JP2844293B2 - Processing method of woven and knitted material containing acetate fiber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing an woven or knitted fabric containing acetate fibers, and more particularly, to a method for imparting a crimp to the constituent yarns of the woven or knitted fabric containing acetate fibers to give a soft and good texture. The present invention relates to a method for processing a woven or knitted fabric.

[0002]

2. Description of the Related Art In recent years, in the field of textiles for clothing, various natural,
Various modifications and improvements have been made in chemical fibers. And
Acetate fibers have also been improved in glossiness and feel by changing the fiber cross section, surface, yarn form, and the like. In particular, as a method of forming crimps in an acetate fiber yarn, a method of continuously twisting, heat setting, and untwisting using a high-speed false twist spindle and a heater is mainly employed. However, in the false twisting method, the fiber strength and the like are a limiting factor, and it is difficult to form an ultrafine crimp. As a method of expressing crimps other than the method of false twisting, JP-B-47-37205 is used.
In Japanese Patent Application Laid-Open Publication No. H10-157, a method is disclosed in which after pre-stretching, a random crimp is generated by immersing the swelling agent in an aqueous solution at an inclined angle to generate a random crimp, but a large crimp can be obtained by this method, but a very fine crimp is obtained. It is impossible to get.

[0003]

SUMMARY OF THE INVENTION The present invention provides a method for forming acetate fibers into one of the constituent yarns of a woven or knitted fabric and imparting a fine crimp to the constituent yarns in a woven or knitted state. An object of the present invention is to provide an acetate fiber-containing woven or knitted fabric having an ultrafine crimp formed on an acetate fiber yarn constituting a woven or knitted fabric and having a smooth gloss and a silky texture.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method for treating cellulose acetate fibers comprising treating a woven or knitted fabric comprising an acetate fiber yarn and another fiber yarn with an alkali compound to saponify the surface of the acetate fiber. A novel acetate fiber-containing woven or knitted fabric characterized by decomposing and removing part or all of the saponified portion by treating with a decomposing enzyme or a disinfectant, and then performing heat treatment under a moist heat at a temperature of 96 ° C. or more. In the processing method.

The woven or knitted fabric of the present invention has a degree of acetylation of 45.
〜59.5% diacetate fiber and a degree of acetylation of 59.5%.
A woven or knitted fabric composed of acetate fiber yarns selected from triacetate fibers exceeding 5% and other fiber yarns. Other fibers include synthetic fibers such as polyester fibers, polyamide fibers, and acrylic fibers. It is preferably used. In particular, in the present invention, it is preferable to use a woven fabric in which one of the warp and the weft is composed of an acetate fiber thread and the other is composed of another fiber thread. Further, the acetate fiber yarn in the woven or knitted fabric may be a yarn containing only acetate fibers or a yarn containing other fibers. The ratio of the acetate fibers in the woven or knitted fabric can be arbitrarily set in consideration of the strength of the woven or knitted fabric, the effect of imparting crimp of the acetate fibers, and the like.

In the present invention, it is necessary to treat such an acetate fiber woven or knitted fabric with an alkali compound. Examples of the alkali compound used in the alkali treatment include alkali metal hydroxides such as caustic soda, alkaline earth metal hydroxides such as calcium hydroxide, and alkali metal salts such as sodium carbonate.

The alkali treatment varies depending on the type of fiber and the degree of crimping, that is, the degree of texture required. However, the woven or knitted fabric is immersed in an aqueous solution of 1 to 40% by weight of an alkali compound, and heated at room temperature to 130 ° C. The treatment is carried out for 5 to 120 minutes to saponify at least the surface of the acetate fiber contained in the woven or knitted fabric. In addition, at the time of this alkali treatment, a known weight loss accelerator can be used in combination.

In the present invention, the alkali-treated woven or knitted fabric is treated with a cellulose-decomposing enzyme or a cellulose disinfectant to decompose and remove the cellulose produced by saponifying the surface of the acetate fiber in the woven or knitted fabric.

The cellulolytic enzyme used in the enzymatic treatment is a cellulase that hydrolyzes cellulose, and is derived from fungi such as Trichoderma and Aspergillus. Onozuka R-10 (manufactured by Yakult),
Meisserase (Meiji Seika Co., Ltd.), Cell Crust 1.5L
It can be easily obtained under a trade name such as (manufactured by Novo).

The enzymatic treatment varies depending on the degree of saponification of the acetate fiber in the alkaline treatment, the degree of the desired texture, and the like.
It is immersed in an aqueous solution of 1 to 50 g / l of cellulolytic enzyme of 5 to 7.0 and treated at 20 to 65 ° C for 2 to 240 minutes. Depending on the degree of this enzyme treatment, part or all of the saponified portion of the acetate fiber in the woven or knitted material is decomposed and removed, thereby reducing the weight. The enzyme remaining on the woven or knitted fabric can be easily deactivated by heating, such as immersion in hot water of 80 ° C. or higher.

In the case of treating with a cellulose disinfectant, the disinfectant used is preferably an acid that carbonizes and hydrolyzes cellulose, inorganic acids such as sulfuric acid and hydrochloric acid, sodium hydrogen sulfate, aluminum sulfate, and sulfuric acid. Ferric, ammonium sulfate, zinc sulfate, sulfates such as stannous sulfate, ferrous chloride, ferric chloride, aluminum chloride, magnesium chloride, zinc chloride, cobalt chloride, cuprous chloride, cupric chloride, Chloride such as nickel chloride, stannous chloride and stannic chloride; chlorates such as sodium chlorate, aluminum chlorate, potassium chlorate, sodium chlorite; nitrates such as chromium nitrate, copper nitrate and zinc nitrate Oxalates such as ferrous oxalate, ferric oxalate, stannous oxalate, acetates such as zinc acetate, phosphates such as zinc phosphate, and organic acids such as alkylnaphthalenesulfonic acid.

