Lyocell tow-containing smoking article filter and smoking article containing the same

Abstract

A smoking article filter and a smoking article are provided. The smoking article filter includes lyocell tow containing lyocell fibers and a phenol-reducing substance dispersed in the lyocell tow, the phenol-reducing substance including triethyl citrate (TEC), and the content of the triethyl citrate per mm of the lyocell tow is 0.11 mg to 1.85 mg.

Description

[Technical Field]

[0001] The present invention relates to a smoking article filter in which triethyl citrate (TEC) is added to lyocell tow as a phenol-reducing substance, and to a smoking article including the same. [Background technology]

[0002] A typical cigarette filter contains cellulose acetate tow, which is made by extracting cellulose from wood pulp and acetylating it. Cigarette filters are assembled into tobacco products, distributed to consumers, provided for smoking, and ultimately discarded after the cigarette is smoked. Some cigarette filters are also discarded directly from cigarette filter manufacturing plants as manufacturing residue. These cigarette filter wastes are collected as garbage and buried for disposal. In some cases, cigarettes are left in the natural environment without being collected as garbage.

[0003] For this reason, research has been conducted recently to replace cellulose acetate tow with eco-friendly materials in order to protect the natural environment and reduce costs. For example, unlike cellulose acetate, tow using lyocell fiber (i.e., lyocell tow) is being developed, which is made by fiberizing cellulose itself.

[0004] When manufacturing smoking article filters, phenol-reducing substances that specifically reduce phenols generated during smoking are added to reduce phenol smoke components in mainstream smoke. Conventional phenol-reducing substances, such as polyethylene glycol (PEG), triethyl citrate (TEC), and TA, are known to be added to cellulose acetate tow. When phenol-reducing substances, such as polyethylene glycol (PEG) and triethyl citrate (TEC), are added to hydrophobic cellulose acetate, the phenol-reducing substances also function as plasticizers for the cellulose acetate fibers, bonding the hydrophobic cellulose acetate fibers together and reducing biodegradability.

[0005] Furthermore, when phenol-reducing substances such as polyethylene glycol (PEG) and triethyl citrate (TEC) are added to lyocell fiber, the hydrophilic lyocell fiber does not plasticize. This has led to the discovery that adding phenol-reducing substances such as polyethylene glycol (PEG) and triethyl citrate (TEC) to lyocell fiber does not reduce biodegradability, but does reduce phenolic smoke components in mainstream smoke.

[0006] Furthermore, when adding a phenol-reducing substance to lyocell fiber to reduce phenolic smoke components in mainstream smoke, it is necessary to optimally design a phenol-reducing substance that has the best phenol-reducing performance while maintaining the physical properties of the smoking article filter. Summary of the Invention [Problem to be solved by the invention]

[0007] The problem to be solved by the present invention is to provide an excellent biodegradable smoking article filter that more effectively removes components such as phenols present in tobacco smoke during smoking by adding an optimally designed amount of triethyl citrate (TEC) to lyocell tow to form a smoking article filter.

[0008] Another problem to be solved by the present invention is to provide a smoking article including an excellent biodegradable smoking article filter, which more effectively removes components such as phenols present in tobacco smoke during smoking by adding triethyl citrate (TEC) designed at an optimal content to lyocell tow to form a smoking article filter. [Means for solving the problem]

[0009] According to one embodiment for solving the above problem, a filter for smoking articles includes lyocell tow containing lyocell fibers and a phenol-reducing substance dispersed in the lyocell tow, wherein the phenol-reducing substance includes triethyl citrate (TEC), and the content of the triethyl citrate is 0.11 mg to 1.85 mg per length (mm) of the lyocell tow.

[0010] In some embodiments, the content of triethyl citrate is 0.18 mg to 1.2 mg per mm of the length of the lyocell tow.

[0011] In some embodiments, the content of triethyl citrate is 0.5 mg to 0.95 mg per mm of the length of the lyocell tow.

