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A clean dyeing process for cotton textiles

A technology for cotton textiles and textiles, applied in the field of low-salt dyeing technology, which can solve the problems of high investment in low-salt dyeing equipment, inability to realize industrial application, and unclear actual effect, etc., to achieve level dyeing, penetration dyeing, and rubbing fastness Good, reduced dosage

Active Publication Date: 2021-06-08
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, practice has proved that the investment in low-salt dyeing equipment is large and the production efficiency is low, and the actual effect on reducing the amount of salt used in dyeing is not clear, and industrial application cannot be realized in the short term

Method used

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  • A clean dyeing process for cotton textiles
  • A clean dyeing process for cotton textiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1 Clean dyeing process of cotton textiles of the present invention

[0077] Concrete steps for the preparation of the dye modifier in the clean dyeing process of cotton textiles of the present invention:

[0078] S1 amination reaction step, this step reacts alkanolamine and diisocyanate to prepare alkanolamine initial polymer; specifically:

[0079] S11 Put the alkanolamine into the reaction device, and control the temperature at 20-25°C;

[0080] Under stirring in S12, keep the temperature at 25-30°C, add the diisocyanate to S11 within 10 minutes, then keep the temperature at 35-40°C, keep the temperature for 35 minutes, and prepare the alkanolamine primary polymer;

[0081] S2 etherification reaction step, this step reacts the alkanolamine primary polymer with polyether glycol to obtain etherified alkanolamine; specifically:

[0082] Under stirring in S21, maintain the temperature at 50-55°C, add polyether diol to S12 within 10 minutes, then maintain the ...

Embodiment 2

[0099] Embodiment 2 Cotton textile clean dyeing technology and dyeing process thereof of the present invention

[0100] Concrete steps for the preparation of the dye modifier in the clean dyeing technology of cotton textiles of the present invention and its dyeing process:

[0101] S1 amination reaction step, this step reacts alkanolamine and diisocyanate to prepare alkanolamine initial polymer; specifically:

[0102] S11 Put the alkanolamine into the reaction device, and control the temperature at 22-27°C;

[0103] Under stirring in S12, keep the temperature at 27-32°C, add the diisocyanate to S11 within 10 minutes, then keep the temperature at 37-42°C, keep the temperature for 35 minutes, and prepare the alkanolamine primary polymer;

[0104] S2 etherification reaction step, this step reacts the alkanolamine primary polymer with polyether glycol to obtain etherified alkanolamine; specifically:

[0105] Under stirring in S21, maintain the temperature at 53-58°C, add polyeth...

Embodiment 3

[0123] Embodiment 3 Clean dyeing process of cotton textiles of the present invention

[0124] Concrete steps for the preparation of the dye modifier in the clean dyeing technology of cotton textiles of the present invention and its dyeing process:

[0125] S1 amination reaction step, this step reacts alkanolamine and diisocyanate to prepare alkanolamine initial polymer; specifically:

[0126] S11 Put the alkanolamine into the reaction device, and control the temperature at 25-30°C;

[0127] Under stirring in S12, keep the temperature at 30-35°C, add the diisocyanate to S11 within 7 minutes, then keep the temperature at 40-45°C, keep the temperature for 40 minutes, and prepare the alkanolamine primary polymer;

[0128] S2 etherification reaction step, this step reacts the alkanolamine primary polymer with polyether glycol to obtain etherified alkanolamine; specifically:

[0129] Under stirring in S21, maintain the temperature at 55-60°C, add polyether diol to S12 within 7 min...

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Abstract

The invention relates to a clean dyeing process for cotton textiles. The dyeing process does not change the conventional dyeing equipment and dyeing process of cotton textiles, and is easy to implement and control. Compared with the dyeing of cotton textiles with traditional anionic dyes, the dyeing process can reduce the amount of dyeing electrolyte by 40-50%, and the cotton textiles dyed by the clean dyeing process of cotton textiles of the present invention have higher color yield depth, good Dyeing fastness and excellent dyeing reproducibility, can be used for dyeing processing of water-soluble anionic dyes of various cotton fibers and their products, significantly reduce the amount of dyeing electrolyte, shorten the dyeing cycle, protect the environment and save energy and reduce consumption, with good application effect .

Description

technical field [0001] The invention belongs to the field of textile dyeing, and relates to a clean dyeing process for cotton textiles with anionic dyes, in particular to a low-salt dyeing process for cotton textiles with anionic direct dyes or anionic reactive dyes. Background technique [0002] In the current production practice, anionic reactive dyes and direct dyes are the most commonly used dyes for dyeing cotton textiles. In order to fully dye the dyes, it is inevitable to use a large amount of neutral electrolytes. In order to solve the environmental pollution problem caused by the dyeing of cotton fabrics with traditional anionic dyes, the low-salt dyeing technology and process of cotton fabrics with anionic water-soluble dyes have always been the focus of research and development in related fields. At present, the low-salt clean dyeing technology of anionic water-soluble dyes on cotton fabrics is mainly divided into the following four types: low-salt anionic dyes, c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/38D06P3/66D06P1/52
CPCD06P1/38D06P1/5285D06P3/66
Inventor 权衡陈昕倪丽杰毕曙光李时伟周文师刘挺刘迪雅
Owner WUHAN TEXTILE UNIV