CN117881306A - Cigarette filter comprising lyocell tow - Google Patents

Cigarette filter comprising lyocell tow Download PDF

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Publication number
CN117881306A
CN117881306A CN202280058477.8A CN202280058477A CN117881306A CN 117881306 A CN117881306 A CN 117881306A CN 202280058477 A CN202280058477 A CN 202280058477A CN 117881306 A CN117881306 A CN 117881306A
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CN
China
Prior art keywords
filter
cigarette
weight
lyocell
cigarette filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202280058477.8A
Other languages
Chinese (zh)
Inventor
梁真哲
马京培
安基真
郑奉洙
河成薰
郑钟喆
秦尚佑
李廷薰
徐昇潼
黃永男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kolon Industries Inc
KT&G Corp
Original Assignee
Kolon Industries Inc
KT&G Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kolon Industries Inc, KT&G Corp filed Critical Kolon Industries Inc
Publication of CN117881306A publication Critical patent/CN117881306A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
    • A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/067—Use of materials for tobacco smoke filters characterised by functional properties
    • A24D3/068—Biodegradable or disintegrable
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

The present invention provides a cigarette filter comprising: a lyocell tow made from a plurality of lyocell fibers; and a binder for binding the lyocell fibers to each other, wherein the cigarette filter has a hardness of 85% or more. In a cigarette filter according to an embodiment of the present invention, the cigarette filter has a hardness of 80% or more based on 100 parts by weight of lyocell tow even when 20 to 25 parts by weight of water is added for 5 minutes. A cigarette filter according to an embodiment of the present invention has a moisture degree of disintegration of 7% or less. The cigarette filter of one embodiment of the present invention overcomes the material problems of conventional lyocell tows and has high hardness and low moisture disintegration.

Description

Cigarette filter comprising lyocell tow
Technical Field
The present invention relates to cigarette filters comprising lyocell tow. In particular, the invention relates to a cigarette filter comprising: a lyocell tow made from a plurality of lyocell fibers; and a binder for binding the lyocell fibers to each other, wherein the cigarette filter has an excellent hardness of 85% or more.
The present application claims priority from korean patent application No. 10-2021-0173488, filed on 7-12-2021, the entire contents of which are incorporated herein by reference.
Background
Conventionally, in order to manufacture cigarettes, various tobacco leaves (leaf tobaccos) are first blended and processed to have a desired flavor. Thereafter, the processed tobacco leaves are cut to produce cut tobacco (cut tobacco leaf), and the cut tobacco is rolled up with a cigarette paper (cigarette paper) to obtain a filter-less cigarette. Thereafter, the filter is attached to the unfiltered cigarette as desired.
The cigarette paper may be made of hemp (flag), wood pulp, etc., and when burned, it is required to maintain combustibility and taste of the cigarette. The cigarette filter may include activated carbon, flavoring, etc., may be comprised of a single filter or multiple filters, and is surrounded by a cigarette filter plug wrap (cigarette filter wrapping paper). The tobacco thread portion and the cigarette filter are joined by tipping paper (tipping paper), which may include fine holes.
Conventional cigarette filters use cellulose acetate tow (tow) from wood pulp, which is cellulose extracted and acetylated, and recently, research into environmental materials as alternative materials is underway for natural environmental protection and cost saving. For example, the following tows are being developed: unlike cellulose acetate, lyocell (lyocell) fibers are used which fibrillate cellulose itself.
In cigarette filters, hardness is an important index related to consumer demand and workability in cigarette manufacture. When a cigarette filter is manufactured using a tow of a plurality of fiber filaments, the hardness of the cigarette filter is not suitable because of its low hardness, and it is necessary to increase the hardness to a predetermined level or more for use as a cigarette filter. For example, a method of increasing the hardness of a filter includes a method using a curing agent and a method using a plasticizer (plasticizer). The method for using the curing agent comprises the following steps: the method of stiffening the filter by bonding the filaments with a substance of an adhesive nature to impart stiffness to the filter. The method for using the plasticizer is as follows: the fibers themselves are partially dissolved or plasticized with a specific substance to form joints between the fibers, and then plasticized.
The conventional cellulose acetate uses a plasticizer (Triacetin, triethyl Citrate) to partially dissolve the filaments and uses the principle of mutual solidification between the filaments to impart hardness to the cigarette filter. However, lyocell fibers do not currently have a plasticizer, and thus, development of a hardness improver suitable for lyocell fibers is required.
Unlike cellulose acetate based on hydrophobicity, the lyocell fiber is known as a hydrophilic substance, and thus, the hardness is increased by a hardness-increasing agent, and thus, even if used as a cigarette filter, the structure is not disintegrated by moisture or the like supplied from a smoker or the like when smoking.
