JPH06330470A - Production of novel woven or knitted fabric containing acetate fiber - Google Patents

Abstract

PURPOSE:To provide a novel woven or a knitted fabric, containing acetate fiber and having soft and smooth gloss and nice hand and drape while maintaining the essential characteristics of the acetate fiber. CONSTITUTION:Conjugate yarn composed of acetate fiber and other fibers is treated with an alkaline compound to saponify the surface of the contained acetate fiber. The resultant yarn is then treated with a cellulolytic enzyme or an etching agent to decomopose or remove a part or all of the sponified part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel method for producing a woven or knitted fabric containing acetate fibers which is soft and has a good texture.

[0002]

2. Description of the Related Art In recent years, in the field of textiles for clothing, various natural and
Various modifications and improvements have been made on chemical fibers. With respect to acetate fibers, the glossiness and texture have been improved by changing the fiber cross section, surface, thread form, and the like.

There is also an attempt to subject the acetate fiber to an alkali treatment or an enzyme treatment in the same manner as the alkali treatment of cellulose fiber or the enzyme treatment proposed in Japanese Patent Publication No. 52-48236. It is possible to reduce the amount by saponification, but the surface of the fiber becomes cellulose and loses acetate, and unlike cellulose fibers, the hydroxyl group of β-glucose is replaced with an acetyl group, so it is not possible to reduce the amount by decomposition with the enzyme of cellulose. Is. Further, it is also known that the acetate fiber is printed with a paste solution containing a discharging agent and then heat-treated, but this is not suitable for modification because it decomposes and removes the acetate fiber itself. is there.

[0004]

However, if the acetate fiber is combined with another fiber and combined with a specific treatment, not only the modification of the acetate fiber itself is facilitated, but also a new effect is obtained in combination with the effect of the combination. The effect can be expressed. It is an object of the present invention to obtain a novel acetate fiber-containing woven or knitted fabric having a soft and smooth luster and a good texture while maintaining the properties of the acetate fiber.

[0005]

According to the present invention, a woven or knitted material composed of acetate fibers and other fibers is treated with an alkali compound to saponify the surface of the contained acetate fibers, and then the cellulose degrading enzyme or erosion is performed. A novel method for producing a woven or knitted fabric containing acetate fiber is characterized in that a part or all of the saponified portion is decomposed and removed by treating with a chemical agent.

The woven or knitted fabric in the present invention has a degree of acetylation of 45.
~ 59.5% diacetate fiber and a degree of acetylation of 59.
This refers to a woven or knitted material by any compounding means composed of acetate fibers selected from triacetate fibers exceeding 5% and other fibers. As the other fibers, synthetic fibers such as polyester fibers, polyamide fibers and acrylic fibers are preferably used. To be In particular, in the present invention, it is preferable to use a woven fabric in which one of the warp yarn and the weft yarn is made of acetate fiber and the other is made of other fiber. Further, the ratio of the acetate fibers in the woven or knitted fabric can be arbitrarily set in consideration of the yarn strength and the effect of modifying the acetate fibers.

In the present invention, it is necessary to treat the woven or knitted fabric containing the acetate fiber 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, the degree of modification, that is, the desired texture, etc., but the alkali compound is 1 to 40 wt% with respect to the acetate fiber containing the woven or knitted fabric.
5-12 under heating at room temperature to 130 ° C.
It is treated for 0 minutes to saponify at least the fiber surface of the acetate fiber contained in the woven or knitted fabric. In addition, it is possible to use a weight loss promoter such as a cationic activator together with the alkali treatment.

Next, in the present invention, the alkali-treated woven or knitted material is treated with a cellulolytic enzyme or a cellulosic agent to decompose and remove the cellulose produced by saponification of the surface of the acetate fiber in the woven or knitted material.

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

The enzyme treatment varies depending on the degree of saponification of the acetate fibers by the alkali treatment, the desired texture, etc., but the cellulose-degrading enzyme having a pH of 3.5 to 7.0 is prepared by adjusting the alkali-treated woven or knit fabric with acetic acid or the like. 1-50g /
It is immersed in an aqueous solution of 1 and treated at 20 to 65 ° C. for 2 to 240 minutes. Depending on the degree of this enzymatic treatment, a part or all of the saponified portion of the acetate fiber in the woven or knitted material is decomposed and removed to reduce the weight. The enzyme remaining on the woven or knitted fabric can be easily inactivated by heating it by immersing it in hot water at 80 ° C. or higher.

