the number of the opening portions 17 penetrating the sheath portion 32 is larger than that of the sixth embodiment. In the sixth and seventh embodiments, the opening portions 17 are exposed to the outside by the portions of the end faces 22A corresponding to the sheath portions 32, respectively.

As shown in Fig. 17, it is understood that in the sixth embodiment, the mainstream smoke flowing out from the end surface 22A is slightly inclined with respect to the central axis. From the results of the image analysis of Fig. 18, in the case of Example 6, a little smoke was present in the range of more than ±1, and the mainstream smoke was slightly enlarged than the diameter of the filter portion 15.

As shown in Fig. 19, in the seventh embodiment, it was confirmed that the smoke spread in the oblique direction with respect to the central axis A as compared with the sixth embodiment. Further, from the results of the image analysis of Fig. 20, it is understood that the cigarette in the cigarette of the seventh embodiment exists in the range of ±2, and the smoke diffuses in the range of about twice the diameter of the filter portion 15.

Next, Examples 8, 9, and 10 in which all of the opening portions 17 reach the core portion 31 are reviewed. Fig. 21 shows an image of Example 8. Fig. 22 shows an image of the embodiment 9. Figure 24 shows an image of Example 10. Fig. 23 shows the results of image analysis of Example 9. The diameter of the core portion 31 in Example 8 was 3.3 mm. The diameter of the core portion 31 in Example 9 was 4.0 mm. The diameter of the core portion 31 in Example 10 was 5.0 mm. In each of Examples 8 to 10, a total of 28 opening portions 17 were formed, and the opening portions 17 were each formed at an angle of 45 with respect to the central axis A. The opening portions 17 in Example 8 were each formed to have an average depth of 2.2 mm. The opening portions 17 in the embodiment 9 were each formed to have an average depth (length) of 1.4 mm. The opening portions 17 in the tenth embodiment were each formed to have an average depth (length) of 0.7 mm.

As shown in Fig. 21, a large amount of smoke in Example 8 was diffused at a wide angle as compared with Examples 6 and 7. As shown in Fig. 22, in the same manner as in the sixth and seventh embodiments, a large amount of smoke was diffused at a wide angle in the same manner. Further, from the results of the image analysis shown in Fig. 23, it was confirmed that the cigarette in the cigarette of Example 9 was present in the range of ±3.5, and the smoke was diffused in the range of about 3.5 times the diameter of the filter portion 15. As shown in Fig. 24, although Example 10 was not as good as Examples 8 and 9, it was confirmed that the smoke spread at a wider angle than that of Example 6.

Further, the depth (length) of the opening portion 17 of the second embodiment is larger than that of the eighth to tenth embodiments. Therefore, the bottom portion 17C of the opening portion 17 reaches the vicinity of the center of the core portion 31. Figure 9 shows an image of Example 2. Fig. 10 shows the results of image analysis of Example 2. According to Fig. 9, in the cigarette of Example 2, it was confirmed that a large amount of smoke was diffused in the oral cavity at a wider angle than the cigarettes 11 of Examples 8 to 10. Further, from the results of the image analysis of Fig. 10, it was confirmed that the cigarette 11 of Example 2 was diffused to about 4 times the diameter of the filter portion 15.

According to the above, when the smoke is diffused in the oblique direction, it is preferable that the plurality of opening portions 17 (bottom portion 17C) of the plurality of opening portions 17 reach the core portion 31. Further, it is preferable that all of the plurality of opening portions 17 reach the core portion 31. Further preferably, the bottom portion 17C of the plurality of opening portions 17 reaches the inside of the core portion 31 (near the center portion). As described above, by appropriately adjusting the diameter of the core portion 31 and the number of the opening portions 17 penetrating the core portion 31, it is possible to appropriately control the smoke flowing straight out along the central axis A and flowing out in the oblique direction. The proportion of smoke.

(4) Review of the angle (opening angle) of the opening portion of the central axis A

Review the impact of the opening angle on mainstream smoke expansion. Fig. 25 shows an image of Example 11. Fig. 26 shows the image analysis result of the eleventh embodiment. In the eleventh embodiment, the number of the opening portions 17 is 28 in total, and the opening portions 17 are at an angle of 10° with respect to the central axis A. The depth of the opening portion 17 is 2.5 mm. The opening portion 17 penetrates the sheath portion 32, and the bottom portion 17C of the opening portion 17 is tied to the core portion 31. The opening portion 17 is exposed to the outside with a portion of the end surface 22A corresponding to the sheath portion 32.

