JPS58149956A - Method for ununiformly dyeing cellulosic fiber - Google Patents

Abstract

PURPOSE:To dye easily and ununiformly textile fabrics composed of single material with good reproducibility, by padding cloth composed of cellulosic fiber with a specified dye and treating the cloth with steam without drying. CONSTITUTION:A dye soln. is used which consists of 10-150pts.wt. alkali such as caustic soda and dye (A) which is water-insoluble but can be reduced to a water-soluble leuco dye which can be fixed, such as nihonthrene Red FBB (a product of Sumitomo Kagaku K.K.), 10-150pts.wt. solfinic reducing agent (B) such as sodium formaldehyde sulfoxylate, 0-30pts.wt. dispersant (C), etc., each amount being 100pts.wt. dye soln. Cloth composed of a cellulosic fiber such as cotton fiber, staple fiber or rayon silk is immersed in said dye soln., treated in a state having a water content of 20% or above with steam, and after-treated (water washing, oxidation treatment, soaping, etc.)

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for non-uniform dyeing of cellulosic fibers. More specifically, the present invention uses a dye liquid containing a water-insoluble dye that is reduced to dissolve and dye into a leuco compound, an alkaline agent, and a sulfinic unitary agent to cellulose-based delicate white cloth or dyed cloth. This invention relates to a non-uniform dyeing method for cellulose fibers, which is characterized by padding and steam treatment without drying.

According to the method of the present invention, it is possible to obtain a dyed product with flickering of dark and light colors on white cloth, and on cloth dyed with a dye having relatively resistance to reduction, it is possible to obtain a dyed product with iridescence. It will be done.

Traditionally, methods to achieve this elegant effect include spinning using pre-dyed yarns of two or more colors, or weaving or knitting blended, edged, or blended yarns made of two or more types of fibers. Dye it! 4! ! Methods include applying a combination of dyes, or creating speck particles of dye in advance and applying these particles. However, in these methods, spinning and knitting from ink-colored yarn increases the cost for small-lot production trends, the process becomes longer when using composite materials, and the method of creating and applying dye spec particles requires particles. Shortcomings such as lack of uniformity and reproducibility have been pointed out.

The present inventors have conducted extensive research on a method for easily obtaining non-uniform dyeing effects on fibers and knitted fabrics made of a single material with good reproducibility.As a result, the present inventors have discovered that cellulose fibers are water-insoluble and reduced and have a leuco compound. It was discovered that this could be achieved by padding the material with a dyeing agent and steaming it while retaining moisture.

In the present invention, cellulose-based delicate materials include cotton, soft cloth, human silk, etc., and these materials may be used alone or in combination of two or more kinds.

A dye that is water-insoluble, reduces, dissolves as a leuco compound, and dyes 1 is a rose [&! Examples include dyes, sulfur dyes, and sulfur pad dyes.

In order to obtain the effect of uneven beading on the dyed product, it is preferable that the dye that has already been dyed does not decrease in concentration under heat and alkaline conditions and is non-reducible or difficult to reduce. For example, It is selected from among reactive dyes having a trichloropyrimidine group, monochlorotriazine group, or monofluorotriazine group as a reactive group, as well as direct dyes, naphthol dyes, and inograin dyes.

Background dyeing is usually carried out by a known method and is not particularly restricted.

The present invention will be explained step by step.

Cellulose-based delicate white cloth or dyed cloth is water-insoluble and becomes a leuco compound by reduction, C-dissolved dye and alkaline agent, such as strength soda (tie! type product) 1
0-150 Arashiho part (JKJ11 part means dye liquid all 100
0t), preferably 20 to 11001j1
, sulfici-based reducing agents, especially sodium formaldehyde sulfoxylate lO~1501! a dye solution containing 1 part by weight, preferably 20 to 100 parts, and optionally 80 M parts of 'C>j powder, 0 to 80 parts by weight of a protective colloid agent for a dye leuco compound, and 1 to 1001 parts by weight of an inorganic IInθ. The fabric is impregnated with water and steam-treated at a moisture content of 20% (application ratio of dye solution to the weight of the dry fabric), preferably 60 to 90%. Then, it is finished by washing with water, oxidation treatment, soaping, and washing with water.

