Cigarette filter and smoking article comprising same

Abstract

Disclosed is a cigarette filter that reduces harmful smoke components. According to one aspect, provided is a cigarette filter comprising a paper sheet, the paper sheet comprising paper pulp fibers and chitosan fibers, and the paper pulp fibers comprising at least one of single fibers and mixed fibers having an average roughness of 13 mg / 100 m or more.

Description

Technical Field

[0001] This invention relates to cigarette filters, and more specifically, to cigarette filters, smoking articles including the same, and aerosol generating apparatus. Background Technology

[0002] Cigarette filters can be broadly categorized into cellulose acetate filters, paper filters, and charcoal filters. Cellulose acetate filters typically consist of cellulose acetate tow.

[0003] In order to reduce certain components in inhaled smoke, cellulose acetate filters are mainly used during the smoking process. However, they have poor biodegradability and cannot adequately reduce certain smoke components. Summary of the Invention

[0004] The problem the invention aims to solve To address the aforementioned issues, attempts have been made to manufacture filter tips by mixing chitosan powder or chitosan fibers with cellulose fibers, or with synthetic polymer fibers, to create nonwoven fabrics. However, this method suffers from poor biodegradability due to the characteristics of synthetic polymer fibers. Furthermore, the manufacturing process of nonwoven fabrics containing synthetic polymer fibers requires the use of adhesives, which significantly reduces the reactive surface area of ​​the amine functional groups on the chitosan fiber surface.

[0005] The purpose of this invention is to solve the above-mentioned problems and provide a cigarette filter tip that improves biodegradability while uniformly mixing chitosan fibers with pulp fibers in the paper sheet, thereby maintaining a high surface area for amine functional groups to reduce harmful smoke components.

[0006] Another object of the present invention is to provide a method for preparing a cigarette filter tip, wherein the method for preparing the cigarette filter tip does not require additional processes in the paper manufacturing process and does not use adhesives in the paper manufacturing process, thereby increasing the reaction surface area of ​​amine functional groups.

[0007] Another object of the present invention is to provide a smoking article comprising the above-described cigarette filter.

[0008] Another object of the present invention is to provide an aerosol generating apparatus comprising the above-mentioned smoking articles.

[0009] The objectives of this invention are not limited to those mentioned above. Other objectives and advantages of the invention not mentioned can be understood through the following description and can be more clearly illustrated through embodiments of the invention. Furthermore, it will be readily understood that the objectives and advantages of the invention can be achieved through the means and combinations thereof described in the claims.

[0010] means for solving problems According to a first aspect of the present invention, a cigarette filter tip is provided, which is a cigarette filter tip comprising a paper sheet, said paper sheet comprising pulp fibers and chitosan fibers, said pulp fibers comprising at least one of single fibers and mixed fibers having an average roughness of 13 mg / 100 m or more.

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

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

[0013] According to a fourth aspect of the invention, in any of the first to third aspects described above, the content of the chitosan fiber can be from 10% by weight to 40% by weight, based on the total weight of the paper sheet.

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

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

[0016] According to a seventh aspect of the present invention, in any of the first to sixth aspects described above, the bulk of the paper sheet can be from 2 cm³ / g to 4 cm³ / g.

[0017] According to an eighth aspect of the invention, in any of the first to seventh aspects described above, the porosity of the paper sheet can be from 2,000 CU to 30,000 CU in accordance with ISO 2965.

[0018] According to a ninth aspect of the present invention, a smoking article is provided, comprising: a first portion including a medium; and a second portion including a filter element; wherein the filter element comprises a cigarette filter according to any one of the first to eighth aspects.

[0019] According to a tenth aspect of the present invention, in the aforementioned ninth aspect, a smoking article may be provided, the smoking article further comprising a third portion between the aforementioned first portion and the aforementioned second portion; the third portion comprising a first cooling element or a tubular filter tip.

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

[0021] According to the twelfth aspect of the invention, in the eleventh aspect described above, one of the second and fourth parts may include the paper sheet, and the other may include a cellulose acetate filter tip.

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

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

[0024] The above technical solutions do not list all the features of the present invention. The various features of the present invention, and the advantages and effects based on these features, can be understood in more detail by referring to the specific embodiments described below.

[0025] Invention Effects In one aspect, the present invention provides a cigarette filter tip that, while improving biodegradability, allows chitosan fibers to be uniformly mixed with pulp fibers in the paper sheet, thereby maintaining a high surface area for amine functional groups to react and reduce harmful smoke components.

[0026] In another aspect, the present invention provides a method for preparing a cigarette filter tip, which does not require additional processes in the paper manufacturing process and does not use adhesives in the paper manufacturing process, thereby increasing the reaction surface area of ​​the amine functional groups.

[0027] In addition to the effects described above, the specific effects of the invention will be described while explaining the specific details of implementing the invention. Attached Figure Description

[0028] Figure 1 This is a schematic diagram illustrating a piece of paper included in a cigarette filter according to an embodiment of the present invention.

[0029] Figure 2 A flowchart illustrating a method for manufacturing paper according to an embodiment of the present invention.

[0030] Figure 3 A perspective view of a smoking article according to an embodiment of the present invention.

[0031] Figure 4 A perspective view of a smoking article according to another embodiment of the present invention.

[0032] Figure 5 A perspective view of a smoking article according to another embodiment of the present invention is provided.

[0033] Figure 6 An aerosol generating apparatus for smoking articles according to an embodiment of the present invention is provided.

[0034] Figure 7 An aerosol generating apparatus for smoking articles according to another embodiment of the present invention. Detailed Implementation

[0035] In this specification, unless otherwise explicitly stated, any statement indicating a singular number should be understood to include plural numbers.

[0036] In this specification, "at least one of a, b and c" means that it may include a, b or c alone, or include two or more combinations selected from the group consisting of a, b and c.

[0037] The term "connection" as used in this specification means not only that certain components are directly connected, but also includes the concept of indirect connections between components through other components.

[0038] The term "to / to" as used herein refers to the range of values ​​specified as the lower and upper limits, respectively, preceding or following the term. When multiple values ​​are mentioned as the upper or lower limit of any range, the range described herein can be understood as a range with any one of the mentioned upper limits as its upper limit and any one of the mentioned lower limits as its lower limit. For example, when describing a to b or c to d in the specification, it can be understood as describing a above and below b, a above and below d, c above and below d, or c above and below b.

[0039] In this specification, "smoking article" can refer to any smokeable product or any product that provides a smoking experience, regardless of whether it is based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. For example, smoking articles can include smokeable products such as cigarettes, cigars, and cigarillos. As another example, smoking articles can include combustible smoking articles or heated smoking articles.

