KR0167488B1 - Tobacco filter material comprising active carbon fiber - Google Patents

Abstract

The present invention relates to a tobacco filter material comprising a split carbon fiber. Activated carbon fiber is more effective in removing harmful tobacco components than conventional tobacco filter materials (cellulose acetate tow, polypropylene tow or paper). Filter material is made of non-woven fabric or tow by mixing activated carbon fiber with natural and synthetic fiber in certain ratio.

Description

Filter material containing activated carbon fiber

The present invention relates to a tobacco filter material comprising activated carbon fibers, and more particularly, to a tobacco filter material composed of a nonwoven fabric comprising activated carbon fibers and natural or synthetic fibers.

As a filter material for removing harmful components in cigarette smoke, chemical fibers such as acetate fibers are mainly used, and natural fibers such as wood pulp are also used. However, since acetate fiber is more elastic than natural fiber, acetate filter is mainly used in recent years.

In general, cigarette smoke stays in the filter for a very short time, so the filter made of acetate fiber or natural fiber does not have sufficient adsorption efficiency of harmful components. Or triple filter is mainly used. However, since the double or triple filter is manufactured by filling the granular filter between the acetate fiber filters, the manufacturing process is complicated, and when smoking, the granular adsorbent is sucked into the smoker's mouth. Therefore, there is a demand for a tobacco filter material that can be easily manufactured and has an excellent effect of adsorbing harmful substances.

Recently, in order to improve the adsorption rate of harmful substances and to obtain the effect of removing harmful components such as double or triple filters containing activated carbon, research into filter materials by combining carbon fibers with conventional filter fibers such as acetate fibers has been actively conducted. Is going on. Activated carbon fiber has a very high adsorption rate of harmful substances, so it quickly adsorbs harmful substances contained in tobacco smoke during the short period of time when tobacco smoke stays in the filter, thereby increasing the adsorption effect. Specific flavors such as anisole, menthol, It has excellent physical properties such as clove and volatile tobacco fragrance, and has excellent physical properties as tobacco filter material.

Japanese Patent Laid-Open No. 53-101599 discloses a tobacco filter prepared by blending activated carbon fibers with acetate fibers. This tobacco filter is intended to use a filter tow produced by mixing activated carbon fibers having a Y-shaped cross section with a short fiber fineness of 4.0 deniers and a total fineness of 35000 to 90000 deniers in a bundle form with acetate filaments. This tobacco filter is made of a filter tow formed by mixing activated carbon fibers and acetate fibers in a long fiber state. In general, acetate fibers are composed of filaments having crimps, and when mixed with activated carbon fibers, which are long fibers, Since the density of the acetate fiber and the activated carbon fiber appearing on the cross section of the tow is not uniform because it is not uniformly mixed, there is a problem in that it does not uniformly adsorb harmful components when viewed on the filter cross section.

It is an object of the present invention to provide a tobacco filter material which is uniformly blended with activated carbon fibers and natural or synthetic fibers so that noxious components in tobacco components are uniformly removed over the entire cross section of the filter.

The object of the present invention described above is achieved by the tobacco filter material of the present invention, which is formed in a nonwoven state by combining activated carbon fibers made of short fibers with natural or synthetic fibers.

The present invention consists of a tobacco filter material which is made by mixing the activated carbon staple fibers with natural or synthetic fibers uniformly and forming a nonwoven fabric.

Activated carbon staple fibers are produced by a known method of producing activated carbon which carbonizes polyacrylonitrile, rayon, phenol resin, pitch, and the like. Activated carbon fiber can be produced by carbonizing fibers in the form of tow, staple fiber, felt, mat, woven fabric, thread, paper sheet, etc., but in the present invention, a carbon fiber composed of a plurality of reelments is carbonized. It is good to use.

The fineness of the activated carbon fiber described above is preferably in the range of 1-5 denia of single yarn fineness, but may vary depending on the method of manufacturing the nonwoven fabric, the type and length of the natural or synthetic fibers, and the single yarn fineness. In addition, the length of the activated carbon fiber is at least 10 mm, particularly 10-100 mm range, but may vary depending on the single yarn fineness and length of the natural and synthetic fibers to be blended.

The natural or synthetic fibers used in combination with the activated carbon fibers in the present invention include synthetic fibers such as acetate fibers, rayon fibers, polypropylene fibers, polyester fibers and natural fibers such as natural pulp.

The fineness of such fibers is preferably in the range of 1-5 denia of single yarn fineness, but may vary depending on the fineness and length of the activated carbon fibers to be blended. And the length of the fiber is preferably at least 10 mm, especially in the range of 10-100 mm, but may vary depending on the length and fineness of the carbon fiber to be blended.