In this way, non-uniform dyeing of a single material, which was thought to be impossible in the past, can be achieved continuously and with good reproducibility, and the industrial value of the present invention can be said to be extremely high.

Next, the present invention will be explained in more detail using Example II#1. The part in the text indicates the iris part.

Example 1 50 parts of Nihonthrene Red FISB (knot dye: product of Sumitomo Chemical Co., Ltd.) were added to 80016 hot water at 80 to 40°C.
After letting it sit for a minute, drink strength soda (40°B'e)
100 il, 50 parts of Redol C (sodium formaldihyde sulfoxylate, a product of Sumitomo Chemical Co., Ltd.) and the remaining amount of water to prepare a dye dispersion with a total volume of 1000 parts.

Next, the cotton broad cloth was squeezed into the above dye dispersion at a squeezing rate of 90%.
Immediately steam-treated at 100°C for 60 seconds under saturated steam. Next, treated with an oxidizing solution containing 8 parts by volume of hydrogen peroxide (85% IE) at 60°C for 60 seconds. System cleaning agent 2
96°C for 60 seconds with a soaping liquid containing 50% of the total amount, and finish by washing with water.

In this way, a dyed fabric having a reddish shade of red was obtained.

On the other hand, padding the dye dispersion with a cotton broadcloth,
When the dye was dried and then steam-treated, the entire dye was uniformly dyed, and it was not possible to obtain a one-tone flickering effect.

Example 2 Sumifix Brilliant Red H-gB (monochlortriazine m reaction es: Sumitomo Chemical product) 80-
was dissolved in 800 parts of boiling water at 80 to 90°C, and then a total of 1000 parts by volume of a dye solution was prepared by adding 50 parts of urea, 20 parts of sodium bicarbonate, 1 part of sodium alginate, and the remaining amount of water.

Next, a cotton broadcloth was padded with the above dye solution at a squeezing rate of 60%, and after intermediate drying, it was heated to 100°C under a saturation of 8%.
, steam treatment for 10 minutes.

Then, after washing with water, treat with soaping liquid containing 1 part of nonionic detergent at 90℃ for 8 minutes, wash with water and finish.'' After dispersing 50 parts at a temperature of 80 to 40°C,
B'e) 100 parts, Redol zW (zinc formaldehyde sulfoxylate: product of Sumitomo Chemical Co., Ltd.), 50 parts, KYmu-7081 (dispersion protective colloid agent, product of Niiichisha Yushi Co., Ltd.), and salt! 60 II and remaining amount with water total 1000
Prepare parts by volume of the dye dispersion.

Next, the dyed cloth is padded onto the dye dispersion screen at a squeezing rate of 7ON, and immediately subjected to a steam treatment at 100° C. for 2 minutes under saturated steam.

Next, it was treated with an oxidizing solution containing 8 volumes of hydrogen peroxide (85% solution) at 60°C for 60 seconds, and then anionic cleaning*gs
Treated with a soaping solution containing 96°C and 60°C, and finished by washing with water.

In this way, a dyed cloth having a unique iridescent pattern was obtained.

On the other hand, when a dyed cotton cloth was padded with a dye dispersion, dried once, and then treated with steam, the entire cloth was uniform and no iridescence occurred.

Claims (1)

[Claims] A dye solution containing a water-insoluble dye, an alkaline agent, and a sulfine-based reducing agent, which is water-insoluble and dissolves and dyes as a leuco compound, is padded onto delicate cellulose-based white or dyed cloth, and then steam-treated without drying. A non-uniform dyeing method for cellulose fibers characterized by: