TW202341883A - Cigarette filter having lyocell tow and manufacturing method thereof - Google Patents

Abstract

Provided is a cigarette filter comprising: lyocell tow composed of a plurality of lyocell fibers; and a binder binding the lyocell fibers to each other. The cigarette filter according to one embodiment of the present invention reduces 70% by weight to 95% by weight of tar and nicotine, respectively, due to cigarette smoke. The cigarette filter according to one embodiment of the present invention has resistance of suction in smoking of 80mmWG to 200mmWG. In the cigarette filter according to one embodiment of the present invention, the lyocell tow is filled in the cigarette filter at a packing density of 0.2 g/mL to 0.6 g/mL. The cigarette filter according to one embodiment of the present invention solves the material problems of the lyocell tow, such as hardness, and furthermore has excellent filtration functionality as a filter.

Description

Cigarette filter including lyocell tow and method of making same

The present invention relates to a cigarette filter including lyocell tow and a manufacturing method thereof. Specifically, it relates to a cigarette filter and a manufacturing method thereof, which include lyocell tow and a binder and have excellent tar and nicotine reduction effects.

Generally, in order to manufacture cigarettes, various leaf tobaccos are first blended and processed to have a desired flavor. After that, the processed tobacco leaves are cut to produce cut tobacco leaves, and the tobacco leaves are rolled with cigarette paper to obtain filter-less cigarettes. After that, the filter is attached to the cigarette without a filter tip according to the demand.

Cigarette paper can be made of flax, wood pulp, etc. When burned, it needs to maintain combustibility and the smell of cigarettes. Cigarette filters may include activated carbon, flavoring substances, etc., may be composed of a single filter or multiple filters, and may be surrounded by cigarette filter wrapping paper. The tobacco shredded part and the cigarette filter are connected by tipping paper, which may include fine holes.

Conventional cigarette filters use cellulose acetate tow (tow) in which cellulose is extracted from wood pulp and acetylated. As a material to replace it, for example, the following tow is being developed: unlike cellulose acetate, the fiber is The lyocell fiber itself is fibrillated.

When manufacturing a cigarette filter from a tow using the above-mentioned Lyocell fiber, it is not suitable because the hardness of the cigarette filter is low. In order to be used as a cigarette filter, the hardness needs to be increased above a certain level. For example, methods for improving the hardness of the filter include a method of using a curing agent and a method of using a plasticizer. The method of using the above-mentioned curing agent is a method of hardening the filter by joining fiber filaments with a substance having adhesive properties to impart hardness to the filter. The method of using the above-mentioned plasticizer is a method of partially dissolving or plasticizing the fibers themselves using a specific substance to form joints between the fibers, and then plasticizing the fibers. Existing cellulose acetate uses plasticizers (Triacetin, Triethyl Citrate), but lyocell fiber currently does not have plasticizers, so curing agents are mainly used to increase hardness. .

As mentioned above, even if the physical properties of lyocell fiber are improved due to insufficient hardness and the like by using additional additives, unlike cellulose acetate whose functionality has been confirmed as a cigarette filter, when the new material lyocell is used When using Sayer fiber as an actual cigarette filter, the filtering functionality of the cigarette filter itself needs to be explored.

The inventors of the present invention recognized the technical problem of filtering functionality of cigarette filters using Lyocell fiber, and in order to ensure this functionality, they continued to study solutions for more appropriate application of Lyocell fiber, thereby completing the present invention.

technical issues

As an environmentally friendly material, a cigarette filter including a lyocell tow is provided, which solves material problems such as hardness that the lyocell tow basically has, thereby improving the filtration functionality of the filter.

Technical solution

According to a first aspect of the present invention, the present invention provides a cigarette filter, which includes: a Lyocell tow made of a plurality of Lyocell fibers; and an adhesive that combines the above-mentioned Lyocell fibers with each other.

In a specific example of the present invention, the above-mentioned cigarette filter reduces tar and nicotine transferred from tobacco smoke by 70 to 95 weight percent respectively.

In a specific example of the present invention, the above-mentioned cigarette filter has an inhalation resistance of 80 mmWG to 200 mmWG.

In a specific example of the present invention, the above-mentioned Lyocell tow is filled into the cigarette filter with a filling density of 0.2g/mL to 0.6g/mL.

In a specific example of the present invention, the above-mentioned binder is hydroxypropyl methylcellulose, hydroxypropyl cellulose, polyvinyl alcohol, ethylene vinyl acetate, polyvinyl acetate, polyvinylpyrrolidone, polyester or they combination.

In a specific example of the present invention, based on 100 parts by weight of lyocell tow, 0.1 to 5 parts by weight of the above-mentioned adhesive is included.

In a specific example of the present invention, the above-mentioned cigarette filter further includes a binder solvent, and the above-mentioned binder solvent is water, monohydric alcohol, polyhydric alcohol or a combination thereof.

In a specific example of the present invention, the above-mentioned monohydric alcohol is methanol, ethanol, propanol or a combination thereof.

In a specific example of the present invention, the above-mentioned polyol is a diol having C1 to C4 alkylene.

In a specific example of the present invention, based on 100 parts by weight of lyocell tow, 0.5 to 25 parts by weight of the above-mentioned polyol is included.

