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Method and application of one-bath two-step whitening and cationic modification

A cationic and cationic etherification agent technology, applied in the field of printing and dyeing, can solve the problems of increasing the burden of environmental protection treatment, affecting the effect of fiber dyeing, and poor bleaching effect, so as to achieve the effect of improving dyeing effect, good dyeing effect and reducing content

Active Publication Date: 2022-02-08
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 light colored fabric dyes
[0003] Plant fibers and polyester fibers cannot be effectively combined with anionic dyes, so a large amount of dyeing auxiliaries 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The present embodiment carries out whitening and modification to cotton cloth, specifically comprises the following steps:

[0053] (1) Add fibers and fabrics to 40°C water, add 15g / L sodium percarbonate, then add 2g / L sodium hydroxide, adjust pH=11-12, and heat up to 70°C at a speed of 3°C / min , adding 15g / L of sodium percarbonate for whitening;

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

Embodiment 2

[0056] This embodiment whitens and modifies the linen cloth, specifically including the following steps:

[0057] (1) Add fibers and fabrics, 15g / L sodium percarbonate to 38°C water, then add 1.5g / L sodium hydroxide to adjust pH=11-12, and heat up to 68°C at a speed of 3.5°C / min Finally, add the sodium percarbonate of 15g / L, carry out whitening;

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

Embodiment 3

[0060] The present embodiment carries out whitening and modification to cotton cloth, specifically comprises the following steps:

[0061] (1) Add fibers and fabrics to 42°C water, add 15g / L sodium percarbonate, then add 2g / L sodium hydroxide, adjust pH=11.5, heat up to 68°C at a speed of 4°C / min, then add 20g / L of sodium percarbonate for whitening;

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

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Abstract

The method and application of a one-bath two-step method for whitening and cationic modification provided by the present invention include the following steps: adding fibers and fabrics to water, adding part of sodium percarbonate, adding alkali to adjust pH=11-12, and raising the temperature After reaching 68-72°C, add the remaining sodium percarbonate to whiten; And, after oxygen removal, complete whitening and cationic modification. The method uses active oxygen free radicals to bleach and remove impurities from fibers and fabrics, and at the same time destroys double bonds in pigments through the strong oxidizing properties of hydrocarbon radicals to make them fade. After pretreatment and bleaching of fabrics and fibers, the whiteness can be increased by about 5 degrees. After cationic modification of fibers and fabrics, active bases that can react with dyes are added, the dye uptake rate and exhaustion rate of dyes are improved, and the color depth is improved, and dyeing wastewater is reduced.

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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Patent Type & Authority Patents(China)
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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