JP7773609B2 - Particle-containing filter sheet for flavor inhalation articles and method for producing the same - Google Patents

Description

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

A technology is known in which activated carbon is incorporated into smoking article filters to selectively remove volatile components from tobacco smoke and make the taste and aroma milder. For example, Patent Document 1 discloses a filtering material for smoking article filters obtained by mixing powdered activated carbon with wood pulp fibers that have been defibrated in the air, dispersing and collecting the mixture in the air to form a web, and then spraying an adhesive onto the web and drying it. Other known technologies involve placing adsorbents other than activated carbon, or particles carrying flavorings, within the filter.

Japanese Unexamined Patent Publication No. 48-85874

To improve production efficiency, flavor inhalation article filter sheets are typically manufactured at high speeds. Furthermore, the sheets are also handled at high speeds when processed into flavor inhalation article filters, so the sheets require high tensile strength. However, adding functional particles such as activated carbon to the sheet reduces the sheet's tensile strength. In light of these circumstances, an objective of the present invention is to provide a particle-containing, high-strength sheet for flavor inhalation article filters.

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 invention.
(1) A flavor inhalation article filter sheet 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 total weight of 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 total weight of particles is defined as a distribution ratio CB,
CA>CB,
Flavor inhalation product filter sheet.
(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), which contains 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, 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 being 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 the 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 according to (10), wherein step 1 includes blowing the fibers onto the mesh using a gas as a 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 filter sheet for particle-containing flavor inhalation articles that has high strength.

Cross-sectional view of a sheet for a flavor inhalation product filter 1 is a diagram showing a method for manufacturing a sheet for a flavor inhalation article filter; Conceptual diagram of flavor inhalation product filter FIG. 1 shows an embodiment of a combustible tobacco flavor inhalation article. FIG. 1 shows an embodiment of a non-combustion 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, a "flavor inhalation article" refers to an article with which a user inhales flavor. Among flavor inhalation articles, those containing 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 referred to as "smoking articles") that generate flavor through 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 through 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. Furthermore, if the particle size is too large, the particles are less likely to remain inside the sheet, and many of the particles will be present on the surface of the sheet. As a result, when using the sheet to manufacture a filter, there is a concern that the particles present on the surface of the sheet will come into contact with the surface of the device at high speed, damaging the device surface, or that particles will fall off the sheet, resulting in a deterioration in the mechanical properties of the sheet. From this perspective, the lower limit of the numerical range is preferably 28 mesh or more, and 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 more likely to be 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-releasing agents. Adsorbents are materials that adsorb a portion of the components to be inhaled, generated by flavor inhalation articles. Examples include porous materials such as activated carbon and zeolite, and polar group-containing materials such as cellulose. Component-releasing agents are materials that contain a substance and a carrier that supports the substance so that it can be released, or materials that themselves release the substance. In the former case, the substance includes flavorings such as menthol, and the carrier includes clathrate compounds such as cyclodextrin, or porous materials such as calcium carbonate and alumina. Examples of the latter include mint leaf particles obtained by crushing mint leaves and tobacco particles obtained by crushing tobacco plants. Mint leaf particles release menthol and other compounds, while tobacco particles release flavors. The entire particle may be composed of an adsorbent or component-releasing agent, or only a portion of the entire particle may be composed of an adsorbent or component-releasing agent. In the latter case, the lower limit of the total amount of adsorbent and component release agent in all particles is preferably 80% by weight or more, more preferably 90% by weight or more, and even more preferably 95% by weight or more. The upper limit is preferably 99% by weight or less, and more preferably 98% by weight or less.

