Filter containing added liquid, flavor inhalation article including said filter, and flavor inhalation article package

Abstract

The present invention addresses the problem of providing: a filter in which a liquid having phenol filtration capability is prevented from leaking out even after prolonged storage; and a flavor inhalation article equipped with said filter.　The problem is solved by a filter that is for a flavor inhalation article, and that has a filtering medium including a biodegradable material, and a paper roll wound around the filtering medium. The filtering medium contains a liquid having a phenol filtration capability. A surface of the roll paper where a contact is made with the filtering medium is made of a layer exhibiting liquid-repellent properties with respect to said liquid.

Description

[Technical field]

[0001] The present invention relates to a filter to which a liquid has been added, a flavor inhalation article including the filter, and a flavor inhalation article package. [Background technology]

[0002] Conventionally, acetate fibers have been widely used as filter media in smoking articles such as filter cigarettes. In recent years, in order to reduce the environmental load, the use of degradable materials as filter media in various products has been promoted, and the use of biodegradable materials such as paper filters as filter media in smoking articles has also been considered. However, compared to filters using acetate fibers, paper filters have a lower filtering performance for irritating components such as phenols, and tend to result in a harsh smoking taste. Therefore, attempts have been made to improve the taste by imparting the function of filtering irritating components such as phenols to paper filters.

[0003] For example, Patent Document 1 discloses a filter to which triacetin has been added in order to reduce phenol. On the other hand, filters to which liquid has been added are prone to leakage of liquid during storage, so Patent Document 1 adds cellulose acetate to reduce leakage. Patent Document 2 also discloses that the viscosity of the liquid is set to a predetermined value, and that wrapping paper having an impermeable layer is used. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2019 / 149742 [Patent Document 2] JP 2020-36534 A Summary of the Invention [Problem to be solved by the invention]

[0005] It was found that the method described in Patent Document 1 could not sufficiently prevent liquid leakage, and liquid may leak from the filter into the wrapping paper or tipping paper during storage. Even if a liquid-impermeable layer was formed on the wrapping paper with reference to Patent Document 2, it was sometimes not possible to sufficiently prevent liquid leakage.

[0006] As described above, the techniques described in the patent documents were unable to stably retain in the filter a liquid having phenol filtering ability that was added to the filter. The present invention provides a filter and a flavor inhalation article including the filter, in which leakage of a liquid having phenol filtering ability is suppressed even after storage. [Means for solving the problem]

[0007] As a result of intensive research, the inventors found that even if a liquid-impermeable layer is formed on the roll paper, when the roll paper is stored for a long period of time, liquid may diffuse along the surface of the roll paper toward the longitudinal direction of the filter and leak out. In response to this, they found that the leakage of liquid having phenol filtering ability can be suppressed by making the surface of the roll paper in contact with the filter medium liquid-repellent to liquid having phenol filtering ability, and arrived at the present invention.

[0008] That is, the present invention is as follows. [1] A filter for a flavor inhalation article, comprising: The filter medium includes a filter material containing a biodegradable material, and a wrapper around the filter material. The filter medium contains a liquid having a phenol filtering ability, A filter, wherein the surface of the wrapper that comes into contact with the filter medium is made of a layer that is liquid-repellent to the liquid. [2] The liquid spreading area on the liquid-repellent layer is 35 mm 2 The filter according to [1], [3] The filter according to [1] or [2], wherein the wrapper paper comprises a substrate and a liquid-repellent layer formed on the surface of the substrate that comes into contact with the filter medium. [4] The filter according to any one of [1] to [3], wherein the liquid is one or more selected from the group consisting of polypropylene glycol, polypropylene glycol glyceryl ether, polybutylene glycol, diglycerin, sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, polyethylene glycol, and caprylyl glycol. [5] The filter according to any one of [1] to [4], wherein the liquid is polypropylene glycol having a molecular weight of 2000 or more and 4000 or less, polypropylene glycol glyceryl ether having a molecular weight of 3000 or more and 4000 or less, or diglycerin. [6] The filter according to any one of [1] to [5], wherein the liquid-repellent layer contains one or more materials selected from the group consisting of starch, cellulose nanofiber, ethyl cellulose, nitrocellulose, gum arabic, aluminum, paraffin, polyethylene, polypropylene, polyvinyl alcohol, fluororesin, acrylic resin, and silicone. [7] The filter according to any one of [1] to [6], wherein the liquid-repellent layer contains one or more selected from the group consisting of ethyl cellulose, acrylic resin, paraffin, polyethylene, polypropylene, fluororesin, and silicone. [8] The filter according to any one of [1] to [5], wherein the liquid-repellent layer is made of liquid-repellent paper. [9] A flavor inhalation article comprising a tobacco rod wrapped in cigarette paper, a filter as described in any one of [1] to [8], and tipping paper connecting the tobacco rod and the filter.

[10] The flavor inhalation article described in [9], wherein at least one of the wrapping paper or the tipping paper has a colored portion.

[11] A flavor inhalation article package in which the flavor inhalation article described in [9] or

[10] is packaged, wherein the flavor inhalation article is directly wrapped in an inner wrapper, and at least the portion of the inner wrapper that comes into contact with the filter of the flavor inhalation article has a layer that is liquid-repellent to liquids having phenol filtering ability.

[12] The flavor inhalation article package described in

[11] , wherein the liquid-repellent layer of the inner wrapper contains one or more materials selected from the group consisting of starch, cellulose nanofiber, ethyl cellulose, nitrocellulose, gum arabic, aluminum, paraffin, polyethylene, polypropylene, polyvinyl alcohol, fluororesin, acrylic resin, and silicone.

