JP2501545B2 - Method for improving texture of cellulose fiber fabric - 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 improving the feel of a cellulosic fiber cloth, and more specifically, it is soft and excellent in drape and repulsion without deteriorating the surface and strength characteristics of the cellulosic fiber cloth. The present invention relates to a texture improving method capable of imparting a silky texture.

[0002]

2. Description of the Related Art A number of mechanical processing techniques for improving the texture of cellulosic fiber cloth have been conventionally known in the fiber processing industry, and some of them are currently commercially practiced. For example, Japanese Patent Publication 42-13419
And a positively rotating thermal cylinder as seen in the publication
A method using a compression and contraction device (so-called sanforize machine) of the type consisting of an endless rubber belt that rotates in pressure contact with its outer periphery, JP-A-62-69878 and JP-A-62-1.
No. 70794, a method of sequentially exposing the front and back of the fabric to a mechanical impact by impact means, or, as seen in JP-A-48-67559, the fabric is poured into a narrow passage together with hot water. , There is a method of swinging the cloth on a mesh.

[0003]

However, currently known mechanical treatment techniques for cellulosic fiber fabrics are as follows.
The effect to be achieved is not so valuable as to be added with an additional processing step, and on the contrary, the effect is too intense to damage other functions such as fiber surface damage and fabric strength. There are also techniques such as weakening. Furthermore, it is not possible to obtain a silky texture that is soft and excellent in drape property and repulsion property only by these mechanical treatment techniques.

The present invention has been made in view of the above problems, and is soft and drapeable on a fabric without deteriorating the surface and strength characteristics of the cellulosic fiber fabric.
It is an object of the present invention to provide a texture improving method capable of imparting a silky texture excellent in repulsion.

[0005]

Means for Solving the Problems The above-mentioned object is to subject a cellulosic fiber cloth to a cellulase enzyme treatment, introduce the enzyme-treated cloth into a Venturi tube, and convey the cloth by compressed air, continuously. This can be achieved by a method for improving the texture of a cellulosic fiber cloth, which comprises hitting and crushing wire mesh.

The present invention will be described in detail below.

The cloth referred to in the present invention means a woven fabric, a knitted fabric, a non-woven fabric and the like, and the cellulosic fiber is a natural cellulose such as cotton and hemp, or a regenerated cellulose fiber such as viscose rayon and cupra. In the case of 100% cellulosic fibers or a blended or mixed woven material, it is desirable to contain 50% by weight or more of cellulosic fibers. Synthetic fibers mixed and woven with cellulosic fibers include polyamide fibers (eg nylon 6, nylon 6.6), polyester fibers (eg polyethylene terephthalate), polyvinyl alcohol fibers (eg vinylon), polyolefin fibers. All synthetic fibers such as (eg polyethylene), polyurethane fibers can be used.

The cellulase used in the present invention includes
Cellulase A3 (commercially available from Amano Pharmaceuticals, genus Aspergillus), cellulase T-AP4 (commercially available from Amano Pharmaceuticals, genus Trichoderma), macerase (commercially available from Meiji Pharmaceuticals, genus Trichoderma), cellulase XP-425.
(Nagase Sangyo, Trichoderma spp.), Cell Crust (commercially available from Novo Corporation, Trichoderma spp.) And the like are exemplified. Such cellulase is usually prepared as an aqueous solution of 0.1 to 5.0%, and the pH is adjusted to 3 to 6 with acetic acid, acetate or the like to obtain a cellulase-treated solution.

There are various methods of treating the fibers with cellulase. For example, the cloth is immersed in a cellulase solution which is kept at an active temperature in advance and held, or after the cloth is impregnated with the cellulase solution, It is carried out by squeezing the cloth and letting it pass through a temperature-controlled zone, or by winding it in a roll to keep it warm while preventing evaporation of water, and to carry out an enzymatic reaction, and a method of carrying out under wet conditions is preferable. The treatment time in the cellulase treatment is usually from 2 to 48 hours, although it depends on the texture and strength to be obtained, the cellulase concentration of the treatment liquid, the pH, the treatment temperature, the type of the fiber to be treated and the like. In addition, the treatment temperature is usually preferably in the range of 20 to 60 ° C. If the treatment temperature is too high, the enzymatic activity will be reduced more quickly.

The cellulosic fibers treated with the cellulase treatment solution contain 0.1 to 0.3% caustic soda and 0.3 to 0.3%.
After dipping treatment for 10 to 30 minutes in an aqueous solution of 40 to 60 ° C. containing 0.7% sodium thiosulfate, washing with water,
It is preferable to carry out a post-treatment for drying.

