JPS5915584A - Post-treatment of 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 is dyed with fractional dye 1-! The present invention relates to a method for post-processing polyester/cellulose mixed fibers that have been dyed or printed using polynisdel weft yarns or printed polyester/cellulose weft fibers that have been dyed or printed using disperse dyes and reactive dyes.

In recent years, with the rapid rise in energy costs, low bath ratios, time-saving dyeing, and the use of waste heat through heat exchange have become commonplace in dyeing factories, and dyeing using solvents and low-temperature dyeing are also becoming popular. is visible. From this point of view, efforts are being made to streamline the post-washing process after dyeing, such as by omitting the reduction washing process for light colors and using reduction washing using residual dyeing baths, to save labor and energy. Needless to say, reduction cleaning and annealing at low temperatures and in a short period of time are desirable.

Reduction cleaning involves reductively decomposing and removing unfixed dyes that have settled on the fiber surface during dyeing to improve friction fastness and wet fastness.In addition, in the case of mixed fibers, it also removes contaminated and dispersed dyes from natural fibers. It reduces and decomposes the dye to facilitate removal, and at the same time reduces the dye that has fallen into the cleaning bath to prevent re-IM and re-contamination. Furthermore, in textile printing, in addition to the above-mentioned enhancement of fastness, removal of contamination, and prevention of reprinting of fallen dyes, there is also a need to prevent hot water contamination during washing. In this case, the lower the treatment temperature, the better the prevention of hot water contamination, but the fastness is often insufficient, and from this point of view, it is desirable to develop a post-treatment method that has a reduction cleaning effect at low temperatures. was.

On the other hand, dyeing using disperse dyes and reactive dyes! In the case of bamboo-printed polyester/cellulose mixed fibers, reduction cleaning using a reducing agent at high temperatures will break down the reactive dye fixed on the cellulose side and cause discoloration, so reduction cleaning is generally not applied. Therefore, it is common practice to simply use a surfactant and perform the annealing at a high temperature.

In this case, by using a reducing agent, a surfactant, and an alkali together at a low temperature, or a weak reducing agent, a surfactant, and an alkali at a high temperature, the fixed reactive dye is hardly affected. By reductively decomposing the dispersion dyeing t1 which has J = f on the fiber surface, the disperse dye which has contaminated the cellulose side, or the unfixed reactive dye which has directly adhered to the cellulose, a cleaning effect can be obtained in place of the soap dye. I knew it would happen.

However, in this method, the effect of decomposing contaminated or unfixed dye is weak, and sufficient cleaning effect cannot be obtained.
I couldn't do anything about it, so I had a hard time seeing it in terms of practicality.

In order to solve the above problems, the present inventors continued to conduct intensive studies on reduction cleaning methods, and found that reduction cleaning was carried out using specific anthraquinone in a cleaning bath containing a reducing agent, an alkali, and, if necessary, a C surfactant. If this process is carried out in the coexistence of other chemical compounds, the decomposition of dyes that are too thick on the fiber surface, undyed dyes, or dyes that have contaminated cellulose will be accelerated. The present invention was achieved by discovering that the effects of quinone compounds are fully exhibited. It is known that anthraquinone compounds speed up the reduction of vat dyes during steaming in cotton printing and improve color development, but until now they have not been applied in dilute concentrations such as in reduction washing and under low temperature conditions. No examples are known, and the present invention, in which this compound is applied to reduction cleaning, is surprising in its effectiveness.

The anthraquinone compounds specified in the present invention include 1
-Hydroxyanthraquinone, 2-hydroxyanthraquinone, 1,5-dihydroxyanthraquinone, 2,6
-dihydroxyanthraquinone, 1,6-dihydroxyanthraquinone, 2,7-, dihydroxyanthraquinone, 2,3-dihydroxyanthraquinone, anthraquinone, anthraquinone-2-sulfonic acid, anthraquinone-2,6-)sulfone acid, 1-aminoanthraquinone, 2-aminoanthraquinone, 2-ethylanthraquinone, 2-amylanthraquinone, ■-hydroxy-4-
Chloranthraquinone, 1-hydroxy-3-aminoanthraquinone, 1-chloro-2-hydroxyanthraquinone, 1-dimethoxyanthraquinone, 1,5-dimethoxyanthraquinone, ].

There are many compounds such as 8-dimethoxyanthraquinone, but in particular those that have 1 to 2 hydroxy groups, dissolve in water under alkaline conditions, and do not have a strong color and do not stain cellulose or polyester fibers are particularly useful. Suitably used. In the case of compounds with poor water solubility, it is desirable to add a small amount of a surfactant or a fine particle ratio to the cleaning bath.

