WO2006082748A1

WO2006082748A1 - Cigarette filter material and cigarette filter

Info

Publication number: WO2006082748A1
Application number: PCT/JP2006/301251
Authority: WO
Inventors: Hiroki Taniguchi; Takashi Hibi
Original assignee: Daicel Chemical Industries, Ltd.
Priority date: 2005-02-02
Filing date: 2006-01-26
Publication date: 2006-08-10
Also published as: JPWO2006082748A1; EP1856991A1; EP1856991B1; US20080087290A1; JP4937104B2; EP1856991A4

Abstract

It is intended to provide a cigarette filter material which is useful in selectively and efficiently removing formaldehyde while retaining cigarette taste components such as nicotine and tar. A cigarette filter material is obtained by a treatment for attaching a dispersion, which comprises an amino group-containing polysaccharide (chitosan or the like) in the form of grains and a dispersion medium, to a support made of, for example, cellulose acetate fiber. The dispersion medium may be a polar solvent (water, alcohols, etc.), a plasticizer for the support or the like. A cigarette filter made of the cigarette filter material as described above can selectively remove formaldehyde so that the retention ratio of formaldehyde can be lowered to 65% or less while sustaining the retention ratios of nicotine and tar each at 75% or more.

Description

Specification

Tobacco filter material and tobacco filter

Technical field

[0001] The present invention relates to a tobacco filter material useful for selectively removing aldehydes (particularly formaldehyde) efficiently while retaining taste components such as nicotine and tar, and a method for producing the same. The present invention also relates to a cigarette filter made of a tobacco filter material and a cigarette equipped with the cigarette filter.

Background art

[0002] Various components have been proposed as adsorbents for filtering components in tobacco smoke. As such components, many have been reported in which basic components such as amine components are added for the purpose of adsorption of acidic components and adsorption of formaldehyde. For example, JP-A-59-88078 (Patent Document 1), JP-A-59-1519882 (Patent Document 2), and JP-A-60-54669 (Patent Document 3) disclose activated carbon. An adsorbent for cigarette smoke filters in which polyethyleneimine or an aliphatic amine having a low vapor pressure is impregnated is disclosed in JP 2002-528105 (Patent Document 4) and JP 2002-528106 (Patent Document 5). ) Discloses a cigarette filter in which 3-aminoprovirsilyl and related atomic groups are covalently bonded, and JP 2003-505618 (Patent Document 6) discloses a filler containing an ammonium salt. JP-A-57-71388 (patent document 7) discloses that amino acids are added to improve the flavor of tobacco.

[0003] However, especially synthetic polymeric amines having many basic components as described above often exhibit a characteristic amine odor due to decomposition and the remaining low molecular weight components. In addition, the basic component itself or a volatile substance contained therein often volatilizes and is toxic to the human body. The basic component can be reduced in volatilization by setting the liquidity at the time of attachment to the acidic side. However, for some reason, such as contact with other basic substances or hydrolysis, it is free of play. There is a risk of separation. Amino acids and the like crystallize in many cases and have low volatility. However, in such a crystalline state, a sufficient effect of lowering the activity for adsorption cannot be expected. In this way, with adsorbents using ordinary basic components, removal of acidic substances, aldehydes, etc. However, it was not practical as an adsorbent for cigarette filters.

[0004] On the other hand, among such basic substances, chitosan derivatives such as chitin and chitosan do not cause volatilization when crystallized, and are also safe for the human body and have antibacterial properties. It has been known. For example, Japanese Patent Laid-Open No. 11-100713 (Patent Document 8) discloses chitosan-containing cellulose acetate fiber containing chitosan and having a sterilization rate of 26% or more. In this document, a method of adding or mixing a dispersion obtained by pulverizing and dispersing chitosan to a cellulose acetate solvent to a predetermined size or less (maximum particle size of 3 μm or less), directly adding or mixing chitosan, It is described that chitosan is dispersed and contained in a spinning dope by a method of adjusting the size of chitosan according to predetermined dispersion conditions.

[0005] In addition, tobacco filters using such chitin and chitosan derivatives have been proposed. For example, JP-A-53-142600 (Patent Document 9) discloses a tobacco filter containing 3% by weight or more of chitin or a chitin derivative with respect to a tobacco filter material. In this document, chitin is poly-N-acetyl D-darcosamine, and as a method for containing this chitin, powder obtained from chitin may be directly blended into a tobacco filter material or after dissolving chitin in a polar solvent. It is described that fibers or films obtained by extrusion into a coagulating liquid such as isopropyl ether to form fibers or films may be combined. For example, in Example 1 of this document, after the cellulose acetate fiber bundle is sufficiently opened with air and 6% by weight of triacetin is sprayed uniformly, the fiber surface is adhered while the filament surface is sticky. It is described that 3 to 70% by weight of chitin powder is blended in the bundle. In this document, chitin and chitin derivatives possess a acetyl group in their structure. Therefore, especially when blended in an acetate filter, it has a unique light flavor due to a synergistic effect with the acetyl group of acetate. In particular, in the examples, the tar removal rate is 34-41% and the nicotine removal rate is 28-29%, which is equivalent to or higher than that of the conventional product. It has been described.

[0006] JP-A-60-168373 (Patent Document 10) describes chitin or a derivative thereof (chitosan obtained by deacetylating a part or all of the acetylylamino group of chitin, its 0H group or CH Tobacco filters are disclosed which are made from fibers composed of OH groups etherified, esterified, hydroxyethylated, or methylated). In this document, as a method for producing the fiber, it is described that a method in which chitin or a derivative thereof is melted in a solvent to form a dope, and this dope is subjected to wet spinning to form a fiber is preferably used. . The cigarette filter in this document adsorbs tar and nicotine during use compared to a filter made of triacetyl cellulose or rayon, and immediately adsorbs 1.5 to 2 times more than the conventional one. have.

[0007] JP-A-62-111679 (Patent Document 11) discloses polysaccharide ion exchangers and powdered polysaccharides (cellulose, agarose) in order to remove mutagens in smoke during smoking. , Amylose, chitin, chitosan, etc.). This document describes that polysaccharide ion exchangers and powdered polysaccharides can be used as filters for cigarette bodies and in a form that is dispersed or sandwiched in the space of acetate filters.

Japanese Patent Laid-Open No. 7-31452 (Patent Document 12) discloses a tobacco filter having 5 to 100% by weight of chitin or chitosan. This document states that chitin 'chitosan may be used alone or mixed with silica, alumina, aluminosilicate, zirconia, rayon, cellulose, protein, synthetic resin powder or fiber. It has been. This document also describes chitin 'chitosan solutions, for example, silica, alumina, amino silicate, zirconia, activated carbon, cellulose such as rayon, cotton, wood pulp, proteins such as starch, gelatin, casein, or It may be used after impregnating a substrate made of powder or fiber of synthetic resin such as cellulose acetate, polyethylene, polyester, nylon, etc. and then dried. The filter described in this document can effectively adsorb and collect harmful components such as nicotine tar and aldehydes in cigarette smoke. As a specific method of using the chitin 'chitosan powder, in Example 3, 80 mg of powdered chitin' chitosan was filled into a paper tube, and both sides of the paper tube were covered with 10 mg of cotton nonwoven fabric. A filter chip is formed, and a filter chip is formed by connecting the cigarette part of the commercial highlight to this. A filter with a nicotine collection rate of 70%, a tar collection rate of 75%, and an acrolein collection rate of 96% Stated that you got Yes.

[0009] In addition, nicotine and tar power are considered to be the main harmful components in cigarette smoke, and interest in delivery of nicotine and tar has been imposed, and many countries have been obligated to label nicotine and tar. . However, nicotine itself is a favorite component of tobacco and is thought to be directly involved in smoking satisfaction. Also, with regard to tar, it is not preferable to remove the tar component in the tobacco smoke component at a relatively high level in order to impair the flavor. That is, if smoke components with low volatility including tar and nicotine are removed indiscriminately, the taste becomes light and satisfaction cannot be obtained. On the other hand, aldehydes, especially formaldehyde, are not preferable for health as they are recently attracting attention as one of the allergic causative agents that only have an irritating smell, and it is preferable to remove them as much as possible. Yes.

[0010] Accordingly, it is required to selectively remove only the aldehyde component (especially formaldehyde) in the smoke component while keeping the amount of tar and nicotine in the tobacco smoke component at a relatively high level.

[0011] However, cigarette filters using chitin and chitosan derivatives as described above are relatively safe for humans, but there are many substances such as nicotine and tar that can be obtained only with aldehydes such as formaldehyde. Since it is removed, the taste (or savory taste) is impaired.

[0012] Specifically, when particles and fibers such as chitin and chitosan derivatives are used as they are in a cigarette filter, selective adsorptivity to formaldehyde cannot be obtained. And a lot of nicotine will be adsorbed. As a result, tar and nicotine are reduced, making the smoker unsatisfactory, and the smoker's intention is to breathe deeply into and smoke, and to smoke and swallow smoke during smoking. A lot.

[0013] Furthermore, chitosan and the like are themselves hard and brittle. In a finolator made of chitosan fibers, chitosan fibers that have fallen from the filter are sucked into the human body and damage the respiratory organs (eg, bronchial flagella). There is a possibility. Further, as described in Patent Document 12, even when chitosan particles are added to a cellulose acetate filter that is commonly used as a smoke filter for cigarettes, the particles fall off and are the same as described above. Respiratory (example For example, there is a possibility of damaging bronchial flagella).

[0014] Therefore, there has been a demand for a tobacco smoke filter that maintains the selective adsorptivity of formaldehyde and has a small amount of tar and nicotine adsorbed.

Patent Document 1: Japanese Patent Application Laid-Open No. 59-88078 (Claims)

Patent Document 2: Japanese Patent Application Laid-Open No. 59-1519882 (Claims)

Patent Document 3: JP-A-60-54669 (Claims)

Patent Document 4: Japanese Translation of Special Publication 2002-528105 (Claims)

Patent Document 5: Special Table 2002-528106 (Claims)

Patent Document 6: Special Table 2003-505618 (Claims)

Patent Document 7: Japanese Unexamined Patent Publication No. 57-71388 (Claims)

Patent Document 8: JP-A-11-100713 (Claims, paragraph number [0012]) Patent Document 9: JP-A-53-142600 (Claims, page 2, upper left column, line 1 to right) Upper column, 2 lines, Example)

Patent Document 10: JP-A-60-168373 (Claims, page 1, right column, line 16 to page 2, right column, line 15)

Patent Document 11: Japanese Patent Application Laid-Open No. 62-111679 (Claims, page 2, upper left column, lines 1 to 17)

Patent Document 12: Japanese Patent Application Laid-Open No. 7-31452 (claims, paragraph numbers [0004] [0006], Examples)

Disclosure of the invention

Problems to be solved by the invention

Accordingly, the object of the present invention is to efficiently remove (or reduce) aldehydes (particularly formaldehyde) while maintaining a high level of taste (or flavor) components such as tar and nicotine.

) To provide a cigarette filter material that can be produced.

[0016] Another object of the present invention is to provide a material for a tobacco filter that is odorless and safe even when ingested and is useful for selectively removing aldehydes (particularly formaldehyde). .

[0017] Still another object of the present invention is to selectively remove aldehydes (particularly formaldehyde). The object is to provide a method for producing a tobacco filter material that can be removed easily and efficiently.

