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Method for improving color fastness of protein fiber product through enzymic method

A protein fiber, dyeing fastness technology, applied in dyeing, fiber treatment, animal fiber, etc., can solve the problems of poor biodegradability of chemical fixing agents, increased formaldehyde release from fabrics, and decreased hand feel, etc., to achieve safe and environmentally friendly treatment processes , The effect of increasing the utilization rate of dyestuffs and decreasing the chromaticity

Active Publication Date: 2014-07-09
无锡协新毛纺织股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While these surfactants improve the dyeing depth and fastness of fiber products, some of them also have problems such as increasing the amount of formaldehyde released from the fabric and reducing the hand feel. Application of improving color fastness of protein fiber products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The sample selected in this implementation is silk power spinning (gram weight 60g / m2) as raw material 2 ).

[0024] (1) Fiber tyrosinase treatment: soak the silk fabric in tyrosinase solution, the treatment conditions are tyrosinase 10U / mL, pH 7, temperature 30°C, time 4h, bath ratio 1:20.

[0025] (2) Acid dye dyeing: the fiber product after the enzymatic treatment in step (1) is dyed with acid dye in another dyeing bath, wherein acid violet 2R0.05g / L, pH4, temperature 98°C, time 45min, liquor ratio 1 : 20; after dyeing, the fabric was washed at 60°C for 10 minutes.

[0026] Sample 1: dyed sample with steps (1) and (2);

[0027] Sample 2: only dyed sample with step (2) process;

[0028] After the above process, the dyeing depth K / S of sample 1 is 2.336, and the color change of washing fastness is 4-5, and the staining is 4-5; the dyeing depth K / S of sample 2 is 1.159, and the washing fastness changes color Level 4, staining level 4. Compared with sample 2, sample...

Embodiment 2

[0030] The sample selected for this implementation is silk twill (gram weight 85g / m2) made of mulberry silk. 2 ).

[0031] (1) Fiber laccase treatment: immerse silk fabrics in laccase solution, in which laccase 20U / mL, pH7, temperature 30°C, time 4h, bath ratio 1:20.

[0032] (2) Acid dye dyeing: After step (1) enzymatic fiber modification and pretreatment, adjust the pH of the system to pH4, then add acid blue 2BR to dye at elevated temperature, wherein the dye is 0.2g / L, the temperature is 98°C, and the time is 45min. The bath ratio is 1:20; after dyeing, the fabric is washed with water at 60°C for 10 minutes.

[0033] Sample 3: dyed sample with steps (1) and (2);

[0034] Sample 4: dyed sample with step (2) process;

[0035] After the above-mentioned process, the dyeing depth K / S of sample 3 was 3.146, the color change in washing fastness was grade 5, and the staining was grade 4; the dyeing depth K / S of sample 4 was 2.754, and the color change in washing fastness was gr...

Embodiment 3

[0037] The sample selected for this implementation is a chlorinated wool top.

[0038] (1) Catechol oxidase treatment: soak the wool tops that have partially removed the scale layer in catechol oxidase, in which catechol oxidase is 20U / mL, pH7, temperature 30°C, time 4h, liquor ratio 1:20.

[0039] (2) Acid dye dyeing: after the pretreatment of enzymatic fiber modification in step (1), adjust the pH of the system to pH4, and then add weak acid black NBG for dyeing at elevated temperature, wherein the dye is 0.05g / L, the temperature is 98°C, and the time is 45min , Liquor ratio 1:20; Wash the fabric at 60°C for 10 minutes after dyeing.

[0040] Sample 5: dyed sample with steps (1) and (2);

[0041] Sample 6: dyed sample with step (2) process;

[0042] After the above-mentioned process, the dyeing depth K / S of sample 5 is 1.231, the color change of washing fastness is 4 grades, and the staining is 4-5 grades; the dyeing depth K / S of sample 6 is 1.050, and the washing fastness...

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Abstract

The invention discloses a method for improving color fastness of a protein fiber product through an enzymic method. Tyrosine in silk, wool and other protein fibers is subjected to catalytic oxidation to generate quinonyl by means of polyphenol oxidase (tyrosinase, catechol oxidase and laccase), the quinonyl is further subjected to an addition reaction with amino-containing acid dyes, and the dyeing depth and color fastness of the fiber product are improved. The method comprises the following process steps: performing polyphenol oxidase treatment on protein fibers, dyeing through acid dyes and performing washing after-treatment, wherein the steps of enzyme treatment and dyeing can be performed in a two bath process or in a one-bath two-step method. The protein fiber modification conditions are mild, the color depth and color fastness of the dyed fiber products are improved, the chroma of dyeing waste liquor is reduced, the dye utilization rate is improved, and the requirements of the protein fiber products on clean dyeing production are met.

Description

technical field [0001] The invention relates to a method for enzymatically improving the color fastness of protein fiber products, in particular to pretreating protein fibers such as silk and wool with polyphenol oxidase to catalyze oxidation pretreatment, and then dyeing with acid dyes to promote the covalent bond between fibers and acid dyes The invention relates to a method for improving the color fastness of fiber products, which belongs to the field of textile biotechnology. Background technique [0002] Acid dyes have many advantages such as bright colors, complete chromatograms, and good level dyeing properties, and are widely used in dyeing animal hairs such as silk and wool. Since most acid dyes have a small molecular weight, the hydrogen bond between the dye and the fiber and the Van der Waals force are weak, so in order to improve the dyeing depth, it is necessary to add acid to promote the dyeing, so that the amino group on the protein fiber is ionized and then r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M16/00D06P1/39D06P1/673D06P5/02D06P3/06D06P3/16D06P5/22D06M101/12
Inventor 王平崔莉袁久刚范雪荣王强耿玥
Owner 无锡协新毛纺织股份有限公司
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