Filter for smoking article comprising lyocell tow and smoking article comprising same

Abstract

A filter for a smoking article and a smoking article including the same are provided. The filter for a smoking article comprises: a lyocell tow comprising lyocell fibers; and a phenol reducing substance which is added to the lyocell tow, the phenol reducing substance comprising a polyethyleneglycol; pEG), and the weight average molecular weight of the polyethylene glycol (PEG) is 50 to 2500.

Description

Technical Field

[0001] The present invention relates to a filter tip for a smoking article, in which polyethylene glycol (PEG) is added to a lyocell tow as a phenol-reducing substance, and a smoking article comprising the filter tip. Background Art

[0002] Cigarette filters typically include cellulose acetate tow (tow), which is acetylated and extracted from wood pulp. Furthermore, cigarette filters are assembled into smoking articles, distributed to consumers for smoking, and ultimately discarded after smoking the cigarettes. Furthermore, some cigarette filters may be directly discarded as manufacturing residues by cigarette filter manufacturers. These cigarette filter wastes are recycled as waste and disposed of in landfills. Furthermore, in some cases, cigarette butts after smoking are not recycled as waste, but are instead abandoned in the natural environment.

[0003] Therefore, in recent years, in order to protect the natural environment and reduce costs, research has been conducted to replace cellulose acetate tow with environmentally friendly materials. For example, tow using lyocell fibers, which are obtained by fibrillating cellulose itself, unlike cellulose acetate, has been developed.

[0004] When manufacturing filters for smoking articles, phenolic smoke components in mainstream smoke are reduced by adding a phenol-reducing substance that specifically reduces phenols produced during smoking. Conventionally, phenol-reducing substances such as polyethylene glycol (PEG), triethyl citrate (TEC), and triacetin (TA) are known to be added to cellulose acetate tow. When phenol-reducing substances composed of polyethylene glycol (PEG) and triethyl citrate (TEC) are added to hydrophobic cellulose acetate, they also act as plasticizers on the cellulose acetate fibers, causing them to bind together and reducing biodegradability.

[0005] On the other hand, when phenol-reducing substances such as polyethylene glycol (PEG) and triethyl citrate (TEC) are added to lyocell fibers, the hydrophilic lyocell fibers are not plasticized. Therefore, it was found that when phenol-reducing substances such as polyethylene glycol (PEG) and triethyl citrate (TEC) are added to lyocell fibers, the biodegradability is not reduced and the phenol smoke component in mainstream smoke is reduced.

[0006] On the other hand, when adding phenol-reducing substances to lyocell fibers to reduce the phenol smoke component in mainstream smoke, the phenol-reducing substances need to be optimized to have the best phenol-reducing performance while maintaining the physical properties of the filter used in smoking articles. Summary of the Invention

[0007] Technical issues

[0008] The problem to be solved by the present invention is to provide a filter tip for smoking articles, which is constructed by adding polyethylene glycol (PEG) designed to have an optimal molecular weight to lyocell tow, thereby more effectively removing components such as phenols present in cigarette smoke during smoking and having excellent biodegradability.

[0009] Another problem to be solved by the present invention is to provide a smoking article, which includes a filter tip for the smoking article. The filter tip for the smoking article is formed by adding polyethylene glycol (PEG) designed to have an optimal molecular weight to a lyocell tow, thereby more effectively removing phenols and other components present in cigarette smoke during the smoking process, and has excellent biodegradability.

[0010] The technical problems of the present invention are not limited to the technical problems described above. Through the following description, those skilled in the art can clearly understand other technical problems not mentioned.

[0011] Solutions to the Problem

[0012] According to one embodiment, a filter for a smoking article for solving the above-mentioned problem includes: a lyocell tow comprising lyocell fibers; and a phenol-reducing substance added to the lyocell tow, wherein the phenol-reducing substance includes polyethylene glycol (PEG), and the weight-average molecular weight of the polyethylene glycol (PEG) is 50 to 2500.

[0013] In addition, the weight average molecular weight of the polyethylene glycol (PEG) may be 100 to 2,000.

[0014] In addition, the weight average molecular weight of the polyethylene glycol (PEG) may be 300 to 900.