[0040] In this specification, "upstream" or "upstream direction" can refer to a direction away from the smoker's mouth, while "downstream" or "downstream direction" can refer to a direction closer to the smoker's mouth. The terms "upstream" and "downstream" can be used to describe the relative positions of the components constituting a smoking article.

[0041] In this specification, "longitudinal direction" can refer to the direction corresponding to the longitudinal axis of the smoking article.

[0042] In this specification, "single fiber" can refer to a fiber made from a single raw material pulp. Specifically, the aforementioned single fiber can refer to a single fiber bundle that forms pulp fibers.

[0043] In this specification, "mixed fiber" is a concept relative to single fiber and may refer to fibers derived from two or more types of wood or herbaceous plants; or may include pulp fibers and recycled fibers.

[0044] 1. Cigarette filter tip According to one aspect of the present invention, a cigarette filter tip is provided, which is a cigarette filter tip comprising a paper sheet, said paper sheet comprising pulp fibers and chitosan fibers, said pulp fibers comprising at least one of single fibers and mixed fibers having an average roughness of 13 mg / 100 m or more.

[0045] Previously, cellulose acetate filters were primarily used to reduce harmful components in cigarette smoke (e.g., formaldehyde) inhaled during smoking. However, the manufacturing process of cellulose acetate filters involves chemically introducing acetyl groups into cellulose molecules, leading to decreased biodegradability and an inability to rapidly decompose in the natural environment. Furthermore, they are insufficient to adequately reduce high concentrations of harmful cigarette smoke components. To address these issues, attempts have been made to mix chitosan powder or chitosan fibers with cellulose-based fibers, or to incorporate them into synthetic polymer fibers and fabricate them as nonwoven fabrics for filter manufacturing. However, these methods still suffer from low biodegradability, and the uneven distribution of chitosan fibers within the filter results in a small reaction surface area for the chitosan amine functional groups. Additionally, the manufacturing process of nonwoven fabrics containing synthetic polymer fibers requires the use of adhesives, which significantly reduces the reaction surface area of ​​the amine functional groups on the chitosan fiber surface.

[0046] According to one aspect of the present invention, by including at least one of single fibers and mixed fibers with an average roughness of 13 mg / 100 m or more, as well as chitosan fibers, in the paper sheet, and making the chitosan fibers uniformly distributed inside the paper sheet, the reaction area of ​​the amine functional groups to specific smoke components can be maintained at a high level. By utilizing the high biodegradability of the paper sheet, an environmentally friendly cigarette filter can be provided.

[0047] The structure of the invention will be described in more detail below with reference to the accompanying drawings.

[0048] Figure 1 This is a schematic diagram illustrating a piece of paper included in a cigarette filter according to an embodiment of the present invention.

[0049] Reference Figure 1 The paper sheet 100 according to the present invention can maintain a curled structure in a cigarette filter. When the curled paper sheet 100 is unrolled, it can be transformed into a sheet-shaped paper filter. Figure 1 Step (a)).

[0050] The paper sheet 100 according to the present invention may comprise pulp fibers 10a and chitosan fibers 10b. More specifically, the pulp fibers 10a and chitosan fibers 10b may be in a uniformly mixed state within the paper sheet 100.

[0051] The chitosan fiber 10b according to the present invention is made of a polymer comprising repeating units represented by the following chemical formula 1. Specifically, since the surface of the chitosan fiber 10b contains amine groups (-NH2) as functional groups, it can react with migrating smoke components during smoking, thereby reducing the smoke components. For example, the smoke component can be formaldehyde. More specifically, the formaldehyde can react with the amine functional groups of the chitosan fiber and be adsorbed onto the surface of the chitosan fiber.

[0052] [Chemical Formula 1]

[0053] Unlike typical cellulose acetate filters composed of multiple filaments, the paper sheet of the present invention is denser than filaments, thus enabling the removal of larger particulate matter at an appropriate level. Furthermore, since the paper sheet according to the present invention contains chitosan fibers, the removal performance for vapor phase substances can be further improved. In other words, according to one aspect of the present invention, particulate matter can be removed to an appropriate level while simultaneously improving the removal performance for vapor phase substances.

[0054] According to some embodiments of the present invention, by simultaneously including chitosan fibers and pulp fibers within the aforementioned paper sheet, the filtration performance per unit volume for both particulate and vapor phase substances can be further improved compared to a filter nozzle in which chitosan fibers and pulp fibers are physically filled in different spaces.

[0055] Figure 2 A flowchart illustrating a method for manufacturing paper according to an embodiment of the present invention.

[0056] Reference Figure 2 A method for manufacturing paper sheets according to an embodiment of the present invention may include: step (S1), dissociating and beating raw pulp to prepare pulp fibers; step (S2), mixing the pulp fibers and chitosan fibers to obtain pulp-chitosan fibers; and step (S3), manufacturing paper sheets from pulp-chitosan fibers using a paper machine.

[0057] On the other hand, dissociation is the process of completely separating fibers by stirring with water, while beating is the process of applying force to the fibers in water to cut and split them in order to impart papermaking properties to the dissociated pulp, thereby achieving a certain degree of microfibrillation. Depending on the methods and degrees of dissociation and beating, the characteristics of microfibrillated pulp fibers can be altered, thus affecting the structure and properties of the paper. Higher beating degrees result in higher water permeability, and lower beating degrees result in lower water permeability. Water permeability is a quantitative indicator of the degree of fiber beating. Pulp fibers prepared with high water permeability can improve paper strength, and with increased bonding between fiber bundles, more dense and relatively strong paper can be produced. Conversely, pulp fibers prepared with low water permeability result in lower fiber bundle density, thus producing relatively softer paper.

[0058] In other words, the bulk and porosity of the paper sheet vary depending on the degree of microfibrillation of the raw pulp. For example, under the condition of the same average roughness of individual fibers, as the water permeability increases, the bulk of the paper sheet may decrease; conversely, under the condition of the same water permeability, the higher the average roughness of individual fibers, the higher the bulk of the paper sheet may be. Therefore, by simultaneously adjusting the average roughness and water permeability of individual fibers, the uniformity of chitosan fiber distribution in the paper sheet can be adjusted.

[0059] According to one embodiment of the present invention, the raw material pulp in step (S1) may be pulp in a non-microfibrillated state derived from at least one of wood or herbaceous plants. According to another embodiment of the present invention, in step (S1), the raw material pulp may be a mixture comprising sub-pulp fibers and recycled fibers, also in a non-microfibrillated state.