As shown in Figs. 25 and 26, it was confirmed that the smoke flowed out almost in the direction of the central axis A. However, when compared with Comparative Example 2 and the like shown in Fig. 6, it can be seen that the mainstream smoke flows out at a slightly wide angle. Similarly, comparing Fig. 26 of the image analysis result of Example 11 with Fig. 7 of the image analysis result of Comparative Example 2, it can be understood that the smoke of Comparative Example 2 exists in the diameter of the filter portion 15. In the narrower range, in the eleventh embodiment, the flow is slightly the same as the diameter of the filter portion 15.

Figure 27 shows an image of Example 12. Fig. 28 shows the results of image analysis of Example 12. In the tenth embodiment, the number of the opening portions 17 is 28 in total, and the opening portions 17 are at an angle of 20° with respect to the central axis A. The depth of the opening portion 17 is 2.5 mm. The opening portion 17 penetrates the sheath portion 32, and the bottom portion 17C of the opening portion 17 is tied to The core unit 31 is up. The opening portion 17 is exposed to the outside with a portion of the end surface 22A corresponding to the sheath portion 32.

According to Fig. 27, it was confirmed in Example 12 that most of the smoke flowed out in the horizontal direction, and there was smoke flowing out in the oblique direction around the smoke. In addition, it was confirmed that the smoke flowing out in the oblique direction spread earlier than the smoke flowing out in the horizontal direction. According to Fig. 28, it is understood that the smoke flowing out from the end surface 22A exists between the diameter of the filter portion 15 by about 1 to 1.5 times.

Figure 29 shows an image of Example 13. Fig. 30 shows the result of image analysis of Example 13. In the thirteenth embodiment, the number of the opening portions 17 was 28 in total, and the opening portions 17 were at an angle of 30° with respect to the central axis A. The depth of the opening portion 17 is 2.5 mm. The opening portion 17 penetrates the sheath portion 32, and the bottom portion 17C of the opening portion 17 is tied to the core portion 31. The opening portion 17 is exposed to the outside with a portion of the end surface 22A corresponding to the sheath portion 32.

According to the twenty-ninth aspect, in the thirteenth embodiment, it was confirmed that the smoke flowing out in the horizontal direction was smaller than that of the examples 11 and 12, and the amount of smoke flowing out in the oblique direction was increased. In the same manner as in the twelfth embodiment, it was confirmed that the smoke flowing out in the oblique direction spread earlier than the smoke flowing out in the direction of the central axis A. According to Fig. 30, it can be confirmed that the smoke flowing out from the end surface 22A exists between the diameter of the filter portion 15 by about 1.5 times to 2 times.

Figure 9 shows an image of Example 2. Fig. 10 shows the results of image analysis of Example 2. In the second embodiment, the opening portions 17 have an angle of 45 with respect to the central axis A. According to Fig. 9, it was confirmed that the cigarette 11 of the second embodiment had almost no smoke flowing out in the horizontal direction, and a large amount of smoke flowed out at a wide angle in the oblique direction. Further, in the same manner as in the examples 12 and 13, it was confirmed that the smoke flowing out in the oblique direction spread earlier than the smoke flowing out in the horizontal direction. From Fig. 10, the smoke spreads to about 4 times the diameter of the filter portion 15, and in the direction crossing the central axis A, the value of the whiteness is at each position. A slightly similar value is obtained, thereby confirming that the slightly uniformized smoke spreads in a wider angle.

Figure 31 shows an image of Example 14. Fig. 32 shows the results of image analysis of Example 14. In the fourteenth embodiment, the opening portions 17 have an angle of 60° with respect to the central axis A. The depth of the opening portion 17 is 2.5 mm. The opening portion 17 penetrates the sheath portion 32, and the bottom portion 17C of the opening portion 17 is tied to the core portion 31. The opening portion 17 is exposed to the outside with a portion of the end surface 22A corresponding to the sheath portion 32.