[0015] In addition, the weight average molecular weight of the polyethylene glycol (PEG) may be 500 to 700.

[0016] In addition, the weight average molecular weight of the polyethylene glycol (PEG) may be 600.

[0017] Furthermore, the content of the phenol-reducing substance may be 1 wt % to 30 wt % or less relative to the weight of the lyocell tow.

[0018] Furthermore, the content of the phenol-reducing substance may be 18 wt % to 22 wt % or less relative to the weight of the lyocell tow.

[0019] In addition, the phenol-reducing substance may further include triethyl citrate (TEC).

[0020] According to one embodiment, a smoking article for solving the other problem mentioned above may include: a smoking material portion; a filter portion; and wrapping paper, wherein the filter portion includes: a lyocell tow containing lyocell fibers; and a phenol-reducing substance added to the lyocell tow, wherein the phenol-reducing substance includes polyethylene glycol (PEG), and the weight average molecular weight of the polyethylene glycol (PEG) is 50 to 2500.

[0021] In addition, the weight average molecular weight of the polyethylene glycol (PEG) may be 100 to 2,000.

[0022] In addition, the weight average molecular weight of the polyethylene glycol (PEG) may be 500 to 700.

[0023] Effects of the Invention

[0024] According to one embodiment, a filter for a smoking article and a smoking article including the same can provide a lyocell filter using lyocell tow to which polyethylene glycol (PEG) is added as a phenol-reducing substance, thereby effectively removing phenols and other components present in cigarette smoke generated during smoking.

[0025] In addition, even if polyethylene glycol (PEG) is added to lyocell tow, polyethylene glycol (PEG) does not act as a plasticizer for hydrophilic lyocell tow, so it is possible to provide a filter for smoking articles that has excellent biodegradability while having phenol reduction performance and a smoking article including the same.

[0026] In addition, by designing the optimal weight-average molecular weight of the phenol-reducing substance added to the lyocell tow, components such as phenols present in the cigarette smoke produced during smoking can be more effectively removed.

[0027] The effects of the technical idea of the present disclosure are not limited to the effects described above, and those skilled in the art can clearly understand other effects not mentioned through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a diagram showing a schematic structure of a smoking article according to an embodiment of the present invention.

[0029] Figure 2 This is a graph showing the results of measuring the hardness of a filter for a smoking article according to the amount of a solution including water added to the filter for a smoking article made using lyocell tow.

[0030] Figure 3 This is a graph showing the results of measuring the hardness of a filter for a smoking article according to the amount of a solution containing polyethylene glycol (PEG) and water added to the filter for a smoking article made of lyocell tow. DETAILED DESCRIPTION

[0031] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The advantages and features of the present disclosure and methods for achieving them can be clarified through the accompanying drawings and the embodiments described in detail below. However, the technical ideas of the present disclosure are not limited to the embodiments described below, and can be implemented in various different forms. The following embodiments are only used to fully disclose the present disclosure so that people with general knowledge in the technical field to which the present disclosure belongs can fully understand the scope of the present disclosure. The technical ideas of the present disclosure are determined by the scope of the claims of the present disclosure.

[0032] When adding reference numerals to components in all drawings, it should be noted that the same reference numerals refer to the same components even when they are shown in different drawings. Furthermore, in the course of describing the present disclosure, if a detailed description of the configuration or function of a related known technology is deemed to obscure the gist of the present disclosure, such detailed description may be omitted.

[0033] Unless otherwise specified, all terms (including technical and scientific terms) used in this specification can be used as meanings that can be commonly understood by persons with general knowledge in the technical field to which this disclosure belongs. In addition, commonly used terms with definitions in dictionaries will not be abnormally or over-interpreted unless they are clearly defined. The terms used in this specification are for the purpose of illustrating the embodiments only and are not intended to limit the present disclosure. In this specification, unless otherwise specified, nouns in the singular also include plural forms.

[0034] In addition, when describing the components of the present disclosure, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only used to distinguish a component from other components, and the nature, order or sequence of the related components are not limited by the terms. It should be understood that if a component is described as being "connected," "coupled," or "linked" to another component, it may mean that the component is not only directly "connected," "coupled," or "linked" to the other component, but also indirectly "connected," "coupled," or "linked" via a third component.

