Cigarette filters and smoking articles containing them

Abstract

A cigarette filter that reduces harmful smoke components is disclosed. In one view, the present invention provides a cigarette filter comprising a paper sheet, wherein the paper sheet comprises pulp fibers and chitosan fibers, and the pulp fibers comprise at least one of single fibers and mixed fibers having an average coarseness of 13 mg / 100 m or more.

Description

[Technical Field]

[0001] The present invention relates to a tobacco filter, and more specifically to a tobacco filter, a smoking article containing the same, and an aerosol generating apparatus. [Background technology]

[0002] Tobacco filters can be broadly classified into cellulose acetate filters, paper filters, and charcoal filters. Generally manufactured cellulose acetate filters may contain cellulose acetate tow.

[0003] Cellulose acetate filters were primarily used to reduce specific components in the smoke inhaled by consumers during the smoking process. However, they had the problem of reduced biodegradability, which prevented them from adequately reducing specific smoke components. [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] To address the aforementioned problems, attempts have been made to manufacture filters by mixing chitosan powder or chitosan fibers with cellulose fibers, or by creating them in the form of synthetic polymer fibers and nonwoven fabrics. However, these methods have the drawback of reduced biodegradability due to the properties of synthetic polymer fibers. Furthermore, in the case of nonwoven fabrics containing synthetic polymer fibers, adhesive components are required during the manufacturing process, which significantly reduces the reaction area of ​​amine functional groups on the surface of the chitosan fibers.

[0005] The object of the present invention is to solve the aforementioned problems and to provide a cigarette filter that can reduce harmful smoke components by increasing biodegradability and uniformly blending chitosan fibers with pulp fibers in the paper sheet, thereby maintaining a high reaction area for amine functional groups.

[0006] Another object of the present invention is to provide a method for manufacturing a tobacco filter that can increase the reaction area of amine functional groups without using an adhesive in the process of manufacturing a paper sheet and without requiring an additional process in the paper sheet manufacturing process.

[0007] Another object of the present invention is to provide a smoking article including the tobacco filter.

[0008] Another object of the present invention is to provide an aerosol generating device including the smoking article.

[0009] The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention not mentioned can be understood from the following description and can be more clearly understood from the embodiments of the present invention. Also, it can be easily understood that the objects and advantages of the present invention can be achieved by the means shown in the claims and combinations thereof.

Means for Solving the Problems

[0010] According to a first aspect of the present invention, there is provided a tobacco filter including a paper sheet, wherein the paper sheet includes pulp fibers and chitosan fibers, and the pulp fibers include at least one of single fibers and mixed fibers having an average coarseness of 13 mg / 100 m or more.

[0011] According to a second aspect of the present invention, in the first aspect, based on the total weight of the paper sheet, the content of the single fiber may be 50 to 99% by weight.

[0012] According to a third aspect of the present invention, in the first or second aspect, the mixed fibers may include sub-pulp fibers and recycled fibers.

[0013] According to a fourth aspect of the present invention, in any one of the first to third aspects, the content of the chitosan fibers may be 10 to 40% by weight, based on the total weight of the paper sheet.

[0014] According to the fifth aspect of the present invention, in any one of the first to fourth aspects, the basis weight of the paper sheet may be 20 to 60 gsm.

[0015] According to the sixth aspect of the present invention, in any one of the first to fifth aspects, the thickness of the paper sheet may be 60 to 100 μm.

[0016] According to the seventh aspect of the present invention, in any one of the first to sixth aspects, the bulk of the paper sheet is 2 to 4 cm 3 / g is also acceptable.

[0017] According to the eighth aspect of the present invention, in any one of the first to seventh aspects, the porosity of the paper sheet may be 2,000 to 30,000 CU in accordance with ISO 2965.

[0018] According to the ninth aspect of the present invention, a smoking article may be provided comprising a first part containing a medium and a second part containing a filter element, wherein the filter element includes a tobacco filter according to any one of the first to eighth aspects.

[0019] According to a tenth aspect of the present invention, the smoking article may further include a third portion interposed between the first and second portions in the ninth aspect, wherein the third portion includes a first cooling element or a tube filter.

[0020] According to the eleventh aspect of the present invention, in the ninth or tenth aspect, a smoking article comprising a fourth portion disposed on one side of the first portion may be provided, wherein at least one of the second portion and the fourth portion includes the paper sheet.

[0021] According to the twelfth aspect of the present invention, in the eleventh aspect, either the second part or the fourth part may include the paper sheet, and the other may include a cellulose acetate filter.

[0022] According to the thirteenth aspect of the present invention, in the eleventh aspect, the second and fourth parts may include the paper sheet.

[0023] According to the fourteenth aspect of the present invention, in the eleventh aspect, the fourth portion may include a second cooling element.

[0024] The means of solving the aforementioned problems do not merely enumerate all of the features of the present invention. The diverse features of the present invention and the advantages and effects thereof can be understood in more detail by referring to the specific examples below. [Effects of the Invention]

[0025] According to one aspect of the present invention, it is possible to realize a cigarette filter that enhances biodegradability, uniformly incorporates chitosan fibers with pulp fibers within the paper sheet, and maintains a high reaction area for amine functional groups, thereby reducing harmful smoke components.

[0026] According to another aspect of the present invention, a method for manufacturing cigarette filters can be realized that does not require additional steps in the paper sheet manufacturing process and does not use adhesives in the paper sheet manufacturing process, thereby increasing the reaction area of ​​amine functional groups.

[0027] Along with the effects mentioned above, the specific effects of the present invention will be described below, along with an explanation of the specific details for carrying out the invention. [Brief explanation of the drawing]

[0028] [Figure 1] Figure 1 is a schematic diagram of a paper sheet included in a cigarette filter according to one embodiment of the present invention. [Figure 2]Figure 2 is a flowchart showing a method for manufacturing a paper sheet according to one embodiment of the present invention. [Figure 3] Figure 3 is a perspective view showing a smoking article according to one embodiment of the present invention. [Figure 4] Figure 4 is a perspective view showing a smoking article according to another embodiment of the present invention. [Figure 5] Figure 5 is a perspective view showing a smoking article according to the present invention and other embodiments. [Figure 6] Figure 6 shows an aerosol generating apparatus to which a smoking article according to one embodiment of the present invention can be applied. [Figure 7] Figure 7 shows an aerosol generating apparatus to which smoking articles according to another embodiment of the present invention can be applied. [Modes for carrying out the invention]

[0029] In this specification, singular expressions include plural expressions unless otherwise clearly stated.

[0030] In this specification, "at least one of a, b, and c" may include a, b, or c individually, or two or more combinations selected from the group consisting of a, b, and c.

[0031] In this specification, the term "connection" is a concept that includes not only the direct connection of one component but also the indirect connection of components through the interposition of other components.

