JPH07310292A - Fabric for product accompanying washing process of product and its production - Google Patents

Abstract

PURPOSE:To obtain a soft product, in which dye is properly dropped when washing finishing of product, having washed and bleached feeling by controlling water content of a blended fabric of a cellulose-based fiber with a polyester fiber to a specific range and then sulfurizing the blended fabric with sulfur dye. CONSTITUTION:Twill fabric obtained by weaving a blended yarn of a polynosic fiber with a polyester fiber is subjected to singeing, desizing, scouring and bleaching and the polyester fiber side is dyed with a disperse dye using a liquid flow dyeing machine and the width of the fabric is widened and dried. Then, water is applied to the woven fabric by a rotary damping apparatus to control the water content of the fabric to 5-20 wt.% and the fabric is continuously impregnated in a sulfur dye bath and dried and subjected to padding in a chemical pad bath containing a reducing agent and squeezed and subjected to steaming treatment to carrying out solidification of sulfur dye and subjected to oxidation treatment to sulfurize the polynosic fiber with the sulfur dye. Sulfur dye attached to a polynosic fiber surface part is properly dropped by washing and finishing the dyed product to provide the objective woven fabric having washed and bleached feeling.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a dyed woven fabric for textile products with a product washing process and a method for producing the same. More specifically, part of the dye falls off or fibrillation occurs during the washing process of the product, and the feeling of washing off is effectively expressed especially at the seam part, and the texture characteristics of the material are disturbed. The present invention relates to a dyed woven fabric for a textile product and a manufacturing method thereof, which can meet a wide range of demands of the market without being washed and can also satisfy the demand of different color tone.

[0002]

2. Description of the Related Art Outer garments made of 100% cotton thick yarn twill fabric using warp yarns which have been pre-dyed with synthetic indigo or vat dye are widely known as denim and blue jeans. In recent years, since the texture of the garment is hard and the appearance is monotonous, processing called stone wash, chemical wash, biowash, etc. is performed in product washing. However, it is far from being lightweight and soft to the touch, and the hue is limited. In addition, polyester / cellulosic products have come to be washed in order to reduce the weight and soften the texture, but since it is added together with the pigment binder as a coloring method, the product may be washed off, but it is given. The texture is hindered by the binder.

Although rayon and hemp are used as cellulosic fibers, those using reactive dyes, direct dyes, vat dyes, etc. can give a certain feeling, but have almost no feeling of washing off. Not only does it not come out, but there is a problem that the strength is greatly reduced when biowashing is performed. Further, there are problems such as poor shrinkage resistance and inability to deal with different-colored ones, which is not substantial. A product dyed with a partially finely divided vat dye has a good discoloration feeling, but has many problems in color reproducibility and stability and has not been widely used.

A method of dyeing a cloth with a cation dye after cationizing the cloth in advance is also conceivable, but there are problems in deterioration of fastness and cost, and further in processing stability such as uneven dyeing.
Therefore, it has a light weight and soft texture, and it has a good discoloration feeling,
None of them have a wide variety of hues, can express freely from the same color system to different tones, have good fastness, are inexpensive, and have excellent processing stability.

[0005]

[Problems to be Solved by the Invention] It is possible to meet a wide range of demands in the market by using the manufacturing process of product washing that is currently popular, and it is possible to express a feeling of being exposed to washing without impairing the feel characteristics of the material which is lightweight. At the same time, the present invention relates to a product woven fabric with a product washing process for stably obtaining a product having good color fastness and various physical properties and rich color expression, and a method for producing the same.

[0006]

That is, the present invention is a composite woven fabric of cellulosic fibers and polyester fibers,
The surface layer of the cellulosic fiber is dyed with an insolubilizing sulfur dye. When dyeing the fabric for products and the cellulosic fiber with the product washing process with the sulfur dye, after the water content of the cellulosic fiber is adjusted to 5 to 20% by weight. A method for producing a fabric for a product, which involves a product washing process in which a sulfur dye is impregnated and dried, then a reducing agent is impregnated, the dye is converted into a rheumatic body by a steaming method, and then an oxidation treatment is performed. Cellulosic fiber / polyester fiber is a composite to meet a variety of texture requirements, and because the physical properties, fineness, cross-sectional shape, etc. of the fiber can be controlled, polynosic fiber is desirable as the cellulosic fiber, and stable wash-off is also possible. In order to satisfy the feeling, the fastness of dyeing, the variety of hues, the processing stability, etc., the cellulosic fiber side is dyed with a sulfur dye mainly on the fiber surface layer.

