Filter for heat-not-burn flavor inhalation article

Abstract

To provide a filter capable of efficiently removing components that adversely affect aroma and taste.SOLUTION: A filter for a heat-not-burn flavor inhalation article includes an adsorbent-containing sheet. The amount of adsorbent per airflow resistance (Ch / PD) of the filter is preferably 5-15 (mg / mm H2O).SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a filter for a non-combustion heating type flavor inhalation article. [Background technology]

[0002] In recent years, non-combustion type flavor inhalation articles have been developed. In these articles, an aerosol is generated by heating an aerosol-generating base material. For these articles, as with conventional combustion-type smoking articles, improvement of the flavor is desired. In conventional combustion-type smoking articles, it is known that activated carbon is filled in an acetate filter to remove components that give an undesirable flavor. Patent Document 1 discloses a smoking article that includes a smoking material rod and a first sheet containing at least one diluent. The sheet may contain activated carbon. Patent Document 2 discloses a charcoal filter that is formed by adding activated carbon to the surface of activated carbon-containing paper, folding the paper, and filling the wrapper with the activated carbon. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2012-504972 [Patent Document 2] International Publication No. 2011 / 118042 Summary of the Invention [Problem to be solved by the invention]

[0004] The above patent documents specifically disclose combustion-type smoking articles, but do not refer to non-combustion heating-type flavor inhalation articles. The inventors found that if the filter described in the above patent document is directly applied to a non-combustion heating-type flavor inhalation article, sufficient filtering properties cannot be achieved. In view of the above circumstances, the present invention aims to provide a filter that can efficiently remove components that have an undesirable effect on the flavor and taste in a non-combustion heating-type flavor inhalation article. [Means for solving the problem]

[0005] The inventors have found that the above problems can be solved by a filter including an adsorbent-containing sheet. That is, the above problems are solved by the present invention described below. Aspect 1 A filter for a non-combustion heating type flavor inhalation article, comprising an adsorbent-containing sheet. Aspect 2 The amount of adsorbent per unit of air flow resistance (Ch / PD) is 5 to 15 (mg / mmH 2 O). Aspect 3 3. The filter of any one of the preceding claims, wherein the adsorbent is activated carbon. Aspect 4 The filter according to any one of aspects 1 to 3, wherein the sheet is surface-treated. Aspect 5 5. The filter of embodiment 4, wherein the surface treatment is creping. Aspect 6 A non-combustion heating type flavor inhalation article comprising the filter according to any one of aspects 1 to 5. Aspect 7 providing said sheet; and providing a filter comprising a cylindrical wrapper and the sheet disposed within the wrapper; A method for producing a filter according to any one of aspects 1 to 5, comprising: Aspect 8 8. The method of claim 7, further comprising subjecting the sheet to a surface treatment. Effect of the Invention

[0006] The present invention provides a filter that can efficiently remove components that have an undesirable effect on the flavor and taste of tobacco. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing an embodiment of a non-combustion heating type flavor inhalation article. [Diagram 2]FIG. 1 shows an embodiment of a non-combustion heating type flavor inhalation system. [Diagram 3] Correlation between Ch / PD and formaldehyde amount DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The present invention will be described in detail below. In the present invention, "X to Y" includes the extreme values ​​X and Y.

[0009] 1. Filter for non-combustion heating type flavor inhalation product The filter for non-combustion heating type flavor inhalation article (hereinafter also simply referred to as "filter") comprises a cylindrical wrapper and an adsorbent-containing sheet packed therein. The wrapper may be one normally used in the field. The adsorbent-containing sheet packed therein is preferably packed so that the ridges formed by folding are approximately parallel to the longitudinal direction.

