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A kind of disperse dye dyeing method of treating cotton fabric by water-based polyurethane

A water-based polyurethane and disperse dye technology, applied in the direction of dyeing, fiber treatment, plant fiber, etc., can solve the problems of low water solubility, difficult to dye with disperse dyes, no affinity for cotton fibers, etc. Performance, Environmentally Friendly Effects

Active Publication Date: 2022-07-12
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because there are more hydrophilic hydroxyl groups on cotton fibers, and disperse dyes are non-ionic dyes with low water solubility and strong hydrophobicity, they have no affinity for cotton fibers, so it is difficult to use disperse dyes to dye them.

Method used

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  • A kind of disperse dye dyeing method of treating cotton fabric by water-based polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The cotton fabric was dipped and rolled in the finishing solution twice, so that the liquid carrying rate was 75%, dried at 80°C for 5 minutes, and baked at 160°C for 2 minutes, and then the treated cotton fabric was taken out and washed with water and dried at 80°C. In the finishing solution, the concentration of water-based polyurethane (number average molecular weight is 10000) is 70g / L, the concentration of penetrant NR is 0.6g / L, and the concentration of tetraisobutyl titanate is 25g / L.

[0047] Take 10 parts by weight of the pretreated cotton fabric and add it to the disperse dye formulation, the disperse dye formulation contains 0.2 parts by weight of disperse red dye and 0.02 part by weight of levelling agent, and the bath ratio is 1:20, and the starting time is 1:20. The dyeing temperature is 40°C, and then the temperature is increased at a heating rate of 2°C / min. After the temperature reaches 90°C, the dyeing is incubated for 40 minutes, and then cooled at a c...

Embodiment 2

[0049] The cotton fabric was dipped and rolled in the finishing solution twice, so that the liquid carrying rate was 75%, dried at 80°C for 5 minutes, and baked at 160°C for 2 minutes, and then the treated cotton fabric was taken out and washed with water and dried at 80°C. In the finishing solution, the concentration of water-based polyurethane (number average molecular weight is 8000) is 60g / L, the concentration of penetrant NR is 0.4g / L, and the concentration of zinc naphthenate is 30g / L.

[0050] Get 10 parts by weight of the pretreated cotton fabric and add it to the disperse dye formulation, which contains 0.4 parts by weight of disperse red dye and 0.03 part by weight of leveling agent, and the bath ratio is 1:50. The dyeing temperature is 30°C, and then the temperature is increased at a heating rate of 1°C / min. After the temperature reaches 70°C, the dyeing is maintained for 80 minutes, and then cooled at a cooling rate of 1°C / min. After cooling to 40°C, the cloth is re...

Embodiment 3

[0052] The cotton fabric was dipped and rolled in the finishing solution twice, so that the liquid carrying rate was 75%, dried at 80°C for 5 minutes, and baked at 160°C for 2 minutes, and then the treated cotton fabric was taken out and washed with water and dried at 80°C. In the finishing solution, the concentration of water-based polyurethane (number average molecular weight is 15000) is 80g / L, the concentration of penetrant NR is 0.8g / L, and the concentration of iron octoate is 20g / L.

[0053] Take 10 parts by weight of the pretreated cotton fabric and add it to the disperse dye preparation, which contains 0.5 parts by weight of disperse red dye and 0.015 parts by weight of leveling agent, and the bath ratio is 1:10, and the starting time is 1:10. The dyeing temperature is 60°C, and then the temperature is raised at a heating rate of 1.5°C / min. After the temperature reaches 100°C, the dyeing is maintained for 40 minutes, and then cooled at a cooling rate of 1.5°C / min. After...

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Abstract

The invention relates to the technical field of textiles, and discloses a disperse dye dyeing method for treating cotton fabrics with water-based polyurethane. The method comprises the following steps: (1) no-iron pretreatment: using water-based polyurethane as a no-iron finishing agent to perform no-ironing treatment on cotton fabrics. Ironing finishing, the number-average molecular weight of the water-based polyurethane is 3000-50000; (2) disperse dye dyeing: the cotton fabric obtained after the pretreatment in step (1) is dyed with disperse dye by using a disperse dye formulation. The method can effectively use disperse dyes to dye cotton fabrics, has simple process, low cost of sewage treatment in the production process, and is environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a disperse dye dyeing method for treating cotton fabrics with water-based polyurethane. Background technique [0002] Pure cotton fabrics are made of cotton as raw materials and produced by textile technology. They have the characteristics of moisture absorption, moisture retention, heat resistance, alkali resistance and hygiene. Pure cotton fabrics are comfortable and skin-friendly, and are widely favored by people, especially in infant clothing. [0003] In the existing dyeing field, the most common method for cotton fabrics is to use reactive dyes to dye them, but in the process of dyeing with reactive dyes, in order to make the dyes have sufficient affinity for cotton fibers, a large amount of electrolytes (salts) must be added. At the same time, a large amount of alkali needs to be added to provide the required alkaline environment for dyeing, which greatly increases the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P3/60D06M15/564D06P1/00D06P1/16D06P1/44D06P1/52D06P5/22D06M101/06
CPCD06P3/6033D06P1/16D06P1/0032D06P1/445D06P1/5285D06P5/22D06M15/564D06M2101/06D06M2200/20
Inventor 王运利郭恒徐卫林胡金榜张稳黄宏博韩宗保
Owner WUHAN TEXTILE UNIV
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