In order to meet a variety of demanded textures, the necessity of compounding the cellulose-based material and the polyester-based material may be such that the polyester-based material may be filament or staple, and the fiber thickness is 0.1 to 5 per single yarn. .0d,
The cross-sectional shape is round, irregularly shaped, hollow, etc., and there is a wide range of choices such as the type of raw material polymer, so that it can be widely applied. Regarding the more important discoloration feeling, the disperse dye on the polyester fiber side has good durability due to enzyme washing, so even if the dye on the cellulosic fiber side falls off, it will not completely turn white and remain as a bottom color. The product can give a feeling of calmness.
Therefore, in general, good results can be obtained by dyeing the polyester fiber side to ½ or less of the dyeing density on the cellulose fiber side.

Further, if necessary, it is possible to obtain the iridescent effect due to the different color effect between the cellulose fiber side and the polyester fiber side. From the viewpoint of the strong holding surface, the strength of the cellulose fiber side is reduced by the enzyme and other washing steps, but the presence of the polyester fiber provides a reinforcing effect.

In addition, although the cellulose fiber side is generally not good in terms of shrinkage resistance, the polyester fiber is also useful for improving this. The cellulose fiber side plays a major role in giving a wash-out sensation by washing the product, and also exerts an effect of imparting the texture, color effect, hygroscopicity and natural feeling.

In particular, when polynosic is used as the cellulosic fiber, the softness of the texture can be far superior to that of the cotton material. Furthermore, by carrying out enzyme washing with a washer, polynosic fibrillation occurs and a so-called peach feeling is obtained.

The proportion of cellulosic fibers is preferably in the range of 40 to 85%. When it is less than 40%, the feeling of washing off is small, the texture of polyester is strong, and the texture of polynosic is sufficiently utilized. Not done. 85% again
If it exceeds the range, problems may remain in the wet strength, and the effect of leaving as a bottom color and the effect of producing a discoloration tend to be small. When the ratio of the cellulose fiber and the polyester fiber is within the above range, in particular, the texture is light,
It is possible to obtain a fabric for washing products, which is excellent in discoloration feeling and various properties.

The dyeing of the cellulosic fiber with the sulfur dye is carried out by padding with the sulfur dye, drying, and then reducing with a water-soluble sulfur dye by a two-phase method of chemical pad, steaming, oxidation, and water washing, and an insoluble sulfur dye. It is also possible to use a one-phase method in which the Ryuco body together with the agent is washed with pad, dry, steam, and oxidizing water.

Further, spec dyeing is also possible by dyeing with a two-phase method using an insoluble sulfur dye. However, the two-phase method using a water-soluble sulfur dye is most preferable because it has a good balance between wash-off feeling and fastness. It is considered that this is because the dyeing behavior of the sulfur dye is different from that of other dyes for cellulose fiber, and it is easy to dye the surface.

The polyester fiber may be dyed by a jet high-pressure dyeing method using a disperse dye, a continuous dyeing method using a pad dry cure, or another dyeing method. However, by performing it before dyeing the cellulosic fiber, reduction washing can be performed. It can be reduced.

Since the polyester fiber dyed with the disperse dye is less likely to be discolored in the subsequent washing of the product, the polyester fiber is dyed to a desired wash-off feeling (whiteness) by using this. As a result, the feeling of discoloration is further stopped. Further, when it is desired to wash a product of a different color, it can be easily obtained by changing the hues of the polyester fiber side and the cellulose fiber side.

When the cellulosic fiber is a polynosic fiber, it is less affected by the strength reduction due to the enzyme treatment in product washing as compared with cotton and hemp, and is superior to other cellulosic fibers in softness of texture. At the same time, it is possible to obtain a unique peach feeling due to the fibrillation phenomenon and a velvety appearance at the same time.

It has been found that the discoloration feeling in washing the product is better when more dyes dyed on the cellulose fiber side are stopped on the fiber surface layer, and as a means for achieving this, as a result of earnest research, cellulose such as polynosic fiber was found. Water content before dyeing with sulfur dye on the fiber side is 5 to 20%, preferably 8 to
By setting it to 15%, a product with a better discoloration feeling can be obtained. This is because, especially when polynosic fiber is impregnated with a water-soluble dye, only water enters the inside of the fiber, and a sulfur dye having a large molecular weight is difficult to diffuse internally, and the degree of surface attachment of the sulfur dye is the same as in the case of a normal method. It is thought to be different.

The moisture content of the fabric before the impregnation with the sulfur dye solution is irritated on the surface when the moisture content of the fabric before the impregnation of the dye is less than 5%, and discolors when it exceeds 20%. The feeling is sharply reduced, the commercial value is reduced, and the dyeing is uneven and the quality is poor.

