JPH04241176A - Method for dyeing to worn-out tone - Google Patents

Abstract

PURPOSE:To impart the feeling of a worn-out old coat by subjecting a textile structure having surface unevenness to water-repelling treatment, raising treatment and dyeing. CONSTITUTION:A fluorine-based water-repellent is applied to a textile structure having unevenness on the fiber surface by padding method, etc., and the structure is subjected to dry-heating, heat-treatment, raising and dyeing to dye the protruded parts while preventing the dyeing of the recesses protected with the water-repellent. Accordingly, the obtained dyed structure has excellent worn-out gray feeling. The process enables easy and uniform production of dyed materials having various colors.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a method for dyeing textured fiber structures to give them a washed-out effect, and more particularly, the present invention relates to a method for dyeing textured fiber structures to give them a washed-out look, and more specifically, to make them look washed-out or worn-out by pre-treating them before dyeing, and to improve their fastness. The present invention relates to a method for dyeing a textured fiber structure with excellent texture.

0002

BACKGROUND OF THE INVENTION Usually, it is desired that dyed articles undergo little discoloration or fading even after repeated washing, that is, be dyed so that they are durable and do not wash out. However, in recent fashion trends among young people, clothes with a washed-out or worn-out look, such as blue denim, are preferred. In particular, casual pants called bleached-out denim are made of twill fabric dyed with indigo dye or sewn from the same, and bleached using a bleaching agent. Furthermore, not only the blue of indigo dye but also various hues of colored denim are washed out.
In other words, there is a growing tendency to prefer products that have a bleached-out appearance.

[0003] Conventionally, in order to meet such demands, dyeing with a reactive dye and then bleaching with chlorine, or dyeing with a vat dye and then bleaching with chlorine have been carried out, but each method has its own drawbacks. That is, the former generally has poor chlorine fastness of the reactive dye, making it difficult to control the concentration of the dyed fabric, while the latter has so good chlorine fastness that it is difficult to get a bleached-out feeling. In either case, the bleaching process is a batch method such as a wince, which takes a long time, and even the dye that remains unbleached is affected by the bleaching agent, resulting in poor fastness. descend. Furthermore, since sodium hypochlorite or the like is used as a bleaching agent, there are drawbacks such as odor problems and poor workability.

[0004] Other methods for achieving a bleach-out finish include dyeing only the ridges of the texture of the cloth, that is, only the surface, using a gravure roll, or applying the dye, passing water through it, and then fixing the dye. etc., but there are problems with reproducibility.

[0005] In order to solve these problems, Japanese Unexamined Patent Publication No. 5
Publication No. 9-163491 describes dyes that are water-insoluble and can be reduced to dissolve and dye into leuco compounds, alkaline agents, sulfinic reducing agents, and alkaline and reducing inorganic materials. A method has been proposed in which a dye solution containing a metal compound is padded and steam-treated without drying to obtain a dyed cloth with a washed-out feel, but since only vat dyes, sulfur dyes, sulfur vat dyes, etc. can be used, the hue is There are problems in that the vat dye and the like are decomposed by the reducing agent, so that the dye concentration gradually decreases and tailing occurs.

[0006]

[Problems to be Solved by the Invention] An object of the present invention is to solve the above-mentioned problems in imparting a natural, worn, washed-out appearance to a fiber structure with uneven surfaces. It is. That is, the present invention provides a dyeing method that can easily and uniformly impart a natural, worn-out, washed-out feel to an uneven fiber structure, and also allows for various hues.

[0007]

[Means for Solving the Problems] The above-mentioned object is to provide a fiber structure having an uneven surface, which is characterized by applying a processing liquid containing a water repellent to a fiber structure having an uneven surface, raising it, and then dyeing it. This is achieved by a washed-out dyeing method for textile structures.

The present invention will be explained in detail below.

In the present invention, the textured fiber structure refers to woven or knitted fabrics that have unevenness on the surface due to differences in texture such as plain woven fabrics or twill woven fabrics or the thickness of the threads used, or mechanically woven fabrics such as embossing. Examples include nonwoven fabrics having irregularities formed by a method, and the fibers constituting these fiber structures are not particularly limited.

[0010] As the water repellent used in the present invention, general water repellents such as fluororesin-based, silicone resin-based, paraffin-based, and zirconium-based water repellents can be used. The amount of water repellent to be used is appropriately selected depending on the type of water repellent, the type of fiber, and the feeling of washing.