[0035] The terms “include” and / or “comprising” used in the present disclosure specify the presence of stated components, steps, operations and / or elements, but do not preclude the presence or addition of one or more other components, steps, operations and / or elements.

[0036] First, some terms used in this specification will be clarified.

[0037] In this specification, "smoking article" may refer to any product that can be smoked or any product that can provide a smoking experience, regardless of whether it is based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. For example, smoking articles may include smokable articles such as cigarettes, cigars, and cigarillos.

[0038] In this specification, "smoking material" may refer to any type of substance that can be used in a smoking article.

[0039] In this specification, “upstream” or “upstream direction” may refer to a direction away from the mouth of a smoker, and “downstream” or “downstream direction” may refer to a direction toward the mouth of a smoker.

[0040] In this specification, "longitudinal direction" may refer to the direction corresponding to the longitudinal axis of the smoking article.

[0041] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0042] Figure 1 This is a diagram showing a schematic structure of a smoking article according to an embodiment of the present invention.

[0043] Throughout this specification, "smoking article" may refer to an article capable of generating an aerosol, such as a cigarette (cigarette), a cigar, etc. The smoking article may contain an aerosol-generating substance or an aerosol-forming substrate. In addition, the smoking article may include a solid material based on tobacco raw materials, such as reconstituted tobacco, pipe tobacco, reconstituted tobacco, etc. The smoking substance may include volatile compounds.

[0044] Furthermore, throughout the specification, “upstream” or “upstream direction” may refer to a direction away from the mouth of a user who smokes the smoking article 100, and “downstream” or “downstream direction” may refer to a direction toward the mouth of a user who smokes the smoking article 100. Figure 1 In the smoking article 100 shown, the smoking material portion 10 is located upstream or in an upstream direction of the filter portion 20 (or filter, filter portion) for the smoking article.

[0045] Furthermore, although the smoking article 100 is described in this specification as a combustion cigarette, the present invention is not limited thereto. The smoking article 100 may also be a heated cigarette used in conjunction with an aerosol generating device (not shown) such as an electronic cigarette device.

[0046] The present invention relates to a filter tip 20 for a smoking article (or a filter tip portion for a smoking article) arranged in a smoking article 100. According to one embodiment of the present invention, the filter tip 20 for a smoking article includes: a lyocell tow containing lyocell fibers; and a phenol-reducing substance added to the above-mentioned lyocell tow.

[0047] In one embodiment, the phenol-reducing substance corresponds to a substance capable of specifically reducing phenols produced during smoking, and may include at least polyethylene glycol (PEG). In some embodiments, the phenol-reducing substance may further include triethyl citrate (TEC). However, the present invention is not limited thereto, and in addition to polyethylene glycol (PEG), any phenol-reducing functional substance is not limited as long as it is capable of reducing phenols produced during smoking.

[0048] The lyocell fiber is an environmentally friendly fiber made from cellulose extracted from wood pulp. The lyocell tow is a bundle formed by cross-linking adjacent lyocell fibers.

[0049] In some embodiments, the lyocell fiber may have a profiled cross-section. A profiled cross-section is defined as a cross-section that is not circular but includes a plurality of protrusions. For example, a cross-section having a plurality of protrusions extending from a center may be referred to as a profiled cross-section.

[0050] In some embodiments, the lyocell fiber may have a Y-shaped cross-section including three protrusions branching from the center, a cross-shaped cross-section including four protrusions, a star-shaped cross-section including five or more protrusions, or an O-shaped cross-section, but the present invention is not limited thereto.

[0051] In some embodiments, the phenol-reducing substance may be uniformly dispersed in the lyocell tow and distributed throughout the entire area of the lyocell tow constituting the filter of the smoking article. Although the present invention is not limited thereto, the phenol-reducing substance containing at least polyethylene glycol (PEG) may be coated on the surface of the lyocell fibers constituting the lyocell tow. Even if the phenol-reducing substance containing polyethylene glycol (PEG) is coated on the surface of the lyocell fibers, the polyethylene glycol may not act as a plasticizer between the lyocell fibers.

