TWI727128B - Smoking article and filter for smoking article - Google Patents

Abstract

A filter for smoking article according to the present invention has a powder inclusion product obtained by making a raw material powder containing at least one of a taste component and a fragrance component become one piece, which will become powder upon application of an external force, a cavity in which the powder inclusion product is disposed, and a rectification member continuously provided at the upstream side of the cavity and rectifying the mainstream smoke flowing from the upstream side and guiding it to the cavity.

Description

Smoking articles and filters for smoking articles

The invention relates to a smoking article and a filter for the smoking article.

There is known a cigarette that can enjoy the taste, aroma, or both by inhaling the powder in the filter. For example, Patent Document 1 discloses a smoking article including: a powder content, which is formed by forming a piece of raw material powder containing at least any one of a flavoring component and a flavoring component, which is formed by applying an external force Powder; a cavity, which is equipped with the powder content; and a filter, which includes a flow path that allows the cavity to communicate with the mouth end for the powder to pass through.

[Prior Technical Literature] [Patent Literature]

Patent Document 1: International Publication No. 2016/181843

In the filter described in Patent Document 1, through the powder The inner diameter of the flow path is formed to be smaller than the outer diameter of a piece of powder content, which can prevent the powder from falling off soot that is scattered at an unexpected time during manufacturing or transportation. However, in the conventional technology, there is still room for improvement regarding the delivery efficiency of the powder-containing powder in the cavity.

In view of the above-mentioned problems, the subject of the present invention is to provide a filter for smoking articles that can absorb a powder containing at least any one of a flavoring component and a flavor component, and can improve the smoking time compared to the past. The technology of powder transportation efficiency.

In order to solve the above-mentioned problems, the present invention connects a rectifying member on the upstream side of the cavity where the powder content is arranged, whereby the rectifying member rectifies the mainstream smoke flowing from the upstream side and introduces it into the cavity.

In more detail, the smoking article of the present invention includes: a tobacco rod containing shredded tobacco; and a filter connected to the end of the tobacco rod via an outer layer of paper (tipping paper, also known as filter paper, tipping paper); The mouth has: a powder content, which is formed by forming a piece of raw material powder containing at least any one of a flavoring component and a flavor component, and the powder is formed by applying an external force; a cavity is provided with the aforementioned powder content And a rectifying member, which is connected to the upstream side of the cavity, and rectifies the mainstream smoke flowing from the upstream side and guides it to the cavity.

Examples of smoking articles include cigarettes, cigars, cigarillos, smoking utensils that use electronic components to heat or carbon heat sources to taste the aroma or aroma of tobacco, or both, and non-heated smoking devices. smoke A smoking device for the aroma or scent of grass, or both.

In addition, in the smoking article of the present invention, the aforementioned rectifying member may have: a low ventilation resistance portion arranged in a part of the cross section from the front end surface to the rear end surface, and the ventilation resistance is relatively low; and the arrangement from the front end surface to the rear end surface In the other part of the cross section, a high ventilation resistance part with a higher ventilation resistance than the aforementioned low ventilation resistance part; and the mainstream smoke flowing from the upstream side through the aforementioned low ventilation resistance part is guided to the aforementioned cavity.

In addition, in the smoking article of the present invention, the rectifying member may have: a hollow path penetrating the rectifying member in the axial direction; and a ventilation restricting portion formed in an area other than the hollow path and restricting the flow of mainstream smoke, the hollow path It corresponds to the aforementioned low ventilation resistance portion, and the aforementioned ventilation restriction portion corresponds to the aforementioned high ventilation resistance portion.

In addition, in the smoking article of the present invention, the rectifying member may be formed of a rod-shaped filter material, and the density of the filter material of the low ventilation resistance portion is lower than that of the high ventilation resistance portion.

In addition, the smoking article of the present invention may be further provided with a mouthpiece filter portion which is connected to the downstream side of the cavity and communicates the cavity with the mouthpiece end and is used to remove the powder from the cavity The powder supply path supplied to the aforementioned suction port end is formed along the axial direction.

In addition, in the smoking article of the present invention, the powder supply path may have a cross section capable of suppressing entry of the powder-containing material in a lump.

In addition, in the smoking article of the present invention, the low ventilation resistance portion (for example, a hollow path) in the rectifying member and the mouth filter portion The powder supply path in can also be arranged at a corresponding position in the cross section of the filter.

In addition, in the smoking article of the present invention, the low ventilation resistance portion (e.g., hollow path) in the rectifying member and the powder supply path in the mouthpiece filter portion may be arranged in a cross section of the filter. Corresponding location.

In addition, in the smoking article of the present invention, the low ventilation resistance portion (for example, a hollow path) may be arranged in an area on the peripheral side of the cross section of the rectifying member.

In addition, in the smoking article of the present invention, a plurality of the low ventilation resistance portions (for example, hollow paths) may be arranged in the region on the peripheral side of the rectifying member.

In addition, in the smoking article of the present invention, a plurality of the low ventilation resistance portions (for example, hollow paths) may be arranged at regular intervals along the circumferential direction of the region on the peripheral side in the rectifying member.

In addition, in the smoking article of the present invention, the low ventilation resistance portion (for example, the hollow path) may be arranged in the central area of the cross section of the rectifying member.

Here, the present invention may also be specified as a filter for the above-mentioned smoking article. Specifically, the filter for smoking articles of the present invention is provided with a powder content, which is formed by forming a piece of raw material powder containing at least any one of a flavoring component and a flavor component, which is formed by applying an external force Powder; The cavity is equipped with the aforementioned powder content; and the rectifying member is connected to the upstream side of the aforementioned cavity, and for the mainstream smoke flowing from the upstream side After rectification, it is guided to the aforementioned cavity.

In addition, the means for solving the problems of the present invention can be combined and adopted as much as possible.

