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A kind of preparation method of special white cotton fabric

A technology of extra white cotton fabric and cotton fabric, which is applied in the field of extra white cotton fabric preparation, which can solve the problems of high energy consumption, strong alkalinity of wastewater, fiber damage, etc., and achieve excellent hair effect, small strength damage, and product stability Good results

Active Publication Date: 2022-07-19
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional bleaching process has a good treatment effect, it has the following disadvantages: (1) The wastewater is highly alkaline and consumes a lot of energy; (2) Fiber damage is easily caused under high temperature and high alkali conditions

Method used

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  • A kind of preparation method of special white cotton fabric
  • A kind of preparation method of special white cotton fabric
  • A kind of preparation method of special white cotton fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The invention provides a preparation method of extra white cotton fabric, and the specific process is as follows:

[0031] (1) Reduction and bleaching section: configure a reduction bleaching working solution, the concentration of sodium borohydride in the reduction bleaching working solution is 25g / L, and the cotton fabric is reduced and bleached for 60min at 90°C.

[0032] (2) Oxidative bleaching section: the concentration of each component in the oxidative bleaching working solution is: percarbonamide 8g / L; peracetic acid 8g / L; 30% hydrogen peroxide 110ml / L; sodium hydroxide 40g / L; sodium pyrophosphate g / L; high-efficiency penetrating agent JFC 4g / L; scouring agent 4g / L; the addition order of each component in this bleaching working solution is: percarbonamide, peracetic acid, sodium pyrophosphate, high-efficiency penetrating agent JFC, scouring agent, NaOH must be added after the above components are added, 30% H 2 O 2 It must be added at the end, and the order of...

Embodiment 2

[0036] The concentration of sodium borohydride determines the whiteness after bleaching, so it is necessary to explore the effect of sodium borohydride concentration on the treatment effect of cotton fabrics.

[0037]With reference to Example 1, the reduction bleaching working solution with a sodium borohydride concentration of 5-45 g / L is used for reduction bleaching, and the remaining conditions remain unchanged. According to GB / T 8424.2-2001 "Approach to Apparatus Evaluation of Relative Whiteness of Textiles", GB / T 3923.1-2013 "Tensile Properties of Textile Fabrics Part 1: Determination of Tensile Strength and Elongation at Break (Strip Method)" and FZ / T01071-2008 "Test method for capillary effect of textiles", the characterization indicators of cotton fabrics after treatment are measured, as shown in Table 1.

[0038] Table 1 Effect of sodium borohydride concentration on cotton fabric treatment effect

[0039] Sodium borohydride concentration / g L -1

Embodiment 3

[0041] The time of reduction bleaching is one of the main factors affecting the whiteness of cotton fabrics, so we need to explore the effect of reduction bleaching time on the treatment effect of cotton fabrics.

[0042] With reference to Example 1, the time required for reduction and bleaching is 45-75 min, and other conditions remain unchanged. According to GB / T 8424.2-2001 "Approach to Apparatus Evaluation of Relative Whiteness of Textiles", GB / T 3923.1-2013 "Tensile Properties of Textile Fabrics Part 1: Determination of Tensile Strength and Elongation at Break (Strip Method)" and FZ / T 01071-2008 "Test method for capillary effect of textiles", the characterization indicators of cotton fabrics after treatment are measured, as shown in Table 2.

[0043] Table 2 Influence of reduction bleaching time on cotton fabric treatment effect

[0044]

[0045]

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Abstract

The invention provides an extra white process treatment method for cotton fabrics, which belongs to the field of fabric pretreatment. In the present invention, low-cost sodium borohydride, percarbonamide, peracetic acid, hydrogen peroxide and sodium hydroxide are used as bleaching assistants, sodium pyrophosphate is added to reduce the ineffective decomposition of hydrogen peroxide, and the use of high-efficiency penetrants can increase the number of assistants In terms of the accessibility of cotton fibers, while obtaining high whiteness cotton fabrics, the fabric strength drop rate is low, and the fabric whiteness can reach more than 90, the strength damage is small, the wool performance is excellent, and there is no fabric yellowing phenomenon. , and the treatment process is simple and reliable.

Description

technical field [0001] The invention relates to a preparation method of extra white cotton fabric, and belongs to the field of fabric pretreatment. Background technique [0002] Due to its advantages of good water absorption, comfortable wearing and easy dyeing, cotton fabrics are widely used, and its market share accounts for 40% of the total global fiber consumption. Untreated cotton fiber contains natural impurities such as pectin, wax, pigment, cottonseed husk, nitrogenous substances, etc., so its cloth surface is yellow, rough in hand, and poor in dyeing performance. After the cotton fabric is scouring, the impurities are obviously reduced and the water absorption performance is improved. However, due to the presence of pigments on the cotton fibers, its appearance does not meet the requirements for consumption. Therefore, bleaching treatment is required. The purpose of bleaching is to destroy the conjugated groups on the pigments and give the fabric. Stable whiteness....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06L4/70D06L4/30D06L4/15D06L4/13D06L4/12
CPCD06L4/70D06L4/30D06L4/15D06L4/13D06L4/12
Inventor 范雪荣王月张旭建孙瑞凌娄江飞袁久刚徐进
Owner JIANGNAN UNIV