JPH1053977A - Dyeing of deodorant fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dye a deodorant fiber without deteriorating deodorizing performances by dyeing a deodorant fiber containing a fiber, having photocatalytic activities against an odorous component and mixed with a fiber containing a compound having amino groups and then treating the resultant dyed fiber with an alkali. SOLUTION: A deodorant fiber containing (A) a fiber, having photocatalytic activities against an odorous component in air such as a tobacco odor and mixed with (B) a fiber containing a compound having amino groups such as polyethyleneimine or polyallylamine (a composite spun yarn, a combined filament fiber, etc.) is dyed and then treated with an alkali. Even when amino groups are blocked with acetic acid, etc., at the time of dyeing, the amino groups are liberated by the treatment with the alkali.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dyeing deodorant fibers, and more particularly, to a method for mixing fibers having photocatalytic activity against odorous components in the air and fibers containing a compound having an amino group. The present invention relates to a method for dyeing deodorant fibers that can be dyed without deteriorating the deodorizing performance of odor fibers.

[0002]

2. Description of the Related Art In recent years, interest in comfort in a living environment has been increasing, and various proposals have been made regarding removal of offensive odors existing in a room, in a refrigerator, in a company, or in various environments. Above all, the deodorization of tobacco odor in offices, homes, and automobiles has been highlighted as the smoking cessation campaign has spread, and products using various deodorant fibers have been proposed. However, when dyeing a deodorant cationic dyeable fiber containing a compound having an amino group, for example, an acrylic fiber with a cationic dye, the amino group is blocked by an acid such as acetic acid used for pH adjustment. However, there is a problem that the deodorizing performance is significantly impaired, and the product development is restricted.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a method for dyeing deodorant fibers which can be dyed without deteriorating the deodorizing performance of the deodorant fibers. .

[0004]

The invention claimed in the present invention is as follows. (1) A deodorizing fiber obtained by dyeing a deodorizing fiber in which a fiber having photocatalytic activity with respect to odorous components in the air and a fiber containing a compound having an amino group are mixed, and then treating the fiber with an alkali. Dyeing method.

According to the dyeing method of the present invention, when dyeing deodorant fibers, even if amino groups contained in the fibers are blocked by an acid such as acetic acid at the time of pH adjustment, the amino groups blocked by the subsequent alkali treatment are removed. Since the group is released again, the deodorant fiber can be dyed without deteriorating the deodorant performance. The fiber to which the dyeing method of the present invention is applied is a deodorant fiber in which a fiber having photocatalytic activity for odorous components in the air and a fiber containing a compound having an amino group are mixed. It can also be applied to woven or knitted fabrics obtained using fibers. As a method of mixing a fiber having a photocatalytic activity with respect to an odorous component in the air and a fiber containing a compound having an amino group, a conventionally well-known method and conditions can be appropriately selected and performed. In the Article, there are methods of compound spinning, blending and twisting of both, and in woven fabrics, one is used for the warp and the other is used for the weft, or the two are alternately used for the warp and / or weft alternately. In the case of a knitted fabric, a method in which both are supplied separately or in a uniform manner, a method in which the both are supplied to a front, a middle, and a back and / or separately supplied, are included.

[0006] Fibers having photocatalytic activity against odorous components in the air used for deodorizing fibers can be obtained by introducing particles having photocatalytic activity into the fibers. Here, the photocatalytic activity refers to the action of developing a catalytic action by light irradiation and decomposing odorous components in the air by a chemical reaction such as an oxidation reaction.For example, holes are generated in the catalyst by light irradiation and active oxygen Means that odorous components in the air are decomposed by an oxidation reaction or the like due to generation of odor. The particle having photocatalytic activity is not particularly limited as long as it has such an effect, and for example, titanium oxide, zinc oxide, and the like are used. Among these, titanium oxide is preferable because of its strong oxidizing power, and among them, anatase-type titanium oxide having high photocatalytic action is particularly preferable. The activity can also be improved by doping titanium oxide or the like with a metal such as palladium or copper.