[0052] The filter for smoking articles to which the lyocell tow according to the present invention is applied includes a phenol-reducing substance containing polyethylene glycol (PEG) dispersed on the lyocell tow, so that the phenol-reducing effect occurring during smoking can be excellent compared to the filter for smoking articles to which no phenol-reducing substance is added.

[0053] In some embodiments, the polyethylene glycol (PEG) included in the phenol-reducing substance may have a weight average molecular weight (MW) of 50 to 10,000, 50 to 2,500, 200 to 2,000, 500 to 700, or 600.

[0054] When the phenol-reducing substance dispersed in the lyocell tow includes polyethylene glycol (PEG), the phenol-reducing performance of the filter tip for the smoking article may vary depending on the molecular weight of the polyethylene glycol (PEG). Specifically, when the polyethylene glycol (PEG) dispersed in the lyocell tow has a weight average molecular weight within the above range, the phenol-reducing performance of the filter tip for the smoking article prepared using the lyocell tow may be excellent. Preferably, when the weight average molecular weight of the polyethylene glycol (PEG) dispersed in the lyocell tow is 600, the phenol-reducing performance of the filter tip for the smoking article prepared using the lyocell tow may be the most excellent, but the molecular weight of the polyethylene glycol (PEG) is not limited thereto.

[0055] In some embodiments, when the phenol-reducing substance includes polyethylene glycol (PEG), the content of polyethylene glycol (PEG) relative to the weight of the lyocell tow can be 1 wt% to 30 wt%, 2 wt% to 28 wt%, 4 wt% to 25 wt%, 8 wt% to 24 wt% or less, 13 wt% to 23 wt%, 18 wt% to 22 wt%, 19 wt% to 21 wt%, or 20 wt%. When the phenol-reducing substance includes polyethylene glycol (PEG) within the above content ranges, excellent phenol-reducing performance can be achieved while maintaining the physical properties of the filter tip for the smoking article.

[0056] In some embodiments, a filter for a smoking article comprising a lyocell tow in which a phenol-reducing substance is dispersed has a hardness of 70% or more. In exemplary embodiments, the hardness of the filter for a smoking article may be 70% to 90%, 75% to 90% or more, 80% to 90% or more, 85% to 90%, or 86% to 88%. The hardness of the filter for a smoking article is a value that quantifies the degree to which the diameter of the filter for a smoking article is maintained when the filter for a smoking article is pressed with a certain level of force in a direction perpendicular to the longitudinal direction of the filter for a smoking article. It may be a percentage value of the ratio between the diameter of the filter for a smoking article after the force is applied and the diameter of the filter for a smoking article before the force is applied.

[0057] Hereinafter, the configuration of the present invention and its effects will be described in more detail by way of examples and comparative examples. However, the examples are only used to explain the present invention in more detail, and the scope of the present invention is not limited by these examples.

[0058] Example 1

[0059] Using a filter manufacturing device manufactured by TYM Corporation (the operating mechanism is the same as that of the filter manufacturing device for CA tow), PEG 200 was sprayed onto the lyocell tow at 20 mg / rod and added, and then the lyocell tow dispersed with PEG200 was wrapped with winding paper to prepare a filter for smoking articles with a length of 108 mm, a circumference of 24.2 mm, and a draw resistance of 410 mmH2O.

[0060] Example 2

[0061] A filter for a smoking article was prepared in the same manner as in Example 1, except that PEG 400 was used as the phenol-reducing substance instead of PEG 200.

[0062] Example 3

[0063] A filter for a smoking article was prepared in the same manner as in Example 1, except that PEG 600 was used as the phenol-reducing substance instead of PEG 200.

[0064] Example 4

[0065] A filter for a smoking article was prepared in the same manner as in Example 1, except that PEG 1000 was used as the phenol-reducing substance instead of PEG 200.

[0066] Example 5

[0067] A filter for a smoking article was prepared in the same manner as in Example 1, except that PEG 2000 was used as the phenol-reducing substance instead of PEG 200.