[0032] In this specification, a range of numbers indicated using the term "or" refers to a range of numbers that includes the values ​​listed before and after the term as the lower and upper limits, respectively. If multiple numbers are disclosed as upper and lower limits for any given range of numbers, the range of numbers disclosed in this specification can be understood as any range of numbers whose lower limit is any one of the multiple lower limits and whose upper limit is any one of the multiple upper limits, respectively. For example, if the specification states a to b, or c to d, it can be understood as specifying a range of a to b, a to d, c to d, or c to b.

[0033] In this specification, “Smoking article” can mean any product that is smokeable or can provide a smoking experience, whether or not it is based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. For example, a smoking article may include smokeable products such as cigarettes, cigars, and cigarillos. As another example, a smoking article may include combustible smoking articles or heated smoking articles.

[0034] In this specification, “upstream” or “upstream direction” may mean the direction away from the smoker’s mouth, and “downstream” or “downstream direction” may mean the direction closer to the smoker’s mouth. The terms upstream and downstream may be used to describe the relative positions of the elements constituting the smoking article.

[0035] In this specification, "longitudinal direction" may mean the direction corresponding to the longitudinal axis of the smoking article.

[0036] In this specification, "single fiber" may mean a fiber consisting of one type of raw material fiber. Specifically, the single fiber may mean an individual fiber that constitutes a pulp fiber.

[0037] In this specification, “mixed fiber” is a concept in contrast to a single fiber and may mean a fiber derived from two or more types of wood or plants; or a fiber that may include subpulp fibers and regenerated fibers.

[0038] <1. Cigarette filters> According to one aspect of the present invention, the present invention provides a cigarette filter comprising a paper sheet, wherein the paper sheet comprises pulp fibers and chitosan fibers, and the pulp fibers comprise at least one of single fibers and mixed fibers having an average coarseness of 13 mg / 100 m or more.

[0039] Traditionally, cellulose acetate filters have been primarily used to reduce harmful components in smoke inhaled by consumers during smoking (e.g., formaldehyde). However, cellulose acetate filters have a problem in that their biodegradability is low due to the introduction of acetyl groups into cellulose molecules through chemical treatment during the manufacturing process, resulting in slow decomposition in the natural environment and insufficient reduction of harmful smoke components. To address this, attempts have been made to manufacture filters by mixing chitosan powder or chitosan fibers with cellulose fibers or applying them to synthetic polymer fibers and forming them into nonwoven fabrics. However, these methods still suffer from low biodegradability, uneven distribution of chitosan fibers within the filter, and a low reaction area for the amine functional groups of chitosan. Furthermore, in the case of nonwoven fabrics containing synthetic polymer fibers, adhesive components are required during the manufacturing process, which significantly reduces the reaction area for the amine functional groups on the surface of the chitosan fibers.

[0040] According to one aspect of the present invention, by including at least one single fiber or mixed fiber with an average coarseness of 13 mg / 100m or more, and chitosan fibers in the paper sheet, the chitosan fibers are uniformly distributed within the paper sheet, which not only maintains a high reaction area for amine functional groups with respect to specific smoke components, but also allows for the provision of an environmentally friendly cigarette filter by utilizing the highly biodegradable properties of the paper sheet.

[0041] The configuration of the present invention will be described in more detail below, with reference to the drawings.

[0042] Figure 1 is a schematic diagram of a sheet included in a cigarette filter according to one embodiment of the present invention.

[0043] Referring to Figure 1, the paper sheet 100 according to the present invention can maintain a structure wound around a cigarette filter. When such a wound paper sheet 100 is unwound, it can be transformed into a sheet-shaped paper filter (step (a) in Figure 1).

[0044] The paper sheet 100 according to the present invention may include pulp fibers 10a and chitosan fibers 10b. Specifically, the pulp fibers 10a and chitosan fibers 10b may be uniformly mixed within the paper sheet 100.

[0045] The chitosan fiber 10b according to the present invention is manufactured from a polymer containing repeating units represented by the following chemical formula 1. Specifically, the surface of the chitosan fiber 10b contains an amine group (-NH2) as a functional group, which can react with smoke components transferred during the smoking process to reduce those smoke components. For example, the smoke component may be formaldehyde. Specifically, the formaldehyde can react with the amine functional group of the chitosan fiber and be adsorbed onto the surface of the chitosan fiber.

[0046] [ka]

[0047] Unlike typical cellulose acetate filters composed of multiple filaments, the paper sheet of the present invention is denser with respect to the filaments, allowing it to remove larger particulate matter to an appropriate level. Furthermore, the paper sheet of the present invention can further enhance its removal performance against vaporized matter by containing chitosan fibers. In other words, according to one aspect of the present invention, it is possible to remove particulate matter to an appropriate level while simultaneously enhancing its removal performance against vaporized matter.

[0048] According to some embodiments of the present invention, by including chitosan fibers and pulp fibers in the paper sheet, the filtration performance for particulate and vaporous substances per unit volume can be further improved compared to filters in which the chitosan fibers and pulp fibers are physically filled in separate spaces.

[0049] Figure 2 is a flowchart showing a method for manufacturing a paper sheet according to one embodiment of the present invention.

[0050] Referring to Figure 2, a method for manufacturing a paper sheet according to one embodiment of the present invention may include the steps of (S1) preparing pulp fibers by dissociating and beating raw pulp; (S2) producing pulp-chitosan fibers by mixing the pulp fibers with chitosan fibers; and (S3) producing a paper sheet from the pulp-chitosan fibers using a paper machine.

[0051] On the other hand, dissociation is the process of completely separating fibers by stirring with water, while beating refers to the process of applying force to the fibers in water to cut and break them, thereby creating finer fibers, in order to impart papermaking properties to the dissociated raw pulp. Differences in the method and degree of dissociation and beating can change the properties of the finely fibrous pulp fibers, which can consequently affect the structure and physical properties of the paper sheet. The more beating is performed, the higher the filtration rate, and the less beating is performed, the lower the filtration rate. Here, filtration rate is an index that quantitatively determines how much the fibers have been beaten. Paper strength can be increased through pulp fibers produced with a high filtration rate, as the bonding between fiber strands increases, resulting in denser and relatively stronger paper. Conversely, paper produced with a low filtration rate results in lower fiber density, allowing for the production of relatively softer paper.

[0052] In other words, the bulk and porosity of the paper sheet can change depending on how finely the raw pulp is processed. For example, under the same conditions of average roughness of a single fiber, a higher water filtration rate can result in a lower bulk paper sheet, and under the same conditions of water filtration, a higher average roughness of a single fiber can result in a higher bulk paper sheet. Therefore, by simultaneously adjusting the average roughness of a single fiber and the water filtration rate, the uniformity of the distribution of chitosan fibers within the paper sheet can be changed.

[0053] According to one embodiment of the present invention, in step (S1), the raw material pulp may be derived from one or more of wood and plants, and may be in a state prior to microfibrication. According to another embodiment of the present invention, in step (S1), the raw material pulp may be a mixture of subpulp fibers and regenerated fibers, and may be in a state prior to microfibrication.

