JPS59163491A - Non-uniform dyeing of cellulosic fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for non-uniform dyeing of cellulosic fibers.

According to the method of the present invention, dyed products with flickering shading can be obtained with good reproducibility on white fabrics, and iridescent dyed products can be reproduced on fabrics dyed with dyes that are relatively resistant to reduction. You can get good results.

Conventionally, methods for obtaining such effects include spinning using dyed yarns of two or more colors, or adding individual fibers to woven or knitted fabrics of blended, interwoven, or mixed yarns made of two or more types of fibers. Methods include applying a combination of dyes that dye the material, or creating speckled dye particles in advance and applying them. However, in these methods, spinning and initial knitting from dyed yarn increases the cost for small loft production, the process becomes longer when using composite materials, and the method of creating and applying dye spec particles depends on the uniformity of the particles. Shortcomings such as lack of reproducibility have been pointed out.

The inventors of the present invention have conducted extensive research into methods for obtaining uneven dyeing effects on woven and knitted fabrics made of a single material with good reproducibility without the drawbacks mentioned above. A dye solution that is water-insoluble and reduces to become a leuco compound, dissolves and dyes, ■alkaline agent, ■sulfinic reducing agent, ■alkaline and reducing inorganic metal compound containing dye liquid is applied to the pad to retain moisture. We have discovered that this can be achieved by steam treatment.

That is, the present invention provides a dye, an alkaline agent, a sulfic acid reducing agent, and an alkaline reducing inorganic metal that is water-insoluble and dissolves and dyes a white cloth or dyed cloth made of cellulose fiber as a leuco compound. This is a non-uniform dyeing method for cellulose fibers, which is characterized by applying a dye solution containing a compound to a steam treatment without drying.

In the first invention, dyes that are water-insoluble and can be reduced to dissolve and dye in the form of diryco compounds include vat dyes, sulfur dyes, and sulfur vat dyes.

On the other hand, in order to obtain a non-uniform iridescent effect in the dyed product, it is advantageous to use dyed fabrics made of cellulose fibers. In this case, it is preferable to use a dyed cloth that has already been dyed with a dye that does not decrease in concentration under heat and alkaline conditions and is non-reducible or difficult to reduce. Those having a functional sochlorotriane group, cycloquinoxaline group, monochlorodifluoropyrimidine group, hynylsulfone group, hynylsulfone/'monochlorotriane group, monochlorotriane group, trichloropyrimidine group, monofluorotriazine group, etc., and direct It is dyed with dyes selected from dyes, naphthol dyes, and inglaci dyes. Ground dyeing using these dyes can be carried out using commonly used methods.

In the present invention, examples of the sulfici-based reducing agent include hydrosulfide, zinc formaldehyde sulfoxylate, and sodium pormaldehyde sulfoxylate.

In the present invention, examples of the alkaline and reducing inorganic metal compound include sodium borohydride, potassium borohydride, thorium borohydride, thorium borohydride, borohydride, Examples include lithium boron hydride, uranium boron hydride, boron aluminum hydride, lithium aluminum hydride, and these may be used alone or in combination of two or more.

In the present invention, cellulose fibers include cotton, cotton wool, human silk, and vesiperg, and these fibers may be used alone or in combination of two or more types.

In the present invention, the alkaline agent may be one or a mixture of two or more of the following: hydroxides of alkali metals such as caustic sota, caustic potash, carbonate sota, and carbonates such as potassium carbonate.

Next, the present invention will be explained step by step.

Water-insoluble dyes and alkaline agents that dissolve and dye white or dyed cellulose fiber cloth by reducing them to become leuco compounds, such as 10 to 1 liter of sodium hydroxide (solid).
50 parts by weight (parts by weight is based on 1000 i of the total amount of dye solution), preferably 20 to 100 parts by weight, 10 to 150 parts by weight of a sulfinic reducing agent, such as chlorine formaldehyde sulpoquinate, preferably 20 to 100 parts by weight. Jusha Department, Inorganic metal compound with alkaline and reducing properties 0.
A dye containing 1 to 10 parts by weight, preferably 1 to 7 parts by weight, and optionally 0 to 30 parts by weight of a dispersant, O to 30 parts by weight of a protective colloid agent for the dye leuco compound, and 0 to 100 parts by weight of an inorganic salt. Impregnate the fabric with a moisture content of 20% (applying ratio of dye solution to dry fabric weight of 9 or more, preferably 50%).
Steam at ~90% condition. 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 applied to a wide range of hat dyes and can be obtained continuously with good reproducibility, and the industrial value of the present invention is extremely high. It can be said to be expensive.

