Filter for smoking article comprising unchemically modified lyocell fibers and smoking article comprising same

Abstract

A filter for a smoking article comprising unchemically modified lyocell fibers and a smoking article including the same are provided. The filter for a smoking article containing unchemically modified lyocell fibers comprises: a lyocell tow containing a plurality of lyocell fibers, and a functional additive dispersed in the lyocell tow; at least some of the plurality of lyocell fibers are not chemically modified by the functional additive, and a first vibration peak, which is a vibration peak in the range of 1645 cm <-1 > to 1650 cm <-1 >, appears in the Fourier transform infrared spectrum of the lyocell tow in which the functional additive is dispersed.

Description

Technical Field

[0001] The present invention relates to a filter tip for a smoking article comprising a lyocell tow in which a functional additive is dispersed, that is, to a filter tip for a smoking article and a smoking article comprising the same. Even if the functional additive is added, the lyocell fiber is not chemically modified by the functional additive and therefore has excellent biodegradability. Background Art

[0002] Cigarette filters typically include cellulose acetate tow (tow), which is acetylated cellulose 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 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] During the manufacturing process of filters for smoking articles, functional additives are added to the tow to improve filtration performance. For example, when manufacturing filters for smoking articles, phenol-related functional substances (or phenol-reducing substances) are added to specifically reduce phenols produced during smoking, thereby reducing the phenolic smoke component in mainstream smoke. Previously, polyethylene glycol (PEG), triethyl citrate (TEC), and triacetin (TA) have been known to be added to cellulose acetate tow as phenol-related functional substances. When phenol-related functional substances composed of polyethylene glycol (PEG) and triethyl citrate (TEC) are added to hydrophobic cellulose acetate, the phenol-related functional substances also act as plasticizers on the cellulose acetate fibers, causing the hydrophobic cellulose acetate fibers to bind to each other, thereby reducing biodegradability.

[0005] The need for filters for smoking articles with excellent biodegradability highlights the need for highly biodegradable lyocell tow fibers that are not chemically modified, even when functional additives are added to them. Furthermore, a need exists for an analytical method that can accurately determine whether the lyocell tow fibers are chemically unmodified, even when functional additives are applied to the filter. Summary of the Invention

[0006] Technical issues

[0007] The problem to be solved by the present invention relates to a filter tip for a smoking article, which is a filter tip for a smoking article comprising a lyocell tow in which a functional additive is dispersed. The present invention aims to provide a filter tip for a smoking article, in which even if the above-mentioned functional additive is added, the lyocell fibers constituting the lyocell tow are not chemically modified by the above-mentioned functional additive, and therefore have excellent biodegradability.

[0008] Another problem to be solved by the present invention relates to a smoking article, which is a smoking article comprising a filter for smoking articles comprising a lyocell tow in which a functional additive is dispersed. The present invention aims to provide a smoking article comprising a filter for smoking articles, wherein even if the functional additive is added to the filter for smoking articles, the lyocell fibers constituting the lyocell tow are not chemically modified by the functional additive, and therefore have excellent biodegradability.

[0009] Solutions to the Problem

[0010] A filter for a smoking article according to one embodiment for solving the above-mentioned problem comprises: a lyocell tow comprising a plurality of lyocell fibers; and a functional additive dispersed in the lyocell tow; at least a portion of the plurality of lyocell fibers is not chemically modified by the functional additive, and the lyocell tow in which the functional additive is dispersed appears as a wavelength of 1645 cm in a Fourier transform infrared spectrum (FT-IR) of the lyocell tow. -1 to 1650cm -1 The first vibration peak of the vibration peak within the range.

[0011] In some embodiments, the functional additive may include an emulsion and a phenol-reducing substance, and the phenol-reducing substance may include at least one of polyethylene glycol (PEG), triethyl citrate (TEC), and triacetin (TA).

[0012] In some embodiments, the FT-IR spectrum of the Lyocell tow containing the functional additives may further show a chromatin at 1735 cm -1 to 1745cm -1 The second vibration peak is the vibration peak within the range.

[0013] In some embodiments, in the FT-IR spectrum, the parameter (PCF) is defined as the ratio of the height of the second vibration peak to the height of the first vibration peak, and the parameter value in the FT-IR spectrum of the lyocell tow dispersed with the functional additive may be greater than or equal to the parameter value in the FT-IR spectrum of the lyocell tow after cleaning the lyocell tow dispersed with the functional additive using a detergent.

[0014] In some embodiments, in the FT-IR spectrum, the parameter (PCF) is defined as the ratio of the height of the second vibration peak to the height of the first vibration peak, and the parameter value in the FT-IR spectrum of the lyocell tow dispersed with the functional additive can be in the range of greater than 1 and less than 20.

[0015] In some embodiments, after the lyocell tow in which the functional additive is dispersed is cleaned using a cleaning agent, a parameter value in an FT-IR spectrum of the cleaned lyocell tow is less than 1.

[0016] According to another embodiment, a filter for smoking articles for solving the above-mentioned problem comprises: a lyocell tow comprising a plurality of lyocell fibers, and a functional additive dispersed in the lyocell tow; at least a portion of the plurality of lyocell fibers is not chemically modified by the functional additive, and a first vibration peak corresponding to a CH bond appears in the FT-IR spectrum of the lyocell tow in which the functional additive is dispersed.

[0017] In some embodiments, a second vibration peak corresponding to a C═O bond further appears in the FT-IR spectrum of the Lyocell tow dispersed with the functional additive.

[0018] In some embodiments, in the FT-IR spectrum, the parameter (PCF) is defined as the ratio of the height of the second vibration peak to the height of the first vibration peak, and the parameter value in the FT-IR spectrum of the lyocell tow dispersed with the functional additive may be greater than the parameter value in the FT-IR spectrum of the lyocell tow after cleaning the lyocell tow dispersed with the functional additive using a detergent.