[0054] According to some embodiments of the present invention, in the process of beating the raw material pulp, the degree of filtration may be 10°SR or higher, 11°SR or higher, 12°SR or higher, 13°SR or higher, 14°SR or higher, 15°SR or higher, 16°SR or higher, 17°SR or higher, 18°SR or higher, 19°SR or higher, or 20°SR or higher; or 29°SR or lower, 28°SR or lower, 27°SR or lower, 26°SR or lower, 25°SR or lower, 24°SR or lower, 23°SR or lower, 22°SR or lower, 21°SR or lower, 20°SR or lower, 19°SR or lower, 18°SR or lower, 17°SR or lower, 16°SR or lower, 15°SR or lower, 14°SR or lower, or 13.5°SR or lower; or any numerical range where any one of the above multiple lower limits and any one of the multiple upper limits are used as the lower limit and upper limit, respectively. Specifically, during the process of beating the raw pulp, the degree of filtration may be 13 to 20°SR, 13 to 19°SR, 13 to 18°SR, 13 to 17°SR, 13 to 16°SR, 13 to 15°SR, 13 to 14°SR, or 13 to 13.5°SR. According to some embodiments of the present invention, when the degree of filtration satisfies the above numerical range during the process of beating the raw pulp, the bulk performance of the paper sheet becomes excellent and a porous structure can be formed. As a result, the smoke component airflow can pass between the pulp fibers and chitosan fibers contained in the paper sheet, thereby increasing the reaction area that can react with amine functional groups, and consequently improving the ability to reduce the amount of harmful smoke component transfer.

[0055] According to some embodiments of the present invention, the pulp fibers include at least one of single fibers and mixed fibers having an average coarseness of 13 mg / 100 m or more. Here, average coarseness refers to the average mass per unit length of fiber.

[0056] Specifically, the average coarseness of the single fiber is 13 mg / 100m or more, 14 mg / 100m or more, 15 mg / 100m or more, 16 mg / 100m or more, 17 mg / 100m or more, 18 mg / 100m or more, 19 mg / 100m or more, 20 mg / 100m or more, 21 mg / 100m or more, 22 mg / 100m or more, 23 mg / 100m or more, 24 mg / 100m or more, 25 mg / 100m or more, 26 mg / 100m or more, 27 mg / 100m or more, or 28 mg / 100m or more; or 4 0 mg / 100m or less, 39 mg / 100m or less, 38 mg / 100m or less, 37 mg / 100m or less, 36 mg / 100m or less, 35 mg / 100m or less, 34 mg / 100m or less, 33 mg / 100m or less, 32 mg / 100m or less, 31 mg / 100m or less, 30 mg / 100m or less, 29 mg / 100m or less, or 28 mg / 100m or less; or any range of numbers where any one of the above lower limits and any one of the above upper limits are set as the lower limit and upper limit, respectively. More specifically, the average roughness of the single fiber may be 13 to 29 mg / 100m, 14 to 29 mg / 100m, 15 to 28 mg / 100m, 16 to 28 mg / 100m, 17 to 28 mg / 100m, 18 to 28 mg / 100m, 19 to 28 mg / 100m, 20 to 28 mg / 100m, 21 to 28 mg / 100m, 22 to 28 mg / 100m, 23 to 28 mg / 100m, 24 to 28 mg / 100m, 25 to 28 mg / 100m, 26 to 28 mg / 100m, or 27 to 28 mg / 100m.

[0057] According to some embodiments of the present invention, when the average roughness of the single fibers satisfies the aforementioned numerical range, the porosity of the paper sheet increases, and the effect of reducing the amount of smoke components transferred can be fully realized. On the other hand, fiber roughness is one of the properties of natural fibers such as wood and plants, and the higher the roughness, the more bulky the paper sheet can exhibit. If the roughness is low, there are many points where the fibers come into contact with each other and form hydrogen bonds, which can lead to a decrease in the porosity of the paper sheet, an increase in tensile strength, and the formation of an entangled structure between fibers. Therefore, the average roughness of the single fibers needs to be adjusted in order to blend well with the chitosan fibers. According to some embodiments of the present invention, when the average roughness of the single fibers satisfies the aforementioned numerical range, the pulp fibers can blend well with the chitosan fibers, and the chitosan fibers can be uniformly distributed within the paper sheet, thereby increasing the reaction area of ​​the amine functional groups on the surface of the chitosan fibers with respect to specific smoke components.

[0058] According to some embodiments of the present invention, by satisfying an appropriate organic combination relationship between the drainage range and the average roughness range of the single fibers, the porosity of the paper sheet can be further increased, thereby better realizing the effect of reducing the amount of smoke components transferred. Pulp fibers can be blended well with chitosan fibers, and the chitosan fibers can be uniformly distributed within the paper sheet, thereby increasing the reaction area of ​​the amine functional groups on the surface of the chitosan fibers with respect to specific smoke components.

[0059] For example, an analytical method conforming to KS M ISO 9184-6 can be used to analyze the average roughness of the single fiber.

[0060] For example, the average length of the pulp fibers may be 1 to 10 mm, or 3 to 7 mm.

[0061] According to some embodiments of the present invention, by satisfying an appropriate organic combination relationship between the filtration range and the average roughness range of the single fibers, the pulp fibers and chitosan fibers can be further mixed and the chitosan fibers can be uniformly distributed within the paper sheet in step (S2). Specifically, the pulp-chitosan fibers can mean a fiber aggregate in which pulp fibers and chitosan fibers are uniformly mixed.

[0062] According to some embodiments of the present invention, in step (S3), the paper machine may be a general paper machine or papermaking machine commonly used in the art. When using the pulp-chitosan fibers realized through steps (S1) and (S2), the bulk properties of the paper sheet are excellent and the porosity can be sufficiently high.

[0063] According to some embodiments of the present invention, the content of the single fiber may be 50% by weight or more based on the total weight of the paper sheet, and specifically, it may be 50 to 99% by weight, 50 to 90% by weight, 52 to 88% by weight, 53 to 86% by weight, 54 to 84% by weight, 55 to 83% by weight, 56 to 82% by weight, 57 to 81% by weight, 58 to 80% by weight, 59 to 79% by weight, 60 to 75% by weight, 62 to 74% by weight, or 63 to 70% by weight. According to some embodiments of the present invention, by satisfying the above numerical range for the content of the single fiber, the workability of manufacturing the paper sheet can be improved and the filtration performance of the paper sheet can be sufficiently achieved.

[0064] A mixed fiber according to one embodiment of the present invention may be a mixture of pulp fibers derived from two or more types of wood and / or plants. For example, the wood and plants are not particularly limited and may be raw materials that can be used to manufacture paper sheets in the art. Specifically, the wood may be evergreen trees, broad-leaved trees, coniferous trees, etc., and the plants may be bamboo, hemp, flax, etc. More specifically, the wood may include one or more of Southern Pine, Mixed Softwood, Cedrus, Hardwood, and Softwood. However, the technical concept of the present invention is not limited thereto.

