WO2016151683A1

WO2016151683A1 - Smoking article filter and smoking article

Info

Publication number: WO2016151683A1
Application number: PCT/JP2015/058512
Authority: WO
Inventors: 麻依高瀬
Original assignee: 日本たばこ産業株式会社
Priority date: 2015-03-20
Filing date: 2015-03-20
Publication date: 2016-09-29
Also published as: TW201637579A

Abstract

Provided is a technology whereby, in a smoking article filter, a dye-containing colored liquid added to a core part side can be prevented from oozing out to a sheath side part. A smoking article filter provided with a filter segment disposed so that the rear end face thereof is exposed to the mouthpiece side, wherein the cross sectional structure of the filter segment comprises: a core part to which a dye-containing colored liquid is added so as to color a filter material; a sheath part comprising a filter material which is formed so as to cover the outer periphery of the core part; and a liquid-impermeable barrier layer which is disposed at the boundary part between the core part and the sheath part.

Description

Filter for smoking article and smoking article

The present invention relates to a filter for smoking articles and a smoking article.

¡Filter cigarettes with a filter provided on the mouth side of the cigarette are widely known for smoking articles. In the filter cigarette, a filter is connected to one end of a cigarette rod, in which a cigarette is wound with a wrapping paper, via a chip paper. Such a filter for smoking articles is formed by wrapping a filter medium such as acetate tow with a wrapping paper.

In recent years, a technique for providing a filter for smoking articles having excellent design properties has been desired. In relation to this, a colored tobacco filter containing a colorant, a plasticizer, and a solvent in a filter material has been proposed (see, for example, Patent Document 1). And this patent document 1 arrange | positions the core part and sheath part which consist of a fiber tow concentrically as a tobacco filter of the sheath core structure which consists of multiple layers, and colors one or both of a core part and a sheath part. It is disclosed.

JP 2003-174862 A

However, in a filter having a conventional seascore structure, there is a possibility that the colorant added to the core portion may ooze out to the sheath portion side.

The present invention has been made in view of such circumstances, and in a filter for a smoking article, a technique capable of suppressing a coloring liquid containing a dye added to the core part side from exuding to the sheath part side. The purpose is to provide.

In order to solve the above-mentioned problem, the filter for smoking articles according to the present invention is colored by adding a coloring liquid containing a dye to the filter segment arranged so that the rear end face is exposed to the mouth end side. A barrier layer having liquid impermeability is formed at the boundary between the core portion thus formed and the sheath portion disposed outside the core portion.

More specifically, the present invention is a filter for a smoking article, and includes a filter segment arranged so that a rear end surface is exposed to a mouth end side, and the cross-sectional structure of the filter segment is a coloring containing a dye. Arranged at the boundary portion between the core portion and the sheath portion, the core portion colored by adding the liquid, the sheath portion having the filter material formed so as to cover the outer periphery of the core portion And a barrier layer having liquid impermeability.

According to such a cross-sectional structure, the colored liquid added to the filter material in the core part is prevented from oozing out to the sheath part side by the barrier layer having liquid impermeability. Thereby, a colored liquid can be stably hold | maintained (fastened) in a core part. Therefore, in the cross section of the downstream filter segment, it is possible to prevent the boundary between the colored region (that is, the core portion) and the sheath portion from being ambiguous or blurred. As a result, it is possible to provide a filter having excellent design properties and a cigarette equipped with the filter.

In the present invention, the barrier layer may be a sheet member having liquid impermeability.

Further, the coloring liquid added to the core part may contain a fragrance.

The filter may further include an upstream filter segment disposed on the upstream side of the filter segment disposed such that the rear end surface is exposed to the mouth end side.

Further, the coloring liquid added to the core part contains a fragrance, and a vent hole for introducing air into the filter is formed in the chip paper around which the filter is wound. The rear end face may be provided at a position upstream of the filter segment arranged so as to be exposed to the mouth end side.

Further, the vent hole may be provided in a portion of the chip paper where the upstream filter segment is wound.

Further, the filter segment arranged so that the rear end surface is exposed to the mouth end side has a winding paper for winding the filter material of the sheath portion, and the winding paper extends rearward from the rear end surface. A recess may be formed at the mouth end of the filter by being wound around the filter segment.