[0018] Another object of the present invention is to provide a cigarette filter capable of selectively removing aldehydes (particularly formaldehyde) that do not impair the taste, and a cigarette provided with the cigarette filter.

Means for solving the problem

[0019] As a result of intensive studies to achieve the above-mentioned problems, the present inventors have determined that a carrier (such as a tow structure (filter rod structure)) is used as a polysaccharide having a granular amino group (such as chitosan) and a carrier. A cigarette filter material deposited with a dispersion composed of a dispersion medium (for example, water, a solvent having a hydroxyl group such as alcohol, a plasticizer for a carrier such as triacetin) has the amino group. The chemical adsorption performance that is thought to be due to the amino group of the polysaccharide is exerted, and it has been found that aldehydes (especially formaldehyde) can be selectively adsorbed to taste components such as tar and nicotine. The invention was completed.

That is, the tobacco filter material of the present invention (cigarette smoke filter material) is a tobacco filter material in which a polysaccharide having an amino group is attached to a carrier, and the carrier has a particulate amino group. Adhesion treatment is performed with a dispersion liquid composed of a polysaccharide (polysaccharide particles having an amino group) and a dispersion medium (specifically, a dispersion medium for the polysaccharide). The carrier may be a carrier having a tow structure (filter rod structure) (or a tow structure carrier, for example, a tow structure filter) (or the filter material may have a tow structure). More specifically, the filter material may be composed of a filament and have a tow structure), and the polysaccharide having an amino group may be chitosan. The toe structure is a structure (filter structure) formed by aligning monofilament fiber forces with a predetermined bundle (for example, a bundle of about 3000 to 100,000) in the main smoke flow direction. In the dispersion, the average particle diameter of the granular amino group-containing polysaccharide may be about 0.1 to: lOO / im (for example, 0.5 to 50 μΐη). In the liquid, the dispersion medium is at least selected from a polar solvent (particularly a solvent having a hydroxyl group) and a plasticizer for the carrier (for example, simply a plasticizer, such as triacetin). May be one kind. The solvent having a hydroxyl group may be a solvent having at least one hydroxy group selected from water and alcohols. The plasticizer may be a polyol (eg, glycerol, polyglycerol, etc.). It may be a lower fatty acid (for example, C-alkanecarboxylic acid such as acetic acid) ester. The dispersion medium adheres

14

For example, the dispersion medium may contain a polyol as a moisturizing component [for example, C alkanediole, which may remain or adhere to the carrier even after treatment.

2-6

, Di to tetra C alkylene glycol, and C alkanetriol (glycerin

2-4 3-10

Etc.) may be included.

[0021] Representative dispersions include, for example, chitosan having an average degree of deacetylation of 70% or more and an average particle size of 1 to 20 zm, and C alkanetriol (particularly glycerin).

3 -6

Also included are dispersions and the like. Such a dispersion may contain water, alkanols, plasticizers, and the like.

[0022] In the tobacco filter material of the present invention, at least the polysaccharide having an amino group is attached to or contained in the carrier. In such a cigarette filter material of the present invention, the amount of the polysaccharide having an amino group may be, for example, about 1 to 100 parts by weight with respect to 100 parts by weight of the carrier.

[0023] Further, in the tobacco filter material of the present invention, the dispersion medium may remain on the carrier. The remaining dispersion medium may be a part or all of the dispersion medium in the dispersion. There may be. When the carrier (or tobacco filter material) contains or remains a dispersion medium, the selective removal of aldehydes (particularly formaldehyde) can be further improved. The content of such a dispersion medium may be, for example, about 0.5 to about 100 parts by weight with respect to 100 parts by weight of the carrier. Moreover, the adhesion amount of polysaccharides having amino groups is about 1 to 80 parts by weight with respect to 100 parts by weight of the carrier, and the residual amount of the dispersion medium is 5 to 400 parts by weight with respect to 100 parts by weight of polysaccharides having amino groups. It may be about a part. In particular, when the moisturizing component is used as a dispersion medium, the dispersion medium can be left, contained, or attached to the carrier efficiently even after the adhesion treatment. For example, in the tobacco filter material, The dispersion medium is composed of at least a polyol as a moisturizing component, and the residual amount of the polyol is about 3 to 200 parts by weight with respect to 100 parts by weight of the polysaccharide having an amino group. It may be.

[0024] The tobacco filter material of the present invention, as described above, is a dispersion in which the carrier is composed of a polysaccharide having a powdery amino group and a dispersion medium (dispersion medium for dispersing the polysaccharide). It can manufacture by carrying out adhesion processing with.

[0025] Further, the present invention includes a tobacco filter made of the tobacco filter material. Since such a cigarette filter can efficiently remove (or reduce) aldehydes (particularly formaldehyde), the present invention further comprises a cigarette filter made of the cigarette filter material. Also included is a method of reducing aldehydes (especially formaldehyde) in tobacco smoke passing through (or passing through) (specifically, tobacco smoke passing through (or passing through) the tobacco filter, mainstream smoke). In such a method, taste components such as nicotine and tar can be maintained at a high level.For example, while maintaining nicotine and tar at a retention rate of 75% or more, the formaldehyde retention rate can be reduced to 65% or less. .

[0026] The present invention also includes a cigarette provided with the cigarette filter.

In the present specification, “chitosan” means chitin [1, 4 poly N-acetyl

D darcosamine, (C H NO)] is obtained by heating with concentrated alkaline solution.

8 13 5 n

It is a compound having at least a polymer structure of β-1,4 poly D darcosamine.

The invention's effect

[0028] In the present invention, a powdery amino group-containing polysaccharide and a dispersion medium are combined and a carrier (such as a carrier having a tow structure of cellulose ester fiber) is attached and treated in the form of a dispersion. Aldehydrides (especially formaldehyde) can be efficiently removed while maintaining a high level of taste (or flavor) components such as nicotine. In addition, since the material for cigarette filter according to the present invention uses a polysaccharide having an amino group such as chitosan, it is odorless and safe even when taken orally, and selectively removes aldehydes (especially formaldehyde). Useful for Therefore, the cigarette filter constituted by the cigarette filter of the present invention can selectively remove aldehydes (particularly formaldehyde) that do not impair the taste. Detailed Description of the Invention

[0029] The material for a tobacco filter of the present invention (hereinafter simply referred to as filter material, material, etc.) has a polysaccharide and a dispersion medium in which the carrier has a granular amino group (specifically, the polysaccharide) A material for a cigarette filter that has been subjected to an adhesion treatment with a dispersion liquid composed of a dispersion medium comprising: a polysaccharide having at least an amino group (and a dispersion medium) attached to the carrier.

[0030] That is, polysaccharides having an amino group (such as chitosan) usually have a basic or sought-after property because amino groups that are largely involved in the removal of aldehydes (particularly formaldehyde) form hydrogen bonds. Adsorption performance of aldehydes (especially formaldehyde) cannot be fully demonstrated even if used as a cigarette filter material or a cigarette filter as it is, which is weakly nuclear.

Accordingly, in the present invention, the removal performance (selective removal property) of aldehydes of the polysaccharide is improved by combining the polysaccharide having a powdery amino group with the dispersion medium. The reason why the selective removal (or reduction) of such aldehydes is improved is not clear, but in the tobacco filter material of the present invention, the carrier is used by using a dispersion containing such a polysaccharide and a dispersion medium. By performing the adhesion treatment, for example, (a) polysaccharides having amino groups can be efficiently adhered to the carrier while maintaining the granular form, (b) dispersion medium (and dispersion remaining on the carrier after the adhesion treatment) By virtue of the action of the medium, the hydrogen bonds of the amino groups of the polysaccharide can be suppressed or relaxed, and the amino groups can be effectively acted on the selective removal of aldehydes. The surface area of the polysaccharide can be increased, (d) the adhesive force of the polysaccharide having an amino group attached to the carrier can be increased, (e) these (a) to (d) act complementarily or synergistically, etc. The effect of the amino group Selective removal with respect to polysaccharide aldehydes having is considered to be effectively exhibited.

[0032] [Carrier]

The carrier only needs to be treated with a dispersion containing a polysaccharide having an amino group and a dispersion medium. Depending on the shape (or structure) of the carrier, for example, natural or synthetic fiber {for example, cellulose ester fiber (cellulose acetate fiber, etc.) , Cellulose fibers [wood fibers (such as wood pulp fibers such as conifers and hardwoods), seed hair fibers (for example, cotton such as linters), Jin skin fiber, leaf fiber (eg Manila hemp, New Zealand hemp)], regenerated cell mouth fiber (viscose rayon, copper ammonia rayon, nitrate silk, etc.), polyester fiber, polyurethane fiber, polyamide fiber, polyolefin fiber (Polyethylene fibers, polypropylene fibers, etc.)}, etc. (or fibrous materials), granular materials (for example, activated charcoal, diatomaceous earth, silica gel, alumina, titanium oxide, dinoleconia, zeolite, etc. inorganic particles, wood chips, Other natural or synthetic polymer particles), proteins (gelatin, casein, etc.). These carrier components may be used alone or in combination of two or more.

[0033] Among these, examples of preferable constituent components of the carrier include fibers (fibrous substances) such as cellulose ester fibers. In cellulose ester fiber, cellulose esterolate can be classified into f, cenorelose acetate, cenorelose propionate, cenoellose butyrate, mixed fatty acid ester (cellulose acetate propionate, cell mouth acetate acetate butyrate, cellulose acetate phthalate). Organic acid esters such as cellulose nitrate, cellulose sulfate, cellulose phosphate, etc .; mixed acid esters such as cellulose nitrate, cellulose acetate; and cellulose ester derivatives such as poly-prolacton grafted cellulose acetate . These cellulose esters may be used alone or in admixture of two or more. Among these, preferable cellulose esters include organic acid esters (for example, ester with an organic acid having about 2 to 4 carbon atoms), and, for example, cenololose acetate, cenololose propionate, cenololose butyrate. Power, including cellulose acetate propionate, cellulose acetate butyrate, etc. Especially cellulose acetate (especially cellulose diacetate) is preferred.

[0034] The polymerization degree (viscosity average polymerization degree) of the cellulose ester is usually 10 to 1000 (for example, 50 to 1000), preferably <is 50 to 900 (for example, 100 to 800), and more preferably <is 200 to 800. It may be a degree.

[0035] The degree of substitution (average degree of substitution) of the cellulose ester (particularly cellulose acetate) can be selected, for example, from the range of:! To 3 (eg, 1 to 2.9), preferably 1.5 to 2.7, more preferably about 1.7 to 2.6.

[0036] The fiber constituting the carrier (eg, cellulose ester fiber) has an average fiber length of 0.1 mm to 5 cm, for example, 0.5 to 30 mm (for example, 1 to 25 mm), preferably 2 to 20 mm, more preferably 3 to 15 mm (for example, 5 to 10 mm). It may be a degree. The average fiber diameter of the fibers may be, for example, about 0.01 to 100 / im, preferably about 0.5 to 80 xm, and more preferably about 1 to 50 xm.

[0037] The fibers such as cellulose ester fibers (for example, filaments or fibers constituting the filter tow) may be crimped fibers or non-crimped fibers.

[0038] In the granular material (or granular material), the average particle size is, for example, about 0.:! To 200 200 μ πι, preferably 10 to 1500 zm, and more preferably about 100 to 1000 μm. It may be.

