JP7577754B2 - Particle-containing filter sheet for flavor inhalation articles and method for producing same - Google Patents

Description

The present invention relates to a particle-containing sheet for a flavor inhalation article filter and a method for producing the same.

A technology is known in which activated carbon is incorporated into a smoking article filter to selectively remove volatile components in tobacco smoke and make the taste and aroma milder. For example, Patent Document 1 discloses a filtering material for smoking article filters, which is obtained by mixing powdered activated carbon with wood pulp fibers disintegrated in the air, dispersing and collecting the fibers in the air to form a web, and then spraying an adhesive onto the web and drying it. In addition, a technology is known in which adsorbents other than activated carbon or particles carrying a flavoring are placed in the filter.

Japanese Unexamined Patent Publication No. 48-85874

In order to improve production efficiency, the sheets for flavor inhalation article filters are usually manufactured at high speeds, and the sheets are also handled at high speeds when processed into flavor inhalation article filters, so the sheets are required to have high tensile strength. However, adding functional particles such as activated carbon to the sheet reduces the tensile strength of the sheet. In view of these circumstances, the present invention has an objective of providing a particle-containing sheet for flavor inhalation article filters that has high strength.

The inventors have found that the above-mentioned problems can be solved by using a sheet in which particles are unevenly distributed in the thickness direction. That is, the above-mentioned problems are solved by the following present invention.
(1) A sheet for a flavor inhalation article filter comprising fibers, particles having a particle size of 20 to 200 mesh, and an adhesive,
The weight of the particles present in the region from the center in the thickness direction to one surface/the weight of all particles is defined as the distribution ratio CA,
When the weight of the particles present in the region from the center in the thickness direction to the other surface/the weight of all particles is defined as a distribution ratio CB,
CA>CB.
A filter sheet for flavor inhalation products.
(2) The sheet according to (1), wherein the weight of the particles contained per unit area of the sheet is 7 to 80 g/ ^m2 .
(3) The sheet according to (1) or (2), wherein the CA is 60 to 100 and the CB is 0 to 40.
(4) The weight of the particles present in a 5% area from one surface in the thickness direction/the weight of all particles is defined as a distribution ratio CAs.
When the weight of the particles present in a 5% area from the other surface in the thickness direction/the weight of all particles is defined as a distribution ratio CBs,
The sheet according to any one of (1) to (3), wherein CAs is 0 to 10 and CBs is 0 to 5.
(5) The particles are
The sheet according to any one of (1) to (4), comprising an adsorbent or a component-releasing agent.
(6) The sheet according to any one of (1) to (5), wherein the fibers are wood pulp fibers.
(7) The sheet according to (6), wherein the weight of the wood pulp fibers contained per unit area of the sheet is 25 to 50 g/ ^m2 .
(8) The sheet according to any one of (1) to (7), wherein the adhesive is polyvinyl alcohol, a vinyl acetate acrylic copolymer, or a mixture thereof.
(9) A sheet according to any one of (1) to (8), wherein the weight of the adhesive contained per unit area of the sheet is 4 to 40 g/ ^m2 .
(10) The following steps:
Step 1: A sheet is formed by placing fibers on a mesh that is sucked from the back side. Step 2: An adhesive is added to one side A of the sheet. Step 3: The sheet obtained in step 2 is turned over. Step 4: The particles and adhesive are added simultaneously to the other side B of the sheet, or the particles are added and then the adhesive is added.
The method for manufacturing a sheet according to any one of (1) to (9), comprising:
(11) The manufacturing method described in (10), wherein step 1 includes blowing the fibers onto the mesh using a gas medium.
(12) The manufacturing method according to (10) or (11), further comprising a step of drying surface A of the sheet between steps 2 and 3.
(13) A flavor inhalation article filter comprising the sheet according to any one of (1) to (9).

The present invention provides a sheet for particle-containing flavor inhalation article filters having high strength.

Cross-sectional view of a sheet for a flavor inhalation article filter 1 is a diagram showing a method for manufacturing a sheet for a flavor inhalation article filter. Conceptual diagram of a flavor inhalation product filter FIG. 1 is a diagram showing an embodiment of a combustion type tobacco flavor inhalation article. FIG. 1 is a diagram showing an embodiment of a non-combustion type tobacco flavor inhalation article.