[0068] Comparative Example 1

[0069] A filter for a smoking article was prepared in the same manner as in Example 1, except that no phenol-reducing substance was sprayed onto the lyocell tow.

[0070] Experimental Example 1: Evaluation of Phenol Reduction Performance Based on Molecular Weight of Polyethylene Glycol (PEG)

[0071] Smoking articles were prepared using the filter tips for smoking articles of Comparative Example 1 and Examples 1 to 5. Smoke components were collected using a Cambridge filter pad (CFP) using a HAUNI LX20 manual (Linear type) cigarette smoking machine as a smoking device. To extract the substances in the collected pad, 30 mL of 1% acetic acid was added, followed by stirring. The mixture was then filtered through a 0.45 μm PVDF syringe filter. The smoke components of each filter tip for smoking articles were analyzed for phenol using a Waters Alliance HPLC-FLD analyzer. The results are shown in Table 1 below.

[0072] Table 1

[0073]

[0074] As shown in Table 1, the amount of phenol component migration was reduced in Examples 1 to 5, prepared using Lyocell tow in which a phenol-reducing substance containing PEG was dispersed, compared to Comparative Example 1, in which no phenol-reducing substance was dispersed in the Lyocell tow. Specifically, Examples 1 to 5 were found to reduce the amount of phenol or cresol migration to 50% or less compared to Comparative Example 1. Furthermore, it was confirmed that the phenol component reduction effect varied depending on the molecular weight of PEG contained in the phenol-reducing substance. Specifically, Example 3, containing PEG 600, was found to significantly reduce the amount of phenol or cresol migration compared to Comparative Example 1 and Examples 1, 2, 4, and 5.

[0075] Example 6

[0076] Using a filter manufacturing machine manufactured by TYM Corporation (the operating mechanism is the same as that for CA tow), 3 wt% of PEG 600 relative to the weight of the lyocell tow was sprayed onto the lyocell tow and added, and then wrapped with rolling paper to prepare a filter for a smoking article.

[0077] Example 7

[0078] A filter for a smoking article was prepared in the same manner as in Example 6, except that the amount of PEG 600 included in the phenol-reducing substance added was 8 wt% instead of 3 wt% relative to the weight of the lyocell tow.

[0079] Example 8

[0080] A filter for a smoking article was prepared in the same manner as in Example 6, except that the amount of PEG 600 included in the phenol-reducing substance added was 13 wt% instead of 3 wt% relative to the weight of the lyocell tow.

[0081] Example 9

[0082] A filter for a smoking article was prepared in the same manner as in Example 6, except that the amount of PEG 600 included in the phenol-reducing substance added was 20 wt% instead of 3 wt% relative to the weight of the lyocell tow.

[0083] Example 10

[0084] A filter for a smoking article was prepared in the same manner as in Example 6, except that the amount of PEG 600 included in the phenol-reducing substance added was 30 wt% instead of 3 wt% relative to the weight of the lyocell tow.

[0085] Comparative Example 2

[0086] A filter for a smoking article was prepared in the same manner as in Example 6, except that the phenol-reducing substance was not sprayed onto the lyocell tow.

[0087] Experimental Example 2: Evaluation of phenol reduction performance according to polyethylene glycol (PEG) content

[0088] Smoking articles were prepared using the filters for smoking articles of Comparative Example 2 and Examples 6 to 9. Smoke components were collected using a Cambridge filter pad (CFP) using a HAUNI LX20 manual (Linear type) cigarette smoking machine as a smoking device. To extract the substances in the collected pad, 30 mL of 1% acetic acid was added, followed by stirring. The mixture was then filtered through a 0.45 μm PVDF syringe filter. The smoke components of each filter for smoking article were analyzed for phenol using a Waters Alliance HPLC-FLD analyzer. The results are shown in Table 2 below.