The present inventors have recognized the technical problems of the above-mentioned lyocell fiber materials and have continuously studied lyocell tows excellent in functionality suitable for use as cigarette filters, thereby completing the present invention.
Prior art literature
Patent literature
Patent document 1: korean laid-open patent publication No. 10-2015-0035800
Disclosure of Invention
Technical problem
A cigarette filter comprising lyocell tow as an environment-friendly material, which solves the problems of the material such as hardness and water disintegration of the lyocell tow.
Technical proposal
According to a first aspect of the present invention there is provided a cigarette filter comprising: a lyocell tow made from a plurality of lyocell fibers; and a binder for binding the lyocell fibers to each other, wherein the cigarette filter has a hardness of 85% or more.
In one embodiment of the present invention, the cigarette filter has a hardness of 80% or more based on 100 parts by weight of lyocell tow even when 20 to 25 parts by weight of water is added for 5 minutes.
In one embodiment of the present invention, the cigarette filter has a moisture degree of disintegration of 7% or less.
In one embodiment of the invention, the binder comprises a polyester.
In one embodiment of the present invention, the polyester is a copolymer of an aromatic monomer and an aliphatic monomer.
In one embodiment of the invention, the viscosity of the polyester is less than 5cps at 40 ℃ relative to a 15 weight percent concentration aqueous polyester solution.
In one embodiment of the present invention, the aromatic monomer is a dicarboxylic acid having a C5 to C12 arylene or heteroarylene group.
In one embodiment of the present invention, the aliphatic monomer is a diol having a C1 to C4 alkylene group, a dicarboxylic acid having a C2 to C12 alkylene group, or a combination thereof.
In one embodiment of the present invention, the polyester is contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the lyocell filament yarn.
In one embodiment of the invention, the adhesive further comprises hydroxypropyl methylcellulose or polyvinylpyrrolidone.
In one embodiment of the present invention, the weight ratio of polyester to hydroxypropyl methylcellulose or polyvinylpyrrolidone in the binder is 1:1 to 1:3.
Effects of the invention
The cigarette filter according to an embodiment of the present invention includes lyocell tow as an environment-friendly material, solves the material problems of the conventional lyocell tow, and has excellent hardness of 90% or more.
The cigarette filter has an appropriate durability against moisture, and therefore, when a smoker smokes a cigarette, the hardness change is minimized to 6% or less, and the excellent hardness of 85% or more can be maintained until the smoker finishes smoking and leaves the smoking article from his or her hand.
Drawings
Fig. 1 is a diagram showing a schematic structure of a smoking article according to an embodiment of the present invention.
Detailed Description
Specific examples are described in detail below with reference to the drawings. It should be noted that when reference is made to the constituent elements of each drawing, the same reference numerals are given to the same constituent elements as much as possible even when they appear in different drawings. When specific examples are described, if it is determined that specific descriptions about known structures or functions are not included in the understanding of the specific examples, detailed descriptions thereof will be omitted.
In addition, when the structural elements of the specific example are described, terms such as first, second, A, B, a, b, and the like may be used. Such terms are merely used to distinguish one structural element from another, and the nature, order, sequence, etc. of the corresponding structural elements are not limited to the terms thereof. It will be understood that when a structural element is referred to as being "connected," "coupled" or "coupled" to another structural element, it can be directly connected or coupled to the other structural element or other structural elements can be "connected," "coupled" or "coupled" between the structural elements.
The components that include functions common to those in one embodiment will be described using the same names in another embodiment. Unless stated to the contrary, the description described in one embodiment is also applicable to other embodiments, and the detailed description will be omitted insofar as repeated.
In this specification, the term "smoking article" refers to something that can produce an aerosol, such as a cigarette (cigarette), cigar, or the like. The smoking article may comprise an aerosol-generating substance or an aerosol-forming substrate. Also, the smoking article may comprise solid materials based on tobacco raw materials, such as lamina, leaf, reconstituted tobacco, and the like. The smoking material may comprise a volatile compound. The smoking article described above may comprise several segments with respective functionalities, such segments being denoted by the "… … section". In the present specification, the smoking article may be a heated cigarette used together with an aerosol generating device (not shown) such as an electronic cigarette apparatus, as well as a combustion type cigarette.