According to the present invention, it relates to a filter for smoking articles that can inhale powder containing at least any one of a flavoring component and a flavor component, and can improve the delivery efficiency of the powder when inhaled compared to the prior art.

1: cigarette

2: Cigarette

3: Outer paper

4: filter

21: Tobacco

22: roll paper

31: Vent

40: Rectifying member

41: Upstream filter

42: suction filter part

43: Cavity

44: Powder content

45: Cigarette paper

400: hollow road

401: Ventilation Restriction Department

421: Powder Supply Path

4210: Central connection

4211: Hole

4211a: Peripheral side area

4211b: Central area

CL: central axis

Fig. 1 is a diagram showing a perspective view of the appearance of the cigarette of the first embodiment.

Fig. 2 is a diagram showing a longitudinal cross-sectional view of the main part of the cigarette of the first embodiment.

Fig. 3 is a diagram showing a cross section of the suction port filter of the first embodiment.

Fig. 4 is a diagram showing a cross section of the rectifying member of the first embodiment.

Fig. 5 is a diagram showing a state in which the powder content in the filter of the first embodiment is crushed to form a powder form.

Fig. 6 is a graph showing a list of the rate of change in the powder conveyance amount relative to the control cigarette in each example.

Fig. 7A is a schematic diagram of a cross section of the rectifying member of each embodiment.

Fig. 7B is a schematic diagram of a cross-section of the rectifying member of each embodiment.

Fig. 8 is a schematic diagram of a smoking device used for measuring the powder delivery amount in the embodiment.

Fig. 9A is a longitudinal sectional view of a cigarette filter of Modification 1.

Fig. 9B is a cross-sectional view of the rectifying member of the filter of Modification 1.

FIG. 9C is a cross-sectional view of the mouthpiece filter portion of the filter of Modification 1. FIG.

Fig. 10A is a longitudinal sectional view of a cigarette filter of Modification Example 2.

Fig. 10B is a cross-sectional view of the rectifying member of the filter of Modification 2.

Fig. 10C is a cross-sectional view of the mouthpiece filter portion of the filter of Modification 2.

Fig. 11A is a longitudinal sectional view of a cigarette filter of Modification 3.

Fig. 11B is a cross-sectional view of the rectifying member of the filter of Modification 3.

FIG. 11C is a cross-sectional view of the mouthpiece filter portion of the filter of Modification 3. FIG.

Fig. 12A is a longitudinal sectional view of a cigarette filter of Modification 4.

Fig. 12B is a cross-sectional view of the rectifying member of the filter of Modification 4.

Fig. 12C is a cross-sectional view of the mouthpiece filter portion of the filter of Modification 4.

Hereinafter, the embodiment of the cigarette with filter, which is an example of the smoking article of the present invention, will be described in detail with reference to the drawings. The dimensions, materials, shapes, relative positions, etc. of the constituent elements described in the present embodiment will not limit the technical scope of the invention to only the aforementioned elements unless there are specific descriptions.

<Embodiment 1>

Fig. 1 is a perspective view of the appearance of the cigarette 1 of the first embodiment. Fig. 2 is a longitudinal sectional view of the main part of the cigarette 1 of the first embodiment. The cigarette 1 is a cigarette with a filter provided with a cigarette rod 2 and a filter 4 connected to one end of the cigarette rod 2 via an outer layer paper 3.

Tobacco rod 2 is formed by rolling up shredded tobacco 21 with paper 22 Those who are cylindrical (rod-shaped). The filter 4 is a member used to filter the smoke components contained in the mainstream smoke when the mainstream smoke generated during the smoking of the cigarette 1 passes, and is shaped into a cylindrical shape with substantially the same diameter as the tobacco rod 2.

The filter 4 is rolled up by the cigarette paper 45 and the outer layer paper 3 and is connected to the rear end side of the cigarette rod 2 via the outer layer paper 3. The outer paper 3 is formed by rolling the end of the cigarette rod 2 and the filter 4 into one body to connect (connect) these members. Hereinafter, the end connected to the filter 4 in the longitudinal direction (axial direction) of the cigarette rod 2 is referred to as the "rear end", and the end on the opposite side is referred to as the "front end" (tip). In the longitudinal direction (axial direction) of the filter 4, the end connected to the cigarette rod 2 is referred to as the "front end", and the end opposite to the end is referred to as the "inhalation end". The cross section along the longitudinal direction (axial direction) of the cigarette 1 (stem 2, filter 4) is defined as the "longitudinal cross section", and the cross section in the direction orthogonal to the longitudinal cross section is defined as the "transverse cross section". In addition, "upstream" and "downstream" mean the relative positional relationship based on the flow direction of mainstream smoke. In addition, the symbol CL shown in FIG. 2 represents the central axis of the cigarette 1 (the tobacco rod 2, the filter 4).

The filter 4 includes: an upstream filter portion 41 connected to the rear end of the cigarette rod 2, a suction mouth filter portion 42 located at the end of the mouthpiece; a rectifying member 40 formed between the upstream filter portion 41 and the mouthpiece filter portion 42 and Hollow cavity 43; and powder-containing material 44 accommodated in cavity 43 and the like. The filter 4 is provided with an upstream filter portion 41, a rectifying member 40, a cavity 43, and a suction filter portion 42 in this order from the front end side. The powder-containing material 44 is formed by forming a raw material powder containing at least any one of a taste component and a flavor component into one piece, and is crushed by a smoker to form a powder.