Further, the present invention may be a smoking article provided with any of the filters described above. That is, the present invention is a smoking article including a filter, the filter including a filter segment disposed so that a rear end surface is exposed to a mouth end side, and the cross-sectional structure of the filter segment includes a dye. A core portion in which the filter material is colored by adding a coloring liquid, a sheath portion having a filter material formed so as to cover an outer periphery of the core portion, and a boundary portion between the core portion and the sheath portion And a barrier layer having liquid impermeability.

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

According to the present invention, in the filter for smoking articles, it is possible to provide a technique capable of suppressing the coloring liquid containing the dye added to the core part side from seeping out to the sheath part side.

FIG. 1 is a perspective view of a cigarette according to the first embodiment. FIG. 2 is an exploded view showing a schematic structure of the cigarette according to the first embodiment. FIG. 3 is a diagram illustrating a cross-sectional structure of the cigarette according to the first embodiment. FIG. 4 is a diagram illustrating a cross-sectional structure of the downstream filter segment according to the first embodiment. FIG. 5 is a diagram illustrating the filter manufacturing apparatus according to the first embodiment. FIG. 6 is a diagram illustrating the flow of mainstream smoke flowing through the filter according to the first embodiment. FIG. 7 is a diagram illustrating a filter according to a modification. FIG. 8A is a diagram showing a cross-sectional structure of a downstream filter segment according to a modification. FIG. 8B is a diagram showing a cross-sectional structure of a downstream filter segment according to a modification. FIG. 8C is a diagram showing a cross-sectional structure of a downstream filter segment according to a modification. FIG. 8D is a diagram showing a cross-sectional structure of a downstream filter segment according to a modification.

Here, an embodiment of a filter for smoking articles according to the present invention will be described based on the drawings. Further, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the present embodiment are not intended to limit the technical scope of the invention only to those unless otherwise specified. Absent.

<Embodiment 1>
FIG. 1 is a perspective view of a cigarette 1 that is an example of a smoking article according to Embodiment 1. FIG. FIG. 2 is an exploded view showing a schematic structure of the cigarette 1 according to the first embodiment. FIG. 3 is a diagram illustrating a cross-sectional structure of the cigarette 1 according to the first embodiment. 2 and 3 show a part of the cigarette 1. The cigarette 1 has a cigarette rod 2 and a filter 4 connected to one end of the cigarette corod 2 via a chip paper (chip paper) 3. The tobacco rod 2 is obtained by winding a tobacco cut 21 with a wrapping paper 22. The tobacco rod 2 and the filter 4 are formed in a columnar shape (bar shape). An arrow A in FIG. 1 indicates a longitudinal axis direction of the cigarette 1 (the tobacco rod 2 and the filter 4). In the present specification, a cross section orthogonal to the longitudinal axis of the cigarette 1 (cigarette rod 2, filter 4) is referred to as a “cross section”.

The filter 4 is a member for filtering smoke components contained in mainstream smoke generated when the cigarette 1 is smoked. The filter 4 according to the present embodiment is a so-called multi-segment filter including a plurality of

filter segments

5 and 6. Hereinafter, the end of the filter 4 that is connected to the tobacco rod 2 is referred to as a “connection end 4a”, and the end opposite to the connection end 4a is referred to as a “mouth end 4b”. The mouth end 4b of the filter 4 is an end portion of the filter 4 that is received by the smoker when the cigarette 1 is smoked. Mainstream smoke generated in the cigarette rod 2 during smoking of the cigarette 1 flows into the filter 4 from the connection end 4a, sequentially passes through the

filter segments

5 and 6, and is then sucked into the oral cavity from the

filter segments

5 and 6. Hereinafter, the upstream side and the downstream side of the filter 4 may be defined based on the direction in which the mainstream smoke flows in the filter 4. That is, the connection end 4 a is the “upstream end” of the filter 4, and the suction end 4 b is the “downstream end” of the filter 4.

In the present embodiment, the filter 4 has a filter segment 5 arranged on the connection end 4 a side, and a filter segment 6 connected to the downstream side of the filter segment 5. Hereinafter, the filter segment 5 positioned on the upstream side of the filter 4 is referred to as “upstream filter segment 5”, and the filter segment 6 positioned on the downstream side is referred to as “downstream filter segment 6”.

The upstream filter segment 5 includes a cylindrical filter material 51 and a plug wrap 52 that winds up the outer periphery of the filter material 51. The filter material 51 is, for example, a filter tow obtained by forming cellulose acetate fibers into a cylindrical shape. The plug wrap 52 is a winding paper having the same width as the axial length of the filter material 51 in the unfolded state, and is wound so as to cover the entire outer peripheral surface of the filter material 51.

FIG. 4 is a diagram showing a cross-sectional structure of the downstream filter segment 6. The downstream filter segment 6 has a double coaxial structure filter material including a core portion 61 and a sheath portion 62. The core part 61 and the sheath part 62 are filter tow which shape | molded the cellulose acetate fiber, for example. The central axis of the core part 61 and the sheath part 62 is coaxial with the central axis of the filter 4 so that the small diameter core part 61 is wrapped by the large diameter sheath part 62, and the sheath part 62 is on the outer peripheral side of the core part 61. Are arranged coaxially. In the present embodiment, a liquid impervious sheet 63 having liquid impermeability is formed as a barrier layer on the boundary surface between the core part 61 and the sheath part 62 in the downstream filter segment 6. And the core part 61 is comprised as a colored filter material colored by adding the coloring liquid containing dye and a fragrance | flavor. The outer diameter of the sheath portion 62 is equal to the outer diameter of the upstream filter segment 5, and the outer peripheral surface of the sheath portion 62 is wound up by the plug wrap 64. The plug wrap 64 is a winding paper having the same width as the axial length of the core portion 61 and the sheath portion 62 in the unfolded state, and is wound so as to cover the entire outer peripheral surface of the sheath portion 62.

Further, as shown in FIG. 3, the upstream filter segment 5 and the downstream filter segment 6 are wound up by the forming paper 7, thereby forming the filter 4 integrally. The formed paper 7 is a web having the same width as the sum of the axial lengths of the upstream filter segment 5 and the downstream filter segment 6 in the unfolded state, and the entire outer periphery of the upstream filter segment 5 and the downstream filter segment 6 (that is, The entire outer periphery of the filter 4 is wound.

As shown in FIG. 3, the front end surface of the upstream filter segment 5 in the filter 4 is disposed at the connection end 4a, and the rear end surface of the downstream filter segment 6 is disposed at the mouth end 4b. Hereinafter, the rear end face in the downstream filter segment 6 may be referred to as a “suction side end face”.

The chip paper 3 that integrally connects the tobacco rod 2 and the filter 4 covers the entire outer periphery of the molding paper 7 of the filter 4 and covers the end of the wrapping paper 22 in the tobacco rod 2. Bonded to the web 22. A vent hole 31 for introducing outside air (air) for diluting mainstream smoke into the filter 4 is formed in an area of the chip paper 3 that covers the filter 4. The ventilation holes 31 are so-called ventilation outside air introduction holes, and a plurality of ventilation holes 31 are provided in the chip paper 3. In the example shown in FIGS. 1 to 3, the vent hole 31 is disposed in the axial direction of the filter 4 so as to be associated with the outer peripheral position of the upstream filter segment 5.

In the present embodiment, the forming paper 7 and the plug wrap 52 in the filter 4 are wound paper having air permeability. The air introduced from the vent hole 31 of the chip paper 3 is introduced into the filter 4 by passing through the plug wrap 52. The vent hole 31 in the chip paper 3 is not an essential configuration, and the installation mode of the vent hole 31 can be changed as appropriate.

Next, an example of a method for manufacturing the downstream filter segment 6 according to the first embodiment will be described with reference to FIG. The filter manufacturing apparatus 100 shown in FIG. 4 includes a sheath part supply system 110 for forming the sheath part 62 in the downstream filter segment 6, a core part supply system 120 for forming the core part 61, a converging part 130, It has the 2nd winding machine 140 grade | etc.,.