[0089] Table 2

[0090]

[0091] As shown in Table 2, compared to Comparative Example 2, in which no phenol-reducing substance was dispersed in the Lyocell tow, Examples 6 to 9, prepared using Lyocell tow in which a phenol-reducing substance containing PEG 600 was dispersed, showed reduced amounts of phenol component migration. Furthermore, it was confirmed that the phenol-reducing effect differed depending on the amount of PEG 600 contained in the phenol-reducing substance. Specifically, it was confirmed that in Examples 9 and 10, which contained 20% and 30% by weight of PEG 600 relative to the Lyocell tow, the amount of phenol or cresol component migration was significantly reduced compared to Comparative Example 2 and Examples 6 to 8.

[0092] On the other hand, it was confirmed that when a filter for a smoking article is prepared using Lyocell tow in which a phenol-reducing substance containing PEG is dispersed, phenol-reducing performance improves with increasing PEG content. However, if the PEG content is too high, the phenol-reducing substance transfers to the filter wrapping paper, causing wetting of the filter wrapping paper or ink bleeding, thereby reducing the quality of the filter for the smoking article. Therefore, it was confirmed that Example 9, which contained 20% by weight of PEG 600 relative to the Lyocell tow, exhibited the most excellent phenol-reducing performance while maintaining the physical properties of the filter for the smoking article.

[0093] Preparation Example 1

[0094] A filter for a smoking article was prepared by wrapping a lyocell tow containing lyocell fibers with a general porous paper having a basis weight of 21 gsm and then injecting a solution containing water into the lyocell fibers.

[0095] Preparation Example 2

[0096] A filter for a smoking article was prepared by wrapping a lyocell tow containing lyocell fibers with a general porous paper having a basis weight of 21 gsm, and then injecting a solution containing PEG and water into the lyocell fibers.

[0097] Experimental Example 3: Evaluation of Hardness of Filters for Smoking Articles Based on the Application of Polyethylene Glycol (PEG)

[0098] Except for preparing the filter tip for smoking articles by changing the addition amount of the solution injected into the lyocell tow, the filter tip for smoking articles was prepared in the same manner as the above-mentioned Preparation Example 1 and Preparation Example 2, and the hardness of the prepared filter tip for smoking articles was evaluated.

[0099] [Calculation formula 1]

[0100] Filter hardness (%) = [Da] / D×100

[0101] Where D is the diameter of the filter (mm), and a represents the distance (mm) that a 300g hammer descends (presses the filter). The measurement values required for calculating the hardness of the cigarette filter can be obtained using a commonly used device in the art, for example, the DHT 200 manufactured by Filtrona. TM When measuring hardness, the force applied takes into account the force actually exerted by a smoker holding a cigarette. The 85% or greater hardness value achieved by the cigarette filter according to one embodiment of the present invention is technically significant in that it utilizes lyocell tow, an environmentally friendly material, to ensure a level of hardness that can replace existing cigarette filters (made of cellulose acetate).

[0102] Specifically, when the solution injected into the lyocell tow contained water, the hardness of the filter for the smoking article according to the amount of solution added was measured and shown in FIG. Figure 2 In the graph of FIG. 1 , when the solution injected into the lyocell tow contains water and PEG, the hardness of the filter for the smoking article according to the amount of solution added is measured and shown in FIG. Figure 3 in the curve diagram.

[0103] Reference Figure 2 It was confirmed that when water was injected into a filter for a smoking article using a lyocell tow, the hardness of the filter decreased linearly with increasing water volume. This is because when water (moisture) penetrates into the lyocell fibers constituting the hydrophilic lyocell tow or between the lyocell fiber structures, the lyocell fiber structure changes due to external forces, resulting in a decrease in the hardness of the filter for the smoking article.

[0104] Reference Figure 3It was confirmed that when a solution containing PEG and water was injected into a smoking filter using lyocell tow, the hardness of the smoking filter remained at 86% to 88% even when the amount of injected solution increased. Therefore, in the case of the smoking filter according to the present invention, even if PEG, a phenol-reducing substance, is dispersed in the lyocell tow, the hardness of the smoking filter does not decrease, thereby achieving excellent phenol-reducing performance while maintaining the physical properties of the smoking filter.

[0105] Furthermore, it was confirmed that when using lyocell fibers to produce a filter having a length of 60 mm, a circumference of 24.2 mm, and a draw resistance of 240 mmH2O, a larger amount of PEG than that added to the lyocell fibers was required in the paper compared to when using paper. In other words, compared to paper, a smaller amount of PEG was required to achieve the same draw resistance in lyocell fibers. Therefore, the amount of phenol-reducing substances used to produce the filter for smoking articles was reduced, thereby reducing manufacturing costs.

[0106] The above-mentioned filter for smoking articles can be applied to smoking articles. Figure 1 1 is a diagram illustrating a schematic structure of a smoking article according to a specific embodiment of the present invention. The smoking article 100 includes a smokeless material portion 10 and a filter portion 20. The filter for smoking articles described above can be applied to the filter portion 20 of the smoking article 100. In the smoking article 100, the smokeless material portion 10 is located upstream of the filter portion 20.

[0107] The smoking material portion 10 may be filled with smoking materials such as raw tobacco leaves, reconstituted tobacco leaves, or a mixture of tobacco leaves and reconstituted tobacco leaves. The processed smoking material may be filled into the smoking material portion 10 in the form of thin sheets or pipe tobacco shreds. The smoking material portion 10 may have an elongated, long rod shape. There are no particular restrictions on its length, circumference, and diameter, but it may be adjusted to dimensions commonly used in the art based on the amount of smoking material filled, user preferences, and the like. The smoking material portion 10 may include at least one aerosol-forming substance selected from the group consisting of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. The smoking material portion 10 may contain other additives such as flavorings, wetting agents, and / or acetate compounds. The aerosol-forming substance and additives may be contained in the smoking material.

[0108] The filter portion 20 is located downstream of the smoking material portion 10 so as to function as a filter that passes through the aerosol material generated in the smoking material portion 10 before the user inhales it. The above-mentioned filter portion 20 can be made of various materials or shapes. According to a specific embodiment of the present invention, the filter portion 20 basically includes the above-mentioned cigarette filter of lyocell tow in which multiple lyocell fibers are bonded by an adhesive. The above-mentioned cigarette filter including lyocell tow can replace all or part of the filter portion 20 of an existing smoking article. When replacing a part, the filter material used in the past can be used together. Existing filter materials may include, for example, cellulose acetate filters, hollow tube filters, etc.

[0109] although Figure 1 The middle filter portion 20 is shown as a single filter consisting of a single filter, but the present invention is not limited thereto. For example, the filter portion 20 may be configured as a double filter or triple filter having two or more filters to improve filtration efficiency.

[0110] In some embodiments, when the filter portion 20 is configured as a double filter or a triple filter, any one of the plurality of filters may be adapted to be a filter (hereinafter referred to as a lyocell filter) comprising a lyocell tow containing lyocell fibers and a phenol-reducing substance dispersed in the lyocell tow, while another of the plurality of filters may be adapted to be a cellulose acetate filter and / or a paper filter. In this case, the length of the lyocell filter of the present invention may be 25% to 50% of the total length of the filter portion 20. In addition, although not shown in the figures, a crushable capsule (not shown) may be included inside the filter portion 20, the capsule having a structure in which a content solution containing a fragrance is surrounded by a membrane.

[0111] The exterior of the smoking material portion 10 and the filter portion 20 may be wrapped with a wrapping paper 30a or 30b.

[0112] The smoking material portion 10 can be wrapped in a smoking material portion wrapper 30a. A portion of the cigarette smoke generated during the combustion of the smoking material portion 10 is typically released into the atmosphere through the smoking material portion wrapper 30a before passing through the cigarette filter. This sidestream smoke causes discomfort to secondhand smokers. Various attempts have been made to reduce this sidestream smoke, such as by adding fillers such as magnesium oxide, titanium oxide, cerium oxide, aluminum oxide, calcium carbonate, and zirconium carbonate to existing cigarette paper. However, simply using these fillers to reduce sidestream smoke can lead to problems such as a reduced smoking sensation, extinguished combustion, and reduced ash integrity. Therefore, it is difficult to address these issues by appropriately combining filler materials. In some specific embodiments, to reduce sidestream smoke while preventing a reduction in smoking sensation, reduced ash integrity, and extinguished combustion, the smoking material portion wrapper 30a can be a filler composed of a mixture of magnesium oxide (MgO and / or Mg(OH)2) and calcium carbonate (CaCO3).

[0113] The filter 20 may be wrapped by a filter wrapper 30b. The filter wrapper 30b may be made of oil-resistant paper, and the inner side of the filter wrapper 30b may further include aluminum foil.

[0114] The smoking material portion 10 wrapped by the smoking material portion wrapping paper 30a and the filter portion 20 wrapped by the filter portion wrapping paper 30b can be combined and wrapped by the tipping paper 40. The tipping paper 40 can be wrapped around the Figure 1 The smoking material portion wrapper 30a shown in FIG. 1 is wrapped around at least a portion (e.g., a portion of the downstream area) of the smoking material portion wrapper 30a and the periphery of the filter portion wrapper 30b. In other words, at least a portion of the smoking material portion 10 and the filter portion 20 may be further wrapped with tipping paper 40 to physically bond them together. In one embodiment of the present invention, the tipping paper 40 may be made of non-porous wrapping paper that has not undergone oil-resistant treatment, but the present invention is not limited to this. Furthermore, the tipping paper 40 may also include a non-combustible material to prevent the filter portion 20 from burning, but the present invention is not limited to this.

[0115] In addition, although not shown in the figures, the smoking article 100 may further include a hollow tube structure, which is a tubular structure having a hollow interior. The hollow tube structure may be located downstream of the lyocell filter.

[0116] In some embodiments, the hollow tube structure may be provided with perforations, but the present invention is not limited thereto. The hollow tube structure may not be provided with perforations.

[0117] In some embodiments, when perforations are formed in the hollow tube structure, the perforations may be formed at a distance of 10 mm to 15 mm in the upstream direction from the downstream end of the smoking article 100 .

[0118] Although the embodiments of the present disclosure have been described above with reference to the accompanying drawings, those skilled in the art with common sense in the art to which the present disclosure pertains will appreciate that the present disclosure may be implemented in other specific forms without changing the technical concepts or essential features of the present disclosure. Therefore, it should be understood that the above embodiments are illustrative and non-restrictive in all respects. The scope of protection of the present disclosure shall be determined by the claims, and all interpretations of the technical spirit within the scope of equivalents shall fall within the scope of the technical concepts defined by the present disclosure.

Claims

1. A filter tip for a smoking article, characterized in that: include: Lyocell tow comprising lyocell fibers; and Phenol-reducing substances, added to the above lyocell tow, The above-mentioned phenol-reducing substances include polyethylene glycol, The weight average molecular weight of the polyethylene glycol is 50 to 2500.

2. The filter tip for a smoking article according to claim 1, wherein The weight average molecular weight of the polyethylene glycol is 100 to 2000.

3. The filter tip for a smoking article according to claim 2, characterized in that The weight average molecular weight of the polyethylene glycol is 300 to 900.

4. The filter tip for a smoking article according to claim 3, characterized in that The weight average molecular weight of the polyethylene glycol is 500 to 700.

5. The filter tip for a smoking article according to claim 4, characterized in that The weight average molecular weight of the polyethylene glycol is 600.

6. The filter tip for a smoking article according to claim 1, wherein The content of the phenol-reducing substance is 1 wt % to 30 wt % relative to the weight of the lyocell tow.

7. The filter for smoking articles according to claim 6, characterized in that The content of the phenol-reducing substance is 18 wt % to 22 wt % relative to the weight of the lyocell tow.

8. The filter tip for a smoking article according to claim 1, wherein The phenol-reducing substance further includes triethyl citrate.

9. A smoking article, characterized in that include: Department of Smoking Substances; filter tip; and wrapping paper, The filter portion includes: Lyocell tow comprising lyocell fibers; and Phenol-reducing substances, added to the above lyocell tow, The above-mentioned phenol-reducing substances include polyethylene glycol, The weight average molecular weight of the polyethylene glycol is 50 to 2500.

10. The smoking article according to claim 9, characterized in that The weight average molecular weight of the polyethylene glycol is 100 to 2000.

11. The smoking article according to claim 10, characterized in that The weight average molecular weight of the polyethylene glycol is 500 to 700.

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