JP7793781B2 - Novel cigarette filters containing humectants - Google Patents

Description

The present invention relates to a novel tobacco filter containing a humectant and a smoking article incorporating the filter.

Conventional technology has utilized techniques such as adding humectants to cigarette filters to increase the amount of aerosol, one of the factors that contribute to a satisfying smoking experience. However, these humectants release vapor at high temperatures, and cellulose acetate (CA), the material used in conventional cigarette filters, melts at such high temperatures, making it difficult to use humectants and cellulose acetate at the same time.

Therefore, to solve the above problems, instead of using cellulose acetate cigarette filters, there is a solution to use paper filters that utilize the base paper of paper by adding humectants such as glycerin or propylene glycol to the paper filter in order to increase the amount of smoke produced when smoking.

However, even in the case of paper filters to which a humectant has been added, the following specific problems arise.
i) When raw paper is used, an unpleasant odor specific to paper is generated.
ii) A minimum filter conditioning period of 2 weeks is required.
iii) Due to the characteristics of raw paper and crimped paper, it is difficult to achieve uniform suction resistance.
iv) Since it is manufactured using crimped paper, the appearance of the filter cross section is not beautiful.

In order to overcome the problems and/or limitations of the prior art as described above, the present invention aims to provide a novel humectant-containing cigarette filter and/or a smoking article containing the same, which is manufactured by applying a cigarette filter utilizing lyocell fiber instead of a cellulose acetate filter or paper filter and adding a humectant.

However, the problems that the present invention aims to solve are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those with ordinary skill in the relevant technical field from the following description.

According to one embodiment of the present invention, there is provided a cigarette filter comprising lyocell tow containing lyocell fiber bundles, a humectant, and a binder.

According to one embodiment, there is provided a smoking article comprising a tobacco medium portion, a filter portion, and a wrapper,
The filter portion includes a lyocell tow containing lyocell fibers, a moisturizing agent, and a binder;
The smoking article is characterized in that the humectant includes one or more of propylene glycol (PG) and glycerin, and is dispersed in the lyocell tow in a brush type or spray type.

According to another aspect, there is provided a method for manufacturing a cigarette filter, comprising the steps of:
Step (S1) of preparing a lyocell tow containing lyocell fiber bundles;
The method includes: (S2) mixing a humectant and a binder to prepare a mixed solution; and (S3) dispersing the mixed solution in the lyocell tow;
The moisturizer comprises one or more of propylene glycol (PG) and glycerin;
the binder comprises at least one selected from the group consisting of hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose (HPC), ethyl cellulose (EC), methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), polyvinyl acetate (PVAc), starch, dextrin, and polyester-based binders;
the polyester binder contains at least one selected from the group consisting of alkylenes having 5 to 12 carbon atoms, arylenes having 5 to 12 carbon atoms, and heteroarylenes having 5 to 12 carbon atoms;
The step (S3) provides a method for manufacturing a cigarette filter, wherein the lyocell tow is dispersed in a brush type or a spray type.

According to one aspect of the present invention, lyocell fibers with a cellulose network structure are towed to form filter rods and then applied to cigarette filters. This produces filters similar to those made with cellulose acetate (CA) filters, with a clean appearance and no unpleasant odors associated with paper filters. Furthermore, filters made by towing lyocell fibers have less variation in suction resistance compared to paper filters, resulting in a more uniform suction resistance.

In addition, lyocell is hydrophilic, and since lyocell's thin tow is made up of fiber strands, it has the advantage of having a high specific surface area, allowing for faster absorption of hydrophilic humectants compared to paper filters and stabilizing suction resistance. Unlike cellulose acetate, it does not have a glass transition temperature (Tg), meaning it can be stored in filter rod form even at temperatures above 300°C, at which point humectants begin to release vapor. This also gives it the excellent advantage of being able to use humectants and lyocell materials together.

The effects of the present invention are not limited to those described above, but should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description of the invention or the claims.

1 is a diagram showing a schematic configuration of a non-combustion heating smoking article including a filter according to one embodiment of the present invention. 1 is a diagram showing a schematic configuration of a combustion-type smoking article including a filter according to one embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to Figures 1 and 2 of the accompanying drawings. However, various modifications may be made to the embodiments, and the scope of the patent application is not limited or restricted by such embodiments. It should be understood that all modifications, equivalents, and alternatives to the embodiments are included in the scope of the patent.