The present invention will be described in detail below. In the present invention, "X to Y" includes the extreme values X and Y.
In the present invention, the term "flavor inhalation article" refers to an article that allows a user to inhale flavor. Among flavor inhalation articles, those that contain tobacco or components derived from tobacco are called "tobacco flavor inhalation articles". Tobacco flavor inhalation articles are broadly classified into "combustion type tobacco flavor inhalation articles" (also simply called "smoking articles") that generate flavor by combustion, and "non-combustion type tobacco flavor inhalation articles" that generate flavor without combustion. Furthermore, non-combustion type tobacco flavor inhalation articles are broadly classified into "non-combustion heating type tobacco flavor inhalation articles" that generate flavor by heating, and "non-combustion non-heating type tobacco flavor inhalation articles" that generate flavor without heating.

1. Flavor Inhalation Article Filter Sheet The flavor inhalation article filter sheet contains fibers, particles having a particle size of 20 to 200 mesh, and an adhesive, and the particles are unevenly distributed in the thickness direction.
(1) Particles The particles contained in the sheet for flavor inhalation filters have a particle size of 20 to 200 mesh. If the particle size is too small, handling becomes difficult. If the particle size is too large, the particles are unlikely to remain inside the sheet, and many of the particles will be present on the sheet surface. As a result, when the sheet is used to manufacture a filter, the particles present on the sheet surface may come into contact with the surface of the device at high speed, damaging the surface of the device, or the particles may fall off the sheet, resulting in a decrease in the mechanical properties of the sheet. From this perspective, the lower limit of the numerical range is preferably 28 mesh or more, more preferably 70 mesh or more. The upper limit of the numerical range is preferably 150 mesh or less. Particles of 28 mesh or more are preferred because they are easily embedded inside the sheet for smoking article filters.

The particles are not limited as long as they are used in the field of flavor inhalation articles, but are preferably adsorbents or component release agents. The adsorbent is a material that adsorbs a part of the components to be inhaled that are generated from the flavor inhalation article, and examples of such materials include porous materials such as activated carbon and zeolite, and polar group-containing materials such as cellulose. The component release agent is a material that includes a certain substance and a carrier that supports the substance so that it can be released, or a material that itself releases the substance. In the former case, the substance is a flavor such as menthol, and the carrier is an inclusion compound such as cyclodextrin, or a porous material such as calcium carbonate or alumina. Examples of the latter include mint leaf particles obtained by crushing mint leaves and tobacco particles obtained by crushing tobacco plants. The mint leaf particles release menthol, and the tobacco particles release flavor. The entire particle may be composed of the adsorbent or component release agent, or a part of the entire particle may be composed of the adsorbent or component release agent. In the latter case, the lower limit of the total amount of the adsorbent and the component release agent in the whole particle is preferably 80% by weight or more, more preferably 90% by weight or more, and even more preferably 95% by weight or more, and the upper limit is preferably 99% by weight or less, more preferably 98% by weight or less.

(2) Fibers The fibers are not limited as long as they can form the matrix of the sheet for the flavor inhalation article filter. For example, synthetic fibers or semi-synthetic fibers made from cellulose acetate, PP, PE, PET, polylactic acid, etc. can be mentioned. In addition, natural fibers such as plant fibers made from cellulose, etc. can be mentioned, but natural fibers are preferable from the viewpoint of reducing the environmental load. The length of the fibers is not particularly limited, but relatively short fibers are preferable for forming the matrix of the sheet, and the fiber length is preferably 5 mm or less. The fineness of the fibers is not particularly limited, but the single fineness of synthetic or semi-synthetic fibers is preferably 1 to 30 (denier/filament), more preferably 1 to 10 (denier/filament). In the case of natural fibers, the roughness can be used as an index representing the thickness and length. From the viewpoint of more easily achieving an airflow resistance suitable for inhalation, the roughness is preferably 0.15 to 0.25 mg/m, more preferably 0.16 to 0.24 mg/m, and even more preferably 0.18 to 0.22 mg/m. The roughness is measured in accordance with JIS P 8120:1998.

When synthetic or semi-synthetic fibers are used, the cross-sectional shape of the fibers is not limited, but an R-shape or a Y-shape is preferable, and a Y-shape is more preferable from the viewpoint of cost. In addition, plasticizers and binders can be used to bond the contact points between fibers during sheet molding to improve sheet strength. When natural fibers such as cellulose are used, water-soluble binders such as starch, modified starch, modified cellulose, PVA, or PVAc can be used alone or in combination, or latex can be used. When acetate fibers are used as fibers, binders for the above-mentioned natural fibers can be used, and plasticizers (triacetin) that have the ability to dissolve cellulose acetate can also be used.

