Flavor composition for aerosol generating article, manufacturing method of filter for aerosol generating article and filter for aerosol generating article

Abstract

According to one aspect, a flavor composition for an aerosol generating article is provided, comprising a flavor agent; and a solvent, wherein the solvent comprises a compound represented by General Formula 1.

Description

Technology Field

[0001] The present invention (Disclosure) relates to a flavor composition for an aerosol generating article, and more specifically, to a flavor composition for an aerosol generating article, a method for manufacturing a filter for an aerosol generating article, a filter for an aerosol generating article, and an aerosol generating article. Background Technology

[0002] Various water-soluble or flavoring agents are used to provide flavoring effects in existing aerosol-generating filters. Medium chain triglyceride (MCTG) is commonly used as a solvent to dissolve these flavoring agents. Prior art literature

[0003] Korean Registered Patent Publication KR10-1691543B1 (Published Jan. 09, 2017) The problem to be solved

[0004] According to one aspect of the present invention, a flavor composition for an eco-friendly aerosol generating article is provided.

[0005] According to another aspect of the present invention, a flavor composition capable of effectively dissolving both water-soluble flavoring agents and fat-soluble flavoring agents is provided.

[0006] According to another aspect of the present invention, a method for manufacturing a filter for an aerosol generating article is provided, which maintains the durability and softness of the filter by interacting with a curing agent during the manufacturing process of the filter.

[0007] According to another aspect of the present invention, a method for manufacturing a filter for an aerosol generating article is provided, which can minimize the loss of components within the filter.

[0008] According to another aspect of the present invention, a filter for an aerosol generating article with improved filter durability is provided.

[0009] According to another aspect of the present invention, a filter for an aerosol generating article is provided that effectively prevents the phenomenon of punctures in the filter cross-section, thereby improving the appearance quality.

[0010] According to another aspect of the present invention, a filter for an aerosol generating article is provided in which a flavoring agent and a curing agent are uniformly distributed throughout the filter.

[0011] According to another aspect of the present invention, an aerosol generating article is provided in which the flavor expression and flavor persistence are improved.

[0012] The objects of the present invention are not limited to those mentioned above, and other unmentioned objects and advantages of the present invention may be understood from the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims. means of solving the problem

[0013] According to one aspect of the present invention, a flavor composition for an aerosol generating article is provided, comprising a flavor agent; and a solvent, wherein the solvent comprises a compound represented by the following general formula 1.

[0014] [General Formula 1]

[0015]

[0016] In the above general formula 1, R1 is a hydrogen atom; or a hydroxyl group; and R2 to R4 are each independently ; or and R 11 Each is independently a straight-chain or branched-chain alkyl group having 1 to 3 carbon atoms, and R 12 Each is independently a straight-chain or branched-chain alkyl group with 1 to 3 carbon atoms.

[0017] According to another aspect of the present invention, a method for manufacturing a filter for an aerosol generating article is provided, comprising the steps of: preparing an open fiber tow; applying a curing agent to the open fiber tow; and spraying a flavor composition for an aerosol generating article of some embodiment onto the fiber tow coated with the curing agent, and then increasing the density of the fiber tow.

[0018] According to another aspect of the present invention, an aerosol generating article filter is provided, manufactured by the method for manufacturing an aerosol generating article filter described above, wherein the hardness calculated according to the following mathematical formula 1 is 93% or higher.

[0019] [Mathematical Formula 1]

[0020] Hardness (%) of filters for aerosol-generating products = [(D f / D i )] X 100

[0021] D in the above mathematical formula 1 i is the initial diameter of the filter for the aerosol generating item, and D f is the diameter of a filter for an aerosol generating product when a force is applied from top to bottom for 15 seconds with a load of 300g.

[0022] The means for solving the above problem do not enumerate all the features of the present invention. Various features of the present invention and the resulting advantages and effects can be understood in more detail by referring to the specific embodiments below. Effects of the invention

[0023] According to one aspect of the present invention, a flavor composition capable of effectively dissolving both water-soluble and fat-soluble flavoring agents in an environmentally friendly manner can be realized.

[0024] According to another aspect of the present invention, a filter for an aerosol generating article and a method for manufacturing the same can be realized, which can maintain the durability and softness of the filter by interacting with a curing agent during the manufacturing process of the filter.

[0025] According to another aspect of the present invention, a filter for an aerosol generating article capable of minimizing the loss of components within the filter and a method for manufacturing the same can be implemented.

[0026] According to another aspect of the present invention, a filter for an aerosol generating article and a method for manufacturing the same can be realized, in which the appearance quality is improved and the flavoring agent and the curing agent are uniformly distributed in the filter.

[0027] According to another aspect of the present invention, an aerosol generating article can be implemented that can further enhance user satisfaction by improving the expression and persistence of flavor.

[0028] In addition to the effects described above, the specific effects of the present invention are described together with the following explanation of the specific details for implementing the invention. Brief explanation of the drawing

[0029] FIG. 1 is a flowchart illustrating a method for manufacturing a filter for an aerosol generating article according to one embodiment of the present invention. FIG. 2 is a schematic diagram showing a manufacturing apparatus for a filter for an aerosol generating article according to one embodiment of the present invention. Figure 3 is a schematic diagram showing the process of increasing the density of the opened fiber tow. FIG. 4 shows an aerosol generating article according to one embodiment of the present invention. FIG. 5 shows an aerosol generating article according to another embodiment of the present invention. Specific details for implementing the invention

[0030] In this specification, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0031] In this specification, a range of numerical values ​​indicated by the term 'to' represents a range of numerical values ​​that includes the values ​​listed before and after the term as the lower limit and upper limit, respectively. Furthermore, in this specification, if multiple numerical values ​​are disclosed as the upper limit and lower limit of any numerical range, the range of numerical values ​​disclosed in this specification may be understood as a range of any numerical values ​​in which any one of the multiple lower limit values ​​and any one of the multiple upper limit values ​​are respectively the lower limit and upper limit values. For example, if 'a or greater,' or 'b or greater; and c or less,' or 'd or less' is described, it may be understood as 'a or greater and c or less,' 'a or greater and d or less,' 'b or greater and c or less,' or 'b or greater and d or less.'