As a method for adhering the particles having photocatalytic activity to the fiber, a method in which the particles are kneaded into a spinning solution of the fiber and spun, and a photocatalytic sol is applied in a gel-swelled state by a dip nip method during wet spinning In order to sufficiently exert the action of the photocatalyst, the latter method capable of adhering photocatalyst particles to the fiber surface is effective. The content of the particles having photocatalytic activity with respect to the fiber is not particularly limited.
10 to 10% by weight, preferably 0.3 to 5% by weight. When the content of titanium oxide is less than 0.1% by weight, the decomposition performance of the organic substance, particularly a compound containing a carbonyl group or an acidic compound, due to the catalytic action against malodor is low. This makes it difficult to contain them, and also causes problems such as a reduction in fiber physical properties, a reduction in hand, a wrapping of fibers in a subsequent step, for example, a spinning step, and abrasion of a spinning machine. The size of titanium oxide is
There is no particular limitation as long as the production of the fiber is not hindered, but it is preferably 0.07 μm or less from the viewpoint of easy adhesion of particles. The particle size of the titanium oxide can be measured by measuring the particle size of the titanium oxide present in the dispersion using a laser diffraction scattering type particle size distribution analyzer (LA-910W, manufactured by Horiba, Ltd.).

In order to sufficiently obtain the deodorizing effect of the fiber having photocatalytic activity, the acetaldehyde deodorizing rate upon light irradiation is preferably 80% or more, more preferably 90%.
% Or more. The fibers to which the particles having photocatalytic activity are attached are not particularly limited, but synthetic fibers having a small strength decrease due to self-deterioration due to photocatalytic activity, particularly synthesis by wet spinning which can provide particles having photocatalytic activity in a gel-swelled state. Fibers, for example, polyacrylonitrile-based synthetic fibers are preferred.

The fibers containing a compound having an amino group used in deodorizing fibers have a deodorizing function for one or more odorous components, especially for tobacco components. Such fibers include, for example, tobacco deodorant fibers containing a compound having an amino group in the fibers, and tobacco deodorants produced by applying a compound having an amino group in a polymer stage or a raw yarn / raw cotton production stage. Fibers, a deodorant fiber proposed in JP-A-8-74177, which is effective against malodor of compounds having a malodorous carbonyl group, for example, acetaldehyde and acidic compounds, is proposed in JP-A-8-74131. In particular, deodorant fibers effective for deodorizing tobacco can be mentioned. Examples of the compound having an amino group include sulfanilic acid and aminosilicate, and compounds having an amino group having two or more functional groups, such as hydroxyamine sulfate, ethylenediamine, and diaminopropylamine, are preferably used. Particularly preferably, a polymer compound having an amino group having two or more functional groups,
For example, polyethyleneimine, polyallylamine, amine-modified acrylic polymer, chitosan, polyvinylamine, and the like.

For example, the deodorant fiber proposed in the above-mentioned Japanese Patent Application Laid-Open No. H8-74177 has an acidic group of 0.01-0.1 per fiber.
Amino groups in the fiber containing 5 mol / kg are 0.03-
10 mol / kg wet-heat bonded. Examples of the fiber containing an acidic group include acrylic synthetic fibers, modacrylic synthetic fibers, and cationic dyeable cellulose fibers having an acidic group such as a carboxyl group or a sulfonic acid group. In addition, in the production stage of acrylic synthetic fibers or modacrylic synthetic fibers, a compound having an amino group may be attached to the undried yarn, and then subjected to a wet heat treatment to bond the amino group with a wet heat. The content of the acidic group and the amino group is in the above range from the viewpoints of deodorant properties, handleability, fiber production, and the like.

In the present invention, the deodorizing fiber is subjected to an alkali treatment after dyeing. The dye used for dyeing the deodorant fiber is not particularly limited, and a general dye such as a cationic dye can be used. The method of dyeing the deodorant fiber is not particularly limited, but is usually pH 3.5 to 3.5 with an acid or the like.
The pH is adjusted to 4.5. As the acid in this case,
For example, in addition to organic acids such as acetic acid, citric acid, and formic acid, inorganic acids such as phosphoric acid, hydrochloric acid, nitric acid, and sulfuric acid can be used. In addition, in order to have a buffering effect at the time of staining, a salt of each acid can be mixed.