The disinfectant treatment depends on the type of fiber, the disinfectant, and the degree of crimping, that is, the degree of texture required.
It is immersed in a wt% aqueous solution or further heated. By this disinfectant treatment, part or all of the saponified portion of the acetate fiber in the woven or knitted material is decomposed and removed.

In general, the acids of the disinfectant also attack the acetate fibers. However, since cellulose is extremely sensitive to the action of the acids, only the cellulose in the saponified portion can be easily decomposed by controlling the concentration and temperature of the aqueous solution of the disinfectant. Can be removed.

Further, in the present invention, the woven or knitted fabric which has been treated with the cellulose degrading enzyme or the cellulose disinfectant is subjected to a heat treatment at a temperature of 96 ° C. or more under moist heat. As a heating method, steam heating, immersion in hot water, or the like is used.In order to develop crimp on the acetate fiber yarn, it is essential to heat in an atmosphere containing moisture, and in dry heat No crimps appear. 96 ° C even under moist heat
At a temperature lower than the above, crimp does not appear. In particular, in order to develop ultra-fine crimps, it is preferable to immerse in hot water of 99 ° C. or more, and it is preferable that the treatment time is 2 minutes or more.

By such heat treatment, very fine crimps are formed on the acetate fiber yarns constituting the woven or knitted fabric, and a random crimp of 5,000 / m or more is given in the fiber axis direction.

In the processing method of the present invention, an ultra-fine crimp can be formed on the acetate fiber yarn in a woven or knitted state by an alkali treatment and an enzyme treatment or a disinfectant treatment and a wet heat treatment. A woven or knitted fabric having a new texture can be obtained by the formed ultrafine crimp.

[0017]

The present invention will be described below in detail with reference to examples. (Example 1) A diacetate long fiber having a degree of acetylation of 56.9% (Bright 75
d / 21f) as the warp, and polyester filament false twisted yarn (semi-dal 75d / 36f) as the weft.
The woven fabric was woven into five satin woven fabrics of 00 strands / inch and a weft density of 83 strands / inch, scoured and dried. This woven fabric was immersed in a 9 wt% aqueous solution of caustic soda with respect to the diacetate long fiber using a jet dyeing machine, treated at 80 ° C. for 60 minutes, washed with clear water at room temperature to remove alkali, and air-dried. By this alkali treatment, a woven fabric having a diacetate long fiber reduction rate of 9.5 wt% was obtained.

Next, the alkali-treated fabric was treated with a pH value containing 5 g / l of 1.5 g of cell crust (manufactured by Novo) and 5 g / l of bioassist MT (nonionic penetrant manufactured by Moriroku).
It was immersed in an aqueous solution having a bath ratio of 4.8, 53 ° C. and a bath ratio of 1: 100 for 120 minutes, stirred, and then washed with water. Then, it was immersed in hot water of 100 ° C. for 10 minutes in a free state, and then dried. The obtained woven fabric has an ultrafine crimp of 5800 pcs / m in the fiber axis direction, a swelling smooth luster, and a silky feel to the warp composed of the diacetate filaments. Met.

(Example 2) The alkali-treated fabric obtained in Example 1 was immersed in a 5 wt% aqueous solution thereof using sodium hydrogen sulfate monohydrate (34 to 37% as sulfuric acid) as a disinfectant. After the nip, the mixture was impregnated with 90% by weight of a liquid, steamed at 130 ° C. for 10 minutes to decompose the cellulose in the saponified portion, stirred in water to remove the decomposed product, washed with water, and dried. Next, it was immersed in hot water of 100 ° C. for 10 minutes in a free state, and then dried. The resulting fabric is
The warp composed of the diacetate filaments has a length of 6 in the fiber axis direction.
It had an ultrafine crimp of 200 pieces / m, had a swelling smooth luster, and had a silky feel.

[0020]

According to the present invention, the acetate fiber and the other fibers are combined to improve the functionality, the design, or the texture, and the acetate fiber yarn constituting the woven or knitted fabric is formed into a very fine crimp. By forming, a woven or knitted material having a swelling smooth luster and a silky feel can be obtained, and also a woven or knitted material having excellent coloring properties of acetate fibers can be obtained.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiromi Hosunaga 4-160 Sunadabashi, Higashi-ku, Nagoya-shi, Aichi Mitsubishi Rayon Co., Ltd. Product Development Laboratory (56) References JP-A-2-216282 (JP, A) JP-A-3-51376 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D06M 11/00-16/00

Claims (3)

(57) [Claims] A woven or knitted fabric composed of an acetate fiber yarn and another fiber yarn is treated with an alkali compound to saponify the surface of the contained acetate fiber and then treated with a cellulose decomposing enzyme or a disinfectant. A method for processing an acetate fiber-containing woven or knitted fabric, which comprises decomposing and removing part or all of the saponified portion, and then subjecting the saponified portion to heat treatment at a temperature of 96 ° C. or more under moist heat. 2. The method for processing a woven or knitted fabric containing acetate fibers according to claim 1, wherein the heat treatment is performed under moist heat at a temperature of 99 ° C. or higher. 3. The acetate-fiber-containing woven or knitted fabric according to claim 1, wherein one of the warp and the weft is constituted by an acetate fiber yarn and the other is constituted by another fiber yarn. Processing method.