According to a second aspect of the present invention, the present invention provides a method for manufacturing the above-mentioned cigarette filter. The above-mentioned manufacturing method includes the following steps: using a plurality of Lyocell fibers to manufacture Lyocell tows; and preparing the adhesive by mixing an adhesive and a solvent. agent solution; spraying the adhesive solution onto the above-mentioned Lyocell tow and drying; and using rolling paper to surround the Lyocell fiber and combine it with the adhesive to form a cigarette filter.

Invention effect

A cigarette filter according to a specific example of the present invention includes environmentally friendly material Lyocell tow, and overcomes the material problems of conventional Lyocell tow and has excellent hardness.

A cigarette filter according to a specific example of the present invention has a better tar and nicotine reducing effect than conventional cellulose acetate cigarette filters.

This tar and nicotine reduction effect can be achieved by simply replacing the cigarette without adjusting other components such as the smoking substance part or rolling paper when manufacturing a cigarette that transfers tar and nicotine below a certain level according to the smoker's preference. A specific example of a cigarette filter is invented to reduce tar and nicotine. Therefore, when producing this product, the processability, etc. can be improved.

Specific examples will be described in detail below with reference to the drawings. It should be noted that when the structural elements of each drawing are given reference signs, even if they appear in different drawings, the same reference signs should be given to the same structural elements as much as possible. Furthermore, when describing a specific example, if it is judged that a detailed description of a related conventional structure or function hinders understanding of the specific example, the detailed description will be omitted.

When describing the structural elements of specific examples, terms such as first, second, A, B, (a), (b), etc. may be used. Such terminology is only used to distinguish one structural element from another structural element, and the nature, order or sequence of the corresponding structural element is not limited to its terminology. It should be understood that when a structural element is described as "connected", "combined" or "connected" to another structural element, the structural element can be directly connected or connected with another structural element, or it can also be connected between each structural element. There are other structural elements between "connection", "combination" or "joint".

Structural elements having a common function with structural elements included in one specific example will be described using the same names in another specific example. Unless otherwise stated, the description described in one specific example can also be applied to other embodiments, and specific description will be omitted within the scope of repetition.

In the present invention, the term "smoking article" refers to aerosol-generating items such as cigarettes (cigarettes) and cigars. Smoking articles may include an aerosol-generating substance or an aerosol-forming matrix. Furthermore, smoking products may include solid materials based on cigarette raw materials such as leaf tobacco, tobacco leaves, recombinant tobacco, etc. Smoking substances may include volatile compounds. The above-mentioned smoking article may include several segments with respective functionalities, such segments being represented by "... segments". In the present invention, the smoking article is not only a combustion type cigarette, but may also be a heated cigarette used together with an aerosol generating device (not shown) such as an electronic cigarette device.

In the present invention, the terms "upstream" and "downstream" are terms indicating the relative positions of the plurality of segments constituting the smoking article based on the direction in which a user inhales air using the smoking article. The smoking article includes an upstream end (i.e., an air inlet portion) and an opposite downstream end (i.e., an air outlet portion). When using the smoking article, the user can bite the downstream end of the smoking article. The downstream end is located downstream of the upstream end; furthermore, the term "end" may also be described by "terminal".

The present invention relates to a cigarette filter that can be applied to smoking products. According to a specific example of the present invention, the above-mentioned cigarette filter includes: a lyocell tow (tow), which is made of a plurality of lyocell fibers; and adhesive agent, which binds the above-mentioned lyocell fibers to each other. The above-mentioned lyocell fiber is an environmentally friendly fiber made from cellulose extracted from wood pulp. The above-mentioned Lyocell fiber bundle refers to a bundle formed by cross-connection between adjacent Lyocell fibers. According to a specific example of the present invention, the above-mentioned Lyocell fiber may have a fineness of 1.0 denier to 12.0 denier. According to a specific example of the present invention, the Lyocell fiber bundle constituting the Lyocell fiber bundle may have a fineness of 15,000 to 45,000 denier. By mixing a binder suitable for the above-mentioned Lyocell fiber with a solvent to prepare a binder solution, spraying the solution onto the Lyocell tow and then drying it, the Lyocell tow can be formed into a fiber with a hardness above a certain level. Structure.

The cigarette filter according to one specific example of the present invention has an excellent effect of reducing tar and nicotine transferred from tobacco smoke. Cellulose acetate is a material that has been used as a cigarette filter material for a long time in the technical field of the present invention. The performance of cigarette filters using cellulose acetate can be used as one of the standards for evaluating the performance of cigarette filters in this technical field. In a cigarette filter of one specific example of the present invention, when manufactured with the same inhalation resistance, compared to a cigarette filter using cellulose acetate, the tar and nicotine reduction effect is excellent. Specifically, in the smoke passing through the cigarette filter, Based on the content of cigarette filters using cellulose acetate, the tar and nicotine components are less than 90% by weight. From the characteristics of the material, it cannot be considered that the tar and nicotine component reduction effect of lyocell fiber material must be better than that of cellulose acetate material. Therefore, the cigarette filter of a specific example of the present invention has technical significance in the technical field of the present invention. .

A cigarette filter according to a specific example of the present invention reduces tar and nicotine transferred from tobacco smoke by 70 to 95 weight percent respectively. The above reduction ratio is a value comparing the weight of tar and nicotine in tobacco smoke before and after passing through the cigarette filter. Specifically, the reduction ratio of tar and nicotine can be above 70 weight percent, above 72 weight percent, above 74 weight percent, above 76 weight percent, above 78 weight percent, above 80 weight percent, above 82 weight percent, or above 84 weight percent. , 86 weight percent or more, and can be 95 weight percent or less, 94 weight percent or less, 93 weight percent or less, 92 weight percent or less, 91 weight percent or less, or 90 weight percent or less. When the tar and nicotine in tobacco smoke are reduced to the above ranges, a composition suitable for smokers to smoke can be achieved.