[0032] According to one aspect of the present invention, a flavor composition for an aerosol generating article is provided, comprising a flavor agent; and a solvent, wherein the solvent comprises a compound represented by the following general formula 1.

[0033] [General Formula 1]

[0034]

[0035] In the above General Formula 1: R1 is a hydrogen atom; or a hydroxyl group; and R2 to R4 are each independently ; or and R 11 Each is independently a straight-chain or branched-chain alkyl group having 1 to 3 carbon atoms, and R 12 Each is independently a straight-chain or branched-chain alkyl group with 1 to 3 carbon atoms.

[0036] According to one aspect of the present invention, by using a compound represented by General Formula 1 as a solvent for dissolving the flavor agent, both water-soluble and fat-soluble flavor agents can be effectively dissolved in an environmentally friendly manner. According to another aspect of the present invention, by using a compound represented by General Formula 1 as a solvent, it interacts with a curing agent in the manufacturing process of the filter described below to maintain the durability and softness of the filter, while minimizing the loss of components (e.g., flavor agents) within the filter.

[0037] The configuration of the present invention will be described in more detail below.

[0038] 1. Flavor composition for aerosol-generating products

[0039] In this specification, "flavor composition for aerosol generating articles" is defined as a composition comprising a flavor agent included in some of the components of an aerosol generating article.

[0040] The flavor composition for an aerosol generating article according to the present invention includes a flavorant to provide consumers with various tastes and aromas.

[0041] In this specification, "water-soluble flavoring agent" is defined as a flavoring agent having high solubility in a water-soluble solvent, wherein the solubility in water is 10 g / 100g or more, 20 g / 100g or more, 30 g / 100g or more, 40 g / 100g or more, 50 g / 100g or more, 60 g / 100g or more, 70 g / 100g or more, 80 g / 100g or more, 90 g / 100g or more, or 95 g / 100g or more at 25°C. For example, the solubility of the water-soluble flavoring agent can be analyzed by removing the solute (water-soluble flavoring agent) that is not dissolved in the saturated solution (Solution) in which the water-soluble flavoring agent is dissolved in water, and then measuring the mass of the solute (water-soluble flavoring agent) dissolved in the saturated solution.

[0042] In this specification, "fat-soluble flavoring agent" is defined as a flavoring agent with high solubility in a fat-soluble solvent, wherein the solubility in water is less than 10 g / 100g, 7 g / 100g or less, 5 g / 100g or less, 3 g / 100g or less, 1 g / 100g or less, or 0.1 g / 100g or less at 25°C. For example, the solubility of the fat-soluble flavoring agent can be analyzed by removing the solute (fat-soluble flavoring agent) that is not dissolved in the saturated solution (Solution) in which the fat-soluble flavoring agent is dissolved in water, and then measuring the mass of the solute (fat-soluble flavoring agent) dissolved in the saturated solution.

[0043] In some non-limiting examples, the flavor agent may be any one selected from the group consisting of water-soluble flavor agents, fat-soluble flavor agents, and mixtures thereof, and specifically may be a mixture of water-soluble flavor agents and fat-soluble flavor agents.

[0044] In some non-limiting examples, the above water-soluble flavoring agent may include one or more selected from the group consisting of fruit, herb extract, spice extract, sucrose, fructose syrup, isosweet, licorice, honey, coffee, tea, vanillin, and ethyl vanillin.

[0045] In some non-limiting examples, the above-mentioned fat-soluble flavoring agent may include one or more selected from the group consisting of cream, menthol, mint, peppermint, spearmint, wintergreen, nutmeg, clove, cardamom, anise, sage, sandalwood, cascarilla, cinnamon, caraway, cocoa, lavender, celery, fenugreek, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oil, cinnamon oil, cognac, ylang-ylang, and sage.

[0046] In some non-limiting examples, the weight ratio of the water-soluble flavoring agent to the fat-soluble flavoring agent may be 1:9 or higher and 9:1 or lower.

[0047] In some non-limiting examples, the form of the flavoring agent may be liquid or solid.

[0048] In some examples, when the flavor agent is in a solid state, the flavor agent may be in the form of a capsule. In some non-limiting examples, the flavor agent in the form of a capsule may be spherical, elliptical, or cylindrical.

[0049] In some embodiments of the present invention, the content of the flavoring agent may be 30 parts by weight or more and 50 parts by weight or less per 100 parts by weight of the flavoring composition for the aerosol generating article. Specifically, the content of the flavoring agent per 100 parts by weight of the flavoring composition for the aerosol generating article may be 30 parts by weight or more, 35 parts by weight or more, 40 parts by weight or more, or 42.7 parts by weight or more; and 45 parts by weight or less, 47 parts by weight or less, 49 parts by weight or less, or 50 parts by weight or less. In some embodiments of the present invention, by controlling the content of the flavoring agent to the above numerical range, the flavoring agent can be effectively dissolved in a solvent represented by General Formula 1 described below, while simultaneously ensuring sufficient persistence and expression of the scent.