[0010] Increasing the amount of adsorbent (Ch) makes it easier to remove components that have an undesirable effect on flavor and aroma, such as carbonyl components, but on the other hand, the airflow resistance (PD) increases, and there is a tendency for components that have a favorable effect on flavor and aroma to be removed. Therefore, the inventors have established an index called Ch / PD to standardize this balance. From this perspective, the amount of adsorbent per airflow resistance of the filter (Ch / PD) is set to 5 to 15 (mg / mmH 2 If Ch / PD is less than the lower limit, the removal of components that have an unfavorable effect on the flavor and aroma will be insufficient, and even necessary components will be removed, resulting in a deterioration of the flavor and aroma. On the other hand, even if Ch / PD exceeds the upper limit, the ability to reduce components that are unfavorable to the flavor and aroma will saturate. From the above, the lower limit of Ch / PD is preferably 6 (mg / mmH 2 O), and the upper limit is preferably 10 (mg / mmH 2 O) or less, more preferably 8 (mg / mmH 2 O) or less.

[0011] The airflow resistance was measured using a filter quality measuring device (SODIM, name: SODIMAX). Specifically, the sample was covered with an air-impermeable material (rubber, etc.) to prevent air from entering from the sides, and a 17.5 cm hole was placed on one end of the sample. 3 The differential pressure (mmH 2 O).

[0012] (1) Adsorbent-containing sheet The filter for the non-combustion heating type flavor inhalation article includes an adsorbent-containing sheet. The adsorbent is an agent capable of adsorbing components in the aerosol generated from the non-combustion heating type flavor inhalation article. Examples of the adsorbent include activated carbon, zeolite, activated alumina, and silica gel. Among them, activated carbon is preferred from the viewpoint of availability.

[0013] The content of the adsorbent in the adsorbent-containing sheet is adjusted so as to achieve the above Ch / PD. In one embodiment, the content of the adsorbent is 10 to 80 g / m 2 and more preferably 40 to 60 g / m 2 As stated above, the adsorbent is preferably activated carbon.

[0014] The surface area of ​​the activated carbon is preferably 500 to 3000 m 2 / g, more preferably 700 to 2500m 2 The surface area of ​​the adsorbent is the BET specific surface area, which is measured by the nitrogen adsorption method.

[0015] (2) Pulp The adsorbent-containing sheet preferably contains pulp as a matrix. Pulp is an aggregate of cellulose fibers extracted by mechanically or chemically treating a plant material. The plant material is preferably wood.

[0016] (3) Other fibers The adsorbent-containing sheet preferably contains synthetic fibers in addition to the pulp. Examples of synthetic fibers include polyester fibers. The polyester constituting the polyester fibers contains a diol residue and a diacid residue. The diol residue preferably contains an alkylene glycol residue having a carbon chain of 2 to 4, and more preferably contains an ethylene glycol residue. The diacid residue preferably contains a terephthalic acid, isophthalic acid, or phthalic acid residue, and more preferably contains a terephthalic acid residue. Such a polyester can be represented by the following formula. In the formula, n represents the number of repetitions, and m represents an integer of 2 to 4. In particular, polyesters containing an alkylene glycol residue having a carbon chain of 2 to 4, or an isophthalic acid or phthalic acid residue do not have an excessively high degree of crystallinity, and therefore improve the adhesion between the polyester fibers and the adsorbent particles.

[0017] [ka]

[0018] (4) Other ingredients The adsorbent-containing sheet preferably contains a binder. The binder enhances the adhesion between the fibers and between the fibers and the adsorbent. Known binders can be used, such as polyvinyl alcohol and vinyl acetate.

[0019] (5) Characteristics of the adsorbent-containing sheet The adsorbent-containing sheet preferably has the following characteristics, and the blending amounts of the above-mentioned components may be appropriately adjusted so as to achieve the characteristics. Tensile strength (ISO 1924-2): 5-30N / 15mm, more preferably 10-20N / 15mm Basis weight (ISO 536): 50~100g / m 2 , more preferably 70 to 90 g / m 2 Thickness: 100 to 300 μm, more preferably 150 to 250 μm Iodine adsorption performance (JIS K 1474): 300 - 2000 mg / g, more preferably 500 - 1500 mg / g Air permeability: 0 - 30000 CU, preferably 0 - 10000 CU, more preferably 0 - 2000 CU

[0020] The air permeability (unit: Corey unit (CU)) is the air flow rate (cm 2 per minute per 1 cm 3 ) under the condition of a differential pressure of 1 kPa. The air permeability can be measured using a PPM1000M air permeability meter manufactured by Cerulean Co., Ltd.