The cigarette filter according to a specific example of the present invention has an inhalation resistance of 80 mmWG to 200 mmWG. The above suction resistance refers to the static pressure difference between the two ends of the sample when the volumetric flow rate is traversed by the air flow at the discharge end at 17.5 mm per second under normal conditions. The above suction resistance can be measured by the method specified in ISO standard 6565:2002. Specifically, the above-mentioned air suction resistance can be above 80mmWG, above 85mmWG, above 90mmWG, above 95mmWG, above 100mmWG, and below 200mmWG, below 190mmWG, below 180mmWG, below 170mmWG, below 160mmWG, below 150mmWG, and can be from 80mmWG to 200mmWG. , 90mmWG to 180mmWG, 100mmWG to 150mmWG. Within the above range, the functionality of the cigarette filter including the lyocell tow in reducing tar and nicotine can be further improved.

In the cigarette filter of a specific example of the present invention, the lyocell tows are filled into the cigarette filter at a filling density of 0.2g/mL to 0.6g/mL. As the filling density of lyocell tow increases, the hardness or filtration performance of the filter can be improved, but it may block the air flow path in the cigarette, so it needs to be adjusted to an appropriate level. Specifically, the above-mentioned filling density may be 0.2g/mL or more, 0.22g/mL or more, 0.24g/mL or more, 0.26g/mL or more, 0.28g/mL or more, 0.3g/mL or more, and may be 0.6g/mL. mL or less, 0.58g/mL or less, 0.56g/mL or less, 0.54g/mL or less, 0.52g/mL or less, 0.5g/mL or less, and can be 0.2g/mL to 0.6g/mL, 0.24g/mL to 0.56g/mL, 0.3g/mL to 0.5g/mL. Within the above range, the functionality of the cigarette filter including the lyocell tow in terms of reducing tar and nicotine can be further improved.

The above filling density not only takes into account the tar and nicotine reducing effect of the cigarette filter, but also takes into account the inhalation resistance. However, at this filling density, the hardness of the cigarette filter may be lower, so a separate hardness enhancer is required. As a type of hardness improving agent, a binder can be used, which binds lyocell fibers to each other to impart a hardness above a certain level to the lyocell tow. The above-mentioned binder is a substance suitable for application to lyocell fiber, and can be freely used as long as it is a conventional substance well known in the technical field of the present invention. According to a specific example of the present invention, the above-mentioned adhesive can use hydroxyl propyl methyl cellulose (HPMC), hydroxypropyl cellulose (hydroxy propyl cellulose (HPC)), polyvinyl alcohol (polyvinyl alcohol, PVA), ethylene vinyl acetate (EVA), polyvinyl acetate (PVAc), polyvinyl pyrrolidone (PVP), polyester (polyester) or a combination thereof, specifically Specifically, the above-mentioned binder may use hydroxypropyl methylcellulose, polyester or a combination thereof.

The above-mentioned polyester is a synthetic resin formed by the reaction of polyvalent organic acids and polyols, and has appropriate resistance to water and various compounds. According to a specific example of the present invention, the above-mentioned polyester is a copolymer of aromatic monomers and aliphatic monomers. The above-mentioned aromatic monomers impart structural stability to the polyester, and the above-mentioned aliphatic monomers impart structural flexibility to the polyester. Therefore, polyesters including the above-mentioned aromatic monomers and aliphatic monomers are easily combined with, for example, lyocell Other components such as fibers are bonded together to impart functionality as a binder. The above-mentioned aromatic monomer may be a polyvalent organic acid or polyhydric alcohol, and similarly, the above-mentioned aliphatic monomer may also be a multivalent organic acid or polyhydric alcohol.

According to a specific example of the present invention, the above-mentioned aromatic monomer is a dicarboxylic acid having a C5 to C12 arylene group or heteroarylene group. As an example, the dicarboxylic acid having a C5 to C12 arylene group or heteroarylene group may be phthalic acid, terephthalic acid, or isophthalic acid. According to a specific example of the present invention, the aliphatic monomer is a diol having an alkylene group from C1 to C6, a dicarboxylic acid having an alkylene group from C2 to C12, or a combination thereof. As an example, the diol having an alkylene group from C1 to C6 is ethylene glycol, and the dicarboxylic acid having an alkylene group from C2 to C12 is sebacic acid. In the case of polyester, carboxylic acid groups and hydroxyl groups can be formed by condensation reaction at a ratio of 1:1. Therefore, as the monomer having a carboxylic acid group, the above-mentioned arylene group or arylene group having C5 to C12 can be used. A heteroaryl dicarboxylic acid, a dicarboxylic acid having a C2 to C12 alkylene group, or a combination thereof; as the monomer having a hydroxyl group, a diol having a C1 to C6 alkylene group can be used. The above-mentioned arylene group, heteroarylene group or alkylene group exists in a substituted or unsubstituted state. In the substituted state, on the main chain of the arylene group, heteroarylene group or alkylene group, C1 to C4 Substituents generally known in the art, such as alkyl groups, C1 to C4 alkoxy groups, and halo groups, may be substituted.