[13] The flavor inhalation article package described in

[11] or

[12] , wherein the liquid-repellent layer of the inner wrapper contains one or more materials selected from the group consisting of ethyl cellulose, acrylic resin, paraffin, polyethylene, polypropylene, fluororesin, and silicone. Effect of the Invention

[0009] According to the present invention, it is possible to provide a filter and a flavor inhalation article including the filter, in which leakage of a liquid having phenol filtering ability is suppressed even after storage. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing a first configuration example of a flavor inhalation article according to an embodiment of the present invention. [Diagram 2] 2 is a schematic diagram showing a second configuration example of the flavor inhalation article according to the embodiment of the present invention. FIG. [Diagram 3] 1 is a schematic diagram showing a third configuration example of a flavor inhalation article according to an embodiment of the present invention. FIG. [Figure 4] 1 is a graph showing the spreading area of ​​polypropylene glycol glyceryl ether (PPG-GE) for each test material. [Diagram 5] 1 is a graph showing the spreading area of ​​diglycerin for each test material. [Figure 6] 1 is a graph showing the phenol filtration ability of each additive in cigarette samples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The present invention will be described in detail below with reference to embodiments and examples. However, the present invention is not limited to the following embodiments and examples, and can be modified and implemented as desired without departing from the gist of the present invention.

[0012] <Filter> One embodiment of the present invention is a filter for a flavor inhalation article, comprising a filter medium containing a biodegradable material and a roll paper around which the filter medium is wound, the filter medium containing a liquid having phenol filtering ability, and the surface of the roll paper in contact with the filter medium comprising a layer having liquid repellency to the liquid (hereinafter also referred to simply as a "layer having liquid repellency"). The roll paper having a liquid-impermeable layer described in Patent Document 2 can prevent leakage in the direction penetrating the liquid-impermeable layer, but cannot prevent liquid from diffusing along the surface of the roll paper and leaking out from the end of the roll paper during long-term storage. On the other hand, the filter according to one embodiment of the present invention has a surface of the roll paper that comes into contact with the filter medium made of a layer that is liquid-repellent to the liquid having the phenol filtering ability, and therefore can prevent liquid from diffusing along the surface of the roll paper and prevent liquid leakage.

[0013] The form of the filter is not particularly limited, and may be a plain filter including a single filter segment, or a multi-segment filter including a plurality of filter segments, such as a dual filter or triple filter. According to the filter of this embodiment, even if it is a filter made of a single filter segment, leakage of liquid can be sufficiently suppressed.

[0014] The shape of the filter is not particularly limited and any known shape can be adopted. Usually, the filter can be cylindrical, and can have the following forms. The filter may also be provided with a section such as a cavity or recess that is hollow (hollow) in cross section in the circumferential direction.

[0015] The cross-sectional shape of the filter in the direction perpendicular to the long axis is substantially circular, and the diameter of the circle can be appropriately changed according to the size of the product, but is usually 4.0 mm or more, preferably 4.5 mm or more, more preferably 5.0 mm or more, and usually 9.0 mm or less, preferably 8.5 mm or less, more preferably 8.0 mm or less. If the cross section is not circular, the above diameter is assumed to be that of a circle having the same area as the area of ​​the cross section, and the diameter of that circle is applied. The circumference of the cross section perpendicular to the long axis of the filter can be changed appropriately according to the size of the product to be used, but is usually 14.0 mm or more, preferably 15.0 mm or more, more preferably 16.0 mm or more, and is usually 27.0 mm or less, preferably 26.0 mm or less, more preferably 25.0 mm or less. The length of the filter in the longitudinal direction can be appropriately changed according to the size of the product, but may be 5 mm or more, 10 mm or more, 15 mm or more, 17.5 mm or more, or 20.0 mm or more, and may be 40 mm or less, 35 mm or less, 32.5 mm or less, or 30.0 mm or less.

[0016] The airflow resistance per 120 mm in the axial direction of the filter is not particularly limited, but is usually 100 mmH2O or more, preferably 150 mmH2O or more, more preferably 200 mmH2O or more, and is usually 800 mmH2O or less, preferably 700 mmH2O or less, more preferably 600 mmH2O or less.

[0017] The airflow resistance of a filter is measured according to the ISO standard method (ISO6565), for example, using a filter airflow resistance measuring device manufactured by Cerulean Co., Ltd. The airflow resistance of a filter refers to the air pressure difference between the first end face and the second end face when air is passed from one end face (first end face) to the other end face (second end face) at a predetermined air flow rate (17.5 mL / s) in a state where air does not pass through the side of the filter. The unit is generally expressed in mmH2O. It is known that the relationship between the airflow resistance of a filter and the length of the filter is proportional within the length range usually used (lengths of 5 mm to 200 mm), and if the length is doubled, the airflow resistance of the filter is doubled.

[0018] <Filter media> The filter of this embodiment has a filter medium containing a biodegradable material. The biodegradable material is decomposed by microorganisms, so it has a low environmental impact. Examples of biodegradable materials include cellulose, polylactic acid, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), polylactic acid / polycaprolactone copolymer, polyglycolic acid, polylactic acid / polyether copolymer, butanediol / long-chain dicarboxylic acid copolymer, polybutylene adipate / terephthalate, polytetramethylene adipate-co-terephthalate, polyethylene terephthalate succinate, polybutylene succinate, polybutylene succinate adipate, and polyvinyl alcohol, and cellulose is particularly preferred. A filter using a filter medium containing cellulose is also called a paper filter.

[0019] The filter material containing cellulose is typically paper made of wood pulp. The type of wood pulp is not particularly limited, and can be pulp of wood such as coniferous or broadleaf trees. The type of paper used in the filter is not particularly limited, and can be gathered paper, pleated paper, crimped paper, crepe paper, nonwoven fabric, shredded paper, etc. The method of making paper can be either wet or dry, and can be selected as desired. Furthermore, paper filters have the advantage of being more easily biodegradable than synthetic fiber tows such as cellulose acetate tow.

[0020] The form of the filter material constituting the filter is not particularly limited, and may be a form in which fibrous filter material is assembled or a form in which sheet-like filter material is assembled, but in particular, in the case of a paper filter, for example, a form in which paper having a corrugated structure with multiple valleys and ridges is assembled. When paper having a corrugated structure is used, the length direction of the valleys (or ridges) is arranged parallel to the longitudinal axis direction of the filter rod. When a paper having the above-mentioned wavy structure is used as the filter material constituting the paper filter, the average distance from valley to valley or from ridge to ridge of the waveform of the above-mentioned paper filter (also referred to as the "average pitch") is not particularly limited, but is usually 0.5 mm or more, preferably 1.0 mm or more, and usually 5.0 mm or less, preferably 4.0 mm or less. The average depth of the valleys of the corrugations of the above-mentioned paper filter is not particularly limited, but is usually 0.1 mm or more, preferably 0.2 mm or more, and usually 1.2 mm or less, preferably 1.0 mm or less.

