Saltless dyeing method for fabric modified by cationic polymer

A cationic polymer, salt-free dyeing technology, applied in the direction of dyeing, textile and paper making, etc., can solve the problems of fiber leveling, uncontrollable color light, large fiber damage, etc., and achieve level dyeing and color fastness. Simple and environmentally friendly, solve the effect of uneven dyeing

Active Publication Date: 2017-03-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reported monomeric cationic modifiers have large dosage, high toxicity, and poor stability. The modification treatment needs to be carried out in a strong alkali environment, the fiber damage is large, and the shade becomes dark after dyeing; polymer cationic modifiers Stable in nature, friendly to the environment, and due to its large molecular weight and good directness with fibers, it has the advantages of less dosage, obvious effect of promoting dyeing, and excellent washing fastness
However, the molecular weight of some modifiers is difficult to control, and the treated fibers have problems such as level dyeing, poor penetration, and uncontrollable shade. So far, they have not been widely used.

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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  • Saltless dyeing method for fabric modified by cationic polymer
  • Saltless dyeing method for fabric modified by cationic polymer
  • Saltless dyeing method for fabric modified by cationic polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Dye species: vinyl sulfone type reactive dyes

[0057] (1) Pre-treatment modification process: two dipping and two rolling of the fabric (dipping for 10 minutes, the excess rate of 80%) treatment liquid (2g / L cationic polymer modifier, the bath ratio is 1:10) → 100°C baking for 10 minutes →Wash in cold water and tumble dry.

[0058] (2) Salt-free dyeing process: The modified and unmodified cotton fabrics were immersed in the dyeing bath of Remazol reactive brilliant blue dye 2% (o.w.f.), pH 6-7, liquor ratio 1:10. According to the dyeing temperature process curve ( figure 1 and image 3 ) was dyed, and the apparent depth K / S value, unevenness S and color fastness were measured, and the results are shown in Table 1.

[0059] Table 1

[0060]

Embodiment 2

[0062] Dye species: vinyl sulfone type reactive dyes

[0063] (1) Pre-treatment modification process: two dipping and two rolling of the fabric (dipping for 10 minutes, the scrapping rate is 80%) treatment solution (5g / L cationic polymer modifier, bath ratio is 1:10) → 100°C baking for 5 minutes →Wash in cold water and tumble dry.

[0064] (2) Salt-free dyeing process: The modified and unmodified cotton fabrics were immersed in the dyeing bath of Remazol reactive brilliant blue dye 2% (o.w.f.), pH 6-7, liquor ratio 1:10. According to the dyeing temperature process curve ( figure 2 and image 3 ) was dyed, and the apparent depth K / S value, unevenness S and color fastness were measured, and the results are shown in Table 2.

[0065] Table 2

[0066]

Embodiment 3

[0068] Dye species: vinyl sulfone type reactive dyes

[0069] (1) Pre-treatment modification process: two dipping and two rolling of the fabric (dipping for 2 minutes, the scrapping rate is 80%) treatment solution (5g / L cationic polymer modifier, bath ratio is 1:10) → 120°C baking for 10 minutes →Wash in cold water and tumble dry.

[0070] (2) Salt-free dyeing process: The modified and unmodified cotton fabrics were immersed in the dyeing bath of Remazol reactive red dye 1% (o.w.f.), pH 6-7, liquor ratio 1:10. According to the dyeing temperature process curve ( figure 1 and image 3 ) was dyed, and the apparent depth K / S value, unevenness S and color fastness were measured, and the results are shown in Table 3.

[0071] table 3

[0072]

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PUM

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Abstract

The invention relates to a saltless dyeing method for a fabric modified by a cationic polymer. The method comprises the steps that the fabric is placed in a pretreatment solution to be pretreated; pretreatment includes steeping or padding, baking, cold washing and drying are performed to obtain a modified fabric; the modified fabric is placed into a dye bath, and a dip dyeing technology or padding-rolling-steaming technology is adopted for dyeing to obtain the saltless dyeing fabric. The method is easy and convenient to implement and environmentally friendly; meanwhile, a polymer modifier is low in consumption, easy to recycle and capable of meeting the requirements of energy conservation, emission reduction and environmental friendliness of a dyeing and printing enterprise; the traditional salt dyeing effect can be achieved without any inorganic salt or leveling agent, and the requirements for leveling property and color fastness are met.

Description

technical field [0001] The invention belongs to the field of pretreatment and dyeing of textiles, in particular to a salt-free dyeing method of cationic polymer modified fabrics. Background technique [0002] Cotton fiber is the largest textile fiber in the world, and reactive dyes have become the most widely used cotton dyes because of their simple molecular structure, bright color, complete color spectrum, low cost, and excellent fastness. Since reactive dyes are anionic dyes, and cotton fibers are negatively charged in the dyeing bath, there is electrostatic repulsion between dyes and fibers during the dyeing process. Therefore, a large amount of inorganic salts need to be added to promote dyeing in the traditional dyeing process to improve the dye uptake rate and Color fixing rate. After dyeing, these inorganic salts remain in the dyeing wastewater and are difficult to degrade, causing serious environmental pollution. At present, these inorganic salts are difficult to ...

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): D06P1/38D06P1/52D06P3/66D06P1/96D06P5/02D06P1/673C08F120/34C08F8/44
CPCC08F8/44C08F120/34C08F2438/01C08F2500/03D06P1/38D06P1/5257D06P1/6735D06P1/67366D06P1/96D06P3/66D06P5/02
Inventor 蔡再生王俊王翠翠阚逸青
Owner DONGHUA UNIV
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