The upstream filter portion 41 and the suction filter portion 42 are, for example, Filter fibers such as cellulose acetate are formed into a cylindrical shape, and the upstream filter portion 41, the mouth filter portion 42, and the rectifying member 40 are integrally wound by the cigarette paper 45. The cigarette paper 45 used in the filter 4 may be a material with air permeability used in general products, or a material with no air permeability. The material of cigarette paper 45 is generally paper made of plant fibers, but it can also be a sheet of polymer-based (polypropylene, polyethylene, nylon, etc.) chemical fiber or a polymer-based sheet. It is also possible to use metal foils such as aluminum foil. In addition, the filter 4 can use a so-called non-wrapped filter. The so-called non-wrapped filter has a filter material and an outer skin layer formed by forming the filter material into a cylindrical shape, and the outer skin layer can be obtained by thermoforming the filter material. In the case of non-wrapped filters, cigarette paper can be omitted.

The suction port filter portion 42 located on the suction port end side is provided with a powder supply path 421 so as to penetrate the suction port filter portion 42 in the axial direction, and the cavity 43 and the suction port end are communicated through the powder supply path 421. The powder supply path 421 has a cross section that can suppress the intrusion of the powder-containing material 44 in a lump state. In addition, the rectifying member 40 is a member that is connected to the upstream side of the cavity 43 and rectifies the mainstream smoke flowing from the upstream side and guides it to the cavity 43. In more detail, the rectifying member 40 is connected between the upstream filter portion 41 and the cavity 43 in the axial direction. The rectifying member 40 has: a low ventilation resistance portion arranged in a part of the cross section from the front end surface to the rear end surface and having relatively low ventilation resistance; and a low ventilation resistance portion arranged in the other part of the cross section from the front end surface to the rear end surface and the ventilation resistance is lower than the ventilation resistance. A high ventilation resistance part with a high resistance part; and a member that guides mainstream smoke flowing from the upstream side through the low ventilation resistance part to the aforementioned cavity. In more detail, the rectifying member 40 has: axially penetrating the entire The hollow passage 400 of the flow member 40 is hollow; and the ventilation restricting portion 401 formed in an area other than the hollow passage 400; and the circulation of mainstream smoke is restricted in the ventilation restricting portion 401. In this case, the hollow passage 400 in the rectification member 40 corresponds to a low ventilation resistance part, and the ventilation restriction part 401 corresponds to a high ventilation resistance part. In addition, the so-called "restriction of the flow of mainstream smoke" means that the flow of mainstream smoke is not completely prohibited in the ventilation restricting portion 401 of the rectifying member 40, and the mainstream smoke may be allowed to circulate slightly through the ventilation restricting portion 401. That is, compared to the hollow passage 400 in the rectifying member 40, since the ventilation resistance of the ventilation restricting portion 401 is relatively larger, the amount of mainstream smoke circulating in the ventilation restricting portion 401 may actually be zero, or compared to the hollow passage. 400 is significantly reduced. The details of the hollow passage 400 and the ventilation restricting portion 401 in the powder supply passage 421 will be described later. In addition, the filter tip 4 is integrated with the cigarette rod 2 by rolling up the outer paper 3.

The outer layer paper 3 is generally made of plant fibers, but it can also be a sheet made of polymer-based (polypropylene, polyethylene, nylon, etc.) chemical fibers or a polymer-based sheet, or Metal foil such as aluminum foil is used. In addition, the filter 4 may contain flavors such as menthol. The method of adding the fragrance is not particularly limited, but it is known that, for example, adsorbing the fragrance, arranging a rope-like substance in the filter 4, or making the filler of the filter 4 contain the fragrance, or fixing the fragrance by capsules, etc. The material is arranged in the filter 4 method.

In the outer layer paper 3 and the cigarette paper 45 at the position corresponding to the upstream filter portion 41, a plurality of vent holes for introducing ventilation air (outside air) into the filter 4 to dilute the mainstream smoke are formed in a ring shape ( Hereinafter referred to as It is 31-shaped "upstream filter area vent"). The cigarette paper 45 can also be made of materials with no air permeability or low air permeability. In addition, by adjusting the opening area of the upstream filter region vents 31 (when a plurality of upstream filter region vents 31 are arranged, the total opening area), the Vf value (the total ventilation flow rate) can be adjusted. The proportion of air inflow from the filter). The tar value of the cigarette can be designed according to the Vf value, so that the powder formed by crushing the powder content 44 can be transported to the maximum.

The cavity 43 is a space formed inside the filter 4, to be more specific, is a cylindrical space surrounded by the surface of the rear end of the upstream filter portion 41, the surface of the front end of the mouthpiece filter portion 42, and the cigarette paper 45. The cavity 43 only needs to have a size in which the powder-containing material 44 can be set. When a plurality of powder-containing materials 44 are provided, the cavity 43 must be set to a size in which a plurality of powder-containing materials 44 can be set. In addition, the shape of the cavity 43 is not particularly limited.

The powder-containing material 44 is formed by forming the raw material powder into a single ball, and is formed into a powder by applying an external force. The so-called external force is a force stronger than the force applied during manufacture or transportation, or a force stronger than the suction force during smoking. The external force exemplifies the force applied by the smoker's fingers (the force of squeezing). For example, the powder-containing material 44 will form a powder with a breaking strength of 5N or more and 60N or less. Preferably, the breaking strength of the powder-containing material 44 to form a powder is 20N or more and 30N or less, and more preferably 20N or more and 25N or less. In addition, the shape of the powder-containing material 44 is not particularly limited, and may be an ellipsoid, a cylinder, a hollow cylinder, a cone, a pyramid, a toroidal curved body, a cube, a rectangular parallelepiped, or other polyhedrons, or a combination of these shapes. In addition, the raw material powder constituting the powder content 44 is capable of allowing at least a part of the powder to pass through The particle size of the supply path 421. For example, the particle size of the raw material powder can be set in the range of 10 μm to 300 μm.