[0021] Paper having a corrugated structure can be produced by subjecting a flat raw material sheet that does not have corrugations to a creping process that forms peaks and valleys. The thickness of the raw material sheet is not particularly limited, but is usually 20 μm or more, preferably 25 μm or more, more preferably 30 μm or more, and is usually 140 μm or less, preferably 130 μm or less, more preferably 120 μm or less. The basis weight of the raw material sheet is not particularly limited, but is usually 20 gsm or more, preferably 25 gsm or more, and usually 120 gsm or less, preferably 80 gsm or less, more preferably 45 gsm or less. The basis weight can be adjusted by adjusting the pulp content and filler content. , damp This can be adjusted by adjusting the processing conditions of the papermaking machine.

[0022] The width of the raw material sheet is not particularly limited, but is usually 50 mm or more, preferably 100 mm or more, more preferably 170 mm or more, and 300 mm or less, preferably 250 mm or less, more preferably 230 mm or less. The width of the raw material sheet is the length perpendicular to the long axis direction in which the peaks and valleys are continuously arranged in the paper having a corrugated structure, in other words, the length perpendicular to the direction corresponding to the long axis direction of the filter medium obtained by processing the paper having a corrugated structure.

[0023] The filter material used in this embodiment contains a liquid having phenol filtering ability. In this specification, "liquid" refers to a liquid at atmospheric pressure and 25°C. By the filter material containing the liquid having phenol filtering ability, it is possible to selectively remove certain components contained in the smoke during smoking, such as phenols, pyridines, and pyrazines, during smoking. When the filter of the present embodiment is a multi-segment filter, at least one filter segment needs to contain a liquid having phenol filtering ability.

[0024] The liquid having phenol filtering ability is preferably non-volatile at 25°C, specifically, the vapor pressure at 25°C is preferably 0.2 Pa or less. Furthermore, the surface tension of the liquid having phenol filtering ability is not particularly limited, but a larger surface tension is preferable since it tends to be less likely to leak through the filter.

[0025] Examples of the liquid having phenol filtering ability include polypropylene glycol, polypropylene glycol glyceryl ether, polyethylene glycol, diglycerin, polybutylene glycol, caprylyl glycol, sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, and copolymers thereof.Of these, polypropylene glycol, polypropylene glycol glyceryl ether, diglycerin, polybutylene glycol, sorbitan fatty acid ester, glycerin fatty acid ester, and polyglycerin fatty acid ester are preferred, and polypropylene glycol, polypropylene glycol glyceryl ether, and polybutylene glycol are particularly preferred.These may be used alone, or two or more may be mixed at any ratio.

[0026] When the liquid having phenol filtering ability is polypropylene glycol or polypropylene glycol glyceryl ether, the molecular weight is preferably 1000 or more, more preferably 2000 or more, and particularly preferably 3000 or more. On the other hand, the upper limit is not particularly limited, but may be 10000 or less. Since there is a tendency for the influence on ink smearing to be small, it is preferable that the molecular weight of polypropylene glycol and polypropylene glycol glyceryl ether is large.

[0027] The content of the liquid having phenol filtering ability in the filter medium is preferably 1 mg or more, more preferably 5 mg or more, and particularly preferably 10 mg or more, based on the entire filter including the filter medium and the wrapper. Also, it is preferably 250 mg or less, more preferably 50 mg or less, and particularly preferably 30 mg or less. When the amount of the liquid having phenol filtering ability is within this range, selective removal of specific components in tobacco smoke during use is ensured. In addition, the air flow resistance of the filter is not significantly changed, and the manufacturing suitability of the filter is not significantly impaired. The above content range may be the range when the above exemplified products are used alone, or may be the total amount range when multiple products are used in combination.

[0028] The liquid having phenol filtering ability used in this embodiment may contain known additives such as thickeners, fragrances, and colorants. The inclusion of a thickening agent can effectively prevent leakage of the liquid added to the filter and maintain a good appearance. The type of thickener can be used without any particular limitation as long as it is soluble in water or in a liquid having the above-mentioned phenol filtering ability, and examples thereof include xanthan gum, gellan gum, psyllium seed gum, pectin, carboxymethyl cellulose, hydroxypropyl cellulose, polyvinyl alcohol, agarose, pullulan, alginic acid, polyacrylic acid, urethane compounds, and alkali metal salts or alkaline earth metal salts thereof. Among these, carboxymethyl cellulose is a preferred example.

[0029] The content of the thickener in the filter medium varies depending on the type, but can be 0.5 to 200 mg / filter. For example, when carboxymethyl cellulose is used, the amount per filter can be 10 to 150 mg / filter.

[0030] A filter medium containing a liquid having phenol filtering ability can be obtained by adding a solution containing the above-mentioned liquid to the filter medium.

[0031] The content of the liquid having phenol filtering ability contained in the solution added to the filter medium can be 10 to 100% by weight. That is, the above liquid can be added to the filter medium alone, or can be added as a solution further containing other additives. Note that even when the above liquid is added alone, it may contain impurities such as water.

[0032] The thickener may be present in an amount of 1 to 80% by weight in the solution, depending on the type of thickener. The solution may also contain water. The water content in the solution may be 4 to 30% by weight. The concentration of each of the above components can be appropriately adjusted so that the content of the liquid having phenol filtering ability in the filter medium after storage is 1 to 250 mg / filter.

[0033] The viscosity of the solution used in the present invention is not particularly limited as long as it is within a range that does not significantly impair the manufacturability of the filter, and it is sufficient that the solution can be added to the filter medium and remain within the filter. For example, the viscosity at 25°C may be 10 mPa·s or more, preferably 100 mPa·s or more, and the viscosity at 80°C may be 1000 mPa·s or less.