In the present specification, the terms "upstream" and "downstream" are terms that indicate the relative positions of the various segments that make up the smoking article, based on the direction in which the user draws air using the smoking article. The smoking article comprises an upstream end (i.e. an inlet portion) and a downstream end (i.e. an outlet portion) opposite thereto. When using the smoking article, the user may grasp the downstream end of the smoking article. The downstream end is downstream of the upstream end, and furthermore, the term "end" may also be described by a "tip".
The present invention relates to a cigarette filter applicable to a smoking article, and according to one embodiment of the present invention, the cigarette filter comprises: lyocell tow (tow) made from a plurality of lyocell fibres; and a binder for binding the lyocell fibers to each other. The lyocell fibers are environment-friendly fibers made from cellulose extracted from wood pulp. The lyocell filament bundles are bundles formed by cross-linking adjacent lyocell fibers. According to an embodiment of the present invention, the lyocell fiber may have a denier of 1.0 to 12.0. According to one embodiment of the present invention, the lyocell fiber bundles constituting the lyocell fiber bundles may have a denier of 15000 denier to 45000 denier. The binder solution is prepared by mixing a binder suitable for the lyocell fibers with a solvent, and the binder solution is sprayed on the lyocell strands and then dried, whereby the lyocell strands can form a structure having a hardness of a certain level or more.
The cigarette filter including the lyocell tow according to an embodiment of the present invention has excellent hardness by bonding with an adhesive and also excellent durability against moisture. According to an embodiment of the present invention, the cigarette filter has a hardness of 85% or more. Specifically, the hardness of the cigarette filter may be 85% or more, 86% or more, 87% or more, 88% or more, 89% or more, 90% or more, 91% or more, or 91.5% or more. The hardness of the cigarette filter is a value obtained by digitizing the degree of retention of the diameter of the cigarette filter when the cigarette filter is pressed with a certain horizontal force in the vertical direction, and specifically, the hardness can be calculated by the following equation.
Calculation formula one:
filter hardness (%) = [ D-a ]/d×100
Where D represents the filter diameter (mm) and a represents the distance (mm) from 300g of weight down (filter pressed). When calculating the hardness of the above cigarette filter, the hardness can be obtained by using a device commonly used in the artThe required measurement value can be, for example, DHT 200 from Filtrona company TM . The force applied when measuring the hardness takes into account the force applied when the actual smoker grips the cigarette. The hardness values of 85% or more obtained by the cigarette filter according to an embodiment of the present invention are technically significant in the following respects: the hardness is ensured by using lyocell tow which is an environment-friendly material, in place of the conventional cigarette filter made of cellulose acetate.
The hardness of the cigarette filter is the hardness of the first time a smoker grips a cigarette for smoking, and is not ensured until the smoker finishes smoking. When a smoker smokes, the cigarette filter may be supplied with a considerable amount of moisture, and the filter, including lyocell tow, has a level of durability to moisture above that which is sufficient to easily maintain the original hardness. Unlike cellulose acetate based on hydrophobicity, the lyocell fiber is known as a hydrophilic substance, and therefore, it is difficult to maintain hardness due to the characteristics of the material. According to one embodiment of the present invention, the cigarette filter has a hardness of 80% or more based on 100 parts by weight of lyocell tow even when 20 to 25 parts by weight of water is added to the cigarette filter and 5 minutes elapses. Specifically, the hardness of the cigarette filter after adding water may be 80% or more, 81% or more, 82% or more, 83% or more, 84% or more, 85% or more, 86% or more. After the addition of water, the hardness of the cigarette filter was also measured in the same manner as before the addition of water. After adding water, the hardness of the cigarette filter was measured to confirm the durability to moisture, taking into account the hardness change of the cigarette filter until the smoker completed smoking. The amount of water added or the elapsed time is in consideration of the actual smoking process of the smoker, and the average level of the amount of water contained in the cigarette filter after the actual smoker smokes is 8 parts by weight, and the addition of 20 to 25 parts by weight of water is more severe than the actual smoking case. The cigarette filter of one embodiment of the present invention maintains an excellent hardness of 85% or more when a smoker grips a cigarette during smoking.
The hardness before and after the addition of water are compared, and the degree of water disintegration indicating the amount of change in the hardness according to the addition of water can be calculated. According to one embodiment of the present invention, the cigarette filter has a moisture degree of disintegration of 7% or less. Specifically, the degree of moisture disintegration of the cigarette filter may be 7% or less, 6.5% or less, 6% or less, 5.5% or less, or 5% or less. The above-mentioned degree of moisture disintegration is basically based on the hardness before and after the addition of water, and can be calculated by the following formula two.