[0065] According to some embodiments of the present invention, the mixed fibers may include subpulp fibers and regenerated fibers. According to some embodiments of the present invention, by using mixed fibers which are a mixture of subpulp fibers and regenerated fibers, the chitosan fibers can be further blended in the paper sheet, thereby increasing the porosity of the paper sheet and fully realizing the effect of reducing the amount of transfer to smoke components. Specifically, the subpulp fibers may be pulp fibers derived from evergreen trees, and more specifically, Southern Pine. For example, based on the total weight of the mixed fibers, the content of the subpulp fibers may be 50% or more by weight, 51% or more by weight, 52% or more by weight, 53% or more by weight, 54% or more by weight, 55% or more by weight, 56% or more by weight, 57% or more by weight, 58% or more by weight, 59% or more by weight, 60% or more by weight, 61% or more by weight, 62% or more by weight, 63% or more by weight, 64% or more by weight, 65% or more by weight, 66% or more by weight, 67% or more by weight, 68% or more by weight, 69% or more by weight, 70% or more by weight, 71% or more by weight, 72% or more by weight, 73% or more by weight, 74% or more by weight, 75% or more by weight, 76% or more by weight, 77% or more by weight, 78% or more by weight, 79% or more by weight, or 80% or more by weight. Specifically, the subpulp fibers may be the same as or different from the single fibers. For example, the regenerated fiber may contain one or more of rayon and lyocell, and specifically, it may contain rayon.

[0066] According to some embodiments of the present invention, the weight ratio of subpulp fibers to regenerated fibers (subpulp fibers:regenerated fibers) may be 9:1 to 5:5, more specifically 8:2 to 6:4, and more specifically 8:2 to 7:3. According to some embodiments of the present invention, when the weight ratio of subpulp fibers to regenerated fibers satisfies the above numerical range, the porosity of the paper sheet increases, and the effect of reducing the amount of smoke components transferred can be fully realized.

[0067] In the future, according to several embodiments, the chitosan fiber content, based on the total weight of the paper sheet, is 10% by weight or more, 11% by weight or more, 12% by weight or more, 13% by weight or more, 14% by weight or more, 15% by weight or more, 16% by weight or more, 17% by weight or more, 18% by weight or more, 19% by weight or more, 20% by weight or more, 21% by weight or more, 22% by weight or more, 23% by weight or more, 24% by weight or more, 25% by weight or more, 26% by weight or more, 27% by weight or more, 28% by weight or more, 29% by weight or more, 30% by weight or more, 31% by weight or more, 32% by weight or more, 33% by weight or more, 34% by weight or more, 35% by weight or more, 36% by weight or more, 37% by weight or more, 38% by weight or more, or 39% by weight or more; or 40% by weight or less, 39% by weight % or less, 38% by weight or less, 37% by weight or less, 36% by weight or less, 35% by weight or less, 34% by weight or less, 33% by weight or less, 32% by weight or less, 31% by weight or less, 30% by weight or less, 29% by weight or less, 28% by weight or less, 27% by weight or less, 26% by weight or less, 25% by weight or less, 24% by weight or less, 23% by weight or less, 22% by weight or less, 21% by weight or less, 20% by weight or less, 19% by weight or less, 18% by weight or less, 17% by weight or less, 16% by weight or less, 15% by weight or less, 14% by weight or less, 13% by weight or less, 12% by weight or less, or 11% by weight or less; or a range of any number where any one value from the above multiple lower limits and any one value from the above multiple upper limits are set as the lower limit and upper limit, respectively. Specifically, the chitosan fiber content may be 10 to 40% by weight, 15 to 35% by weight, 20 to 30% by weight, 22 to 28% by weight, 23 to 27% by weight, or 25 to 26% by weight, based on the total weight of the paper sheet. According to some embodiments of the present invention, by satisfying the above numerical range for the chitosan fiber content based on the total weight of the paper sheet, sufficient reduction capacity for specific smoke components can be achieved, and the ease of manufacturing the paper sheet can be sufficiently achieved. Here, the ease of manufacturing the paper sheet can be said to mean that adhesive is not required in the paper sheet manufacturing process. If adhesive is used in the paper sheet manufacturing process, there is a possibility that the reaction area of ​​the amine functional groups on the surface of the chitosan fibers with respect to specific smoke components will be greatly reduced.

[0068] On the other hand, the basis weight of a paper sheet is the weight per unit area (g / m²) of the paper sheet. 2 =gsm), which may affect the functionality and workability of the paper sheet.

[0069] According to some embodiments of the present invention, the basis weight of the paper sheet is 20 gsm or more, 21 gsm or more, 22 gsm or more, 23 gsm or more, 24 gsm or more, 25 gsm or more, 26 gsm or more, 27 gsm or more, 28 gsm or more, 29 gsm or more, 30 gsm or more, 31 gsm or more, 32 gsm or more, 33 gsm or more, 34 gsm or more, 35 gsm or more, 36 gsm or more, 37 gsm or more, 38 gsm or more, 39 gsm or more. , 40gsm or more, 41gsm or more, 42gsm or more, 43gsm or more, 44gsm or more, 45gsm or more, 46gsm or more, 47gsm or more, 48gsm or more, 49gsm or more, 50gsm or more, 51gsm or more, 52gsm or more, 53gsm or more, 54gsm or more, 55gsm or more, 56gsm or more, 57gsm or more, 58gsm or more, or 59gsm or more; 60gsm or less, 59gsm or less, 58gsm or less , 57gsm or less, 56gsm or less, 55gsm or less, 54gsm or less, 53gsm or less, 52gsm or less, 51gsm or less, 50gsm or less, 49gsm or less, 48gsm or less, 47gsm or less, 46gsm m or less, 45gsm or less, 44gsm or less, 43gsm or less, 42gsm or less, 41gsm or less, 40gsm or less, 39gsm or less, 38gsm or less, 37gsm or less, 36gsm or less, 35gsm or less, 34 The basis weight may be less than or equal to gsm, less than or equal to 33gsm, less than or equal to 32gsm, less than or equal to 31gsm, less than or equal to 30gsm, less than or equal to 29gsm, less than or equal to 28gsm, less than or equal to 27gsm, less than or equal to 26gsm, less than or equal to 25gsm, less than or equal to 24gsm, less than or equal to 23gsm, less than or equal to 22gsm, or less than or equal to 21gsm; or any range of numbers where any one of the above lower limits and any one of the above upper limits are the lower limit and upper limit, respectively. Specifically, the basis weight of the paper sheet may be 20 to 60gsm, 25 to 55gsm, 30 to 50gsm, or 35 to 45gsm. According to some embodiments of the present invention, if the basis weight of the paper sheet is less than the above numerical range, the chitosan fiber content will be low, which may cause problems in which the smoke components and the amine functional groups on the surface of the chitosan fibers cannot react sufficiently, and if it exceeds the above numerical range, manufacturing difficulties may arise due to problems of high stiffness and an excessive increase in the thickness of the paper sheet.