[0034] The method of adding the solution to the filter medium is not particularly limited, and a known method can be used. Specifically, it can be a liquid feed by a pressure pump, a spray, or the like. When the filter medium constituting the filter is made of a plurality of materials, it can be added to some of the materials, or to all of the materials. It can also be added to a part of the filter medium, or it can be added substantially uniformly over the entire filter medium. The amount of the solution added can be 1 to 250 mg / 10 mm. If the amount of the solution added to the filter medium exceeds 250 mg / 10 mm, when the filter is deformed by an external force, the solution may seep out or leak out of the filter. The unit of solution addition, "10 mm," means 10 mm in the longitudinal direction of the filter, and mg / 10 mm is the weight (mg) of solution per 10 mm in the longitudinal direction of the filter.

[0035] The filter medium may include a crushable additive-releasing container (also referred to in the art as a "capsule") that includes a crushable shell such as activated carbon, gelatin, etc., in addition to the biodegradable material, the liquid having the above-mentioned phenol filtering ability, and the thickener. When the capsule is broken by a user of the flavor inhalation article before, during, or after use, it releases the additive contained in the capsule, which is then transferred in part or in whole to the airflow passing through the flavor inhalation article while the flavor inhalation article is in use, and transferred to the filter medium after use.

[0036] The form of the capsule is not particularly limited, and may be, for example, a fragile capsule, and the capsule is preferably spherical in shape. The additive contained in the capsule is not particularly limited, but preferably contains a fragrance or activated carbon. The additive may also contain a liquid having the above-mentioned phenol filtering ability. The form of the additive is not particularly limited, but is usually a liquid or solid. The use of capsules containing additives is well known in the art. Fragile capsules and their manufacturing methods are well known in the art. The fragrance and activated carbon may be known.

[0037] <Roller paper> The filter of this embodiment has a wrapping paper around which the filter medium is wrapped. When the filter is a multi-segment filter, the wrapping paper is preferably used to wrap two or more of these segments together. On the other hand, when two or more segments are individually wrapped in wrapping paper, the filter segments may be fixed by forming paper. The embodiment of the paper web is not particularly limited and may include one or more rows of a seam that includes an adhesive. The adhesive may include a hot melt adhesive. Also, the adhesive may include polyvinyl alcohol.

[0038] The material of the wrapper is not particularly limited, and any known material can be used, which may contain a filler such as calcium carbonate. The thickness of the wrapper is not particularly limited, but is usually 20 μm or more, preferably 30 μm or more, and usually 140 μm or less, preferably 130 μm or less, and more preferably 120 μm or less. The basis weight of the roll is not particularly limited, but is usually 20 gsm or more, preferably 22 gsm or more, and more preferably 23 gsm or more, and is usually 100 gsm or less, preferably 95 gsm or less, and more preferably 90 gsm or less.

[0039] The surface of the roll that comes into contact with the filter medium is made of a layer that is liquid-repellent to the liquid. By making the surface of the roll that comes into contact with the filter medium a layer that is liquid-repellent to the liquid having phenol filtering ability, it is possible to suppress the liquid from diffusing along the surface of the roll during storage. In this manner, the liquid can be retained in the filter without being held by a carrier such as silica gel or enclosed in a capsule or the like.

[0040] The liquid-repellent roll paper may be composed of only a liquid-repellent layer, or may be composed of a substrate and a liquid-repellent layer. When the roll paper is composed of a substrate and a liquid-repellent layer, the substrate may be coated with a coating agent containing a material constituting a layer having liquid-repellent properties against liquids having phenol filtering ability, which will be described later, and laminated on the substrate surface by means of coating or deposition, etc., to impart liquid-repellent properties to the substrate against liquids having phenol filtering ability. The substrate may be a known paper used for roll paper, or a nonwoven fabric made of a material such as a polymer. In addition, a paper (also called "liquid-repellent paper") that has been improved in oil resistance and water resistance by increasing the degree of beating of the substrate raw material or performing a calendaring process to control the smoothness and density of the surface may be used alone as the liquid-repellent layer, or the liquid-repellent paper may be used as the substrate and further laminated with the liquid-repellent layer. Examples of liquid-repellent paper include glassine paper. From the viewpoint of manufacturability, it is preferable that the liquid-repellent layer is homogeneous, but this is not limited thereto, and the materials constituting the liquid-repellent layer may differ in part, and the thickness of the liquid-repellent layer may differ.

[0041] Examples of the material constituting the layer having liquid repellency to the liquid having phenol filtering ability include one or more materials selected from polymer compounds, metals, and inorganic oxides. Examples of the polymeric compounds include polysaccharides, paraffin, polyolefins, polystyrene, polyvinyl, fluororesins, acrylic resins, natural rubber, synthetic rubber, silicone, natural resins, alkyd resins, and urethane compounds. Examples of the polysaccharides include starch, cellulose, ethyl cellulose, acetyl cellulose, nitrocellulose, and gum arabic. Examples of the polyolefins include polyethylene and polypropylene. Examples of the polyvinyls include polyvinyl alcohol, polyvinyl acetate, and polyvinyl chloride. Examples of the fluororesins include perfluoroalkyl group-containing compounds, more specifically, polytetrafluoroethylene. Examples of the acrylic resins include polymethyl acrylate and polymethyl methacrylate. Examples of the synthetic rubbers include polybutadiene. Examples of the silicones include polyoxydimethylsilylene. The material constituting the layer having liquid repellency may be a copolymer of these polymeric compounds.

[0042] The cellulose is particularly preferably cellulose nanofiber. The metal is aluminum. Mu et al. The following can be mentioned. Inorganic oxides include silica. ,alumina etc. Among these, one or more selected from the group consisting of starch, cellulose nanofiber, ethyl cellulose, nitrocellulose, gum arabic, aluminum, paraffin, polyethylene, polypropylene, polyvinyl alcohol, fluororesin, acrylic resin, and silicone are preferred, and ethyl cellulose, acrylic resin, paraffin, polyethylene More preferred is one or more selected from the group consisting of polypropylene, fluororesin, and silicone.