Among them, natural fibers are preferred because they have a smaller environmental impact than synthetic or semi-synthetic fibers, and wood pulp fibers are particularly preferred because they have excellent heat resistance. In this case, the weight of wood pulp fibers contained per unit area of the sheet is preferably 25 to 50 g/ ^m2 from the viewpoints of manufacturability when processing the sheet into a filter and rod hardness after filter processing.

(3) Adhesive Any known adhesive can be used. Among them, from the viewpoint of relatively little effect on the flavor of the flavor inhalation article and excellent heat resistance, the adhesive is preferably selected from polyvinyl alcohol, vinyl acetate acrylic copolymer, or a mixture thereof. The weight (solid weight) of the adhesive is preferably 4 to 40 g/ ^m2 per unit area of the sheet. If the amount of adhesive is too large, it is economically disadvantageous and there is a concern about the effect on the flavor. Furthermore, if the amount is too small, there are few adhesion points between the fibers, which may cause problems such as fibers coming apart and the sheet tensile strength not being maintained.

(4) Particle Distribution Ratio The particles are distributed in the sheet for flavor inhalation article filters with the following distribution ratios. The distribution ratios will be explained with reference to FIG. 1. FIG. 1 shows a cross section of the sheet for flavor inhalation article filters. In the figure, 1 is the sheet for flavor inhalation article filters, 13 is particles, 15 is fibers, A is one surface, a is the region from the center in the thickness direction to one surface, B is the other surface, and b is the region from the center in the thickness direction to the other surface. The distribution ratios CA and CB are defined as follows:
CA=weight of particles present in region a/total weight of particles CB=weight of particles present in region b/total weight of particles The particles are distributed in the sheet so as to satisfy CA>CB. CA:CB is preferably 60-100:0-40, more preferably 70-90:10-30.

The total weight of the particles per unit area of the sheet for flavor inhalation article filters is preferably 7 to 80 g/m ² , more preferably 10 to 40 g/m ^2. If the weight of the particles is less than the lower limit, the function of the particles cannot be fully exerted, and if it exceeds the upper limit, it is economically disadvantageous.

The particle distribution rate in the vicinity of the surface layer of the sheet for flavor inhalation article filters is preferably low. This is because if many particles are present in the vicinity of the surface layer of the sheet for flavor inhalation article filters, there is a risk of damaging the manufacturing equipment during production. From this viewpoint, the particle distribution rate CAs in the vicinity of the surface layer, defined as follows, is preferably 0 to 10, more preferably 0 to 5, and even more preferably 0 to 3, and the distribution rate CBs is preferably 0 to 5, more preferably 0 to 3, and even more preferably 0 to 1. From the viewpoint of protecting the manufacturing equipment, it is more preferable that CAs and CBs are both 0, and when CAs and CBs are not both 0, it is preferable that the particles are embedded in the sheet for flavor inhalation article filters.
CAs = weight of particles present in a 5% area in the thickness direction from one surface (surface A) / total particle weight CBs = weight of particles present in a 5% area in the thickness direction from the other surface (surface B) / total particle weight

These distribution rates can be determined by image analysis of the cross section of the sheet for filters in flavor inhalation articles, or by dividing the sheet for filters in flavor inhalation articles at a plane parallel to the main surface at a portion 5% from the center or surface in the thickness direction and measuring the weight of the particles and the sheet. From the viewpoint of simplicity, the former method is preferred. Since the distribution rate in the sheet for filters in flavor inhalation articles is uniform in the surface direction, in this method, the distribution rate of the entire sheet can be determined by image analysis of one cross section of the sheet for filters in flavor inhalation articles.

(5) Shape of the sheet for flavor suction article filter The shape is appropriately prepared according to the application. For example, in the case of a cylindrical flavor suction article filter having a diameter of 24 mm and a height of 27 mm, the shape of the sheet for flavor suction article filter is about 27 mm long, 50 to 150 mm wide, and 0.8 to 2.0 mm thick. The thickness can be measured by performing optical measurements such as image analysis on the cross section of the sheet. It can also be measured using the thickness measurement method for paper and paperboard shown in JIS P8118:2014. The apparent density of the sheet for flavor suction article filter is not limited, but in one embodiment, it is 30 to 200 g / m ^3. The apparent density referred to here can be calculated by dividing the basis weight of the sheet including all of the sheet components, namely, fibers, adhesives, and particles, by the volume of the sheet.

