Cotton fiber gray fabric modifying and dyeing method

A dyeing method and cotton fiber technology, applied in the field of cotton fabric dyeing, can solve the problems that the dyeing rate can only reach about 80%, the discharge of sewage is large, and the concentration of residual liquid is high. simple effect

Inactive Publication Date: 2019-02-19
NINGBO GUANG YUAN FABRIC
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As one of the most widely used fiber materials in textiles, cotton is usually dyed with reactive dyes. The most widely used dyeing process of medium-temperature reactive dyes is to fix the color at 60°C. A large amount of salt (yuanming powder) and Alkali is used to promote dyeing and color fixation. The process takes a long time, and the dyeing rate can only reach about 80%. There are a lot of floating colors on the surface of the fiber after dyeing, and the concentration of the residual liquid is high. Soaping and washing treatment, the discharge of sewage is large, the treatment is also difficult, and the cost is high, which brings great pressure to environmental governance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Cotton fiber gray fabric modifying and dyeing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) After scouring the cotton fiber gray cloth, add 1.5g / L refining enzyme 301L (Novozymes (China) Biotechnology Co., Ltd.), 8g / L biological modifier AS (Changzhou Meisheng Biotechnology Co., Ltd.), Among them, the bath ratio of cotton fiber gray cloth is 1:8, and the temperature is raised to 60°C for 30 minutes at a heating rate of 2°C / min. The modified cotton fiber gray cloth is obtained. The color fastness can meet the conventional fastness requirements, and the soaping fastness is also good. Can reach level 4 or higher.

[0025] (2) Wash the modified cotton fiber gray cloth obtained in step (1) for 10 minutes, add a blue medium-temperature reactive dye (concentration is 2% owf), heat up to 50 ° C and dye for 60 minutes, and the dyeing bath ratio is 1:6 , drain, then wash with water for 10 minutes, add color-fixing agent DS-7128 (Shanghai Desang Chemical Co., Ltd.) to fix the color for 10 minutes at 60°C to improve the fastness to wet treatment, wash with water for 1...

Embodiment 2

[0027] (1) After scouring the cotton fiber gray cloth, add 1.5g / L refining enzyme 301L (Novozymes (China) Biotechnology Co., Ltd.), 10g / L biological modifier AS (Changzhou Meisheng Biotechnology Co., Ltd.), Among them, the bath ratio of cotton fiber gray cloth is 1:8, and the temperature is raised to 60°C at a heating rate of 2°C / min for modification treatment for 30 minutes to obtain a modified cotton fiber gray cloth.

[0028] (2) Wash the modified cotton fiber gray cloth obtained in step (1) for 10 min, add red medium temperature reactive dye (concentration is 1.5% owf), heat up to 40° C. and dye for 45 min, the dyeing bath ratio is 1:6, Drain, then wash with water for 10 minutes, and soften for 10 minutes to obtain red cotton fiber dyed cloth with a dye uptake rate of over 98%.

Embodiment 3

[0030] (1) After scouring the cotton fiber gray cloth, add 1.5g / L refining enzyme 301L (Novozymes (China) Biotechnology Co., Ltd.), 10g / L biological modifier AS (Changzhou Meisheng Biotechnology Co., Ltd.), Among them, the bath ratio of cotton fiber gray cloth is 1:8, and the temperature is raised to 60°C at a heating rate of 2°C / min for modification treatment for 30 minutes to obtain a modified cotton fiber gray cloth.

[0031] (2) Wash the modified cotton fiber gray cloth that step (1) obtains for 10 min, add a yellow medium-temperature reactive dye (concentration is 1.5% owf), heat up to 40° C. and dye for 45 min, the dyeing bath ratio is 1:6, Drain, then wash with water for 10 minutes, and soften for 10 minutes to obtain yellow cotton fiber dyed cloth with a dye uptake rate of over 98%.

[0032] Three kinds of color cotton fiber dyed cloths that embodiment 1~3 obtain are detected, and detection result is as shown in table 1:

[0033] Table 1 Example 1~3 three kinds of col...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a cotton fiber gray fabric modifying and dyeing method. The method includes the steps of scouring a cotton fiber gray fabric, adding an enzyme and a biological modifying agentfor modification to obtain a modified cotton fiber gray fabric, washing the gray fabric with water, adding a light-color or neutral-color active dye for dyeing, conducting washing and softening to obtain a light-color or neutral-color cotton fabric dyed fabric, or adding a deep-color active dye for dyeing, conducting washing, adding a color fixing agent for color fixing, and then conducting washing and softening to obtain a deep-color cotton fiber dyed fabric. By means of the method, the cotton fiber gray fabric is refined and modified, fiber cationization is achieved, the affinity between fiber and dye molecules is increased, operation is simple, efficiency is improved, the dyeing rate reaches 90% or above, no soup washing is needed after dyeing, no salt or alkali needs to be added in dyeing for dyeing promoting, dyeing wastewater can be directly recycled, and zero emission is realized.

Description

technical field [0001] The invention belongs to the technical field of cotton fabric dyeing, in particular to a modified dyeing method for cotton fiber gray cloth. Background technique [0002] The current environmental protection situation is becoming increasingly severe. The cost of raw materials such as dyeing and chemical auxiliaries has risen sharply. The traditional textile industry is struggling. Efficiency and pollution reduction have become an urgent task for the industry. [0003] As one of the most widely used fiber materials in textiles, cotton is usually dyed with reactive dyes. The most widely used dyeing process of medium temperature reactive dyes is to fix the color at 60°C. A large amount of salt (yuanming powder) and Alkali is used to promote dyeing and color fixation. The process takes a long time, and the dyeing rate can only reach about 80%. After dyeing, there are a lot of floating colors on the surface of the fiber, and the concentration of residual l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/38D06P1/44D06P3/66D06P5/02
CPCD06P1/38D06P1/445D06P3/66D06P5/02
Inventor 傅红平毛乐意
Owner NINGBO GUANG YUAN FABRIC
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