[0019] A smoking article according to one embodiment for solving the above-mentioned problem includes a smoking material portion, a filter portion, and a wrapping paper, wherein the filter portion includes: a lyocell tow comprising a plurality of lyocell fibers, and a functional additive dispersed in the lyocell tow; at least a portion of the plurality of lyocell fibers is not chemically modified by the functional additive, and a wavelength of 1645 cm appears in the spectrum of the lyocell tow dispersed with the functional additive. -1 to 1650cm-1 The first vibration peak within the vibration peak range.

[0020] Effects of the Invention

[0021] According to one embodiment, a filter tip for a smoking article and a smoking article including the same may be provided as described below. Even if a functional additive including a phenol-reducing substance having phenol-reducing properties is dispersed in a lyocell tow, the lyocell fiber is not chemically modified by the functional additive, and thus the excellent biodegradability of the lyocell fiber can be maintained.

[0022] Furthermore, according to one embodiment, a filter for smoking articles and a smoking article including the same can be provided, which have excellent biodegradability and excellent phenol reduction performance by dispersing a functional additive including a phenol reduction substance having phenol reduction performance in a lyocell tow.

[0023] Furthermore, Fourier-transform infrared spectroscopy (FTIR) analysis clearly confirmed that the Lyocell fibers were not chemically modified when the phenol-reducing substance was added to the Lyocell tow. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a diagram showing a schematic structure of a smoking article according to an embodiment of the present invention.

[0025] Figure 2 is a graph showing the comparison results of FT-IR spectra of lyocell tow without functional additives dispersed therein before and after cleaning.

[0026] Figure 3 is a graph showing comparison results of FT-IR spectra of Lyocell tow dispersed with a functional additive including PEG before and after cleaning.

[0027] Figure 4 is a graph showing comparison results of FT-IR spectra of Lyocell tow dispersed with a functional additive containing TEC before and after cleaning.

[0028] Figure 5 Graph showing comparison results of FT-IR spectra of Lyocell tow dispersed with a functional additive including TA before and after cleaning.

[0029] Figure 6Graph showing comparison results of FT-IR spectra of lyocell tow dispersed with functional additives including TA and TEC before and after cleaning.

[0030] Figure 7 is a graph showing comparison results of FT-IR spectra of lyocell tow dispersed with functional additives including PEG and TEC before and after cleaning.

[0031] Figure 8 is a graph showing comparison results of FT-IR spectra of lyocell tow dispersed with functional additives including TA and PEG before and after cleaning.

[0032] Figure 9 Graph showing comparison results of FT-IR spectra of Lyocell tow dispersed with functional additives including TA, TEC, and PEG before and after cleaning.

[0033] Figure 10 Graph showing comparison results of FT-IR spectra of cellulose acetate tow in which no functional additive is dispersed before and after cleaning.

[0034] Figure 11 Graph showing comparison results of FT-IR spectra of cellulose acetate tow in which a functional additive including PEG is dispersed before and after cleaning.

[0035] Figure 12 Graph showing comparison results of FT-IR spectra of cellulose acetate tow dispersed with a functional additive containing TEC before and after cleaning.

[0036] Figure 13 Graph showing comparison results of FT-IR spectra of cellulose acetate tow in which a functional additive including TA is dispersed before and after cleaning.

[0037] Figure 14 Graph showing comparison results of FT-IR spectra of cellulose acetate tow dispersed with functional additives including TA and TEC before and after cleaning.

[0038] Figure 15 Graph showing comparison results of FT-IR spectra of cellulose acetate tow dispersed with functional additives including PEG and TEC before and after cleaning.

[0039] Figure 16 Graph showing comparison results of FT-IR spectra of cellulose acetate tow dispersed with functional additives including TA and PEG before and after cleaning.

[0040] Figure 17 Graph showing comparison results of FT-IR spectra of cellulose acetate tow dispersed with functional additives including TA, TEC, and PEG before and after cleaning.

[0041] Figure 18 This is a graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the Lyocell tow in which the functional additive including PEG was dispersed.

[0042] Figure 19 To illustrate the effect of the PEG-containing functional additive on the lyocell tow ( Figure 18 A graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned lyocell tow after cleaning.

[0043] Figure 20 The graph shows the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the Lyocell tow in which the functional additives including TEC and PEG are dispersed.

[0044] Figure 21 To illustrate the effect of the dispersion of lyocell tow ( Figure 20 A graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned lyocell tow after cleaning.

[0045] Figure 22 This is a graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of Lyocell tow in which functional additives including TA, TEC, and PEG are dispersed.

[0046] Figure 23 To show the effect of the dispersion of lyocell tow containing TA, TEC and PEG functional additives ( Figure 22 A graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned lyocell tow after cleaning.

[0047] Figure 24 This is a graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of cellulose acetate tow in which a functional additive including PEG is dispersed.

[0048] Figure 25 To show the effect of the dispersion of cellulose acetate tow ( Figure 24A graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned cellulose acetate tow after cleaning.

[0049] Figure 26 This is a graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of cellulose acetate tow in which functional additives including TEC and PEG are dispersed.

[0050] Figure 27 To show the effect of the dispersion of cellulose acetate tow ( Figure 26 A graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned cellulose acetate tow after cleaning.

[0051] Figure 28 This is a graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of cellulose acetate tow in which functional additives including TA, TEC, and PEG are dispersed.

[0052] Figure 29 To show the effect of the dispersion of cellulose acetate tow ( Figure 28 A graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned cellulose acetate tow after cleaning. DETAILED DESCRIPTION

[0053] 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.