[0060] According to some embodiments of the present invention, during the pulping process of the above-mentioned raw material pulp, the water content can be 10. SR and above, 11 SR and above, 12 SR and above, 13 SR and above, 14 SR and above, 15 SR and above, 16 SR and above, 17 SR and above, 18 SR and above, 19 SR or above or 20 SR or above; or 29 SR and below, 28 SR and below, 27 SR and below, 26 SR and below, 25 SR and below, 24 SR and below, 23 SR and below, 22 SR and below, 21 SR and below, 20 SR and below, 19 SR and below, 18 SR and below, 17 SR and below, 16 SR and below, 15 SR and below, 14 SR or below or 13.5 Below SR; or any range of values ​​where any one of multiple lower limits is used as the lower limit and any one of multiple upper limits is used as the upper limit. Specifically, during the pulping process of the above-mentioned raw material pulp, the water content can be 13. SR to 20 SR, 13 SR to 19 SR, 13 SR to 18 SR, 13 SR to 17 SR, 13 SR to 16 SR, 13 SR to 15 SR, 13 SR to 14 SR or 13 SR to 13.5 SR. According to some embodiments of the present invention, when the water content meets the above-mentioned numerical range during the pulping process of the above-mentioned raw material pulp, the bulk properties of the paper sheet can be significantly improved to form a porous structure. Therefore, when the flue gas component gas stream passes through the pulp fibers and chitosan fibers contained in the paper sheet, the contact reaction area with the amine functional groups can be increased, resulting in enhanced ability to reduce the migration of harmful flue gas components.

[0061] According to some embodiments of the present invention, the pulp fibers described above comprise at least one of single fibers and mixed fibers with an average coarseness of 13 mg / 100 m or more. The average coarseness refers to the average mass per unit length of the fiber.

[0062] More specifically, the average roughness of the aforementioned single fiber can be above 13 mg / 100 m, above 14 mg / 100 m, above 15 mg / 100 m, above 16 mg / 100 m, above 17 mg / 100 m, above 18 mg / 100 m, above 19 mg / 100 m, above 20 mg / 100 m, above 21 mg / 100 m, above 22 mg / 100 m, above 23 mg / 100 m, above 24 mg / 100 m, above 25 mg / 100 m, above 26 mg / 100 m, above 27 mg / 100 m, or above 28 mg / 100 m. Above; or below 40mg / 100m, below 39mg / 100m, below 38mg / 100m, below 37mg / 100m, below 36mg / 100m, below 35mg / 100m, below 34mg / 100m, below 33mg / 100m, below 32mg / 100m, below 31mg / 100m, below 30mg / 100m, below 29mg / 100m, or below 28mg / 100m; or any numerical range that takes any one of multiple lower limits as its lower limit and any one of multiple upper limits as its upper limit. More specifically, the average roughness of the aforementioned single fiber can be 13 mg / 100m to 29 mg / 100m, 14 mg / 100m to 29 mg / 100m, 15 mg / 100m to 28 mg / 100m, 16 mg / 100m to 28 mg / 100m, 17 mg / 100m to 28 mg / 100m, 18 mg / 100m to 28 mg / 100m, 19 mg / 100m to 28 mg / 100m, 20 mg / 100m to 28 mg / 100m, 21 mg / 100m to 28 mg / 100m, 22 mg / 100m to 28 mg / 100m, 23 mg / 100m to 28 mg / 100m, 24 mg / 100m to 28 mg / 100m, 25 mg / 100m to 28 mg / 100m, 26 mg / 100m to 28 mg / 100m, or 27 mg / 100m to 28 mg / 100m.

[0063] According to some embodiments of the present invention, when the average roughness of the single fiber meets the above-mentioned numerical range, the porosity of the paper sheet can be increased, thereby fully realizing the effect of reducing the migration of flue gas components. On the other hand, as fiber roughness is one of the characteristics of natural fibers such as wood and herbs, the higher the roughness, the more likely the paper sheet will exhibit greater bulk. If the roughness is low, the number of contact points for forming hydrogen bonds between fibers increases, which may lead to a decrease in paper sheet porosity, an increase in tensile strength, and the formation of fiber entanglement structures. Therefore, in order to achieve good mixing with chitosan fibers, it is necessary to adjust the average roughness of the single fiber. According to some embodiments of the present invention, when the average roughness of the single fiber meets the above-mentioned numerical range, it can promote good mixing of pulp fibers and chitosan fibers, thereby making the chitosan fibers uniformly distributed in the paper sheet, thereby increasing the reaction area of ​​the amine functional groups on the surface of chitosan fibers for specific flue gas components.

[0064] According to some embodiments of the present invention, by satisfying the synergistic relationship between the above-mentioned water permeability range and the above-mentioned average roughness range of a single fiber at an appropriate level, the porosity of the paper sheet can be further improved to enhance the effect of reducing the migration of flue gas components and to better mix the pulp fibers and chitosan fibers, thereby making the chitosan fibers uniformly distributed in the paper sheet to enhance the reaction area of ​​its amine functional groups for specific flue gas components.

[0065] For example, the average roughness of the above single fiber can be analyzed using analytical methods conforming to the KS M ISO 9184-6 standard.

[0066] For example, the average length of the pulp fibers mentioned above can be 1 mm to 10 mm or 3 mm to 7 mm.

[0067] According to some embodiments of the present invention, by satisfying the synergistic relationship between the aforementioned filtration degree and the aforementioned average roughness range of a single fiber at an appropriate level, a better mixing of pulp fibers and chitosan fibers can be achieved in step (S2), so that the chitosan fibers can be uniformly distributed in the paper sheet. Specifically, the aforementioned pulp-chitosan fibers can refer to a fiber aggregate in a uniformly mixed state of pulp fibers and chitosan fibers.

[0068] According to some embodiments of the present invention, the paper machine used in step (S3) above can be a conventional paper machine or papermaking machine commercially available in the relevant technical field. If the pulp-chitosan fiber obtained through steps (S1) and (S2) above is used, the resulting paper sheet has excellent bulk characteristics and sufficiently high porosity.

[0069] According to some embodiments of the present invention, based on the total weight of the paper sheet, the content of the single fiber can be 50% by weight or more, specifically 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 ensuring that the content of the single fiber meets the above-mentioned numerical range, the workability of the paper sheet can be improved, and the filtration performance of the paper sheet can be fully realized.

