JPH0967766A - Treatment of cellulosic fiber-containing woven or knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cellulosic fiber fabric having deep and excellent gloss and flexibility as well as high strength by subjecting a system containing a cellulosic fiber to mercerization treatment and then treatment with liquid ammonia, weaving or knitting the treated fiber and then re-treating the resultant woven or knitted fabric with liquid ammonia. SOLUTION: A yarn containing at least 20% cellulosic fiber is subjected to mercerization treatment in 10-25wt.% aqueous solution of caustic soda under tension and succesively subjected to liquid ammonia treatment. The treated fiber is woven or knitted and the resultant fabric is retreated with liquid ammonia.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention has a deep and excellent luster never obtained by known methods,
The present invention relates to a soft and high-strength cellulosic fiber-containing woven or knitted fabric.

[0002]

2. Description of the Related Art A mercerizing treatment using caustic soda is widely practiced as a method for imparting gloss to a cellulosic fiber-containing woven or knitted fabric.

As a method for further increasing the gloss, there is a method (Japanese Patent Publication No. 56-13826) in which mercerization is performed at the yarn stage, the yarn is formed into a woven or knitted product, and then the mercerization is performed again.

When the mercerization treatment is carried out at the yarn stage, the gloss and the strength are remarkably improved, but the unevenness of the dye due to the variation in the mercerization (that is, the difference in the dyeability between the yarns due to factors such as tension and temperature) results. The resulting stains) occur.

Further, when the mercerization treatment is carried out again after that, although the dyed spots are eliminated, the deep and excellent gloss as in the present invention cannot be obtained.

Next, as a method of obtaining luster other than the mercerizing treatment, there is a method of treating the yarn and the woven / knitted fabric with liquid ammonia (Japanese Patent Publication No. 45-13826).

Further, a method of mercerizing with yarn, knitting on a knitted fabric, and then treating with liquid ammonia (Japanese Patent Laid-Open No. 5-2307).
42) is also available. All of the above methods can obtain the same gloss as that obtained by the mercerization treatment, but cannot obtain the deep and excellent gloss as in the present invention.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a treatment method for solving the above-mentioned drawbacks and obtaining a woven or knitted fabric having excellent gloss.

[0009]

In order to solve the above-mentioned problems, according to the present invention, a cellulosic yarn is subjected to mercerization treatment, then liquid ammonia treatment, and after the yarn is formed into a woven or knitted fabric. The method for producing a cotton-containing woven or knitted fabric is characterized in that the liquid ammonia treatment is performed again.

The term "cellulosic fiber" as used herein means cotton,
It refers to fibers such as hemp, rayon, and acetate, and also includes composite materials such as mixed spinning of these fibers and synthetic fibers or protein fibers such as wool and silk, intertwisting, and interweaving.

In this case, it is desirable that at least 20% or more of the cellulosic fiber is contained.

As the mercerizing agent of the present invention, caustic soda, caustic potash and the like can be used, but caustic soda is used here.

When the yarn is mercerized, the treatment concentration is 10 to 10.
After dipping treatment under the conditions of 25%, treatment temperature: 10 to 50 ° C., treatment time: 1 to 3 minutes, a water washing treatment is performed.

Here, when mercerizing, the yarn is processed under tension. Under tension means that the caustic soda treatment is carried out under tension, not under tension.

The mercerized yarn is then treated with liquid ammonia under tension. The processing conditions are the processing temperature: -3
The treatment time is 4 ° C. or less and the treatment time is 3 to 45 seconds. Then, the ammonia is removed by evaporation by heating.

A woven or knitted fabric is made using the yarn treated with the liquid ammonia, and again treated with the liquid ammonia under the same conditions as the yarn.

By this second ammonia treatment, every part of the woven or knitted fabric is made uniform in the warp and weft directions of the fiber, and the twist of the fiber and the yarn is released and the distortion inherent in the woven and knitted fabric is eliminated.

As a result, the dyeability is maximized, the dyeing is performed uniformly without spots, and uniform reflection is obtained.

As a result, it is possible to obtain an extremely deep and excellent gloss which has not been obtained by the conventional method.
The present invention not only improves gloss, but also improves deep dyeing property and tenacity.

[0020]

EXAMPLE A cotton yarn of No. 60 twin yarn was subjected to mercerization treatment, subsequently subjected to liquid ammonia treatment, and a knitted fabric produced by using a 30-inch 28-gauge knitting machine was subjected to liquid ammonia treatment again.

[0021]

[Comparative example]

Comparative example: A cotton yarn of No. 60 double yarn was mercerized and prepared under the same conditions as in the example.

Comparative Example: A mercerized product prepared in Comparative Example.

Comparative Example: A cotton yarn of No. 60 double yarn was mercerized and subsequently treated with liquid ammonia, which was prepared under the same conditions as in the examples.

Comparative Example: A cotton thread of No. 60 double thread was mercerized and prepared under the same conditions as in the Example, and then treated with liquid ammonia.

Comparative Example: A cotton thread of No. 60 double thread was treated with liquid ammonia and prepared under the same conditions as in the Example.

COMPARATIVE EXAMPLE: Liquid ammonia treatment of the prepared comparative example.

Comparative Example: A sample prepared under the same conditions as those of the example and treated with liquid ammonia.

The above treated products were tested and shown in Tables 1 and 2.

[0029]

[Table 1]

[0030]

[Table 2]

* 1: Dyeing evaluation method A cotton knitted fabric was treated with a reactive dye (vinyl sulfone type) 2.3% o. w. f, exhaust dyeing was carried out at 90 ° C. using a jet dyeing machine in a dyeing bath of 20 g / l of soda ash and 80 g / l of Glauber's salt, and the gloss and dyeability of the knitted fabric were visually judged. Gloss and dyeability ◎: Good, ×: Poor * 2: Glyoxal-based fiber finishing agent 8 for dyed knitted fabric
%, Metal catalyst 3%, silicon softener 3%, nonion softener 3%, formalin catcher 2%, and a processing liquid of 70% was added to make a pickup, and then 1
After drying at 30 ° C. for 3 minutes, curing was performed for 160 × 90 seconds. Bursting strength: JIS L 1018 method Hand feeling: Judged by handling after washing according to JIS L 217 103 method. ⊚: Soft x: Hard * 3: Barium activity number JIS L-1096 method (the larger the value, the better the swelling degree)

As shown in the above table, the knitted fabric of the present invention has an excellent level of luster that cannot be obtained by any other method, and also has improved level dyeability, improved deep dyeing effect and tenacity. Almost no change in texture afterward was observed.

With regard to the woven fabric, it is possible to obtain the same excellent effects as those in the above-mentioned embodiment.

[0034]

Industrial Applicability By the above-mentioned steps, a cotton fiber knitted product having an excellent gloss and a deep dyeing property, which has never been obtained by the known method, can be obtained.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kiyoshi Ikeda Kiyoshi 45, Miai-cho, Okazaki-shi, Aichi Nisshinbo Co., Ltd.Miai factory (72) Inventor Kazuhiko Harada 45, Miai-cho, Okazaki, Aichi Nisshinbo In the company of Miai factory

Claims (1)

[Claims] 1. A yarn containing a cellulosic fiber is used for 10 to 2
It is treated with a 5% by weight aqueous solution of caustic soda under tension (hereinafter referred to as mercerization treatment), followed by treatment with a liquid ammonia solution, and a woven or knitted fabric is produced using this yarn. A method for treating a woven or knitted fabric, which comprises treating with an aqueous solution.