(2) Fibers The fibers are not limited as long as they can form the matrix of the flavor inhalation article filter sheet. Examples include synthetic or semi-synthetic fibers made from cellulose acetate, PP, PE, PET, polylactic acid, etc. Natural fibers, such as plant fibers made from cellulose, are also included, but natural fibers are preferred from the perspective of reducing environmental impact. The length of the fibers is not particularly limited, but relatively short fibers are preferred for forming the matrix of the sheet, and their 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, roughness can be used as an indicator of thickness and length. From the perspective 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 using synthetic or semi-synthetic fibers, the cross-sectional shape of the fibers is not limited, but an R-shape or Y-shape is preferred, with a Y-shape being more preferred from a cost perspective. Furthermore, plasticizers and binders can be used to bond the contact points between fibers during sheet molding and improve sheet strength. When using natural fibers such as cellulose, water-soluble binders such as starch, modified starch, modified cellulose, PVA, or PVAc can be used alone or in combination, or latex can also be used. When acetate fiber is used as the fiber, binders for natural fibers such as those mentioned above can be used, and plasticizers capable of dissolving cellulose acetate (triacetin) can also be used.

Among these, 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 of their 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 Known adhesives can be used. Among these, from the viewpoints 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 adhesive weight (solids weight) per unit area of the sheet is preferably 4 to 40 g/ ^m2 . An excessively large amount of adhesive is economically disadvantageous and may affect the flavor. Furthermore, an excessively small amount may result in a small number of bonded points between fibers, which may cause problems such as fiber separation and an inability to maintain the tensile strength of the sheet.

(4) Particle Distribution Ratio Particles are distributed in the filter sheet for flavor inhalation articles with the following distribution ratios. The distribution ratios will be explained with reference to FIG. 1. FIG. 1 shows a cross section of the filter sheet for flavor inhalation articles. In the figure, 1 is the filter sheet for flavor inhalation articles, 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 flavor inhalation article filter sheet is preferably 7 to 80 g/m ² , more preferably 10 to 40 g/m ^2. If the particle weight is below 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 near the surface layer of the flavor inhalation article filter sheet is preferably low. This is because the presence of many particles near the surface layer of the flavor inhalation article filter sheet may damage the manufacturing equipment during production. From this perspective, the particle distribution rate CAs near the surface layer, as defined below, is preferably 0 to 10, more preferably 0 to 5, and even more preferably 0 to 3, and the particle distribution rate CBs is preferably 0 to 5, more preferably 0 to 3, and even more preferably 0 to 1. From the perspective of protecting the manufacturing equipment, it is more preferable that CAs and CBs are both 0. If CAs and CBs are not both 0, it is preferable that the particles are embedded in the flavor inhalation article filter sheet.
CAs = weight of particles present in a 5% area from one surface (surface A) in the thickness direction / total particle weight CBs = weight of particles present in a 5% area from the other surface (surface B) in the thickness direction / total particle weight

These distribution rates can be determined by image analysis of the cross section of the filter sheet for flavor inhalation articles, or by dividing the filter sheet for flavor inhalation articles along 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 sheet. The former method is preferred from the viewpoint of simplicity. Since the distribution rate in the filter sheet for 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 filter sheet for flavor inhalation articles.

(5) Shape of the Flavor Inhalation Article Filter Sheet The shape is appropriately adjusted depending on the application. For example, in the case of a cylindrical flavor inhalation article filter having a diameter of 24 mm and a height of 27 mm, the shape of the flavor inhalation article filter sheet is approximately 27 mm in length, 50 to 150 mm in width, and 0.8 to 2.0 mm in thickness. The thickness can be measured by optically measuring the cross section of the sheet using image analysis or the like. It can also be measured using the thickness measurement method for paper and paperboard specified in JIS P8118:2014. The apparent density of the flavor inhalation article filter sheet is also not limited, but in one embodiment it is 30 to 200 g/ ^m3 . The apparent density referred to here can be calculated by dividing the basis weight of the sheet, including all of the sheet components, such as fibers, adhesives, and particles, by the volume of the sheet.

2. Manufacturing Method The filter sheet for flavor inhalation articles can be manufactured by any method, but is preferably manufactured by a method including the following steps.
Step 1: A sheet is formed by placing fibers on a mesh that is being 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.