The reducing agent used in the present invention may be any reducing agent that is normally used in this field, e.g.
:L)-hydrosulfite, It is also possible to use these reducing agents in combination.

The treatment temperature for reduction cleaning in the present invention is preferably between 20°C and 80°C, particularly between 40°C and 60°C, but when using a weak reducing agent such as reducing sugars, reductones, and reductites. It is effective to process at a relatively high temperature of 60°C or higher.

In addition, it is effective to maintain the pH of the treatment bath "/y" at 12 or higher by adding alkali to promote reduction, promote hydrolysis of unfixed disperse-dyed tF, and prevent the reprinting of fallen dyes or reduced decomposition products. It is possible to enhance the above effects by adding a reed, a normal surface, and an active agent.

Example 1 10 parts of a polyester/cotton (50150) blended knit fabric was mixed with Miketon Polyester I-B Blue TNF (manufactured by Mitsui Toatsu Chemical Co., Ltd., C, I Disperse Blue 207) 0.3 at a bath ratio of 1:20. Disper TL (manufactured by Kaisei Kagaku Co., Ltd.)
Dye for minutes, cool to 60°C, and use Selmazol Black B (C, manufactured by Mitsui Toatsu Chemical Co., Ltd.).

Reactip black 5) 0.5 parts, soda ash 20f/,
/l ff: Add and stain for 60 minutes at the same temperature. After draining, the sample was washed with water and treated as follows to carry out the present invention.

300B6 0.04 part of 2-hydroquine dissolved in 4 parts of soda, 0.8 part of hydrolylphite and 0.8 parts of nonionic surfactant at 45°C in 40 OCC water. The sample was treated for 10 minutes, washed with water and dried.

The resulting dyeing (li) had a blue color and good wet fastness and rub fastness.

Example 2 Instead of 2-hydroxyanthraquinone used in Example 1, 2,6-hydroxyanthraquinone 0,
Example 1 was carried out as described in Example 1, except that 1 part of ascorbic acid was used in place of the hydrozulfite and treated at 70° C. for 10 minutes.

The obtained navy blue dyed fabric had good wet fastness and rub fastness similar to those of Example 1.

Example 3 A polyester Amundsen fabric was printed using the following color paste.

Miketon Polyester Renodo 2BSF 20 parts (manufactured by Mitsui Toatsu Chemical Co., Ltd., C, I Disbirds Red 88)
Warm water 200 parts Maypro Gum NP (12%) 500 parts Tartaric acid (1:2) 10 parts Sodium chlorate (1:2) I
0 parts water 260
A total of 1000 copies of printed fabric were dried, treated with superheated steam at 175°C for 7 minutes, and washed with water.

This was further washed as follows.

At 35°C in 400 cc of water containing 0.03 part of 1,6-cyhydroquinanzuraquinone, 0.8 part of hydrosulfide and -5 parts of nonionic surfactant dissolved in 4 parts of sei soda. Processed for 10 minutes.

The resulting printed fabric with a red pattern had good wet fastness and rub fastness and no hot water stains.

Example 4 0.02 part of 1-chloro-2-oxyanthraquinone was used in place of the I, -6-dihydrochloro/anthraquinone used in Example 3. The procedure was as described in Example, except that 1 part of glucose and 0.5 part of glucose were used at 60° C. for 10 minutes.

The red printed fabric obtained by A4J had excellent wet fastness and friction fastness, and was completely free from hot water staining.

patent applicant Mitsui Toatsu Chemical Co., Ltd.

Claims (1)

[Claims] Technique: Reduction cleaning of polyester fibers dyed or printed with disperse dyes or mixed polyester/cellulose fibers dyed or printed with disperse dyes and reactive dyes in the coexistence of anthraquinone compounds. Characteristic post-processing method for fibers. 2) Reduction cleaning uses no-hydrosulfite as a reducing agent,
The method according to claim 1, characterized in that a formaldehyde sulfoxylate compound, a reducing saccharide, a reductone or a reductonate is used, and if necessary, a surfactant is used in combination. 3) The anthraquinone compound is an anthraquinone compound having at least one of at least one hydroxyl group, sulfonic acid group, alkyl group, halogeno group, alkoxy group, or amine group. A method according to claim 1 or 2. 4) Perform reduction cleaning at a processing temperature of 20° to 80°C! 1 to 3 of the claims
The method described in section.