[0039] The shape (or structure) of the carrier can be appropriately selected according to its constituent components (fibers, particles, etc.), and may be the shape of the constituent components themselves such as fibrous or powdery (or granular). Brown, woven, non-woven, tow structure (or tow or filter rod structure, for example, crimped fiber tow structure), paper (or paper or paper structure), sheet, granulated product Any shape such as In addition, the paper-making structure carrier is cut into the above-mentioned staples after cutting the fibers into a sheet form by the dry and wet nonwoven fabric manufacturing methods, or the paper is made after mixing the above-mentioned staple and beating pulp. Can be obtained.

[0040] The carrier may be a preformed filter (for example, a filter having a cellulose ester crimped fiber tow structure such as cellulose acetate). When such a preformed filter (or filter-shaped) carrier is used, it can be used as a cigarette filter as it is after the adhesion treatment (and drying).

[0041] Preferred carriers include a tow-like (or tow structure or filter rod structure) carrier formed of fibers [or a tow-structured filter formed of fibers (filter carrier)]. In other words, airborne particulates such as nicotine and tar are abundant in tobacco smoke, especially mainstream smoke. Such suspended fine particles are likely to be trapped in the fibril portion when fibers having a fibril structure are contained in the carrier. Therefore, in the carrier having a fibril structure, the transmittance of nicotine and tar decreases, and there is a possibility that the carrier does not meet the object of the present invention. However, in the case of a tow structure (tow structure filter) described later, a monofilament defined by polymer engineering in a broad sense (a multifilament with a virtually infinite continuous length). It has a thiofilament structure and has few fibrils, so it does not trap airborne particles and excels in nicotine and tar permeability.

[0042] Therefore, from this point of view, a sheet structure composed of natural fibers such as cotton linters and absorbent cotton (Example 3 of JP-A-7-31452) and natural fibers having a fibril structure such as beating pulp. A carrier (or rod) composed of fiber bundles having a tow structure (tow structure filter-like) formed from monofilaments is preferable to this carrier (or rod).

[0043] (Tow structure carrier or tow structure filter carrier)

As described above, in the present invention, the most preferable carrier is a tow structure carrier (particularly, a tow structure filter carrier). A tow structure (tow structure filter) has an infinitely long filament force and can be formed by spinning (dry, melting or wet spinning) a conventional filter material (fiber). Examples of the fibers constituting the carrier of the tow structure (that is, the monofilament bundling structure) include the above-described fibers such as cellulose fibers, regenerated cellulose fibers (such as viscose rayon fiber and copper ammonia rayon fiber), and cellulose derivative fibers (cellulose). Ester fibers, etc.), polyester fibers, polyurethane fibers, polyamide fibers, and synthetic fibers such as polyolefin fibers (polyethylene fibers, polypropylene fibers, etc.). These fibers can be used alone or in combination of two or more.

[0044] Preferred fibers include cellulose fibers, cellulose ester fibers, and the like, and in particular, fibers composed of at least cellulose ester fibers are preferred. Cellulose ester fibers include the same fibers as described above, for example, cellulose acetate fibers, cellulose propionate fibers, cellulose butyrate fibers, and other organic acid ester (for example, organic acid esters having about 2 to 4 carbon atoms) fibers; cellulose acetate Examples thereof include mixed fatty acid ester fibers such as propionate fibers and cellulose acetate butyrate fibers; and cellulose ester derivatives such as polycapacitor rataton grafted cellulose ester fibers. Preferred cellulose ester fibers include, for example, cellulose acetate fiber, cenorelose propionate fiber, cenorelose butyrate fiber, cellulose acetate propionate fiber, cellulose acetate butyrate fiber, and cellulose acetate fiber in particular. I like it. These cellulose ester fibers can also be used alone or Two or more types can be used in combination.

[0045] In the tow structure (tow structure carrier), the degree of polymerization (average degree of polymerization, viscosity average degree of polymerization) of the cellulose ester may be, for example, in the range of about 50 to 900, preferably about 200 to 800. ,. The degree of substitution (average degree of substitution) of the cellulose ester can be selected from a range of about 1.5 to 3.0, for example.

[0046] The cross-sectional shape of the filament (or fiber) is not particularly limited, and is, for example, circular, elliptical, irregular (eg, Y-shaped, X-shaped, I-shaped, R-shaped, H-shaped, etc. ) Or hollow shape, but a polygonal irregular fiber cross section such as Y-shape, X-shape, I-shape, R-shape, H-shape is preferred. The average fiber diameter and the average fiber length can be selected according to the type of fiber. For example, the average fiber diameter may be about 0.01 to: ί00 μπι, preferably about 0.050 μΐη, and the average fiber length A range force of 50 μm to 5 cm, preferably about 100 μm to 3 cm is often selected. In particular, in the case of a filter-like carrier, it is preferable to have an average fiber length of a length (about 3 to 30 mm, for example, 10 mm, 25 mm, etc.) corresponding to the length of the filter or a part constituting the filter. Masle.

[0047] The fineness of the fibers (cellulose ester fibers and the like) can be selected from a range of, for example, about 1 to 16 denier, preferably about 1 to 10 denier. The fibers such as cellulose ester fibers may be either non-crimped fibers or crimped fibers, but monofilaments (crimped fibers) having a crimped structure are more preferred.

[0048] The tow structure carrier (filter carrier) has, for example, 3,000 to 1,000,000 (eg, 3,000 to: 100,000), preferably 5,000. It is a form of tow (fiber bundle) formed by bundling (bundling) single fibers (filaments) of ~ 100,000 fibers (particularly cellulose ester fibers).

[0049] In the case of a carrier having a tow structure (or filter), a filament treated with a polysaccharide containing amino groups (for example, chitosan) and an untreated filament are mixed and focused to form a carrier (or filter). Can also be formed. The use of cellulose ester (preferably cellulose acetate) as the material for such untreated filaments is advantageous in terms of taste, and it is possible to adjust the reduction rate of formaldehyde and the residual rate of tar and nicotine. The [0050] [Dispersion]

(Polysaccharides having amino groups)

The polysaccharide having an amino group is a gnolecan derivative and is not particularly limited as long as it has an amino group as a substituent. A typical example is chitosan.

[0051] As described above, chitosan has an average degree of deacetylation of 20% or more (for example, about 30 to 100%) as long as the acetyl group of chitin is at least deacetylated as described above. Preferably, it may be 40% or more (for example, about 50 to 99%), more preferably 60% or more (for example, about 65 to 98 /.).

[0052] Chitosan used in the present invention usually has a relatively high degree of deacetylation (ie, has many amino groups) in order to increase the selective removal rate of aldehydes (particularly formaldehyde). Often). That is, chitosan having a high degree of deacetylation has more amino groups than chitin and is excellent in the selective removal effect of aldehydes (particularly formaldehyde).

[0053] Therefore, the degree of deacetylation (average degree of deacetylation) of chitosan is, for example, 60% or more (eg, about 65 to: 100%), preferably 70% or more (eg, about 75 to 99%). ), More preferably 80% or more (for example, about 85 to 98%). The “degree of deacetylation” in chitosan is represented by the following formula when the acetylyl group of chitosan is A1 mol and the deacetylation group (ie, amino group) of chitosan is A2 mol. Such a degree of deacetylation can be analyzed by, for example, 'H-NMR, ¹³ C-NMR and the like.

[0054] A2 / (A1 + A2) X 100 (%)

The base dissociation constant pK of chitosan is, for example, 5.5 or more at 25 ° C (for example,

b

6 to: about 12), preferably 6 or more (for example, about 6.3 to about 10), more preferably 6.5 or more (for example, about 6.8 to 9). In order to obtain a removal rate (particularly formaldehyde), usually 7 or more (for example, about 7.3 to about 11), preferably 7.5 or more (for example, about 7.8 to about 10), more preferably May be 8 or more (for example, about 8.5 to 9.5).

[0055] The chitosan may be a derivatized chitosan derivative. Such a key Examples of tosan derivatives include chitosan salts (for example, pyrrolidone carboxylates, lactates, carboxylates such as alginates), hydroxylated chitosans [hydroxyalkyl groups such as hydroxypropyl chitosan (hydroxyethyl group, hydroxypropyl). And the like) and cationized chitosan. In addition, chitosan derivatives include 〇H groups and CH

2

OH group is a protecting group (or substituent), for example, an alkyl group (C alkyl such as methyl group)

1-4 groups, etc.), ester groups (or acyl groups such as acetyl groups, etc.) protected or substituted with chitosan and the like.

[0056] The degree of polymerization of polysaccharides having amino groups (particularly chitosan) (average polymerization degree, viscosity average polymerization degree) can be selected from a range of about 10 to 5000 (for example, 50 to 4000). The arrangement may be 20 to 3000, preferably 300 to 2000, more preferably 50 to 1000 (for example, 100 to 500).

[0057] The amino group-containing polysaccharide is dispersed in the form of powder (or powder) in the dispersion. The polysaccharide having an amino group may be spherical, ellipsoidal, columnar (such as prismatic), or indefinite, as long as it is powdery (particulate, particulate, pellet, etc.).

[0058] The average particle size of the polysaccharide having a powdery amino group can be selected in the range of 0.05 to 500 μm (for example, 0.08 to 300 / im). ~: LOO / im, preferably 0.5-50 / im, more preferably about l-20 / im. In the dispersion, the granular amino group-containing polysaccharide may be primary particles or secondary particles depending on the type of the dispersion medium. By adjusting the particle size of the polysaccharide in the dispersion, selective removal of aldehydes (particularly formaldehyde) can be enhanced.

[0059] The content (dispersion amount) of the polysaccharide having an amino group in the dispersion liquid depends on the type of the dispersion medium. The dispersion medium (total amount of dispersion medium) is 100 parts by weight. 0.01 to 200 parts by weight, for example, 0.05 to 150 parts by weight (for example, 0.1 to 100 parts by weight), preferably 0.2 to 100 parts by weight (for example, 0.5 to 90 parts by weight), more preferably about 1 to 80 parts by weight (for example::! To 70 parts by weight).

[0060] (Dispersion medium)

The dispersion medium is a solvent that can disperse the granular amino group-containing polysaccharide (or the above-mentioned polysaccharide). The dispersion medium is not particularly limited as long as it is a poor solvent for saccharides, and such a dispersion medium can be selected according to the type of polysaccharide having an amino group (degree of polymerization, degree of deacetylation, etc.). It may be a solvent (non-polar solvent) or a dispersion medium (solvent) capable of dissolving (or plasticizing) the carrier. In addition, the dispersion medium includes a solid moisturizing component as will be described later. The dispersion medium may be used alone or in combination of two or more.

[0061] Examples of the solvent include nonpolar or nonpolar solvents [for example, hydrocarbons (aliphatic or alicyclic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, etc.), chain carboxylic acid esters May be a solvent having a relatively low dielectric constant or non-dielectric constant (for example, a dielectric constant of less than 15), such as ethyl acetate and acetate esters such as butyl acetate. It may be composed of a polar solvent (or polar liquid). The polar solvent usually does not dissolve the carrier in many cases.

[0062] Examples of the polar solvent include water, alcohols, ketones (dialkyl ketones such as acetone, methyl ethyl ketone, and methyl isoptyl ketone), ethers [cyclic ethers (tetrahydrofuran), dialkylene glycol, etc.] Alkyl ethers (such as ethylene glycol dimethyl ether) and glycol ether esters (such as ethylene glycol monomethyl ether acetate and propylene glycol monomethyl ether acetate)].

