Reactive dye dyeing method for cotton fabric

A technology of reactive dyes and dyeing methods, which is applied in the field of reactive dye liquid paraffin bath dyeing, can solve the problems of low utilization rate of dyestuffs, difficult treatment, and high salt content, and achieves significant waste water discharge, increased utilization rate, and high dyeing rate. Effect

Active Publication Date: 2017-01-18
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a reactive dye dyeing method for cotton fabrics, aiming at the problems of low dye utilization rate, high chroma in wastewater, high salt content, high alkalinity and difficult treatment in the reactive dye water bath dyeing of cotton fabrics. , the present invention selects liquid paraffin instead of water as the reactive dye dyeing medium, and provides a cotton fabric reactive dye dyeing method that does not need neutral salt to promote dyeing, has high dye uptake rate and high fixation rate in the dyeing process

Method used

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  • Reactive dye dyeing method for cotton fabric
  • Reactive dye dyeing method for cotton fabric
  • Reactive dye dyeing method for cotton fabric

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: (active black KN-B)

[0031] 1. Dyeing formula and conditions:

[0032] Reactive dye (reactive black KN-B): 4% (o.w.f);

[0033] Sodium carbonate concentration: 40g / L;

[0034] Cotton fabric weight: 1g;

[0035] Squeezing rate: 150%;

[0036] The mass ratio of cotton fabric to liquid paraffin: 1:40;

[0037] Table 1 Embodiment 1 used liquid paraffin related parameters

[0038]

[0039] 2. Dyeing process:

[0040] (1) Pretreatment of cotton fiber: Weigh 1 g of cotton fabric and put it into a sodium carbonate solution with a concentration of 40 g / L, with a bath ratio of 1:50. After soaking for 30 minutes at normal temperature, squeeze out the liquid, control the cotton fabric's liquid squeeze rate to 150%, and prepare for dyeing.

[0041] (2) Dyeing: According to the ratio, reactive dyes and liquid paraffin are mixed to form a reactive dye / liquid paraffin suspension dispersion, and the cotton fabric obtained in step (1) is put into the reactive dye...

Embodiment 2

[0044] Embodiment 2: (active black KN-B)

[0045] 1. Dyeing formula:

[0046] Reactive dye (reactive black KN-B): 2% (o.w.f);

[0047] Sodium carbonate concentration: 40g / L;

[0048] Cotton fabric weight: 1g;

[0049] The mass ratio of cotton fabric to liquid paraffin: 1:20;

[0050] Squeezing rate: 200%;

[0051] Liquid paraffin kind is with embodiment 1

[0052] 2, dyeing process: adopt above-mentioned dyeing formula, concrete dyeing process is the same as embodiment 1, difference is: in step (2), dyestuff is used m 活性染料 :m 水 = Dissolve in water at 1:5, then add liquid paraffin, shake and shake well, then put the cotton fabric obtained in step (1) into the dyeing solution at room temperature, and dye for 20 minutes; in step (3), the mixture system is heated to 70°C, keep warm for 50min.

Embodiment 3

[0053] Embodiment 3: (active black KN-B)

[0054] 1. Dyeing formula:

[0055] Reactive dye (reactive black KN-B): 2% (o.w.f);

[0056] Sodium carbonate concentration: 10g / L;

[0057] Cotton fabric weight: 1g;

[0058] Squeezing rate: 100%;

[0059] The mass ratio of cotton fabric to liquid paraffin: 1:60;

[0060] Liquid paraffin kind is with embodiment 1

[0061] 2, dyeing process flow: adopt above-mentioned dyeing formula, concrete dyeing process flow is the same as embodiment 2, difference is: in step (2), dyestuff is used m 活性染料 :m 水 =1:10 dissolved in water, then add liquid paraffin, shake well, then put the cotton fabric obtained in step (1) into the dye solution at room temperature, and dye for 40 minutes; in step (3), the mixture system is heated to 50°C, keep warm for 50min.

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Abstract

The invention discloses a reactive dye dyeing method for a cotton fabric. The reactive dye dyeing method comprises the following steps of 1 pretreating of the cotton fabric, wherein the cotton fabric is padded in a sodium carbonate solution with the concentration of 10-100 g/L, the pickup rate is controlled to be 100%-200%, and dyeing is prepared; 2 dyeing, wherein dye liquor is prepared by utilizing liquid paraffin as a continuous phase medium for dyeing, and the cotton fabric obtained in the step 1 is placed into reactive dye/a liquid paraffin bath (dye liquor) at room temperature to be dyed for 20-60 min; 3 fixation, wherein the mixture system obtained in the step 2 is heated to 50 DEG C to 100 DEG C, and heat preservation is conducted for 20-50 min; 4 soap boiling, wherein the cotton fabric is taken out, and soaping is conducted to remove the unfixed dye on the surface of the cotton fabric. According to the reactive dye dyeing method for the cotton fabric, the liquid paraffin is selected to replace water to serve as the reactive dye dyeing medium, neutral salt is not needed for accelerating dyeing in the dyeing process, the dyeing rate of the dye is high, and the fixation rate is high.

Description

technical field [0001] The invention belongs to the technical field of dyeing and finishing, in particular to a liquid paraffin bath dyeing method of cotton fabrics with reactive dyes. Background technique [0002] Cellulose fiber is the textile fiber with the largest output in the world. Among them, cotton fiber, as a natural cellulose fiber, is widely used due to its good water absorption, hygroscopicity, easy dyeing, soft hand feeling, moderate strength, and comfortable wearing. in production and life. [0003] Reactive dyes have become the main choice for cellulose fiber printing and dyeing due to their bright color, complete chromatogram, easy application, low cost and excellent fastness. However, the precursors of reactive dyes are usually acid dyes, which have low affinity with cotton fibers, low dye uptake, and electrostatic repulsion between fibers and dyes. A large amount of neutral electrolytes need to be added during conventional water-bath dyeing to promote dye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/38D06P1/673D06P1/00D06P1/81D06P1/90D06P3/66D06P5/02D06P5/10
CPCD06P1/00D06P1/38D06P1/6735D06P1/81D06P1/90D06P3/66D06P5/02D06P5/10D06P2001/905
Inventor 邵建中朱振旭刘今强周岚王莉莉
Owner ZHEJIANG SCI-TECH UNIV
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