[0043] The material constituting the liquid-repellent layer can be appropriately selected from the above materials according to the type of liquid having phenol filtering ability to be used, so long as the material has an appropriate liquid repellency to the liquid. For example, when starch or aluminum is used among the above materials, it is preferable to select a liquid having phenol filtering ability from among diglycerin, sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, etc., which have a surface tension greater than that of polypropylene glycol glyceryl ether. In addition, among the above materials, when a perfluoroalkyl group-containing compound, polypropylene, paraffin, silicone, or cellulose nanofiber is used, the following spreading area is 35 mm from polypropylene glycol, polypropylene glycol glyceryl ether, polybutylene glycol, diglycerin sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, polyethylene glycol, caprylyl glycol, etc. 2 Any of the following combinations can be used: If the surface tension of the liquid is high, it tends to be difficult to spread across the surface of the paper web.

[0044] Surface tension can be measured, for example, by the pendant drop method (ds / de method). Specifically, liquid is pushed out from the tip of a vertically downward capillary, and the surface tension is calculated from the shape of the droplet (hanging drop) that the liquid forms. The maximum diameter (equatorial diameter) de of the hanging drop and the diameter ds of the hanging drop at a position de above the lowest surface of the hanging drop are used for the calculation.

[0045] 10 mg of a liquid having phenol filtering ability was dropped onto the liquid-repellent layer, and after leaving it to stand for 30 minutes in a room at a temperature of 22°C and a humidity of 60% RH, the spreading area of ​​the liquid (hereinafter sometimes simply referred to as the "spreading area") was 60 mm 2 Preferably less than 35 mm 2 The following is more preferable: When the spreading area is within the above range, it is possible to prevent the liquid added to the filter medium from diffusing along the surface of the wrapper and leaking out from the end of the wrapper. The spread area is measured by the following method. 10 mg of a liquid having phenol filtering ability is dropped onto a test material using a microsyringe, and an image of the liquid that has spread after 30 minutes in a room at a temperature of 22°C and a humidity of 60% RH is obtained using a Keyence digital microscope (VHX-100). The periphery of the spread liquid is manually identified from the obtained image, and the area of ​​the region surrounded by the identified periphery is calculated.

[0046] The average thickness of the liquid-repellent layer is not particularly limited, and can be appropriately set depending on the combination of the substrate and the liquid-repellent layer. The average thickness of the liquid-repellent layer can be 5 to 30 μm. When the liquid-repellent layer is provided on the substrate, the ratio of the thickness of the liquid-repellent layer to the thickness of the substrate can be about 0.01 to 1.0 when the thickness of the substrate is 1. In addition, when the layer is formed by applying a coating agent, the amount of application can be appropriately adjusted to achieve the above thickness. As long as there is no problem with liquid repellency or manufacturability, it is preferable to apply a smaller amount of coating from the viewpoint of manufacturing costs. However, if there are uncoated areas, there is a risk of liquid leakage from those areas, so it is necessary to form a layer over the entire substrate.

[0047] The material, thickness, weight, etc. of the formed paper are not particularly limited, and may be the same as the above-mentioned wrapping paper. At least a part of the formed paper may be liquid-repellent to a liquid having phenol filtering ability.

[0048] <Filter manufacturing method> The method of producing the filter is not particularly limited, and it can be produced by a known method.For example, when the filter is a paper filter, it can be produced by a method of forming a filter rod using paper obtained by papermaking from wood pulp.Specifically, for example, the paper obtained by papermaking is creped to give the paper a wavy wrinkle, and then the paper having this wavy structure is gathered, wrapped with a roll paper to form a rod, and cut to a desired length to produce a paper filter.

[0049] As the papermaking machine, a conventionally known machine such as a cylinder papermaking machine, an inclined short wire papermaking machine, a Fourdrinier papermaking machine, a short wire papermaking machine, etc. can be used, and the papermaking machines can be combined appropriately according to the required properties. In addition, dry manufacturing methods such as resin bonded nonwoven fabrics, thermal bonded nonwoven fabrics, and spunlace nonwoven fabrics can also be used appropriately.

[0050] Filters other than paper filters can be manufactured by forming the material into a sheet and then manufacturing the filter according to the above-mentioned paper filter manufacturing method. Alternatively, filters can be manufactured by gathering fibrous materials, wrapping them in a wrapping paper to form a rod, and cutting them to the desired length.

[0051] The liquid having phenol filtering ability can be added at any step, for example, after creasing and before forming into a rod-like filter medium. Alternatively, the liquid having phenol filtering ability can be added to the rod-like filter medium using a microsyringe.

[0052] <Flavor suction articles> Another embodiment of the present invention is a flavor inhalation article comprising a tobacco rod wrapped with cigarette paper, the filter, and tipping paper connecting the tobacco rod and the filter. In this specification, the term "flavor inhalation article" is a general term for inhalation articles that allow a user to taste flavors such as tobacco flavors. More specifically, flavor inhalation articles include combustion flavor inhalation articles that provide a user with a flavor by burning a flavor source, non-combustion heating flavor inhalation articles that provide a user with a flavor by heating a flavor source without burning it, and non-combustion non-heating flavor inhalation articles that provide a user with a flavor generated from a flavor source without heating or burning the flavor source.

[0053] <Tobacco rod> The tobacco rod is not particularly limited as long as it is a known embodiment, but is usually a form in which a tobacco filler is wrapped in cigarette paper. The tobacco filler is not particularly limited, and known materials such as tobacco shreds and reconstituted tobacco sheets can be used. In this specification, cigarette paper refers to paper that wraps the tobacco filler, and is distinguished from wrapping paper, which is paper that wraps a filter material.

[0054] The moisture content of a typical tobacco filler such as tobacco shreds contained in a tobacco rod is 10 to 15% by weight, preferably 11 to 13% by weight. Such a moisture content suppresses the occurrence of rolling stains and improves the suitability for rolling when producing a flavor inhalation article. In addition, when the flavor inhalation article is a non-combustion heating type flavor inhalation article, the tobacco filler may contain an aerosol base material. The aerosol base material is a base material that generates an aerosol by being heated, and examples of the aerosol base material include glycerin, propylene glycol, and mixtures thereof.

[0055] There are no particular limitations on the material of the cigarette paper in which the tobacco filler is wrapped, and any known material may be used, which may also contain a filler such as calcium carbonate. Similarly to the wrapping paper, at least a part of the wrapping paper may be liquid-repellent to the liquid having the phenol filtering ability.