2. Manufacturing Method The sheet for a flavor inhalation article filter may be manufactured by any method, but is preferably manufactured by a method including the following steps.
Step 1: Fibers are placed on a mesh that is being sucked from the back side to form a sheet. Step 2: Adhesive is added to one side A of the sheet. Step 3: The sheet obtained in step 2 is turned over. Step 4: The particles and adhesive are added simultaneously to the other side B of the sheet, or the particles are added and then the adhesive is added.

Figure 2 shows one embodiment of the manufacturing method. In the figure, 3 is a mesh, 5 and 7 are sheet conveyors, 10 is a particle-free sheet, 1 is a sheet for flavor suction article filters, 31 is a fiber feeder, 33 is an adhesive feeder, 37 is an aspirator, 55 is a dryer, 71 is a particle feeder, 73 is an adhesive feeder, and 75 is a dryer. For ease of understanding, multiple sheets 10 are shown, but the sheet 10 on the mesh 3 may be continuous with the sheet 1.

(1) Step 1
In this process, the fibers are placed on a mesh that is sucked from the back side to form the sheet 10. The mesh is not limited as long as it is one that is used in the manufacture of nonwoven fabrics, and examples thereof include wire mesh. The mesh is sucked from the back side, so that the placed fibers are fixed. This process is preferably carried out by blowing the fibers onto the mesh using a gas medium. Air can be used as the gas.

(2) Step 2
In this step, adhesive is added to one side A of the sheet 10. The adhesive is as described above, and the amount is adjusted appropriately, but taking into account the amount of adhesive added to the other side B, the amount finally contained per unit area of the sheet is adjusted to about 4 to 40 g/ ^m2 in terms of the weight of the adhesive solids. For example, about 2 to 20 g/ ^m2 of adhesive can be added to side A, and about 2 to 20 g/ ^m2 of adhesive can be added to side B in step 4. The adhesive supplying machine 33 is preferably a spray, and the adhesive is preferably sprayed. The sheet 10 to which the adhesive has been added is transferred to the sheet conveying machine 5, and is preferably dried. Drying may be performed using a dryer 55 or by air drying. For example, a belt conveyer can be used as the sheet conveying machine. In this step, the adhesive is applied to side A, and the fibers are fixed to each other.

(3) Step 3
In this step, the sheet 10 obtained in step 2 is inverted. Specifically, the sheet 10 is transferred from the sheet conveyor 5 to the sheet conveyor 7, and is inverted so that the side B faces upward on the paper.

(4) Step 4
In this step, the particles and adhesive are added simultaneously to the other surface B of the sheet 10, or the particles are added and then the adhesive is added. FIG. 2 shows an embodiment in which particles are supplied from a particle supplying machine 71 to surface B of the sheet 10, and then adhesive is sprayed from an adhesive supplying machine 73. The adhesive and particles may be supplied simultaneously. As described above, the adhesive supplying machine 73 is preferably a spray. The amount of adhesive added in this step is adjusted so that the final weight of the adhesive solid content is about 4 to 40 g/ ^m2, as described above. The amount of particles is appropriately adjusted so as to achieve the desired amount. In the smoking article filter sheet 1 manufactured in this manner, a large number of particles are present on surface A.

(5) Drying Step In this manufacturing method, a drying step can be provided at any position. Fig. 2 shows an embodiment in which a drying step for drying the sheet is provided between steps 2 and 3 and after step 4. This embodiment is suitable when a water-soluble adhesive is used. Drying may be performed by air drying. When latex is used as the adhesive, air drying may be performed without providing a drying step using a dryer, or no drying step may be provided.

3. Flavor Inhalation Article A flavor inhalation article filter is prepared from the flavor inhalation article filter sheet. The preparation method is not limited and can be carried out by a known method. For example, a cut flavor inhalation article filter sheet is rolled to form a cylindrical shape, or a plurality of cut flavor inhalation article filter sheets 1 are stacked and folded so that the sheet cross section forms an S-shape, and then filled in a wrapper to form a cylindrical shape, to form a filter segment 100, as shown in FIG. 3. The method of FIG. 3 can be carried out, for example, as described in JP-B-44-3727. The filter segment can be combined with other segments such as a flavor generating segment to form a combustion type tobacco flavor inhalation article, or a non-combustion type tobacco flavor inhalation article, particularly a non-combustion heating type tobacco flavor inhalation article.