[0070] According to some embodiments of the present invention, the thickness of the paper sheet is 60 μm or more, 61 μm or more, 62 μm or more, 63 μm or more, 64 μm or more, 65 μm or more, 66 μm or more, 67 μm or more, 68 μm or more, 69 μm or more, 70 μm or more, 71 μm or more, 72 μm or more, 73 μm or more, 74 μm or more, 75 μm or more, 76 μm or more, 77 μm or more, 78 μm or more, 79 μm or more. , 80μm or larger, 81μm or larger, 82μm or larger, 83μm or larger, 84μm or larger, 85μm or larger, 86μm or larger, 87μm or larger, 88μm or larger, 89μm or larger, 90μm or larger, 91μm or larger, 92μm or larger, 93μm or larger, 94μm or larger, 95μm or larger, 96μm or larger, 97μm or larger, 98μm or larger, or 99μm or larger; 100μm or smaller, 99μm or smaller, 98μm or smaller, 9 7μm or less, 96μm or less, 95μm or less, 94μm or less, 93μm or less, 92μm or less, 91μm or less, 90μm or less, 89μm or less, 88μm or less, 87μm or less, 86μm or less, 85μm or less, 84μm or less, 83μm or less, 82μm or less, 81μm or less, 80μm or less, 79μm or less, 78μm or less, 77μm or less, 76μm or less, 75μm or less, 74μm or less, 73μm or less, 72μm or less, 71μm or less, 70μm or less, 69μm or less, 68μm or less, 67μm or less, 66μm or less, 65μm or less, 64μm or less, 63μm or less, 62μm or less, or 61μm or less; or any range of numbers where any one of the above lower limits and any one of the above upper limits are the lower limit and upper limit, respectively. Specifically, the thickness of the paper sheet may be 60 to 100μm. If the thickness of the paper sheet is less than the above numerical range, the achievable suction resistance level may become excessively low or the paper sheet may tear, potentially causing problems in the manufacturing process. If the thickness of the paper sheet exceeds the above numerical range, tearing may occur during the filter manufacturing process, or a suction resistance high enough to cause abnormal suction of smoking items may occur.

[0071] On the one hand, the bulk of the paper sheet is the thickness value with respect to the basis weight of the paper sheet. It can be shown that as the porosity of the paper sheet increases, the bulk of the paper sheet also tends to increase. In order for the smoke components to smoothly pass through the wound paper sheet and react with the amine functional groups on the surface of the chitosan fibers, the paper sheet may preferably have an appropriate porosity and bulk.

[0072] According to some embodiments of the present invention, the bulk of the paper sheet is 2 cm 3 / g or more, 2.1 cm 3 / g or more, 2.2 cm 3 / g or more, 2.3 cm 3 / g or more, 2.4 cm 3 / g or more, 2.5 cm 3 / g or more, 2.6 cm 3 / g or more, 2.7 cm 3 / g or more, 2.8 cm 3 / g or more, 2.9 cm 3 / g or more, 3.0 cm 3 / g or more, 3.1 cm 3 / g or more, 3.2 cm 3 / g or more, 3.3 cm 3 / g or more, 3.4 cm 3 / g or more, 3.5 cm 3 / g or more, 3.6 cm 3 / g or more, 3.7 cm 3 / g or more, 3.8 cm 3 / g or more, or 3.9 cm 3 / g or more; 4.0 cm 3 / g or less, 3.9 cm 3 / g or less, 3.8 cm 3 / g or less, 3.7 cm 3 / g or less, 3.6 cm 3 / g or less, 3.5 cm 3 / g or less, 3.4 cm 3 / g or less, 3.3 cm 3 / g or less, 3.2 cm 3 / g or less, 3.1 cm 3 / g or less, 3.0 cm 3 / g or less, 2.9 cm 3 / g or less, 2.8 cm 3 / g or less, 2.7 cm3 / g or less, 2.6cm 3 / g or less, 2.5cm 3 / g or less, 2.4cm 3 / g or less, 2.3cm 3 / g or less, 2.2cm 3 Less than / g, or 2.1cm 3 / g or less; or any range of any number of values ​​where any one of the multiple lower limits and any one of the multiple upper limits are the lower limit and upper limit, respectively. Specifically, the bulk of the paper sheet is 2 to 4 cm 3 / g, 2.5 to 4cm 3 / g, 2.6 to 4cm 3 / g, 2.95 to 4cm 3 / g, 2.95 to 3.5 cm 3 / g, 2.95 to 3.26 cm 3 It may also be / g. According to some embodiments of the present invention, if the bulk of the paper sheet is less than the numerical range, a problem may occur in which a pressure drop occurs so that the smoke component airflow cannot pass through, and if it exceeds the numerical range, a problem may occur in which the surface area on which the amine functional group and the smoke component can come into contact is actually reduced structurally.

[0073] According to some embodiments of the present invention, the air permeability of the paper sheet is 2,000 CU (CORESTA Unit, cm²). 3 / (min·cm 2·kPa)) or more, 3000CU or more, 4000CU or more, 5000CU or more, 6000CU or more, 7000CU or more, 8000CU or more, 9000CU or more, 10000C U or more, 11000CU or more, 12000CU or more, 13000CU or more, 14000CU or more, 15000CU or more, 16000CU or more, 17000CU or more, 1800 0 CU or more, 19000 CU or more, 20000 CU or more, 21000 CU or more, 22000 CU or more, 23000 CU or more, 24000 CU or more, 25000 CU or more, 26000 CU or more, 27000 CU or more, 28000 CU or more, or 29000 CU or more; 30000 CU or less, 29000 CU or less, 28000 CU or less, 27000 CU The following ranges may be 26,000 CU or less, 25,000 CU or less, 24,000 CU or less, 23,000 CU or less, 22,000 CU or less, 21,000 CU or less, 20,000 CU or less, 19,000 CU or less, 18,000 CU or less, 17,000 CU or less, 16,000 CU or less, 15,000 CU or less, 14,000 CU or less, 13,000 CU or less, 12,000 CU or less, 11,000 CU or less, 10,000 CU or less, 9,000 CU or less, 8,000 CU or less, 7,000 CU or less, 6,000 CU or less, 5,000 CU or less, 4,000 CU or less, or 3,000 CU or less; or any range of numbers where any one of the above lower limits and any one of the above upper limits are the lower limit and upper limit, respectively. Specifically, the porosity of the paper sheet may be 2,000 to 30,000 CU. According to some embodiments of the present invention, if the porosity of the paper sheet is below the above numerical range, a problem may occur in which a pressure drop so large that the smoke component airflow cannot pass through occurs, and if it exceeds the above numerical range, a problem may occur in which the surface area on which the amine functional group and the smoke component can come into contact is actually reduced structurally.