The sheath part supply system 110 supplies, for example, a sheath part tow 111 made of cellulose acetate fiber to the converging part 130. In the illustrated example, the sheath part tow 111 fed out from the storage container 112 is After passing through the spreader 113, it is sent to the converging unit 130. The sheath portion tow 111 is uniformly opened by the spreader 113 and pulled out by the deli berry roll 114. On the other hand, the core part supply system 120 supplies, for example, a core part tow 121 made of cellulose acetate fiber to the converging part 130. In the illustrated example, the core part tow 121 is fed from the storage container 122. Is sent to the converging unit 130 after passing through the spreader 123. The core portion tow 121 is uniformly spread by the spreader 123 and pulled out by the deli berry roll 124.

A spray nozzle 115 for injecting triacetin, which is a plasticizer, to the sheath portion tow 111 and the core portion tow 121 on the upstream side of the delivery rolls 114 and 124 in the sheath portion supply system 110 and the core portion supply system 120. , 125 are provided. The toe 111 for the sheath part and the toe 121 for the core part to which triacetin has been added are imparted with adhesiveness due to the fiber dissolution effect of triacetin.

Between the delivery roll 124 and the converging unit 130 in the core supply system 120, a colored liquid adder 126, a converging pipe 127, and a first winding machine 128 are disposed.

As shown in the figure, the colored liquid adder 126 is an apparatus that adds a colored liquid containing a dye to the core tow 121. As described above, in the downstream filter segment 6 disposed on the suction end 4b side of the filter 4, the core portion 61 disposed on the inner side of the cross section is a colored filter material. The filter manufacturing apparatus 100 colors the core part tow 121 by adding a coloring liquid containing a dye and a fragrance to the core part tow 121 by the coloring liquid adder 126. The color to be colored on the core portion toe 121 is not particularly limited. However, in this embodiment, the colored liquid is not added to the sheath part 62 having the white filter material, but the colored liquid is added only to the core part 61 so that the downstream filter segment 6 is a multicolor filter. In order to form, a coloring liquid containing a dye other than white is added to the core portion 61.

A converging tube 127 is disposed after the colored liquid adder 126. The converging tube 126 is a device that forms the core tow 121 to which the coloring liquid is added in the coloring liquid adder 126 into a cylindrical shape. The core portion tow 121 that has passed through the converging tube 127 is fed toward the first winding machine 128 in a state of being formed into a cylindrical shape.

The first winding machine 128 is a device that winds the liquid impervious sheet 63 around the core tow 121 in a state of being formed into a cylindrical shape and having a colored liquid added thereto. In the first winding machine 128, a long liquid impervious sheet 63 having a predetermined width is wound around a bobbin 128a, and the long liquid impervious sheet 63 is drawn out from the bobbin 128a. Yes. In the first winding machine 128, the liquid impervious sheet 63 is wound around and adhered to the outer periphery of the core tow 121 while the core tow 121 is being transported by the transport belt 128b. In this way, a long filter material for forming the core portion 61 whose outer peripheral surface is wound by the liquid impervious sheet 63 is manufactured, and is drawn out toward the converging portion 130 on the downstream side.

The converging part 130 is configured to deploy the sheath part tow 111 around the core part tow 121 and includes a ring guide 131 and a double conical tube 132. One or a plurality of ring guides 131 may be provided. In the illustrated example, two ring guides 131 having different inner diameters are arranged. The sheath part tow 111 passes over the outer peripheral surface of the ring guide 131 and is sent to the double conical tube 132, and is gradually expanded into a cylindrical shape. The core tow 121 is fed to the double conical tube 132 through the inner peripheral side of the ring guide 131.

The double conical tube 132 is a double integral of two tapered conical tubes. The core tow 121 passes through the inner passage of the inner conical tube, and the outer passage of the outer conical tube is sheathed. The toe 111 for part passes. In the process in which the core tow 121 and the sheath tow 111 pass through the respective passages in the double conical tube 132, the sheath tow 111 is disposed so as to cover the outer peripheral side of the core tow 121. Then, in a state where the sheath portion tow 111 is disposed on the outer peripheral side of the core portion tow 121, these are supplied to the second winding machine 140.