The terms used in the examples are for descriptive purposes only and should not be construed as limiting. The singular includes the plural unless otherwise clearly indicated. In this specification, the terms "comprise" or "have" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood not to preclude the presence or possibility of addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments pertain. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art, and should not be interpreted as having an idealized or overly formal meaning unless expressly defined in this application.

Furthermore, when describing the accompanying drawings, the same reference numerals will be used to designate the same components regardless of the reference numerals, and redundant descriptions thereof will be omitted. When describing the embodiments, if it is determined that a detailed description of related publicly known technology may obscure the gist of the embodiments, such a detailed description will be omitted.

In addition, when describing components of the embodiments, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are used merely to distinguish the components from other components, and do not limit the nature, order, or sequence of the components.

Components included in one embodiment and components having common functions will be described using the same names in other embodiments. Unless otherwise specified, the description of one embodiment may also be applied to other embodiments, and detailed descriptions will be omitted to the extent that they overlap.

Throughout the specification, "smoking article" may refer to an article capable of generating an aerosol, such as a cigarette or cigar. 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.

Furthermore, throughout this 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 tobacco material portion 10 is located upstream of or in the upstream direction of the tobacco filter portion 20.

Furthermore, although the present specification uses as an example a smoking article 100 selected from either a combustion-type cigarette or a non-combustion-heated cigarette used in conjunction with an aerosol generating device (not shown), such as an electronic cigarette device, the present invention is not limited to this and can include all of the above concepts.

According to one embodiment of the present invention, there is provided a cigarette filter comprising lyocell tow containing lyocell fiber bundles, a humectant, and a binder.

When the cigarette filter of the present invention contains a humectant, the humectant may include one or more of propylene glycol (PG) and glycerin. By including such a humectant, the amount of atomization can be more effectively increased compared to conventional smoking articles, thereby providing the user with a more satisfying smoking experience.

The content of the humectant contained in the cigarette filter may be 1 mg to 5 mg per mm of filter length, preferably 3 mg to 5 mg, based on the length of the cigarette filter.

Alternatively, the moisturizer may be expressed based on the weight of lyocell tow, and may be contained in an amount of 0.1 mg to 0.5 mg per 1 mg of lyocell tow.

If the humectant content is less than the lower limit, the effect of adding the humectant in increasing the amount of atomization will be minimal. If the humectant content exceeds the upper limit, the humectant may leak out after the filter is manufactured, causing packaging contamination during filter distribution.

The framework (support) forming the cigarette filter of the present invention may include lyocell tow containing lyocell fiber bundles, and the binder serves to connect the multiple fiber bundles forming such a framework and the tows they constitute.

In the case of cellulose acetate (CA) filters, which are primarily used as the support for conventional cigarette filters, adding a humectant such as glycerin can cause the CA material to dissolve at high temperatures. In particular, when heated to temperatures of 200°C or higher, as in electronic cigarettes, the cellulose acetate filter material containing the humectant can melt, causing a damping phenomenon (CA begins to melt at temperatures between 80°C and 90°C), which can affect the filter's external shape and sensory characteristics. In particular, adding 2 mg/mm of glycerin (a humectant) to a cellulose acetate filter, as in the case of the lyocell filter of the present invention, can cause the problem of liquid leaking into the filter paper box (tray).

In addition to the cellulose acetate filter, paper stock can also be used as the support for cigarette filters. However, this method has the drawback of emitting a distinctive unpleasant odor originating from the paper stock, and requiring a minimum of two weeks for the filter to acclimate. Furthermore, because paper filters are made using crimped paper, they have the disadvantage of being difficult to achieve uniform suction resistance compared to cellulose acetate filters and lyocell filters, and the cross-section of the filter does not have a clean appearance.