[0050] The solvent according to the present invention can perform a dissolving action that dissolves some or all of the aforementioned flavoring agent. Furthermore, the solvent according to the present invention is not limited to merely dissolving the flavoring agent; it may also serve as a factor that, together with the curing agent described later in the filter manufacturing process, increases the hardness of the filter for aerosol-generating articles while simultaneously maintaining the softness of the filter. In another aspect, the solvent according to the present invention can effectively maintain the expression of the aroma and the persistence of the flavor.

[0051] The solvent according to the present invention comprises a compound represented by the following general formula 1.

[0052] [General Formula 1]

[0053]

[0054] In the above general formula 1, R1 is a hydrogen atom; or a hydroxyl group; and R2 to R4 are each independently ; or and R 11 Each is independently a straight-chain or branched-chain alkyl group having 1 to 3 carbon atoms, and R 12 Each is independently a straight-chain or branched-chain alkyl group having 1 to 3 carbon atoms. The solvent according to the present invention includes a compound represented by General Formula 1, thereby effectively dissolving both fat-soluble flavoring agents and water-soluble flavoring agents, which can maintain the expression and persistence of the flavor. In addition, the solvent, together with a curing agent to be described later, can increase the hardness of a filter for an aerosol generating article while maintaining the softness of the filter.

[0055] In some embodiments of the present invention, the compound represented by the above general formula 1 may include a compound represented by the following general formula 1-1.

[0056] [General Formula 1-1]

[0057]

[0058] In the above general formula 1-1, R1 is a hydroxyl group, and R 21 to R 23 Each is independently a straight-chain or branched-chain alkyl group having 1 to 3 carbon atoms. In some embodiments of the present invention, the compound represented by General Formula 1-1 is included in the compound represented by General Formula 1, thereby effectively dissolving both fat-soluble and water-soluble flavoring agents, thereby maintaining the expression and persistence of the flavor. In addition, through the compound represented by General Formula 1-1, the hardness of the filter for an aerosol generating article can be increased together with the curing agent described later, while the softness of the filter can be maintained.

[0059] In some non-limiting examples, the straight-chain or branched-chain alkyl group having 1 to 3 carbon atoms of the above general formula 1-1 may be a methyl group, an ethyl group, an n-propyl group, or an isopropyl group, and specifically may be an ethyl group.

[0060] In some embodiments of the present invention, the compound represented by the above general formula 1 may include a compound represented by the following general formula 1-2.

[0061] [General Formula 1-2]

[0062]

[0063] R in the above general formula 1-2 31 to R 33 Each is independently a straight-chain or branched-chain alkyl group having 1 to 3 carbon atoms. In some embodiments of the present invention, the compound represented by General Formula 1-2 is included in the compound represented by General Formula 1, thereby effectively dissolving both fat-soluble and water-soluble flavoring agents, thereby maintaining the expression and persistence of the flavor. In addition, through the compound represented by General Formula 1-2, the hardness of the filter for an aerosol generating article can be increased together with the curing agent described later, while the softness of the filter can be maintained.

[0064] In some non-limiting examples, the straight-chain or branched-chain alkyl group having 1 to 3 carbon atoms of the above general formula 1-2 may be a methyl group, an ethyl group, an n-propyl group, or an isopropyl group, and specifically may be a methyl group.

[0065] In some embodiments of the present invention, the solvent may include a compound represented by General Formula 1-1 and a compound represented by General Formula 1-2. In some embodiments of the present invention, by including the compound represented by General Formula 1-1 and the compound represented by General Formula 1-2 in the solvent, both fat-soluble flavoring agents and water-soluble flavoring agents can be effectively dissolved, thereby maintaining the expression and persistence of the flavor. In addition, through a combination of compounds represented by General Formulas 1-1 and 1-2, the hardness of the filter for an aerosol generating article can be increased together with the curing agent described later, while the softness of the filter can be maintained.

[0066] In some non-limiting examples, the weight ratio of the compound represented by General Formula 1-1 and the compound represented by General Formula 1-2 may be 1:9 or greater and 9:1 or less. Specifically, the weight ratio of the compound represented by General Formula 1-1 and the compound represented by General Formula 1-2 may be 1:9 or greater, 2:8 or greater, 3:7 or greater, 4:6 or greater, 5:5 or greater, 6:4 or greater, 7:3 or greater, or 8:2 or greater; 2:8 or less, 3:7 or less, 4:6 or less, 5:5 or less, 6:4 or less, 7:3 or less, 8:2 or less, or 9:1 or less; or any one of the plurality of lower limits or any one of the plurality of upper limits or less.

[0067] In some embodiments of the present invention, the solvent may include any one selected from the group consisting of triacetin (TA), triethyl citrate (TEC), and combinations thereof, and specifically may include triacetin or triethyl citrate. In some embodiments of the present invention, by using triacetin or triethyl citrate as the solvent, both fat-soluble flavoring agents and water-soluble flavoring agents can be effectively dissolved, thereby maintaining the expression and persistence of the flavor. In addition, through the triacetin or triethyl citrate, the hardness of the filter for an aerosol generating article can be increased together with the curing agent while maintaining the softness of the filter.

[0068] In some embodiments of the present invention, the content of the solvent may be 50 parts by weight or more and 70 parts by weight or less per 100 parts by weight of the flavor composition for the aerosol generating article. Specifically, the content of the solvent per 100 parts by weight of the flavor composition for the aerosol generating article may be 50 parts by weight or more, 52 parts by weight or more, 54 parts by weight or more, 56 parts by weight or more, or 57.3 parts by weight or more; and 60 parts by weight or less, 62 parts by weight or less, 64 parts by weight or less, 66 parts by weight or less, 68 parts by weight or less, or 70 parts by weight or less. In some embodiments of the present invention, by controlling the content of the flavor agent to the above numerical range, the flavor agent can be effectively dissolved in the solvent described below, and at the same time, sufficient persistence and expression of the scent can be realized. In another aspect, by controlling the content of the solvent to the above numerical range, an appropriate viscosity of the flavor composition is achieved, so that the flavor composition can be effectively sprayed without clogging of the nozzle provided at the front of the transport jet to be described later.