(1) Combustion-type tobacco flavor inhalation article An example of a combustion-type tobacco flavor inhalation article is shown in FIG. 4. As shown in FIG. 4, the combustion-type tobacco flavor inhalation article 240 includes a tobacco rod portion 250, and a second filter segment F2 and a first filter segment F1 (collectively referred to as a "filter portion") provided adjacent thereto. FIG. 4 shows an embodiment in which the second filter segment F2 is composed of the filter segment 100 of the present invention, but the first filter segment F1 may be composed of the filter segment 100 of the present invention. The tobacco rod portion 250 includes tobacco shreds 260 (shredded leaves, tobacco) and a cigarette paper 270 wrapped around the shredded leaves. The tobacco rod portion 250, the first filter segment F1, and the second filter segment F2 are connected by a tipping paper member 280. The tipping paper member 280 may have a vent hole in a part of its outer periphery. The number of vent holes may be one or more, for example, 10 to 40 vent holes may be formed. In the case where there are a plurality of vent holes, the vent holes can be arranged, for example, in a line in a ring shape on the outer periphery of the tipping paper member 280. The plurality of vent holes can be arranged at substantially regular intervals. By providing the vent holes, air is taken into the filter portion through the vent holes during inhalation. The mainstream smoke is diluted by the outside air through the vent holes, so that a product with a desired tar value can be designed. When F2 is the filter segment of the present invention, F1 may be a normal acetate filter in which a cellulose acetate long fiber bundle is added with triacetin, a plasticizer, and then wrapped in a filter wrapper in a cylindrical shape, a nonwoven fabric filter in which a nonwoven fabric sheet containing fibers and an adhesive is wrapped in a filter wrapper in a cylindrical shape from which particulate matter has been removed from the filter of the present invention, or a paper filter in which paper is creped and gathered and then wrapped in a filter wrapper in a cylindrical shape.

In a combustion type tobacco flavor inhalation article, the F2 segment length can be about 10 to 15 mm. In that case, about 20 to 100 mg of granular material can be filled in the F2 segment. When activated carbon is used as the granular material, it is desirable to fill the F2 segment with about 20 to 50 mg from the viewpoint of flavor quality when the combustion type tobacco flavor inhalation article is used, and it is desirable to fill the F2 segment with about 50 to 100 mg from the viewpoint of removing volatile components in mainstream smoke.

A user can enjoy the flavor of tobacco by lighting the tip of the tobacco rod portion 250 and holding the mouth end of the first filter segment F1 in the mouth and inhaling. By appropriately selecting the particles 13 in the filter segment 100, various functions can be imparted to the combustion-type tobacco flavor inhalation article 240.

(2) Non-combustion heating type tobacco flavor inhalation article An example of a non-combustion heating type tobacco flavor inhalation article is shown in FIG. 5. In the figure, 300 is a non-combustion heating type tobacco flavor inhalation article, which includes a tobacco rod part 310 and a mouthpiece segment 320. The mouthpiece segment 320 includes a cooling segment 330, a center hole segment 340, a first filter segment F1, and a second filter segment F2. The first filter segment F1 and the second filter segment F2 are collectively referred to as a "filter part". FIG. 5 shows an embodiment in which the second filter segment F2 is composed of the filter segment 100 of the present invention. However, the first filter segment F1 may be composed of the filter segment 100 of the present invention, and in this case, the second filter segment F2 can be omitted. During inhalation, the tobacco rod part 310 is heated, and inhalation is performed from the end of the first filter segment F1.

The tobacco lot section 310 has a tobacco filler 350 containing tobacco and an aerosol generating base material, and a cylindrical wrapper 360 that covers the tobacco filler 350. The tobacco filler 350 may further contain a volatile flavor component and water. The size of the tobacco used as the filler and its preparation method are not limited. For example, dried tobacco leaves chopped to a width of 0.8 to 1.2 mm may be used. When chopped to the above width, the length of the chopping is approximately 5 to 20 mm. In addition, dried tobacco leaves may be crushed to an average particle size of approximately 20 to 200 μm, homogenized, processed into a sheet, and chopped to a width of 0.8 to 1.2 mm. When chopped to the above width, the length of the chopping is approximately 5 to 20 mm. Furthermore, the above-mentioned sheet processed product may be gathered without being chopped and used as the filler. In addition, multiple sheets molded into a cylindrical shape may be arranged in a concentric circle. Whether dried tobacco leaves are shredded and used, or crushed and used as a homogenized sheet, various types of tobacco can be used for the tobacco filler. Flue, Burley, Orient, native, and other Nicotiana tabacum and Nicotiana rustica varieties can be appropriately blended to achieve the desired flavor. Details of the tobacco varieties are disclosed in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."

