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Disperse-dye dyeing method for treatment of cotton fabrics through waterborne 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 no affinity for cotton fibers, difficult to dye with disperse dyes, low water solubility, etc., to achieve environmental friendliness and improve non-iron performance. , the effect of simple production process

Active Publication Date: 2020-03-17
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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  • Disperse-dye dyeing method for treatment of cotton fabrics through waterborne polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Soak the cotton fabric twice in the finishing solution, so that the liquid retention rate is 75%, dry at 80°C for 5 minutes, bake at 160°C for 2 minutes, then take out the treated cotton fabric, wash it with water and dry it at 80°C. In the finishing solution, the concentration of aqueous 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] Get 10 parts by weight of the above-mentioned pretreated cotton fabrics and add them in the disperse dye preparation, which contains 0.2 parts by weight of disperse red dye and 0.02 parts by weight of leveling agent, and the bath ratio is 1:20. The dyeing temperature is 40°C, and then the temperature is raised at a heating rate of 2°C / min. After the temperature reaches 90°C, the temperature is kept for 40 minutes, and then the temperature is lowered at a cooling rate of 2°C / min. After cooling down to 50°C, the c...

Embodiment 2

[0049] Soak the cotton fabric twice in the finishing solution, so that the liquid retention rate is 75%, dry at 80°C for 5 minutes, bake at 160°C for 2 minutes, then take out the treated cotton fabric, wash it with water and dry it at 80°C. In the finishing solution, the concentration of aqueous 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 cotton fabric after the above pretreatment and add in the disperse dye preparation, which contains 0.4 part 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 raised at a heating rate of 1°C / min. After the temperature reaches 70°C, the temperature is kept for 80 minutes, and then the temperature is lowered at a cooling rate of 1°C / min. After cooling down to 40°C, the fabric is rele...

Embodiment 3

[0052] Soak the cotton fabric twice in the finishing solution, so that the liquid retention rate is 75%, dry at 80°C for 5 minutes, bake at 160°C for 2 minutes, then take out the treated cotton fabric, wash it with water and dry it 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] Get 10 parts by weight of the cotton fabric after the above pretreatment and add in the disperse dye preparation, which contains 0.5 part by weight of disperse red dye and 0.015 part by weight of leveling agent, and the bath ratio 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 kept for 40 minutes, and then the temperature is lowered at a cooling rate of 1.5°C / min. After cooling down to 50°C, the cloth is rel...

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Abstract

The invention relates to the technical field of textiles and discloses a disperse-dye dyeing method for treatment of cotton fabrics through waterborne polyurethane. The method includes steps: (1) non-ironing pretreatment, to be specific, subjecting the cotton fabrics to non-ironing finishing by using waterborne polyurethane as a non-ironing finishing agent, wherein the number-average molecular weight of waterborne polyurethane is 3000-50000; (2) disperse-dye dyeing, to be specific, performing disperse-dye dyeing on the cotton fabrics obtained after pretreatment in the step (1) by using a disperse dye preparation. The method has advantages that the cotton fabrics can be dyed with disperse dyes effectively, a process is simple, and a production process is low in sewage treatment cost and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a method for dyeing cotton fabrics with disperse dyes by water-based polyurethane. Background technique [0002] Pure cotton fabric is made of cotton as raw material and produced by textile technology, which has the characteristics of moisture absorption, moisturizing, heat resistance, alkali resistance, and hygiene. Pure cotton fabrics are comfortable to wear and have good skin-friendly properties, and are widely favored by people, especially in infant clothing, which is regarded as the safest fabric. [0003] In the existing dyeing field, it is most common to use reactive dyes to dye cotton fabrics, but in the process of dyeing 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, it is also necessary to add a large amount of alkali to provide the required alkaline environm...

Claims

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Application Information

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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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