[0074] According to some embodiments of the present invention, a humectant may be applied to at least a portion of the surface of the paper sheet in order to achieve a desired degree of pressure drop. Here, pressure drop can mean the resistance of air felt by the user when they hold the smoking item in their mouth and inhale air. Since the smoking satisfaction felt by the user can differ depending on the pressure drop, it is necessary to achieve a target pressure drop. For example, the humectant may include at least one of glycerin, guar gum, starch, methylcellulose, ethylene vinyl acetate (EVA), gum arabic, and propylene glycol. For example, the content of the humectant applied to at least a portion of the surface of the paper sheet may be 0.5 mg / mm to 5 mg / mm.

[0075] According to some embodiments of the present invention, a cigarette filter may further contain granules to improve the bonding strength between the humectant and the paper sheet. Specifically, the granules can be added and placed on the surface of the paper sheet to improve the bonding strength between the humectant and the paper sheet. For example, the granules may include a coating layer formed on their surface to prevent them from cracking or breaking due to external impact. According to one example, the coating layer is made of microcrystalline cellulose, anhydrous lactose, Cellactose 80 (75% microcrystalline cellulose and 25% lactose processed simultaneously), isomalt, dibasic dihydrate calcium phosphate, calcium carbonate, calcium lactate, dibasic anhydrous calcium phosphate, tribasic calcium phosphate, calcium silicate, calcium sulfate, carbomer, calcium carboxymethylcellulose, sodium carboxymethylcellulose, cellulose, silicified microcrystalline cellulose, cellulose acetate, ceratonia, copovidone, and corn starch. starch, dextrate, dextrin, dextrose, erythritol, ethylcellulose, fructose, fumaric acid, glyceryl monooleate, glyceryl monostearate, glyceryl palmitostearate, hydroxyethylcellulose, hydroxyethylmethylcellulose, hydroxypropyl beta-dex (HydroxypropylBetadex), hydroxypropylcellulose, hydroxypropyl starch, hypromellose, hypromellose acetate succinate, kaolin, lactitol, anhydrous lactose, lactose monohydrate, magnesium carbonate, magnesium oxide, maltitol, maltodextrin, maltose, mannitol, methylcellulose, polaxamer, polycarbophil, polydextrose, poly(DL-lactic acid), polyethylene glycol, polyethylene oxide, polymethacrylate, polyoxyglyceride, polyvinyl alcohol, povidone, shellac, simethicone, sodium alginate, sodium chloride, sorbitol, starch, gelatinized starch, sucrose, spheroidal sugar (Sugar It may contain at least one of the following: spheres, sulfobutyl ether B-cyclodextrin, titanium dioxide, trehalose, fine crystalline wax, white wax, yellow wax, xanthan gum, xylitol, beeswax, candelilla, carnauba, caraway, sugarcane wax, myrtle wax, gum arabic, locust bean wax, guar gum, alginate, carrageenan, and pectin.

[0076] According to some embodiments of the present invention, the paper sheet may be formed by winding it into a cylindrical shape, and its circumference may be 20 to 25 mm. For example, the paper sheet may be formed by clipping a base paper and winding the paper, or it may be manufactured by winding the base paper so that it becomes cylindrical when wound. In this case, the circumference of the paper sheet may be the circumference of the bottom surface after it has been wound into a cylindrical shape.

[0077] <2. Smoking items> According to another aspect of the present invention, a smoking article comprising a first part including a medium and a second part including a filter element, wherein the filter element includes a tobacco filter according to several embodiments. According to several embodiments of the present invention, by including a tobacco filter (paper sheet) in the filter element, chitosan fibers are uniformly distributed within the paper sheet, which not only maintains a high reaction area for amine functional groups to specific smoke components, but also provides an environmentally friendly smoking article by utilizing the highly biodegradable properties of the paper sheet.

[0078] Figure 3 is a perspective view showing a smoking article according to one embodiment of the present invention.

[0079] Referring to Figure 3, the first smoking article 200a according to the present invention may be, as one embodiment of the smoking article 200, for example, a combustible cigarette.

[0080] The first smoking article 200a according to the present invention includes a first part 210 and a second part 220. The first smoking article 200a may further include a wrapper 250. Specifically, the first part 210 and the second part 220 may be arranged sequentially along the length of the first smoking article 200a. More specifically, the first part 210 may be positioned upstream of the second part 220. In this case, the wrapper 250 can wrap at least one of the first part 210 and the second part 220, specifically, a part of the first part 210 and all of the second part 220. For example, the first and second parts 210 and 220 may have a circumferential shape.

[0081] The first part 210 according to the present invention includes a medium that can generate smoke and / or aerosols when burned. Specifically, when the first part 210 is burned, the generated mainstream smoke can be inhaled by the user via the second part 220, described later, in the longitudinal direction of the first smoking article 200a.

[0082] For example, the medium is not particularly limited and may be a substance that can generate common smoke and / or aerosols commonly used in the art. Specifically, the medium may include tobacco raw materials such as tobacco leaf scraps and tobacco stems, and substances processed therefrom. More specifically, the medium may include crushed tobacco leaves, swollen midribs, tobacco shavings (e.g., leaf tobacco shavings, plate-shaped leaf shavings), tobacco sheets (e.g., plate-shaped leaves), etc.

[0083] According to some embodiments of the present invention, the medium may further contain one or more additives, which are humectants and flavoring agents. For example, a humectant can maintain the moisture content in the medium at an appropriate level, soften the inherent flavor, and increase the amount of atomization. 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 flavoring agent may include licorice, sucrose, fructose syrup, isosweet, cocoa, lavender, cardabomb, celery, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oil, keraway, cognac, jasmine, chamomile, menthol, cinnamon, ylang-ylang, sage, spearmint, ginger, coriander, clove extract (or clove material), or coffee.

[0084] The second portion 220 according to the present invention may be a filter that performs a filtering function for smoke and / or aerosols generated by the first portion 210. Specifically, the second portion 220 may be located downstream of the first portion 210 and connected to the downstream end of the first portion 210.

[0085] The second part 220 according to the present invention includes a filter element to perform the filtration function. Specifically, the filter element includes a cigarette filter according to some embodiments of the present invention, and more specifically, may include a wound paper sheet 100.

[0086] The wrapper 250 according to the present invention is cylindrical and may be placed on the surface of the paper sheet 100, and more specifically, may surround the paper sheet 100. More specifically, the wrapper 250 may be filter wrapping paper or chip paper. For example, if the wrapper 250 is filter wrapping paper, it can surround the paper sheet 100, and if the wrapper is chip paper, it can surround the filter wrapping paper. For example, the wrapper 250 may contain cellulose or dextrin.

[0087] Figure 4 is a perspective view showing a smoking article according to another embodiment of the present invention. Descriptions that overlap with the preceding explanation will be briefly explained or omitted.

[0088] Referring to Figure 4, the second smoking article 200b according to the present invention may be, as another embodiment of the smoking article 200, for example, a combustible cigarette.

[0089] The second smoking article 200b according to the present invention may further include a third portion 230 interposed between the first portion 210 and the second portion 220. Specifically, the third portion 230 may be located on one side of the first portion 210 or on one side of the second portion 220. More specifically, the second smoking article 200b according to the present invention may be arranged in a continuous order along its length: the first portion 210, the third portion 230, and the second portion 220.