The powder-containing material 44 can be manufactured by adding an appropriate amount of water to a nucleating agent as a raw material powder, mixing it, and then forming it, and then drying it. In addition, a binder may be added as a raw material of the powder-containing material 44. In addition, perfume may be added to the nucleating agent together with water. As for the nucleating agent, monosaccharides, disaccharides, polysaccharides or their derivatives can be used. For example, ketotriose (dihydroxyacetone), aldose (glyceraldehyde), ketotine (erythrulose), aldose (erythrose, threose), pentose, ketopenose ( Ribulose, xylulose), aldopentose (ribose, arabinose, xylose, lyxose), deoxysugar (deoxyribose), kethexose (psicose, fructose, sorbose, tower Glucose), aldhexose (allose, altrose, glucose, mannose, gulose, idose, galactose, talose), deoxysugar (fucose, fucose, Rhamnose), sedum ketoheptose, sucrose, lactose, maltose, trehalose, turanose, cellobiose, raffinose, melezitose, maltotriose, acarbose , Stachyose, glucose, starch (amylose, amylopectin), cellulose, dextrin, dextran, fructose, etc. These monosaccharides, disaccharides, polysaccharides or their derivatives can be used alone or in combination. Preferably, the nucleating agent is actually soluble in the oral cavity.

Moreover, as for the binder, water-soluble polymers such as dextrin, gelatin, gum arabic, polyvinyl alcohol, carboxymethyl cellulose, etc. can be used. The amount of the binder added is preferably 10% by weight or less relative to the nucleating agent.

The fragrance added to the nucleating agent is not particularly limited. Known fragrances can be used, but powder fragrances and oily fragrances are particularly suitable. Together. The main powder flavors include chamomile, fenugreek, menthol, peppermint, cinnamon, and vanilla. In addition, the main oily flavors include lavender, cinnamon, cardamom, celery, cloves, bitter tree, nutmeg, sandalwood, bergamot, geranium, honey flavor, rose oil, vanilla extract, lemon, orange, mint, Cinnamon, caraway, cognac, jasmine, chamomile, menthol, buckwheat flakes, ylang ylang oil, sage, spearmint, fennel, allspice, ginger, star anise, coriander, coffee, etc. These powdered fragrances and oily fragrances can be used alone or in combination. When powder fragrance is used, its particle size is preferably 500 μm or less. The fragrance is preferably liquid or actually dissolves in the oral cavity. In addition, the addition amount of the fragrance component is preferably 10% by weight or less with respect to the nucleating agent.

In terms of taste ingredients, citric acid, tartaric acid, sodium glutamate, neotame, thaumatin, stevia, sorbitol, xylitol, erythritol, aspartame, rutin, orange Cortin, oxalic acid, tannic acid, catechin, naringin, quinine, quinic acid, limonin, caffeine, capsaicin, vitamins, amino acids, polyphenols, algins, flavonoids , Lecithin, etc. The flavoring ingredients are preferably liquid or can actually dissolve in the oral cavity. The addition amount of the taste component is preferably 10 wt% or less with respect to the nucleating agent. In addition, the powder-containing material 44 may be a plastic capsule, a tablet-shaped body, or a granule in which the powder is enclosed.

Here, Fig. 3 is a schematic diagram of a cross-section of the suction filter portion 42 of the first embodiment. As shown in FIG. 3, the cross section of the powder supply path 421 in this embodiment is formed to have a windmill-shaped opening as a whole. More specifically, in the cross section of the suction filter portion 42, the powder is supplied The feed path 421 is formed by a central connecting portion 4210 located on the central side of the cross section of the suction port filter 42 and a plurality of holes 4211 extending from the central connection 4210 toward the outer side of the cross section of the suction filter 42. Here, the opening area of each hole 4211 is relatively larger than the opening area of the central connecting portion 4210.

The plurality of holes 4211 in the powder supply path 421 each have a blade shape, and extend radially from the central connection portion 4210 in mutually different directions. In addition, the tip of each hole 4211 (the end on the opposite side to the central connecting portion 4210) is arranged at a position separated from the cigarette paper 45 of the mouthpiece filter portion 42, and the tip of each hole 4211 is connected to the cigarette There are filter fibers forming the suction filter portion 42 between the papers 45. In the example shown in FIG. 3, the powder supply path 421 extends radially from the central connection portion 4210 with three holes 4211 toward the outer periphery. In addition, the opening width of each hole 4211 in the powder supply path 421 gradually expands from the base end (the end connected to the central connecting portion 4210) side toward the front end side. Therefore, the opening width of each hole 4211 in the powder supply path 421 on the side of the peripheral side area 4211a located on the outer side of the cross section of the suction filter portion 42 is opposite to the opening width of the center side area 4211b located on the center side of the cross section. The ground is wider (larger). The powder supply path 421 of the suction filter portion 42 configured as described above has a cross section that prevents the powder-containing material 44 from moving to the downstream of the cavity 43 by suppressing the entry of the spherical powder-containing material 44 that forms the raw material powder into one piece. . Specifically, the powder supply path 421 has a cross-sectional size smaller than the diameter of the bulk powder-containing material 44.

Next, the rectifying member 40 will be described. No. 4 Figure is a schematic view of a cross section of the rectifying member 40 of the first embodiment. As shown in FIG. 4, the rectifying member 40 is provided with a single hollow passage 400 coaxial with the central axis CL and having a circular cross section. Hereinafter, such an arrangement form of the hollow passage 400 is also referred to as a "single hole form". The rectifying member 40 may be a molded body such as resin or metal, and the hollow passage 400 may be formed in the molded body to form the other area as the ventilation restricting portion 401. In addition, the rectifying member 40 may be a center hole filter assembly in which filter fibers such as acetate fiber are formed into a cylindrical shape, and a through hole is formed in the center portion of the shaft, for example, similarly to the suction filter portion 42, for example. The hollow passage 400 has a cross section that can suppress the entry of the spherical powder-containing material 44 that forms the raw powder into one piece. Specifically, the diameter of the hollow passage 400 is designed to be larger than the diameter of the one-piece powder-containing material 44. Small size.