[0012] In some embodiments, the content of triethyl citrate is 0.6 mg to 0.85 mg per mm of the length of the lyocell tow.

[0013] In some embodiments, the hardness of the smoking article filter may be 70% to 95%.

[0014] In some embodiments, the lyocell fibers may have a modified cross section.

[0015] According to one embodiment of the present invention, a smoking article includes a smoking material portion, a filter portion disposed downstream of the smoking material portion, and a wrapper enclosing the smoking material portion or the filter portion, wherein the filter portion includes lyocell tow containing lyocell fiber and a phenol-reducing substance dispersed in the lyocell tow, the phenol-reducing substance including triethyl citrate (TEC), and the content of the triethyl citrate is 0.11 mg to 1.85 mg per mm of the length of the lyocell tow.

[0016] In some embodiments, the content of triethyl citrate is 0.6 mg to 0.85 mg per mm of the length of the lyocell tow.

[0017] In some embodiments, the lyocell fibers may have a modified cross section.

[0018] In some embodiments, the filter portion may further include a capsule capable of generating a flavor. [Effects of the Invention]

[0019] According to one embodiment of a filter for smoking articles and a smoking article including the same, a lyocell filter can be provided that uses lyocell tow to which triethyl citrate (TEC) has been added as a phenol-reducing substance, thereby more effectively removing components such as phenols present in tobacco smoke during smoking.

[0020] Furthermore, although triethyl citrate (TEC) is added to the lyocell tow, the triethyl citrate (TEC) does not act as a plasticizer for the hydrophilic lyocell tow, and therefore it is possible to provide a smoking article filter that has phenol reduction properties and excellent biodegradability, and smoking articles that include the same.

[0021] In addition, by designing the optimal content of triethyl citrate (TEC) added to lyocell tow, it is possible to more effectively remove components such as phenols present in tobacco smoke during smoking.

[0022] The effects of the technical idea of ​​the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a smoking article according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] 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, as well as methods for achieving them, will become apparent from the following detailed description of the embodiments in conjunction with the accompanying drawings. However, the technical idea of ​​the present disclosure is not limited to the following embodiments and can be embodied in various different forms. The following embodiments are merely provided to complete the technical idea of ​​the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art to which the present disclosure pertains. The technical idea of ​​the present disclosure is only defined by the scope of the claims.

[0025] When assigning reference numerals to components in each drawing, it should be noted that the same components are assigned the same numerals as much as possible even if they are displayed in different drawings. Furthermore, when describing the present disclosure, if it is determined that a detailed description of related known configurations or functions may obscure the gist of the present disclosure, the detailed description thereof will be omitted.

[0026] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in a manner commonly understood by those skilled in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not idealized or overly interpreted unless expressly defined otherwise. The terms used herein are intended to describe the embodiments and are not intended to limit the present disclosure. In this specification, the singular form includes the plural form unless otherwise specified in the text.

[0027] Furthermore, when describing components of the present disclosure, terms such as first, second, A, B, (a), (b), etc. may be used. Such terms are merely used to distinguish the component from other components, and do not limit the nature, procedure, or order of the components. When a component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the component may be directly coupled or connected to the other component, but that other components may also be "coupled," "coupled," or "connected" between the components.

[0028] As used in this disclosure, "comprises" and / or "comprising" means that a referenced component, step, operation and / or element does not exclude the presence or addition of one or more other components, steps, operations and / or elements.

[0029] First, some clarifications regarding terms used in this specification.

[0030] As used herein, "smoking article" may refer to any product that can be smoked or that can provide a smoking experience, whether based on tobacco, a tobacco derivative, expanded tobacco, reconstituted tobacco, or a tobacco substitute. For example, smoking articles may include smokable products such as cigarettes, cigars, and cigarillos.

[0031] As used herein, "smoking material" may refer to any type of substance that can be used in smoking articles.

[0032] As used herein, "upstream" or "upstream direction" may mean a direction away from the mouth of the smoker, and "downstream" or "downstream direction" may mean a direction toward the mouth of the smoker.

[0033] As used herein, "longitudinal direction" may mean the direction corresponding to the longitudinal axis of the smoking article.

[0034] Various embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.

[0035] FIG. 1 is a diagram showing a schematic configuration of a smoking article according to one embodiment of the present invention.

[0036] Throughout the specification, "smoking article" may refer to an article capable of generating an aerosol, such as a cigarette, a cigar, etc. Smoking articles may include an aerosol-generating substance or an aerosol-forming substrate. Smoking articles may also include solid substances based on tobacco, such as flat tobacco, shredded tobacco, or reconstituted tobacco. Smoking substances may include volatile compounds.

[0037] Additionally, throughout the specification, "upstream" or "upstream direction" refers to a direction away from the mouth of a user smoking the smoking article 1, and "downstream" or "downstream direction" refers to a direction toward the mouth of a user smoking the smoking article 1. For example, in the smoking article 1 shown in Figure 1, the smoking material portion 10 is located upstream or in the upstream direction of the smoking article filter portion 20 (or smoking article filter, filter portion).

[0038] Furthermore, although the present specification has given an example in which the smoking article 1 is a combustible cigarette, the smoking article 1 is not limited to this, and may also be a heated cigarette used in conjunction with an aerosol generating device (not shown), such as an electronic cigarette device.

[0039] The present invention relates to a smoking article filter 20 (or a smoking article filter portion, filter part) included in a smoking article 1, and the smoking article filter 20 according to one embodiment of the present invention includes lyocell tow containing lyocell fiber and a phenol-reducing substance added to the lyocell tow, and the phenol-reducing substance includes triethyl citrate (TEC).

[0040] The "phenol" may refer to a group of chemical compounds composed of a hydroxyl group (-OH) directly bonded to an aromatic hydrocarbon functional group, and the phenol group includes phenol, catechol, m+P cresol, and o-cresol. The "phenol-reducing substance" may correspond to a substance that can specifically reduce at least one of phenolic substances, such as phenol, catechol, m+P cresol, and o-cresol, in smoke generated during smoking.

[0041] 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.

[0042] In some embodiments, the lyocell fiber may have a non-circular cross section. A non-circular cross section is defined as a cross section that is not circular but has multiple protrusions. For example, a cross section having multiple protrusions extending from the center can be considered a non-circular cross section.

[0043] In some embodiments, the lyocell fiber may have, but is not limited to, a Y-shaped cross section with three protrusions branching out from the center, a cross-shaped cross section with four protrusions, a star-shaped cross section with five or more protrusions, or an O-shaped cross section.

[0044] 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 that constitutes the smoking article filter. The phenol-reducing substance including triethyl citrate (TEC) may be applied to the surface of the lyocell fibers that constitute the lyocell tow.

[0045] The phenol-reducing substance including triethyl citrate (TEC) may be dispersed on the lyocell tow by any method. In some embodiments, the phenol-reducing substance including triethyl citrate (TEC) may be dispersed on the lyocell tow by applying it to the lyocell tow using a spray method, for example, a transfer jet nozzle system (TJNS). However, without being limited thereto, the phenol-reducing substance including triethyl citrate (TEC) may also be dispersed on the lyocell tow using a brush method. This allows for the production of a smoking article filter including lyocell tow in which the phenol-reducing substance including triethyl citrate (TEC) is dispersed, without the need to add or modify additional manufacturing equipment.

[0046] In the smoking article filter according to the present invention, even though a phenol-reducing substance containing triethyl citrate (TEC) is applied to the surface of the lyocell fiber, the triethyl citrate (TEC) may not act as a plasticizer between the lyocell fibers. Therefore, even when triethyl citrate (TEC) is added to the lyocell tow as a phenol-reducing substance, the lyocell fibers contained in the smoking article filter are not substantially connected to each other, and the biodegradability of the smoking article filter may not be reduced. In other words, an additive for binding the lyocell fibers together may not be included in the smoking article filter according to the present invention.

[0047] The smoking article filter using the lyocell tow according to the present invention contains a phenol-reducing substance including triethyl citrate (TEC) dispersed on the lyocell tow, and is therefore more effective at reducing phenols generated during smoking than smoking article filters that do not contain triethyl citrate (TEC).

[0048] In some embodiments, the content of triethyl citrate (TEC) dispersed on the lyocell tow may be 3 mg / rod to 50 mg / rod, 4 mg / rod to 40 mg / rod, 5 mg / rod to 30 mg / rod, 8 mg / rod to 29 mg / rod, 10 mg / rod to 28 mg / rod, 12 mg / rod to 27 mg / rod, or 15 mg / rod to 25 mg / rod, preferably 18 mg / rod to 22 mg / rod. This range of triethyl citrate (TEC) content may be suitable for a lyocell filter having a diameter of 7.71 mm, a circumference of 24.20 mm, and a length of 27 mm. When triethyl citrate (TEC) is dispersed on the lyocell tow within this range, the physical properties of the smoking article filter are maintained and the phenol reduction performance is excellent.

[0049] In some embodiments, the content of triethyl citrate (TEC) dispersed on the lyocell tow may be 0.11 mg to 1.85 mg, 0.18 mg to 1.2 mg, or 0.5 mg to 0.95 mg, preferably 0.6 mg to 0.85 mg per mm of lyocell tow length. When triethyl citrate (TEC) is dispersed on the lyocell tow within the above range, the physical properties of the smoking article filter are maintained and the phenol reduction performance is excellent.

[0050] In some embodiments, triethyl citrate (TEC) dispersed on lyocell tow may be added at 0.1% to 15% by weight of the lyocell tow weight.

[0051] In some embodiments, the mono denier of the lyocell fibers constituting the lyocell tow can satisfy the ranges of 2 to 6, 2.3 to 5, 2.5 to 4.5, 2.7 to 4, 3 to 3.5, or 3.1 to 3.4.

[0052] In some embodiments, the total denier of the lyocell fibers constituting the lyocell tow can satisfy the range of 15,000 to 50,000, 25,000 to 48,000, 30,000 to 45,000, or 35,000 to 40,000.

[0053] In some embodiments, a smoking article filter including lyocell tow having a phenol-reducing substance, including triethyl citrate (TEC), dispersed therein may have a resistance to draw in the range of 50 mmWG / 27 mm to 150 mmWG / 27 mm, 60 mmWG / 27 mm to 140 mmWG / 27 mm, 70 mmWG / 27 mm to 130 mmWG / 27 mm, 80 mmWG / 27 mm to 120 mmWG / 27 mm, or 100 mmWG / 27 mm. Without being limited thereto, the lyocell tow included in a smoking article filter having a resistance to draw within the above numerical ranges may have a weight of 700 mg / 108 mm.

[0054] In some embodiments, the hardness of a smoking article filter containing lyocell tow in which a phenol-reducing substance, including triethyl citrate (TEC), has been dispersed may be 60% to 98%, 65% to 97%, or 70% to 95%. The hardness of the smoking article filter is a numerical value that quantifies the degree to which the diameter of the smoking article filter is maintained when the smoking article filter is pressed with a constant level of force in a direction perpendicular to the length of the smoking article filter, and can be expressed as a percentage value as the ratio of the diameter of the smoking article filter after the force has been applied to the diameter of the smoking article filter before the force has been applied. Specifically, the hardness of a smoking article filter is measured using the following Equation 1:

[0055] [Formula 1]

[0056] Hardness of smoking article filter (%) = a / D*100

[0057] (D is the diameter of the smoking article filter, and a is the diameter of the smoking article filter after being pressed by a weight for a set time.)

[0058] A smoking article filter comprising lyocell tow according to one embodiment of the present invention and triethyl citrate (TEC) dispersed in the lyocell tow in a predetermined content range can reduce the amount of phenolic substances transferred in smoke passing through the filter compared to a smoking article filter comprising lyocell tow in which triethyl citrate (TEC) is not dispersed. The amount of phenolic substances transferred in smoke passing through the smoking article filter according to one embodiment of the present invention can be reduced by 20% to 55%, 25% to 52%, or 45% to 50% compared to the amount of phenolic substances transferred in smoke passing through a smoking article filter using lyocell tow in which triethyl citrate (TEC) is not dispersed.

[0059] In some embodiments, the smoking article filter may further include a capsule capable of generating a flavor. Specifically, the smoking article filter may further include a crushable capsule disposed inside the lyocell tow and having a coating structure enclosing an oral liquid containing a flavoring. At least one crushable capsule may be included inside the lyocell tow in which triethyl citrate (TEC) is dispersed.

[0060] In some embodiments, the smoking article filter may further comprise a wrapper (or filter portion wrapper) enclosing lyocell tow in which triethyl citrate (TEC) is dispersed. -2 It may have the following basis weights, but is not limited to these:

[0061] The present invention will be described in more detail with reference to the following examples and comparative examples. However, these examples are provided to more specifically describe the present invention, and the scope of the present invention is not limited to these examples.

[0062] Example 1

[0063] Using a HAUNI KDF-2 device, triethyl citrate (TEC) was added to lyocell tow at 5 mg / rod, and the lyocell tow with dispersed triethyl citrate (TEC) was then wrapped in wrapping paper to produce a smoking article filter that met the following requirements: length 27 mm, diameter 7.71 mm, and draw resistance 400 mmWG / 108 mm.

[0064] Example 2

[0065] A smoking article filter was manufactured in the same manner as in Example 1, except that the amount of triethyl citrate (TEC) added to the lyocell tow was 10 mg / rod instead of 5 mg / rod.

[0066] Example 3

[0067] A smoking article filter was manufactured in the same manner as in Example 1, except that the amount of triethyl citrate (TEC) added to the lyocell tow was 20 mg / rod instead of 5 mg / rod.

[0068] Example 4

[0069] A smoking article filter was manufactured in the same manner as in Example 1, except that the amount of triethyl citrate (TEC) added to the lyocell tow was 30 mg / rod instead of 5 mg / rod.

[0070] Comparative Example 1

[0071] A smoking article filter was produced in the same manner as in Example 1, except that triethyl citrate (TEC) was not added to the lyocell tow as a phenol-reducing substance.

[0072] Experimental Example 1: Evaluation of phenol reduction performance depending on the content of triethyl citrate (TEC)

[0073] Smoking articles were manufactured using the smoking article filters of Comparative Example 1 and Examples 1 to 4. The smoking conditions were HC conditions (puff volume: 55 ml / puff frequency: 30 seconds / puff duration: 2 seconds / vent blocking) using a HAUNI LX20 manual (Linear type) cigarette smoking machine. Smoke components were collected using a Cambridge filter pad (CFP). 30 mL of 1% acetic acid was added to the collected pad to extract substances, followed by stirring and filtering through a 0.45 μm PVDF syringe filter. Phenol-like smoke components in the smoke that passed through each smoking article filter were measured and analyzed using a Water's Alliance HPLC-FLD analyzer. The results are shown in Table 1 below.

[0074] [Table 1]

[0075] As shown in Table 1, Examples 1 to 4, which were produced using lyocell tow in which triethyl citrate (TEC) was dispersed, showed a reduced amount of migration of phenolic components compared to Comparative Example 1, in which triethyl citrate (TEC) was not dispersed in the lyocell tow. Specifically, it can be confirmed that Examples 1 to 4 have the effect of reducing the amount of migration of phenolic components by 20% to 55% and 25% to 52%, respectively, compared to Comparative Example 1.

[0076] It was also confirmed that the effect of reducing phenolic components differed depending on the content of triethyl citrate (TEC) dispersed in the lyocell tow. Specifically, in Examples 3 and 4, which contained lyocell tow with 20 mg / rod and 30 mg / rod of triethyl citrate (TEC) dispersed therein, the amount of migration of phenolic components was reduced by 45% to 50%, demonstrating a significant reduction in the amount of migration of phenolic components compared to Comparative Example 1, Examples 1, and 2. Although not shown in the table, it was confirmed that when triethyl citrate (TEC) was added at 40 mg / rod or more, triethyl citrate (TEC) was transferred to the cigarette paper wrapping the lyocell tow, causing the cigarette paper to become wet or ink bleeding, resulting in a deterioration in the quality of the smoking article filter.

[0077] The above-described smoking article filter according to the present invention can be applied to a smoking article. Fig. 1 is a diagram showing a schematic configuration of a smoking article according to one embodiment of the present invention. The smoking article 100 includes a smoking material portion 10 and a filter portion 20, and the above-described smoking article filter can be applied to the filter portion 20 of the smoking article 100. In the smoking article 100, the smoking material portion 10 is located upstream of the filter portion 20.

[0078] The smoking material portion 10 may be filled with smoking material such as raw tobacco, flake tobacco, or a mixture of leaf tobacco and flake tobacco. Processed smoking material may be filled into the smoking material portion 10 in sheet or shredded form. The smoking material portion 10 may have an elongated rod shape, and its length, circumference, and diameter may be adjusted to sizes commonly used in the art, taking into consideration the amount of smoking material to be filled, user preferences, etc., without particular limitations. The smoking material portion 10 may contain at least one aerosol-generating material 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 flavorants, humectants, and / or acetate compounds. The aerosol-generating material and additives may be contained in the smoking material.

[0079] The filter unit 20 is disposed downstream of the smoking material unit 10 and serves as a filter through which the aerosol generated in the smoking material unit 10 passes just before the user inhales. The filter unit 20 can be manufactured using various materials and shapes. According to one embodiment of the present invention, the filter unit 20 essentially comprises a smoking article filter, as described above, containing lyocell tow, which includes a plurality of lyocell fibers, and triethyl citrate (TEC) dispersed on the lyocell tow. The smoking article filter containing lyocell tow and triethyl citrate (TEC) can replace the entire or partial filter unit 20 of a conventional smoking article. When partially replacing the filter unit 20, conventional filter materials can be used. Examples of conventional filter materials that can be used include cellulose acetate filters, paper filters, and hollow tube filters.

[0080] 1 shows that the filter unit 20 is a mono-filter consisting of a single filter, but is not limited thereto. For example, the filter unit 20 may be a dual filter or triple filter having two or more acetate filters to increase filtering efficiency.

[0081] In some embodiments, when the filter unit 20 is a dual filter or triple filter, one of the filters may be a filter containing lyocell tow containing the lyocell fiber of the present invention and triethyl citrate (TEC) dispersed in the lyocell tow (hereinafter referred to as a lyocell filter), and the other filters may 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 unit 20.

[0082] Although not shown, the smoking article 100 may further include a hollow tube structure, which is a tube-shaped structure having a hollow interior. The hollow tube structure may be disposed downstream of the filter section 20 including the lyocell filter.

[0083] In some embodiments, the hollow tubular structure may have perforations, but is not limited thereto. The hollow tubular structure may not have perforations. In some embodiments, when perforations are formed in the hollow tubular structure, the perforations may be formed at a position 10 mm to 15 mm upstream from the downstream end of the smoking article 100.

[0084] The exterior of the smoking material portion 10 and the filter portion 20 may be wrapped in a wrapper 30a or 30b.