[0063] Preferable polar solvents include solvents having hydroxyl groups such as water and alcohols from the viewpoint that the hydrogen bonds of the amino groups of the polysaccharide can be relaxed efficiently. As the alcohols, for example, monools [alcoholic alcohols such as methanol, ethanol, 1 propanol, isopropanol, n-butanol, 2-butanol, isobutanol, etc., preferably More preferably C alkano

1-10 1-8 1-6, especially C alkanol, etc., cycloalkanol (Cyclohexanol, etc.)

14

Cycloalkanol), alkylene glycol monoalkyl ether (methyl

4 10

Losonoleb, Etinorecero Sonoreb, Butinorecero Sonoreb, Propylene Glycolanol Monomethinoate, etc., Dialkylene Glycol Monoalkyl Ether (Methyl Carbitol, Ethyl Carbitol, etc.), (Poly) alkylene glycol Monoashi Rate (ethylene glycol monoacetate etc.)], polyols {diols [eg alkanediol (e Tylene glycol, propylene glycol, trimethylenedaricol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, C alkanediols such as hexylene glycol, preferably C alkanediol, more preferably C Al

2- 10 2-8 2-6 Candiol, especially C alkanediol, etc., polyalkylene glycol (jet

2-4

Di- or tetra-C alkylene glycols such as lenglycol, dipropylene glycol, triethylene glycol, tripropylene glycol, etc.), triols

2-4

Trino monole (glycol, 1, 2, 6-hexanetriol and other C canole trio

3- 10

, Preferably C alkanetriol, more preferably C alkanetriol)]

3-6 3-4

, Tetrafunctional or higher polyols [multimers of trifunctional or higher polyols (such as alkanetriol) (for example, polyglycerin such as diglycerin, triglycerin, etc.), etc.].

[0064] The polar solvents may be used alone or in combination of two or more.

[0065] In particular, the polar solvent may be composed of at least a polar solvent as a moisturizing component (a polar solvent acting as a moisturizing component; hereinafter, sometimes referred to as a moisturizing polar solvent). Examples of such polar solvents include dialkylene glycol monoalkyl ethers, (poly) alkylene glycol monoacylates, and polyols among the polar solvents exemplified above (for example, alkanediols, alkanetriols (glycerin, etc.)). Etc.]. Particularly preferred moisturizing polar solvents have a plurality of hydroxyl groups, and include polyols in that they have excellent ability to relax hydrogen bonds of the amino groups of the polysaccharide. .

That is, since the polyols and the like have a relatively high boiling point, they remain or adhere to the drip or even the tobacco filter material after the adhesion treatment (and drying) and act as a moisturizing component (or moisturizing agent). To do. Specifically, such a moisturizing polar solvent (polyol or the like) as a moisturizing component does not evaporate from the carrier after the adhesion treatment and remains in the tobacco filter material (or carrier), and the above-mentioned many It has an excellent ability to relax hydrogen bonds of saccharide amino groups, and is useful for improving the selective removal of aldehydes. However, since such moisturizing components remain in the tobacco filter material or carrier, the selective removal of aldehydes can be stably maintained over a long period of time. In addition, moisturizing polar solvent as a moisturizing component suppresses volatilization of water and monools (such as Al-Nol) after adhesion treatment. Such a polar solvent is allowed to remain on the carrier, so that the hydrogen bond of the amino group of the polysaccharide can be effectively relaxed.

[0067] The moisturizing polar solvent as the moisturizing component may be used alone or in combination of two or more. Also, a volatile dispersion medium [particularly selected from volatile polar solvents or non-moisturizing polar solvents such as water and monools (for example, alkenols such as C alunol).

14

Or at least one solvent, etc.] and a moisturizing polar solvent.

[0068] The boiling point of the moisturizing polar solvent (especially polyols) is, for example, 150 ° C or higher (for example, about 180 to 500 ° C), preferably 200 ° C or higher (for example, about 210 to 400 ° C). More preferred is <220 ° C or higher (eg 230-350.C), especially 250. It may be C or more (for example, 260 to 320, about C).

[0069] The boiling point of the volatile dispersion medium (water, a volatile polar solvent such as the above-mentioned aranol) is, for example, less than 150 ° C (eg, 35 to: 145 ° C), preferably 40 to: It may be about 130 ° C, more preferably 50 to about 120 ° C.

[0070] The dispersion medium capable of plasticizing the carrier includes a conventional plasticizer for the carrier. Such a dispersion medium capable of plasticizing the carrier can efficiently increase the adhesion to the carrier by plasticizing the carrier. Examples of the plasticizer include phosphate ester {aliphatic phosphate ester (for example, tri-C alkyl phosphate such as triethyl phosphate).

1-12 ester, aromatic phosphate ester (octyl diphenyl phosphate c)

Trialkyl phosphates such as 1-2 alkyl monodialkyl esters, tricresyl phosphate, etc.

0 6-15 6-15 ester, etc.), condensed phosphate ester [eg dihydroxyarene bis (diaryl phosphate) such as resorcinol bis (diphenyl phosphate)], etc.}, carbonate esters {eg aromatic Carboxylic acid esters [For example, aromatic dicarboxylic acid esters such as dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dihexyl phthalate, dioctyl phthalate, etc.

1 12

Phthalic acid such as Kichetil, etc.

1 -6 1-12

Aromatic polycarboxylic acid esters such as stealth], aliphatic carboxylic acid esters [for example, aliphatic dicarboxylic acid esters (for example, dibutyl adipate, dioctyl adipate, dibutoxyshetchetyl adipate, etc.) Esters, these Azelaic acid ester corresponding to adipic acid ester c

6 Dicarboxylic acid C alkyl ester), Cenic acid ester (taenoic acid acetyl chloride)

-12 1-12

Butyl), unsaturated fatty acid esters (such as butyl oleate, C-alkene carboxylic acid mono-C alkyl esters such as ricinoleic acid methylacetylene), polyols or

8- 30 1-12

Polyhydric alcohols (such as the above-mentioned polyols such as fatty acid esters of glycerin, trimethylolpropane, pentaerythritol, sorbitol, etc.), ester oligomers (force prolataton oligomers, etc.), etc. Can be mentioned.

[0071] Examples of the fatty acid ester of the polyol include lower fatty acid (for example, C alkanecarboxylic acid such as acetic acid) ester of polyol [for example, alkanetriol mono to tri

14

Acylate (for example, C canolecan trio such as monoacetin, diacetin, triacetin)

3-6

Mono- to tri-C acylate, preferably glycerin mono- to tri-C acylate)

1 -4 2-3

Etc.], lower oligomers of polyol oligomers [for example, mono- to tetra-acylate of alkanetriol monomer (for example, di-C such as diglycerin tetraacetate)

3-6 Dimers of polyols such as alkanetriol monomono to tetra C acylate)

14

Or trimer lower fatty acid ester, etc.].

[0072] Among these plasticizers, as a plasticizer combined with a carrier composed of cellulose ester (particularly cellulose acetate), acetins (for example, diacetin, triacetin, etc.) are excellent in terms of swelling ability with respect to the carrier. A lower fatty acid ester of a polyol such as glycerin di to triacetate is preferably used. In particular, among the lower fatty acid esters of polyols, polyol di- or tri-C acrylates (especially di- or di-C acrylates), which are excellent in their ability to improve the ability to adsorb aldehydes of polysaccharides containing the amino group, can be obtained.

14

C-alkanetriol or di-C acylate such as acetylin)

3-6 1 -4

I can. Therefore, a plasticizer (particularly acetins) composed of at least polyol di or triacylate (particularly diacetin, triacetin, etc.) may be suitably used as the plasticizer combined with the carrier composed of the cellulose ester.

[0073] In particular, the plasticizer is a polyol diacylate (especially a C 2 alkanetri such as diacetin).

3-6

All-the-C acylate), for example diacetin and triacete You may comprise with chin.

[0074] Depending on the triacetin used, diacetin and monoacetin may be included, and industrial triacetin usually contains diacetin and monoacetin as impurities. In a plasticizer comprising at least a polyol di C acylate (particularly diacetin),

14

The content of polyol di C acylate (especially diacetin) depends on the plasticizer (especially

14

Class) 1% by weight or more of the whole (for example, about 2 to 100% by weight), preferably 3 to 80% by weight or more, more preferably about 5 to 60% by weight (for example, 8 to 40% by weight) Moyore. In addition, by combining diacetin and other acetins (particularly triacetin), the viscosity of the dispersion can be increased moderately while enhancing the adsorption performance of aldehydes. Such polyol lower fatty acid esters (particularly diacetin, triacetin, and mixtures thereof) not only have excellent plasticizing ability of cellulose esters, but also have the ability to relax hydrogen bonds of the amino groups of the polysaccharide. Therefore, the selective removal of aldehydes (particularly formaldehyde) can be enhanced, and the safety is high and it can be suitably used.

[0075] The plasticizers may be used alone or in combination of two or more.

[0076] It should be noted that the dispersion medium capable of plasticizing the carrier is usually liquid (liquid at room temperature). In addition, the dispersion medium capable of plasticizing the carrier usually has a relatively high boiling point [for example, boiling point 150 to 500 ° C, preferably 200 to 450 ° C, more preferably 220 to 400 ° C (for example, if aligned). , About 250 to 380 ° C), and often remains on the carrier or tobacco filter material that will volatilize or dry after the adhesion treatment. Therefore, normally, the dispersion medium capable of plasticizing the carrier may be non-volatile.

[0077] The dispersion medium capable of plasticizing a preferred carrier depends on the kind of the carrier, but from the viewpoint of oral safety for humans, a lower fatty acid ester of polyol (for example, glycerin tri-C acylate such as triacetin, etc.) ) Etc. are included. Dispersion that can plasticize the carrier

2-3

The media may be used alone or in combination of two or more.

In the present specification, the dispersion medium includes a solid (solid at room temperature) dispersion medium as long as it can be dissolved in a liquid dispersion medium (the polar solvent, the plasticizer, or the like). That is, the dispersion medium may be composed of a solid dispersion medium and a dispersion medium that can dissolve the dispersion medium. Such a solid dispersion medium remains on the carrier even after the adhesion treatment (and drying). Thus, like the moisturizing polar solvent, it can act as a moisturizing component.

[0079] As the solid dispersion medium, for example, a synthetic polymer having a hydroxyl group or an ether bond (ether group) [polybutyl alcohol, polyalkylene glycol (polyethylene oxide, polypropylene oxide, polyethylene oxide-polypropylene). , Etc.], natural polymers (gelatin, dextrin, starch, etc.), cellulose derivatives (hydroxychenotinosenorerose, hydroxypropenoresenorerose, hydroxyenolequinolesose, ethinorehydroxy, etc.) Alkenoquinones such as ethinoresenololose, cellulose derivatives having hydroxyl groups such as hydroxy oleorenocene mouth, carboxyalkyl cellulose such as carboxymethyl cellulose, alkyl cellulose such as ethyl cellulose Cellulose ethers, etc.), carbohydrates (or sugars) [for example, monosaccharides (eg, xylose, glucose, etc.), disaccharides (cellobiose, trehalose, etc.), sugar alcohols (eg, inositols, such as inositol, bornecitol, etc.) , Xylitol, etc.). Solid dispersion media may be used alone or in combination of two or more.

