Low-temperature bleaching method of pure cotton or cotton-containing fabric

A cotton fabric, low temperature technology, applied in the field of low temperature bleaching, can solve the problems of high energy consumption, fiber damage, low bleaching efficiency, etc., and achieve the effects of reducing fabric damage, improving fabric whiteness, and improving bleaching effect.

Active Publication Date: 2014-12-24
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the severe bleaching reaction conditions of traditional oxidants in the current bleaching process of pure cotton and cotton-containing blended fabrics, serious damage to fibers, low bleaching efficiency, large energy consum

Method used

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  • Low-temperature bleaching method of pure cotton or cotton-containing fabric
  • Low-temperature bleaching method of pure cotton or cotton-containing fabric
  • Low-temperature bleaching method of pure cotton or cotton-containing fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A low-temperature bleaching method for pure cotton or cotton-containing fabrics, the process is as follows: add hydrogen peroxide to the bleaching system, and a new type of acyloxy bleaching activator (Shangyu Jiehua Chemical Co., Ltd., the structural formula is ), sodium silicate, sodium carbonate, put the cotton fabric into the bleach solution at a bath ratio of 1:30, raise the temperature to 30°C at a heating rate of 2°C / min, keep it warm for 60min, and finally wash and dry the bleached fabric.

[0016] The bleach prescription is as follows:

[0017]

Embodiment 2

[0019] A low-temperature bleaching method for pure cotton or cotton-containing fabrics, the process is as follows: add hydrogen peroxide to the bleaching system, and a new type of acyloxy bleaching activator (Shangyu Jiehua Chemical Co., Ltd., the structural formula is ), sodium silicate, sodium bicarbonate, put the cotton fabric into the bleach solution at a bath ratio of 1:50, raise the temperature to 30°C at a heating rate of 2°C / min, keep it warm for 60min, and finally wash and dry the bleached fabric.

[0020] The bleach prescription is as follows:

[0021]

Embodiment 3

[0023] A low-temperature bleaching method for pure cotton or cotton-containing fabrics, the process is as follows: add hydrogen peroxide to the bleaching system, and a new type of acyloxy bleaching activator (Shangyu Jiehua Chemical Co., Ltd., the structural formula is ), sodium phytate, sodium carbonate and sodium carbonate, put the cotton fabric into the bleach solution at a bath ratio of 1:40, raise the temperature to 50°C at a heating rate of 2°C / min, keep it warm for 60min, and finally wash and dry the bleached fabric .

[0024] The bleach prescription is as follows:

[0025]

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Abstract

The invention discloses a low-temperature bleaching method of pure cotton or cotton-containing fabric. The method comprises the steps of adding 1-4g/L of a bleach activator, 3-10g/L of hydrogen peroxide, 2-6g/L of a bleaching stabilizing agent and 0.5-5g/L of a pH regulator into a bleaching system; putting the unbleached pure cotton or cotton-containing fabric into a dye bath according to the bath ratio of 1: (10-100), heating up to 30-70 DEG C at the speed of 0.5-3 DEG C/ minute, carrying out heat preservation for 20-90 minutes, finally, washing the bleached fabric with water, and drying or airing. The novel acyloxy bleach activator is added into a breaching system of the pure cotton or cotton-containing fabric, so that the breaching system can be implemented at a low temperature, and the bleaching effect of an oxidizing agent is improved; compared with the traditional oxygen bleaching system, the method is capable of reducing the damage to the fabric while improving the whiteness of the fabric.

Description

technical field [0001] The invention belongs to the technical field of dyeing and finishing, and relates to a low-temperature bleaching method for pure cotton or cotton-containing fabrics. The oxidative bleaching method is suitable for low-temperature bleaching of pure cotton and cotton-containing blended fabrics. Background technique [0002] Cotton fiber is the most important natural textile raw material. Cotton fiber has the advantages of good water absorption, excellent wearing performance and easy dyeing. Its market share accounts for 50% of the total fiber consumption. However, natural cotton fibers contain natural yellow impurities, and the pigments are mainly derived from some compounds containing chromophoric groups, which reduces the inherent white appearance of cotton fibers. In addition, cotton fabrics in a relaxed state are also easily polluted by lubricating oil during processing. These impurities usually need to be removed in the bleaching process to give cott...

Claims

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Application Information

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IPC IPC(8): D06L3/02D06L4/12D06L4/13
Inventor 曹机良孟春丽张晓静魏媛许志忠程献伟
Owner HENAN INST OF ENG
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