<effect>

In the cigarette 1 of the present embodiment, the powder supply path 421 of the mouth filter 42 has a cross section through which the block-like powder content 44 cannot pass. Therefore, the agglomerated powder-containing material 44 arranged in the cavity 43 does not pass through the powder supply path 421, so that the agglomerated powder-containing material 44 can be prevented from passing through the powder supply path 421 to be discharged to the outside of the filter 4. On the other hand, since the smoker applies an external force or the like to crush the block-shaped powder-containing material 44 to form the powder-containing material 44 into a powder form, the powder of the powder-containing material 44 can pass through the powder supply path 421. As a result, the smoker can easily inhale the powder at any desired time point, and can obtain the taste produced by the taste component and the fragrance produced by the fragrance component, or both.

In addition, in the filter 4 of this embodiment, a rectifying member 40 is connected to the upstream side of the cavity 43. According to the rectifying member 40 of this embodiment, a hollow passage 400 for guiding mainstream smoke to the cavity 43 is provided in a part of the cross section extending in the axial direction, and the other part is provided with a means for restricting the mainstream smoke. The ventilation restricting portion 401 for ventilation can concentrate mainstream smoke in a specific area in the cross section of the cavity 43 for rectification. Thereby, the flow velocity of mainstream smoke in the hollow passage 400 can be increased. Moreover, by guiding the high-speed mainstream smoke whose flow rate is increased by the hollow passage 400 into the cavity 43, the powder of the powder-containing material 44 accumulated in the cavity 43 can be effectively rolled up and filtered through the suction port of the latter stage. The powder supply path 421 of the part 42 efficiently conveys the powder of the powder-containing material 44.

In addition, in the present embodiment, the hollow passage 400 in the rectifying member 40 is made into a single-hole form as shown in FIG. 5. Therefore, the cross-sectional area of the hollow passage 400 is not too small, and the hollow cross-section can be ensured to have a certain size. Therefore, although the mainstream smoke flowing through the hollow passage 400 has a high speed, it is possible to prevent the flow rate from becoming too small. As a result, the high-speed mainstream smoke can be guided into the cavity 43 at a certain level of flow rate, so that the mainstream smoke that is strong enough to wind up the powder of the powder-containing material 44 accumulated in the cavity 43 can be supplied to the cavity. 43, and effectively transport the powder of the powder-containing material 44. In addition, the form of the hollow passage 400 in the rectifying member 40 is not limited to the single hole form described above, and various forms can be adopted. In addition, other implementation aspects of the hollow road 400 will be described later.

Moreover, according to the filter 4 of this embodiment, since the rectifying member 40 is connected upstream of the cavity 43, the powder in the cavity 43 can be lifted. The conveying efficiency of the powder containing the material 44, so there is no need to provide a plurality of vent holes (hereinafter referred to as " Vent holes in the cavity area"). Thereby, the strength of the cavity 43 can be increased, and it is not easy to bend.

However, a cavity area vent can also be provided on the side of the cavity 43. In this case, the cigarette paper 45 is made of a material with high air permeability. Therefore, the vent hole in the cavity area does not penetrate the cigarette paper 45, but the vent hole formed in the cavity area of the outer paper 3 can be brought from the outside. The incoming air penetrates to the inside of the cavity 43. Thereby, the strength of the cigarette paper 45 is increased, and it is not easy to bend. In addition, the cigarette paper 45 can also be made of a material with no air permeability or a material with low air permeability. In this case, it is better to open the vent hole in the cigarette paper 45 at a position corresponding to the vent hole in the cavity area. In addition, the outer layer paper 3 preferably uses a pre-opened outer layer paper with vent holes formed in the cavity area in advance. By this, compared to the case where the cavity area vent is formed by, for example, an on-board laser, there is no concern that the powder-containing material 44 arranged in the cavity 43 will be damaged.

Furthermore, according to the powder supply path 421 of this embodiment, the plurality of holes 4211 extend in different directions toward the outer periphery from the central connecting portion 4210 located on the center side of the cross section of the suction filter portion 42 as a starting point. Here, it is advantageous from the viewpoint that the more the cross-sectional area of the powder supply path 421 increases, the more the conveying amount (supply amount) of the powder at the time of smoking by the smoker increases, but it is only to increase the cross-sectional area of the powder supply path 421. It is also easy to cause smokers to accidentally scatter the powder (soot fall) when they do not smoke. The above unexpected drop of soot can be listed, for example, when the smoker does not hold the filter 4 In this state, when the filter 4 is held in a posture with the suction port side facing downward, the powder may fall to the outside through the powder supply path 421, etc.

In contrast, according to the powder supply path 421 of the present embodiment, by extending a plurality of holes 4211 in different directions from the central connecting portion 4210 located on the center side of the cross section of the suction filter portion 42 toward the peripheral side, it is possible to In the cross section of the suction port filter 42, the opening regions are not concentrated in one place, but are arranged dispersedly on the outer peripheral side. Therefore, after crushing the bulk powder-containing material 44 to form a powder, it is possible to ensure a total open area sufficient to ensure the conveyance (supply amount) of the powder during inhalation, and prevent unexpected powder during non-inhalation. The soot falls. In particular, in the powder supply path 421 of this embodiment, a plurality of holes 4211 extend radially from the central connecting portion 4210 toward the outer periphery. Therefore, the opening area can be more appropriately distributed in the cross section of the suction filter portion 42 , And can appropriately prevent the powder-containing material 44 from falling off unexpectedly after crushing, and it is easier to further ensure the conveying amount of the powder when inhaling.