[0069] 2. Method for manufacturing a filter for an aerosol generating product

[0070] In this specification, "fiber tow" is defined as an assembly of multiple filaments. In some examples, the fiber tow may be manufactured by a tow process common in the art.

[0071] In this specification, "opening" is defined as a process of unraveling the fiber tow using the speed difference between the front and rear rolls. In some examples, an opening machine commercially available in the art may be used for the opening process.

[0072] In this specification, the term "curing agent" refers to a substance that can control the hardness and softness of a filter by slightly melting the surface of the opened fiber tow to form bonds between the fibers. Alternatively, in the art, the curing agent may be referred to as a plasticizer.

[0073] Conventionally, a method was used in which a flavor composition for aerosol generating products containing MCTG was sprayed onto high-density fiber tow. However, this method caused problems such as the fiber tow melting, creating holes in the filter's cross-section, and the curing agent clumping, resulting in a deterioration of the filter's appearance quality.

[0074] According to another aspect of the present invention, a method for manufacturing a filter for an aerosol generating article is provided, comprising the steps of: preparing an open fiber tow; applying a curing agent to the open fiber tow; and spraying a flavor composition for an aerosol generating article of some embodiment onto the fiber tow coated with the curing agent, and then increasing the density of the fiber tow. Specifically, the fiber tow coated with the curing agent may be an open fiber tow. Accordingly, the flavor composition for an aerosol generating article may be sprayed onto the open fiber tow (in a state before the density is increased).

[0075] According to another aspect of the present invention, by spraying the flavor composition for an aerosol generating article onto a fiber tow (open fiber tow) coated with the curing agent, the melting phenomenon of the fiber tow can be effectively prevented and the effect of uniformly distributing the flavor agent and the curing agent can be achieved. In yet another aspect, by spraying the flavor composition for an aerosol generating article onto a fiber tow (open fiber tow) coated with the curing agent, the formation of holes in the cross-section of the filter can be prevented, thereby improving the appearance quality of the filter.

[0076] In this specification, expressions such as "(S1)", "(S2)", etc. may modify various components regardless of order and / or importance and do not limit such components. These expressions may be used to distinguish one component from another.

[0077] The configuration of the present invention will be described in detail below with reference to FIGS. 1 and 2.

[0078] FIG. 1 is a flowchart illustrating a method for manufacturing a filter for an aerosol generating article according to one embodiment of the present invention.

[0079] Referring to FIG. 1, a method for manufacturing a filter for an aerosol generating article according to the present invention may include: a step of preparing an open fiber tow (S1); a step of applying a curing agent to the open fiber tow (S2); a step of increasing the density of the fiber tow after spraying a flavor composition for an aerosol generating article of some embodiment onto the fiber tow coated with the curing agent using a transport jet (S3); and a step of manufacturing a filter for an aerosol generating article by wrapping the fiber tow with increased density with a filter paper (S4).

[0080] FIG. 2 is a schematic diagram showing a manufacturing apparatus for a filter for an aerosol generating article according to one embodiment of the present invention.

[0081] Referring to FIG. 2, the manufacturing apparatus for a filter according to the present invention may include a tow storage tank (10), a transfer roller (21, 22, 23), a curing agent injector (30), a transport jet (40), a plug hoist (50), and a cutter (60).

[0082] Referring to FIGS. 1 and 2, the tow storage tank (10) according to the present invention may be a device for storing fiber tow produced by a tow process. In some examples, the preparation step of the opened fiber tow of step (S1) may be performed through the tow storage tank (10).

[0083] The conveying rollers (21, 22, 23) according to the present invention can contribute to maintaining a constant spacing between each fiber constituting the fiber tow during conveying by adjusting the conveying speed of the fiber tow (1a) provided from the tow storage tank (10). In some non-limiting examples, the conveying rollers (21, 22, 23) can convey the fiber tow (1a) in one direction by rotating in opposite directions. In some non-limiting examples, the conveying rollers (21, 22, 23) may be formed of a rubber material.

[0084] The curing agent injector (30) according to the present invention can inject the curing agent described above onto the surface of the opened fiber tow. Specifically, the curing agent injector (30) may be a device that controls the hardness and softness of the filter by slightly melting the surface of the opened fiber tow to form bonds between the fibers. In some examples, the step (S2) described above may be performed through the curing agent injector (30).

[0085] In some embodiments of the present invention, the curing agent may include one or more selected from the group consisting of triacetin (TA), triethyl citrate (TEC), and polyethylene glycol, specifically, it may include any one selected from the group consisting of triacetin (TA), triethyl citrate (TEC), and combinations thereof, and more specifically, it may include triacetin or triethyl citrate. In some embodiments of the present invention, by using triacetin or triethyl citrate as the curing agent, the durability and softness of the filter can be maintained through interaction with the solvent described above, while at the same time minimizing the loss of components (e.g., flavoring agents, etc.) within the filter.

[0086] In some non-limiting examples, a method of injecting the curing agent using a brush; a method of injecting the curing agent by the rotational force of a rotating device; and any one method selected from the group consisting of combinations thereof may be used.

[0087] Figure 3 is a schematic diagram showing the process of increasing the density of the opened fiber tow.

[0088] Referring to FIG. 3, the term "fiber tow with increased density" in this specification is defined as fiber tow in which the average fiber spacing between fiber tows is narrowed through a transport jet. For example, the density of the fiber tow (1b) discharged through the rear end (outlet) of the transport jet (40) can be increased compared to the fiber tow (1a) that is opened and introduced into the front end (inlet) of the transport jet (40).