The above-mentioned adhesive can be applied to the lyocell tow in the form of an adhesive solution together with a solvent. After the above-mentioned adhesive is applied, the above-mentioned adhesive will not leak even if the lyocell tow is dried or left for a long time, and the above-mentioned adhesive Located between lyocell fibers to increase the stiffness of the lyocell tow. According to a specific example of the present invention, based on 100 parts by weight of lyocell tow, 0.1 to 5 parts by weight of the above-mentioned adhesive is included. Specifically, the content of the above-mentioned adhesive may be more than 0.1 parts by weight, more than 0.2 parts by weight, more than 0.3 parts by weight, or more than 0.4 parts by weight, and may be less than 5 parts by weight, less than 4.5 parts by weight, less than 4 parts by weight, or less than 3.5 parts by weight. Below, 3 parts by weight or below, 2.5 parts by weight or below, it may be 0.1 to 5 parts by weight, 0.2 to 4 parts by weight, or 0.3 to 3 parts by weight. When the above-mentioned adhesive is applied in the above-mentioned range, the function of the lyocell tow as a basic filter can not be reduced, and at the same time, the hardness can be increased to an appropriate level.

The solvent contained in the cigarette filter is basically contained in the binder solution in order to disperse the binder. When the binder solution is sprayed onto the lyocell tow and then dried or left for a long time, part of the solvent is removed. As a solvent for the above-mentioned binder solution, water can basically be used. To dissolve the adhesive, a large amount of water can be used relative to the adhesive, but most of the water is dried and removed. Unlike cellulose acetate, which is based on hydrophobicity, the above-mentioned lyocell fibers are known to be hydrophilic and therefore moisture can have a negative impact on the hardness. In order to compensate for this, the above-mentioned binder solution may be used together with water, or an alcohol component or the like may be used instead of water.

According to a specific example of the present invention, the above-mentioned solvent includes methanol, ethanol, propanol or a monohydric alcohol as a combination thereof. The above-mentioned monohydric alcohol is a component that is more volatile than water. After drying, a large amount of the above-mentioned monohydric alcohol is lost. However, when the drying process is not performed and the monohydric alcohol is stored at room temperature, an amount above the prescribed level can be detected in the final cigarette filter. The above-mentioned monohydric alcohol. The above-mentioned monohydric alcohol can replace water in the solvent of the binder solution. Therefore, it not only helps to improve the hardness of the cigarette filter, but also has bactericidal power. Therefore, when applied to Lyocell tow, it can exhibit additional functionality. . According to a specific example of the present invention, based on 10,000 parts by weight of lyocell tow, 1 to 500 parts by weight of the above-mentioned monohydric alcohol is included. The volatility of the above-mentioned monohydric alcohol is higher than that of polyhydric alcohol or water. Therefore, the content of the above-mentioned monohydric alcohol fluctuates greatly. However, when the drying process is reduced and stored at room temperature according to a specific example of the present invention, compared with not adding In the case of monohydric alcohols, monohydric alcohols above a predetermined level can be detected. Therefore, within the above content range, the lower limit is more meaningful than the upper limit.

According to a specific example of the present invention, the above-mentioned solvent includes polyhydric alcohol. Among them, polyol refers to a compound containing two or more hydroxyl groups. When the lyocell tow is processed by a mechanical roller or the like in order to apply it to a cigarette filter, the above-mentioned polyol functions as a release agent. Specifically, when lyocell tow is processed by a mechanical roller or the like without a release agent, the lyocell tow may be caught in the mechanical roller or the like due to the adhesive force of the adhesive, including polyols. Lyocell tow will reduce this phenomenon, thereby improving processability. Moreover, when the above-mentioned polyol is applied to Lyocell tow, even if it is not dried at a particularly high temperature for a long time, it can still be located between the Lyocell fibers together with the binder, thereby helping to improve the lyocell quality in a short time. The hardness of the Sayer tow. Accordingly, when a solvent containing a polyol is used, the drying time can be significantly shortened, and the manufacturing processability of the cigarette filter can be improved.

According to a specific example of the present invention, the above-mentioned polyol is a glycol having an alkylene group from C1 to C4. The above-mentioned diol refers to a compound having two hydroxyl groups, and is also called glycol. The above two hydroxyl groups may be connected by a C1 to C4 alkylene group, where the number of carbon atoms in the alkylene group refers to the number of carbon atoms directly connected between the two hydroxyl groups. The above-mentioned alkylene group exists in a substituted or unsubstituted state. In the case of substitution, in the main chain of the alkylene group, a C1 to C3 alkyl group, a C1 to C3 alkoxy group, a halo group, etc. Technical field of the present invention Generally known substituents may be substituted. According to a specific example of the present invention, the above-mentioned polyhydric alcohol may be propylene glycol. The above-mentioned propylene glycol is a polyol having a chain of appropriate length, and may be a more preferred compound having the above-mentioned functionality.