Next, a method of crushing the cloth after the enzyme treatment will be described. The crushing machine used in the method of the present invention is, as shown in FIG. 1, provided with a venturi tube (1), a turbine (2) for sending compressed air to the venturi tube (1), and an outlet side of the venturi tube (1). A wire mesh (3) and a pair of throttle cylinders (4) provided on the inlet side of the venturi tube (1),
(4 ') and a scrape (6) for storing the cloth (5),
A steam blow outlet (7) for blowing steam is used, and when the cloth (5) is introduced, the rope-like cloth (5) is introduced between the throttle cylinders (4) and (4 '). Then, this cloth is introduced into the Venturi tube (1), and the cloth (5) is impacted by the compressed air generated by the turbine (2), and continuously struck against the wire net (3) to perform crushing. Improve the texture.
Incidentally, (8) is a guide roller.

Then, in order to repeat the above-mentioned crushing operation, the cloth (5) is stored in the scrape (6) and sewn endlessly. When processing, the fabric speed is 300
~ 1000 m / min, treatment temperature 40 ~ 120 ° C, moisture content of cloth 0 ~ 70%, crushing frequency 30 ~ 3
00 times, depending on the material of the fiber, by steaming from the steam outlet (7), the fabric (5) is softly drapeable when subjected to a strong fuzz and contraction action by the crushing machine. It can be anything.

[0013]

Since the present invention is constructed as described above, it has the following actions.

Cellulase is an enzyme that catalyzes the reaction of hydrolyzing β-1,4-glycosidic bond of fibrin to produce cellobiose. Since this enzyme has a high molecular weight of about 60,000, an acid or the like is used. As it does not easily penetrate into the inside of the fiber like the low molecular weight substances, the hydrolysis reaction occurs from the surface of the fiber, and the hydrolysis action on the fiber is relatively mild, so it destroys the inside of the fiber and reduces the strength. Only the surface of the fiber can be hydrolyzed without causing it, and the surface of the fiber can be made soft.

By passing the cloth thus obtained through a crushing step, a rubbing effect and a shrinking effect are exerted, and a cloth which is soft and has a good drape can be obtained.

[0016]

Embodiments will be described in detail below based on embodiments.

Example 1 Cotton plain weave, warp, weft 100 count twin yarn, density 151 warp /
Ingredients of 74.5 inches and weft / inch are fried and desalted in the usual manner.
Scouring, bleaching, and mercerizing were performed.

Meisherase (manufactured by Meiji Pharmaceutical Co., Ltd.)
It was dipped in a 0.1% solution (pH 4.3 using M / 10 acetate buffer) and treated with a jet dyeing machine at a bath ratio of 1:20 for 2 hours. After the cellulase enzyme treatment, it was washed with hot water, washed with water and neutralized.

The plain weave fabric is used as a softening agent for Acliner W3.
20 (Trademark, Takamatsu Yushi Co., Ltd.) 30 g / l of the treatment liquid was passed through, and after squeezing to a pickup rate of 70%, 1
It was dried at 00 ° C. for 2 minutes.

Subsequently, the plain woven fabric was introduced into the crushing machine shown in FIG. 1 to obtain the product of Example 1. At the time of introduction, the fabric speed was adjusted to 850 m / min, the treatment temperature was 100 ° C., the water content was 30%, and the crushing frequency was 70 times.

Comparative Example 1 A product of Comparative Example 1 was obtained by performing the same processing as in Example 1 except that the same mercerized plain weave as in Example 1 was omitted from the cellulase enzyme treatment.

Comparative Example 2 A product of Comparative Example 2 was obtained by carrying out the same processing as in Example 1 except that the introduction of the plain weave of the mercerized as in Example 1 into the crushing processing machine was omitted.

The product obtained in Example 1 was far superior to the products obtained in Comparative Examples 1 and 2 in drapability and repulsion.

[0024]

As described in detail above, the method of the present invention exhibits an unexpected synergistic effect by combining the two steps, and is a cellulosic fiber cloth having an improved soft, drapeable, and repulsive feel. Is obtained, which is extremely useful as a casual application.

[0025]

[Brief description of drawings]

FIG. 1 is a schematic side view showing a crushing machine used for carrying out the method of the present invention.

[Explanation of symbols]

 1 Venturi tube 2 Turbine 3 Wire mesh 4, 4'Throttle cylinder 5 Cloth 6 Scrap 7 Steam outlet 8 Guide roller

Continuation of the front page (56) Reference JP-A-58-36217 (JP, A) JP-A-55-15852 (JP, A) JP-A-48-67559 (JP, A) JP-B-52-48236 (JP , B2)

Claims (1)

(57) [Claims] 1. After subjecting a cellulosic fiber cloth to a cellulase enzyme treatment, the enzyme-treated cloth is introduced into a Venturi tube, the cloth is transferred by compressed air, and the cloth is continuously struck by a wire mesh for crushing. A method for improving the texture of a cellulosic fiber cloth, which is characterized.