A well-known one can be applied to the second winding machine 140. In the second winding machine 140, a long plug wrap 64 having a predetermined width is wound around a bobbin 140a, and the long plug wrap 64 is drawn out from the bobbin 140a. The core tow 121 and the sheath tow 111 supplied to the second winding machine 140 are transported while being compressed by the transport belt 140b. Then, the plug wrap 64 is supplied to the outer peripheral side of the sheath portion tow 111 being transported by the transport belt 140b, and the plug wrap 64 is wound around and adhered to the outer periphery of the sheath portion tow 111. In this manner, the core portion toe 121, the sheath portion tow 111, and the plug wrap 64 are integrated, and a long filter segment is manufactured. The sheath / core downstream filter segment 6 according to this embodiment can be manufactured by appropriately cutting the long filter segment.

The upstream filter segment 5 in the filter 4 can be manufactured by a known method. Then, the filter 4 is manufactured by arranging the upstream filter segment 5 and the downstream filter segment 6 in series and winding them together with a molding paper 7. Then, the cigarette 1 is manufactured by arranging the tobacco rod 2 and the filter 4 separately manufactured in series and winding them together by the chip paper 3.

In the filter 4 configured as described above, the downstream filter segment 6 with the suction side end face located on the suction end 4b side exposed to the outside is continuously provided downstream of the upstream filter segment 5. As shown in FIG. 4, the downstream filter segment 6 includes a core portion 61 in which a filter material is colored by adding a coloring liquid containing a dye, a sheath portion 62 that covers the outer periphery of the core portion 61, and a core And a liquid impermeable sheet 63 disposed at the boundary between the portion 61 and the sheath portion 62.

In the downstream filter segment 6 according to the present embodiment, a liquid impervious sheet 63 having an annular cross section is disposed at the boundary between the core 61 and the sheath 62, and the core 61 and the sheath 62 are partitioned. According to such a cross-sectional structure, the liquid impervious sheet 63 prevents the coloring liquid added to the core part tow 121 during the manufacture of the downstream filter segment 6 from oozing out to the sheath part tow 111 side. Is done. That is, the coloring liquid can be stably held (fastened) in the core portion 61 without the coloring liquid oozing from the core portion 61 of the downstream filter segment 6 to the sheath portion 62 side. Therefore, in the cross section of the downstream filter segment 6, the boundary between the colored portion (core portion 61) and the non-colored portion (sheath portion 62) is not ambiguous or the boundary is not blurred. The excellent filter 4 and the cigarette 1 equipped with the same can be provided.

By the way, since the weight per batch of filter tows often reaches several tons, when trying to manufacture a sheath-core type filter segment using a pre-colored filter tow, it has a core portion of the same color. Filter segments will be manufactured on the scale of several tons. The pre-colored filter tow here means that the filter tow has already been colored in a state where, for example, an amount of about 50 to 700 kg is stored in the storage container 122 in the form of a bale compressed and packed. To do. In this case, when trying to develop a large number of color variations in the core portion, it is difficult to produce filter segments of each color in a small lot, and the efficiency may deteriorate. In contrast, in the present embodiment, the coloring liquid is added to the core portion tow 121 that has not been previously colored in the manufacturing process of the downstream filter segment 6. Therefore, even when many color variations of the core part 61 are developed, it is possible to deal with small-lot production of filter segments, and it is possible to suppress the deterioration of efficiency.

In addition, as a dye contained in the coloring liquid added to the core portion 61, a food coloring allowed to be used as a food additive based on the Food Sanitation Law can be suitably applied. Examples of the liquid impervious sheet 63 having liquid impermeability include polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), cellophane, and the like. It is not limited. Moreover, the liquid impervious sheet 63 may be, for example, a single film formed from the above-described raw materials, or may be a form in which the film is attached to an appropriate base material such as paper.