[0089] The transport jet (40) according to the present invention can spray a flavor composition onto a fiber tow coated with a curing agent through a curing agent injector (30), and at the same time increase the density of the fiber tow onto which the flavor composition is sprayed. Specifically, the flavor composition may be a flavor composition of some of the embodiments described above.

[0090] In some examples, a dense fiber tow (1b) can be obtained through the outlet of the transport jet (40). Additionally, the above-described step (S3) can be performed through the transport jet (40).

[0091] In some embodiments of the present invention, the content of the solvent may be higher than the content of the curing agent based on the total weight of the high-density fiber tow. In some embodiments of the present invention, the loss of the curing agent can be minimized by controlling the content of the solvent to be higher than the content of the curing agent. Accordingly, the durability of the filter can be effectively maintained.

[0092] In some embodiments of the present invention, the total sum of the solvent content and the curing agent content based on the total weight of the high-density fiber tow may be 9% by weight or more and 13% by weight or less. Specifically, based on the total weight of the high-density fiber tow, the total sum of the solvent content and the curing agent content may be 9% by weight or more, 10% by weight or more, or 11% by weight or more; and 12% by weight or less, or 13% by weight or less. In some embodiments of the present invention, by controlling the total sum of the solvent content and the curing agent content to the above numerical range, the loss of components (e.g., flavoring agents) within the filter can be minimized while maintaining the durability and softness of the filter. Accordingly, the expression and persistence of the fragrance can be further improved.

[0093] In some examples, based on the total weight of the fiber tow with increased density, the content of the solvent may be 5% by weight or more and 7% by weight or less, and the content of the curing agent may be 4% by weight or more and 6% by weight or less.

[0094] In some non-limiting examples, one or more nozzles provided at the front of the transport jet (40) may be used to spray the flavor composition onto the fiber tow coated with the curing agent. Here, a pressure-based spray method may be used to spray the flavor composition through the nozzles.

[0095] In some non-limiting examples, the pressure for spraying the flavor composition may be 0.5 MPa or more and 2 MPa or less.

[0096] In some non-limiting examples, the number of the above nozzles may be one or more, two or more, or three or more.

[0097] In some embodiments of the present invention, the loss rate of the flavor agent calculated according to Formula 1 below may be 22% or less, 20% or less, 19% or less, 17% or less, 16% or less, 15% or less, 10% or less, 8% or less, 7% or less, 6% or less, 5% or less, or 4% or less, and specifically may be greater than 0% and less than or equal to any one of the plurality of lower limits above. In some embodiments of the present invention, the persistence and expression of the flavor agent may be further enhanced by controlling the loss rate of the flavor agent calculated according to Formula 1 below to the above numerical range.

[0098] [Equation 1]

[0099] Loss rate of flavoring agent (%)=[(F i -F f ) / F i ] X 100

[0100] In the above Equation 1, F i is the initial weight (input weight) of the flavor agent included in the flavor composition for aerosol generating articles, and F fis the weight of the flavoring agent contained in the dense fiber tow.

[0101] The plug hoist (50) according to the present invention may be a device that forms a dense fiber tow (1b) into a rod shape through a transport jet (40). Specifically, the plug hoist (50) may manufacture a filter for an aerosol generating article by connecting the molded body formed from the dense fiber tow into a rod shape to a filter winding sheet coated with adhesive. In some non-limiting examples, the adhesive applied to the filter winding sheet may be a hot melt adhesive or an ethylene vinyl acetate adhesive.

[0102] In some other embodiments of the present invention, the method for manufacturing a filter for an aerosol generating article may further include the step (S4) of manufacturing a filter for an aerosol generating article by wrapping the high-density fiber tow with a filter winding. Specifically, the step (S4) of manufacturing a filter for an aerosol generating article by wrapping the high-density fiber tow with a filter winding through the plug winder (50) may be performed.

[0103] In some non-limiting examples, the thickness of the filter paper may be 50 μm or more and 300 μm or less.

[0104] In some non-limiting examples, the basis weight of the above filter paper is 50 g / m² 2 100 g / m² or more 2 It may be less than.

[0105] The cutter (60) according to the present invention may be a device for cutting a filter for an aerosol generating product provided through a plug hoist (50) to a specific length. Specifically, the cutter (60) may be connected to the plug hoist (50), and specifically, may be directly connected.

[0106] 3. Filters for aerosol-generating items

[0107] According to another aspect of the present invention, an aerosol generating article filter is provided, manufactured by a method for manufacturing an aerosol generating article filter of some embodiments, wherein the hardness calculated according to the following mathematical formula 1 is 93% or higher.

[0108] [Mathematical Formula 1]

[0109] Hardness (%) of filters for aerosol-generating products = [(D f / D i )] X 100

[0110] D in the above mathematical formula 1 i is the initial diameter of the filter for the aerosol generating item, and D f is the diameter of a filter for an aerosol generating article to which a force of 300g is applied from top to bottom for 15 seconds. Here, to apply the force from top to bottom, a measuring device may be used that can apply a load of 300g to the fixed filter for an aerosol generating article in a top-to-bottom direction after placing and fixing a rod-shaped filter for an aerosol generating article on one surface of a substrate.

[0111] According to another aspect of the present invention, the loss of components within the filter can be minimized by manufacturing the filter using a method for manufacturing a filter for an aerosol generating article according to some embodiments. Accordingly, the solvent dissolving the curing agent and the flavor composition is uniformly distributed in the filter, thereby increasing the persistence and expression of the flavor agent while simultaneously improving the mechanical durability of the filter.