[0090] A third portion 230 according to one embodiment of the present invention can cool the airflow passing through the first portion 210 from outside the second smoking article 200b. Specifically, the third portion 230 may include a first cooling element.

[0091] According to one embodiment of the present invention, the first cooling element may be a cylindrical paper tube made of paper material and containing a hollow core. Specifically, the inner surface of the paper tube may be coated with polylactic acid. According to some embodiments of the present invention, coating the inner surface of the paper tube with polylactic acid can more effectively cool the mainstream smoke and / or aerosol of the cigarette generated when the first portion 210 is ignited.

[0092] In another embodiment of the present invention, the first cooling element may be formed from a biodegradable polymer material, specifically from polylactic acid fibers.

[0093] According to yet another embodiment of the present invention, the first cooling element may be a cellulose acetate filter.

[0094] The wrapper 250 according to the present invention may surround at least one of the first to third portions 210, 220, and 230.

[0095] Figure 5 is a perspective view showing a smoking article according to another embodiment of the present invention. Descriptions that overlap with the preceding explanation will be briefly explained or omitted.

[0096] Referring to Figure 5, the third smoking article 200c according to the present invention may be, as another embodiment of the smoking article 200, for example, a heated tobacco product. Specifically, the third smoking article 200c may be a heated tobacco product that is heated externally or internally by an aerosol generating device described later.

[0097] The third smoking article 200c according to the present invention may further include a fourth portion 240 disposed on one side of the first portion 210. Specifically, the fourth portion 240, the first portion 210, the third portion 230, and the second portion 220 may be arranged in that order along the length of the third smoking article 200c. That is, the first portion 210 may be interposed between the third portion 230 and the fourth portion 240, and the third portion 230 may be interposed between the first portion 210 and the second portion 220.

[0098] The third smoking article 200c according to the present invention may include a wrapper 250 that encloses at least one of the first to fourth parts 210, 220, 230, and 240 described above.

[0099] The fourth part 240 according to one embodiment of the present invention may be an aerosol-generating substrate. Specifically, the fourth part 240 may include an aerosol-generating substance. For example, the aerosol-generating substance may include at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol.

[0100] According to yet another embodiment of the present invention, at least one of the second portion 220 and the fourth portion 240 may include a paper sheet according to several embodiments. Specifically, by including a paper sheet according to several embodiments of the present invention in at least one of the second portion 220 and the fourth portion 240, it is possible to maintain the functionality of heated tobacco products while exhibiting even better biodegradability of smoking articles.

[0101] According to yet another embodiment of the present invention, either the second portion 220 or the fourth portion 240 may include the paper sheet and the other may include a cellulose acetate filter. Specifically, the second portion 220 may include the cellulose acetate filter and the fourth portion 240 may include the paper sheet. More specifically, the paper sheet of the fourth portion 240 may be impregnated with the aerosol-generating substance described above. According to some embodiments of the present invention, including a paper sheet impregnated with the aerosol-generating substance in the fourth portion 240 further increases the impregnation rate of the aerosol-generating substance into the paper sheet, thereby further improving the atomization function.

[0102] According to yet another embodiment of the present invention, the second portion 220 and the fourth portion 240 may include the paper sheet. Specifically, by including the paper sheet according to some embodiments of the present invention in the second portion 220 and the fourth portion 240, it is possible to improve the ability to reduce specific smoke components and simultaneously achieve atomization functionality, thereby providing a highly biodegradable smoking article.

[0103] According to yet another embodiment of the present invention, the fourth portion 240 may include a second cooling element for cooling the atomization supplied from a liquid cartridge. In this case, the second portion 220 may include a paper sheet according to some embodiments of the present invention. For example, the second cooling element may be the same as or different from the first cooling element. Specifically, the second cooling element may be a cylindrical paper tube made of paper material and containing a hollow. According to yet another embodiment of the present invention, the inner surface of the paper tube may be coated with polylactic acid. By coating the inner surface of the paper tube with polylactic acid, the atomization supplied from the liquid cartridge can be cooled more effectively.

[0104] A third part 230 relating to another embodiment of the present invention may include a tube filter. The tube filter is a filter through which atomization is transferred and may be a hollow cellulose acetate filter.

[0105] Figure 6 shows an aerosol generating apparatus to which a smoking article according to one embodiment of the present invention can be applied.

[0106] The aerosol generating apparatus 300 according to one embodiment of the present invention may be the first aerosol generating apparatus 300a.

[0107] Referring to Figure 6, a first aerosol generator 300a according to one embodiment of the present invention may include a housing (not shown), a heater 330, a control unit 320, and a battery 310. For example, the first aerosol generator 300a may further include other general or common components in addition to the components shown. Specifically, the first aerosol generator 300a may further include an output module (e.g., motor, display) for outputting the status of the device and / or an input module (e.g., button) for receiving user input (e.g., device on / off).

[0108] The housing according to the present invention can form the external appearance of the first aerosol generating device 300a and can form a housing space for accommodating the third smoking article 200c according to some embodiments of the present invention.

[0109] The heater 330 according to the present invention can generate smoke and / or aerosol by heating a third smoking article 200c housed in a containment space. A third smoking article 200c according to some embodiments of the present invention, housed in such a containment space, can generate smoke and / or aerosol by being heated by the heater. The generated smoke and / or aerosol can be inhaled through the user's mouth.

[0110] Although Figure 6 shows the heater 330 as being implemented using an internal heating method, this is merely for the sake of understanding, and it can also be modified to use an external heating method. For example, the heater 330 can be implemented using an electrical resistance heater or an induction heating method.

[0111] The control unit 320 according to the present invention can control the operation of the first aerosol generator 300a in general. For example, the control unit 320 can control the operation of the heater 330 and the battery 310, and can also control the operation of other components included in the first aerosol generator 300a. Specifically, the control unit 320 can control the power supplied by the battery 310, the heating temperature of the heater 330, and so on. The control unit 320 can also check the state of each component of the first aerosol generator 300a and determine whether the first aerosol generator 300a is in an operational state.

[0112] The control unit 320 according to the present invention can be implemented by at least one processor. The processor can be implemented by an array of many logic gates, or by a combination of a general-purpose microprocessor and memory storing a program that can be executed by the microprocessor.

[0113] The battery 310 according to the present invention can supply power used to operate the first aerosol generator 300a. For example, the battery 310 can supply power to the heater 330 and can supply the power necessary for the control unit 320 to operate. In addition, the battery 310 can supply the power necessary for the operation of electrical components such as the display, sensors, and motors provided in the first aerosol generator 300a.

[0114] Figure 7 shows an aerosol generating apparatus to which smoking articles according to another embodiment of the present invention can be applied.

[0115] Referring to Figure 7, the aerosol generating apparatus 300 according to another embodiment of the present invention may be the second aerosol generating apparatus 300b.

[0116] The second aerosol generating apparatus 300b according to the present invention may further include a vaporizer 340.