In the present embodiment, as described above, the coloring liquid added to the core portion 61 includes a fragrance in addition to the dye. For example, the coloring liquid added to the core part 61 is a liquid in which a dye and a fragrance are dissolved in a solvent. By adding a fragrance to the coloring liquid added to the core portion 61 in advance, a fragrance process such as adding a fragrance to the filter tow or arranging a fragrance capsule enclosing the fragrance is provided in the manufacturing process of the filter 4. A fragrance | flavor can be added to the core part 61, without. Therefore, it is possible to provide the filter 4 that can add flavor to the mainstream smoke during smoking without increasing the number of steps for manufacturing the filter 4.

Note that gums such as gellan gum may be dissolved in the coloring liquid added to the core portion 61 as a viscosity modifier. The solvent contained in the coloring liquid is a single solvent selected from triethyl citrate (TEC), propylene glycol (PG), glycerin (G), medium chain fatty acid triglyceride (MCT), benzyl alcohol, ethanol, water, and the like. Examples thereof include a solvent or a mixed solvent obtained by mixing a plurality of types.

Moreover, the kind of the fragrance | flavor included in a coloring liquid is not specifically limited. For example, acetanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, peru balsam oil, beeswax absolute, benzaldehyde, benzoin resinoid, benzyl alcohol Benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob broth, β-carotene, carrot juice, L-carvone, β- Caryophyllene, Cassia bark oil, Cedarwood oil, Celery seed oil, Camomil oil, Cinnamaldehyde, Cinnamic acid, Cinnamyl alcohol, Cinnamyl cinnamate, Citronet La oil, DL-cintonelol, clary sage extract, cocoa, coffee, cognac oil, coriander oil, cuminaldehyde, dabana oil, δ-decalactone, γ-decalactone, decanoic acid, dill herb oil, 3,4-dimethyl-1, 2-cyclopentanedione, 4,5-dimethyl-3-hydroxy-2,6-dihydrofuran-2-one, 3,7-dimethyl-6-octenoic acid, 2,3-dimethylpyrazine, 2,5-dimethyl Pyrazine, 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl octanoate, oleic acid Ethyl, ethyl palmitate, ethyl phenylacetate, ethyl propionate, Ethyl thearate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3, (5 or 6) -dimethylpyrazine, 5-methyl-3-hydroxy-4-methyl-2 (5H) -furanone, 2 -Ethyl-3-methylpyrazine, eucalyptol, pheneglyk absolute, geneabsolute, gentian root infusion, geraniol, geranyl acetate, grape juice, guaiacol, guava extract, γ-heptalactone, γ-hexalactone, hexane Acid, cis-3-hexane-1-ol, hexyl acetate, hexyl alcohol, hexyl phenyl acetate, honey, 4-hydroxy-3-pentenoic acid lactone, 4-hydroxy-4- (3-hydroxy-1-butenyl)- 3,5,5-trimethyl-2-cycl Lohexane-1-one, 4- (para-hydroxyphenyl) -2-butanone, sodium 4-hydroxyundecanoate, immortel absolute, β-ionone, isoamyl acetate, isoamyl butyrate, isoamyl phenylacetate, isobutyl acetate, phenyl Isobutyl acetate, jasmine absolute, coconut tincture, rapdanum oil, lemon terpenes oil, licorice extract, linalool, linal acetate, ropage root oil, maltol, maple syrup, menthol (L-menthol), menthone, L-menthyl acetate, Paramethoxybenzaldehyde, methyl-2-pyrrolyl ketone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methyl Herbic acid, mimosa broth, honey, myristic acid, nerol, nerolidol, γ-nonalactone, nutmeg oil, δ-octalactone, octanal, octanoic acid, orange flower oil, orange oil, oris oil, palmitic acid, peppermint oil, pre Grain paraguay oil, phenethyl alcohol, phenethyl alcohol, phenyl acetate, piperonal, plum extract, propenyl guaetol, propyl acetate, 3-propylidenephthalide, prune juice, pyruvic acid, raisin extract, rose oil, rum , Sage oil, sandalwood oil, spearmint oil, stylax absolute, marigold oil, de distilate, α-terpineol, terpinyl acetate, 5,6,7,8-tetrahydroxaline, 1, 5,5,9-tetramethyl-13-oxachloro (8.3.0.0 (4.9)) tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tridecanone Trimethyl citrate, 4- (2,6,6-trimethyl-1,3-cyclohexenyl) 2-buten-4-one, 2,6,6-trimethyl-2-cyclohexene-1,4-dione, 4, -(2,6,6-trimethyl-1,3-cyclohexadienyl) 2-buten-4-one, 2,3,5-trimethylpyrazine, γ-undecalactone, γ-valerolactone, vanilla extract, vanillin , Peratoraldehyde, violet leaf absolute, and the like.