Calculation formula II:
degree of moisture disintegration (%) = (1-D 2 /D 1 )×100
Wherein D is 1 Refers to the hardness (%), D before adding water 2 Refers to the hardness (%) after adding water. The low degree of water disintegration is significant in that the hardness after water addition is high, but is technically significant in that the change in touch feeling perceived from a cigarette filter is small when smoking a cigarette, from the standpoint of smokers.
According to one embodiment of the invention, the adhesive comprises polyester. The polyester has a function of imparting stiffness to the lyocell yarn bundles by bonding the lyocell fibers. Specifically, the polyester is a synthetic resin obtained by reacting a polyvalent organic acid with a polyhydric alcohol, and has an appropriate resistance to water and various compounds. According to one embodiment of the invention, the above polyester has a weight average molecular weight of 1000 to 50000, in particular, 1500 to 30000, more in particular 2000 to 10000. When the molecular weight is lower than the above range, the resistance to water and the like can be reduced, and when the molecular weight is higher than the above range, the polymer is not easily dispersed in the lyocell yarn.
According to one embodiment of the present invention, the polyester is a copolymer of an aromatic monomer and an aliphatic monomer. The aromatic monomer imparts structural stability to the polyester and the aliphatic monomer imparts structural flexibility to the polyester, and thus the polyester including the aromatic monomer and the aliphatic monomer is easily bonded to other components such as lyocell fiber, and thus can impart functionality as an adhesive. The aromatic monomer may be a polyvalent organic acid or a polyhydric alcohol, and the aliphatic monomer may be a polyvalent organic acid or a polyhydric alcohol. The above polyester exhibits low viscosity in an aqueous solution state, and thus is easily sprayed and applied in an aqueous solution state. According to one embodiment of the present invention, the viscosity of the polyester at 40 ℃ is less than 5cps, less than 4cps, less than 3cps, less than 2cps, relative to a 15 weight percent concentration aqueous polyester solution. Wherein, the aqueous solution of polyester with 15 weight percent concentration refers to a solution of 15 weight percent polyester and 85 weight percent water mixed.
According to one embodiment of the present invention, the aromatic monomer is a dicarboxylic acid having a C5 to C12 arylene or heteroarylene group. By way of example, the above-mentioned dicarboxylic acids having arylene or heteroarylene groups of C5 to C12 may be phthalic acid, terephthalic acid, isophthalic acid. According to one embodiment of the present invention, the aliphatic monomer is a diol having a C1 to C6 alkylene group, a dicarboxylic acid having a C2 to C12 alkylene group, or a combination thereof. As an example, the diol having an alkylene group of C1 to C6 is ethylene glycol, and the dicarboxylic acid having an alkylene group of C2 to C12 is sebacic acid. In the case of polyesters, the carboxylic acid groups and the hydroxyl groups can be condensed in a ratio of 1:1, whereby as monomers having carboxylic acid groups, the above-mentioned dicarboxylic acids having arylene or heteroarylene groups of C5 to C12, dicarboxylic acids having alkylene groups of C2 to C12, or combinations thereof can be used; as the monomer having a hydroxyl group, a diol having a C1 to C6 alkylene group may be used. The arylene, heteroarylene, or alkylene group may be in a substituted or unsubstituted state, and in the substituted state, a substituent commonly known in the art such as an alkyl group of C1 to C4, an alkoxy group of C1 to C4, a halogen group, or the like may be substituted on the main chain of the arylene, heteroarylene, or alkylene group.
The above polyester may be contained in a solvent such as water, thereby being applied to the lyocell filament bundles in the form of a binder solution, and then a part or all of the solvent is removed by drying. After drying, located between the lyocell fibers to increase the stiffness of the lyocell tow. According to one embodiment of the present invention, the polyester is contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the lyocell filament yarn. Specifically, the content of the polyester may be 0.1 parts by weight or more, 0.2 parts by weight or more, 0.3 parts by weight or more, 0.4 parts by weight or more, and may be 5 parts by weight or less, 4.5 parts by weight or less, 4 parts by weight or less, 3.5 parts by weight or less, 3 parts by weight or less, 2.5 parts by weight or less, and may be 0.1 parts by weight to 5 parts by weight, 0.2 parts by weight to 4 parts by weight, 0.3 parts by weight to 3 parts by weight. When the above polyester is used in the above range, the function of the lyocell tow as a basic filter can be not reduced, and at the same time, the hardness can be increased to an appropriate level.