In contrast, the lyocell tow contained in the cigarette filter according to one embodiment of the present invention is made of hydrophilic lyocell fiber bundles and has a high specific surface area, which allows it to quickly absorb hydrophilic humectants. It also does not melt at high temperatures, allowing it to maintain its filter rod shape even at high temperatures where the humectant vaporizes. This allows it to achieve uniform suction resistance (small suction resistance deviation) and does not cause problems such as the unpleasant odor of paper filters, making it more suitable as a humectant-containing cigarette filter than filters made of other fiber materials.

In the present invention, the binder that serves to connect multiple fiber bundles and the tows they constitute may specifically include one or more selected from the group consisting of hydroxypropyl methyl cellulose (HPMC), hydroxypropyl cellulose (HPC), ethyl cellulose (EC), methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), polyvinyl acetate (PVAc), starch, dextrin, and polyester-based binders, and the polyester-based binder may include one or more selected from the group consisting of alkylenes having 5 to 12 carbon atoms, arylenes having 5 to 12 carbon atoms, and heteroarylenes having 5 to 12 carbon atoms.

In addition to the tow containing the fiber bundles and the binder, the filter according to one embodiment of the present invention may further contain triethyl citrate (TEC) to enhance the tobacco flavor, or an emulsifier to improve layer separation in the mixed solution during filter manufacturing. When layer separation is improved through the use of an emulsifier, the mixed solution can be sprayed more uniformly onto the lyocell tow.

The triethyl citrate may be contained in an amount of 3% to 7% by weight based on the weight of the lyocell tow that constitutes the cigarette filter, and the specific type of emulsifier that can be used may be one or more of fatty acid carboxyl compounds, sorbitan ester compounds, sorbate compounds, and ethoxy compounds.

The addition of humectants such as propylene glycol and glycerin can be achieved by uniformly dispersing a solution containing the humectant and binder in the lyocell tow.

In this case, the dispersion of the solution may be brush-type or spray-type, but is not limited thereto. For example, various spraying methods can be used, such as uniformly spraying the moisturizer solution onto the surface of the lyocell using a general cellulose acetate (CA) tow plasticizer injection method, or applying a one-fluid or two-fluid spray. The brush-type refers to a method in which the liquid is sprayed by rotating a brush roller, while the spray-type refers to a method in which the liquid is sprayed through a spray nozzle. Among these, the brush-type spraying method is preferred from the viewpoint of preventing fume formation and achieving more uniform spraying.

According to another embodiment of the present invention, there is provided a smoking article comprising a tobacco medium portion, a filter portion, and a wrapper,
The filter portion includes a lyocell tow containing lyocell fibers, a moisturizing agent, and a binder;
The smoking article may be provided in which the humectant includes one or more of propylene glycol (PG) and glycerin, and is dispersed in the lyocell tow in a brush type or spray type.

In this case, the filter portion may be divided into two or more segments, such as a first segment and a second segment. Regardless of the position in which they are arranged, if one of the two or more segments includes a cigarette filter according to an embodiment of the present invention containing a humectant and lyocell tow, it may be included in the scope of the smoking article of the present invention.

Using FIG. 1 as an example, the tobacco filter 110 is located at the rear end of the tobacco medium portion 120 and may be composed of a single segment or multiple segments (not shown). When divided into multiple segments, such as a first segment and a second segment, the filter portion of the first segment may contain a cooling material, through which the tobacco medium portion is heated and the generated aerosol can be cooled, allowing the user to inhale the aerosol cooled to an appropriate temperature.

In addition, the smoking article 100 according to one embodiment of the present invention may include a front end plug 150 located at the upper end of the tobacco medium portion 120 in addition to the tobacco filter 110 located at the lower end of the tobacco medium portion 120. The front end plug 150 may serve to prevent the tobacco rod from detaching to the outside or to prevent aerosol liquefied from the tobacco rod during smoking from flowing into the aerosol generating device, and may be made of a tobacco filter according to one embodiment of the present invention.

Furthermore, the tobacco medium portion that constitutes a smoking article typically contains a tobacco substance containing nicotine, such as tobacco leaves, and may further contain excipients such as binders and other additives. As an example, the tobacco medium contained in the tobacco medium portion of the present invention can be manufactured in the form of granules containing tobacco substance and excipients.