Further, the filter 4 in the present embodiment is a multi-color filter segment configured as a multi-segment filter including an upstream filter segment 5 and a downstream filter segment 6, and including a core portion 61 and a sheath portion 62 on the suction end 4b side. A certain downstream filter segment 6 is arranged, and an upstream filter segment 5 which is a normal cellulose acetate filter segment is arranged on the connection end 4a side. According to this, by arranging the multicolor filter segment in a partial section in the axial direction of the filter 4, it is possible to reduce the manufacturing cost of the filter as compared with the case where the multicolor filter segment is disposed in the entire section. .

Further, as shown in FIG. 3, in the present embodiment, a vent hole 31 formed in the chip paper 3 around which the filter 4 is wound is provided at a position upstream of the downstream filter segment 6. . Specifically, a vent hole 31 is provided in a portion of the chip paper 3 where the upstream filter segment 5 is wound. Here, the air introduced into the upstream filter segment 5 from the air vent 31 joins and is mixed with the mainstream smoke. Here, FIG. 6 is a diagram illustrating the flow of mainstream smoke flowing through the filter 4 according to the first embodiment. The white arrows in FIG. 6 indicate the flow of mainstream smoke flowing through the filter 4. 6 indicates the flow of air introduced from the vent hole 31 into the upstream filter segment 5. As shown in the explanatory diagram of FIG. 6, most of the mainstream smoke (open arrow) is centered on the filter 4 by being forced by the flow of air (broken arrow) introduced from the outer periphery of the upstream filter segment 5. Flowing part. As a result, the mainstream smoke that has passed through the upstream filter segment 5 is preferentially introduced into the core portion 61 of the downstream filter segment 6. Thereby, a flavor is provided to mainstream smoke by the fragrance | flavor added to the core part 61, and the flavoring of mainstream smoke can be promoted.

<Modification>
Next, the filter 4 according to the modification will be described. As shown in FIG. 7, the filter 4 is different from the above-described filter 4 in that the filter 4 is a so-called recess filter having a recess portion 8 provided on the suction end 4 b side. The filter 4 according to this modification has a downstream filter segment 6A. The downstream filter segment 6A according to the present modification is wound around the downstream filter segment 6A so that the web for winding the filter tow of the sheath portion 62 extends (projects) rearward from the rear end surface of the downstream filter segment 6A. It is disguised. In the example of FIG. 7, the downstream end of the downstream filter segment 6A is the rear end side of the forming paper 7 that integrally winds the upstream filter segment 5 and the downstream filter segment 6A, and the tip paper 3 that winds the filter 4 and the tobacco rod 2 together. By extending (projecting) rearward from the rear end surface, a recessed recess portion 8 is formed on the suction end 4b side. In the example shown in FIG. 7, the position of the rear end edge of the plug wrap 64 that winds up the outer periphery of the sheath portion 62 in the downstream filter segment 6A coincides with the position of the rear end surface of the downstream filter segment 6A. The plug wrap 64 may also be extended (projected) rearward from the rear end face of the downstream filter segment 6 </ b> A, similarly to the molding paper 7.

The filter 4 according to the present modification includes the recess portion 8 as described above, so that the rear end surface of the downstream filter segment 6A is recessed with respect to the rear ends of the chip paper 3 and the molding paper 7. Therefore, the smoker's tongue is unlikely to contact the rear end surface of the downstream filter segment 6A. Thereby, at the time of smoking, it can suppress that the dye and the fragrance | flavor in the core part 61 of 6 A of downstream filter segments elute in a smoker's saliva.