[0021] The effective surface area of the adsorbent in the 1 m 2 adsorbent-containing sheet is preferably 5000 - 70,000 m 2 / m 2 . The effective surface area is the total area of the adsorbent exposed on the sheet surface. This numerical range is based on the following.

[0022] In one aspect, the area buried in the sheet of the adsorbent is considered to be 30% - 50% of the surface area of one adsorbent on average. That is, the exposed area of the adsorbent is 50% - 70% on average. Assuming the surface area of the adsorbent is 1000 m 2 / g and the content of the adsorbent in the sheet is 10 g / m 2 , the effective surface area when 50% of the area is exposed on average is calculated as follows. 10 g / m 2 ×1000 m 2 / g × 50% = 5000 m 2 / m 2 Assuming the surface area of the adsorbent is 2000 m 2 / g and the content is 50 g / m 2 , the effective surface area when 70% of the area is exposed on average is calculated as follows. 50 g / m 2 ×2000 m 2 / g × 70% = 70,000 m 2 / m 2

[0023] (6) Surface treatment of the adsorbent-containing sheet In one embodiment, the adsorbent-containing sheet is not surface-treated. In another embodiment, the adsorbent-containing sheet is surface-treated. Examples of the surface treatment include known treatments, and a preferred example is crepe treatment. Crepe treatment refers to a treatment in which a sheet is wrinkled in a crepe-like manner using a doctor on a roll or the like. The crepe depth is preferably 0.1 to 0.5 μm.

[0024] (7) Filter characteristics The filter according to this embodiment has the ability to efficiently remove components that have an unfavorable effect on the flavor and taste, but is difficult to remove components that are important to the flavor and taste. In particular, it can efficiently remove formaldehyde, acetaldehyde, and acrolein, which were difficult to remove with conventional filters. The reason for this is not limited, but is presumed to be that voids of appropriate size are formed in the filter and the adsorbent is firmly held in the sheet matrix. In addition, since the filter can adsorb moisture during storage, it also has the effect of preventing the user from feeling hot during the initial puff of the suction article.

[0025] 2. Filter manufacturing method The filter is preferably manufactured by a method comprising step 1 of providing an adsorbent-containing sheet, and step 2 of providing a filter comprising a cylindrical wrapper and the sheet disposed within the wrapper.

[0026] Step 1 can be carried out by a known method using the above-mentioned components. For example, a paper sheet can be produced by preparing a slurry by mixing the above-mentioned components and making paper from the slurry. Also, a cast sheet can be produced by casting the slurry on a substrate.

[0027] Step 2 can also be carried out by a known method. For example, a filter can be produced by filling a folded adsorbent-containing sheet or a cut adsorbent-containing sheet into a cylindrical wrapper. Alternatively, a filter can be produced by folding an adsorbent-containing sheet into a cylindrical shape and wrapping the cylindrical shape with a wrapper. Before step 2, a step of subjecting the adsorbent-containing sheet to the above-mentioned surface treatment may be provided.

[0028] 3. Non-combustion heating type flavor inhalation product Fig. 1 shows one embodiment of a non-burning type roasting flavor inhalation article. In the figure, 10 is a non-burning type flavor inhalation article, 1 is a tobacco member, 3 is a cooling member, 5 is a mouthpiece, 51 is a first filter, 52 is a second filter, and V is ventilation. The size of the non-burning heating type flavor inhalation article is not limited. For example, the length may be about 50 to 80 mm, and the cross-sectional diameter may be about 5.5 to 7.5 mm.

[0029] (1) Tobacco parts A tobacco member is a substantially cylindrical member for generating flavor and aroma components contained in tobacco raw materials. A tobacco member includes a tobacco material and a cigarette paper (wrapper) that wraps the tobacco material. The shape of the tobacco material filled into the cigarette paper is not limited, and examples of the shape include a sheet, the sheet cut into a width of 0.8 to 1.2 mm, or a cut into a width of 0.8 to 1.2 mm. The sheet may be gathered, folded, or spirally wound without being cut, and filled into the cigarette paper to form a tobacco member. Alternatively, the sheet may be cut into strips and filled into the cigarette paper concentrically or with the longitudinal direction of the strip parallel to the longitudinal direction of the tobacco member to form a tobacco member.