In the present invention, the tobacco material is a material that forms the aerosol-generating substrate, and may be tobacco shreds, tobacco stems, tobacco dust generated during tobacco processing, and/or tobacco leaf strips. The tobacco leaf may be at least one selected from the group consisting of flue-cured, burley, oriental, cigar leaf, and toasted tobacco, but is not limited to these.

In addition, the wrapper that constitutes the smoking article can be made from cigarette paper that wraps the tobacco medium section, filter paper that wraps the filter section, etc., and the tipping wrapper that connects the tobacco medium section and the filter may optionally have one or more perforations formed along the circumferential direction to allow external air to flow in and internal gas to flow out, thereby achieving the cigarette's air dilution rate and adjusting the amount of mainstream smoke components that migrate.

A smoking article according to one embodiment of the present invention may be a combustible or non-combustible heated smoking article. When used with a non-combustible heated smoking article, it may be separately inserted into an aerosol generator. Here, the aerosol generator includes a receiving groove for receiving an aerosol product, and may also include a heater for heating the aerosol product to generate an aerosol, a controller for overall control of the operation of the aerosol generator, a battery for providing power for the aerosol generator, and a sensor for detecting when an aerosol product has been inserted into the aerosol generator. Given that current aerosol generators generally heat smoking articles to temperatures above 200°C, it is preferable that the smoking article according to one embodiment of the present invention be a non-combustible heated smoking article from the perspective of achieving effective results.

According to one embodiment of the present invention, there is provided a method for manufacturing a cigarette filter, comprising the following steps (S1) to (S3):
Step (S1) of preparing a lyocell tow containing lyocell fiber bundles;
A step (S2) of mixing a humectant and a binder to prepare a mixed solution; and a step (S3) of dispersing the mixed solution in the lyocell tow.

In this case, the humectant and binder used are considered to be substantially the same as the humectant and binder contained in the cigarette filter described in detail above, and the mixed solution dispersion method in step (S3) can also be carried out by brush type or spray type as described above.

The configuration and effects of the present invention will be explained in more detail below based on examples and comparative examples. However, these examples are intended to explain the present invention more specifically, and the scope of the present invention is not limited to these examples.

- Examples (1) Preparation Example: Preparation of Liquid Lyocell Filter A mixed solution was prepared by mixing glycerin humectant, hydroxypropyl methyl cellulose (HPMC) binder, and triethyl citrate, and then the mixed solution was directly sprayed onto lyocell tow containing lyocell fiber bundles using a spray liquid injection method (Sanjo or Hauni method) through the rotation of the brush roller of a filter manufacturing machine. The lyocell tow onto which the mixed solution had been sprayed was then wrapped in wrapping paper to form a filter rod.

Through this process, we were able to produce a lyocell filter containing 3 mg of the moisturizer of the present invention per (length of filter (mm)).

(2) Experimental Example 1: Comparison of physical properties of liquid lyocell filters and liquid paper filters The same method as in the above manufacturing example was used, but liquid lyocell filters were manufactured with different glycerin humectant contents, as shown in Table 1 below, and liquid paper filters were also manufactured with different glycerin humectant contents.

The physical properties of the manufactured filters were evaluated, and the results are shown in Table 1 below.

(The "weight (mg)" refers to the weight of the tow contained in one filter, excluding the filter wrapper.)

As shown in Table 1, the liquid lyocell filter exhibits the effect of shortening the filter conditioning period compared to the control (liquid paper filter). Furthermore, it can be seen that when glycerin is added based on the weight of the filter, the lyocell filter can retain a higher glycerin content than the paper filter.

In addition, in the case of the liquid paper filter, the increase in suction resistance at a glycerin dosage of 0.29 mg/mg compared to 0 mg/mg was 110 _mmH2O (92% increase), whereas in the case of the liquid lyocell filter, even at a glycerin dosage of 0.37 mg/mg, which is even higher than the liquid paper filter, the increase was only 59 _mmH2O (24% increase) compared to 0 mg/mg. This confirms that the liquid lyocell filter can achieve a uniform suction resistance even when a moisturizer is added, compared to the liquid paper filter.