In addition, the filter 4 can employ various modified examples. For example, in the filter 4 described above, the example in which the downstream filter segment 6 is configured with the core portion 61 and the sheath portion 62 as a double coaxial structure has been described, but the present invention is not limited thereto. A plurality of core parts 61 may be arranged in the cross section of the downstream filter segment 6. 8A to 8D are views showing modifications of the cross-sectional structure of the downstream filter segment 6. FIG. 8A shows an example in which the core portion 61 is eccentrically arranged with respect to the central axis CL of the downstream filter segment 6. FIG. 8B shows an example in which a plurality of core portions 61 are arranged in the downstream filter segment 6. In this case, each core part 61 may be colored in a different color, or all the core parts 61 may be colored in the same color. Also, when a plurality of core parts 61 are arranged as shown in FIG. 8B The kind of the fragrance may be changed for each core part 61. As described above, various variations can be employed for the coloring and scenting of the core portion 61. 8C and 8D show examples in which the core portion 61 has a shape other than a round shape. In the example shown in FIGS. 8C and 8D, an example in which the core portion 61 is a quadrangle and a triangle is shown, but a heart shape, a star shape, and other various shapes can be employed. The core portion 61 may have a shape such as a motif such as an animal or a brand logo. Further, when a plurality of core parts 61 are arranged in the downstream filter segment 6, the core parts 61 having different shapes may be arranged.

The preferred embodiment of the present invention has been described above, but it is obvious to those skilled in the art that the smoking article according to the present invention and the filter used therefor can be variously changed, improved, combined, and the like. For example, in the present embodiment, the filter 4 is configured as a multi-segment filter, but the downstream filter segment 6 may be disposed over the entire section of the filter 4 in the long axis direction. Further, in the present embodiment, the liquid impervious sheet is disposed at the boundary between the core part 61 and the sheath part 62 of the downstream filter segment 6, but if a barrier layer having liquid impermeability is disposed. Good. For example, a coating having liquid impermeability may be applied between the core portion 61 and the sheath portion 62.

DESCRIPTION OF SYMBOLS 1 ... Cigarette 2 ... Cigarette rod 3 ... Chip paper 4 ... Filter 5 ... Upstream filter segment 6 ... Downstream filter segment 61 ... Core part 62 ... Sheath part 63 ... Liquid impervious sheet

Claims

A filter for smoking articles,
The filter segment is arranged so that the rear end face is exposed to the mouth end side,
The cross-sectional structure of the filter segment is
A core portion in which the filter material is colored by adding a coloring liquid containing a dye;
A sheath part having a filter material formed so as to cover the outer periphery of the core part;
A barrier layer disposed at a boundary portion between the core portion and the sheath portion and having liquid impermeability;
Having
Filter for smoking articles.
The filter for smoking articles according to claim 1, wherein the barrier layer is a sheet member having liquid impermeability.
The filter for smoking articles according to claim 1 or 2, wherein the coloring liquid added to the core part contains a fragrance.
The filter further includes an upstream filter segment disposed on the upstream side of the filter segment disposed so that the rear end surface is exposed to the mouth end side.
The filter for smoking articles as described in any one of Claim 1 to 3.
The coloring liquid added to the core part contains a fragrance,
A vent hole for introducing air into the filter is formed in the chip paper around which the filter is wound,
The vent is provided at a position on the upstream side of the filter segment arranged so that the rear end surface is exposed to the mouth end side,
The filter for smoking articles of Claim 4.
The filter for a smoking article according to claim 5, wherein the vent hole is provided in a portion of the chip paper where the upstream filter segment is wound.
The filter segment arranged so that the rear end surface is exposed to the mouth end side has a winding paper for winding the filter material of the sheath part,
A recess is formed at the mouth end of the filter by being wound around the filter segment so that the web extends backward from the rear end surface,
The filter for smoking articles as described in any one of Claim 1 to 6.
A smoking article comprising a filter,
The filter is
The filter segment is arranged so that the rear end face is exposed to the mouth end side,
The cross-sectional structure of the filter segment is
A core portion in which the filter material is colored by adding a coloring liquid containing a dye;
A sheath part having a filter material formed so as to cover the outer periphery of the core part;
A barrier layer disposed at a boundary portion between the core portion and the sheath portion and having liquid impermeability;
Having
Smoking articles.