According to Fig. 31, in addition to the smoke flowing out in the direction of the central axis A, the smoke flowing out at a wide angle in the oblique direction was confirmed at the same time. Since the angle of the opening portion 17 is 60°, the second portion 17B (or the bottom portion 17C) of the opening portion 17 of the embodiment 14 is the second portion of the opening portion 17 of the second embodiment (opening angle 45°). 17B (or bottom 17C) is closer to end face 22A. Therefore, in the fourteenth embodiment, since the ventilation resistance between the second portion to the end surface 22A of the opening portion 17 is lowered, the smoke easily flows out in the direction of the central axis A as compared with the second embodiment in which the distance is long. Therefore, when the opening angle is set to 60° in the embodiment 14, the smoke in the direction along the central axis A flows out almost simultaneously with the tobacco system in the oblique direction. According to Fig. 32, the smoke is present in about four times the diameter of the filter portion 15, but it is confirmed that a large amount of smoke exists in the range of the diameter of the filter portion 15 (the range of -1 or more and +1 or less).

From the above, it is preferable that the opening portion 17 is provided at an angle of 20° or more and 60° or less with respect to the central axis A, and the diffusion angle of the smoke is a wide angle. More preferably, the opening portion 17 is provided at an angle of 30° or more and 60° or less with respect to the central axis A, and the diffusion angle of the smoke is a wider angle.

(Review of the number of openings)

Next, the influence of the number of the opening portions 17 on the state of the mainstream smoke flowing out in the oblique direction, especially the amount of mainstream smoke, is examined.

Figure 33 shows an image of Example 15. Figure 34 shows an image of Example 16. Figure 9 shows an image of Example 2. Figure 35 shows an image of Example 17. In the fifteenth embodiment, ten opening portions 17 are provided, and in the sixteenth embodiment, twenty opening portions 17 are provided. Further, in the second embodiment, 28 opening portions 17 are provided, and in the embodiment 17, 42 opening portions 17 are provided. The opening portions 17 are each at an angle of 45 to the central axis.

As shown in Fig. 33, in addition to the smoke flowing out in the direction of the central axis A, the smoke flowing out in the oblique direction was confirmed in the fifteenth embodiment. In the fifteenth embodiment, since the number of the opening portions 17 is small, the amount of smoke flowing out in the oblique direction is small, and the thin strip of smoke flows out in the oblique direction.

As shown in Fig. 34, in addition to the smoke flowing out in the direction of the central axis A, the smoke flowing out in the oblique direction was confirmed in the sixteenth embodiment. As compared with Example 15, it was confirmed that the amount of smoke flowing out in the oblique direction in Example 16 was increased.

As shown in Fig. 2, in the second embodiment, it was confirmed that a large amount of smoke flows out obliquely. Further, smoke flowing out in the direction of the central axis A was hardly confirmed.

As shown in Fig. 35, in Example 17, it was confirmed that more smoke flows out obliquely. Further, it was confirmed that the flue gas flowing out in the oblique direction was not the filament-like smoke as seen in Example 15, but was in the form of a thick strip.

From the above review, it was confirmed that by changing the number of the opening portions 17, the amount of smoke flowing out in the oblique direction can be adjusted without changing the outflow angle.

(6) Review of the ventilation resistance ratio between the sheath and the core

The effect of the venting impedance ratio of the sheath portion 32 and the core portion 31 on the expansion of the mainstream smoke was examined. First, a comparative example in which the core part 31 is hollow is reviewed. Fig. 36 shows an image of Comparative Example 4. Fig. 37 shows an image of Comparative Example 5.

In Comparative Example 4, a cavity having a diameter of 2 mm was provided in the entire width of the central axis A of the filter portion 15 at a position corresponding to the core portion 31. In Comparative Example 5, a cavity having a diameter of 4 mm was provided in the entire width of the central axis A of the filter portion 15 at a position corresponding to the core portion 31. Therefore, the venting impedance of the cavity portion is zero.

As shown in Figs. 36 and 37, the mainstream smoke passes through the hollow portion in the filter portion 15 without depending on the size of the core diameter. Therefore, even if the inclined opening portion 17 is provided in the end surface 22A, a part of the mainstream smoke does not pass through the opening portion 17. Therefore, in Comparative Examples 4 and 5, the flow of the mainstream smoke was straight, and the diffusion effect in the oblique direction could not be obtained.

Next, the ventilating impedance ratio of the core portion 31 to the sheath portion 32 was examined and compared with Examples 18 to 21 and Example 2. The cigarettes 11 of Examples 18 to 21 and Example 2 each formed the core portion 31 to have a diameter of 4 mm. In Example 18, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 was 0.05. In the nineteenth embodiment, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 was 0.09. In Example 20, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 was 0.15. In the second embodiment, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 was 0.46. In Example 21, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 was 6.07.

Figure 38 shows an image of Example 18. In the first embodiment, the mainstream smoke passes through the core portion 31 without passing through the opening portion 17, and thus flows straight along the central axis A.

Fig. 39 shows an image of Example 19. In the ninth embodiment, it was confirmed that the smoke flowing out from the core portion 31 in the direction of the central axis A occupied most of the smoke, and the smoke diffused slightly in the oblique direction with respect to the central axis A.

Fig. 40 shows an image of Example 20. In addition to the example 20 In addition to the smoke that flows out of the core portion 31 linearly in the central axis A direction, there is also smoke that is diffused in the oblique direction with respect to the central axis A.

Figure 9 shows an image of Example 2. In Example 2, almost no smoke flowing straight out was observed, and almost all of the smoke flowed obliquely with respect to the central axis A.

Fig. 41 shows an image of Example 21. In the embodiment 21, the smoke diffused in the oblique direction with respect to the central axis A was confirmed, but the diffusion angle of the smoke was small. In this case, it is presumed that there is a large amount of smoke flow in the sheath portion 32 having a low ventilation resistance, but the flow of the sheath portion 32 acts on the flow which is to be diffused in the oblique direction through the opening portion 17, so that it is diffused to The oblique direction of the smoke is pushed toward the central axis A direction. Therefore, it can be presumed that a sufficient smoke diffusion effect cannot be obtained.

As described above, when the diameter of the core portion 31 is 4 mm, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 is 0.09 or more, and the smoke diffuses, thereby starting in a linear direction at 0.46. There is very little smoke, and the spread of smoke will become larger. Furthermore, if the ratio of the ventilation resistance is 6.07, the diffusion of smoke is suppressed.

Further, the cigarettes 11 of Examples 22 to 24 having a diameter of 2 mm of the core portion 31 were examined. In Example 22, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 was 0.02. In Example 23, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 was 0.05. In the twenty-fourth embodiment, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 was 0.15.

Figure 42 shows an image of Example 22. In the twenty-second embodiment, it is confirmed that the first smoke flows straight out from the core portion 31 in the direction of the central axis A, and then a small amount of smoke flows out from the opening portion 17 in the oblique direction.

Figure 43 shows an image of Example 23. In Example 23, along The flow of the central axis A flowing out linearly is suppressed, and instead, the smoke flowing out obliquely with respect to the central axis A increases.

Figure 44 shows an image of Example 24. In Example 24, the flow straight out in the direction of the central axis A was hardly observed, and it was confirmed that the central axis was expanded at a wide angle in the oblique direction.

According to the above, it is understood that the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 is small even when the diameter of the core portion 31 is 2 mm, compared with the case where the diameter of the core portion 31 is 4 mm. It spreads obliquely with respect to the central axis A. That is, the ratio of the ventilating impedance of the core portion 31 to the venting impedance of the sheath portion 32 is 0.02 or more, and the mainstream smoke is diffused in the oblique direction, so that the initial direction is 0.05 or more and the direction is oblique with respect to the central axis A. A sufficient amount of smoke diffuses, and if it is 0.15 or more, the smoke flowing out toward the central axis A becomes extremely small, and the smoke can be uniformly diffused at a wide angle.

According to the first embodiment and the first to fourth embodiments, the smoking article (cigarette 11) has a tobacco portion 12; the filter portion 15 is provided adjacent to the tobacco portion 12, and has an end surface 22A on the opposite side of the tobacco portion 12; The plurality of opening portions 17 are provided in the filter portion 15 so that the end surface 22A is exposed to the outside, and are inclined toward the center axis so as to be closer to the central axis A of the filter as it approaches the end surface 22A.

It is generally known that the organ that senses the taste in the oral cavity is mainly the tongue, the organ that feels the sense of the body is the whole body of the mouth, and the organ that feels the fragrance is distributed in the nasal cavity. Thus, the smoke or steam is efficiently contacted with the receiving organs, thereby allowing the smoker to taste a better taste and aroma. It is also known that by changing the flow of mainstream smoke, it has an effective effect on the taste absorption.

According to the above configuration, not only the direction along the central axis A, but also the mainstream The smoke can also diffuse in an oblique direction with respect to the central axis A. Thereby, the air containing the smoke can be uniformly diffused in the oral cavity, and it can be made into an excellent taste. In addition, it can be continuously manufactured by using a general tobacco wrapping machine, and it is possible to realize smoking articles which are advantageous for the industry.

The filter portion 15 has a core portion 31 on the center side, and a sheath portion 32 located outside the core portion 31 and having a ventilation resistance greater than that of the core portion 31. According to this configuration, the smoke-containing air is more likely to flow on the side of the core portion 31, and conversely, the flow rate of the smoke-containing air on the side of the sheath portion 32 can be made small. Thereby, the flow of the air flowing through the sheath portion 32 can be prevented from flowing toward the central axis A by the air flowing through the opening portion 17 and obliquely with respect to the central axis A. Thereby, the diffusion effect of the smoke can be obtained more surely.

The plurality of opening portions 17 respectively have a bottom portion 17C reaching the core portion 31, and a portion of the end surface 22A corresponding to the sheath portion 32 is exposed to the outside. According to this configuration, the opening portion 17 can take air in the core portion 31 having a large flow rate of the smoke-containing air, and the flow rate of the air passing through the opening portion 17 can be increased to increase the amount of diffusion of the smoke. Further, since the opening portion 17 is exposed to the outside at a position corresponding to the sheath portion 32 having a large ventilating impedance, the air flow passing through the sheath portion 32 in the vicinity of the end surface 22A through the air flow in the oblique direction of the opening portion 17 can be prevented. Push to the center axis A direction and flow. Thereby, the diffusion effect of the desired smoke can be exerted in the oral cavity.

The angle formed by the opening portion 17 and the central axis 17 is 30° or more and 60° or less. This configuration prevents the smoke from being sufficiently obtained when, for example, the angle between the opening portion 17 and the central axis A is about 20°. The state of proliferation of wide angles. Further, when the angle between the opening portion 17 and the central axis A is greater than 60°, the bottom portion 17C of the opening portion 17 and the end surface 22A become too close to each other between the bottom portion 17C and the end surface 22A of the opening portion 17. The ventilation impedance becomes too low. Thereby preventing smoke along the central axis A The flow becomes too easy, and the flow rate of the air that flows out through the opening portion 17 in the oblique direction with respect to the central axis A can be increased. Thereby, the smoke can be uniformly diffused at a wide angle in the oral cavity.

The ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 is 0.02 or more and 0.46 or less. With this configuration, the smoke-containing air can be actively flown in the core portion 31, and the flow rate of the air passing through the sheath portion 32 can be made small. Thereby, the flow rate of the air taken in the core portion 31 and passing through the opening portion 17 is increased, and the amount of diffusion of the smoke is increased. Further, it is possible to prevent the air flow passing through the inclined portion 17 from being pushed by the air flow passing through the sheath portion 32 to flow in the direction along the central axis. Thereby, the diffusion effect of the desired smoke can be obtained, and the fragrance can be improved.

The diameter of the core portion 31 is 25% or more and 50% or less of the diameter of the filter portion 15. In the smoking article of the present embodiment, the ventilation resistance of the core portion 31 is small with respect to the ventilation resistance of the sheath portion 32. Therefore, the smoke-containing air mainly flows in the core portion 31. According to the above configuration, the diameter of the core portion 31 can be made half or less with respect to the diameter of the filter portion 15. Therefore, the same effect as that of the cross-sectional area of the filter portion 15 can be exerted, and the flow velocity of the air flowing through the core portion 31 can be increased. Thereby, the flow rate of the air which is taken in the core portion 31 and passed through the inside of the opening portion 17, and then flows out obliquely with respect to the central axis increases. Thereby, a sufficient diffusion effect of the smoke can be obtained in the oral cavity.

(Second embodiment of smoking articles)

Next, a second embodiment of a smoking article will be described with reference to Fig. 45. The smoking article according to the second embodiment is applied to a smoking device that sucks tobacco flavor by a non-heating type. Here, the differences from the first embodiment will be mainly described, and the description of the portions common to the first embodiment will be omitted. It is shown in Fig. 45 that the upper half of the smoking article will be cut to be cut through the plane of the central axis A.