(3) Experimental Example 2: Sensory evaluation by application of liquid lyocell filter The inventor conducted a sensory evaluation (out of 7 points) of smoking articles manufactured using a liquid paper filter containing 5 mg of moisturizer per (filter length (mm)) (control) and the liquid lyocell filter manufactured through the above manufacturing example (Example 1) on smoking taste intensity, atomization amount, irritation, unpleasant odor, suction power, and overall tobacco taste using 10 internal panelists from KT&G R&D (Table 2).

The control group and Example 1 were tested in a comparative experiment in which the amount of glycerin added per tow weight was as similar as possible (0.29 mg/mg vs. 0.37 mg/mg).

As shown in Table 2, the smoking article made using the liquid lyocell filter of Example 1 exhibits a similar level of aerosol volume compared to the smoking article made using the control liquid paper filter, but it was confirmed that it had less irritation and unpleasant odors and a better overall tobacco taste. This shows that the liquid lyocell filter is more suitable than the conventional liquid paper filter in terms of functionality for humectant-containing cigarette filters.

Although the above embodiments have been described using limited drawings, those skilled in the art may apply various technical modifications and variations based on the above. For example, the described techniques may be performed in a different order than described, and/or the components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different manner than described, or may be replaced or substituted by other components or equivalents, and still achieve suitable results.

Accordingly, other implementations, other embodiments, and equivalents of the claims are intended to be within the scope of the following claims .
[Item 1]
A cigarette filter comprising a lyocell tow containing lyocell fiber bundles, a moisturizing agent, and a binder.
[Item 2]
Item 2. The cigarette filter according to item 1, wherein the humectant comprises one or more of propylene glycol (PG) and glycerin.
[Item 3]
2. The cigarette filter according to item 1, wherein the moisturizing agent is dispersed in the lyocell tow in a brush type or a spray type.
[Item 4]
the binder comprises at least one selected from the group consisting of hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose (HPC), ethyl cellulose (EC), methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), polyvinyl acetate (PVAc), starch, dextrin, and polyester-based binders;
2. The tobacco filter according to item 1, wherein the polyester binder contains at least one selected from the group consisting of alkylenes having 5 to 12 carbon atoms, arylenes having 5 to 12 carbon atoms, and heteroarylenes having 5 to 12 carbon atoms.
[Item 5]
Item 2. The cigarette filter according to item 1, further comprising one or more emulsifiers selected from the group consisting of fatty acid carboxyl compounds, sorbitan ester compounds, sorbate compounds, and ethoxy compounds.
[Item 6]
Item 1. The cigarette filter according to item 1, further comprising triethyl citrate.
[Item 7]
7. The cigarette filter according to item 6, wherein the content of triethyl citrate is 3% by weight to 7% by weight based on the weight of the lyocell tow constituting the cigarette filter.
[Item 8]
8. The cigarette filter according to any one of items 1 to 7, wherein the content of the humectant is 1 mg to 5 mg per mm of the length of the cigarette filter.
[Item 9]
8. The tobacco filter according to any one of items 1 to 7, wherein the content of the humectant is 0.1 mg to 0.5 mg per mg of the weight of the lyocell tow.
[Item 10]
A smoking article comprising a tobacco medium portion, a filter portion, and a wrapper,
The filter portion includes a lyocell tow containing lyocell fibers, a moisturizing agent, and a binder;
The smoking article includes a humectant containing at least one of propylene glycol (PG) and glycerin, and the humectant is dispersed in the lyocell tow in a brush type or spray type.
[Item 11]
The filter portion is divided into two or more segments,
Item 11. The smoking article of item 10, wherein one or more of the two or more segments comprises lyocell tow containing lyocell fiber bundles, a humectant, and a binder.
[Item 12]
Item 12. The smoking article according to item 10 or 11, wherein the smoking article is a non-combustion heating type smoking article.
[Item 13]
(S1) preparing a lyocell tow containing lyocell fiber bundles;
(S2) mixing a humectant and a binder to prepare a mixed solution;
and (S3) dispersing the mixed solution in the lyocell tow,
The moisturizer comprises one or more of propylene glycol (PG) and glycerin;
the binder comprises at least one selected from the group consisting of hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose (HPC), ethyl cellulose (EC), methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), polyvinyl acetate (PVAc), starch, dextrin, and polyester-based binders;
the polyester binder contains at least one selected from the group consisting of alkylenes having 5 to 12 carbon atoms, arylenes having 5 to 12 carbon atoms, and heteroarylenes having 5 to 12 carbon atoms;
The step (S3) is a method for manufacturing a cigarette filter, in which the lyocell tow is dispersed in a brush type or a spray type.
[Item 14]
14. The method for manufacturing a cigarette filter according to item 13, wherein the mixed solution of step (S2) further comprises one or more emulsifiers selected from the group consisting of fatty acid carboxyl compounds, sorbitan ester compounds, sorbate compounds, and ethoxy compounds, and triethyl citrate.

