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Pretreatment process for cotton fabric bleaching

A treatment process and technology for cotton fabrics, applied in the field of cotton fabric bleaching pretreatment process, can solve the problems of high energy consumption, rough hand feel, and fabric strength damage, and achieve low bleaching temperature, controllable temperature and time, and small fiber damage. Effect

Inactive Publication Date: 2017-08-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is usually carried out under high temperature and strong alkali conditions, which has disadvantages such as high energy consumption, serious damage to fabric strength, and rough hand feeling.

Method used

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  • Pretreatment process for cotton fabric bleaching
  • Pretreatment process for cotton fabric bleaching
  • Pretreatment process for cotton fabric bleaching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of cotton fabric bleaching pretreatment process, concrete steps are:

[0021] (1) preparation contains the solution of bleaching catalyst and hydrogen peroxide, and bleaching catalyst is zirconium cobalt phosphate, and concentration is 1g / L, H 2 o 2 The content is 8g / L;

[0022] (2) Put the desized cotton fabric into the above-mentioned solution containing bleach catalyst and hydrogen peroxide at a bath ratio of 20:1, bleach at 80° C. for 30 minutes, take out the fabric, then wash and dry it.

[0023]

Embodiment 2

[0025] A kind of cotton fabric bleaching pretreatment process, concrete steps are:

[0026] (1) preparation contains the solution of bleaching catalyst and hydrogen peroxide, and bleaching catalyst is zirconium nickel phosphate, and concentration is 3g / L, H 2 o 2 The content is 5g / L;

[0027] (2) Put the desized cotton fabric into the above-mentioned solution containing bleach catalyst and hydrogen peroxide at a liquor ratio of 30:1, bleach at 70° C. for 45 minutes, take out the fabric, then wash and dry it.

[0028]

Embodiment 3

[0030] A kind of cotton fabric bleaching pretreatment process, concrete steps are:

[0031] (1) preparation contains the solution of bleaching catalyst and hydrogen peroxide, and bleaching catalyst is zirconium copper phosphate, and concentration is 5g / L, H 2 o 2 The content is 6g / L;

[0032] (2) Put the desized cotton fabric into the above-mentioned solution containing bleach catalyst and hydrogen peroxide at a liquor ratio of 10:1, bleach at 60° C. for 60 minutes, take out the fabric, then wash and dry it.

[0033]

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Abstract

The invention provides a pretreatment process for cotton fabric bleaching. The pretreatment process for the cotton fabric bleaching is characterized in comprising the following steps: preparing a solution containing bleach catalysts and hydrogen peroxide, putting unbleached cotton or cotton-containing fabrics into the solution containing the bleach catalysts and hydrogen peroxide according to a certain bath ratio, bleaching the fabrics for a certain time under a certain temperature, taking out the fabrics, washing the fabrics and drying the fabrics; the bleach catalysts are at least one of non-water-soluble zirconium phosphate double salts with a general structural formula of MZr (PO4) 2, wherein M is Co<2+>, Ni<2+> and Cu<2+>. The pretreatment process for the cotton fabric bleaching is good in bleaching effects, no need for strong alkali conditions, and cannot cause serious damage to fabric fibers. The zirconium phosphate double salt is low in water solubility, non-toxic and harmless to the environment, easy to separate, conducive to green production, and good in application prospects.

Description

technical field [0001] The invention relates to a cotton fabric bleaching pretreatment process, which is suitable for low-temperature and neutral bleaching pretreatment processing of cotton fabrics or cotton blended fabrics. Background technique [0002] At present, the vast majority of printing and dyeing enterprises use a one-bath refining hydrogen peroxide bleaching process for the scouring bleaching and dyeing of cotton fabrics. This process is usually carried out under high temperature and strong alkali conditions, which has disadvantages such as high energy consumption, serious damage to fabric strength, and rough hand feeling. Adding an activator or catalyst to the hydrogen peroxide bleaching bath can promote the effective decomposition of hydrogen peroxide, which can effectively reduce the bleaching temperature and improve the bleaching effect, and is also conducive to reducing the dependence of the bleaching system on strong alkali conditions, so it is the main rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L4/13D06L4/12
Inventor 邢彦军胡晓霞程红玉赵林
Owner DONGHUA UNIV
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