The above binder may contain other binder components along with the polyester. As the other binder component, for example, hydroxypropyl methylcellulose (hydroxyl propyl methyl cellulose, HPMC), hydroxypropyl cellulose (hydoroxy propyl cellulose, HPC), polyvinyl alcohol (poly vinyl alcohol, PVA), ethylene-vinyl acetate (ethylene vinyl acetate, EVA), polyvinyl acetate (poly vinyl acetate, PVAc), polyvinylpyrrolidone (poly vinyl pyrrolidone, PVP) may be used. According to one embodiment of the invention, the above-mentioned binder may comprise hydroxypropyl methylcellulose or polyvinylpyrrolidone together with the polyester, and in particular may also comprise hydroxypropyl methylcellulose. The above-mentioned adhesive may show a synergistic effect in terms of functionality as an adhesive when used together with polyester. According to one embodiment of the invention, in the above adhesive, the weight ratio of polyester to hydroxypropyl methylcellulose or polyvinylpyrrolidone is 1:1 to 1:3. Specifically, the weight ratio of polyester to hydroxypropyl methylcellulose or polyvinylpyrrolidone may be 1:1 to 1:3, 1:1.5 to 1:3, 1:2 to 1:2.5. When the above polyester is used together with other binder components, when adjusted within the above content ranges, a synergistic effect can be obtained by combining.
The cigarette filter can be manufactured by the following manufacturing method. The manufacturing method comprises the following steps: manufacturing lyocell tows by using lyocell fibers; preparing a binder solution by mixing a binder and a solvent; spraying a binder solution on the lyocell filament bundles and drying; and wrapping the dried lyocell tow with a paper wrapper to produce a cigarette filter. The above-described manufacturing method basically relates to a method of manufacturing the above-described cigarette filter, and therefore, a portion specified in the above-described matters will be omitted, and the features of the manufacturing method will be described in more detail below.
First, lyocell filament bundles are produced using a plurality of lyocell fibers. The manufactured lyocell filament bundles have bundle shapes formed by cross-linking between adjacent lyocell fibers. At this time, a step of expanding the tow by blooming (blooming) is additionally performed. When the tow is expanded by the above-described blooming step, the sprayed binder solution then easily penetrates between the lyocell fibers constituting the lyocell tow.
Thereafter, an adhesive solution is prepared by mixing an adhesive and a solvent. The binder solution is sprayed on the lyocell filament bundles to improve the functionality such as the hardness of the lyocell filament bundles. After spraying, a portion of the components of the binder solution may be lost through the drying process, and thus, the components of the binder solution may differ from the components that make up the cigarette filter. The above binder can be embodied according to the above, and the ingredients are not particularly lost even after drying, so that the amount of the lyocell tow supplied by spraying remains almost unchanged in the final cigarette filter. The solvent contains water, and a part of the water is lost during the drying process. In the case where the binder solution is prepared from only the binder and water, the portion other than the content of the binder in the binder solution is the content of water. According to one embodiment of the present invention, the above-mentioned binder is contained in an amount of 5 to 40 parts by weight based on 100 parts by weight of the binder solution. Specifically, the content of the adhesive may be 5 parts by weight or more, 6 parts by weight or more, 7 parts by weight or more, 8 parts by weight or more, 9 parts by weight or more, 10 parts by weight or more, and may be 40 parts by weight or less, 35 parts by weight or less, 30 parts by weight or less, 25 parts by weight or less, 20 parts by weight or less, and may be 5 parts by weight to 40 parts by weight, 7 parts by weight to 30 parts by weight, 10 parts by weight to 20 parts by weight. When the binder solution is formed in the above range, the above binder can be easily applied to the lyocell tow by spraying.
The binder solution prepared according to the above was sprayed in the lyocell filament bundles. The binder solution can be sprayed onto the lyocell tow to such an extent that the problem of the hardness and the like of the lyocell tow due to the material is solved without deteriorating the function of the lyocell tow as a basic filter. According to one embodiment of the present invention, the binder solution is sprayed to the lyocell filament bundles in an amount of 5 to 30 parts by weight based on 100 parts by weight of the lyocell filament bundles. Specifically, the spraying amount of the binder solution may be 5 parts by weight or more, 6 parts by weight or more, 7 parts by weight or more, 8 parts by weight or more, 9 parts by weight or more, 10 parts by weight or more, and may be 30 parts by weight or less, 28 parts by weight or less, 26 parts by weight or less, 24 parts by weight or less, 22 parts by weight or less, 20 parts by weight or less, and may be 5 parts by weight to 30 parts by weight, 7 parts by weight to 24 parts by weight, 10 parts by weight to 20 parts by weight. When the binder solution is sprayed in the above range, the functionality such as the hardness of the lyocell yarn can be improved. The method of spraying the above binder solution may use a method generally used in the art, and is not particularly limited. For example, the binder solution may be sprayed by a nozzle, brush, or electrospray.