[0019]

EXAMPLES The present invention will now be described with reference to examples, but the present invention is not limited thereto. Example 1 A twill fabric using a 20-single yarn blended spun yarn composed of 20% polyester fiber and 80% polynosic fiber was quilled, desizing, scouring, and chlorite bleached by a normally used continuous spreading system device. , Jet dyeing machine 0.5% disperse dye (owf)
Stained with. After spreading and drying this, water is applied with a rotary damping device, then water is applied with a vertical damping device, and then internally penetrated with a timing device for 1 minute,
A moisture content of 17% was obtained. Subsequently, a water-soluble sulfur dye (Asathiosol Pure Blue-6R 50 g / d, manufactured by Asahi Chemical Industry Co., Ltd.) and 2 g / l sodium alginate were continuously padded at a squeezing rate of 80%, and subsequently dried at 110 ° C.

Next, a chemical pad solution (Asahi Sulfagen (Asahi Chemical Industry Co., Ltd.) 25 cc /, soda ash 40 g /
l, caustic soda (20g / l, anhydrous sodium sulfate 30g / l) at room temperature after padding with a drawing rate of 80%, then 100-103 ° C
I steamed for 1 minute. Then 3 air rings
Perform 0 seconds, wash with continuous open soaper, oxidize, warm wash,
Soaping, washing with warm water, washing with water, and drying were carried out and the tenter was extended. The oxidizing tank was treated with 2 cc / l hydrogen peroxide and 2 g / l soda ash at 90 ° C.

Example 2 A twill weave of No. 20 single yarn, a mixed spinning fabric of 40% polynosic fiber and 60% polyester fiber, was subjected to disperse dyeing of polyester fiber in the same manner as in Example 1 under bleaching.

Subsequently, the moisture content of the fabric was adjusted to 5%, and the same sulfur dyeing as in Example 1 was performed. Polynosic fiber 7
A twill fabric of 0% and 30% polyester fiber mixed yarn No. 20 single yarn was dyed with a disperse dye of polyester fibers in the same manner as in Example 1. Subsequently, the same dyeing with the sulfur dye as in Example 1 was performed with the fabric water content of 8%.

Comparative Examples 1 and 2 Commercially available 10/1 yarn-dyed twill fabric of 100% cotton (comparative example 1) and commercially available polynosic fiber 70%, polyester fiber 30% blended yarn No. 20 single yarn twill fabric (comparative example 2). ), Which was coated on both sides with pigment, was treated with an enzyme as well as a softener with the following formulation.

Machine used: 2-split, forward / reverse washer processing Entilon CM 40L 2g / l
(Manufactured by Rakuto Kasei Co., Ltd.) Condition bath ratio 1:10 temperature 55 ° C. × 60 minutes Ceramic ball to dough 1: 1 PH 5.5 After treatment, enzyme activity was stopped, washed and finished.

Table 1 shows the evaluation results of the fabrics of Examples 1 to 3 and Comparative Examples 1 and 2.

[0026]

[Table 1]

Evaluation ◎ Very good ~ × Poor evaluation personnel 5 people Evaluation method Degradation of color, texture, degree of fibrillation, and dyeing quality were determined by 5 people's visual judgment and averaged by ◎ ~ △ ~ × method. . Discoloration: Look at the whiteness of the convex and concave parts of the seam. Texture: Evaluation of softness, peach, resilience, and swelling. Degree of fibrillation: The highest number was rated as ◎ and the least number was rated as × in the video microscope 500 times. Dyeing quality ... A sensory evaluation of irritability, unevenness, and moistness. Weight JIS L1096 6.4 Lightfastness 〃 L0842 (4th class irradiation) Washing 〃 L0844A-2 (discoloration / contamination) Masatsu 〃 L08492 type (Gakushin method) (dry / wet) tearing strength 〃 L1096B Tearing strength)

[0028]

EFFECT OF THE INVENTION Since the surface layer portion of the cellulosic fiber is dyed only with the sulfur dye, the product woven fabric obtained by the method of the present invention is washed at the time of washing products such as jeans. The dye is appropriately removed to give a wash sensation, and the insolubilized sulfur dye has excellent fastness and does not impair the texture, so a product with a soft texture and stable discoloration Can be provided.

Claims (2)

[Claims] 1. A woven fabric for products, which is a composite woven fabric of cellulosic fibers and polyester fibers, wherein the surface layer portion of the cellulosic fibers is dyed with an insolubilizing sulfur dye, and which is accompanied by a washing process. 2. When dyeing a cellulosic fiber with a sulfur dye, the moisture content of the cellulosic fiber is adjusted to 5 to 20% by weight, then impregnated with the sulfur dye and dried, and then impregnated with a reducing agent to perform steaming. A method for producing a fabric for products, which involves a product washing process in which a dye is converted into a leuco body and then oxidized.