[0085] The smoking material portion 10 can be wrapped in a smoking material wrapper 30a. A portion of the tobacco smoke generated during the combustion process of a typical smoking material portion 10 is released into the atmosphere through the smoking material wrapper 30a before passing through the filter portion 20, resulting in sidestream smoke that is unpleasant for secondhand smokers. Various attempts have been made to reduce sidestream smoke, such as incorporating fillers such as magnesium oxide, titanium oxide, cerium oxide, aluminum oxide, calcium carbonate, and zirconium carbonate into cigarette paper. However, simply applying these fillers to reduce sidestream smoke can result in a poor smoking experience, poor burn-off, and poor ash solidification, making it difficult to resolve these issues through an appropriate combination of fillers. In some embodiments, the smoking material wrapper 30a can incorporate a filler containing a mixture of magnesium oxide (MgO and / or Mg(OH)2) and calcium carbonate (CaCO3) to reduce sidestream smoke while simultaneously preventing poor smoking experience, poor ash solidification, and poor burn-off.

[0086] The filter part 20 can be wrapped in a filter part wrapper 30b. The filter part wrapper 30b can be made of oil-resistant wrapping paper, and the inner surface of the filter part wrapper 30b can further include aluminum foil. As described above, the filter part wrapper 30b is 90 mg. -2 It may have the following basis weights, but is not limited to these:

[0087] The smoking material section 10 wrapped in the smoking material section wrapper 30a and the filter section 20 wrapped in the filter section wrapper 30b can be bonded and wrapped with tipping paper 40. As shown in FIG. 1, the tipping paper 40 may be wrapped around at least a portion (e.g., a downstream portion) of the smoking material section wrapper 30a and the filter section wrapper 30b. In other words, at least a portion of the smoking material section 10 and the filter section 20 may be further wrapped and physically bonded with the tipping paper 40. According to one embodiment of the present invention, the tipping paper 40 may be made of, but is not limited to, non-porous wrapping paper that has not been treated for oil resistance. The tipping paper 40 may also contain, but is not limited to, a non-flammable material to prevent the filter section 20 from burning.

[0088] Although the embodiments of the present disclosure have been described above with reference to the accompanying drawings, those skilled in the art will understand that the present disclosure can be embodied in other specific forms without changing the technical concept or essential features thereof. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and are not limiting. The scope of protection of the present disclosure should be interpreted by the following claims, and all technical concepts within the scope equivalent thereto should be understood to be included in the scope of rights of the technical concepts defined by the present disclosure.

Claims

1. Lyocell tow containing lyocell fibers; a phenol-reducing substance dispersed in the lyocell tow, The phenol-reducing substance includes triethyl citrate (TEC), A smoking article filter, characterized in that the content of triethyl citrate is 0.11 mg to 1.85 mg per length (mm) of the lyocell tow.

2. 2. The smoking article filter according to claim 1, wherein the content of triethyl citrate is 0.18 mg to 1.2 mg per length (mm) of the lyocell tow.

3. 3. The smoking article filter according to claim 2, wherein the content of triethyl citrate is 0.5 mg to 0.95 mg per mm of length of the lyocell tow.

4. 4. The smoking article filter according to claim 3, wherein the content of triethyl citrate is 0.6 mg to 0.85 mg per mm of length of the lyocell tow.

5. 2. The smoking article filter according to claim 1, wherein the hardness of the smoking article filter is 70% to 95%.

6. The smoking article filter according to claim 1, wherein the lyocell fibers have a modified cross section.

7. a smoking substances section; a filter section disposed downstream of the smoking material section; a wrapper enclosing the smoking material portion or the filter portion; The filter section is A lyocell tow containing lyocell fibers and a phenol-reducing substance dispersed in the lyocell tow, The phenol-reducing substance includes triethyl citrate (TEC), A smoking article characterized in that the content of triethyl citrate is 0.11 mg to 1.85 mg per length (mm) of the lyocell tow.

8. 8. The smoking article according to claim 7, wherein the content of triethyl citrate is 0.6 mg to 0.85 mg per length (mm) of the lyocell tow.

9. 8. The smoking article according to claim 7, wherein the lyocell fibers have a modified cross section.

10. The smoking article according to claim 7, wherein the filter portion further comprises a capsule capable of generating a flavor.

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