Here, when the smoker grabs the filter 4 of the cigarette 1 and inhales it, the powder of the pulverized powder content 44 in the cavity 43 is accumulated on the outer side of the cavity 43 (cigarette paper 45). Therefore, although a large number of opening areas of the powder supply path 421 are dispersed on the outer peripheral side of the suction port filter portion 42, it is advantageous from the viewpoint of increasing the amount of powder conveyed at the time of inhalation. In contrast, according to the powder supply path 421 of this embodiment, since the central connecting portion 4210 is made relatively small, and the opening area of each hole 4211 is formed larger than that of the central connecting portion 4210, the suction can be increased. Taste the amount of powder shipped. In addition, the outside of each hole 4211 in the powder supply path 421 The opening width of the surrounding side area 4211a is relatively wider than that of the center side area 4211b, and therefore it is easier to ensure the size of the opening area on the outer side of the cross section of the suction filter portion 42. As a result, it is possible to further increase the amount of powder transported during inhalation.

In addition, the tip of each hole 4211 in the powder supply path 421 is separated from the cigarette paper 45 of the mouth filter 42, and filter fibers are present between the tip of each hole 4211 and the cigarette paper 45. In this way, the hole 4211 is formed so that the tip of the hole 4211 does not extend to contact with the cigarette paper 45, whereby the edge (outermost peripheral portion) of the mouthpiece filter 42 does not form an opening, and therefore it is possible to further suppress non-irritability. Unexpected soot drop when inhaling.

In addition, in the powder supply path 421 of this embodiment, the base ends of a plurality of holes 4211 are connected to each other by a central connecting portion 4210, and a continuous opening is formed. Therefore, when manufacturing the suction port filter portion 42, a single mandrel can be used to manufacture the suction port filter portion 42, and the region of the cross section of the suction port filter portion 42 except for the powder supply path 421 can be uniformly filled with filter fibers. That is, the manufacturing quality of the suction port filter portion 42 can be stabilized. In addition, the form of the powder supply path 421 in the suction filter part 42 is not limited to the windmill form shown in FIG. 3, and various forms can be adopted. In addition, other implementation aspects of the powder supply path 421 will be described later.

In addition, it is preferable that the cigarette paper 45 of the filter 4 is selected in a style that is unlikely to be bent or wrinkled when the smoker applies an external force to the lumpy powder content 44 to crush it. For example, the basis weight of the cigarette paper 45 is preferably 50 to 200 g/m ² , and it is more desirable to determine it in the range of 50 to 110 g/m ^2. In addition, the air permeability of the cigarette paper 45 is preferably set to 1,000 to 10,000 [CU]. In addition, the total length of the filter 4, the length of the upstream filter portion 41, the rectifying member 40, the cavity 43, and the suction filter portion 42 are not particularly limited.

<Example>

Next, the present invention will be explained more specifically using examples, but the present invention is not limited to the description of the following examples as long as it does not exceed the gist. The cigarettes 1 of Examples 1 to 4 with different hollow paths 400 in the rectifying member 40 in the filter 4 and control cigarettes not provided with the rectifying member 40 were produced, and a test for measuring the amount of powder transported when inhaled was performed. In the filter 4 of each embodiment, the length of the upstream filter portion 41 is 9 mm, the length of the rectifying member 40 is 5 mm, the length of the cavity 43 is 6 mm, and the length of the suction filter portion 42 is 7 mm. . In addition, it is assumed that the powder-containing material 44 is crushed, and the raw material powder of the powder-containing material 44 is contained in the cavity 43. For the raw material powder of the powder-containing material 44, 50 mg of lactose (Pharmatose 100M manufactured by DFE Pharma) was used. In addition, for the filter in the control cigarette, the length of the upstream filter portion 41 is 14 mm, the length of the cavity 43 is 6 mm, and the length of the mouth filter portion 42 is 7 mm. In addition, the filter of the control cigarette is not provided with the rectifying member 40, but the upstream filter portion 41, the cavity 43, and the mouth filter portion 42 are arranged side by side in the axial direction.

Fig. 6 shows a list of the rate of change in the powder delivery amount relative to the control cigarette in each example. The rate of change in the powder conveyance amount referred to herein refers to the ratio of the powder conveyance amount of each example when the powder conveyance amount in the control cigarette is used as a reference.

Figures 7A and 7B show cross-sections of the rectifying member 40 of each embodiment. Example 1 is a "single hole form", Example 2 is a "three hole form", Example 3 is a "12 hole form", and Example 4 is a "peripheral 12 groove form". In the "single hole type" of the first embodiment, a single hollow passage 400 with a circular cross section is provided at the center of the transverse section of the rectifying member 40, and the cross-sectional area of the opening is 6.0 mm ² . In addition, in the "three-hole form" of the second embodiment, three circular cross-sectional hollow paths 400 are provided at a constant interval of 120° in the circumferential direction in the area close to the outer periphery of the rectifying member 40. The total cross-sectional area of the openings is It is 5.3mm ² . In addition, the "12-hole form" of the third embodiment is that 12 hollow passages 400 with circular cross-sections are provided at a constant pitch of 30° along the circumferential direction on the peripheral part of the transverse cross-section of the rectifying member 40. The total cross-sectional area It is 6.2mm ² . In addition, the "peripheral 12 groove form" of the fourth embodiment is that 12 hollow paths 400 with a semicircular groove shape are provided at a fixed interval of 30° in the peripheral part of the rectifying member 40 along the circumferential direction. The total number of openings is The cross-sectional area is 9.2mm ² . In addition, Examples 1 to 4 and the powder supply path 421 of the mouth filter 42 of the control cigarette are all in a common pattern, and adopt the cross section of the windmill shape shown in FIG. 3.

The smoking machine shown in Fig. 8 was used to measure the powder delivery amount. In this example, a smoking machine manufactured by Borgwaldt Co., Ltd., which can hold one cigarette, was used to conduct a smoking experiment without ignition, and to measure the powder delivery amount. The inhalation experiment was performed by setting the inhalation flow rate to 35 mL/2 seconds, the number of inhalation times to five, and the number of measurements to be five. In addition, the powder delivery amount is calculated by removing the powder collection pad (Cambridge Pad) every time you inhale, and then measure the weight with an electronic scale, and calculate from the weight difference before and after the inhalation.