[0054] When adding reference numerals to components throughout the drawings, it should be noted that the same reference numerals denote the same components even when they are shown in different drawings. Furthermore, when describing the present disclosure, detailed descriptions of the configurations or functions of related known technologies may be omitted if they are deemed to obscure the gist of the present disclosure.

[0055] 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 form of a single number also include the form of a plurality of numbers.

[0056] 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 one component from another component, 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.

[0057] The terms “comprises” 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.

[0058] First, some terms used in this specification will be clarified.

[0059] 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.

[0060] In this specification, "smoking material" may refer to any type of material that can be used in a smoking article.

[0061] In this specification, “upstream” or “upstream direction” may refer to a direction away from a smoker's mouth, and “downstream” or “downstream direction” may refer to a direction toward a smoker's mouth.

[0062] In this specification, "longitudinal direction" may refer to the direction corresponding to the longitudinal axis of the smoking article.

[0063] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0064] Figure 1 This is a diagram showing a schematic structure of a smoking article according to an embodiment of the present invention.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] The present invention relates to a filter tip 20 for a smoking article (or a filter tip portion for a smoking article) included 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 comprising a plurality of lyocell fibers, and a functional additive dispersed in the lyocell tow; and at least a portion of the plurality of lyocell fibers may not be chemically modified by the functional additive.

[0069] In this specification, the term "chemically unmodified" means that even if a functional additive is added to a lyocell tow, the multiple lyocell fibers constituting the lyocell tow do not undergo chemical synthesis, chemical bonding, or compositional changes with the functional additive, and therefore the chemical properties and characteristics of the lyocell fibers remain unchanged. In other words, this may mean that the chemical properties and characteristics of the lyocell fibers contained in the lyocell tow to which the functional additive has been added are the same as those of the lyocell fibers contained in the lyocell tow to which the functional additive has not been added.

[0070] The lyocell tow included in the filter 20 for smoking articles according to the present invention is composed of a plurality of lyocell fibers equivalent to regenerated cellulose, which is a natural polymer and has not been chemically modified even when functional additives are added. Therefore, it is possible to maintain the characteristics of the lyocell tow with excellent biodegradability, so that the filter for smoking articles including the lyocell tow composed of the above-mentioned lyocell fibers can also have excellent biodegradability.

[0071] In some embodiments, the functional additives may be added to the lyocell fibers during the process of forming the lyocell tow, or may be added to the lyocell tow during the process of forming a filter for a smoking article using the lyocell tow. Although not limited thereto, when the functional additives are added to the lyocell fibers during the process of forming the lyocell tow, they may be added by spraying them directly onto the surface of the lyocell fibers in a spray type. In addition, when the functional additives are added to the lyocell fibers during the process of forming a filter for a smoking article, they may be added by indirect spraying using a brush type, but the present invention is not limited thereto.

[0072] In some embodiments, the functional additives may include phenol-related functional substances and emulsions.

[0073] In some embodiments, the functional additive may include a phenol-related functional substance, which may be a phenol-reducing substance. The term "phenol" may refer to a group of compounds consisting of a hydroxyl group (-OH) directly bonded to an aromatic hydrocarbon functional group, with phenol groups including phenol, catechol, m-p-cresol, and o-cresol. The "phenol-reducing substance" may correspond to a substance that specifically reduces phenols in smoke generated during smoking, such as at least one of phenol, catechol, m-p-cresol, and o-cresol.

[0074] In some embodiments, the phenol-reducing substance may include at least one of polyethylene glycol (PEG), triethyl citrate (TEC), and triacetin (TA).

[0075] The FT-IR spectrum of the Lyocell tow in which the functional additive is dispersed according to one embodiment may show at least a wavelength of 1645 cm -1 to 1650cm -1 The first vibration peak in the range of vibration peaks. In the above FT-IR spectrum, the peak at 1645 cm -1 to 1650cm -1 The first vibration peak within the range may be a vibration peak corresponding to a carbon-hydrogen (C-H) bond. The vibration peak corresponding to the carbon-hydrogen (C-H) bond may be a vibration peak corresponding to the Lyocell crystallinity number. Therefore, the first vibration peak may be a reference value for defining a parameter (PCF) described below.

[0076] The FT-IR spectrum may be a value obtained by attenuated total reflectance (ATR) using “IN10MX (manufactured by Thermo Fisher Scientific)”.

[0077] The FT-IR spectrum of the lyocell tow in which the functional additive is dispersed according to one embodiment may also show a peak at 1735 cm -1 to 1745cm -1 The second vibration peak in the range of vibration peaks. In the above FT-IR spectrum, the peak at 1735 cm -1 to 1745cm -1 The second vibration peak within the range may be a vibration peak corresponding to a carbon=oxygen (C=O) bond.

[0078] In one embodiment, to analyze whether a plurality of lyocell fibers constituting a lyocell tow have been chemically modified by a phenol-reducing substance contained in a functional additive after the lyocell tow has been added, an FT-IR spectrum obtained by FT-IR analysis of the lyocell tow in which the functional additive is dispersed and an FT-IR spectrum obtained by FT-IR analysis of the lyocell tow in which the functional additive is dispersed, after cleaning the lyocell tow in which the functional additive is dispersed, can be used. Hereinafter, in this specification, to analyze whether a lyocell fiber has been chemically modified by a phenol-reducing substance, a parameter (PCF) can be defined as the ratio (H2 / H1) of the height of the second vibration peak (H2) to the height of the first vibration peak (H1) appearing in the FT-IR spectrum.

[0079] In some embodiments, the cleaning agent may include at least one of HFIP solvent, MeOH, and hexane, but the present invention is not limited thereto.