[0070] According to one embodiment of the present invention, the mixed fiber can be a mixture of pulp fibers derived from two or more types of wood and / or herbaceous plants. For example, the aforementioned wood or herbaceous plants are not particularly limited and can be any raw material that can be used in the art to prepare paper sheets. More specifically, the aforementioned wood can be evergreen trees, broad-leaved trees, or coniferous trees, and the aforementioned herbaceous plants can be bamboo, flax, etc. More specifically, the aforementioned wood can include at least one of Southern Pine, Mixed Softwood, Cedrus, Hardwood, and Softwood. However, the technical concept of the present invention is not limited thereto.

[0071] According to some embodiments of the present invention, the aforementioned mixed fibers may include sub-pulp fibers and recycled fibers. According to some embodiments of the present invention, by using mixed fibers comprising sub-pulp fibers and recycled fibers, chitosan fibers can be better mixed in the paper sheet, thereby increasing the porosity of the paper sheet and thus achieving a sufficient reduction in the migration of smoke components. Specifically, the aforementioned sub-pulp fibers may be pulp fibers derived from evergreen trees, more specifically, they may be Southern Pine. For example, based on the total weight of the aforementioned mixed fibers, the content of the aforementioned sub-pulp fibers can be 50% by weight or more, 51% by weight or more, 52% by weight or more, 53% by weight or more, 54% by weight or more, 55% by weight or more, 56% by weight or more, 57% by weight or more, 58% by weight or more, 59% by weight or more, 60% by weight or more, 61% by weight or more, 62% by weight or more, 63% by weight or more, 64% by weight or more, 65% by weight or more, 66% by weight or more, 67% by weight or more, 68% by weight or more, 69% by weight or more, 70% by weight or more, 71% by weight or more, 72% by weight or more, 73% by weight or more, 74% by weight or more, 75% by weight or more, 76% by weight or more, 77% by weight or more, 78% by weight or more, 79% by weight or more, or 80% by weight or more. Specifically, the aforementioned sub-pulp fibers can be the same as or different from the aforementioned single fibers. For example, the aforementioned recycled fibers can include one or more of rayon and lyocell, specifically, they can include rayon.

[0072] According to some embodiments of the present invention, the weight ratio of the sub-pulp fiber to the recycled fiber (sub-pulp fiber: recycled fiber) can be from 9:1 to 5:5, specifically from 8:2 to 6:4, and more specifically from 8:2 to 7:3. According to some embodiments of the present invention, when the weight ratio of the sub-pulp fiber to the recycled fiber meets the above-mentioned numerical range, the porosity of the paper increases, thereby achieving a sufficient reduction in migration.

[0073] According to some embodiments of the present invention, based on the total weight of the paper sheet, the content of the chitosan fiber can be 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 more. Below 39% by weight, below 38% by weight, below 37% by weight, below 36% by weight, below 35% by weight, below 34% by weight, below 33% by weight, below 32% by weight, below 31% by weight, below 30% by weight, below 29% by weight, below 28% by weight, below 27% by weight, below 26% by weight, below 25% by weight, below 24% by weight, below 23% by weight, below 22% by weight, below 21% by weight, below 20% by weight, below 19% by weight, below 18% by weight, below 17% by weight, below 16% by weight, below 15% by weight, below 14% by weight, below 13% by weight, below 12% by weight, or below 11% by weight; or any range of values ​​where any one of the multiple lower limits is taken as its lower limit and any one of the multiple upper limits is taken as its upper limit. Specifically, based on the total weight of the paper sheet, the content of the chitosan fiber can 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. According to some embodiments of the present invention, by ensuring that the content of the chitosan fiber based on the total weight of the paper sheet meets the above-mentioned numerical range, the ability to reduce specific smoke components can be sufficiently achieved while ensuring the workability of the paper sheet. Here, the workability of the paper sheet can mean that no adhesive is required in the paper sheet manufacturing process. If an adhesive is used in the paper sheet manufacturing process, the reaction area between the amino functional groups on the surface of the chitosan fiber and the specific smoke components may be significantly reduced.

[0074] On the other hand, the basis weight of the paper is the weight per unit area of ​​the paper (g / m²). 2 =gsm), which will affect the functionality and manufacturability of the paper.

[0075] According to some embodiments of the present invention, the basis weight of the above-mentioned paper sheet can be 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, or 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; or below 60gsm, 59gsm or more. Below 5gsm, below 58gsm, below 57gsm, below 56gsm, below 55gsm, below 54gsm, below 53gsm, below 52gsm, below 51gsm, below 50gsm, below 49gsm, below 48gsm, below 47gsm, below 46gsm, below 45gsm, below 44gsm, below 43gsm, below 42gsm, below 41gsm, below 40gsm, below 39gsm, below 38gsm, below 37gsm The following values ​​are allowed: below 36gsm, below 35gsm, below 34gsm, below 33gsm, below 32gsm, below 31gsm, below 30gsm, below 29gsm, below 28gsm, below 27gsm, below 26gsm, below 25gsm, below 24gsm, below 23gsm, below 22gsm, or below 21gsm; or any range of values ​​where any one of the multiple lower limits is used as the lower limit and any one of the multiple upper limits is used as the upper limit. More specifically, the basis weight of the aforementioned paper can be 20 to 60gsm, 25 to 55gsm, 30 to 50gsm, or 35 to 45gsm. According to some embodiments of the present invention, when the basis weight of the paper is lower than the above-mentioned numerical range, the content of chitosan fiber decreases, which may lead to insufficient reaction between the smoke components and the amine functional groups on the surface of the chitosan fiber. When the basis weight exceeds the above-mentioned numerical range, the high stiffness and excessive increase in paper thickness may cause difficulties in the manufacturing process.

[0076] According to some embodiments of the present invention, the thickness of the paper sheet can be 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. μm and above, 80μm and above, 81μm and above, 82μm and above, 83μm and above, 84μm and above, 85μm and above, 86μm and above, 87μm and above, 88μm and above, 89μm and above, 90μm and above, 91μm and above, 92μm and above, 93μm and above, 94μm and above, 95μm and above, 96μm and above, 97μm and above, 98μm and above, or 99μm and above; below 100μm, 99μm and above Below, below 98μm, below 97μm, below 96μm, below 95μm, below 94μm, below 93μm, below 92μm, below 91μm, below 90μm, below 89μm, below 88μm, below 87μm, below 86μm, below 85μm, below 84μm, below 83μm, below 82μm, below 81μm, below 80μm, below 79μm, below 78μm, below 77μm, 7 The thickness of the paper sheet can be 6μm 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 values ​​where any one of the lower limits is used as the lower limit and any one of the upper limits is used as the upper limit. Specifically, the thickness of the paper sheet can be from 60μm to 100μm. When the thickness of the paper sheet is less than the above range, it may result in an achievable draw resistance level that is too low, or problems may occur during the manufacturing process due to tearing of the paper sheet. When the thickness of the paper sheet exceeds the above range, it may cause bursting during the manufacturing process of the filter tip, or result in a draw resistance that is high enough to affect the inhalability of the smoking article.