For the alkali treatment after dyeing of the deodorant fiber, an aqueous solution of ammonia, an alkali metal hydroxide, an alkaline earth metal hydroxide or the like can be used. The concentration of the chemical used in these alkali treatments is 0.1% to 10%.
owf is preferable, more preferably 1% to 5% o.
wf. If the concentration of the drug is less than 0.1% owf, the deodorizing property may be reduced, and if it exceeds 10% owf, the mechanical properties of the deodorized fiber are reduced, and the fiber cannot be used as a normal fiber product. Sometimes. As a method of alkali treatment, a method of alkali treatment in the same tank after dyeing, a method of alkali treatment after dyeing a yarn or the like, a method of alkali treatment after spinning, knitting and the like, or a fabric was used. A method of performing an alkali treatment at a stage or after sewing is included. The alkali treatment can be performed, for example, by immersing in an aqueous alkali solution, adjusting the content to a desired content by centrifugal dehydration, mangle, or the like, or applying the composition by spraying or the like, and then leaving it to stand. The temperature at the time of the treatment is not particularly limited, but is preferably in the range of room temperature to 60 ° C, more preferably in the range of 40 to 60 ° C.

The deodorant fibers dyed by the dyeing method of the present invention are used for interiors such as curtains, cushions, carpets, upholstery, partitions, wallpapers, seat covers, dolls, stuffed animals, goodwill fabrics, flowering plants with pots and the like. , Car seats, linings, car interior covers, car seat covers, etc., clothing such as sweaters, jerseys, interlinings, blankets, masks, clothes covers, night caps, pot covers, futon storage bags, packaging materials, etc. It can be used for various purposes.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

EXAMPLES The present invention will be described more specifically with reference to the following examples. In addition,% in the examples means% by weight unless otherwise indicated, and the deodorizing performance was measured by the following method. (1) Deodorizing performance A 1 g sample together with a malodorous component was placed in a Tedlar bag having a capacity of 1000 ml, and the residual gas concentration after 60 minutes was measured with a Kitagawa gas detector tube. As an odor component, 100
600 ml of acetic acid at a concentration of ppm were used. For generation of offensive odor, a standard gas generator (manufactured by Gastech) was used.

Example 1 When wet spinning a polyacrylonitrile-based synthetic fiber, 1% of a titanium oxide sol (STS-01 manufactured by Ishihara Sangyo Co., Ltd.) as a photocatalytic sol was applied in a gel-swelled state by a dip nip method, and dried, followed by drying. An active fiber was obtained. The polyacrylonitrile-based synthetic fiber was immersed in an aqueous solution of polyvinylamine having a degree of polymerization of 1630 to obtain a polyacrylonitrile-based fiber containing 1% of polyvinylamine in the fiber. 50% of the obtained two types of acrylonitrile fibers
The blended yarn was blended at a ratio of / 50% to obtain a spun yarn of No. 18 single yarn.
The deodorizing performance of this product satisfied the deodorizing performance at a residual gas concentration of 0 ppm. The spun yarn is treated with a cationic dye (Aizen Catilon Blue, manufactured by Hodogaya Chemical Co., Ltd.) 1
% And dyed in a bath adjusted to pH 4 with acetic acid. The bath ratio was 1:40 and the dyeing was boiling for 30 minutes. When the deodorizing performance of the obtained dyed product was examined, the residual gas concentration was 100 p.
pm and the deodorizing performance had disappeared. Next, the dyed product was washed with water, immersed in an aqueous ammonia solution (1%) for 20 minutes, and dried. The deodorant performance of the obtained processed product was satisfactory at a residual gas concentration of 0 ppm.

Comparative Example 1 A spun yarn was dyed in the same manner as in Example 1 except that the spun yarn was treated with an aqueous ammonia solution and then dyed. The deodorant performance of the dyed product had a residual gas concentration of 100 ppm and the deodorant performance had disappeared.

Example 2 Dyeing was carried out in the same manner as in Example 1 except that an aqueous solution of sodium hydroxide (1%) was used instead of the aqueous ammonia solution, followed by alkali treatment. The deodorant performance of the obtained processed product was satisfactory at a residual gas concentration of 0 ppm.

[0018]

According to the dyeing method of the present invention, a deodorizing fiber obtained by mixing a fiber having photocatalytic activity against odorous components in the air and a fiber containing a compound having an amino group has a deodorizing performance. It can be dyed without loss.

Claims (1)

[Claims] 1. A deodorizing fiber comprising a mixture of a fiber having photocatalytic activity against odorous components in the air and a fiber containing a compound having an amino group, and then dyeing the mixed fiber, followed by alkali treatment. How to dye odor fibers.