After spraying the binder solution onto the lyocell strands, drying is performed to reduce the amount of moisture to ensure hardness. The method of drying the lyocell filament bundles may use methods generally used in the art, and is not particularly limited. When drying, for example, the drying is performed in such a manner that the amount of water sprayed initially is reduced by 30% or more.
Cigarette filters are made using a paper wrapper surrounding a dried lyocell tow. According to the requirements, the lyocell tow can be processed by using a mechanical roller or a cutter and the like to be suitable for the specifications of the cigarette filter tip.
The cigarette filter described above can be applied to smoking articles. Fig. 1 provides a diagram showing a brief structure of a smoking article according to an embodiment of the present invention. The smoking article 100 includes a smoking material portion 10 and a filter portion 20, and the cigarette filter is applied to the filter portion 20 of the smoking article 100. In the above-described smoking article 100, the smoking material section 10 is located upstream with respect to the filter section 20.
The smoking material part 10 may be filled with a smoking material such as raw tobacco leaves, platy leaves, or a mixture of tobacco leaves and platy leaves. The processed smoking material may be filled into the smoking material part 10 in a sheet form or a tobacco leaf form. The smoking material portion 10 may have a rod shape that is elongated, and the length, the circumference, and the diameter thereof are not particularly limited, but may be adjusted to a size that is generally used in the art in consideration of the filling amount of the smoking material, the preference of the user, and the like. The smoking material part 10 may include an aerosol-generating substance of at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. The smoking material portion 10 described above may contain other additives such as flavoring agents, humectants and/or acetate compounds. The aerosol-generating substance and the additive substance may be contained in a smoking substance.
The filter portion 20 is disposed downstream of the smoking material portion 10, and functions as a filter through which a user passes before inhaling the aerosol generated in the smoking material portion 10. The filter portion 20 described above may be manufactured from a variety of materials or forms. The filter portion 20 according to an embodiment of the present invention basically includes the above-described cigarette filter including a bundle of lyocell fibers bonded by an adhesive. The cigarette filter comprising lyocell tow described above may replace all or a portion of the filter portion 20 of an existing smoking article, and in the case of replacing a portion of the filter portion 20 of an existing smoking article, conventionally used filter materials may be used together. As the conventional filter material, for example, a cellulose acetate filter, a hollow tube filter, or the like can be used.
In fig. 1, a single filter in which the filter portion 20 is made of a single filter is shown, but is not limited thereto. For example, the filter portion 20 may be provided by a double filter or a triple filter having two acetate filters, or the like, in order to improve the filtering efficiency. Further, although not shown, a breakable capsule (not shown) having a structure in which a coating film surrounds a content liquid containing a flavor may be included in the filter portion 20.
The outside of the smoking material part 10 and the filter part 20 may be wrapped with wrapping paper 30a or wrapping paper 30 b.
The smoking material part 10 may be wrapped with a smoking material part wrapper 30 a. Some of the cigarette smoke generated during the combustion of the conventional smoking material segment 10 is released into the atmosphere through the smoking material segment wrapper 30a before passing through the cigarette filter, and the sidestream smoke gives an unpleasant sensation to the indirect smoker. In order to reduce such sidestream smoke, attempts have been made to add fillers such as magnesium oxide, titanium oxide, cerium oxide, aluminum oxide, calcium carbonate, zirconium carbonate, etc. to conventional cigarette paper, but when such fillers are simply applied to reduce sidestream smoke, smoke feeling is reduced, or combustion extinction, soot integrity reduction, etc. occur, it is difficult to solve the above problems by appropriately combining substances added to the fillers. In order to reduce sidestream smoke and prevent smoke from feeling, soot integrity from decreasing, and combustion from extinguishing, a smoking material portion wrapper 30a according to an embodiment of the present invention employs mixed magnesium oxide (MgO and/or Mg (OH) 2 ) Calcium carbonate (CaCO) 3 ) Is a filler of (a) for a liquid crystal display device.
The filter 20 may be wrapped with filter wrapper 30 b. The filter wrapper 30b may be made of roll paper having oil resistance, and an aluminum foil may be further included on the inner side surface of the filter wrapper 30 b.
The smoking material portion 10 wrapped with the above-described smoking material portion wrapping paper 30a and the filter portion 20 wrapped with the filter portion wrapping paper 30b may be combined and wrapped with the tipping paper 40. As shown in fig. 1, the tipping paper 40 may surround at least a portion (e.g., a downstream partial region) of the smoking material section wrapper 30a and the outer periphery of the filter section wrapper 30 b. In other words, at least a part of the smoking material section 10 and the filter section 20 are also wrapped with the tipping paper 40 and can be physically joined. According to an embodiment of the present invention, the tipping paper 40 may be manufactured from a non-porous roll paper that has not been subjected to oil resistance treatment, but is not limited thereto. The tipping paper 40 may also prevent the filter portion 20 from burning by containing a non-combustible substance, but is not limited thereto.