[0080] In some embodiments, the parameter (PCF) value in the FT-IR spectrum of the lyocell tow dispersed with the functional additive may be greater than or equal to the parameter (PCF) value in the FT-IR spectrum of the lyocell tow after cleaning the lyocell tow dispersed with the functional additive using a cleaning agent.

[0081] In some other embodiments, the parameter (PCF) value in the FT-IR spectrum of the lyocell tow dispersed with the functional additive may be greater than the parameter (PCF) value in the FT-IR spectrum of the lyocell tow after cleaning the lyocell tow dispersed with the functional additive using a cleaning agent.

[0082] In some embodiments, the ratio (H2 / H1) of the height of the second vibration peak (H2) to the height of the first vibration peak (H1) appearing in the FT-IR spectrum of the lyocell tow dispersed with the functional additive, i.e., the parameter (PCF) may be in the range of greater than 1 and less than 20, or in the range of greater than 1 and less than 20.

[0083] In some embodiments, after the lyocell tow in which the functional additive is dispersed is cleaned using a cleaning agent, a parameter (PCF) value in the FT-IR spectrum of the cleaned lyocell tow may be 1 or less.

[0084] Figure 2 is a graph showing comparison results of FT-IR spectra of lyocell tow without functional additives dispersed therein before and after cleaning, Figure 3 is a graph showing comparison results of FT-IR spectra of lyocell tow dispersed with a functional additive including PEG before and after cleaning, Figure 4 is a graph showing comparison results of FT-IR spectra of Lyocell tow dispersed with a functional additive containing TEC before and after cleaning, Figure 5 is a graph showing comparison results of FT-IR spectra of Lyocell tow in which a functional additive including TA is dispersed before and after cleaning, Figure 6 is a graph showing comparison results of FT-IR spectra of lyocell tow dispersed with functional additives including TA and TEC before and after cleaning, Figure 7 is a graph showing comparison results of FT-IR spectra of lyocell tow dispersed with functional additives including PEG and TEC before and after cleaning, Figure 8 is a graph showing comparison results of FT-IR spectra of lyocell tow dispersed with functional additives including TA and PEG before and after cleaning, Figure 9Graph showing comparison results of FT-IR spectra of Lyocell tow dispersed with functional additives including TA, TEC, and PEG before and after cleaning.

[0085] and, Figure 10 is a graph showing the comparison results of FT-IR spectra of cellulose acetate tow in which no functional additive is dispersed before and after cleaning, Figure 11 is a graph showing comparison results of FT-IR spectra of cellulose acetate tow in which a functional additive including PEG is dispersed before and after cleaning, Figure 12 is a graph showing comparison results of FT-IR spectra of cellulose acetate tow dispersed with a functional additive containing TEC before and after cleaning, Figure 13 : is a graph showing the comparison results of FT-IR spectra of cellulose acetate tow in which a functional additive including TA is dispersed before and after cleaning. Figure 14 is a graph showing comparison results of FT-IR spectra of cellulose acetate tow dispersed with functional additives including TA and TEC before and after cleaning, Figure 15 is a graph showing comparison results of FT-IR spectra of cellulose acetate tow dispersed with functional additives including PEG and TEC before and after cleaning, Figure 16 is a graph showing comparison results of FT-IR spectra of cellulose acetate tow in which functional additives including TA and PEG are dispersed before and after cleaning, Figure 17 Graph showing comparison results of FT-IR spectra of cellulose acetate tow dispersed with functional additives including TA, TEC, and PEG before and after cleaning.

[0086] Figure 18 This is a graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the Lyocell tow in which the functional additive including PEG is dispersed. Figure 19 To illustrate the effect of the PEG-containing functional additive on the lyocell tow ( Figure 18 A graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned lyocell tow after cleaning.

[0087] Figure 20 This is a graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the Lyocell tow in which the functional additives including TEC and PEG are dispersed. Figure 21 To illustrate the effect of the dispersion of lyocell tow ( Figure 20A graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned lyocell tow after cleaning.

[0088] Figure 22 This is a graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of Lyocell tow in which functional additives including TA, TEC, and PEG are dispersed. Figure 23 To show the effect of the dispersion of lyocell tow containing TA, TEC and PEG functional additives ( Figure 22 A graph showing the measurement results of the height of the first vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned lyocell tow after cleaning.

[0089] Figure 24 This is a graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of cellulose acetate tow in which a functional additive including PEG is dispersed. Figure 25 To show the effect of the dispersion of cellulose acetate tow ( Figure 24 A graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned cellulose acetate tow after cleaning.

[0090] Figure 26 This is a graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of cellulose acetate tow in which functional additives including TEC and PEG are dispersed. Figure 27 To show the effect of the dispersion of cellulose acetate tow ( Figure 26 A graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned cellulose acetate tow after cleaning.

[0091] Figure 28 This is a graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of cellulose acetate tow in which functional additives including TA, TEC, and PEG are dispersed. Figure 29 To show the effect of the dispersion of cellulose acetate tow ( Figure 28 A graph showing the measurement results of the height of the third vibration peak and the height of the second vibration peak in the FT-IR spectrum of the cleaned cellulose acetate tow after cleaning.

[0092] Below, we will refer to Figures 2 to 29 The chemical changes of phenol-reducing substances not contained in the functional additives in Lyocell fibers were explained using FT-IR spectra obtained by FT-IR analysis of Lyocell tow in which a functional additive containing phenol-reducing substances was dispersed and FT-IR spectra obtained by FT-IR analysis of Lyocell tow after cleaning the Lyocell tow in which the functional additive was dispersed using a detergent.

[0093] Example 1 (Lyocell tow+PEG 600)

[0094] A filter for a smoking article was manufactured using Lyocell tow to which 20 uL of PEG 600 was added, which had the following requirements: a draw resistance of 405 mm WG, a length of 108 mm, and a circumference of 24.2 mm.