There are several known methods for grinding tobacco and processing it into homogenized sheets. One is a paper-making sheet made using a papermaking process; the other is a cast sheet made by mixing an appropriate solvent such as water to homogenize the material, then casting the homogenized material thinly onto a metal plate or metal plate belt and drying it; and the third is a rolled sheet made by extruding a homogenized material mixed with an appropriate solvent such as water into a sheet. Details of the types of homogenized sheets are disclosed in the "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."

The filling density of the tobacco filler 350 is not particularly limited, but from the viewpoint of ensuring the performance of the non-combustion heating type tobacco flavor inhalation article 300 and imparting a good flavor, it is usually 250 mg/cm3 or ^more , preferably 320 mg/cm3 or ^more , and usually 520 mg/cm3 ^or less, preferably 420 mg/ ^cm3 or less. Specifically, in the case of a tobacco lot portion 310 having a circumference of 22 mm and a length of 20 mm, the content of the tobacco filler 350 can be in the range of 200 to 450 mg per tobacco lot portion 310, and preferably 280 to 400 mg.

The aerosol-generating substrate is a material capable of generating an aerosol by heating, and includes, but is not limited to, glycerin, propylene glycol (PG), triethyl citrate (TEC), triacetin, 1,3-butanediol, etc. These may be used alone or in combination of two or more.

The type of volatile fragrance component is not particularly limited, and from the viewpoint of imparting a good flavor, 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 absolute, Lute, β-carotene, carrot juice, L-carvone, β-caryophyllene, cassia bark oil, cedarwood oil, celery seed oil, chamomile oil, cinnamaldehyde, cinnamic acid, cinnamyl alcohol, cinnamyl cinnamate, citronella oil, DL-citronellol, clary sage extract, cocoa, coffee, konjac oil, coriander oil, cuminaldehyde, davana oil, δ-decalactone, γ-decalactone, decanoic acid, dill herb oil, 3,4-dimethyl-1,2-cyclopentanedione, 4,5-dimethyl-3-hydroxy-2,5-dihydrofuran -2-one, 3,7-dimethyl-6-octenoic acid, 2,3-dimethylpyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl octanoate, ethyl oleate, ethyl palmitate, ethyl phenylacetate, ethyl propionate, ethyl stearate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3,(5 or 6)-dimethylpyrazine, 5-ethyl-3-hydroxybutyrate, Hydroxy-4-methyl-2(5H)-furanone, 2-ethyl-3-methylpyrazine, eucalyptol, fenugreek absolute, gene absolute, gentian root infusion, geraniol, geranyl acetate, grape juice, guaiacol, guava extract, gamma-heptalactone, gamma-hexalactone, hexanoic acid, cis-3-hexen-1-ol, hexyl acetate, hexyl alcohol, phenylhexyl acetate, honey, 4-hydroxy-3-pentenoic acid lactone, 4-hydroxy-4-(3-hydroxy-1-butenyl)-3,5,5-trimethyl 1-2-cyclohexen-1-one, 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, immortelle absolute, β-ionone, isoamyl acetate, isoamyl butyrate, isoamyl phenylacetate, isobutyl acetate, isobutyl phenylacetate, jasmine absolute, cola nut tincture, labdanum oil, lemon terpeneless oil, licorice extract, linalool, linalyl acetate, lovage root oil, maltol, maple syrup, menthol, menthone, L-menthyl acetate, paramethoxybenzaldehyde, Methyl 2-pyrrolyl ketone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methylvaleric acid, mimosa absolute, honeysuckle, myristic acid, nerol, nerolidol, gamma-nonalactone, nutmeg oil, delta-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, omega-pentadecalactone, peppermint oil, petitgrain Paraguay oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract STRUCTOSE, PROPENYLGUAETHOL, PROPYL ACETATE, 3-PROPYLIDENEPHTHALIDE, PRUNE JUICE, PYRUVIC ACID, RAISIN EXTRACT, ROSE OIL, RUM, SAGE OIL, SANDALWOOD OIL, SPEARMINT OIL, STYRAX ABSOLUTE, MARGIOUS GOLD OIL, TEA DISTRICT, α-TERPINEOL, TERPINYL ACETATE, 5,6,7,8-TETRAHYDROQUINOXALINE, 1,5,5,9-TETRAMETHYL-13-OXACYCLOHEXACYCLO(8.3.0.0(4.9))TRIDECANE, 2,3,5,6-TETRAMETHYLPYRAZINE, THYME OIL, TOMATO EXTRACT, 2-TRIDECANONE, CHLORIDE Examples of the volatile flavor components include triethyl enoate, 4-(2,6,6-trimethyl-1-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, veratraldehyde, violet leaf absolute, and extracts of tobacco plants (tobacco leaves, tobacco stems, tobacco flowers, tobacco roots, and tobacco seeds), with menthol being particularly preferred. These volatile flavor components may be used alone or in combination of two or more.