The above-mentioned polyols can be applied to Lyocell tow in the form of a binder solution together with binders and other solvents, and remain unchanged in the Lyocell tow or the cigarette filter in which it is applied before and after drying, so that it can Provides the above-mentioned functionality including improved processability including hardness. According to a specific example of the present invention, based on 100 parts by weight of lyocell tow, 0.5 to 25 parts by weight of the above-mentioned polyol is included. Specifically, the content of the above-mentioned polyol can be more than 0.5 parts by weight, more than 0.6 parts by weight, more than 0.7 parts by weight, more than 0.8 parts by weight, more than 0.9 parts by weight, more than 1 part by weight, and can be less than 25 parts by weight or 20 parts by weight. parts by weight or less, 15 parts by weight or less, 10 parts by weight or less, 5 parts by weight or less, and may be 0.5 to 10 parts by weight, 0.7 to 7 parts by weight, or 1 to 5 parts by weight. When the above-described polyol is used in the above-described range, additional functionality can be imparted to the cigarette filter without reducing the performance of the lyocell tow as a basic filter.

A cigarette filter including Lyocell tows according to a specific example of the present invention has excellent hardness through bonding with an adhesive. According to a specific example of the present invention, the above-mentioned cigarette filter has a hardness of more than 85%. Specifically, the hardness of the above-mentioned cigarette filter can be above 85%, above 86%, above 87%, above 88%, or above 89%. The hardness of the cigarette filter is a value that quantifies the degree of diameter retention of the cigarette filter when the cigarette filter is pressed with a certain level of force in the vertical direction. Specifically, it can be calculated by the following calculation formula 1.

Calculation formula 1:

Filter hardness (%)=[D-a]/D×100;

Among them, D represents the filter diameter (mm), and a represents the distance (mm) that the 300g weight falls (the filter is pressed). When calculating the hardness of the above-mentioned cigarette filter, the required measurement value can be obtained by using a device commonly used in this technical field. For example, DHT 200TM of Filtrona Company can be used. When measuring hardness, the force applied takes into account the force exerted by an actual smoker holding the cigarette. The hardness value of more than 85% obtained by the cigarette filter of one specific example of the present invention has technical significance in the following aspects: using environmentally friendly material lyocell tow, ensuring a level that can replace conventional cigarette filters made of cellulose acetate hardness. Moreover, the cigarette filter of a specific example of the present invention does not undergo a drying process under high temperature conditions, but can also achieve an excellent hardness value of more than 85% as mentioned above under normal temperature conditions after a time for the adhesive to be fixed. Therefore, It can significantly improve the processability when manufacturing products.

The above-mentioned cigarette filter can be manufactured by the following manufacturing method. The above-mentioned manufacturing method includes the following steps: manufacturing Lyocell tows using Lyocell fibers; preparing a binder solution by mixing a binder and a solvent; spraying the binder solution onto the above-mentioned Lyocell tows and drying; and surrounding them with rolling paper Lyocell fibers are combined into lyocell tows with adhesives to make cigarette filters. The above-mentioned manufacturing method basically relates to a method for manufacturing the above-mentioned cigarette filter. Therefore, the specific parts in the above content will be omitted, and the features of the manufacturing method will be described in more detail below.

First, a lyocell tow is produced using multiple lyocell fibers. The produced lyocell filament bundle has a bundle shape formed by cross-connection between adjacent lyocell fibers. At this time, a step of expanding the tow by blooming is additionally performed. When the tow is expanded through the above-mentioned blooming step, the adhesive solution sprayed thereafter easily penetrates between the lyocell fibers constituting the lyocell tow.

Afterwards, a binder solution is prepared by mixing the binder and solvent. The above-mentioned binder solution is sprayed on the lyocell tow in order to improve the functionality such as the hardness of the lyocell tow. After spraying, a portion of the components of the binder solution may be lost through the drying process, and therefore the composition of the binder solution may be different from the components constituting the cigarette filter. The above-mentioned binder can be embodied as described above, and the components are not particularly lost after drying. Therefore, the amount of lyocell supplied to the lyocell tow by spraying remains almost unchanged in the final cigarette filter. The above solvent contains water, part of which is lost during the drying process. When a binder solution is prepared from only a binder and water, the portion in the binder solution other than the content of the binder is the content of water. According to a specific example of the present invention, based on 100 parts by weight of the adhesive solution, the solution contains 5 to 40 parts by weight of the above-mentioned adhesive. Specifically, the content of the above-mentioned adhesive can be more than 5 parts by weight, more than 6 parts by weight, more than 7 parts by weight, more than 8 parts by weight, more than 9 parts by weight, more than 10 parts by weight, and can be less than 40 parts by weight or 35 parts by weight. Below, 30 parts by weight or below, 25 parts by weight or below, 20 parts by weight or below, and may be 5 to 40 parts by weight, 7 to 30 parts by weight, or 10 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.

When the above-mentioned solvent contains a polyhydric alcohol, the above-mentioned solvent contains a polyhydric alcohol and water. In the case where the entire solvent is composed of polyol, the viscosity is too high and it is difficult to disperse the adhesive. Water can be contained in the same amount as the balance of the solvent such as polyol, and a part of it is lost during the drying process. According to a specific example of the present invention, based on 100 parts by weight of the adhesive solution, 5 to 50 parts by weight of the above-mentioned polyol is included. Specifically, the content of the above-mentioned polyol can be more than 5 parts by weight, more than 6 parts by weight, more than 7 parts by weight, more than 8 parts by weight, more than 9 parts by weight, more than 10 parts by weight, and can be less than 50 parts by weight and 45 parts by weight. parts by weight or less, 40 parts by weight or less, 35 parts by weight or less, 30 parts by weight or less, and may be 5 to 50 parts by weight, 7 to 40 parts by weight, or 10 to 30 parts by weight. When the above polyol is used in the above range, additional functionality can be imparted to the cigarette filter without reducing the function of the lyocell tow as a basic filter.