[0056] <Tip paper> The material of the tipping paper connecting the tobacco rod and the filter is not particularly limited, and any known material can be used, which may contain a filler such as calcium carbonate. Similarly to the wrapping paper, at least a part of the tipping paper may be liquid-repellent to the liquid having the phenol filtering ability.

[0057] When at least one of the cigarette paper or the tipping paper has a colored portion, if the liquid added to the filter seeps out or leaks, the ink or the like used in the colored portion will bleed, and the bled ink will further fall off (also called ink drop), significantly impairing the appearance of the flavor inhalation article. Therefore, the above filter is suitable for use in a flavor inhalation article in which at least one of the cigarette paper or the tipping paper has a colored portion.

[0058] An example of a flavor inhalation article according to this embodiment will be described below with reference to the drawings. However, the present invention is not limited to the following embodiment, and can be modified as appropriate without departing from the gist of the present invention.

[0059] 1 to 3 are schematic diagrams of a combustion type flavor inhalation article (cigarette) in which the filter is a plain filter or a multi-segment filter. In FIG. 1, each filter section made of a filter medium 2 is wrapped with a wrapping paper 4 to form a filter 7. In the case of a multi-segment filter as shown in FIGS. 2 and 3, each filter section wrapped with a wrapping paper 4 is wrapped with a forming paper 5 to form the filter 7. Furthermore, the filter 7 is connected to a tobacco rod 1 by a tipping paper 6.

[0060] The filter used in the present invention can suppress leakage of liquid even when it is composed of a single filter segment as shown in Fig. 1. That is, the filter to which the liquid has been added may be adjacent to the tobacco rod. On the other hand, when the filter is a multi-segment filter, it is considered that the seepage or leakage of the solution into the tobacco shreds or tobacco paper constituting the tobacco rod can be more effectively prevented by adding the solution only to a filter section of two or more filter sections that is not in contact with the tobacco rod. Specifically, the solution may be added to one of the filter sections marked with an "*", and a preferred embodiment is to add the solution to the filter section that constitutes the end on the mouth side (Figure 2). In addition, when there are three or more filter sections, an embodiment is also possible in which the solution is added only to the filter section that does not contact the tobacco rod and does not constitute the end on the mouth side, that is, the filter section that constitutes the middle in the axial direction (Figure 3).

[0061] In the present invention, as shown in Figures 1 to 3, not only filter sections exist continuously in the axial direction, but also embodiments in which there are no filter sections other than the section in contact with the mouth end of the filter, that is, embodiments in which there are gaps (also called cavities) between the filter sections, can be mentioned. The cavities can be formed by molding the above-mentioned molding paper or tipping paper into a cylindrical shape, but in this case, it is not necessarily required that the molding paper or the like that forms the cavity has a layer that is liquid-repellent to liquids that have phenol filtering ability.

[0062] The tipping paper used in the present invention may be provided with ventilation holes for adjusting the ratio of mainstream tobacco smoke and air inhaled during smoking (shown by dotted lines on the tipping paper indicated by 6 in Figures 1 to 3). There are no particular limitations on the arrangement of the ventilation holes, and examples include an arrangement in one or two rows in the circumferential direction of the cigarette. There are also no particular limitations on the pitch of the ventilation holes, the size of the holes, or the method of opening the holes. The position of the ventilation hole is determined from the tobacco rod end of the filter to which the specific solution is added. Suction end It is preferable that the solution is placed at least 2 mm away from the filter section toward the side of the filter. This is expected to improve the smoking taste. In addition, from the viewpoint of preventing leakage of the liquid, it is preferable that there are no ventilation holes on the filter where the solution is added or between the filter sections.

[0063] <Flavor inhalation product package> When the flavor inhalation article of this embodiment is provided to a user, the flavor inhalation article is usually packed in a known package to form a flavor inhalation article package. In the flavor inhalation article package, the flavor inhalation article is directly wrapped in an inner wrapper, and at least a portion of the inner wrapper that comes into contact with the filter of the flavor inhalation article preferably has a liquid-repellent layer. In particular, the inner wrapper preferably has a liquid-repellent layer in a portion that comes into contact with an end face of the filter on the mouth side.

[0064] The filter of the flavor inhalation article of the present embodiment is added with the specific liquid as described above and is wrapped with the surface of the wrapper that is liquid repellent against the liquid, so that the function is fully exerted when the filter is filled in a package. In other words, since the liquid is unlikely to diffuse in the package, it is expected that the liquid is unlikely to volatilize from the filter. Furthermore, by providing a liquid-repellent layer on the portion of the inner wrapper that comes into contact with the filter of the flavor inhalation article, it is possible to prevent the liquid from leaking and diffusing from the filter material into the inner wrapper.

[0065] The shape and volume of the package for filling the flavor inhalation article of this embodiment are not limited, and a conventional package can be used. The preferred range of package volume is, for example, 30 to 150 cm 3 The following can be mentioned. The number of flavor inhalation articles packed in a package is usually 20, but may be changed as appropriate depending on the shape and size of the package.

[0066] The inner wrapper may be composed of only a layer having liquid repellency, or may be composed of a substrate and a layer having liquid repellency. When the inner wrapper is composed of a substrate and a layer having liquid repellency, the substrate may be imparted with liquid repellency against liquids having phenol filtering ability by laminating a liquid-resistant agent on the substrate surface by means of coating or vapor deposition. The substrate may be a known paper used for inner wrappers, or a nonwoven fabric made of a material such as a polymer. In addition, the liquid-repellent paper may be used alone as the liquid-repellent layer, or the liquid-repellent paper may be used as the substrate and the liquid-repellent layer may be further laminated thereon. The material constituting the liquid repellent layer may be the same as that of the wrapping paper. The material constituting the liquid repellent layer of the inner wrapper may be the same as or different from that used for the wrapping paper. EXAMPLES

[0067] The present invention will be described more specifically with reference to examples. However, the present invention is not limited to the description of the following examples as long as it does not depart from the gist of the present invention.