[0095] Example 2 (Lyocell tow + TEC)

[0096] A filter for a smoking article was manufactured in the same manner as in Example 1, except that TEC (ie, 20 uL of TEC) was added to the lyocell tow instead of PEG 600.

[0097] Example 3 (Lyocell tow + TA)

[0098] A filter for a smoking article was manufactured in the same manner as in Example 1, except that TA (ie, 20 uL of TA) was added to the lyocell tow instead of PEG 600.

[0099] Example 4 (Lyocell tow + TA + TEC)

[0100] A filter for a smoking article was manufactured in the same manner as in Example 1, except that 20 uL of TA and TEC were added to the lyocell tow in a 1:1 ratio (ie, 10 uL of each of TA and TEC were added) instead of PEG 600.

[0101] Example 5 (Lyocell tow+PEG 600+TEC)

[0102] A filter for a smoking article was manufactured in the same manner as in Example 1, except that PEG 600 and TEC were added to the lyocell tow in a total weight of 20 uL at a ratio of 1:1 instead of PEG 600.

[0103] Example 6 (Lyocell tow+PEG 600+TA)

[0104] A filter for a smoking article was manufactured in the same manner as in Example 1, except that PEG 600 and TA were added to the lyocell tow in a total weight of 20 uL at a ratio of 1:1 instead of PEG 600.

[0105] Example 7 (Lyocell tow+PEG 600+TA+TEC)

[0106] A filter for a smoking article was manufactured in the same manner as in Example 1, except that 20 uL of TA, TEC, and PEG 600 were added to the lyocell tow at a ratio of 1:1:1 instead of PEG 600.

[0107] Comparative Example 1 (Lyocell Tow)

[0108] A filter for a smoking article was manufactured in the same manner as in Example 1, except that no functional additive was added to the lyocell tow.

[0109] <Experimental Example 1> Comparative Analysis of FT-IR Spectra Before and After Cleaning of Lyocell Tow Dispersed with a Functional Additive Containing Phenol-Reducing Substances

[0110] IN10MX (manufactured by Thermo Fisher Scientific) was used as a Fourier transform infrared spectrometer at 400 cm -1 Up to 4000cm -1 Under the measurement conditions of the attenuated total reflection (ATR) method, lyocell tow portions were respectively extracted from the filters for smoking articles of Examples 1 to 7, and the FT-IR spectra of the lyocell tow with added functional additives and the lyocell tow without added functional additives of Comparative Example 1 were respectively measured (hereinafter referred to as “FT-IR spectra before cleaning”), the lyocell tows of Examples 1 to 7 and Comparative Example 1 were cleaned with hexane, and the FT-IR spectra of the lyocell tow after cleaning were respectively measured (hereinafter referred to as “FT-IR spectra after cleaning”).

[0111] Specifically, the FT-IR spectra of the lyocell tows prepared in each of Examples 1 to 7 and Comparative Example 1 (FT-IR spectra before cleaning) and the FT-IR spectra of the lyocell tows after cleaning the lyocell tows of each of Examples 1 to 7 and Comparative Example 1 using hexane (FT-IR spectra after cleaning) were compared, and the results are shown in FIG. Figures 3 to 9 and Figure 2 .like Figures 2 to 9 The FT-IR spectrum shown at the top is the FT-IR spectrum of the lyocell tow before cleaning. Figures 2 to 9The FT-IR spectrum shown at the bottom is the FT-IR spectrum of the cleaned lyocell tow.

[0112] When compared to Figures 2 to 9 When the FT-IR spectrum of each lyocell tow before cleaning is shown at the top of each lyocell tow, the FT-IR spectrum of the lyocell tow before cleaning to which at least one functional additive including TEC, PEG and TA is added is shown ( Figures 3 to 9 The upper end of the FT-IR spectrum of Lyocell tow before cleaning without adding functional additives ( Figure 2 Compared with the upper end of -1 to 1745cm -1 The height of the vibration peak in the range increases significantly.

[0113] For example, Figure 3 The FT-IR spectrum of the PEG-added Lyocell tow before cleaning is shown in the upper part. Figure 2 Compared with the FT-IR spectrum of the lyocell tow before cleaning shown at the top, the -1 to 1745cm -1 1738.22cm within the range -1 There is a significant vibration peak at Figure 4 The FT-IR spectrum of the Lyocell tow with TEC added before cleaning is shown in the upper part. Figure 2 Compared with the FT-IR spectrum of the lyocell tow before cleaning shown at the top, the -1 to 1745cm -1 1737.23cm within the range -1 There is a significant vibration peak at Figure 5 The FT-IR spectrum of the lyocell tow with TA added before cleaning is shown in the upper part of FIG. Figure 2 Compared with the FT-IR spectrum of the lyocell tow before cleaning shown at the top, the -1 to 1745cm -1 1739.56cm within the range -1 A vibration peak with a significant height appears at the

[0114] Therefore, when a functional additive comprising at least one of TA, TEC and PEG is added to the lyocell tow, the wavelength corresponding to the carbon=oxygen (C=O) bond at 1735 cm -1 to 1745cm -1 The height of the vibration peak within the range increases, thereby confirming the presence of a carbon=oxygen (C=O) bond in at least one of TA, TEC, and PEG that may be included in the functional additive.

[0115] In addition, when comparing Figures 3 to 9 When the FT-IR spectra of the lyocell tow before cleaning are shown in the upper and lower figures, no peak at 1735 cm-1 is detected in the FT-IR spectrum of the lyocell tow after cleaning shown in the lower figure, as compared with the FT-IR spectrum of the lyocell tow before cleaning shown in the upper figure. -1 to 1745cm -1 The vibration peaks in the range of 1:1 to 1:1 are found, or are significantly smaller than those in the FT-IR spectrum of the lyocell tow before cleaning.