In particular, the combination of alkaline and reducible inorganic metal compounds improves the dyeing speed of hat dyes, sulfur dyes, and sulfur hat dyes that are difficult to reduce, and makes them applicable.
Since the reproducibility of staining is greatly improved, it is possible to obtain features that make the work easier.1 Next, the present invention will be explained in more detail with reference to Examples. Parts in the text indicate parts by weight.

Example] After dispersing 50 parts of Nihonsurene Fraun BR (Hatsuto dye: product of Sumitomo Chemical Co., Ltd.) in 800 parts of hot water at 30-40°C, 100 parts of force soak (40°B'e) and Redor c-man ( Sodium formaltehyde sulfoxylate (manufactured by Sumima Kagaku Co., Ltd.) 5 A total of 1000 parts by volume of a dye dispersion was prepared using 5 parts of ON borohydride purple potassium and the remaining amount of water.

Next, squeeze the homemade cotton float into the above dye dispersion at a rate of 90%.
Immediately heat at 100°C160 under saturated steam.
No steam treatment for seconds.

Next, after treatment with an oxidizing solution containing 3 parts by volume of hydrogen peroxide (35% solution) at 60°C for 160 seconds, anionic cleaning agent 2
Treat with soap pink solution containing 95°C for 160 seconds, and finish by washing with water.

In this way, a dyed cloth with flickering shading of a fluffy color was obtained.

In this case, when the dyeing solution did not contain potassium boron hydride, the dyeing concentration was low and color discoloration occurred.

In addition, when a cotton float white cloth was banded around dye-dispersed cloth, once dried, and then steam-treated, the entire cloth was uniformly dyed, and only a flickering effect of light and shade could be obtained.

Example 2 Sumifix Brilliant 1/Tsudo f (-3B
(Monochlorotriazine type reactive dye: Sumitomo Chemical product)
After dissolving 30 parts in 300 parts of boiling water at 80 to 90°C, a total of 1000 parts by volume of dye solution is prepared by adding 50 parts of urine concentrate, 20 parts of bicarbonate of soda, 1 part of alkynic acid sorter, and the remaining air with water.

Next, a cotton broad cloth was padded with the above dye solution at a squeezing rate of 60%, and after intermediate drying, it was heated at 100° under saturated steam.
C1 Steam treatment for 10 minutes.

After rinsing with water, it is treated with a soaping liquid containing 1 part of sawdust detergent at 90°C for 13 minutes, and finished by rinsing with water.

Separately, 50 parts of Nihonsuren Fraun R (/\t dye: product of Sumitomo Chemical Co., Ltd.) was dispersed in 300 parts of hot water at 30 to 40°C, and then 100 parts of pyropotassium (40°B'e) and Redol were dispersed. /- ZW (syncopormaldehyde sulfoxylate: Sumitomo Chemical product) 50s, sodium borohydride 3 parts, K
YA-703B (dispersion protective colloid agent manufactured by Nimansha Yufuku), 50 parts of common salt and the remaining amount with water to 1110 C1O
Prepare parts by volume of the dye dispersion.

V (niai) dyeing process was squeezed into the above dye dispersion at a rate of 70%.
Immediately (under saturated steam at 100'C2)
Steam for 2 minutes. Then hydrogen peroxide (35
% solution) containing 3 parts by volume at 60°C for 6 () seconds, and then treated with a saw pink solution containing 2 parts of anionic detergent for 9 seconds. , 5°C 160 Chichima treatment and finish by washing with water.

A dyed cloth with a hidden, unique pattern of Tamamushi In was obtained.

Even when the dye dispersion was used 5 hours after it was prepared, a good iridescent pattern was obtained.

On the other hand, when the hydrogenated boric acid sorter was not included, the dyeing was insufficient.

Note that when a cotton cloth is padded with the dye dispersion, once dried, and then treated with steam, the whole is uniform and does not have an iridescent pattern. Example 3 In Example 2, the reactive dye was replaced with Sumifix Brilliant Flu F Special (sulfate ethyl sulfone type reactive dye '#J = product of Sumitomo Chemical Co., Ltd.) and ground dyeing was performed. Do this.

In addition, a dispersion of a hat dye was added to Nipponsurenlet I''B B (vat dye: a product of Sumitomo Chemical Co., Ltd.), and 1.5 parts of -C lithium aluminum hydride was added to an alkaline and reducing inorganic metal compound. A dyed fabric with a purple iridescent tone was obtained on a fluted background.Also, even when the dye dispersion was used after 5 hours, a dyed fabric with reproducibility was obtained.

Claims (2)

[Claims] (1) White cloth or dyed cloth made of cellulose fibers contains 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 metal compounds. A non-uniform dyeing method for cellulose fibers in which the dye solution is padded and steam treated without drying. (2) The cellulose fiber dyed fabric is either reactive dye, direct dye, naphthol dye, or inkrain dye.
Alternatively, the method according to claim 1 is a dyed cloth dyed using a combination of these methods.