[0068] <Liquid spreading test> In a room with a temperature of 22°C and a humidity of 60% RH, 10 mg of additive was dropped onto the test material using a microsyringe, and the spread area of ​​the droplet after 30 minutes was measured. In the test, polypropylene glycol glyceryl ether (PPG-GE, molecular weight 4000) and diglycerin were used as additives. In addition, the test materials included plain paper for wrapping paper, as well as commercially available starch-coated paper, fluororesin (compound containing perfluoroalkyl groups)-coated paper, glassine paper (manufactured by Yoshiyo Kobo), aluminum foil (manufactured by Mitsubishi Aluminum), polypropylene film (manufactured by Seisan Nippon Sha), polyethylene-coated paper (manufactured by Fukusuke Kogyo), paraffin-coated paper (manufactured by Kojima Masanao Do Honpo), silicone-coated paper (manufactured by Nippon Paper Crecia), cellulose nanofiber film (manufactured by Chuetsu Pulp Industry), nitrocellulose-coated paper, Ethyl cellulose coated paper,The droplets spread across the test materials immediately after application, but the spread of the droplets stabilized after 30 minutes under all conditions except for plain paper.

[0069] The area where the droplets spread on the test material was calculated by image processing. A Keyence digital microscope (VHX-100) was used to measure the spread of the droplets. The magnification of the digital microscope was set to 5 times, and the focus was adjusted to a level where the standard scale could be clearly distinguished. The calibration of the device was performed by specifying the length of a 10 mm range of the standard scale using the attached software. 10 mg of additive was dropped onto a test material of about 3 cm square, and 30 minutes after the spread had stabilized, the test material was imaged from above using a digital microscope. At that time, the level of the irradiation light was adjusted so that the periphery of the dropped additive droplet was clearly visible. The periphery of the additive droplet was precisely specified for the image using the measurement-manual-polygon mode of the attached software, and the spread area was calculated.

[0070] The average value and 95% confidence interval (95% CI) of the spread area when three measurements were performed are shown in Table 1. The results using PPG-GE are shown in Figure 4, and the results using diglycerin are shown in Figure 5. The dashed lines in Figures 4 and 5 indicate the area where the spread area is 36.3 mm 2 Indicates the location. From Table 1 and Figures 4 and 5, it can be seen that the test material having a liquid-repellent layer significantly suppresses the spreading of liquid.

[0071] [Table 1]

[0072] <Cigarette storage test> A 220 mm wide paper made of wood pulp was used as the original roll of the paper filter. After the paper was wrinkled, 25 mg of polypropylene glycol glyceryl ether (PPG-GE, molecular weight 4000) was added to one side of the original roll by pressurized spraying per 27 mm of original roll length. The added paper was folded to form a plurality of air passages each extending from one end to the other end, and wrapped in a rod shape with plain paper (basis weight 28 gsm), starch-coated paper (basis weight 25 gsm), or fluororesin (perfluoroalkyl group-containing compound)-coated paper (basis weight 28 gsm), and cut to a length of 108 mm to form a paper filter. The above coating was applied to one side, and the coated surface was rolled up with the coated surface on the inside (i.e., the surface in contact with the original roll). The prepared paper filter and tobacco rod were cut to a predetermined length, and then connected with tipping paper to form a cigarette. Here, the tobacco shreds and wrapping paper constituting the tobacco rod, as well as the tipping paper, were the same as those used in commercially available Winston (registered trademark). Twenty of each type of cigarette was enclosed in a small box and stored at room temperature for four months. After storage, the appearance of the cigarette paper was evaluated for liquid stains, and the staining rate was calculated from the number of cigarettes that were stained out of the 20. The results are shown in Table 2 below.

[0073] [Table 2]

[0074] As shown in Table 2, the liquid repellent layer in the wrapping paper can suppress the leakage of liquid. Specifically, in the above-mentioned liquid spreading test, the spreading area was about 50 mm 2 The combination of PPG-GE and starch reduced the occurrence of stains to 10%. 2 No staining or curling occurred with the combination of PPG-GE and perfluoroalkyl group-containing compound below.

[0075] <Ink effect test> Ten milligrams of each of the liquids described below were dropped onto the printed surface of a piece of tipping paper printed with a cork texture using a microsyringe. After one minute, the liquid was wiped off using a Kimwipe S-200 (manufactured by Nippon Paper Crecia Co., Ltd.). The degree of ink removal was then evaluated on a four-level scale from A to D as shown below. A: There is almost no visible ink loss and the appearance is not impaired. B: There is a little ink loss, but the appearance is almost unaffected. C: Ink has come off and the appearance has been damaged. D: There is a large amount of ink loss and the appearance is significantly damaged.

[0076] The liquids used were triacetin, polyethylene glycol (molecular weight 600), polypropylene glycol (molecular weight 700, 1000, 2000, 3000), polypropylene glycol glyceryl ether (molecular weight 500, 1000, 3000, 4000), polybutylene glycol (molecular weight 500, 700), diglycerin, and caprylyl glycol. The results are shown in Table 3 below.

[0077] [Table 3]

[0078] As shown in Table 3, the effect on ink smearing differed depending on the liquid. It was also found that in the case of polymers, liquids with a higher degree of polymerization (higher molecular weight) have a smaller effect on ink smearing. In the present invention, seepage or leakage of the liquid added to the filter can be sufficiently suppressed. On the other hand, even if a minute amount of the liquid added to the filter during production adheres to the cigarette paper or tip paper having a colored portion, when polypropylene glycol with a molecular weight of 1000 or more, polypropylene glycol glyceryl ether with a molecular weight of 1000 or more, polybutylene glycol with a molecular weight of 500 or more, diglycerin, or caprylyl glycol is used as the liquid added to the filter, it is possible to suppress the appearance of the flavor inhalation article from being damaged by ink smearing.