As shown in Fig. 6, it can be confirmed in all Examples 1 to 4 that the powder transport volume will increase compared with the control cigarette without the rectifying member 40. plus. In particular, if Example 1 (single hole type) is compared with Example 2 (three hole type), even though the total cross-sectional area of the openings of Example 2 (three hole type) is relatively lower than that of Example 1 (single hole type) Smaller, the increase rate of powder delivery is still larger. This can be presumed to be that by providing the hollow passage 400 of the rectifying member 40 of Example 2 (three-hole form) in the region on the peripheral side of the cross-section of the rectifying member 40, the air flow is concentrated and effectively accumulated on the periphery of the cavity. The effect produced by the collision of the lactose powder on the cigarette paper.

<Modifications>

Next, the relationship between the hollow passage 400 of the rectifying member 40 in the filter 4 of the first embodiment and the powder supply passage 421 in the suction filter portion 42 will be described. Fig. 9A is a longitudinal sectional view of the filter 4A of the cigarette 1A of Modification 1. FIG. 9B is a cross-sectional view of the rectifying member 40 of the filter 4A of Modification 1. FIG. FIG. 9C is a cross-sectional view of the mouth filter portion 42 of the filter 4A of Modification 1. FIG. As shown in Figs. 9A to 9C, the filter 4A of Modification 1 has the hollow passage 400 of the rectifying member 40 and the powder supply passage 421 in the suction filter portion 42 formed in the center of the cross section of the filter 4A "Single hole form". Furthermore, in the filter 4A, the hollow passage 400 of the rectification member 40 and the powder supply passage 421 in the suction filter portion 42 are arranged at positions corresponding to each other in the cross section of the filter 4A. In this way, by arranging the hollow passage 400 of the rectification member 40 and the powder supply passage 421 in the suction filter portion 42 to face each other, the main flow that passes through the hollow passage 400 in the rectification member 40 and is guided to the cavity 43 can be rectified. The smoke (air flow) is smoothly guided to the powder supply path 421 arranged opposite to the hollow path 400, so that The powder of the powder-containing material 44 accumulated in the cavity 43 is effectively transported along with the flow of mainstream smoke.

Fig. 10A is a longitudinal sectional view of the filter 4B of the cigarette 1B of Modification 2. FIG. 10B is a cross-sectional view of the rectifying member 40 of the filter 4B of Modification 2. FIG. FIG. 10C is a cross-sectional view of the mouthpiece filter portion 42 of the filter 4B of Modification 2. FIG. As shown in FIGS. 10A to 10C, in the filter 4B of Modification 2, the hollow passage 400 of the rectifying member 40 and the powder supply passage 421 in the suction filter portion 42 are both formed in a "three-hole form". Furthermore, in Modification 2, the hollow passage 400 of the rectifying member 40 and the powder supply passage 421 in the suction filter portion 42 are also arranged at corresponding positions in the cross section of the filter 4B, so that it can be deposited in the cavity. The powder of 43 powder content 44 is effectively transported with the flow of mainstream smoke.

FIG. 11A is a longitudinal cross-sectional view of the filter 4C of the cigarette 1C of Modification 3. FIG. FIG. 11B is a cross-sectional view of the rectifying member 40 of the filter 4C of Modification 3. FIG. FIG. 11C is a cross-sectional view of the mouth filter portion 42 of the filter 4C of Modification 3. FIG. As shown in Figs. 11A to 11C, the filter 4C of Modification 3 has the hollow passage 400 of the rectification member 40 formed in a "three-hole form", and the powder supply passage 421 in the suction filter portion 42 is formed in a "single hole" form. Hole form". Therefore, in Modification 3, the hollow passage 400 of the rectifying member 40 and the powder supply passage 421 in the suction filter portion 42 are arranged at positions that do not correspond to each other in the cross section of the filter 4C. In this way, by disposing the hollow passage 400 of the rectifying member 40 and the powder supply passage 421 in the suction filter portion 42 not facing each other, the main flow passing through the hollow passage 400 in the rectifying member 40 is rectified and guided to the cavity 43 The flow of smoke (air flow) is temporarily in the cavity 43 The powder of the powder-containing material 44 accumulated in the cavity 43 can be easily rolled up, so that the powder of the powder-containing material 44 can be effectively transported along with the flow of mainstream smoke.

FIG. 12A is a longitudinal sectional view of the filter 4D of the cigarette 1D of Modification 4. FIG. FIG. 12B is a cross-sectional view of the rectifying member 40 of the filter 4D of Modification 4. FIG. FIG. 12C is a cross-sectional view of the mouthpiece filter portion 42 of the filter 4D of Modification 4. FIG. As shown in FIGS. 12A to 12C, in the filter 4D of Modification 4, the hollow passage 400 of the rectifying member 40 is formed in an "8-hole form", and the powder supply path 421 in the suction filter portion 42 is formed in the form of " Three-hole form". Furthermore, in Modification 4, the hollow passage 400 of the rectification member 40 and the powder supply passage 421 in the suction filter portion 42 are arranged at positions that do not correspond to each other in the cross section of the filter 4D, so that the rectification member 40 can be passed through. The flow of mainstream smoke (airflow) that is rectified by the hollow passage 400 and guided to the cavity 43 is temporarily disturbed in the cavity 43. As a result, the powder of the powder-containing material 44 accumulated in the cavity 43 can be easily rolled up, and the powder of the powder-containing material 44 can be effectively transported along with the flow of mainstream smoke.