The raising in the present invention may be carried out using a cloth needle, emery paper, sand cloth, etc., or these may be used in combination. The degree of napping is appropriately selected depending on the type, texture, and washed-out feel of the fiber structure.

Next, the processing method of the present invention will be explained. The above-mentioned fiber structures with uneven surfaces may require pretreatment processes such as sintering, desizing, scouring, bleaching, mercerization, and heat setting for textiles containing cellulose fibers, depending on their constituent materials. Processed yarn fabrics containing fibers undergo pretreatment processes such as relaxing, desizing, scouring, and presetting; synthetic fiber filament fabrics undergo pretreatment processes such as desizing, scouring, presetting, and alkali reduction; and fabrics containing silk undergo pretreatment processes such as desizing, scouring, presetting, and alkali reduction. Glue removal,
Pre-treatment steps such as scouring and bleaching are performed on textiles containing wool.

[0013] Next, the above processing liquid is applied to the fibrous structure. Methods for applying the processing fluid include a padding method, a spray method, a coating method, etc., but the padding method is preferred. After applying the processing liquid, drying is performed according to a conventional method, and heat treatment is performed if necessary. Drying is 90-13
Approximately 1 to 3 minutes at 0°C is preferable, and the heat treatment is performed at 140 to 17
About 2 to 5 minutes at 0°C is preferable.

[0014] Thereafter, napping is carried out using the method described above, and then a dyeing process is carried out. Examples of the dyeing method include a continuous dyeing method, a dipping method, etc., and a continuous dyeing method is preferable. The dye used may be a direct dye, a reactive dye, an acid dye, a cationic dye, a disperse dye, a metal-containing dye, etc. depending on the type of fiber. For example, direct dyes and reactive dyes are used for cellulose fibers, disperse dyes are used for polyester fibers, acid dyes and reactive dyes are used for nylon fibers, and metallic dyes and reactive dyes are used for wool fibers. It will be done.

[0015]

[Operation] Since the present invention is configured as described above, the water repellent in the convex portions of the fiber structure is removed by raising, and the convex portions are dyed in the dyeing process, while the water repellent in the concave portions of the fiber structure is removed. Since it is not removed by raising and the concave portions are not dyed in the dyeing process, the overall result is a marbling tone and a washed-out feel.

[0016]

EXAMPLES Next, the present invention will be specifically explained based on examples.

Example 1 In this example, the fiber structure has a warp density of 108 threads/inch, consisting of a 20th warp double yarn and a 20th weft double yarn.
A cotton twill fabric with a weft density of 58 threads/inch was used, which was subjected to desizing, scouring, bleaching, and mercerization using conventional methods.

The twill fabric was treated with 30 g of Riken Resin FGX-KM (manufactured by Miki Riken Chemical Co., Ltd.) as a fluorine-based water repellent.
The sample was immersed in a treatment solution containing 1.1 and water, and the pick-up rate was reduced to 70%. After drying at 120°C, heat treatment (baking) was performed at 150°C for 3 minutes.

[0019] The twill fabric to which the water repellent was applied was treated with React
ive Orange2 1.5g/l, React
iveBlack 1 2.0g/l, baking soda 20g/
1, urea 80g/l, reduction inhibitor 10g/l, and water were immersed in a treatment solution adjusted to a bath, and the pick-up rate was 70%.
I narrowed it down to. After drying at 120° C. and 150° C. for 3 minutes, washing with water, washing with hot water, washing with water again, and drying was performed to obtain a washed-out dyed cotton fabric of an example of the present invention.

[0020]

[Effects of the Invention] As described above, according to the method of the present invention, it is not difficult to control the dyeing concentration as in the conventional method, the process time is short, there is no problem with odor, and a strong washed-out feeling with excellent reproducibility is obtained. A certain amount of processing can be achieved continuously, and its industrial utility value is great. Furthermore, the resulting product can be of any hue, has an unprecedented washed-out feel, and is extremely useful for casual use.

Claims (1)

[Claims] 1. A method for dyeing a fibrous structure with an uneven surface to give a washed-out effect, which comprises applying a processing liquid containing a water repellent to the fibrous structure having an uneven surface, raising the fabric, and then dyeing the fabric.