[0080] Representative dispersion media include (1) a dispersion medium (such as the above-described solid moisturizing component) composed of water and / or monools (such as alcoholic alcohols including the polyols). (2) A dispersion medium composed of the plasticizer (such as a lower fatty acid ester of a polyol) (including the solid moisturizing component, etc.) Is included.

[0081] A preferable dispersion medium includes a dispersion medium containing the moisturizing polar solvent, for example, (la) water and / or monols and the moisturizing polar solvent (for example, polyols such as glycerin). And (2a) a dispersion medium composed of the plasticizer and the moisturizing polar solvent.

[0082] The ratio of the moisturizing polar solvent (polar solvent as the moisturizing component) to the dispersion medium containing the moisturizing polar solvent is the entire dispersion medium (or the dispersion medium) constituting the dispersion. relative partial dispersion medium) in the solution, 0. 01: 100 wt% (e.g., can be selected from the range of 0.05 to 50% by weight), for example, 0.:!～ 30 weight ^_0/0, preferably it is from 0.3 to 20 weight ^_0/0, more preferably from 0.5 to 15 wt% (e.g., 1: 10 wt%) may be about.

[0083] In particular, the ratio of the moisturizing polar solvent in the dispersion liquid of the above embodiment (la) is, for example, 0.05 to 30% by weight with respect to 100 parts by weight of water and / or monools. Part (for example, 0. :! To 20 parts by weight), preferably about 0.3 to about 15 parts by weight, and more preferably about 0.5 to about 10 parts by weight (eg, about! To 8 parts by weight).

[0084] Depending on the type of the dispersion medium to be used and the combination thereof, there are cases where various characteristics can be imparted to the obtained tobacco filter material. For example, Al force nools (C

1-4) When a dispersion medium containing a polar solvent such as lucanol is used, swelling of the polysaccharide in the dispersion medium can be effectively suppressed or prevented, or the surface area of the polysaccharide attached to the carrier can be efficiently reduced. Seems to be able to increase. In addition, when a dispersion medium containing a polar solvent such as water or polyols is used, aggregation of the polysaccharide in the dispersion medium causes swelling, and the surface area of the polysaccharide attached to the carrier tends to be small. The effect of hydrogen bonding of the hydroxyl group of the polysaccharide can be reduced and the selective removal of formaldehyde can be improved ^! There is a direction.

[0085] [Material for tobacco filter]

In the cigarette filter material of the present invention, polysaccharides having amino groups are attached to the carrier. The shape of the polysaccharide adhering to the carrier usually corresponds to the shape of the polysaccharide in the dispersion and is often granular. Further, the adhering powdery polysaccharide may be aggregated.

[0086] In the cigarette filter material of the present invention, the adhesion amount (or content or attachment amount) of the polysaccharide having an amino group depends on the type of the dispersion medium, but with respect to 100 parts by weight of the carrier. Can be selected from the range of 100 parts by weight or less (for example, 1 to: about 100 parts by weight), for example: !! to 80 parts by weight, preferably 60 parts by weight or less (for example, about 2 to 60 parts by weight), preferably 40 parts by weight or less (for example, about 3 to 40 parts by weight), particularly 30 parts by weight or less (for example, about 4 to 30 parts by weight), usually 20 parts by weight or less (for example, about 5 to 20 parts by weight) Also good. If the content of the polysaccharide having an amino group is too large, the amount of adsorbed tar or nicotine may be increased.

[0087] Further, in the tobacco filter material, the surface area (specific surface area) of the polysaccharide having an amino group attached to the carrier has the amino group depending on the type of dispersion medium, the particle size of the polysaccharide, and the like. polysaccharides lg per for example, 50 m ² or less (e.g., 0. 01~40m ^2), preferably 0.:!~ 30m ^2, more preferably it may also be about 0. 5 to 20 m ² Rere. [0088] In particular, when the above-mentioned alkanols or plasticizers are used as the dispersion medium, the surface area (specific surface area) of the polysaccharide having amino groups attached to the carrier is relatively large. polysaccharide lg per with, for example,:! ~ 50m ^2, preferably 3~30m ^2, further preferred properly is 5~20m ² (for example, 6~: 15m ²⁾ it may also be about Rere.

[0089] As described above, the surface area of the polysaccharide having an amino group varies depending on the type of the dispersion medium, and the conditions such as the type of the dispersion medium and the particle size of the polysaccharide are the same. In general, the larger the surface area of the attached polysaccharide, the higher the selective removal of aldehydes (particularly formaldehyde) in many cases. On the other hand, when a dispersion medium containing water or polyols is used, the surface area (specific surface area) of the polysaccharide having amino groups tends to be relatively small as described above. Is excellent in the ability to relax hydrogen bonds of the amino groups, and can be used as a dispersion medium and further remain on the carrier, so that even if the specific surface area is small, selective removal of aldehydes is possible. Can be increased.

[0090] In the tobacco filter material, a part or all of the dispersion medium which may be completely removed by drying (including volatilization and natural drying) remains on the carrier. It may be. In particular, a dispersion medium such as a moisturizing polar solvent such as polyol, the plasticizer, and the solid dispersion medium usually remains as it is in a tobacco filter material or carrier even after drying. Note that the volatile dispersion medium (water, alcohol, etc.) can remain on the carrier or the tobacco filter material by appropriately adjusting the drying conditions. For example, fibers having a relatively large fiber surface area such as fibers composed of cellulose acetate filaments can retain adsorbed water after a normal production process. However, this amount of water is at most several milligrams (for example, 1 to 3 mg) per lOOmg of carrier, and is usually in an absolutely dry state (especially when vacuum drying is performed). Almost 0).

[0091] In the tobacco filter material, the residual amount (attachment amount, content) of the dispersion medium is 0 to 100 parts by weight with respect to 100 parts by weight of the carrier, although it depends on the amount and concentration of the dispersion. For example, 0.5 to: 100 parts by weight (for example, 0.8 to 90 parts by weight), preferably 1 to 80 parts by weight (for example, 1.5 to 80 parts by weight), more preferably 2 to 70 parts by weight (eg 3 to 6 0 part by weight), particularly 4 to 50 parts by weight (for example, 5 to 30 parts by weight), usually 5 to 20 parts by weight (for example, 5 to 15 parts by weight).

[0092] In particular, when a dispersion medium containing the moisturizing polar solvent is used, the remaining dispersion medium is composed of a moisturizing polar solvent (particularly, polyols as a moisturizing component). The residual amount (attachment amount, content) of the polar solvent (especially polyols) can be selected from the range of 0.1 to 100 parts by weight with respect to 100 parts by weight of the carrier, for example, 1 to 100 parts by weight. Preferably, it is 2 to 60 parts by weight, more preferably 3 to 40 parts by weight, especially 5 to 20 parts by weight (eg 5 to 15 parts by weight). Water, monools (eg C alkano

1-4) and at least one selected from the above plasticizers and the residual ratio (attachment ratio, content ratio) of the moisturizing polar solvent is the former Z latter (weight ratio) = 99Z1 to 0/100, Preferably, it may be about 95Z5 to 5Z95, more preferably 90/10 to about 10/90 (for example, 85/15 to 15/8 5).

[0093] The residual amount (attachment amount, content) of the dispersion medium is 0 to 500 parts by weight, preferably 5 to 400 parts by weight, more preferably 10 parts per 100 parts by weight of the polysaccharide having an amino group. It may be about ~ 300 parts by weight (for example, 20 to 200 parts by weight). Further, when a dispersion medium containing a moisturizing polar solvent is used, the remaining dispersion medium is composed of a moisturizing polar solvent (particularly, polyols as a moisturizing component), and the moisturizing polar solvent (particularly, The residual amount (adhesion amount, content) of the polyols as a moisturizing component is, for example, from:! To 300 parts by weight, preferably 3 to 200 parts by weight, with respect to 100 parts by weight of the polysaccharide having an amino group. Preferably, it may be about 5 to 180 parts by weight (for example, 8 to 150 parts by weight), particularly about 10 to 120 parts by weight.

[0094] In particular, when a dispersion medium containing a polar solvent having a hydroxyl group [water, alcohols (monools, polyols, etc.), etc.] is used, the residual amount of the dispersion medium (attachment amount, content) Is 0.1 mol or more in terms of the hydroxyl group of the dispersion medium (or the total amount of the hydroxyl group of the entire dispersion medium) with respect to 1 mol of the dullicose (or monosaccharide) unit of the polysaccharide having an amino group. (For example, about 0.3 to 500 mol), for example, 0.5 mol or more (for example, about 0.8 to 300 mol), preferably 1 mol or more (for example, about 1.2 to 150 mol), Preferably, it should be 1.5 monoles or more (tap-free) or 1.6-about 100 monole, special (about 1.8-80 monole (tap-free, 2-50 monole) Also good. [0095] In the tobacco filter material of the present invention, the amount of amino group-containing polysaccharide or dispersion medium used may be adjusted according to the material or the length of the filter. For example, when the length of the filter is short, the permeability of nicotine and tar increases, so the amount of polysaccharide having an amino group may be increased and the amount of the dispersion medium is increased accordingly. Also good.

[0096] The cigarette filter material further includes other components such as inorganic fine powder (kaolin, talc, diatomaceous earth, quartz, calcium carbonate, barium sulfate, titanium oxide, alumina, etc.), heat stabilizer (alkaline). Or alkaline earth metal salts), colorants, whiteness improvers, oils, yield improvers, sizing agents, adsorbents (such as activated carbon), biodegradation or photodegradation accelerators (such as anatase titanium oxide), natural It may contain a polymer or a derivative thereof (such as cellulose powder). Other ingredients can be used alone or in combination of two or more

[0097] The shape of the material for a tobacco filter of the present invention is not particularly limited, and may be, for example, a fiber shape, a hair shape, a woven fabric shape, a nonwoven fabric shape, a tow shape, a sheet shape, or a particle shape (depending on the shape of the carrier). Or any shape such as a granular form). Also, the shape of the cigarette filter material may be a filter shape (filter rod shape). These shapes are obtained by using a conventional method (for example, a fibrous carrier, a particulate carrier, etc.) which may be previously possessed by a carrier (that is, a carrier before the adhesion treatment). For example, it may be formed or shaped by papermaking. In particular, the tobacco filter material preferably has a tow shape (or a tow structure, particularly a fiber tow shape) as described above.

[0098] [Method for producing tobacco filter material]

The material for tobacco filter of the present invention can be obtained by subjecting the carrier to the dispersion (dispersion composed of a polysaccharide having a powdered amino group and a dispersion medium for the polysaccharide). . That is, the material for a tobacco filter of the present invention is generally a polysaccharide having at least an amino group after the support is attached with the dispersion liquid [and a dispersion medium (such as the moisturizing polar solvent, etc., if necessary)]. Can be obtained by attaching (or containing) to a carrier.

[0099] The adhesion treatment method (treatment method) can be appropriately selected according to the shape of the carrier (fibrous, filter-like, etc.), the type, etc. If the carrier and the dispersion can be brought into contact with each other. For example, G) a method of immersing (or impregnating, dating) the carrier in the dispersion, (ii) a method of spraying or spraying (or spreading) the dispersion on the carrier, and (m) a carrier. Examples thereof include a method of applying the dispersion liquid. These treatment methods may be used alone or in combination of two or more.