[0116] It can be confirmed that when cleaning the Lyocell tow to which at least one functional additive including TA, TEC and PEG is added, the -1 to 1745cm -1 The carbon=oxygen (C=O) bonds measured within the range of 100 nm were reduced or eliminated. Specifically, it was confirmed that the functional additive comprising at least one of TA, TEC, and PEG was washed and removed during cleaning of the Lyocell tow. Therefore, it was indirectly confirmed that even when a functional additive comprising at least one of TA, TEC, and PEG was added to the Lyocell tow, the Lyocell tow was not chemically modified by the functional additive.

[0117] Comparative Example 2 (Cellulose Acetate Tow)

[0118] A filter for a smoking article was manufactured in the same manner as in Comparative Example 1, except that cellulose acetate tow without functional additives was used instead of lyocell tow.

[0119] Comparative Example 3 (Cellulose Acetate Tow + PEG 600)

[0120] A filter for a smoking article was manufactured in the same manner as in Comparative Example 2, except that 20 uL of PEG 600 was added to the cellulose acetate tow.

[0121] Comparative Example 4 (Cellulose Acetate Tow + TEC)

[0122] A filter for a smoking article was manufactured in the same manner as in Comparative Example 3, except that TEC was added to the cellulose acetate tow instead of PEG 600.

[0123] Comparative Example 5 (Cellulose Acetate Tow + TA)

[0124] A filter for a smoking article was manufactured in the same manner as in Comparative Example 3, except that TA was added to the cellulose acetate tow instead of PEG 600.

[0125] Comparative Example 6 (Cellulose Acetate Tow + TA + TEC)

[0126] A filter for a smoking article was manufactured in the same manner as in Comparative Example 3, except that 20 uL of TA and TEC in total were added to the cellulose acetate tow at a 1:1 ratio (ie, 10 uL of each of TA and TEC were added).

[0127] Comparative Example 7 (Cellulose Acetate Tow + PEG 600 + TEC)

[0128] A filter for a smoking article was manufactured in the same manner as in Comparative Example 3, except that 20 uL of PEG 600 and TEC were added to the cellulose acetate tow in a 1:1 ratio instead of PEG 600.

[0129] Comparative Example 8 (Cellulose Acetate Tow + PEG 600 + TA)

[0130] A filter for a smoking article was manufactured in the same manner as in Comparative Example 3, except that 20 uL of PEG 600 and TA were added to the cellulose acetate tow in a 1:1 ratio instead of PEG 600.

[0131] Comparative Example 9 (Cellulose Acetate Tow + PEG 600 + TA + TEC)

[0132] A filter for a smoking article was manufactured in the same manner as in Comparative Example 3, except that 20 uL of TA, TEC, and PEG 600 were added to the cellulose acetate tow at a ratio of 1:1:1 instead of PEG 600.

[0133] <Experimental Example 2> Comparative Analysis of FT-IR Spectra Before and After Cleaning of Cellulose Acetate Tow Dispersed with a Functional Additive Containing Phenol-Reducing Substances

[0134] IN10MX (manufactured by Thermo Fisher Scientific) was used as a Fourier transform infrared spectrometer at 400 cm -1 Up to 4000cm -1 Under the measurement conditions of the attenuated total reflectance (ATR) method, cellulose acetate tow portions were extracted from the filters for smoking articles of Comparative Examples 3 to 9, and the FT-IR spectra of the cellulose acetate tow with added functional additives and the cellulose acetate tow of Comparative Example 2 without added functional additives were measured (hereinafter referred to as "FT-IR spectra before cleaning"), and the cellulose acetate tows of Comparative Examples 2 to 9 were cleaned with hexane, and the FT-IR spectra of the cleaned cellulose acetate tows were measured (hereinafter referred to as "FT-IR spectra after cleaning").

[0135] Specifically, the FT-IR spectra of the cellulose acetate tows prepared in each of Comparative Examples 2 to 9 (FT-IR spectra before cleaning) and the FT-IR spectra of the cellulose acetate tows after cleaning each of Comparative Examples 2 to 9 using hexane (FT-IR spectra after cleaning) were compared, and the results are shown in FIG. Figures 10 to 17 .like Figures 10 to 17 The FT-IR spectrum shown at the top is the FT-IR spectrum of the cellulose acetate tow before cleaning. Figures 10 to 17 The FT-IR spectrum shown at the bottom is the FT-IR spectrum of the cleaned cellulose acetate tow.

[0136] When compared to Figures 11 to 17 When the FT-IR spectra shown at the upper and lower ends of the drawings are compared with the FT-IR spectrum of the cellulose acetate tow before cleaning shown at the upper end of each drawing, it can be confirmed that the FT-IR spectrum at 1735 cm-1 measured in the FT-IR spectrum of the cellulose acetate tow after cleaning shown at the lower end of each drawing is larger than that of the cellulose acetate tow before cleaning shown at the upper end of each drawing. -1 to 1745cm -1 The vibration peaks within the range are generally similar. In addition, in the case of cellulose acetate tow, it was confirmed that the FT-IR spectra before and after cleaning have vibration peaks within a generally similar vibration peak range.

[0137] This confirmed that when cleaning cellulose acetate tow to which at least one functional additive including TA, TEC and PEG was added, the -1 to 1745cm -1 The carbon=oxygen (C=O) bonds were measured within a range of 100 nm. Specifically, it was confirmed that when the cellulose acetate tow was cleaned, the functional additive comprising at least one of TA, TEC, and PEG was not washed out but remained in the cellulose acetate. Therefore, it was indirectly confirmed that when the functional additive comprising at least one of TA, TEC, and PEG was added to the cellulose acetate tow, the cellulose acetate tow was chemically modified by the functional additive, resulting in chemical bonding between the functional additive and the cellulose acetate tow.