[0079] <Phenol filtration ability test> Cigarette samples were prepared as follows. First, a paper filter with a length of 27 mm and a diameter of 7.7 mm was prepared. Specifically, a paper filter with a corrugated shape (basis weight 40 g / m 2 ) was folded so as to form multiple air flow paths each extending from one end to the other, wrapped in plain paper for wrapping, and cut to a length of 120 mm to prepare a filter rod. The air resistance of the filter rod was adjusted to 400 mmH2O and the filter diameter to 7.7 mmφ. This filter rod was cut to a length of 27 mm, and 25 mg of a commercially available additive was added using a microsyringe. The filter was then stored at room temperature for at least 2 days to stabilize the distribution of the additive within the filter, and used as a paper filter for testing. The additives used were polypropylene glycol (molecular weight 2000), polypropylene glycol glyceryl ether (molecular weight 4000), polyethylene glycol (molecular weight 600), diglycerin, polybutylene glycol (molecular weight 700), caprylyl glycol, sorbitan fatty acid ester (sorbitan monooleate), glycerin fatty acid ester (glycerin diacetate monolaurate), polyglycerin fatty acid ester (polyglycerin trilaurate), or propylene glycol fatty acid ester (propylene glycol monopalmitate). Then, a commercially available Winston tobacco rod and the above filter were joined to prepare cigarette samples of each level.

[0080] The aforementioned cigarette samples were subjected to smoking tests and analyses under the following conditions. Using an automatic smoking machine (Cerulean SM410), cigarette samples were automatically smoked under the conditions of smoke volume 17.5 mL / sec, puff time 2 sec / puff, and puff frequency 1 puff / min, and the particulate matter (TPM) in the cigarette smoke was collected with a Cambridge filter (Borgwaldt 44 mmφ). The amount of TPM was measured by the mass difference of the Cambridge filter before and after smoking. The Cambridge filter was then immersed in 10 mL of the phenol extraction solvent shown in Table 4 below placed in a screw tube bottle and shaken to obtain an analytical sample. 1 μL of the obtained analytical sample was collected with a microsyringe and analyzed by gas chromatography-mass spectrometry (GC-MSD: Gas Chromatography-Mass Selective Detector). The GC used was Agilent G7890A manufactured by Agilent Technologies Inc., and the MSD used was Agilent_5795C manufactured by Agilent Technologies Inc.

[0081] [Table 4] Using the above method, the amount of TPM per cigarette and the amount of phenol in the tobacco smoke were measured for each cigarette sample. The amount of phenol in the tobacco smoke was divided by the amount of TPM, and then standardized with the value of a paper filter without additives to evaluate the phenol filtering ability of the additives. The average and standard deviation of the evaluation results from three times are shown in Figure 6.

[0082] As shown in Figure 6, polypropylene glycol (molecular weight 2000), polypropylene glycol glyceryl ether (molecular weight 4000), polyethylene glycol (molecular weight 600), diglycerin, polybutylene glycol (molecular weight 700), caprylyl glycol, sorbitan fatty acid ester (sorbitan monooleate), glycerin fatty acid ester (glycerin diacetate monolaurate), polyglycerin fatty acid ester (polyglycerin trilaurate), and propylene glycol fatty acid ester (propylene glycol monopalmitate) all have the filtering ability for phenol. Of these, polypropylene glycol (molecular weight 2000), polypropylene glycol glyceryl ether (molecular weight 4000), polyethylene glycol (molecular weight 600), diglycerin, polybutylene glycol (molecular weight 700), glycerin fatty acid ester (glycerin diacetate monolaurate), and polyglycerin fatty acid ester (polyglycerin trilaurate) have high phenol filtering ability, and it can be seen that polypropylene glycol (molecular weight 2000), polypropylene glycol glyceryl ether (molecular weight 4000), and polybutylene glycol (molecular weight 700) in particular have high phenol filtering ability. [Explanation of symbols]

[0083] 1 tobacco rod 2 Filter media 4 Roll paper 5 Molded paper 6. Tipping Paper 7 Filters

Claims

1. A filter for a flavor inhalation article, comprising: The filter medium includes a filter material containing a biodegradable material, and a wrapper around the filter material. The filter medium contains a liquid having a phenol filtering ability, The surface of the roll paper in contact with the filter medium is made of a layer having liquid repellency against the liquid, The liquid is at least one selected from the group consisting of polypropylene glycol, polypropylene glycol glyceryl ether, polybutylene glycol, sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, polyethylene glycol, and caprylyl glycol; The liquid-repellent layer of the filter comprises at least one material selected from the group consisting of starch, cellulose nanofiber, ethyl cellulose, nitrocellulose, gum arabic, aluminum, paraffin, polyethylene, polypropylene, polyvinyl alcohol, fluororesin, acrylic resin, and silicone.

2. The liquid spreads over an area of ​​the liquid-repellent layer of 35 mm ２ 2. The filter of claim 1 , wherein:

3. 3. The filter according to claim 1, wherein the wrapper comprises a substrate and the liquid-repellent layer formed on a surface of the substrate that contacts the filter medium.

4. 3. The filter according to claim 1, wherein the liquid is polypropylene glycol having a molecular weight of 2,000 to 4,000, polypropylene glycol glyceryl ether having a molecular weight of 3,000 to 4,000, or diglycerin.

5. 3. The filter according to claim 1, wherein the liquid-repellent layer comprises at least one material selected from the group consisting of ethyl cellulose, acrylic resin, paraffin, polyethylene, polypropylene, fluororesin, and silicone.

6. A tobacco rod wrapped in cigarette paper, the filter according to claim 1 or 2, and the A flavor inhalation article comprising a tobacco rod and a tip paper connecting the filter.

7. The flavor inhalation article according to claim 6 , wherein at least one of the wrapping paper and the tipping paper has a colored portion.

8. A flavor inhalation article package in which the flavor inhalation article described in claim 6 is packaged, wherein the flavor inhalation article is directly packaged in an inner wrapper, and at least the portion of the inner wrapper that comes into contact with the filter of the flavor inhalation article has a layer that is liquid-repellent to liquids having phenol filtering ability.

9. The flavor inhalation article package according to claim 8, wherein the liquid-repellent layer of the inner wrapper contains one or more materials selected from the group consisting of starch, cellulose nanofiber, ethyl cellulose, nitrocellulose, gum arabic, aluminum, paraffin, polyethylene, polypropylene, polyvinyl alcohol, fluororesin, acrylic resin, and silicone.

10. The flavor inhalation article package according to claim 8, wherein the liquid-repellent layer of the inner wrapper contains one or more materials selected from the group consisting of ethyl cellulose, acrylic resin, paraffin, polyethylene, polypropylene, fluororesin, and silicone.

Images