[0100] Such a treatment method of the present invention may be introduced into an existing manufacturing apparatus for cigarette filters, in particular, an apparatus for manufacturing cigarette filters having a tow structure using cellulose acetate filaments. In the spinning process of filter tow, the polysaccharide (and dispersion medium) may be adhered to the carrier by contacting with the above method (spraying, coating, dipping, etc.). Furthermore, the polysaccharide (and the carrier) is spread on the carrier by a method such as spraying, coating, and dipping in the process of winding the tow band from a filter tow band packing material (bale) and forming it into a filter rod (winding process). A dispersion medium) may be attached. Further, the polysaccharide may be applied to the carrier by a method such as dipping in the produced tow bundling body (plug).

(And dispersion medium) may be attached.

[0101] Among these methods, the method (ii) in which the dispersion is sprayed or dispersed on a carrier is preferable. In such a method, in particular, when the carrier is a fibrous substance (for example, a carrier having a tow structure), a polysaccharide (and a dispersion medium) having an amino group with respect to the carrier (or a part where the carrier is immersed). Can be easily and efficiently contained.

[0102] The treatment with the dispersion liquid may be performed on a part or all of the carrier. In particular, in the case of a toe-structured carrier, in the filter plug forming process (winding-up process) of the tow-structured filter. The dispersion liquid can be disposed or installed as a part of a plasticizer adding device for filter tow, such as the plasticizer (triacetin, etc.), and adhered to the filter tow. In this case, it is not necessary that all of the tow has been treated with the dispersion. In the method of immersing ω, the adhesion treatment may be performed on at least the entire surface of the support (or the immersed portion of the support) (preferably the surface of the immersed portion and the entire interior of the support).

[0103] In the dipping method G), the dipping time (or treatment time) can be selected depending on the content and content of the polysaccharide having an amino group, and is, for example, 0.001 second or longer (eg, 0 001 seconds to 24 hours), preferably 0.005 seconds to 1 hour, more preferably about 0.01 seconds to 30 minutes, for example, 0.001 seconds or more (for example, 0. 003 seconds or more) It may be sufficient, Preferably it is 0.003 to 30 less, More preferably, 0.005 to about 15 may be sufficient.

[0104] The carrier subjected to the adhesion treatment with the dispersion medium is usually dried. By such drying, some or all of the volatile components such as volatile dispersion media (water, alkanols, etc.) may be completely removed or may remain. By appropriately adjusting the drying conditions, the content of the dispersion medium (volatile dispersion medium) remaining on the carrier can be adjusted.

[0105] Drying can be selected according to the type of dispersion medium (volatile polar solvent, moisturizing polar solvent, etc.) and the amount of dispersion medium to be left, and may be natural drying or air drying. This is often done using a dryer that can be decompressed (such as a vacuum dryer) or a hot-air dryer.

[0106] Drying may be performed at room temperature (for example, about 15 to 25 ° C) under heating (for example, 40 to 200 ° C, preferably 45 to: 180 ° C, more preferably 50). ~: About 150 ° C). The drying may be performed under normal pressure or reduced pressure. The drying time depends on the drying temperature, drying pressure, type of dispersion medium, etc. For example, 1 minute or more (for example, 3 minutes to 24 hours), preferably 5 minutes to 18 hours (for example, 10 minutes to 12 hours) More preferably, it may be about 20 minutes to 10 hours (for example, 30 minutes to 8 hours).

[0107] [Tobacco filters and tobacco]

The tobacco filter material of the present invention is useful for constituting a tobacco filter. The cigarette filter may be composed of the cigarette filter material of the present invention singly or in combination of two or more according to the form of the cigarette filter material, and other cigarette filter materials of the present invention. For example, the material may be composed of a powdered tobacco filter material that has been coated, and the fibrous material (such as a coated fiber or a fibrous material). For example, the cigarette filter of the present invention constitutes at least one divided portion of a cigarette filter having a structure divided into a plurality of parts (two (dual), three (such as triple)) (for example, , One part of a two-divided filter, both ends of a three-divided filter, etc.) and another part (for example, the other part of a two-divided filter, the middle part of a three-divided filter) Other tobacco filter materials [For example, filter materials filled with particulate matter such as activated carbon (activated carbon Any part that contains particulate matter (such as dalmatian parts) and any part that does not contain particulate matter, other parts (such as natural filter material), etc.].

[0108] The cigarette filter can be formed by a conventional method depending on the structure of the carrier or the filter. For example, a filter with a tow structure (filter with a filter rod) opens the cigarette filter material, attaches a conventional plasticizer such as triacetin, converges it to a specified diameter, and fixes it with paper. You can also use a plug hoist to form a filter plug. Further, the non-toe-structured filter is a conventional method, for example, (a) a method in which a filter material such as a fiber or powder is directly filled in a filter rod molding die to form a filter plug, (b) You may manufacture by the method of filling the said filter raw material in the space of the filter plug shape | molded previously.

[0109] Since the cigarette filter of the present invention is composed of the cigarette filter material, it can efficiently remove aldehydes such as formaldehyde while maintaining taste components such as nicotine and tar at a high level. Therefore, in the present invention, by constituting the cigarette filter (or cigarette) with the cigarette filter material, aldehydes (particularly formaldehyde) in the cigarette smoke passing through the cigarette filter 1 (or cigarette) are reduced. A method of reducing [specifically, a method of reducing aldehydes (particularly formaldehyde) while retaining nicotine and tar in the tobacco smoke passing through the tobacco filter] is also included.

[0110] For example, the formaldehyde retention rate (weight conversion) of the cigarette filter is 90% or less.

(For example, 0 to 88%), for example, 85% or less (for example, 3 to 80%), preferably 70% or less (for example, 5 to 65%), more preferably 65% or less (for example, 10-60%), especially about 50% or less (for example, 15-45%), and formaldehyde can be removed at a high level.

[0111] Further, the nicotine retention rate (weight conversion) and tar retention rate (weight conversion) of the tobacco filter can be selected from a range of 50% or more (for example, 55 to 100%), for example, 60% or more (for example, 65 to: 100%), preferably 70% or more (for example, 75 to 99%), more preferably 75% or more (for example, 80 to 98%), particularly 80% or more (for example, 85 -97 %).

[0112] In particular, the tobacco filter has a nicotine retention rate (weight conversion) of 60% or more (for example,

65-: 100%), for example, 70% or more (for example, 75-99%), preferably 80% or more (for example, 82-98%), more preferably 85% or more (for example, 88-97%). Further, the tar retention (in terms of weight) of the tobacco filter can be selected from a range of 50% or more (for example, 55 to: 100./), for example, 55. /. (For example, 60 to 100%), preferably 65% or more (for example, 70 to 99.9%), more preferably 70% or more (for example, 75-99.5%), particularly 75% or more (for example, 80-99%).

[0113] The retention rate (formaldehyde retention rate, nicotine retention rate, tar retention rate) is the amount of formaldehyde in the tobacco smoke that passes through the tobacco filter composed of the tobacco filter material before coating treatment ( Or nicotine or tar). In other words, the “retention ratio” means that the tobacco filter made of the non-coated tobacco filter material (or the non-coated tobacco filter material) is subjected to predetermined conditions (flow rate, time, frequency, etc.). ) The amount of formaldehyde (or nicotine or tar) in the cigarette smoke that passes in (1) is X, and this formaldehyde (or nicotine or tar) X passes under the same conditions (flow rate, time, frequency, etc.) as X. When the amount of formaldehyde (or nicotine or tar) in the cigarette smoke is γ, it is expressed by the following formula.

[0114] Retention (%) = (Y / X) X 100.

[0115] Further, in the present invention, since a carrier treated with a dispersion containing a polysaccharide having an amino group and a dispersion medium is used, it can be incorporated into a cigarette filter without increasing the airflow resistance of the tobacco filter. . Therefore, the cigarette filter of the present invention has air permeability suitable for cigarette smoke, and the cigarette filter has a ventilation resistance of 120 mm in length and 24.5 ± 0.2 mm in circumference. 17. Range force of 150-600mm WG (water gauge) can be selected when measured by pressure loss when passing air at 5ml / sec, eg 180-500mm WG, preferably 200-450mm WG (eg 220- 400 mmWG), more preferably about 250 to 350 mmWG.

[0116] Further, the cigarette of the present invention comprises the cigarette filter (or the cigarette filter material). I have. The location of the cigarette filter is not particularly limited, but in the case of cigarettes that are formed into a rod shape by paper, they are often placed at the mouth or between the mouth and the cigarette. In addition, the cross-sectional outer periphery of the cigarette often corresponds to the cross-sectional outer periphery of the filter, and is usually 15 to 30 mm, preferably about 17 to 27 mm. Industrial applicability

[0117] The tobacco filter material of the present invention is useful for constituting a tobacco filter (and tobacco). In such a cigarette filter (and cigarette) of the present invention, at the time of smoking, while maintaining the taste components such as nicotine and tar, it is possible to maintain an appropriate ventilation resistance. It can selectively remove aldehydes such as formaldehyde that are harmful to the human body without impairing the feeling.

Example

[0118] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples. In the following examples and comparative examples, the characteristics (ventilation resistance, nicotine content, tar content, formaldehyde content) are as follows: commercially available tobacco [Peace 'Light' Box (registered trademark No. 2122839) (Nippon Tobacco Inc.) The product was measured by the following method.

[0119] [Ventilation resistance]

The ventilation resistance of the above-mentioned tobacco [Peace Light Box (Registered Trademark No. 2122839) (manufactured by Japan Tobacco Inc.)] was directly measured using a filter sample for tobacco smoke including a tobacco leaf portion. In this sample, the length of the filter part was 25 mm and the circumference was about 25 mm. Ventilation resistance was measured using an automatic ventilation resistance measuring instrument (Filtrona, FTS300) when passing air at a flow rate of 17.5 ml / sec through a filter sample for tobacco smoke. did.

[0120] [Amount of nicotine, amount of tar]

Using a cigarette smoke filter sump nore, piston type constant volume automatic smoker (RM20 / CS, manufactured by Boulder Waldo), with a flow rate of 17.5 ml / second, smoking time 2 seconds / time, smoking frequency 1 time / minute Smoking was performed under conditions. The nicotine and tar in the smoke that has passed through the filter are collected by a glass fiber filter (Cambridge filter). It was measured using Hitachi, Ltd. G-3000.

[0121] The amount of tar was measured by a gravimetric method.

[0122] The amounts of nicotine and tar adhering to the control Cambridge filter are Tn and Τt, respectively, and the amounts of nicotine and tar adhering to the Cambridge filter in Comparative Examples and Examples are Cn and Ct, respectively. Tar removal rate was calculated.

[0123] Nicotine removal rate (%) = 100 X (1 -Cn / Tn)

Tar removal rate (%) = 100 (1 -Ct / Tt) ₀

[0124] [Formaldehyde removal rate]

Using a tobacco smoke filter sump nore, piston type constant capacity automatic smoker (RM20 / CS manufactured by Boulder Waldo), smoking time 2 seconds / time, smoking frequency 1 time / Smoking was performed under the condition of minutes. Formaldehyde in the smoke that has passed through the filter is collected with DN PH (dinitrophenylhydrazine) solution, derivatized with DNPH, and then UV (using gas chromatograph (G-3000 manufactured by Hitachi, Ltd.)) (UV) absorbance was measured.

[0125] The formaldehyde removal rate was calculated according to the following equation using the amount of formaldehyde collected in the control product as Tf and the amount of formaldehyde collected in the following Comparative Examples and Examples as Cf.