Figure 2 shows one embodiment of this 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) Process 1
In this process, fibers are placed on a mesh that is being suctioned 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 suctioned 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) Process 2
In this step, adhesive is applied to one side A of the sheet 10. The adhesive is as described above, and its amount is adjusted as appropriate. However, taking into account the amount of adhesive to be applied to the other side B, the final amount per unit area of the sheet is adjusted to approximately 4 to 40 g/ ^m2 in terms of adhesive solid weight. For example, approximately 2 to ²⁰ g/m2 of adhesive can be applied to side A, and approximately 2 to 20 g/ ^m2 of adhesive can be applied to side B in step 4. The adhesive supply device 33 is preferably a spray, and the adhesive is preferably sprayed. The sheet 10 to which the adhesive has been applied is transferred to the sheet conveyor 5 and preferably dried. Drying may be performed using a dryer 55 or by air drying. The sheet conveyor may be, for example, a belt conveyor. In this step, the adhesive is applied to side A, and the fibers are bonded together.

(3) Process 3
In this step, the sheet 10 obtained in step 2 is inverted. Specifically, the sheet 10 is transferred from the sheet conveying machine 5 to the sheet conveying machine 7, and is inverted so that the side B faces upward in the drawing.

(4) Process 4
In this process, the particles and adhesive are added simultaneously to the other side B of the sheet 10, or the particles are added first and then the adhesive is added. FIG. 2 shows an embodiment in which particles are supplied from a particle supplying machine 71 to side 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 mentioned above, the adhesive supplying machine 73 is preferably a spray. The amount of adhesive added in this process is adjusted so that the final weight of the adhesive solids is approximately 4 to 40 g/ ^m2 , as mentioned above. The amount of particles is appropriately adjusted to achieve the desired amount. The smoking article filter sheet 1 produced in this manner has a large number of particles on side 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 Articles Flavor inhalation article filters are prepared from flavor inhalation article filter sheets. The preparation method is not limited and can be carried out by known methods. For example, a filter segment 100 can be produced by rolling a cut flavor inhalation article filter sheet into a cylindrical shape, or by stacking multiple cut flavor inhalation article filter sheets 1, folding the sheets so that the cross section forms an S-shape, and packing them into a wrapper to form a cylindrical shape, as shown in FIG. 3 . The method shown in FIG. 3 can be carried out, for example, as described in Japanese Patent Publication No. 44-3727. Combining the filter segment with other segments, such as a flavor-generating segment, can produce a combustion-type tobacco flavor inhalation article, or a non-combustion-type tobacco flavor inhalation article, particularly a non-combustion-heat-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 the "filter portion") disposed adjacent thereto. While FIG. 4 shows an embodiment in which the second filter segment F2 is formed by the filter segment 100 of the present invention, the first filter segment F1 may also be formed by the filter segment 100 of the present invention. The tobacco rod portion 250 includes tobacco shreds 260 (shredded leaves, tobacco) and cigarette paper 270 wrapped therearound. 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 portion of its outer periphery. The number of vent holes may be one or more, for example, 10 to 40. When there are multiple vent holes, the vent holes can be arranged, for example, in a ring-shaped line around the outer periphery of the tipping paper member 280. The multiple vent holes can be arranged at approximately regular intervals. By providing the vent holes, air is drawn into the filter portion through the vent holes during inhalation. By diluting mainstream smoke with outside air through the vent holes, a product design with a desired tar value can be achieved. When F2 is the filter segment of the present invention, F1 may be a conventional acetate filter in which a cellulose acetate long fiber bundle is added with triacetin, a plasticizer, and then wrapped in a filter wrapper into a cylindrical shape; a nonwoven fabric filter in which a nonwoven fabric sheet containing fibers and an adhesive, which is the filter of the present invention from which particulate matter has been removed, is wrapped in a filter wrapper into a cylindrical shape; or a paper filter in which paper is creped and gathered and then wrapped in a filter wrapper into a cylindrical shape.

In combustible tobacco flavor inhalation products, the F2 segment length can be approximately 10 to 15 mm. In this case, the F2 segment can be filled with approximately 20 to 100 mg of granular material. If activated carbon is used as the granular material, it is desirable to fill the F2 segment with approximately 20 to 50 mg from the perspective of flavor quality when using the combustible tobacco flavor inhalation product, and it is desirable to fill the F2 segment with approximately 50 to 100 mg from the perspective of removing volatile components in mainstream smoke.

The user can enjoy the tobacco flavor by lighting the tip of the tobacco rod portion 250 and taking a puff by holding the mouth end of the first filter segment F1 between their mouths. By appropriately selecting the particles 13 in the filter segment 100, various functions can be imparted to the combustible tobacco flavor inhalation article 240.

(2) Non-Combustion Heat-Type Tobacco Flavor Inhalation Article FIG. 5 shows an example of a non-combustion heat-type tobacco flavor inhalation article. In the figure, reference numeral 300 denotes a non-combustion heat-type tobacco flavor inhalation article, which comprises a tobacco rod portion 310 and a mouthpiece segment 320. The mouthpiece segment 320 comprises 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 the "filter portion." 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 also be composed of the filter segment 100 of the present invention, in which case the second filter segment F2 can be omitted. During inhalation, the tobacco rod portion 310 is heated, and inhalation is performed from the end of the first filter segment F1.

The tobacco lot section 310 includes a tobacco filler 350 containing tobacco and an aerosol-generating substrate, and a tubular wrapper 360 that encases the tobacco filler 350. The tobacco filler 350 may further contain volatile flavoring ingredients and water. The size and preparation method of the tobacco used as the filler are not limited. For example, dried tobacco leaves shredded to a width of 0.8 to 1.2 mm may be used. When shredded to this width, the length of the shreds will be approximately 5 to 20 mm. Alternatively, dried tobacco leaves may be crushed to an average particle size of approximately 20 to 200 μm, homogenized, processed into sheets, and then shredded to a width of 0.8 to 1.2 mm. When shredded to this width, the length of the shreds will be approximately 5 to 20 mm. Furthermore, the above-mentioned sheet-processed tobacco may be gathered without being shredded and used as the filler. Alternatively, multiple cylindrically formed sheets may be arranged concentrically. Whether dried tobacco leaves are shredded or ground into a homogenized sheet, a variety of tobacco types can be used in the tobacco filler. Flue-cured, Burley, Orient, native, and other Nicotiana tabacum and Nicotiana rustica varieties can be blended appropriately to achieve the desired flavor. Details of these 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 a suitable solvent such as water to homogenize the material, then casting a thin layer of the homogenized material onto a metal plate or metal belt and drying it; and the third is a rolled sheet made by mixing a suitable solvent such as water and homogenizing it, then extruding it into a sheet. Details of the types of homogenized sheets mentioned above are disclosed in the "Encyclopedia of Tobacco," Tobacco Research Center, March 31, 2009.

The packing 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 range of the content of the tobacco filler 350 per tobacco lot portion 310 is 200 to 450 mg, and preferably 280 to 400 mg.

The aerosol-generating substrate is a material that can generate an aerosol when heated. Examples include, but are not limited to, glycerin, propylene glycol (PG), triethyl citrate (TEC), triacetin, and 1,3-butanediol. 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 perspective 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, cognac 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-hydroxybenzoate 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 2-Cyclohexen-1-one, 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, inmortell absolute, beta-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, honey, myristic acid, nerol, nerolidol, γ-nonalactone, nutmeg oil, δ-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, ω-pentadecalactone, peppermint oil, petitgrain Paraguay oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract Ingredients: lactic acid, propenylguaethol, propyl acetate, 3-propylidenephthalide, prune juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax absolute, marigold oil, tea distillate, α-terpineol, terpinyl acetate, 5,6,7,8-tetrahydroquinoxaline, 1,5,5,9-tetramethyl-13-oxacyclo(8.3.0.0(4.9))tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tridecanone, Examples of 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 filler 350 is not particularly limited, but from the viewpoint of generating sufficient aerosol and imparting a good flavor, it is typically 5 to 50% by weight, and preferably 10 to 20% by weight. If the tobacco filler 350 contains a volatile flavor component, the content of the volatile flavor component in the tobacco filler is not particularly limited, but from the viewpoint of imparting a good flavor, it is typically 100 ppm or more, preferably 10,000 ppm or more, and more preferably 25,000 ppm or more, relative to the weight of the tobacco filler, and is typically 100,000 ppm or less, preferably 50,000 ppm or less, and more preferably 33,000 ppm or less.

The method for 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 filled 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 these are transferred to the mouthpiece segment 320 by inhalation.

The cooling segment 330 is composed of a tubular member 370. The tubular member 370 can be, for example, a paper tube made by processing cardboard into a cylindrical shape. The tubular member 370 and the mouthpiece lining paper 420 (described later) are provided with perforations 380 that penetrate both. The presence of the perforations 380 allows outside air to be introduced into the cooling segment 330 during inhalation. As a result, the vaporized components of the aerosol generated by heating the tobacco rod portion 310 come into contact with the outside air, their temperature drops, and they liquefy, forming an aerosol. The diameter (distance) 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 two or more. For example, multiple perforations 380 may be provided around the circumference of the cooling segment 330.

The center hole segment 340 is composed of a filling layer 390 with a hollow portion and an inner plug wrapper 400 that covers the filling layer 390. The center hole segment 340 functions to increase the strength of the mouthpiece segment 320. The filling layer 390 can be, for example, a rod with an inner diameter of 5.0 to 1.0 mm, densely packed with cellulose acetate fibers, to which a plasticizer containing triacetin is added at 6 to 20 weight percent relative to the weight of the cellulose acetate and hardened. Because the filling layer 390 has a high fiber packing density, air and aerosol flow only through the hollow portion during inhalation, with almost no flow within 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 aerosol components. Because the filling layer 390 inside the center hole segment 340 is a fiber-filled layer, it feels pleasant 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 glue such as vinyl acetate glue 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 tobacco flavor inhalation article, i.e., the horizontal length in Figure 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 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 tobacco rod portion 310 may be 20 mm long, the cooling segment 330 may be 20 mm long, the center hole segment 340 may be 6 mm long, and the first filter segment F1 and the second filter segment F2 may each be 7.0 mm long. These individual segment lengths can be adjusted as appropriate depending on manufacturing suitability, required quality, etc. In this case, the weight of the granular material contained in the second filter segment F2 may be 15 to 50 mg. Furthermore, the center hole segment 340 may not be used, and only the filter portion may be located downstream of the cooling segment 330. By appropriately selecting the particles 13 in the filter segment 100, various functions can be imparted to the combustible 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 that heats 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 that uses electric resistance.

1 smoking article filter sheet 10 particle-free sheet 13 particles 15 fibers

3 Mesh 31 Fiber supply machine 33 Adhesive supply machine 37 Suction machine

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 portion 320 Mouthpiece segment 330 Cooling segment 340 Center hole segment 350 Tobacco filler 360 Wrapper 370 Cylindrical member 380 Perforations 390 Filler layer 400 Inner plug wrapper 410 Outer plug wrapper 420 Mouthpiece lining paper

Claims (12)

A flavor inhalation article filter sheet 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 total weight of 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 total weight of particles is defined as a distribution ratio CB,
CA>CB and CA:CB=60-90:10-40;
Flavor inhalation product filter sheet. 2. The sheet according to claim 1, wherein the weight of the particles contained per unit area of the sheet is 7 to 80 g/m ² . 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 coefficient 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;
3. The sheet according to claim 1 or 2. The particles are
containing an adsorbent or component-releasing agent,
The sheet according to any one of claims 1 to 3. A sheet according to any one of claims 1 to 4, wherein the fibers are wood pulp fibers. 6. The sheet according to claim 5, wherein the weight of the wood pulp fibers contained per unit area of the sheet is 25 to 50 g/m ² . The sheet according to any one of claims 1 to 6, wherein the adhesive is polyvinyl alcohol, vinyl acetate acrylic copolymer, or a mixture thereof. The sheet according to any one of claims 1 to 7 , 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 being 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 the 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 claims 1 to 8, comprising: The manufacturing method described in claim 9, wherein step 1 includes blowing the fibers onto the mesh using a gas medium. The manufacturing method described in claim 9 or 10, further comprising a step of drying side 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 8.