[0112] 4. Aerosol-generating items

[0113] According to another aspect of the present invention, an aerosol generating article comprising a filter for an aerosol generating article of some embodiment may be provided.

[0114] FIG. 4 shows an aerosol generating article according to one embodiment of the present invention.

[0115] Referring to FIG. 4, an aerosol generating article (100) according to one embodiment of the present invention includes a filter section (110) and a medium section (120). Specifically, the filter section (110) and the medium section (120) may be arranged continuously along the longitudinal direction, and more specifically, the medium section (120) may be located upstream and the filter section (110) may be located downstream.

[0116] The filter unit (110) according to the present invention can filter smoke and / or aerosol generated in the medium unit (120).

[0117] In some embodiments of the present invention, the filter portion (110) may include a filter for an aerosol generating article according to some embodiments described above. According to some embodiments of the present invention, by including the filter for an aerosol generating article described above in the filter portion, the expression and persistence of flavor can be improved, thereby further increasing user satisfaction.

[0118] The medium portion (120) according to the present invention may be disposed on one side of the filter portion (110). Specifically, the medium portion (120) may include a medium that generates smoke and / or aerosol as it burns.

[0119] In this specification, the term "medium" is not particularly limited and may be any material commonly used in the art that can generate smoke and / or aerosol. Specifically, the medium may include tobacco raw materials such as tobacco leaf pieces, tobacco stems, etc., and materials processed therefrom. As a more specific example, the medium may include crushed tobacco leaves, puffed main veins, tobacco cut leaves (e.g., leaf tobacco cut leaves, plate leaf cut leaves), tobacco sheets (e.g., plate leaves), etc.

[0120] In some non-limiting examples, the medium may further include one or more additives among humectants and flavoring agents. For example, the humectant may maintain the moisture in the medium at an appropriate level to soften the characteristic taste and increase the vapor production. Specifically, the humectant may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. For example, the flavoring agent may be added to enhance the flavor. Specifically, the above flavoring agent may include licorice, sucrose, fructose syrup, isosweet, cocoa, lavender, cinnamon, cardamom, celery, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oil, caraway, cognac, jasmine, chamomile, menthol, ylang-ylang, sage, spearmint, ginger, coriander, clove extract, or coffee, etc.

[0121] FIG. 5 shows an aerosol generating article according to another embodiment of the present invention.

[0122] Referring to FIG. 5, the aerosol generating article (100) according to the present invention comprises first to fourth parts (SEG1, SEG2, SEG3, SEG4). Specifically, the first to fourth parts (SEG1, SEG2, SEG3, SEG4) may be arranged side by side in the longitudinal direction (L) of the aerosol generating article (100). More specifically, the second part (SEG2) may be interposed between the first part (SEG1) and the third part (SEG3), and the third part (SEG3) may be interposed between the second part (SEG2) and the fourth part (SEG4). For example, the thickness direction (T) may be a direction that intersects the longitudinal direction (L) of the aerosol generating article (100).

[0123] In one embodiment of the present invention, the first part (SEG1) can function as a medium in an internally heated aerosol generating article. Specifically, the first part (SEG1) is heated by a needle (internal heating element) provided in an aerosol generating device, so that the aerosol can be transferred in the longitudinal direction (L). In the internally heated aerosol generating article described above, the second part (SEG2) may include a hollow filter that filters the aerosol transferred from the first part (SEG1), the third part (SEG3) may include a cooling filter (e.g., a paper tube) that cools the transferred aerosol, and the fourth part (SEG4) may include a filter that holds fragrance and performs a support function. The filter for the aerosol generating article of some of the embodiments described above may be included in the fourth part (SEG4). The fourth part (SEG4) includes a filter for an aerosol generating article of some embodiment, thereby improving the expression and persistence of flavor and further enhancing user satisfaction.

[0124] In another embodiment of the present invention, the first part (SEG1) can perform a filter function in an externally heated aerosol generating article. Unlike an internally heated aerosol generating article in which a heating element is set to be inserted into the interior of the first part, the heating element of the externally heated aerosol generating article may be disposed on the outer surface of at least one of the first part and the second part to heat the outer surface. In this case, the first part (SEG1) can perform the function of filtering aerosol supplied from an external vaporizer (cartridge), which is a device separate from the aerosol generating article. In the externally heated aerosol generating article described above, the second part (SEG2) can perform a function as a medium part. The third part (SEG3) may include a hollow filter, and the fourth part (SEG4) may include a filter for the aerosol generating article described above. The fourth part (SEG4) includes a filter for an aerosol generating article of some embodiment, thereby improving the expression and persistence of flavor and further enhancing user satisfaction.

[0125] According to another embodiment of the present invention, in an externally heated aerosol generating article, the first part (SEG1) may include a filter element impregnated with an aerosol-forming substance. Unlike the embodiment described in the preceding paragraph, the aerosol-forming substance is impregnated into the filter element, so that the first part (SEG1) can be heated without an external vaporizer, thereby allowing the aerosol to be formed and transferred. In some non-limiting examples, the filter element may include a hollow formed elongated along the longitudinal direction of the aerosol generating article (100). Here, the hollow may penetrate the filter element. Here, the cross-sectional shape of the hollow is not particularly limited and may specifically be Y-shaped, X-shaped, or circular. The fourth part (SEG4) may include the above-described filter for the aerosol generating article. By including the filter for the aerosol generating article of some embodiment, the expression and persistence of flavor may be improved, thereby further enhancing user satisfaction.

[0126] In this specification, terms such as “about” or “substantially” refer to a reasonable amount of variation of a term modified so as not to significantly alter the final result. Such terms may be interpreted to include a variation of at least ±5% or at least ±10% to the extent that the variation does not alter or invalidate the meaning of the word.