[0126] Formaldehyde removal rate (%) = 100 X (1— Cf / Tf).

[0127] (Comparative Example 1)

In Comparative Example 1, chitosan particles were used. Chitosan particles were prepared by crushing “Daichitosan M” manufactured by Dainichi Seika Kogyo Co., Ltd. using a powder mill. The chitosan particles passed through a sieve with a force of 4 k, 28 mesh, and particles that did not pass 60 mesh were collected.

[0128] Commercially available tobacco [Peace 'Light' Box (Registered Trademark No. 2122839) (manufactured by Japan Tobacco Inc.)] Cellulose diacetate crimped fiber tow filter body (25mm) Cut with force razor. Insert a glass tube with a length of 20 mm and an inner diameter of 8 mm into the cut long piece, that is, the tobacco leaf-filled piece for a length equivalent to the length of the remaining filter (1 lmm), and bind them with sealing tape. .

[0129] A space of 9 mm generated by the glass tube was filled with 20 mg of the chitosan powder. Next The glass tube was plugged using a short piece cut first, that is, a 14 mm filter section (11 Omg). A sealing tape was also applied to the connecting portion between the glass tube and the filter to close it tightly. Accordingly, the filter length of the cellulose diacetate crimped fiber tow is 25 mm. The extended 9 mm portion between the filters was filled with chitosan particles. The loading of chitosan particles was 20 mg per cigarette.

[0130] The ventilation resistance, nicotine, tar content, and formaldehyde content of the filter sample for tobacco smoke were measured. Then, the obtained nicotine, tar and formaldehyde removal rate (reduction rate) was calculated by the above formula. The results are shown in Table 1.

[0131] As a control product for evaluating the removal rate of nicotine, tar and formaldehyde, a product produced in the same manner as described above was used except that chitosan particles were not filled.

[0132] (Comparative Example 2)

In Comparative Example 2, activated carbon, which is commonly used for cigarette smoke filters, was used. As activated carbon

Was crushed coal CW350SZ manufactured by Nimura Chemical Co., Ltd. The crushed charcoal was sieved to collect particles that passed through 30 mesh but not through 50 mesh. In the same manner as in Comparative Example 1, activated carbon was filled between the filters. The filling amount of activated carbon was 20 mg per cigarette.

[0133] The cigarette sample was measured for the ventilation resistance, nicotine, tar content, and formaldehyde content. The resulting nicotine, tar and formaldehyde removal rates were calculated using the above formula. The results are shown in Table 1.

[0134] As a control product for evaluating the removal rate of nicotine, tar and formaldehyde, a product prepared in the same manner as described above was used except that the activated carbon was not filled.

[Example 1]

In the same manner as in Comparative Example 1, a 14 mm portion from the end of the filter body (25 mm) of the cellulose diacetate crimped fiber tow was cut with a force razor. A glass tube having a length of 20 mm and an inner diameter of 8 mm was inserted into a part of the cut long piece, that is, a tobacco leaf filling piece for a length (11 mm) corresponding to the length of the remaining filter, and these were bound with a sealing tape. [0136] The cut short piece, that is, the 14 mm filter part, was mixed with chitosan aqueous dispersion containing 2% by weight of chitosan with a degree of deacetylation of 95% (Daichi Seika Kogyo Co., Ltd., “Daichitosan FP slurry” with water. Soaked for 10 minutes. Part of the soaked filter was placed in a vacuum dryer and dried for 8 hours and 30 minutes at a temperature of 22 ° C and an atmospheric pressure of 80 mmHg. Chitosan adhering to a part of the filter obtained after drying is 13 mg and water Omg, and the specific surface area of chitosan adhering to the carrier is less than lm ² per lg of chitosan (lower limit of measurement is 0.92 m ² or less). It was hot.

[0137] Using a 14 mm filter section after drying, the 9 mm space created by the glass tube was plugged. Sealing tape was also sealed at the connection between the glass tube and the filter. Therefore, the length of the cellulose diacetate crimped fiber tow filter is 25 mm.

[0138] The above-mentioned ventilation resistance, nicotine, tar content, and formaldehyde content of the filter sample for tobacco smoke were measured. The obtained sample had a nicotine retention rate of 98%, a tar retention rate of 100%, a formaldehyde removal rate of 19% (ie, a retention rate of 81%), and a ventilation resistance of 162 mmWG.

[0139] A control product for evaluating the removal rate of nicotine, tar and formaldehyde was prepared in the same manner as described above, except that it was used without any treatment on a cut 14 mm filter strip. Was used.

[0140] (Example 2)

In the same manner as in Comparative Example 1, a 14 mm portion from the end of the filter body (25 mm) of the cellulose diacetate crimped fiber tow was cut with a force razor. A glass tube having a length of 20 mm and an inner diameter of 8 mm was inserted into a part of the cut long piece, that is, a tobacco leaf filling piece for a length (11 mm) corresponding to the length of the remaining filter, and these were bound with a sealing tape.

[0141] The cut short piece, that is, the 14 mm filter part, is a chitosan aqueous dispersion containing 2% by weight of chitosan with a degree of deacetylation of 95% (Daichi Seika Kogyo Co., Ltd., "Daichitosan FP slurry" with water. Soaked for 10 minutes. Part of the filter after immersion was placed in a vacuum dryer and dried for 5 hours under conditions of a temperature of 22 ° C and an atmospheric pressure of 80 mmHg. Chitosan adhering to the filter part obtained after drying was 13 mg and water 71 mg. The specific surface area of Tosan was less than lm ² per lg of chitosan (lower limit of measurement: 0 · 92 m ² or less).

[0142] Using a 14 mm filter section after drying, the 9 mm space created by the glass tube was plugged. Sealing tape was also sealed at the connection between the glass tube and the filter. Therefore, the length of the cellulose diacetate crimped fiber tow filter is 25 mm.

The cigarette smoke filter sample was measured for the ventilation resistance, nicotine, tar content, and formaldehyde content. The resulting sample has a nicotine retention rate of 83%, a tar retention rate of 100%, and a formaldehyde removal rate of 45. / ₀ (ie retention rate 55%), ventilation resistance was 179mmWG.

[0144] As a control product for evaluating the removal rate of nicotine, tar and formaldehyde, it was prepared in the same manner as above except that it was used without any treatment on a cut 14 mm filter strip. Was used.

[0145] (Example 3)

[0146] Chitosan aqueous dispersion containing 2% by weight chitosan with 95% deacetylation degree (Daichi Seika Kogyo Co., Ltd., "Daichitosan FP slurry" with water Soaked for 10 minutes. Part of the filter after immersion was placed in a vacuum dryer and dried for 6 hours and 15 minutes at a temperature of 22 ° C and an atmospheric pressure of 80 mmHg. Chitosan adhering to a part of the filter obtained after drying was 13 mg and water 19 mg, and the specific surface area of chitosan adhering to the carrier was less than lm ² per lg of chitosan (lower limit of measurement was 0.92 m ² or less). It was hot.

[0147] Using a 14 mm filter part after drying, a 9 mm space formed by the glass tube was plugged. Sealing tape was also sealed at the connection between the glass tube and the filter. Therefore, the length of the cellulose diacetate crimped fiber tow filter is 25 mm. [0148] The cigarette smoke filter sample was measured for the ventilation resistance, nicotine, tar content, and formaldehyde content. The obtained sample had a nicotine retention rate of 89%, a tar retention rate of 97%, a formaldehyde removal rate of 64% (ie, retention rate of 36%), and an air resistance of 168 mmWG.

[0149] A control product for evaluating the removal rate of nicotine, tar and formaldehyde was prepared in the same manner as above except that it was used without any treatment on a cut 14 mm filter strip. Was used.

[0150] (Example 4)

[0151] Chitosan aqueous dispersion containing 2% by weight of chitosan with 95% deacetylation degree (Daichi Seika Kogyo Co., Ltd., "Daichitosan FP slurry" with water The sample was immersed for 10 minutes in a dispersion containing 1% by weight of glycerin. Part of the filter after immersion was placed in a vacuum dryer and dried for 8 hours and 30 minutes under the conditions of a temperature of 22 ° C and an atmospheric pressure of 80 mmHg. The chitosan adhering to a part of the filter obtained after drying is 13 mg and 7 mg of glycerin. The specific surface area of chitosan adhering to the carrier is less than lm ² per lg of chitosan (lower limit of 0.92 m). ² or less).

[0152] Using a 14 mm filter section after drying, the 9 mm space created by the glass tube was plugged. Sealing tape was also sealed at the connection between the glass tube and the filter. Therefore, the length of the cellulose diacetate crimped fiber tow filter is 25 mm.

[0153] The ventilation resistance, nicotine, tar amount, and formaldehyde amount were measured for the cigarette smoke filter sample. The obtained sample has a nicotine retention rate of 99%, a tar retention rate of 86%, and a formaldehyde removal rate of 51. / ₀ (i.e., retention 49./ _0), passing air resistance was 158MmWG.

[0154] As a control product for evaluating the removal rate of nicotine, tar and formaldehyde The 14 mm filter strip was used in the same manner as above except that it was used without any treatment.

[Example 5]

[0156] A cut short piece, ie, a 14 mm filter part, was mixed with chitosan aqueous dispersion containing 2% by weight of chitosan with a degree of deacetylation of 95% (Daichi Seika Kogyo Co., Ltd., "Daitotosan FP slurry" with water. 3 times diluted) and further immersed in a dispersion containing 4% by weight of glycerin for 10 minutes. Part of the filter after immersion was placed in a vacuum dryer and dried for 8 hours and 30 minutes under the conditions of a temperature of 22 ° C and an atmospheric pressure of 80 mmHg. Chitosan adhering to a part of the filter obtained after drying was 14 mg and 27 mg glycerin. The specific surface area of chitosan adhering to the carrier was less than lm ² per lg of chitosan (lower limit of measurement: 0.92 m ² or less) )Met.

[0157] Using a 14 mm filter section after drying, the 9 mm space created by the glass tube was plugged. Sealing tape was also sealed at the connection between the glass tube and the filter. Therefore, the length of the cellulose diacetate crimped fiber tow filter is 25 mm.

[0158] The cigarette smoke filter sample was measured for the ventilation resistance, nicotine, tar content, and formaldehyde content. The obtained sample had a nicotine retention rate of 94%, a tar retention rate of 93%, a formaldehyde removal rate of 72% (ie, a retention rate of 28%), and an air resistance of 162 mmWG.

[0159] A control product for evaluating the removal rate of nicotine, tar and formaldehyde was prepared in the same manner as above except that it was used without any treatment on a cut 14 mm filter strip. Was used.

[Example 6]

In the same manner as in Comparative Example 1, a 14 mm portion from the end of the filter body (25 mm) of the cellulose diacetate crimped fiber tow was cut with a force razor. Cut long pieces, ie tobacco leaves A glass tube with a length of 20 mm and an inner diameter of 8 mm was inserted into a part of the filter of the filled piece by a length (11 mm) corresponding to the length of the remaining filter, and these were bound with sealing tape.

[0161] The cut short piece, ie, the 14 mm filter part, was immersed in an ethanol dispersion of chitosan containing 6% by weight of chitosan having a deacetylation degree of 90% (manufactured by Dainichi Seika Kogyo Co., Ltd.) for 10 minutes. A part of the filter after immersion was placed in a vacuum dryer and dried for 5 hours under conditions of a temperature of 22 ° C and an atmospheric pressure of 80 mmHg. The amount of chitosan adhered to a part of the filter obtained after drying was 30 mg, and the specific surface area of chitosan adhering to the carrier was 9.8 m ² per lg of chitosan.