The above solvent may also contain a monohydric alcohol. The above-mentioned monohydric alcohol is a component that is more volatile than water. After drying, a large amount of the above-mentioned monohydric alcohol is lost. However, when stored at room temperature without drying, a certain level or more can be detected in the final cigarette filter. The above-mentioned monohydric alcohol is a component that can replace water in the solvent of the binder solution and can adjust the water content of the final cigarette filter. According to a specific example of the present invention, the above-mentioned monohydric alcohol is methanol, ethanol, propanol or a combination thereof. Specifically, the above-mentioned monohydric alcohol may be ethanol.

In place of water, a certain level or more of the above-mentioned monohydric alcohol may be included. According to a specific example of the present invention, based on 100 parts by weight of the adhesive solution, the solution contains 5 to 60 parts by weight of the above-mentioned monohydric alcohol. Specifically, the content of the above-mentioned monohydric alcohol can be more than 5 parts by weight, more than 6 parts by weight, more than 7 parts by weight, more than 8 parts by weight, more than 9 parts by weight, more than 10 parts by weight, and can be less than 60 parts by weight and 55 parts by weight. part by weight or less, 50 parts by weight or less, 45 parts by weight or less, 40 parts by weight or less, 35 parts by weight or less, 30 parts by weight or less, and may be 5 to 60 parts by weight, 7 to 45 parts by weight, 10 to 10 parts by weight 30 parts by weight. When the above-mentioned monohydric alcohol is used in the above-mentioned range, the water content in the cigarette filter can be reduced by an effectively meaningful value.

Spray the adhesive solution prepared as above into the lyocell tow. The above-mentioned binder solution can be sprayed onto the lyocell tow to an extent that solves problems such as hardness of the lyocell tow due to the material thereof without reducing the basic function of the lyocell tow as a filter. According to a specific example of the present invention, based on 100 parts by weight of the lyocell tow, 5 to 30 parts by weight of the above-mentioned adhesive solution is sprayed onto the lyocell tow. Specifically, the spray amount of the above-mentioned adhesive solution can be more than 5 parts by weight, more than 6 parts by weight, more than 7 parts by weight, more than 8 parts by weight, more than 9 parts by weight, more than 10 parts by weight, and can be less than 30 parts by weight, 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 can be 5 to 30 parts by weight, 7 to 24 parts by weight, or 10 to 20 parts by weight. . When the above-mentioned binder solution is sprayed in the above-mentioned range, the functionality such as the hardness of the lyocell tow can be improved. The method of spraying the above-mentioned adhesive solution can be a method commonly used in the technical field of the present invention, and is not particularly limited. For example, the above-mentioned spray of the adhesive solution can be sprayed by a nozzle, a brush, or an electrospray.

After the adhesive solution is sprayed onto the lyocell tow, it is dried in such a manner that the adhesive is fixed and the lyocell fibers are bonded to each other through the adhesive. This drying process can be performed under normal temperature or high temperature conditions by conventional methods in the technical field of the present invention. Cigarette filters are made by using rolled paper to surround Lyocell fibers and combine them with adhesives to form Lyocell tows. Depending on the requirements, the above-mentioned Lyocell tows can be processed using mechanical rollers or cutting machines with specifications suitable for use in cigarette filters. The degree to which the cigarette filter is filled with Lyocell tows can be adjusted based on the above.

The above-mentioned cigarette filter can be applied to smoking articles. Figure 1 provides a diagram showing the schematic structure of a smoking article of a specific example of the present invention. The above-mentioned smoking article 100 includes a smoking substance part 10 and a filter part 20. The above-mentioned cigarette filter is applied to the filter part 20 of the smoking article 100. In the smoking article 100 described above, the smoking substance portion 10 is located upstream of the filter portion 20 .

The smoking substance part 10 may be filled with a smoking substance such as raw tobacco leaves, plate leaves, or a mixture of tobacco leaves and plate leaves. The processed smoking substance can be filled into the smoking substance portion 10 in the form of sheets or tobacco leaves. The above-mentioned smoking substance part 10 may have a long and extended rod shape, and its length, circumference and diameter are not particularly limited, but can be adjusted to the technical field of the present invention by taking into account the filling amount of the smoking substance, the user's preference, etc. Commonly used sizes. The smoking substance part 10 may contain at least one aerosol-generating substance selected from the group consisting of glycerol, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. The smoking substance portion 10 may contain other additives such as flavoring agents, humectants and/or acetate compounds. The above-mentioned aerosol generating substances and additive substances may be included in the smoking substance.

The filter unit 20 is arranged downstream of the smoking substance unit 10 and functions as a filter that passes aerosol substances generated in the smoking substance unit 10 before a user inhales them. The above-mentioned filter part 20 can be made of various materials or forms. The filter part 20 of a specific example of the present invention basically includes the above-mentioned cigarette filter, and the above-mentioned cigarette filter includes a plurality of Lyocell tows formed by binding a plurality of Lyocell fibers through an adhesive. The above-mentioned cigarette filter including Lyocell tows can replace all or part of the filter part 20 of the existing smoking article. When replacing part of the filter part 20 of the existing smoking article, previously used filter materials can be used together. In the past, filter materials such as cellulose acetate filters, hollow tube filters, etc. can be used.

