JPH06330469A - Production of novel conjugate yarn containing acetate fiber - Google Patents

Abstract

PURPOSE:To provide a novel conjugate yarn, containing acetate fiber and having soft and favorabe hand and drape while maintaining 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 decompose or remove a part or all of the saponified part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a novel acetate fiber-containing composite yarn.

[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. Although it is possible to reduce the amount by saponifying, the surface of the fiber is made cellulose and loses acetate, and unlike cellulose fibers, the hydroxyl group of β-glucose is replaced with an acetyl group, so the enzyme of cellulose cannot reduce the amount of decomposition. It is possible. 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 is facilitated, but also a new effect is obtained in combination with the effect of the combination. Can be expressed. The present invention, while maintaining the characteristics of acetate fiber,
It is an object to obtain a novel acetate fiber-containing composite yarn which is soft and has a good texture.

[0005]

According to the present invention, the surface of an acetate fiber is treated by treating a composite yarn composed of an acetate fiber and another fiber with an alkali compound to saponify the surface, and then a cellulose-decomposing enzyme or erosion is performed. A method for producing a novel acetate fiber-containing composite yarn, which comprises treating with a chemical agent to decompose and remove a part or all of the saponified portion.

The composite yarn in the present invention has an acetylation degree of 45.
~ 59.5% diacetate fiber and a degree of acetylation of 59.
A composite yarn made by blending, blending, or twisting acetate fibers selected from 5% or more of triacetate fibers with other fibers. Other fibers include synthetic fibers such as polyester fibers, polyamide fibers, and acrylic fibers. It is preferably used. Further, the ratio of the acetate fibers in the composite yarn 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 composite yarn 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 kind of the 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 composite yarn.
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 composite yarn. 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 composite yarn 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 composite yarn.

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 fiber by the alkali treatment and the desired texture, and the like. Cellulose degrading enzyme having a pH of 3.5 to 7.0 prepared by adjusting the alkali-treated composite yarn 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, part or all of the saponified portion of the acetate fiber in the composite yarn is decomposed and removed to reduce the weight. The enzyme remaining on the composite yarn can be easily inactivated by heating it by immersing it in hot water at 80 ° C. or higher.

Further, as the cellulose etchant used for treating the etchant, acids which carbonize and hydrolyze cellulose are preferable, and inorganic acids such as sulfuric acid and hydrochloric acid, sodium hydrogen sulfate, aluminum sulfate, ferric sulfate, Sulfates such as ammonium sulfate, zinc sulfate, stannous sulfate, ferrous chloride, ferric chloride, aluminum chloride, magnesium chloride, zinc chloride, cobalt chloride, cuprous chloride, cupric chloride, nickel chloride, chloride Chlorides such as stannous tin and stannic chloride, chlorates such as aluminum chlorate, potassium chlorate and sodium chlorite, nitrates such as chromium nitrate, copper nitrate and zinc nitrate, ferrous oxalate , Oxalates such as ferric oxalate and stannous oxalate, acetates such as zinc acetate, phosphates such as zinc phosphate, and organic acids such as alkylnaphthalenesulfonic acid.

The treatment of the degreasing agent depends on the type of the fiber, the type of the degreasing agent, and the degree of modification, that is, the desired texture.
Immerse in a t% aqueous solution or further heat. By the treatment with the discharging agent, a part or all of the saponified portion of the acetate fiber in the composite yarn 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 composite yarn can be obtained by modifying the surface layer portion of the acetate fiber contained in the composite yarn by the alkali treatment and the enzyme treatment or the treating agent treatment.

[0016]

EXAMPLES The present invention will be specifically described below with reference to examples. (Example 1) A 1800 t / m twist yarn of triacetate long fibers (Bright 45d / 34f) and polyester long fibers (Semidal 30d / 12f) having an acetylation degree of 61.5% was used, and the warp yarns and the weft yarns were formed using these twist yarns. The satin-finished fabric (100 warp density / inch, weft density 75 threads / inch) having the above composition was scoured and then dried. This woven fabric is immersed in a 12 wt% aqueous solution of caustic soda for triacetate long fibers, and the resulting fabric is dried at 110 ° C.
After treatment for minutes, wash with clean water at room temperature to remove alkali,
Air dried. By this alkali treatment, a woven fabric having a triacetate long fiber weight loss rate of 11.5 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 obtained woven fabric is 9.5 wt in total.
%, Moderate tension due to the constituent threads of the fabric,
It had a soft texture of waist and silk.

(Example 2) The alkali-treated fabric obtained in Example 1 was dipped in a 7 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 woven fabric is 10.8 wt.
%, Moderate tension due to the constituent threads of the fabric,
It had a soft texture of waist and silk.

[0019]

EFFECTS OF THE INVENTION According to the present invention, the acetate fiber contained in the composite yarn is treated with an alkali and an enzyme treatment or a caustic agent, as well as the functionality and texture are improved by combining the acetate fiber with another fiber. It has a new texture, moderate tension, waist and silky softness to the fabric,
Moreover, a composite yarn having the excellent coloring property of acetate fiber can be obtained. In addition, it is possible to obtain a completely new composite yarn which has never existed in the past, by being combined with the influence of the above-mentioned treatment of other fibers to be combined with the acetate fiber.

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Claims (1)

[Claims] 1. A composite yarn comprising 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 process for producing a novel acetate fiber-containing composite yarn, which comprises decomposing and removing a part or all of a part.