As shown in Fig. 45, the smoking device 51 has a tobacco portion 12 made of tobacco (tobacco); a first filter portion 15A and a second filter portion 15B adjacent to the cylindrical portion of the tobacco portion 12; The cylindrical portion of the first filter portion 15A and the second filter portion 15B is a resin-made 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.

The first filter portion 15 can be suitably set, for example, from 5 mm in diameter to 9 mm in diameter, and in the present embodiment, for example, a cylindrical shape having a diameter of 8 mm. The first filter portion 15 has a cylindrical core portion 31 located on the center side in the radial direction, a cylindrical sheath portion 32 disposed on the outer side of the core portion 31, an abutting surface 33 adjacent to the tobacco portion, and abutting The end face 22A on the opposite side of the face. The diameter of the core portion 31 is set with respect to the diameter of the filter portion 15 in the manner of each of the embodiments described later. The venting impedance of the core portion 31 is set to be different from the venting impedance of the sheath portion 32. Specifically, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 is set as in the respective embodiments of the first embodiment.

The plurality of opening portions 17 are provided such that portions of the end faces 22A corresponding to the sheath portions 32 are exposed to the outside, and are, for example, arranged in a ring shape (or radial shape). The plurality of opening portions 17 may be configured to be in a ring shape of a plurality of rows. In the ring of one row, for example, a plurality of circular opening portions 17 are arranged at equal intervals, for example. Specifically, the number of the opening portions 17 can be set as in the respective embodiments of the first embodiment.

Each of the plurality of opening portions 17 includes a first portion 17A provided in the sheath portion 32, a second portion 17B provided in the core portion 31, and a bottom portion 17C. The depth (length) of the opening portion 17 is set as in the respective embodiments of the first embodiment. The opening portion 17 is provided to form an angle θ with the central axis A of the first filter portion 15. The depth (length) of the opening portion 17 and the set angle of the opening portion 17 can be, for example, The setting is suitably set to be 1° or more and 89° or less, and can be set in detail as in the respective embodiments of the first embodiment.

As shown in Fig. 45, the basic structure of the smoking article 51 of the second embodiment is the same as that of the cigarette 11 of the first embodiment shown in Fig. 1. Therefore, the smoking apparatus 51 according to the second embodiment can be obtained by observing smoke and image analysis under the same conditions as those of Comparative Examples 1 to 6 and Examples 1 to 24 of the first embodiment. The same results as in the first embodiment.

According to this embodiment, in the same manner as in the first embodiment and the first to the second embodiments, the effect of diffusing the tobacco in the oral cavity (the air containing the tobacco flavor from the filter portion 15) at a wide angle and uniformly can be expected. It can also enhance the absorption of fragrance.

(The implementation of the filter)

An embodiment of a filter installed in a smoking article and used will be described with reference to Fig. 46. Although the filter is different from the smoking article itself, the structure of the applicable opening portion is the same as that of the above-described smoking article. Therefore, the difference from the structure of the smoking article of the first embodiment will be mainly described, and the description of the portion common to the first embodiment will be omitted. Figure 46 shows the upper half of the filter cut through the plane of the central axis A.

The filter 61 is configured to be detachable with respect to a smoking article such as the above-described general cigarette 11 (a cigarette in which the opening portion is not provided). The filter 61 has a tubular portion 62 which is made of resin which is attached to one end portion of the smoking article (cigarette 11), and a filter portion 15 which has a suction port 22 and is provided in a cylindrical shape inside the cylindrical portion; The opening portion 17 is provided beside the suction port portion 22 and is provided in the tubular portion 62.

The filter portion 15 can be appropriately set, for example, from 5 mm in diameter to 9 mm in diameter, and in the present embodiment, for example, a cylindrical shape having a diameter of 8 mm. Filter part 15 There are a cylindrical core portion 31 located on the center side in the radial direction, a cylindrical sheath portion 32 disposed outside the core portion 31, an abutting surface 33 adjacent to the tobacco portion 12, and an opposite side to the abutting surface 33. End face 22A. The diameter of the core portion 31 with respect to the diameter of the filter portion 15 is set as in the respective embodiments of the first embodiment. The ventilation resistance of the core portion 31 is set to be different from the ventilation resistance of the sheath portion 32. Specifically, the ratio of the ventilation resistance of the core portion 31 to the ventilation resistance of the sheath portion 32 is set as in the respective embodiments of the first embodiment.