Although FIG. 1 shows a single filter in which the filter part 20 is made of a single filter, it is not limited to this. For example, in order to improve the filtration efficiency, the filter part 20 may be provided with a double filter or a triple filter having two acetate filters. Furthermore, although not shown in the figure, the inside of the filter part 20 may include a breakable capsule (not shown) having a structure of surrounding a content liquid with a membrane, and the content liquid includes a fragrance.

The exteriors of the smoking substance part 10 and the filter part 20 may be wrapped by the smoking substance part wrapping paper 30a or the filter part wrapping paper 30b.

The above-mentioned smoking substance part 10 can be packaged by the smoking substance part wrapping paper 30a. Part of the cigarette smoke generated during the normal combustion process of the smoking substance part 10 is released into the atmosphere through the smoking substance part wrapper 30a before passing through the cigarette filter. The side flow smoke brings unpleasantness to indirect smokers. In order to reduce this kind of side flow smoke, attempts have been made to add filling materials such as magnesium oxide, titanium oxide, cerium oxide, aluminum oxide, calcium carbonate, zirconium carbonate, etc. to conventional cigarette papers. However, when such filling materials are simply applied to reduce side flow smoke, When smoke flows, the smoking sensation is reduced, or combustion extinguishing occurs, soot integrity is reduced, etc. It is difficult to solve the above problems by appropriately combining substances added to the filling material. In order to reduce the sidestream smoke while preventing the smoking sensation, the reduction of soot integrity and combustion extinguishment, the smoking substance part wrapping paper 30a of a specific example of the present invention uses mixed magnesium oxide (MgO and/or Mg(OH) ₂ ) and Calcium carbonate (CaCO ₃ ) filler.

The above-mentioned filter part 20 can be packaged by the filter part wrapping paper 30b. The filter tip wrapping paper 30b may be made of oil-resistant rolled paper, and the inner side of the filter tip wrapping paper 30b may further include aluminum foil.

The smoking substance portion 10 wrapped in the smoking substance portion wrapping paper 30a and the filter tip portion 20 wrapped in the filter tip portion wrapping paper 30b can be combined and packaged through the tipping paper 40. As shown in FIG. 1 , the tipping paper 40 may surround at least a part of the smoking substance part wrapping paper 30 a (for example, a downstream part of the area) and the periphery of the filter part part wrapping paper 30 b. In other words, at least a part of the smoking substance part 10 and the filter part 20 are also packaged by the tipping paper 40 and can be physically combined. According to a specific example of the present invention, the above-mentioned plugging paper 40 can be made of non-porous roll paper without oil-resistant treatment, but it is not limited thereto. Furthermore, the tipping paper 40 may contain a non-combustible substance to prevent the filter part 20 from burning, but is not limited thereto.

A specific example of the smoking product of the present invention has a tar transfer amount of less than 3.7 mg and a nicotine transfer amount of less than 0.36 mg. This is lower than the amount of tar and nicotine transferred using a cellulose acetate filter. Specifically, the tar transfer amount may be less than 3.7 mg, 3.6 mg or less, 3.5 mg or less, 3.4 mg or less, 3.3 mg or less, 3.2 mg or less, and the nicotine transfer amount may be less than 0.36 mg, 0.35 mg or less, 0.34 mg or less, or 0.33 mg. mg below, 0.32mg below, 0.31mg below, 0.3mg below, 0.29mg below. The smoking article of one specific example of the present invention is significant in that its tar and nicotine reducing effect is superior to that of a cellulose acetate filter.

Hereinafter, the structure of this invention and the effect based on it are demonstrated in more detail using Examples and Comparative Examples. However, this Example is used to demonstrate this invention more concretely, and the scope of this invention is not limited to these Examples.

Example

Example 1

One fiber of Lyocell fiber is about 3.0 denier, and the tow fiber bundle is about 35,000 denier. Furthermore, a binder solution as a mixture of a binder and a solvent was prepared. Specifically, based on the total weight of the adhesive solution, the above adhesive solution is made by adding 15 weight percent of polyester (copolymer of phthalic acid, sebacic acid and ethylene glycol, weight average molecular weight (M _w ) = 3000 ~6000) was added to 85% by weight of solvent (a mixed solvent of 30% by weight of propylene glycol and 55% by weight of water). Spray the prepared adhesive solution onto the lyocell tow through a nozzle spray. Based on the weight of the lyocell tow, 15% by weight of the above-mentioned adhesive solution was sprayed, and stored under normal temperature conditions for 6 hours, thereby producing a lyocell tow containing the adhesive. The produced lyocell tow was wrapped with rolling paper, thereby producing a cigarette filter with an axial length of approximately 27 mm and a circumference of approximately 23.7 mm. In the above-mentioned cigarette filter, the lyocell tow has a filling density of about 0.4 g/mL. At this time, the lyocell tow refers to a state that does not contain a binder. When measured by an inhalation resistance measuring device (manufacturing company: KARDIEN, product name: BWSPtHT-1), the measured inhalation resistance of the above-mentioned cigarette filter is approximately 112.5 mmWG.