Modes for carrying out the invention
The constitution of the present invention and effects according to the constitution will be described in more detail below with reference to examples and comparative examples. However, the present examples are intended to more specifically explain the present invention, and the scope of the present invention is not limited to these examples.
Examples
Example 1
A lyocell tow having a tow fiber bundle of about 35000 denier was used with a lyocell fiber having a fiber of about 3.0 denier. And, a binder solution as a mixture of a binder and a solvent was prepared. Specifically, the binder solution was prepared by mixing 15 weight percent of a polyester (a copolymer of phthalic acid and sebacic acid and ethylene glycol, weight average molecular weight (M w ) =3000-6000) to 85 weight percent water. The prepared binder solution was sprayed to the lyocell filament bundles by nozzle spraying. The binder solution was sprayed 15 weight percent based on the weight of lyocell tow and dried. Cigarette filters having an axial length of about 108mm and a circumference of about 24.20mm were made using a wrapping paper around the dried lyocell tow.
Example 2
A cigarette filter was manufactured by the same method as in example 1, except that 3 weight percent of polyester and 7 weight percent of hydroxypropyl methylcellulose (Pharmacoat 606) were used instead of 15 weight percent of polyester in the binder solution.
Example 3
A cigarette filter was manufactured by the same method as in example 1, except that 3 weight percent of polyester and 7 weight percent of polyvinylpyrrolidone (K25) were used instead of 15 weight percent of polyester in the binder solution.
Comparative example 1
The binder solution was not sprayed onto the lyocell tow to produce cigarette filters.
Experimental example
Experimental example 1: hardness assessment of cigarette filters
Measurement according to example 1To 3 and comparative example 1. In order to measure the degree of disintegration of the cigarette filter by moisture, about 20 μl (22 weight percent based on the lyocell tow) of water was added to the cigarette filter by a syringe, and then the hardness of the cigarette filter after about 5 minutes was measured. In particular, when measuring the hardness of a cigarette filter, a filter hardness measuring instrument (DHT 200 of Filtrona corporation TM ) The following equation one measures.
Calculation formula one:
filter hardness (%) = [ D-a ]/d×100
Where D denotes the filter diameter and a denotes the distance (mm) from 300g of weight down (filter pressed).
TABLE 1
* Degree of moisture disintegration (%) = (1-D 2 /D 1 )×100
Wherein D is 1 Refers to the hardness (%), D before adding water 2 Refers to the hardness (%) after adding water.
According to table 1, when the binder solution contains polyester (examples 1 to 3), the hardness before adding water is 85% or more, specifically 90% or more, and the hardness after adding water is 80% or more, specifically 85% or more, showing excellent hardness. According to examples 2 and 3, when the above-mentioned polyester is used in combination with various kinds of binders such as hydroxypropyl methylcellulose and polyvinylpyrrolidone, excellent hardness can be maintained.
In the above results, the hardness after adding water was a value related to the lowest hardness until the smoker completed smoking, and when polyester was included as the binder (examples 1 to 3), the hardness was maintained at 80% or more until the smoker completed smoking, and therefore, the structure of the cigarette filter was not broken when smoking. However, in the case of using polyester alone or using a combined binder of polyester and hydroxypropyl methylcellulose (examples 1 and 2), the degree of moisture disintegration is 7% or less, specifically 6% or less, and thus, the tactile change of the cigarette filter perceived by a smoker when smoking is less.
In contrast, in the case where a binder solution such as polyester is not used (comparative example 1), a cigarette filter including lyocell tow is extremely fragile to moisture, and not only at the time of smoking, when stored under severe conditions with a certain degree of moisture, the structure may be changed, and thus, it is not preferable.
Experimental example 2: evaluation of viscosity and adhesion of adhesive solutions
The viscosity and the adhesion of the binder solutions used in examples 1 and 2 were measured and are shown in table 2 below. The above viscosity was measured at a temperature of 40℃using a Spindle No.61 device from Brookfield. The above adhesion was measured as follows: the binder solutions of example 1 (15 weight percent polyester and 85 weight percent water) and example 2 (3 weight percent polyester, 7 weight percent hydroxypropyl methylcellulose and 90 weight percent water) were applied to nonwoven fabrics, respectively, and the coated paper having a basis weight of 100gsm was laminated and dried, and then measured using a stretcher (Universal Testing Machine ST series from Tinius Olsen).