[0030] The packing density of the tobacco material is not particularly limited, but is usually 200 mg / cm from the viewpoint of ensuring the characteristics of a non-combustion type flavor inhalation article and imparting a good smoking taste. 3 or more, preferably 250 mg / cm 3 The upper limit is usually 800 mg / cm. 3 or less, preferably 600 mg / cm 3The length of the tobacco member 1 is not limited, but is preferably 10 to 25 mm. Its diameter is also not limited, but is preferably 6 to 8 mm.

[0031] The tobacco material may generate steam when heated. The heating temperature is not limited, but is about 30 to 400°C. In order to promote the generation of aerosol, an aerosol source such as glycerin, propylene glycol, 1,3-butanediol or other polyol may be added to the tobacco material. The amount of the aerosol source added is preferably 5 to 50% by weight, more preferably 10 to 30% by weight, based on the dry weight of the tobacco material. In addition, known flavorings and the like may be added to the tobacco material.

[0032] (2) Cooling material The cooling member 3 is adjacent to the downstream side of the tobacco member 1. In the present invention, downstream refers to the direction toward the mouth end. The cooling member 3 is a member for promoting aerosolization by cooling flavor components and vapor generated in the tobacco member 1. The cooling member may be a hollow paper tube. The paper tube is preferably made of cardboard having higher rigidity than cigarette paper or tipping paper. The paper tube may be provided with ventilation V (openings). A plurality of ventilations are preferably provided along the circumference of the paper tube. The cooling member may be filled with a gathered sheet to improve heat exchange efficiency. The dimensions of the cooling member are not limited, but the length is preferably 10 to 25 mm, and the diameter is preferably 5.5 to 7.5 mm.

[0033] (3) Mouthpiece The mouthpiece is a member that constitutes the mouth end. In one embodiment, the mouthpiece 5 includes a first filter 51 and a second filter 52. The first filter 51 may be a filter that is usually used in the field, and may be a solid acetate filter. The second filter 52 includes a wrapper and an adsorbent-containing sheet filled in the wrapper. The length of the second filter 52 is not particularly limited, but may be 5 to 20 mm, and is preferably about 10 to 15 mm.

[0034] 3. Non-combustion heating type flavor inhalation system The combination of the non-combustion heating type flavor inhalation article and the heating unit is also called a non-combustion heating type flavor inhalation system. One embodiment of the system is shown in Figure 2. In the figure, 100 is a non-combustion type flavor inhalation system, 10 is a non-combustion type flavor inhalation device, and 30 is a heating unit equipped with a heater. The heating unit is equipped with a heater, a housing, a power source, etc.

[0035] The heater preferably electrically heats the tobacco member 1. The heater may be either a type that heats the tobacco member 1 from the outer periphery, or a type that is inserted into the tobacco member 1 and heats it from the inside.

[0036] The non-combustion heating type flavor inhalation system may be an IH (Induction Heating) heating system. In this embodiment, the heating unit 30 is composed of an induction coil. The heating unit is usually disposed on the outer periphery of the tobacco member 1. The tobacco member 1 may include a susceptor that is heated by a magnetic field generated by energizing the induction coil. EXAMPLES

[0037] [Examples 1 to 4] A sheet containing pulp, polyester fiber, activated carbon, and a binder was prepared. According to a standard method, the sheet was folded and packed into a wrapper to prepare a second filter. The ridges formed by folding were approximately parallel to the longitudinal direction of the filter. The airflow resistance of the filter was measured using a filter quality measuring device (manufactured by SODIM, name: SODIMAX). Specifically, the sample was covered with air-impermeable rubber to prevent air from entering from the sides, and a rubber sheet was placed 17.5 cm from one end of the sample. 3 The differential pressure (mmH 2 The airflow resistance was measured. Table 1 shows the physical properties of each filter.

[0038] The filter was used to manufacture a non-combustion heating type suction article shown in Figure 1. The structure and size were as follows. Tobacco material / paper core / second filter / first filter = 20 / 20 / 12 / 8 (mm)

[0039] The tobacco member side end of the non-combustion heating type flavor inhalation article was inserted into the heating device shown in FIG. 2. The heater temperature was set to 295° C., and the tobacco member was heated by the heater. A Cambridge filter (CM-133, manufactured by Borgwaldt KC Inc.) and an impinger containing a DNPH (2,4-dinitrophenylhydrazine) solution were placed on the mouth end side of the article, and the article was subjected to a smoking test using a smoking machine. Specifically, the sample was automatically smoked using an automatic smoking machine (LM-1, manufactured by Borgwaldt KC Inc.) under the conditions of a smoking volume of 27.5 ml / sec, a smoking time of 2 sec / puff, a smoking frequency of 2 puffs / min, and 10 puffs.

[0040] Nicotine and glycerin were analyzed by the following method. The Cambridge filter after the smoking test was shaken in 10 mL of methanol (Wako Pure Chemical Industries, Ltd., special grade reagent) to obtain an analysis sample. 1 μL of the obtained analysis sample was collected in a microsyringe and analyzed by gas chromatography mass spectrometry (Agilent GC-MSD, GC: 7890A, MS: 5975C). The results are shown in Table 2.

[0041] Among the carbonyl components, the analysis of formaldehyde, acetaldehyde and acrolein was performed by the following method. After the smoking test, the Cambridge filter was immersed in the impinger collection liquid and shaken, and then the solids were filtered with a membrane filter. Furthermore, a predetermined amount of the filtrate was added to the Trizma base solution and shaken to stop the derivatization reaction. The solution was again filtered through a membrane filter and subjected to HPLC-DAD to analyze the carbonyl components. The method of analyzing the carbonyl components was based on the disclosures of WO2004 / 026054 and CORESTA Recommended Method No. 96 - Determination of Formaldehyde and Acetaldehyde in E-Vapour Product Aerosol February 2021. The results are shown in Table 2. The relationship between Ch / PD and the amount of formaldehyde is shown in Figure 3.

[0042] [Comparative Examples 1 to 2] A center hole filter and a paper filter were prepared. The physical properties of the filters are shown in Table 1. Except for using the center hole filter and the paper filter instead of the second filter 52, non-combustion heating type flavor inhalation articles were prepared in the same manner as in the example, and the particulate matter in the tobacco smoke was quantified. The results are shown in Table 2.

[0043] [Table 1]

[0044] [Table 2]

[0045] It is clear that the filters produced in the examples are effective in removing components that have an undesirable effect on the flavor and aroma of cigarettes, particularly formaldehyde, acetaldehyde, and acrolein, which were difficult to remove with conventional filters. [Explanation of symbols]

[0046] 10. Non-combustion type flavor inhalation products 1 Tobacco parts 3 Cooling material 5 Mouthpiece 51 First Filter 52 Second Filter V Ventilation 100 Non-combustion flavor suction system 30 Heating unit equipped with a heater

Claims

1. A filter for a non-combustion heating type flavor inhalation article, comprising an adsorbent-containing sheet.

2. The amount of adsorbent per unit of air flow resistance (Ch / PD) is 5 to 15 (mg / mmH 2 10. The filter of claim 1, wherein

3. 3. The filter of claim 1 or 2, wherein the adsorbent is activated carbon.

4. The filter according to any one of claims 1 to 3, wherein the sheet is surface-treated.

5. 5. The filter of claim 4, wherein the surface treatment is creping.

6. A non-combustion heating type flavor inhalation article comprising the filter according to any one of claims 1 to 5.

7. providing said sheet; and providing a filter comprising a cylindrical wrapper and the sheet disposed within the wrapper; A method for manufacturing a filter according to any one of claims 1 to 5, comprising:

8. The method of claim 7 further comprising the step of subjecting the sheet to a surface treatment.

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