Whitening and cationic modification method based on one-bath two-stage process and application

A cationic and cationic etherification agent technology, applied in the field of printing and dyeing, can solve the problems of affecting the dyeing effect of fibers, increasing the burden of environmental protection treatment, poor color fastness of dyeing, etc., and achieve the effect of improving dyeing effect, good dyeing effect and reducing content

Active Publication Date: 2019-08-16
MELEPHANT SUSTAINABILITY TECH HANGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of textile technology and the continuous emergence of new textile materials, there are more and more colors of dyes. Some fibers have background colors. Before dyeing, bleaching is often required. The bleaching effect is poor, which will directly affect the dyeing effect of fibers. especially

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051] Example 1

[0052] The whitening and modification of cotton fabric in this embodiment specifically includes the following steps:

[0053] (1) Add fiber and fabric in 40℃ water, add 15g / L sodium percarbonate, then add 2g / L sodium hydroxide, adjust pH=11-12, after heating to 70℃ at a rate of 3℃ / min , Add 15g / L of sodium percarbonate for whitening;

[0054] (2) After whitening, add 20g / L of 3-chloro-2-hydroxypropyltrimethylammonium chloride for modification. After cooling to 40℃, add oxalic acid with a mass percentage of 1%, and then After heating to 60°C at a rate of 3°C / min, after neutralization and deoxygenation, the whitening and cationic modification of the fabric is completed.

Example Embodiment

[0055] Example 2

[0056] The whitening and modification of the hemp cloth in this embodiment specifically includes the following steps:

[0057] (1) Add fibers and fabrics, 15g / L sodium percarbonate, and 1.5g / L sodium hydroxide in 38℃ water, adjust pH=11-12, heat up to 68℃ at a rate of 3.5℃ / min Then, add 15g / L of sodium percarbonate for whitening;

[0058] (2) After whitening, add 18g / L of 3-chloro-2-hydroxypropyltrimethylammonium chloride for modification. After cooling to 38°C, add oxalic acid with a mass percentage of 1.5%, and then After heating up to 58°C at a rate of 3.5°C / min, after neutralization and deoxygenation, the whitening and cationic modification of the fabric is completed.

Example Embodiment

[0059] Example 3

[0060] The whitening and modification of cotton fabric in this embodiment specifically includes the following steps:

[0061] (1) Add fiber and fabric in 42℃ water, add 15g / L sodium percarbonate, then add 2g / L sodium hydroxide, adjust pH=11.5, heat up to 68℃ at a rate of 4℃ / min, add 20g / L sodium percarbonate for whitening;

[0062] (2) After whitening, add 22g / L of 3-chloro-2-hydroxypropyltrimethylammonium chloride for modification. After cooling to 42°C, add oxalic acid with a mass percentage of 1%, and then After heating to 62°C at a rate of 4°C / min, after neutralization and deoxygenation, the whitening and cationic modification of the fabric is completed.

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PUM

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Abstract

The invention provides a whitening and cationic modification method based on a one-bath two-stage process and an application. The method comprises following steps: fiber and fabric are added to water,part of sodium percarbonate is added, then, alkali is added to regulate pH to be 11-12, and after the temperature is increased to 68-72 DEG C, remaining sodium percarbonate is added for whitening; after whitening, a cationic etherifying agent is added for modification, oxalic acid is added after the temperature is reduced to 38-42 DEG C, the temperature is increased to 58-62 DEG C, and whiteningand cationic modification are completed after neutralization and deoxygenization. According to the method, active oxygen free radicals are utilized for performing bleaching and impurity removal on thefiber and the fabric, meanwhile, double bonds in pigment are damaged by means of strong oxidizing property of alkyl free radicals, and therefore, the fiber and the fabric are faded; whiteness of thefabric and the fiber after pretreatment and bleaching can be increased by about 5 degrees. After the cationic modification of the fiber and the fabric, active bases capable of reacting with dye are increased, the dye-uptake and the exhaustion degree of the dye are increased, and the method has the effects of increasing color depth, reducing dyeing wastewater and the like.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing, in particular to a method and application of a one-bath two-step whitening and cationic modification method. Background technique [0002] With the development of textile technology and the continuous emergence of new textile materials, there are more and more colors of dyes. Some fibers have background colors. Before dyeing, bleaching is often required. The bleaching effect is poor, which will directly affect the dyeing effect of fibers. Especially light colored fabric dyes. [0003] Plant fibers and polyester fibers cannot be effectively combined with anionic dyes, so a large amount of dyeing aids and color fixing agents need to be used during dyeing, which increases the burden of environmental protection after dyeing, and the color fastness of dyeing is not good. [0004] In view of this, the present invention is proposed. Contents of the invention [0005] The first object of ...

Claims

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Application Information

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IPC IPC(8): D06L4/13D06P5/00D06P1/66D06P3/60
CPCD06L4/13D06P5/00D06P1/66D06P3/60
Inventor 谢义鸿刘媛媛
Owner MELEPHANT SUSTAINABILITY TECH HANGZHOU CO LTD
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