In addition, the rectification member 40 in the above-mentioned embodiment and modification examples may be formed of a filter material shaped like a rod. In this way, when the rectifying member 40 is formed of a rod-shaped filter material, in the cross section of the filter material, the filter material density of the portion corresponding to the hollow passage 400 may be relatively low, and the part corresponding to the airflow resistance may be formed as a low ventilation resistance portion. The filter material density of the portion of the restricting portion 401 is relatively high to form a high ventilation resistance portion. Thereby, the mainstream smoke flowing from the upstream can preferentially pass through the low ventilation resistance portion of the rectifying member 40, and the mainstream smoke is rectified and introduced into the cavity 43 at the same time. As mentioned above, the shape is When the rod-shaped filter material forms the rectification member 40, there is an advantage that the rectification member 40 can be manufactured easily and at low cost. In addition, when the rectifying member 40 is made to function as a filter medium for filtering mainstream smoke as described above, the arrangement of the upstream filter portion 41 can be omitted, and therefore the number of steps in the manufacturing process can be reduced. In addition, even when the upstream filter portion 41 is omitted in this way, since the filter material is arranged on the entire cross section of the rectifying member 40, it is possible to suppress particles such as the cut tobacco 21 of the tobacco rod 2 on the upstream side of the rectifying member 40. The powdery and powdery objects enter a place further downstream than the rectifying member 40.

The preferred embodiments of the present invention have been described above, but the filter for smoking articles of the present invention can be implemented by combining various embodiments as much as possible.

1‧‧‧Cigarette

2‧‧‧Tobacco rod

3‧‧‧Outer paper

4‧‧‧Filter

21‧‧‧Tobacco

22‧‧‧roll paper

31‧‧‧Vent

40‧‧‧Rectifying component

41‧‧‧Upstream filter

42‧‧‧Suction filter

43‧‧‧cavity

44‧‧‧Powder content

45‧‧‧Cigarette paper

400‧‧‧Hollow part

401‧‧‧Ventilation Restriction Department

421‧‧‧Powder supply path

CL‧‧‧Central axis

Claims (11)

A smoking article comprising: a tobacco rod containing shredded tobacco; and a filter connected to the end of the tobacco rod via an outer layer of paper, the filter having: a powder content that contains at least one of a flavoring component and a flavor component Any one of the raw material powders is formed into one piece, and the powder is formed by applying an external force; the cavity is equipped with the aforementioned powder content; the rectifying member is connected to the upstream side of the aforementioned cavity and is opposite from the upstream The mainstream smoke flowing from the side is rectified and guided to the aforementioned cavity; and the suction filter part is connected to the downstream side of the aforementioned cavity, and a powder supply path is formed along the axial direction. The cavity is in communication with the mouth end and is used to supply the powder from the cavity to the mouth end; the rectifying member has: from the front end surface to the rear end surface is arranged in a part of the cross section and the ventilation resistance is relatively low A low ventilation resistance part; and a high ventilation resistance part arranged in the other part of the cross section from the front end surface to the rear end surface and the ventilation resistance is higher than the aforementioned low ventilation resistance part; and the aforementioned rectifying member is configured to be placed in the aforementioned low ventilation resistance part The mainstream smoke with an increased flow rate is guided to the cavity, so that the powder accumulated in the cavity is rolled up. The smoking article described in claim 1, wherein the rectifying member has: a hollow path penetrating the rectifying member in the axial direction; and a ventilation restricting portion formed in an area outside the hollow path and restricting the flow of mainstream smoke The aforementioned hollow path corresponds to the aforementioned low ventilation resistance portion, and the aforementioned ventilation restriction portion corresponds to the aforementioned high ventilation resistance portion. The smoking article according to claim 1, wherein the rectifying member is formed of a rod-shaped filter material, and the filter material density of the low ventilation resistance portion is lower than that of the high ventilation resistance portion. The smoking article according to any one of items 1 to 3 in the scope of patent application, wherein the powder supply path has a cross section capable of suppressing the entry of the powder-containing material in a lump. The smoking article according to any one of items 1 to 3 in the scope of the patent application, wherein the low ventilation resistance portion in the rectifying member and the powder supply path in the suction filter portion are arranged on the side of the filter. The corresponding position in the profile. The smoking article according to any one of items 1 to 3 in the scope of the patent application, wherein the low ventilation resistance portion in the rectifying member and the powder supply path in the suction filter portion are arranged on the side of the filter. The position in the section that does not correspond to it. The smoking article according to any one of items 1 to 3 in the scope of the patent application, wherein the low ventilation resistance portion is arranged in an area on the outer peripheral side of the cross section of the rectifying member. The smoking article described in claim 7, wherein a plurality of the low-ventilation resistance portions are arranged in the region on the outer peripheral side of the rectifying member. The smoking article described in claim 8, wherein a plurality of the low ventilation resistance portions are arranged at regular intervals along the circumferential direction of the region on the peripheral side of the rectifying member. The smoking article according to any one of the first to third items of the scope of patent application, wherein the low ventilation resistance portion is arranged in the central area of the cross section of the rectifying member. A filter for smoking articles is provided with: a powder content, a raw material powder containing at least any one of a flavoring component and a flavoring component is formed into one piece, and the powder is formed by applying an external force; a cavity, The powder-containing substance rectifying member is arranged, which is connected to the upstream side of the cavity, and rectifies the mainstream smoke flowing from the upstream side to guide it to the cavity; and the suction filter part is connected to the cavity. A powder supply path is formed on the downstream side of the cavity and along the axial direction. The powder supply path connects the The cavity is in communication with the suction port end and is used to supply the powder from the cavity to the suction port end; the rectifying member has: from the front end surface to the rear end surface, it is arranged in a part of the cross section and has a relatively low ventilation resistance. The ventilation resistance part; and the high ventilation resistance part arranged in the other part of the cross section from the front end surface to the rear end surface and the ventilation resistance is higher than the aforementioned low ventilation resistance part; and the aforementioned rectifying member is configured to be in the aforementioned low ventilation resistance part The mainstream smoke with an increased flow rate is guided to the cavity, so that the powder accumulated in the cavity is rolled up.

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