[0138] <Experimental Example 3> Analysis of FT-IR Spectra of Lyocell Tow and Cellulose Acetate Tow Dispersed with a Functional Additive Containing Phenol-Reducing Substances Before and After Cleaning

[0139] Reference Figures 18 to 23 For the lyocell tows added with functional additives obtained in Examples 1, 5 and 7, the FT-IR spectra before and after cleaning were measured in the same manner as in Experimental Example 1, and the FT-IR spectra were analyzed. The FT-IR spectra at 1645 cm -1 to 1650cm -1The height of the first vibration peak (H1) in the range was measured at 1735 cm -1 to 1745cm -1 The height of the second vibration peak (H2) in the range Figures 18 to 23 ), and the ratio (H2 / H1) of the height of the second vibration peak (H2) to the height of the first vibration peak (H1) was calculated respectively. The results are shown in Table 1.

[0140] In addition, refer to Figures 24 to 29 For the cellulose acetate tows added with functional additives obtained in Comparative Examples 3, 7, and 9, FT-IR was measured before and after cleaning in the same manner as in Experimental Example 1, and the FT-IR spectra were analyzed. The FT-IR spectra at 1220 cm -1 to 1230cm -1 The height of the third vibration peak (H3) in the range was measured at 1735 cm -1 to 1745cm -1 The height of the second vibration peak (H2) in the range Figures 24 to 29 ), the ratio (H2 / H3) of the height of the second vibration peak (H2) to the height of the third vibration peak (H3) was calculated, and the results are shown in Table 2. On the other hand, at 1220 cm -1 to 1230cm -1 The third vibration peak within the range may be a vibration peak corresponding to an acetate peak defined similarly to the parameters of the lyocell tow, ie, a reference value.

[0141] Table 1

[0142]

[0143] Table 2

[0144]

[0145] Referring to Table 1, it can be confirmed that the ratio (H2 / H1) of the height of the second vibrational peak (H2) to the height of the first vibrational peak (H1) calculated in the FT-IR spectrum of the Lyocell tow to which the functional additive was added before cleaning was 1.03, 6.88, and 19.05 in Examples 1, 5, and 7, respectively, all of which were greater than 1. The ratio (H2 / H1) of the height of the second vibrational peak (H2) to the height of the first vibrational peak (H1) calculated in the FT-IR spectrum of the Lyocell tow to which the functional additive was added after cleaning was 0.65, 0.80, and 0.63 in Examples 1, 5, and 7, respectively, all of which were less than 1. Therefore, it can be indirectly confirmed that when the Lyocell tow to which the functional additive containing at least one of PEG, TEC, and TA was added was cleaned, the phenol-reducing substance added to the functional additive was washed away and removed. In other words, it was indirectly confirmed that even when the phenol-reducing substance was added to the lyocell tow, the lyocell tow was not chemically modified by the phenol-reducing substance.

[0146] In contrast, referring to Table 2, it can be confirmed that the ratio (H2 / H3) of the height of the second vibration peak (H2) to the height of the third vibration peak (H3) calculated in the FT-IR spectrum of the cellulose acetate tow to which the functional additive was added before cleaning was 0.57, 0.59, and 0.69 in Comparative Examples 3, 7, and 9, respectively, all of which were less than 1. The ratio (H2 / H3) of the height of the second vibration peak (H2) to the height of the third vibration peak (H3) calculated in the FT-IR spectrum of the cellulose acetate tow to which the functional additive was added after cleaning was 2.67, 0.61, and 0.53 in Comparative Examples 3, 7, and 9, respectively, i.e., less than or greater than 1. Furthermore, it can be confirmed that there is little difference between the ratio (H2 / H3) of the height of the second vibration peak (H2) to the height of the third vibration peak (H3) before cleaning and the ratio (H2 / H3) of the height of the second vibration peak (H2) to the height of the third vibration peak (H3) after cleaning. Therefore, it was indirectly confirmed that when cellulose acetate tow to which a functional additive comprising at least one of PEG, TEC, and TA was added was cleaned, the bonding relationship between the phenol-reducing substance added to the functional additive and the cellulose acetate tow was substantially maintained. In other words, when the phenol-reducing substance was added to the cellulose acetate tow, it was not cleaned by the cleaning agent, and thus it was indirectly confirmed that the cellulose acetate tow was chemically modified by the phenol-reducing substance.

[0147] The above-mentioned filter for smoking articles according to the present invention can be applied to smoking articles. Figure 11 is a diagram showing a schematic structure of a smoking article according to a specific embodiment of the present invention. The smoking article 100 includes a smoking 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 smoking material portion 10 is located upstream of the filter portion 20.

[0148] 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.

[0149] The filter portion 20 is located downstream of the smoking material portion 10 so as to serve as a filter that passes through before the user inhales the aerosol material generated in the smoking material portion 10. 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 filter for smoking products, and the above-mentioned filter for smoking products includes a lyocell tow containing a plurality of lyocell fibers and triethyl citrate (TEC) dispersed on the above-mentioned lyocell tow. The above-mentioned filter for smoking products containing lyocell tow and triethyl citrate (TEC) can replace all or part of the filter portion 20 of the existing smoking product. When replacing a part, the filter material used in the past can be used together. Existing filter materials may include, for example, cellulose acetate filter tips, paper filter tips, hollow tube filter tips, etc.

[0150] 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.