[0077] On the other hand, the bulk of the paper sheet is the thickness value relative to the paper sheet's basis weight. As the porosity of the paper sheet increases, the bulk of the paper sheet also tends to increase. To allow the smoke components to pass smoothly through the rolled paper sheet and react with the amine functional groups on the surface of the chitosan fibers, the paper sheet preferably has appropriate porosity and bulk.

[0078] According to some embodiments of the present invention, the bulk of the paper sheet can be 2 cm³ / g or more, 2.1 cm³ / g or more, 2.2 cm³ / g or more, 2.3 cm³ / g or more, 2.4 cm³ / g or more, 2.5 cm³ / g or more, 2.6 cm³ / g or more, 2.7 cm³ / g or more, 2.8 cm³ / g or more, 2.9 cm³ / g or more, 3.0 cm³ / g or more, 3.1 cm³ / g or more, 3.2 cm³ / g or more, 3.3 cm³ / g or more, 3.4 cm³ / g or more, 3.5 cm³ / g or more, 3.6 cm³ / g or more, 3.7 cm³ / g or more, 3.8 cm³ / g or more, or 3.9 cm³ / g or more; or less than 4.0 cm³ / g. The following values ​​are acceptable: below 3.9 cm³ / g, below 3.8 cm³ / g, below 3.7 cm³ / g, below 3.6 cm³ / g, below 3.5 cm³ / g, below 3.4 cm³ / g, below 3.3 cm³ / g, below 3.2 cm³ / g, below 3.1 cm³ / g, below 3.0 cm³ / g, below 2.9 cm³ / g, below 2.8 cm³ / g, below 2.7 cm³ / g, below 2.6 cm³ / g, below 2.5 cm³ / g, below 2.4 cm³ / g, below 2.3 cm³ / g, below 2.2 cm³ / g, or below 2.1 cm³ / g; or any range of values ​​where any one of the lower limits is used as the lower limit and any one of the upper limits is used as the upper limit. Specifically, the bulk of the aforementioned paper sheet can be 2 cm. 3 / g to 4cm 3 / g, 2.5cm 3 / g to 4cm 3 / g, 2.6cm 3 / g to 4cm 3 / g, 2.95cm 3 / g to 4cm 3 / g, 2.95cm 3 / g to 3.5cm 3 / g, 2.95cm 3 / g to 3.26cm 3 / g. According to some embodiments of the present invention, when the bulk of the paper sheet is lower than the above-mentioned numerical range, a pressure drop problem may occur in which the flue gas component airflow cannot pass through; when it is higher than the above-mentioned numerical range, the area of ​​the flue gas component that can structurally contact the amine functional group is reduced.

[0079] According to some embodiments of the present invention, the air permeability of the above-mentioned paper sheet can be 2000 CU (CORESTA Unit, cm⁻¹). 3 / (min·cm) 2·kPa or above, 3000CU or above, 4000CU or above, 5000CU or above, 6000CU or above, 7000CU or above, 8000CU or above, 9000CU or above, 10000CU or above, 11000CU or above, 12000CU or above, 13000CU or above, 14000CU or above, 15000CU or above, 16000CU or above, 17000CU or above, 18000CU or above, 19000CU or above, 20000CU or above, 21000CU or above, 22000CU or above, 23000CU or above, 24000CU or above, 25000CU or above, 26000CU or above, 27000CU or above, 28000CU or above, or 29000CU or above; or below 30000CU, below 29000CU, 280 Below 00CU, below 27000CU, below 26000CU, below 25000CU, below 24000CU, below 23000CU, below 22000CU, below 21000CU, below 20000CU, below 19000CU, below 18000CU, below 17000CU, below 16000CU, below 15000CU, below 14000CU, below 13000CU, below 12000CU, below 11000CU, below 10000CU, below 9000CU, below 8000CU, below 7000CU, below 6000CU, below 5000CU, below 4000CU, or below 3000CU; or any numerical range that uses any one of multiple lower limits as its lower limit and any one of multiple upper limits as its upper limit. Specifically, the porosity of the aforementioned paper sheet can be from 2,000 CU to 30,000 CU. According to some embodiments of the present invention, if the porosity of the aforementioned paper sheet is lower than the above-mentioned range, it may cause the pressure to drop to the point where the flue gas component airflow cannot pass through. If it exceeds the above-mentioned range, structurally, the contact area between the amino functional groups and the flue gas components may actually decrease.

[0080] According to some embodiments of the present invention, to achieve a desired pressure drop, a humectant may be coated on at least a portion of the surface of the paper. Pressure drop refers to the air resistance felt by a user when biting the smoking object and inhaling air. Since pressure drop affects the user's smoking satisfaction, a target pressure drop needs to be achieved. For example, the humectant may contain at least one of glycerin, guar gum, starch, methylcellulose, ethylene vinyl acetate (EVA), gum arabic, and propylene glycol. For example, the humectant content coated on at least a portion of the surface of the paper may be from 0.5 mg / mm to 5 mg / mm.

[0081] According to some embodiments of the present invention, the cigarette filter may further contain particles to improve the adhesion between the humectant and the paper. More specifically, by incorporating and placing the particles on the surface of the paper, the adhesion between the humectant and the paper can be improved. For example, to prevent the particles from breaking or shattering due to external impact, the particles may contain a coating formed on their surface. In one example, the coating may contain 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, tricalcium phosphate, calcium silicate, calcium sulfate, carbomer, calcium carboxymethyl cellulose, sodium carboxymethyl cellulose, cellulose, and silicified microcrystalline cellulose. cellulose, cellulose acetate, carob gum, copovidone, corn starch, pregelatinized starch, glucose binder (Dextrate), dextrin, glucose (Dextrose), erythritol, ethyl cellulose, fructose, fumaric acid, glyceryl monooleate (Glyceryl)monooleate, glyceryl monostearate, glyceryl palmitate, hydroxyethyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl beta-cyclodextrin, hydroxypropyl cellulose, hydroxypropyl starch, hydroxypropyl methyl cellulose, hydroxypropyl methyl cellulose acetate succinate, kaolin, lactitol, anhydrous lactose, lactose monohydrate, magnesium carbonate, magnesium oxide, maltitol Maltodextrin, maltose, mannitol, methylcellulose, poloxamer, polycarbophil, polydextrose, poly(DL-lactic acid), polyethylene glycol, polyethylene oxide, polymethyl methacrylate, polyoxyglycerol, polyvinyl alcohol, povidone, shellac, simethicone, sodium alginate, sodium chloride, sorbitol, starch, sucrose, sugar pills The ingredients include at least one of the following: spheres, sulfobutyl ether-β-cyclodextrin, titanium dioxide, trehalose, microcrystalline wax, white wax, yellow wax, xanthan gum, xylitol, beeswax, candelilla wax, carnauba wax, caraway wax, sugarcane wax, myrtle wax, gum arabic, carob gum, guar gum, alginate, carrageenan, and pectin.