Comparative example 1

Cellulose acetate tow of the same denier condition was used instead of lyocell tow. As a hardness enhancer, Triethyl citrate (TEC) is used as a plasticizer instead of the adhesive. Spray the above-mentioned plasticizer onto the cellulose acetate tow through nozzle spraying. The above plasticizer solution was sprayed at 7% by weight based on the weight of the cellulose acetate tow, thereby producing a cellulose acetate tow containing a plasticizer. The produced cellulose acetate tow was wrapped with rolling paper to produce a cigarette filter with an axial length of approximately 27 mm and a circumference of approximately 24.2 mm. In the above-mentioned cigarette filter, the cellulose acetate tow has a filling density of approximately 0.36 g/mL. In this case, the cellulose acetate tow refers to a state that does not contain a plasticizer. When measured by an inhalation resistance measuring device (manufacturing company: KARDIEN, product name: BWSPtHT-1), the measured inhalation resistance of the above-mentioned cigarette filter is approximately 112.5 mmWG.

Experimental example

The smoking substance part is made using 580 mg of cigarette tobacco leaves. Cigarettes were manufactured by combining each of the cigarette filters manufactured in Example 1 and Comparative Example 1 with the smoking substance portion. Hereinafter, a cigarette composed only of the smoking substance part will be referred to as the cigarette of "Experimental Example 1", a cigarette manufactured by combining the cigarette filter produced in Example 1 and the smoking substance part will be referred to as a cigarette of "Experimental Example 2", and Cigarettes manufactured by combining the cigarette filter and the smoking substance part manufactured in Comparative Example 1 were used as cigarettes of "Experimental Example 3". For each cigarette, smoke was smoked and collected by a smoking device (manufacturing company: BORGWALDT, product name: RM2OH) After smoke, its components are analyzed by Gas Chromatography (GC). The component analysis results are shown in Table 1 below. Table 1 cigarette filter Tar (mg/root) Nicotine (mg/stick) Experimental example 1 without 24.4 2.1 Experimental example 2 Example 1 3.2 0.29 Experimental example 3 Comparative example 1 3.7 0.36

According to the above Table 1, it was confirmed that when the cigarette filter of Example 1 is used (Experimental Example 2), even if the inhalation resistance is the same, compared with the case of using the cigarette filter of Comparative Example 1 (Experimental Example 3), tar and Excellent nicotine reduction effect. Depending on the preference of the smoker, cigarettes that contain tar and nicotine below a certain level may be required. When using the cigarette filter of Example 1 which has an excellent tar and nicotine reduction effect, the smoking substance part or rolling paper may be removed even if the smoker's preference is not adjusted. With other configurations, tar and nicotine can be reduced more easily, thereby improving the processability of product production.

As described above, the embodiments have been described using limited examples and drawings, but those with ordinary knowledge in the technical field of the present invention can make various modifications and variations from the above description. For example, the described technology is performed in a sequence different from the described method, and/or the structural elements of the described system, structure, device, circuit, etc. are combined or combined in a different form from the described method, or are other structures. Elements or equivalent technical solutions may be substituted to achieve appropriate results.

10: Smoking Substances Department 100: Smoking products 20: Filter mouth 30a: Smoking Substances Section Wrapping Paper 30b: Filter tip wrapping paper 40:Tipping paper

FIG. 1 is a diagram showing the schematic structure of a smoking article according to a specific example of the present invention.

10: Smoking Substances Department

100: Smoking products

20: Filter mouth

30a: Smoking Substances Section Wrapping Paper

30b: Filter tip wrapping paper

40:Tipping paper

Claims (10)

A cigarette filter including lyocell tow, including: a lyocell tow made from a plurality of lyocell fibers; and a binder that binds the plurality of lyocell fibers to each other, The cigarette filter reduces tar and nicotine transferred from tobacco smoke by 70 to 95 weight percent respectively. The cigarette filter including lyocell tow according to claim 1, wherein, This cigarette filter has an inhalation resistance of 80mmWG to 200mmWG. The cigarette filter including lyocell tow according to claim 1, wherein, The plurality of Lyocell tows are filled into the cigarette filter with a filling density of 0.2g/mL to 0.6g/mL. The cigarette filter including lyocell tow according to claim 1, wherein, The binder is hydroxypropyl methylcellulose, hydroxypropyl cellulose, polyvinyl alcohol, ethylene vinyl acetate, polyvinyl acetate, polyvinylpyrrolidone, polyester or a combination thereof. The cigarette filter including lyocell tow according to claim 1, wherein, Based on 100 parts by weight of the lyocell tow, 0.1 to 5 parts by weight of the adhesive is included. The cigarette filter including lyocell tow according to claim 1, wherein, The cigarette filter also includes a binder solvent, The adhesive solvent is water, monohydric alcohol, polyhydric alcohol or their combination. The cigarette filter including lyocell tow according to claim 6, wherein, The monohydric alcohol is methanol, ethanol, propanol or a combination thereof. The cigarette filter including lyocell tow according to claim 6, wherein, The polyol is a glycol having a C1 to C4 alkylene group. The cigarette filter including lyocell tow according to claim 8, wherein, Based on 100 parts by weight of the lyocell tow, 0.5 to 25 parts by weight of the polyol is included. A method of manufacturing a cigarette filter including Lyocell tow according to claim 1, wherein the manufacturing method includes: Step (1), using the plurality of Lyocell fibers to manufacture the Lyocell tow; Step (2), prepare a binder solution by mixing the binder and a solvent; Step (3), spray the adhesive solution onto the lyocell tow and dry it; and Step (4): Use rolling paper to surround the Lyocell tows formed by combining the Lyocell fibers with the adhesive to manufacture the cigarette filter.

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