[0151] 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 a filter comprising a lyocell tow containing lyocell fibers and triethyl citrate (TEC) dispersed in the lyocell tow (hereinafter referred to as a lyocell filter), while another of the plurality of 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 portion 20.

[0152] In addition, although not shown in the drawings, 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 filter portion 20 including the lyocell filter.

[0153] In some embodiments, a perforation may be formed in the hollow tube structure, but the present invention is not limited thereto. The hollow tube structure may not have a perforation. In some embodiments, when a perforation is formed in the hollow tube structure, the perforation may be formed at a distance of 10 mm to 15 mm upstream from the downstream end of the smoking article 100.

[0154] The exterior of the smoking material portion 10 and the filter portion 20 may be wrapped with wrapping paper (smoking material portion wrapping paper 30a or filter portion wrapping paper 30b).

[0155] The above-mentioned smoking material portion 10 can be wrapped by a smoking material portion wrapper 30a. In general, a portion of the cigarette smoke generated during the combustion process of the smoking material portion 10 is released into the atmosphere through the smoking material portion wrapper 30a before passing through the filter portion 20, and the sidestream smoke causes discomfort to secondhand smokers. In order to reduce the above-mentioned sidestream smoke, various attempts have been made, such as adding fillers such as magnesium oxide, titanium oxide, cerium oxide, aluminum oxide, calcium carbonate, and zirconium carbonate to existing cigarette papers. However, when simply using these fillers to reduce sidestream smoke, problems such as reduced smoking sensation, or extinguished combustion and reduced ash integrity occur. Therefore, it is difficult to solve the above-mentioned problems by appropriately combining the materials used for the fillers. In some embodiments, in order to prevent the reduction of smoking sensation, reduced ash integrity and extinguished combustion while reducing sidestream smoke, the smoking material portion wrapper 30a can use a filler of mixed magnesium oxide (MgO and / or Mg(OH)2) and calcium carbonate (CaCO3).

[0156] The filter tip 20 can be wrapped by a filter tip wrapper 30b. The filter tip wrapper 30b can be made of oil-resistant paper, and the inner side of the filter tip wrapper 30b can further include aluminum foil. As mentioned above, the filter tip wrapper 30b can have a 90mg -2 The following basis weights are provided, but the present invention is not limited thereto.

[0157] 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.

[0158] 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 a plurality of lyocell fibers, and Functional additives dispersed in the lyocell tow; At least a portion of the plurality of lyocell fibers is not chemically modified by the functional additive. The Fourier transform infrared spectrum of the lyocell tow in which the functional additive is dispersed appears as 1645 cm -1 to 1650cm -1 The first vibration peak within the vibration peak range.

2. The filter tip for a smoking article according to claim 1, wherein The above functional additives include emulsifiers and phenol-reducing substances, The phenol-reducing substance includes at least one of polyethylene glycol, triethyl citrate and triacetin.

3. The filter tip for a smoking article according to claim 1, characterized in that The Fourier transform infrared spectrum of the lyocell tow in which the functional additive is dispersed also shows a chromatin at 1735 cm -1 to 1745cm -1 The second vibration peak is the vibration peak within the range.

4. The filter tip for a smoking article according to claim 3, characterized in that In Fourier transform infrared spectroscopy, the PCF parameter is defined as the ratio of the height of the second vibration peak to the height of the first vibration peak. The PCF parameter value in the Fourier transform infrared spectrum of the above-mentioned lyocell tow in which the above-mentioned functional additive is dispersed is greater than or equal to the PCF parameter value in the Fourier transform infrared spectrum of the lyocell tow after cleaning the above-mentioned lyocell tow in which the above-mentioned functional additive is dispersed using a detergent.

5. The filter tip for a smoking article according to claim 3, wherein In Fourier transform infrared spectroscopy, the PCF parameter is defined as the ratio of the height of the second vibration peak to the height of the first vibration peak. A PCF parameter value in the Fourier transform infrared spectrum of the lyocell tow in which the functional additive is dispersed is within a range of 1 to 20.

6. The filter tip for a smoking article according to claim 5, characterized in that After the lyocell tow in which the functional additive is dispersed is cleaned using a cleaning agent, a PCF parameter value of the cleaned lyocell tow in a Fourier transform infrared spectrum is 1 or less.

7. A filter tip for a smoking article, characterized in that: include: Lyocell tow, comprising a plurality of lyocell fibers, and Functional additives dispersed in the lyocell tow; At least a portion of the plurality of lyocell fibers is not chemically modified by the functional additive. In the Fourier transform infrared spectrum of the lyocell tow in which the functional additive is dispersed, a first vibration peak corresponding to a CH bond appears.

8. The filter for smoking articles according to claim 7, characterized in that The Fourier transform infrared spectrum of the lyocell tow in which the functional additive is dispersed further shows a second vibration peak corresponding to a vibration peak of a C═O bond.

9. The filter for smoking articles according to claim 8, characterized in that In Fourier transform infrared spectroscopy, the PCF parameter is defined as the ratio of the height of the second vibration peak to the height of the first vibration peak. The PCF parameter value in the Fourier transform infrared spectrum of the lyocell tow in which the functional additive is dispersed is greater than the PCF parameter value in the Fourier transform infrared spectrum of the lyocell tow after cleaning the lyocell tow in which the functional additive is dispersed using a cleaning agent.

10. A smoking article comprising a smoking material portion, a filter portion and a wrapping paper, characterized in that: The filter portion includes: Lyocell tow, comprising a plurality of lyocell fibers, and Functional additives dispersed in the lyocell tow; At least a portion of the plurality of lyocell fibers is not chemically modified by the functional additive. The Fourier transform infrared spectrum of the lyocell tow in which the functional additive is dispersed appears as 1645 cm -1 to 1650cm -1 The first vibration peak within the vibration peak range.

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