Tobacco filter material according to the present invention comprises 5-30% by weight of activated carbon fibers and 70-95% by weight of natural or synthetic fibers.

Nonwoven fabric comprising activated carbon staple fibers used in the present invention is a single yarn fineness of 1-5 denier, a single yarn fineness of 1-5 denier, which can use 10-100 mm in length of activated carbon fibers in tobacco filters, 10-100mm in length It can be prepared by a known method of manufacturing a nonwoven fabric which is mixed with natural or synthetic staple fibers of and combined with each other using an adhesive or punched with a needle to form each sheet while bonding the respective fibers. However, short carbon activated carbon fibers can also be produced by the papermaking process. When manufacturing a nonwoven fabric by adhering with an adhesive, an adhesive used in a known nonwoven fabric manufacturing method such as polyvinyl alcohol emulsion and acrylic adhesive is used.

The filter material according to the present invention may be rolled into a cylindrical shape to produce a filter. If necessary, a waveform may be formed on the nonwoven fabric to increase the contact area with the tobacco smoke.

Tobacco filter material according to the present invention is manufactured as follows.

Single yarn fineness 1-5 denier, 5-30% by weight of activated carbon fibers with fiber length of 10-100mm is blended with 70-95% by weight of natural or artificial fibers having the same fineness and length. Manufacture.

In the filter material according to the present invention, since the active carbon fiber and the natural or synthetic fiber are blended in the form of short fibers rather than in the form of the long fibers, the blending ratio is uniform in the cross-sectional area where the blending is uniform. Tobacco filter made of filter material shows a uniform harmful component adsorption effect in the entire cross-sectional area.

Hereinafter, the present invention will be described in detail by way of example.

Example 1

Activated carbon fiber sheet

Activated carbon (ACF) having a single yarn fineness of 2.5, a staple length of 50 mm, and a specific surface area of 1000 m 2 / g is manufactured into a nonwoven fabric having a width of 1 m according to a known nonwoven fabric manufacturing method. In this case, polyvinyl alcohol emulsion was used as the adhesive. The activated carbon fiber nonwoven fabric was formed into a filter by a known filter production method.

Example 2

Activated Carbon Fiber + Acetate + Rayon Blended Nonwoven Fabric

Single yarn fiber fineness 2.0 denier, rayon yarn with 58 mm length, single yarn fiber fineness 2.5 denier, cellulose acetate yarn with 58 mm length, single yarn fiber fineness 2.5 denier, length 50 mm, activated carbon fiber with specific surface area 1000 m2 / g (ACF ) Was blended in the mixing ratio of Table 1 to prepare a nonwoven fabric having a width of 1 m, and then a filter of 24.2 mm in circumference and 96 mm in length was prepared in an acetate filter manufacturing apparatus. Physical properties and smoke adsorption capacity are shown in Table 1 below.

Example 3

Activated Carbon Fiber + Acetate + PET Fiber Blended Nonwoven Fabric

Single yarn fiber fineness 2.0 denier, polyester yarn (PET) with length 58mm, single yarn fiber fineness 2.5 denier, cellulose acetate yarn with length 58mm, single yarn fineness 2.5, length 50mm, activated carbon with specific surface area 1000㎡ / g After blending the fibers to prepare a non-woven fabric having a width of 1m, a filter was prepared as in Example 1 in the acetate filter manufacturing apparatus. The physical properties and the smoke adsorption capacity are shown in Table 2 below.

Example 4

Activated Carbon Fiber + Rayon Fiber + PET Fiber

Rayon yarn with a single yarn fiber fineness of 2.0 denier, 58 mm long, 2.0 denier single yarn fiber fineness, polyester yarn with 58 mm length and single yarn fiber fineness 2.5 denier, 50 mm long, activated carbon fibers with a specific surface area of 1000㎡ / g. After preparing a nonwoven fabric having a width of 1 m, a filter was manufactured using a filter manufacturing apparatus as in Example 1. The physical properties and the smoke adsorption capacity analysis results are shown in Table 3 below.

Claims (2)

In the tobacco filter material comprising activated carbon fibers and natural or synthetic fibers, the filter material comprises 1-5 deniers of single yarn fiber fineness, 5-30% of activated carbon fibers having a fiber length of 10-100 mm and single yarn fiber fineness 1-5 Denier, tobacco filter material comprising activated carbon fibers, characterized in that composed of a non-woven fabric consisting of 70-95% of natural or synthetic fibers having a fiber length of 10-100mm. The tobacco filter material of claim 1, wherein the synthetic fibers are selected from acetate fibers, rayon fibers, polypropylene fibers and polyester fibers and the natural fibers are natural pulp.