[0117] The vaporizer 340 according to the present invention can vaporize a liquid aerosol-forming substrate and generate an aerosol. For example, the vaporizer 340 may include a liquid storage tank for storing the liquid aerosol-forming substrate, a wick for absorbing the stored liquid, and a liquid vaporization element for vaporizing the absorbed liquid. In this case, the liquid vaporization element may be realized as a heating element, as a vibrating element for vaporizing the liquid through ultrasonic vibration, or in other forms. In another example, the vaporizer 340 may not include a wick. The liquid vaporization element of the vaporizer 340 may be controlled by a control unit 320.

[0118] The aerosol generated in the vaporizer 340 can pass through the third smoking article 200c and be inhaled through the user's mouth.

[0119] The heater 330 according to the present invention can be positioned appropriately to realize an external heating method.

[0120] The following describes embodiments of the present invention in detail so that those with ordinary skill in the art to which the present invention pertains can easily implement it. However, these are merely examples, and the scope of the present invention is not limited by the following.

[0121] [Experimental Example 1: Evaluation of the bulk performance of paper sheets based on the average roughness of pulp fibers and water filtration rate]

[0122] Pulp fibers were produced by dissociating and beating raw pulp of various origins to create fine fibers. During the beating process of the raw pulp, the degree of filtration was adjusted to the values ​​shown in Table 1 below.

[0123] On the other hand, the bulk of a paper sheet is the ratio of the paper sheet's thickness to its basis weight (thickness / basis weight). Specifically, regarding the bulk performance of a paper sheet, 2.90 cm3 / g or more 4.0cm 3 If the value is less than / g, it is considered "excellent," 2.50cm 3 / g or more 2.90cm 3 If less than / g, it is classified as "Excellent," 2.20cm 3 / g or more 2.50cm 3 If the value was less than / g, it was rated as "normal".

[0124] Furthermore, the average roughness of a single fiber was analyzed in accordance with KS M ISO 9184-6.

[0125] [Table 1]

[0126] Referring to Table 1 above, it can be confirmed that the average roughness changes depending on the origin of the pulp fibers. The origin of the pulp fibers, whether or not regenerated fibers are additionally included in the raw pulp, and the degree of filtration (degree of beating) can all potentially influence the achievement of superior bulk performance in paper sheets. Specifically, when the average roughness of the single fibers is the same, comparing the bulk performance of paper sheets in preparation examples 2 and 4 in terms of filtration degree, it can be confirmed that the bulk performance of the paper sheets decreases as the degree of filtration increases.

[0127] When the filtration efficiency is the same, comparing the bulk performance of paper sheets based on the average roughness of a single fiber in implementation examples 2 and 3, it can be confirmed that the higher the average roughness of a single fiber, the higher the bulk of the paper sheet and the better the bulk performance it exhibits.

[0128] Comparing the bulk performance of paper sheets resulting from the mixing of subpulp fibers and recycled fibers in implementation preparation examples 1 and 2, it can be confirmed that manufacturing paper sheets using a mixed fiber containing subpulp fibers and recycled fibers further increases the bulk performance of the paper sheets.

[0129] Comparing implementation examples 1 and 5 in terms of the bulk performance of paper sheets based on the filtration efficiency adjustment range of the mixed fibers, it can be confirmed that when manufacturing paper sheets with mixed fibers containing subpulp fibers and recycled fibers, lowering the filtration efficiency further improves the bulk performance of the paper sheets. Through this, it can be inferred that including recycled fibers in the paper sheet further widens the filtration efficiency adjustment range required to achieve excellent bulk performance in the paper sheet.

[0130] Based on the experimental results described above, it can be inferred that the degree to which smoke components pass smoothly through the paper sheet and the degree to which the amine functional groups of the chitosan fibers react with the smoke components can vary depending on the appropriate porosity and bulk of the paper sheet.

[0131] [Experimental Example 2: Reference data demonstrating the particulate removal effect of paper sheets on CA filters]

[0132] The removal capacity was derived through the following steps: 1) measuring the amount of smoke components transferred from a cigarette without a cigarette filter; 2) measuring the amount of smoke components transferred from a cigarette with a cigarette filter under the same conditions; 3) calculating the amount of smoke components removed by the filter, which is the difference between the amount of smoke components transferred in 1) and the amount of smoke components transferred in 2); and 4) calculating the ratio of 3) to 1) to calculate the removal capacity.

[0133] [Table 2]

[0134] Referring to Table 2 above, it can be confirmed that the paper sheet has significantly higher removal capabilities for particulate matter, tar, and nicotine compared to the cellulose acetate tow filter. 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 made by those skilled in the art using the basic concepts of the present invention as defined in the following claims also fall within the scope of the present invention. [Explanation of Symbols]

[0135] 10a: Pulp fiber 10b: Chitosan fiber 100: Paper sheet 200: Smoking items 200a: 1. Smoking Articles 200b: Second smoking item 200c: Third Smoking Article 210: Part 1 220:Second part 230: 3rd part 240: 4th part 250: Rapper 300: Aerosol generator 300a: First aerosol generator 300b: Second aerosol generator 310: Battery 320: Control Unit 330: Heater 340: Steamer

Claims

1. A cigarette filter containing a paper sheet, The aforementioned paper sheet is Containing pulp fibers and chitosan fibers, The pulp fibers are, Single fibers with an average coarseness of 13 mg / 100 m or more, A blend containing at least one of the following fibers: Cigarette filters.

2. Based on the total weight of the aforementioned paper sheet, the content of the single fiber is 50 to 99% by weight. A tobacco filter according to claim 1.

3. The aforementioned mixed fibers are Including subpulp fibers and regenerated fibers, A tobacco filter according to claim 1.

4. Based on the total weight of the paper sheet, the chitosan fiber content is 10 to 40% by weight. A tobacco filter according to claim 1.

5. The basis weight of the aforementioned paper sheet is 20 to 60 gsm. A tobacco filter according to claim 1.

6. The thickness of the aforementioned paper sheet is 60 to 100 μm. A tobacco filter according to claim 1.

7. The bulk of the aforementioned paper sheet is 2 to 4 cm. ３ / g is A tobacco filter according to claim 1.

8. The porosity of the aforementioned paper sheet is 2,000 to 30,000 CU. A tobacco filter according to claim 1.

9. A first part containing the medium, A second part containing a filter element, and including, The aforementioned filter element is Including the tobacco filter described in claim 1, Smoking items.

10. Further including a third part interposed between the first and second parts, The third part mentioned above is Including a first cooling element or tube filter, The smoking article according to claim 9.

11. Further including a fourth portion located on one side of the first portion, At least one of the second and fourth parts includes the paper sheet, The smoking article according to claim 10.

12. Either the second part or the fourth part includes the paper sheet, and the other includes a cellulose acetate filter. The smoking article according to claim 11.

13. The second and fourth parts include the paper sheet, The smoking article according to claim 11.

14. The fourth part includes a second cooling element, The smoking article according to claim 11.

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