Further, in the case of treating with a cellulose discharge agent,
As the discharging agent used, acids that carbonize and hydrolyze cellulose are preferable, and inorganic acids such as sulfuric acid and hydrochloric acid, sodium hydrogen sulfate, aluminum sulfate, ferric sulfate, ammonium sulfate, zinc sulfate, stannous sulfate and the like are used. Chloride such as sulfate, ferrous chloride, ferric chloride, aluminum chloride, magnesium chloride, zinc chloride, cobalt chloride, cuprous chloride, cupric chloride, nickel chloride, stannous chloride, stannic chloride Substances, chlorates such as sodium chlorate, aluminum chlorate, potassium chlorate, sodium chlorite, etc., nitrates such as chromium nitrate, copper nitrate, zinc nitrate, ferrous oxalate, ferric oxalate, stannous oxalate. And oxalates, acetates such as zinc acetate, phosphates such as zinc phosphate, and organic acids such as alkylnaphthalenesulfonic acid.

The treatment of the caustic agent depends on the type of the fiber, the type of the caustic agent, and the degree of modification, that is, the desired texture.
Immerse in a t% aqueous solution or further heat. By this treatment with a discharging agent, a part or all of the saponified portion of the acetate fiber in the woven or knitted material is decomposed and removed to reduce the weight.

In general, the acid of the etchant also corrodes the acetate fiber, but since cellulose is extremely sensitive to the action of the acid, only the cellulose in the saponification part is easily decomposed by controlling the concentration and temperature of the aqueous solution of the etchant. Can be removed.

In the present invention, a novel woven or knitted product can be obtained by modifying the surface layer portion of the acetate fiber contained in the woven or knitted product by the alkali treatment and the enzyme treatment or the etching agent treatment. In particular, in the present invention, by using a woven fabric in which one of the warp yarn and the weft yarn is made of acetate fiber and the other is made of other fiber, it is possible to obtain a woven fabric which is rich in design and has a novel texture.

[0016]

EXAMPLES The present invention will be specifically described below with reference to examples. Example 1 Diacetate long fibers (bright 75d / 21f) having an acetylation degree of 56.9% were used as warp yarns, and false twisted yarns of polyester long fibers (semi-dull 75d / 36f) were used as weft yarns. / Inch and weft density was 83 pieces / inch, and 5 sheets of satin woven fabric were woven, scoured and dried. Using a jet dyeing machine, this fabric is used for 9 wt% of diacetate filaments.
% Aqueous sodium hydroxide solution, treated at 80 ° C. for 60 minutes, washed with fresh water at room temperature to remove alkali, and air dried.
By this alkali treatment, a woven fabric having a weight loss rate of 9.5 wt% was obtained.

Next, the alkali-treated woven fabric was added with a cell crust of 1.5 L (manufactured by Novo Co., 5 g / l) and Bio Assist MT (Moriroku Co., Ltd. nonionic penetrant) of 5 g / l, a pH.
It was immersed in an aqueous solution having a bath ratio of 1: 100 at 4.8, 53 ° C for 120 minutes, stirred, washed with water, immersed in hot water at 80 ° C for 15 minutes, and then dried. The resulting fabric had a 10.8 wt% weight loss, had a soft, smooth sheen, and had a silky feel.

(Example 2) The alkali-treated fabric obtained in Example 1 was dipped in a 5 wt% aqueous solution of sodium hydrogensulfate monohydrate (34-37% as sulfuric acid) as an etchant. After nipping to impregnate 90 wt% of the liquid amount, the mixture was steamed at 130 ° C. for 10 minutes to decompose the cellulose in the saponified portion, stirred in water to remove the decomposed product, removed, washed with water, and dried. The resulting fabric had a 13.3 wt% weight loss, had a soft, smooth sheen, and had a silky feel.

[0019]

EFFECTS OF THE INVENTION According to the present invention, a new texture is obtained by treating the acetate fiber contained in the woven or knitted material with an enzyme or with a discharging agent, as well as improving the functionality and texture by compounding the acetate fiber with another fiber. It is possible to give a woven or knitted fabric having a soft and smooth luster and a silky feel, and also a woven or knitted fabric having an excellent coloring property of acetate fibers. Also combined with the effects of the above treatment of other fibers that are composited with acetate fibers,
It is possible to obtain a woven or knitted fabric having a completely new texture which has never been obtained.

Claims (2)

[Claims] 1. A woven or knitted fabric composed of acetate fibers and other fibers is treated with an alkali compound to saponify the surface of the contained acetate fibers, and then treated with a cellulose degrading enzyme or a caustic agent to perform the saponification. A novel method for producing a woven or knitted fabric containing acetate fiber, which comprises decomposing and removing a part or all of a part. 2. The method for producing a novel acetate fiber-containing woven or knitted fabric according to claim 1, wherein a woven or knitted fabric is used in which one of the warp yarn and the weft yarn is made of acetate fiber and the other is made of other fiber.