TABLE 2
Viscosity (cps) Cohesive force (gf/mm) 2 )
The adhesive solution of example 1 Below 2cps Cannot be measured(destruction of adhesive Material)
Example 2 adhesive solution 85 Cannot be measured (adhesion material failure)
According to table 2 above, in the case where the binder solution contains polyester, even as a substance having very low viscosity, high adhesion to the extent of breaking the adhesive material is shown when dried. The binder solution containing polyester has a low viscosity and is easily dispersed in an application object substance such as lyocell yarn, and thus can be uniformly dispersed, and after drying, exhibits excellent adhesion and the like, and is suitable for imparting functionality such as hardness to lyocell yarn.
While the embodiments have been described with reference to the above-described embodiments and drawings, various modifications and variations can be made by those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described methods, and/or structural elements of the described systems, structures, devices, circuits, etc. may be combined or combined in a different manner than the described methods, or substituted with other structural elements or equivalent techniques, as appropriate.
Description of the reference numerals
10: smoking material part
20: filter part
30a: smoking material part wrapping paper
30b: filter part wrapping paper
40: tipping paper
100: smoking article

Claims (11)

1. A cigarette filter, comprising:
lyocell tow made of a plurality of lyocell fibers, and
a binder for binding the lyocell fibers to each other;
the cigarette filter has a hardness of 85% or more.
2. The cigarette filter of claim 1 wherein the filter is a filter-tip filter,
the cigarette filter has a hardness of 80% or more based on 100 parts by weight of lyocell tow even when 20 to 25 parts by weight of water is added for 5 minutes.
3. The cigarette filter of claim 2 wherein the filter is a filter-tip filter,
the cigarette filter has a moisture degree of disintegration of 7% or less.
4. The cigarette filter of claim 1 wherein the filter is a filter-tip filter,
the binder comprises a polyester.
5. The cigarette filter of claim 4 wherein the filter is a filter-tip filter,
the polyester is a copolymer of an aromatic monomer and an aliphatic monomer.
6. The cigarette filter of claim 4 wherein the filter is a filter-tip filter,
the viscosity of the polyester is less than 5cps at 40 ℃ relative to a 15 weight percent concentration aqueous polyester solution.
7. The cigarette filter of claim 5 wherein the filter is a filter-tip filter,
the aromatic monomer is a dicarboxylic acid having a C5 to C12 arylene or heteroarylene group.
8. The cigarette filter of claim 5 wherein the filter is a filter-tip filter,
the above aliphatic monomer is a diol having a C1 to C4 alkylene group, a dicarboxylic acid having a C2 to C12 alkylene group, or a combination thereof.
9. The cigarette filter of claim 4 wherein the filter is a filter-tip filter,
the polyester is contained in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the lyocell filament yarn.
10. The cigarette filter of claim 4 wherein the filter is a filter-tip filter,
the adhesive also contains hydroxypropyl methylcellulose or polyvinylpyrrolidone.
11. The cigarette filter of claim 10 wherein the filter is a filter of the type comprising,
in the binder, the weight ratio of the polyester to the hydroxypropyl methylcellulose or polyvinylpyrrolidone is 1:1 to 1:3.
CN202280058477.8A 2021-12-07 2022-11-03 Cigarette filter comprising lyocell tow Pending CN117881306A (en)

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KR10-2021-0173488 2021-12-07
KR1020210173488A KR20230085383A (en) 2021-12-07 2021-12-07 Cigarette filter having lyocell tow
PCT/KR2022/017175 WO2023106644A1 (en) 2021-12-07 2022-11-03 Cigarette filter including lyocell tow

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG11201408777WA (en) 2012-07-13 2015-01-29 Philip Morris Products Sa Degradable filter for smoking articles
EP3082483B1 (en) * 2013-12-20 2019-02-06 Philip Morris Products S.a.s. Smoking article filter including degradable filter component
KR20150116612A (en) * 2014-04-08 2015-10-16 주식회사 케이티앤지 Cigarette filter, manufacturing method thereof and cigarette containing the same
TW201731397A (en) * 2016-02-29 2017-09-16 菲利浦莫里斯製品股份有限公司 Smoking article having filter with hollow tube segment
KR20160048738A (en) * 2016-04-15 2016-05-04 주식회사 케이티앤지 Cigarette filter, manufacturing method thereof and cigarette containing the same
CN109691697B (en) * 2019-03-01 2021-07-30 南通醋酸纤维有限公司 Aerosol generating product, preparation method and application

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