The content of the aerosol-generating base material in the tobacco filling 350 is not particularly limited, and is usually 5 to 50% by weight, preferably 10 to 20% by weight, from the viewpoint of generating sufficient aerosol and imparting a good flavor. When the tobacco filling 350 contains a volatile flavor component, the content of the volatile flavor component in the tobacco filling is not particularly limited, and is usually 100 ppm or more, preferably 10,000 ppm or more, more preferably 25,000 ppm or more, relative to the weight of the tobacco filling, from the viewpoint of imparting a good flavor, and is usually 100,000 ppm or less, preferably 50,000 ppm or less, more preferably 33,000 ppm or less.

The method of filling the tobacco filler 350 into the wrapper 360 is not particularly limited, but for example, the tobacco filler 350 may be wrapped in the wrapper 360, or the tobacco filler 350 may be filled into a cylindrical wrapper 360. When the tobacco has a longitudinal direction, such as a rectangular shape, the tobacco may be filled so that the longitudinal direction is in an unspecified direction within the wrapper 360, or may be aligned so that the longitudinal direction is in the axial direction of the tobacco lot portion 310 or perpendicular to the axial direction. When the tobacco lot portion 310 is heated, the tobacco components, aerosol-generating substrate, and water contained in the tobacco filler 350 vaporize, and are transferred to the mouthpiece segment 320 by inhalation.

The cooling segment 330 is composed of a cylindrical member 370. The cylindrical member 370 can be, for example, a paper tube made by processing cardboard into a cylindrical shape. The cylindrical member 370 and the mouthpiece lining paper 420 described later are provided with perforations 380 that penetrate both. Due to the presence of the perforations 380, outside air is introduced into the cooling segment 330 during inhalation. As a result, the aerosol vaporized components generated by heating the tobacco rod portion 310 come into contact with the outside air, and as their temperature drops, they are liquefied to form an aerosol. The diameter (distance across) of the perforations 380 is not particularly limited, but can be, for example, 0.5 to 1.5 mm. The number of perforations 380 is not particularly limited, and may be one or more than two. For example, a plurality of perforations 380 may be provided on the circumference of the cooling segment 330.

The center hole segment 340 is composed of a filling layer 390 having a hollow portion and an inner plug wrapper 400 that covers the filling layer 390. The center hole segment 340 has the function of increasing the strength of the mouthpiece segment 320. The filling layer 390 can be, for example, a rod with an inner diameter of φ5.0 to φ1.0 mm, in which cellulose acetate fibers are densely packed and a plasticizer containing triacetin is added at 6 to 20% by weight relative to the weight of the cellulose acetate and hardened. Since the filling layer 390 has a high fiber packing density, air and aerosol flow only through the hollow portion during inhalation and hardly flow inside the filling layer 390. When it is desired to reduce the loss of aerosol components due to filtration in the filter section, shortening the length of the filter section and replacing it with the center hole segment 340 is effective in increasing the delivery amount of the aerosol components. Since the filling layer 390 inside the center hole segment 340 is a fiber packed layer, it feels good to the touch from the outside during use.

The center hole segment 340 and the filter section are connected by an outer plug wrapper 410. The outer plug wrapper 410 can be, for example, a cylindrical piece of paper. The tobacco rod section 310, the cooling segment 330, and the connected center hole segment 340 and filter section are connected by a mouthpiece lining paper 420. These connections can be made, for example, by applying a vinyl acetate-based glue or other adhesive to the inner surface of the mouthpiece lining paper 420, and then inserting and rolling the three segments.