The plurality of opening portions 17 are provided such that portions of the end faces 22A corresponding to the sheath portions 32 are exposed to the outside, for example, one row of rings (or radial). The plurality of opening portions 17 may be configured to be in a ring shape of a plurality of rows. In the first row of rings, for example, the circular opening portions 17 are arranged at a plurality of intervals, for example. The number of the opening portions 17 is specifically set as in the respective embodiments of the first embodiment.

Each of the plurality of opening portions 17 includes a first portion 17A provided in the sheath portion 32, a second portion 17B provided in the core portion 31, and a bottom portion 17C. The depth (length) of the opening portion 17 is set as in the respective embodiments of the first embodiment. The opening portion 17 is set such that the angle between the central axis A of the filter portion 15 becomes θ. The depth (length) of the opening portion 17 and the installation angle of the opening portion 17 can be appropriately set, for example, from 1° to 89°, and are set in detail in the respective embodiments of the first embodiment.

As shown in Fig. 46, the basic structure of the filter 61 of the present embodiment is the structure around the filter of the cigarette 11 of the first embodiment shown in Fig. 1 (including the filter portion 15, the outer layer 16 and the like). The structure is the same. Therefore, in the same manner as the filter 61 of the present embodiment, when the smoke and the image analysis are performed in the same manner as the first to sixth embodiments of the first embodiment and the first to sixth embodiments, the first and the first analysis can be performed. Implementation The same result as the form. In addition, in the observation, analysis, and evaluation, the general cigarette 11 is attached to the filter 61. The smoking conditions are the same as in the first embodiment.

In other words, according to the present invention, as in the first embodiment and the first to fourth embodiments, the diffusion effect of the tobacco-containing air released from the smoke or the filter portion in the mouth can be expected, and the fragrance can be improved. .

In addition, the smoking articles (cigarettes 11, smoking articles) and the filter 61 are not limited to the above-described embodiments and the respective embodiments, and constituent elements may be changed and embodied in the implementation stage without departing from the scope of the invention. For example, several constituent elements of the full configuration elements shown in the embodiments and the embodiments may be deleted, or different embodiments and constituent elements of the respective embodiments may be combined as appropriate.

11‧‧‧ Cigarettes

12‧‧ ‧Tobacco Department

13‧‧‧Filter body

14‧‧‧Winding paper

15‧‧‧ Filter section

16‧‧‧ outer paper

17‧‧‧ Openings

18‧‧‧ Ventilation Department

21‧‧‧Inhalation

22‧‧‧ mouthpiece

22A‧‧‧ end face

31‧‧‧ Core Department

32‧‧‧ sheathing

33‧‧‧Adjacent faces

A‧‧‧ center axis

Claims (7)

A smoking article comprising: a tobacco portion; a filter portion disposed adjacent to the tobacco portion, and having an end surface on a side opposite to the tobacco portion; and a plurality of opening portions exposed to the outside at the end surface The method is provided in the filter portion, and is inclined with respect to the central axis so as to be away from the central axis of the filter portion as it approaches the end surface. The smoking article of claim 1, wherein the filter portion has: a core portion on a center side; and a sheath portion located on an outer side of the core portion and having a larger portion than the core portion Ventilation impedance. The smoking article according to claim 2, wherein the plurality of openings have a bottom portion to the core portion, and a portion of the end surface corresponding to the sheath portion is exposed to the outside. The smoking article according to claim 3, wherein the opening portion has an angle of 30° or more and 60° or less with respect to the central axis. The smoking article according to claim 4, wherein a ratio of the ventilation resistance of the core portion to the ventilation resistance of the sheath portion is 0.02 or more and 0.46 or less. The smoking article according to claim 5, wherein the diameter of the core portion is 25% or more and 50% or less of the diameter of the filter portion. A filter having: The tubular portion is installed at one end of the smoking article; the filter portion is installed inside the tubular portion, and has an end surface on the opposite side of the surface facing the smoking article; and a plurality of opening portions The filter is provided on the filter portion so as to be exposed to the outside, and is inclined with respect to the central axis so as to be away from the central axis of the filter portion as it approaches the end surface.