[0127] Hereinafter, embodiments of the present invention are described in detail so that those skilled in the art can easily implement the present invention; however, this is merely an example, and the scope of the present invention is not limited by the following.

[0128] [Preparation Example 1: Preparation of Flavor Composition]

[0129] A flavor composition having the composition and content according to Table 1 below was prepared. In this case, the content of each composition in Table 1 below is a content set based on the total weight of the flavor composition.

[0130] division Comparative Example 1 Example 1 Example 2 Water-soluble flavoring agent (content) Fruit flavor (42.7% by weight) Fruit flavor (42.7% by weight) Fruit flavor (42.7% by weight) Solvent (content) MCTG a) (57.3 wt%) Triacetin (57.3 wt%) Triethyl citrate (57.3 wt%) a) MCTG (Medium chain fatty acid triglyceride). Here, MCTG contains two caprylate moiety and one caproate moiety.

[0131] [Manufacturing Example 2: Manufacture of a filter for an aerosol generating article]

[0132] <Comparative Example 1: Method of spraying a flavor composition onto a high-density fiber tow>

[0133] Preparation stage of opened fiber tow:

[0134] Cellulose acetate with an acetyl substitution degree of 2.5 was dissolved in acetone, heated to 50°C, filtered, and then extruded from a die to perform dry spinning by evaporating the acetone using the latent heat of the dope and the sensible heat of the hot air. Cellulose acetate filaments were produced through the dry spinning above, and several cellulose acetate filaments were bundled into a rope to prepare an open fiber tow made of cellulose acetate material.

[0135] Step of applying a hardener to the above-mentioned opened fiber tow:

[0136] A curing agent was applied to the above-mentioned fiber tow using the acid-forming method as described in Table 2 below. A brush was used for the acid-forming method.

[0137] Step to increase the density of fiber tow:

[0138] The density of the fiber tow coated with the above-mentioned curing agent was increased using a transport jet.

[0139] Spraying step of the flavor composition:

[0140] The flavor composition of Comparative Example 1 was sprayed onto the fiber tow with increased density using a free-fall method. At this time, the nozzle device for spraying the flavor composition was provided at the rear end of the transport jet.

[0141] Filter manufacturing steps:

[0142] The fiber tow sprayed with the above flavor composition is filtered onto filter paper (thickness: 100㎛, basis weight: 75 g / m² 2 A rod-shaped filter for aerosol generating products (diameter 3.5 mm, length 84 mm) was finally manufactured by wrapping it with ).

[0143] <Examples 1 and 2: Method of spraying a flavor composition onto an opened fiber tow>

[0144] Preparation stage of opened fiber tow:

[0145] Cellulose acetate with an acetyl substitution degree of 2.5 was dissolved in acetone, heated to 50°C, filtered, and then extruded from a die to perform dry spinning by evaporating the acetone using the latent heat of the dope and the sensible heat of the hot air. Cellulose acetate filaments were produced through the dry spinning above, and several cellulose acetate filaments were bundled into a rope to prepare an open fiber tow made of cellulose acetate material.

[0146] Step of applying a hardener to the above-mentioned opened fiber tow:

[0147] A curing agent was applied to the above-mentioned fiber tow using the acid-forming method as described in Table 2 below. A brush was used for the acid-forming method.

[0148] Step of spraying a flavor composition onto the fiber tow coated with the above-mentioned curing agent:

[0149] After spraying the flavor compositions of Example 1 or 2 onto the fiber tow (in an opened state) coated with the curing agent through three nozzles provided at the front of the transport jet device, the density of the fiber tow was increased. At this time, the three nozzles were operated using a pressure-based spray method. Here, the air supply pressure for spraying each flavor composition was adjusted to 0.01 MPa, the spray shape to be elliptical, the spray height to 2.5 cm, the spray distance to 11 cm, and the width of the fiber tow to 4 cm.

[0150] Filter manufacturing steps:

[0151] The above-mentioned high-density fiber tow is filter paper (thickness: 100㎛, basis weight: 75 g / m² 2 A filter for aerosol generating products (diameter 3.5 mm, length 84 mm) was finally manufactured by wrapping it with ).

[0152] [Experimental Example: Performance Evaluation of Filters for Aerosol-Generating Products]

[0153] Measurement of filter hardness:

[0154] Using a filter hardness measuring device (contact type filter physical property measuring instrument) from Cardian, a force of 300g was applied from top to bottom for 15 seconds to a filter specimen for aerosol generating products (diameter 3.5mm, length 84mm), and then the diameter of the filter specimen to which the force was applied was measured. Subsequently, the hardness of the filter specimen was indirectly evaluated by calculating the rate of change in the diameter of the filter specimen according to the following Equation 1.

[0155] [Mathematical Formula 1]

[0156] Hardness (%) of filters for aerosol-generating products = [(D f / D i )] X 100

[0157] In the above mathematical formula 1, D i is the initial diameter of the filter for the aerosol generating item, and D f is the diameter of a filter for an aerosol generating product when a force is applied from top to bottom for 15 seconds with a load of 300g.

[0158] Calculation of Flavor Loss Rate:

[0159] [Equation 1]

[0160] Loss rate of flavoring agent (%) = [F i -F f / F i ] X 100

[0161] In the above Equation 1, F i is the initial weight (input weight) of the flavor agent included in the flavor composition for aerosol generating articles, and F f is the weight of the flavor agent contained in the denser fiber tow. The content of the flavor agent contained in the denser fiber tow was calculated by measuring a solution of a water-soluble flavor agent dissolved in a solvent (water) using liquid chromatography-mass spectrometry (column: C18 column, mobile phase solvent: aqueous methanol solution).

[0162] Observation of the filter's cross-section:

[0163] The distribution of flavoring agents and curing agents was observed visually by observing the vertical cross-section of a filter specimen (diameter 3.5 mm, length 84 mm) for aerosol generating products.

[0164] Observation of the filter holes:

[0165] By observing the vertical cross-section of a filter specimen (diameter 3.5 mm, length 84 mm) for aerosol generating products, we visually observed whether holes were formed inside the filter.

[0166] division Comparative Example 1 Example 1 Example 2 Fiber tow at the time of flavor composition spraying Warped tow (high-density fiber tow) opened earthenware opened earthenware Nozzle position Provided at the rear end of the transport jet Provided at the front of the transport jet Provided at the front of the transport device Flavor composition spraying method free fall Pressure-based spray Pressure-based spray Total content of flavoring agents and hardening agents (weight%) a) 11 wt% 11 wt% 11 wt% Curing agent content (type) 5.13 wt% (triacetin) 5.13 wt% (triacetin) 5.13 wt% (triethyl citrate) Solvent content (type) 5.87 wt% (MCTG) 5.87 wt% (triacetin) 5.87 wt% (triethyl citrate) Filter hardness (%) 92% 94.0% 94.0% Loss rate of flavoring agents (%) 30% 4% 5% Uniform distribution of flavoring agents and hardening agents Concentration in the central area evenly distributed evenly distributed Observation of filter holes Hole observed No holes observed No holes observed a) Content of increased-density fiber tow relative to the total weight

[0167] Comparing Comparative Example 1 with Examples 1 and 2 in Table 2 above, it was confirmed that by (i) using triacetin or triethyl citrate instead of MCTG as a solvent to dissolve the flavor agent, and (ii) spraying the flavor composition onto an open tow, the hardness of the filter was further increased, the loss rate of the flavor agent was significantly reduced, the distribution of the flavor agent and the hardening agent became uniform, and no holes were observed in the cross-section of the filter. Specifically, it was confirmed that in Examples 1 and 2, the loss rate of the flavor agent was significantly reduced to about 5% or less.

[0168] Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also included within the scope of the present invention. Explanation of the symbols

[0169] 10: Clay pot storage tank 1a: Open fiber tow 1b: High-density fiber tow 21, 22, 23: Transfer rollers 30: Curing agent dispenser 40: Transport Jet 50: Plug hoist 60: Cutter 100: Aerosol generating items 110: Filter section 120: Medium part SEG1: Part 1 SEG2: Part 2 SEG3: Part 3 SEG4: Part 4

Claims

Claim 1 A flavor composition for an aerosol generating article comprising: a flavor agent; and a solvent; wherein the solvent comprises a compound represented by the following general formula 1: [General Formula 1] In the above general formula 1: R1 is a hydrogen atom; or a hydroxyl group; and R2 to R4 are each independently ; or and R 11 Each is independently a straight-chain or branched-chain alkyl group having 1 to 3 carbon atoms, and R 12 Each is independently a straight-chain or branched-chain alkyl group with 1 to 3 carbon atoms. Claim 2 In claim 1, the compound represented by General Formula 1 comprises a compound represented by the following General Formula 1-1, a flavor composition for an aerosol generating article: [General Formula 1-1] In the above general formula 1-1: R1 is a hydroxyl group, and R 21 to R 23 Each is independently a straight-chain or branched-chain alkyl group with 1 to 3 carbon atoms. Claim 3 In claim 1, the compound represented by General Formula 1 comprises a compound represented by the following General Formula 1-2, a flavor composition for an aerosol generating article: [General Formula 1-2] In the above general formula 1-2: R 31 to R 33 Each is independently a straight-chain or branched-chain alkyl group with 1 to 3 carbon atoms. Claim 4 A flavor composition for an aerosol generating article according to claim 1, wherein the solvent comprises any one selected from the group consisting of triacetin (TA), triethyl citrate (TEC), and combinations thereof. Claim 5 A method for manufacturing a filter for an aerosol generating article, comprising: a step of preparing an open fiber tow; a step of applying a curing agent to the open fiber tow; and a step of increasing the density of the fiber tow after spraying a flavor composition for an aerosol generating article according to any one of claims 1 to 4 onto the fiber tow coated with the curing agent. Claim 6 A method for manufacturing a filter for an aerosol generating article, wherein the curing agent in claim 5 comprises one or more selected from the group consisting of triacetin (TA), triethyl citrate (TEC), and polyethylene glycol. Claim 7 A method for manufacturing a filter for an aerosol generating article, wherein, in paragraph 5, based on the total weight of the fiber tow with increased density: the content of the solvent is higher than the content of the curing agent. Claim 8 A method for manufacturing a filter for an aerosol generating article, wherein, based on the total weight of the fiber tow with increased density: the total sum of the content of the solvent and the content of the curing agent is 9% by weight or more and 13% by weight or less. Claim 9 A method for manufacturing a filter for an aerosol generating article, further comprising the step of, in claim 5, wrapping the fiber tow with increased density with a filter paper to manufacture a filter for an aerosol generating article. Claim 10 A filter for an aerosol generating article manufactured by the method for manufacturing a filter for an aerosol generating article pursuant to Paragraph 5, wherein the hardness calculated according to the following Mathematical Formula 1 is 93% or higher: [Mathical Formula 1] Hardness (%) of the filter for an aerosol generating article = [(D f / D i )] X 100 In the above mathematical formula 1: D i is the initial diameter of the filter for the aerosol generating item, and D f is the diameter of a filter for an aerosol generating product when a force is applied from top to bottom for 15 seconds with a load of 300g.

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