[0082] According to some embodiments of the present invention, the paper sheet is formed by winding it into a cylindrical shape, and its circumference can be 20 mm to 25 mm. For example, the paper sheet can be formed by winding a crimped paper to obtain a curled paper, or it can be obtained by winding a paper sheet so that it is cylindrical after being rolled. In this case, the circumference of the paper sheet can refer to the circumference of its bottom surface after being rolled into a cylindrical shape.

[0083] 2. Smoking items According to another aspect of the present invention, a smoking article is provided, comprising: a first portion including a medium; and a second portion including a filter element; wherein the filter element includes a cigarette filter tip according to some embodiments. According to some embodiments of the present invention, since the filter element includes a cigarette filter tip (paper), not only can chitosan fibers be uniformly distributed in the paper, thereby maintaining a large reaction area for amino functional groups targeting specific smoke components, but the highly biodegradable properties of the paper also allow for the provision of an environmentally friendly smoking article.

[0084] Figure 3 A perspective view of a smoking article according to an embodiment of the present invention.

[0085] Reference Figure 3 According to the present invention, the first smoking article 200a is an embodiment of the smoking article 200, and may be, for example, a combustible cigarette.

[0086] The first smoking article 200a according to the present invention includes a first portion 210 and a second portion 220. The first smoking article 200a may further include wrapping paper 250. Specifically, the first portion 210 and the second portion 220 may be arranged sequentially along the length direction of the first smoking article 200a. More specifically, the first portion 210 may be arranged upstream of the second portion 220. In this case, the wrapping paper 250 may wrap at least one of the first portion 210 and the second portion 220, specifically, it may wrap a portion of the first portion 210 and the entire second portion 220. For example, the first portion 210 and the second portion 220 may have a cylindrical shape.

[0087] The first part 210 according to the invention may include a medium capable of generating smoke and / or aerosols when burned. Specifically, the mainstream smoke generated when the first part 210 burns may be inhaled by the user from the first part 210 along the length of the first smoking article 200a through the second part 220, which will be described later.

[0088] For example, the aforementioned medium is not particularly limited and can be any material commonly used in the relevant technical field that can generate ordinary smoke and / or aerosols. Specifically, the aforementioned medium may include tobacco raw materials such as tobacco leaves, tobacco stems, etc., and their processed substances. As more specific examples, the medium may include pulverized tobacco leaves, expanded stems, tobacco shredded fillers (e.g., tobacco leaf shredded fillers, leaf shredded fillers), tobacco sheets (e.g., leaf sheets), etc.

[0089] According to some embodiments of the present invention, the aforementioned medium may further include at least one additive selected from humectants and flavor enhancers. For example, a humectant can maintain the moisture in the medium at an appropriate level, soften the inherent flavor, and enrich the atomization. Furthermore, the aforementioned humectant may include at least one selected from glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. For example, the aforementioned flavor enhancer may be added to enhance the flavor. The aforementioned flavoring may include licorice, sucrose, fructose syrup, isosweet, cocoa, lavender, cinnamon, cardamom, celery, fenugreek, acerola, sandalwood, bergamot, geranium, honey extract, rose oil, vanilla, lemon oil, sweet orange oil, peppermint oil, cinnamon, caraway, cognac, jasmine, chamomile, menthol, cinnamon, ylang-ylang, sage, spearmint, ginger, coriander, clove extract (or clove compounds), or coffee, etc.

[0090] According to the invention, the second part 220 may be a filter tip that performs a filtering function on the flue gas and / or aerosol generated by the first part 210. Specifically, the second part 220 is located downstream of the first part 210 and may be connected to the downstream end of the first part 210.

[0091] The second part 220 according to the invention includes a filter element to perform the above-described filtration function. Specifically, the filter element may include a cigarette filter according to some embodiments of the invention, and more specifically, may include a rolled-up piece of paper 100.

[0092] The packaging paper 250 according to the invention can be arranged in a cylindrical shape on the surface of the paper sheet 100, specifically, it can surround the paper sheet 100. More specifically, the packaging paper 250 can be a filter roll or a tipping paper. For example, if the packaging paper 250 is a filter roll, it can surround the paper sheet 100; if the packaging paper is a tipping paper, it can enclose the filter roll. For example, the packaging paper 250 can include cellulose or dextrin.

[0093] Figure 4 A perspective view of a smoking article according to another embodiment of the present invention is provided. Descriptions repeated above are briefly described or omitted.

[0094] Reference Figure 4 The second smoking article 200b according to the present invention may be another embodiment of the smoking article 200, for example, it may be a combustible cigarette.

[0095] The second smoking article 200b according to the present invention may further include a third portion 230 located between the first portion 210 and the second portion 220. Specifically, the third portion 230 may be arranged on one side of the first portion 210 and on one side of the second portion 220. More specifically, the second smoking article 200b according to the present invention may be arranged sequentially along its length in the order of the first portion 210, the third portion 230, and the second portion 220.

[0096] According to an embodiment of the invention, the third portion 230 can cool the airflow passing through the first portion 210 from the outside of the second smoking article 200b. Specifically, the third portion 230 may include a first cooling element.

[0097] According to one embodiment of the present invention, the first cooling element may be a hollow cylindrical paper tube formed of paper material. Specifically, polylactic acid may be coated on the inner surface of the paper tube. According to some embodiments of the present invention, by coating the inner surface of the paper tube with polylactic acid, the mainstream tobacco smoke and / or aerosol generated by the ignition of the first portion 210 can be cooled more effectively.

[0098] According to another embodiment of the invention, the first cooling element may be formed of a biodegradable polymer material, specifically, it may be formed of polylactic acid fibers.

[0099] According to another embodiment of the present invention, the first cooling element described above may be a cellulose acetate filter.