[0162] Using a 14 mm filter section after drying, the 9 mm space created by the glass tube was plugged. Sealing tape was also sealed at the connection between the glass tube and the filter. Therefore, the length of the cellulose diacetate crimped fiber tow filter is 25 mm.

[0163] The cigarette smoke filter sample was measured for the ventilation resistance, nicotine, tar amount, and formaldehyde amount. The obtained sample had a nicotine retention rate of 96%, a tar retention rate of 87%, a formaldehyde removal rate of 66% (ie, a retention rate of 34%), and an air resistance of 186 mmWG.

[0164] As a control product for evaluating the removal rate of nicotine, tar and formaldehyde, it was prepared in the same manner as above except that it was used without any treatment on a cut 14 mm filter strip. Was used.

[0165] (Example 7)

[0166] The cut short piece, that is, a 14 mm filter part, was added to an ethanol dispersion of chitosan containing 6% by weight of chitosan with a degree of deacetylation of 90% (manufactured by Dainichi Seika Kogyo Co., Ltd.) and 3% by weight of glycerin. It was immersed in the added dispersion for 10 minutes. The filter part after immersion was put into a vacuum dryer and dried for 5 hours under conditions of a temperature of 22 ° C and an atmospheric pressure of 80 mmHg. Obtained after drying The chitosan adhering to a part of the filter was 30 mg and the glycerin was 15 mg, and the specific surface area of the chitosan adhering to the carrier was 7.5 m ² per lg of chitosan.

[0167] Using a 14 mm filter section after drying, the 9 mm space formed by the glass tube was plugged. Sealing tape was also sealed at the connection between the glass tube and the filter. Therefore, the length of the cellulose diacetate crimped fiber tow filter is 25 mm.

[0168] The ventilation resistance, nicotine, tar amount, and formaldehyde amount were measured for the cigarette smoke filter sample. The obtained sample has a nicotine retention rate of 88%, a tar retention rate of 76%, and a formaldehyde removal rate of 77%. / ₀ (i.e., retention 23./ _0), passing air resistance was 182MmWG.

[0169] As a control product for evaluating the removal rate of nicotine, tar and formaldehyde, it was prepared in the same manner as described above, except that the cut 14 mm filter strip was used without any treatment. Was used.

[Example 8]

Of cellulose diacetate crimped fiber tow (manufactured by Daicel Chemical Industries) with filament denier 2.2 and total denier 40,000 chitosan containing 90% deacetylated 90% chitosan as plasticizer A triacetin dispersion (manufactured by Dainichi Seika Kogyo Co., Ltd.) is attached and focused, and a cigarette filter rod with a length of 100 mm and an outer diameter of 8 mm is produced by an automatic winder, and this is divided into four equal parts in the length direction. Cutting was performed to obtain a filter chip having a length of 25 mm. The chitosan adhering to this 25 mm long filter chip was 16 mg and triacetin was 23.8 mg, and the specific surface area of chitosan adhering to the carrier was 6.8 m ² per lg of chitosan.

[0171] Commercially available tobacco [Peace 'Light' Box (Registered Trademark No. 2122839) (manufactured by Japan Tobacco Inc.)] Cut the cellulose diacetate crimped fiber tow filter body (25mm) with force razor . Only 11 mm of a glass tube having a length of 20 mm and an inner diameter of 8 mm was inserted into the cut long piece, that is, a tobacco leaf filling piece, and these were bound with a sealing tape. Using the filter chip prepared using a chitosan triacetin dispersion as a plasticizer, a 9 mm space formed by the glass tube was plugged. And this glass tube and filter connection The part was sealed with sealing tape. Accordingly, the filter length of the cellulose diacetate crimped fiber tow is 25 mm.

[0172] The cigarette smoke filter sample was measured for the ventilation resistance, nicotine, tar amount, and formaldehyde amount. The obtained sample has a nicotine retention rate of 93%, a tar retention rate of 97%, and a formaldehyde removal rate of 38%. / ₀ (i.e., retention 62./ _0), passing air resistance was 164MmWG.

[0173] In addition, as a control product for evaluating the removal rate of nicotine, tar and formaldehyde, a product prepared in the same manner as described above was used except that triacetin was used as a plasticizer.

[Example 9]

Filament denier 2.2, total denier 40,000 cellulose diacetate crimped fiber tow (manufactured by Daicel Chemical Industries) and chitosan containing 40% by weight of chitosan with 90% deacetylation as plasticizer Triacetin dispersion (manufactured by Dainichi Seika Kogyo Co., Ltd.) A cigarette with a length of 100 mm and an outer diameter of 8 mm is attached with an automatic hoisting machine with 10 parts by weight of glycerin added to 100 parts by weight. A filter rod was prepared and cut into four equal parts in the length direction to obtain a filter chip with a length of 25 mm. The chitosan adhering to this 25 mm long filter tip is 15 mg, triacetin is 22.5 mg, glycerin is 2 mg, and the specific surface area of chitosan adhering to the carrier is 3.4 m ² per lg of chitosan. It was.

[0175] Filter body (25mm) part of cellulose diacetate crimped fiber tow of commercial cigarette [Peace 'Light' Box (Registered Trademark No. 2122839) (manufactured by Japan Tobacco Inc.)] was cut with force razor . Only 11 mm of a glass tube having a length of 20 mm and an inner diameter of 8 mm was inserted into the cut long piece, that is, a tobacco leaf filling piece, and these were bound with a sealing tape. Using the filter chip prepared using a chitosan triacetin dispersion as a plasticizer, a 9 mm space created by the glass tube was plugged. Sealing tape was also applied to the connection between the glass tube and the filter to seal it. Accordingly, the filter length of the cellulose diacetate crimped fiber tow is 25 mm.

[0176] The cigarette smoke filter sample was measured for the ventilation resistance, nicotine, tar content, and formaldehyde content. The resulting sample has a nicotine retention rate of 93%, The retention rate was 97%, the formaldehyde removal rate was 38% (that is, the retention rate was 62%), and the air resistance was 168 mmWG.

[0177] As a control product for evaluating the removal rate of nicotine, tar and formaldehyde, a product prepared in the same manner as described above was used except that triacetin was used as a plasticizer.

[Example 10]

Filament denier 2.2, total denier 40,000 cellulose diacetate crimped fiber tow (manufactured by Daicel Chemical Industries) and chitosan containing 40% by weight of chitosan with 90% deacetylation as plasticizer Triacetin dispersion (manufactured by Dainichi Seika Kogyo Co., Ltd.) A cigarette filter with a length of 100mm and an outer diameter of 8mm is attached by an automatic hoisting machine with a mixture of 10 parts by weight of diacetin added to 100 parts by weight. A rod was made and cut into four equal parts along the length direction to obtain a filter chip with a length of 25 mm. The chitosan adhering to this 25 mm long filter chip is 15 · 5 mg, triacetin is 2 · 3 mg, diacetin is 2 · 1 mg, and the specific surface area of chitosan adhering to the carrier is 3 per lg of chitosan. 2m ²

[0179] Commercially available tobacco [Peace 'Light' Box (Registered Trademark No. 2122839)] (manufactured by Japan Tobacco Inc.) cut the cellulose diacetate crimped fiber tow filter body (25mm) with force razor . Only 11 mm of a glass tube having a length of 20 mm and an inner diameter of 8 mm was inserted into the cut long piece, that is, a tobacco leaf filling piece, and these were bound with a sealing tape. Using the filter chip prepared using a chitosan triacetin dispersion as a plasticizer, a 9 mm space formed by the glass tube was plugged. Sealing tape was also applied to the connection between the glass tube and the filter to seal it. Accordingly, the filter length of the cellulose diacetate crimped fiber tow is 25 mm.

[0180] The ventilation resistance, nicotine, tar amount, and formaldehyde amount were measured for the cigarette smoke filter sample. The resulting sample has a nicotine removal rate of 5%, a tar removal rate of 2%, and a formaldehyde removal rate of 68. /. The ventilation resistance was 172mmWG.

[0181] As a reference product for evaluating the removal rate of nicotine, tar and formaldehyde These were prepared in the same manner as in the above method except that triacetin and diacetin were used as plasticizers.

[0182] The results are shown in Table 1.

[0183] [Table 1]

table 1

Claims

The scope of the claims

[I] A cigarette filter material having a polysaccharide having an amino group attached to a carrier, the carrier filter being attached with a dispersion composed of a polysaccharide having a granular amino group and a dispersion medium Material for.

[2] The tobacco filter material according to claim 1, wherein the carrier is a carrier having a tow structure, and the polysaccharide having an amino group is chitosan.

[3] The average particle size of the polysaccharide having a powdery amino group in the dispersion is 0.5 to 50 μm, and the dispersion medium is composed of a solvent having a hydroxyl group and a plasticizer for the carrier. The tobacco filter material according to claim 1 or 2, which is at least one selected.

[4] The tobacco filter material according to claim 3, wherein the solvent power having a hydroxyl group is at least one selected from water and alcohols, and the plasticizer for the carrier is a lower fatty acid ester of polyols.

[5] The tobacco filter material according to any one of claims 1 to 4, wherein the dispersion medium contains polyols as a moisturizing component.

[6] The polyol is C alkanediol, di to tetra C alkylene glycol,

2-6 2-4

And a claim consisting of at least one selected from C alkanetriol

3-10

Item 5. A tobacco filter material according to Item 5.

[7] The dispersion according to any one of claims 1 to 6, wherein the dispersion is composed at least of chitosan having an average degree of deacetylation of 70% or more and an average particle diameter:! To 20 μm, and C alkanetriol.

3-6

Tobacco filter material as described.

[8] The tobacco filter material according to any one of [1] to [7], wherein the amount of the polysaccharide having an amino group is 1 to 100 parts by weight per 100 parts by weight of the carrier.

[9] The tobacco filter material according to any one of claims 1 to 8, wherein the dispersion medium remains on the carrier.

10. The tobacco filter material according to claim 9, wherein the residual amount of the dispersion medium is 0.5 to 100 parts by weight with respect to 100 parts by weight of the carrier.

[II] The amount of the polysaccharide having an amino group is 1 to 80 parts by weight with respect to 100 parts by weight of the carrier, and the amount of the remaining dispersion medium is 5 to 100 parts by weight with respect to 100 parts by weight of the polysaccharide having an amino group. 400 parts by weight The tobacco filter material according to claim 9.

[12] The remaining dispersion medium is composed of at least a polyol as a moisturizing component.

The content of the polyol is 3 to 2 with respect to 100 parts by weight of the polysaccharide having an amino group.

10. The tobacco filter material according to claim 9, wherein the tobacco filter material is 00 parts by weight.

[13] The method for producing a material for a tobacco filter according to [1], wherein the carrier is subjected to an adhesion treatment with a dispersion composed of a granular polysaccharide having an amino group and a dispersion medium.

[14] A tobacco filter comprising the tobacco filter material according to claim 1.

[15] A method for reducing formaldehyde in tobacco smoke by constituting a tobacco filter with the tobacco filter material according to claim 1, wherein each of the retention rates of nicotine and tar is maintained at 75% or more. While reducing formaldehyde retention to 65% or less.

[16] A tobacco provided with the tobacco filter according to claim 14.