The axial length of the non-combustion heating type tobacco flavor inhalation article, i.e., the horizontal length in FIG. 5, is not particularly limited, but is preferably 40 to 90 mm, more preferably 50 to 75 mm, and even more preferably 50 to 60 mm. The circumferential length of the non-combustion heating type tobacco flavor inhalation article is preferably 16 to 25 mm, more preferably 20 to 24 mm, and even more preferably 21 to 23 mm. For example, the length of the tobacco lot portion 310 is 20 mm, the length of the cooling segment 330 is 20 mm, the length of the center hole segment 340 is 6 mm, and the lengths of the first filter segment F1 and the second filter segment F2 are each 7.0 mm. These individual segment lengths can be changed as appropriate depending on manufacturing suitability, required quality, and the like. In that case, the weight of the granular material contained in the second filter segment F2 can be 15 to 50 mg. Furthermore, only the filter portion may be disposed downstream of the cooling segment 330 without using the center hole segment 340. By appropriately selecting the particles 13 in the filter segment 100, various functions can be imparted to the combustion type tobacco flavor inhalation article 240.

(3) Non-combustion heating type tobacco flavor inhalation system The non-combustion heating type tobacco flavor inhalation article is preferably used in combination with a device for heating the article. This combination is also called a non-combustion heating type tobacco flavor inhalation system. A known device can be used, and it is preferable to use, for example, a heater using electric resistance.

1 Smoking article filter sheet 10 Particle-free sheet 13 Particles 15 Fibers

3 Mesh 31 Fiber supplying machine 33 Adhesive supplying machine 37 Aspirator

5 Sheet conveyor 55 Dryer

7 Particle supply area 71 Particle supply machine 73 Adhesive supply machine 75 Dryer

100 filter segments

240 Combustion type tobacco flavor inhalation article 250 Tobacco rod portion F1 First filter segment F2 Second filter segment 260 Tobacco shreds 270 Cigarette paper 280 Tipping paper member

300 Non-combustion heating type tobacco flavor inhalation article 310 Tobacco lot 320 Mouthpiece segment 330 Cooling segment 340 Center hole segment 350 Tobacco filler 360 Wrapper 370 Cylindrical member 380 Perforation 390 Filling layer 400 Inner plug wrapper 410 Outer plug wrapper 420 Mouthpiece lining paper

Claims (13)

A sheet for a flavor inhalation article filter comprising fibers, particles having a particle size of 20 to 200 mesh, and an adhesive,
The weight of the particles present in the region from the center in the thickness direction to one surface/the weight of all particles is defined as the distribution ratio CA,
When the weight of the particles present in the region from the center in the thickness direction to the other surface/the weight of all particles is defined as a distribution ratio CB,
CA>CB and CA:CB=70-90:10-30;
A filter sheet for flavor inhalation products. The sheet according to claim 1, wherein the weight of the particles contained per unit area of the sheet is 7 to 80 g/ ^m2 . The sheet according to claim 1 or 2, wherein the CA is 60 to 100 and the CB is 0 to 40. The weight of the particles present in a 5% area from one surface in the thickness direction/the weight of all particles is defined as the distribution ratio CAs.
When the weight of the particles present in a 5% area from the other surface in the thickness direction/the weight of all particles is defined as a distribution ratio CBs,
CAs are 0-10 and CBs are 0-5;
The sheet according to any one of claims 1 to 3. The particles are
Contains an adsorbent or component releasing agent,
The sheet according to any one of claims 1 to 4. A sheet according to any one of claims 1 to 5, wherein the fibers are wood pulp fibers. 7. The sheet according to claim 6, wherein the weight of the wood pulp fibers contained per unit area of the sheet is 25 to 50 g/ ^m2 . The sheet according to any one of claims 1 to 7, wherein the adhesive is polyvinyl alcohol, a vinyl acetate acrylic copolymer, or a mixture thereof. The sheet according to any one of claims 1 to 8, wherein the weight of the adhesive contained per unit area of the sheet is 4 to 40 g/ ^m2 . The following steps:
Step 1: A sheet is formed by placing fibers on a mesh that is sucked from the back side. Step 2: An adhesive is added to one side A of the sheet. Step 3: The sheet obtained in step 2 is turned over. Step 4: The particles and adhesive are added simultaneously to the other side B of the sheet, or the particles are added and then the adhesive is added.
The method for producing a sheet according to any one of claims 1 to 9, comprising: The method of claim 10, wherein step 1 includes blowing the fibers onto the mesh using a gas medium. The manufacturing method according to claim 10 or 11, further comprising a step of drying surface A of the sheet between steps 2 and 3. A flavor inhalation article filter comprising the sheet according to any one of claims 1 to 9.