[0100] The packaging paper 250 according to the invention can surround at least one of the first to third portions 210, 220, 230.

[0101] Figure 5 A perspective view of a smoking article according to another embodiment of the present invention is provided. Descriptions repeated above are briefly described or omitted.

[0102] Reference Figure 5 The third smoking article 200c according to the present invention can be another embodiment of the smoking article 200, for example, it can be a heated cigarette. Specifically, the third smoking article 200c can be a heated cigarette heated by the aerosol generating apparatus described below by external heating or internal heating.

[0103] 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, along the length direction of the third smoking article 200c, the fourth portion 240, the first portion 210, the third portion 230, and the second portion 220 may be arranged side by side in that order. That is, the first portion 210 may be located between the third portion 230 and the fourth portion 240, and the third portion 230 may be located between the first portion 210 and the second portion 220.

[0104] The third smoking article 200c according to the invention may include wrapping paper 250 for covering at least one of the first to fourth parts 210, 220, 230, 240.

[0105] According to an embodiment of the present invention, the fourth portion 240 can be a substrate for generating aerosols. Specifically, the fourth portion 240 may include an aerosol-generating substance. For example, the aerosol-generating substance may include at least one selected from glycerol, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol.

[0106] According to another embodiment of the present invention, at least one of the second part 220 and the fourth part 240 may include a piece of paper according to some embodiments. Specifically, by including a piece of paper according to some embodiments of the present invention in at least one of the second part 220 and the fourth part 240, not only can the functionality of the heated cigarette be maintained, but the biodegradability of the smoking article can also be further improved.

[0107] According to another embodiment of the present invention, one of the second part 220 and the fourth part 240 may include the aforementioned paper sheet, and the other may include a cellulose acetate filter tip. Specifically, the second part 220 may include the aforementioned cellulose acetate filter tip, while the fourth part 240 may include the aforementioned paper sheet. More specifically, the paper sheet of the fourth part 240 may be impregnated with the aforementioned aerosol generating substance. According to some embodiments of the present invention, by including a paper sheet impregnated with an aerosol generating substance in the fourth part 240, the impregnation rate of the aerosol generating substance on the paper sheet can be further improved, thereby better achieving the atomization function.

[0108] According to another embodiment of the present invention, both the second part 220 and the fourth part 240 may include the paper sheet. Specifically, by including paper sheets according to some embodiments of the present invention in the second part 220 and the fourth part 240, the atomization function can be achieved while improving the ability to reduce specific smoke components, and a smoking article with high biodegradability can be provided.

[0109] According to another embodiment of the invention, the fourth portion 240 may include a second cooling element for cooling the atomized material supplied by the liquid cartridge. In this case, the second portion 220 may include a piece of paper according to some embodiments of the 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 formed of paper and may be in the form of a hollow cylindrical paper tube. According to yet another embodiment of the 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 atomized material supplied from the liquid cartridge can be cooled more effectively.

[0110] The third part 230 according to another embodiment of the present invention may include a tubular filter. The tubular filter is a filter through which the atomized material flows, and may be a hollow cellulose acetate filter.

[0111] Figure 6 An aerosol generating apparatus for smoking articles according to an embodiment of the present invention is provided.

[0112] According to one embodiment of the present invention, the aerosol generating device 300 may be a first aerosol generating device 300a.

[0113] Reference Figure 6 According to an embodiment of the present invention, a first aerosol generating apparatus 300a may include a housing (not shown), a heater 330, a control unit 320, and a battery 310. For example, in addition to the components shown, the first aerosol generating apparatus 300a may further include other general or conventional components. Specifically, the first aerosol generating apparatus 300a may include an output module (e.g., a motor, a display) for outputting the device status and / or an input module (e.g., a button) for receiving user input (e.g., a device switch).

[0114] The housing according to the invention can form the appearance of the first aerosol generating device 300a and can form a receiving space for accommodating the third smoking article 200c according to some embodiments of the invention.

[0115] The heater 330 according to the invention can generate smoke and / or aerosol by heating a third smoking article 200c contained in a housing space. The third smoking article 200c, contained in the aforementioned housing space according to some embodiments of the invention, can generate smoke and / or aerosol when heated by the heater. The generated smoke and / or aerosol can be inhaled through the user's mouth.

[0116] exist Figure 6In this diagram, heater 330 is shown as an internal heating type, but this is merely for ease of understanding and can be modified to be an external heating type. For example, the heater 330 described above can be implemented as a resistance heater or an induction heater.

[0117] The control unit 320 according to the present invention can control the overall operation of the first aerosol generating apparatus 300a. 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 generating apparatus 300a. Specifically, the control unit 320 can control the power supplied by the battery 310, the heating temperature of the heater 330, etc. Furthermore, the control unit 320 can confirm the status of each component of the first aerosol generating apparatus 300a, thereby determining whether the first aerosol generating apparatus 300a is in an operable state.

[0118] The control unit 320 according to the present invention can be implemented by at least one processor. The processor can be implemented by a plurality of logic gate arrays, or by a combination of a general-purpose microprocessor and a memory storing a program that can be executed by the microprocessor.

[0119] The battery 310 according to the present invention can supply power for operating the first aerosol generating apparatus 300a. For example, the battery 310 can supply power to the heater 330 or the power required for operating the control unit 320. In addition, the battery 310 can also provide power required for operating electrical components such as displays, sensors, and motors installed on the first aerosol generating apparatus 300a.

[0120] Figure 7 An aerosol generating apparatus for smoking articles according to another embodiment of the present invention.

[0121] Reference Figure 7 According to another embodiment of the present invention, the aerosol generating apparatus 300 may be a second aerosol generating apparatus 300b.

[0122] The second aerosol generating apparatus 300b according to the present invention may further include a vaporizer 340.

[0123] The vaporizer 340 according to the present invention can vaporize a liquid aerosol forming matrix to generate an aerosol. For example, the vaporizer 340 may include a liquid storage tank for storing the liquid aerosol forming matrix, a wick for absorbing the stored liquid, and a liquid evaporation element for evaporating the absorbed liquid. In this case, the liquid vaporization element may be implemented as a heating element, a vibrating element that vaporizes the liquid through ultrasonic vibration, or in other forms. As another example, the vaporizer 340 may not include a wick. The liquid vaporization element of the vaporizer 340 can be controlled by a control unit 320.

[0124] The aerosol generated by the vaporizer 340 can pass through the third smoking article 200c and be inhaled through the user's mouth.

[0125] The heater 330 according to the invention can be arranged in a suitable position to realize an external heating method.