Claims (17)

A cigarette filter comprising lyocell tow containing lyocell fiber bundles, a moisturizer and a binder. The cigarette filter according to claim 1, wherein the humectant includes one or more of propylene glycol (PG) and glycerin. The cigarette filter according to claim 1, wherein the moisturizing agent is dispersed in the lyocell tow in a brush or spray type. the binder comprises at least one selected from the group consisting of hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose (HPC), ethyl cellulose (EC), methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), polyvinyl acetate (PVAc), starch, dextrin, and polyester-based binders;
2. The cigarette filter according to claim 1, wherein the polyester binder contains at least one selected from the group consisting of alkylenes having 5 to 12 carbon atoms, arylenes having 5 to 12 carbon atoms, and heteroarylenes having 5 to 12 carbon atoms. The cigarette filter according to claim 1, further comprising one or more emulsifiers selected from the group consisting of fatty acid carboxyl compounds, sorbitan ester compounds, sorbate compounds, and ethoxy compounds. The cigarette filter according to claim 1, further comprising triethyl citrate. 7. The cigarette filter according to claim 6, wherein the content of said triethyl citrate is 3% by weight to 7% by weight relative to the weight of said lyocell tow constituting said cigarette filter. A cigarette filter according to any one of claims 1 to 7, wherein the content of the humectant is 1 mg to 5 mg per mm of length of the cigarette filter. A cigarette filter according to any one of claims 1 to 7, wherein the content of the humectant is 0.1 mg to 0.5 mg per mg of the weight of the lyocell tow. A smoking article comprising a tobacco medium portion, a filter portion, and a wrapper,
The filter portion includes a lyocell tow containing lyocell fibers, a moisturizing agent, and a binder.
Smoking articles. The smoking article according to claim 10, wherein the humectant comprises one or more of propylene glycol (PG) and glycerin, and is dispersed in the lyocell tow in a brush type or spray type. The filter portion is divided into two or more segments,
The smoking article of claim 10, wherein one or more of the two or more segments comprises the lyocell tow containing the lyocell fiber , the humectant , and the binder . The smoking article according to any one of claims 10 to 12 , wherein the smoking article is a non-combustion heating type smoking article. (S1) preparing a lyocell tow containing lyocell fiber bundles;
(S2) mixing a humectant and a binder to prepare a mixed solution;
Step (S3) of dispersing the mixed solution into the lyocell tow;
Contains
A method for manufacturing cigarette filters. The moisturizer comprises one or more of propylene glycol (PG) and glycerin;
the binder comprises at least one selected from the group consisting of hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose (HPC), ethyl cellulose (EC), methyl cellulose (MC), carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), polyvinyl acetate (PVAc), starch, dextrin, and polyester-based binders;
the polyester binder contains at least one selected from the group consisting of alkylenes having 5 to 12 carbon atoms, arylenes having 5 to 12 carbon atoms, and heteroarylenes having 5 to 12 carbon atoms;
15. The method for manufacturing a cigarette filter according to claim 14, wherein in step (S3), the dispersion is performed on the lyocell tow in a brush type or a spray type. 16. The method for manufacturing a cigarette filter according to claim 14 or 15, wherein the mixed solution in step (S2) further comprises mixing one or more emulsifiers selected from the group consisting of fatty acid carboxyl compounds, sorbitan ester compounds, sorbate compounds, and ethoxy compounds, and triethyl citrate. 2. The cigarette filter according to claim 1, wherein the content of the humectant is 3 mg per mm of the length of the cigarette filter.