[0126] Embodiments of the invention will be described in more detail below so that those skilled in the art can readily implement them, but this is merely an example and the scope of the invention is not limited to the following.

[0127] [Experimental Example 1: Evaluation of the bulk properties of paper sheets based on the average roughness and water permeability of pulp fibers] Microfibrillated pulp fibers were prepared by dissociating and beating raw pulp from various sources. During the beating process of the raw pulp fibers, the water content was adjusted to the values ​​shown in Table 1 below.

[0128] On the other hand, the bulk of a paper sheet is the thickness of the paper sheet relative to its basis weight (thickness / basis weight). Specifically, in evaluations related to the bulk performance of paper sheets, when it is 2.90 cm... 3 / g or more and 4.0cm 3 When the value is below / g, it is rated as "very excellent"; when it is 2.50cm 3 / g or more and less than 2.90cm 3 When the value is / g, it is rated as "excellent"; when it is 2.20cm 3 / g or more and less than 2.50cm 3 When the weight is / g, the rating is "average".

[0129] In addition, the average roughness of a single fiber was analyzed according to KS M ISO 9184-6.

[0130] [Table 1]

[0131] Referring to Table 1 above, it can be confirmed that the average roughness varies depending on the source of the pulp fibers. As a means to achieve excellent bulk properties of paper sheets, the source of the pulp fibers, whether the raw pulp contains additional recycled fibers, and the degree of beating (the extent of pulping) can all have an impact. Specifically, under the condition that the average roughness of a single fiber is the same, comparing the effect of the degree of beating on the bulk properties of the paper sheets in Example 2 and Example 4, it can be confirmed that the bulk of the paper sheets decreases as the degree of beating increases.

[0132] Under the same filtration degree, from the perspective of the effect of the average roughness of a single fiber on the bulk performance of the paper, by comparing Example 2 and Example 3, it can be confirmed that as the average roughness of a single fiber increases, the bulk of the paper increases, thus resulting in better bulk performance.

[0133] From the perspective of the effect of mixing sub-pulp fibers and recycled fibers on the bulk properties of paper sheets, by comparing Example 1 and Example 2, it can be confirmed that when paper sheets are prepared using a mixture of fibers containing sub-pulp fibers and recycled fibers, the bulk of the paper sheets is further improved.

[0134] From the perspective of the effect of the filterability adjustment range of the mixed fibers on the bulk properties of the paper, by comparing Example 1 and Example 5, it can be confirmed that when preparing paper using a mixed fiber containing both pulp fibers and recycled fibers, the bulk properties of the paper are further improved as the filterability decreases. Therefore, it can be inferred that as the paper contains recycled fibers, the filterability adjustment range required to achieve excellent bulk properties will be further expanded.

[0135] Based on the above experimental results, it can be inferred that the degree to which smoke components can pass smoothly through the paper and the degree of reaction between smoke components and the amine functional groups of chitosan fibers may vary depending on the appropriate porosity and bulk of the paper.

[0136] [Experimental Example 2: Verification Reference Data on the Particulate Removal Capability of Paper Filters Compared to CA Filters] The removal capacity is derived by the following steps: (1) measuring the amount of smoke component migration of a cigarette without a cigarette filter; (2) measuring the amount of smoke component migration of a cigarette with a cigarette filter under the same conditions; (3) calculating the difference between the amount of smoke component migration in (1) and the amount of smoke component migration in (2) above, which is the amount of smoke component removed by the filter; and (4) calculating the ratio of (3) to (1) above, and calculating the removal capacity.

[0137] [Table 2]

[0138] Referring to Table 2 above, it can be confirmed that paper filters have a significantly higher removal capacity for particulate matter, tar, and nicotine compared to cellulose acetate tow filters. The preferred embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto. Various modifications and alterations made by those skilled in the art based on the basic concepts of the invention as defined in the appended claims are also within the scope of the present invention.

[0139] Explanation of reference numerals in the attached figures 10a: Pulp fiber 10b: Chitosan fiber 100: Paper 200: Smoking items 200a: First smoking item 200b: Second smoking item 200c: Third smoking product 210: Part One 220: Part Two 230: Part Three 240: Part Four 250: Wrapping paper 300: Aerosol Generating Device 300a: First aerosol generating device 300b: Second aerosol generating device 310: Battery 320: Control Department 330: Heater 340: Carburetor

Claims

1. A cigarette filter, comprising a paper sheet, characterized in that... The aforementioned paper sheet includes pulp fibers and chitosan fibers. The pulp fibers mentioned above include at least one of single fibers and mixed fibers with an average roughness of 13 mg / 100 m or more.

2. The cigarette filter tip according to claim 1, characterized in that, Based on the total weight of the paper sheets, the content of the single fiber is 50% to 99% by weight.

3. The cigarette filter tip according to claim 1, characterized in that, The aforementioned blended fibers include pulp fibers and recycled fibers.

4. The cigarette filter according to claim 1, characterized in that, Based on the total weight of the paper sheets, the content of the chitosan fiber is 10% to 40% by weight.

5. The cigarette filter tip according to claim 1, characterized in that, The basis weight of the aforementioned paper sheets is 20 gsm to 60 gsm.

6. The cigarette filter according to claim 1, characterized in that, The thickness of the aforementioned paper sheet is 60 μm to 100 μm.

7. The cigarette filter according to claim 1, characterized in that, The bulk of the above-mentioned paper sheet is 2cm. 3 / g to 4cm 3 / g.

8. The cigarette filter according to claim 1, characterized in that, The porosity of the aforementioned paper sheets is 2,000 CU to 30,000 CU.

9. A smoking article, characterized in that, include: The first part includes the medium; and The second part includes the filter element; The aforementioned filter element includes the cigarette filter according to claim 1.

10. The smoking article according to claim 9, characterized in that, It also includes a third part that lies between the first part and the second part mentioned above; The third part mentioned above includes a first cooling element or a tubular filter.

11. The smoking article according to claim 10, characterized in that, It also includes a fourth part arranged on one side of the first part mentioned above; At least one of the above-mentioned second part and the above-mentioned fourth part includes the above-mentioned paper.

12. The smoking article according to claim 11, characterized in that, One of the above-mentioned second part and the above-mentioned fourth part includes the aforementioned paper sheet, and the other includes a cellulose acetate filter tip.

13. The smoking article according to claim 11, characterized in that, The second and fourth parts mentioned above include the aforementioned paper pieces.

14. The smoking article according to claim 11, characterized in that, The fourth part mentioned above includes a second cooling element.

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