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Decoloration method of colored cashmere loose fiber

A cashmere powder and cashmere technology, which is applied in the field of fiber bleaching, can solve the problems of long time consumption, easy yellowing of the color, and short-term whiteness of cashmere.

Inactive Publication Date: 2013-08-14
NINGXIA RONGCHANG CASHMERE IND GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cashmere loose fiber bleaching process is costly and time-consuming, and the bleached cashmere tends to maintain whiteness for a short time, and the color tends to turn yellow
This largely limits the market prospect of cashmere

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0034] A method for decolorizing colored cashmere loose fibers, the steps are as follows:

[0035] A. Degreasing

[0036] Put the cashmere into the degreasing treatment solution, soak for 3 hours, then stir for 4 hours, take it out and let it stand for 1 hour;

[0037] The components of the degreasing treatment liquid include: 4.5wt% of TL-80 degreasing agent, 6wt% of formaldehyde, 4wt% of sodium carbonate, and the balance is water;

[0038] The temperature of the degreasing treatment liquid is 40°C;

[0039] B. Oxygen bleaching

[0040] Put the cashmere treated in the above step A into the oxidation bleaching treatment solution for 7 hours, and stir for 5 minutes every hour;

[0041] The components of the oxidative bleaching treatment solution include: 1wt% SYSCHEM 2708 fleece protection agent, 1.8wt% tetraacetylethylenediamine, 27wt% hydrogen peroxide, 12wt% sodium chloride, and the balance is water;

[0042] The temperature of the oxidation bleaching solution is 45°C; ...

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PUM

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Abstract

The invention discloses a decoloration method of colored cashmere loose fiber, which comprises the following steps of: A, degreasing by use of a solution containing 4-5wt% of degreasing agent, 5-7wt% of formaldehyde, 1-5wt% of sodium carbonate and the balance of water; B, performing oxidation bleaching by use of a solution containing 1-2wt% of cashmere caring agent, 1.5-2wt% of tetraacetylethylenediamine, 20-30wt% of hydrogen peroxide, 10-15wt% of sodium chloride and the balance of water; C, flushing with deionized water; D, performing reduction and oxidation by use of a solution containing 0.5-1wt% of fluorescent whitening agent, 1-2wt% of cashmere caring agent, 2-5wt% of sodium hydrosulfite, 1-3wt% of ferrous sulfate, 10-15wt% of ferrous sulfate and the balance of water; E, performing oxygen washing by use of a solution containing 1-2wt% of hydrogen peroxide, 0.5-1wt% of ammonia water and the balance of water; and F, drying. The method disclosed by the invention can improve the whiteness of the bleached cashmere and reduce the yellowing degree of cashmere after longtime use.

Description

technical field [0001] The invention relates to the technical field of fiber bleaching, in particular to a method for decolorizing colored cashmere loose fibers. Background technique [0002] Natural cashmere is off-white, but the fur color popular in the market is generally pure white, which requires bleaching of cashmere. The cost of the existing cashmere loose fiber bleaching process is high and time-consuming, and the whiteness of the bleached cashmere tends to remain for a short time, and the color tends to turn yellow. This limits the market prospect of cashmere to a great extent. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for decolorizing colored cashmere loose fibers, which can solve the deficiencies of the prior art, improve the whiteness of cashmere after bleaching, and reduce the color of cashmere from yellowing after long-term use. Degree. [0004] In order to solve the above technica...

Claims

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Application Information

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IPC IPC(8): D06L3/16D06L3/02D06L3/10D06L3/12D06M13/127D06M11/76D06M101/12D06L4/12D06L4/13D06L4/614D06L4/671
Inventor 杨建荣陈聊李华宋岩江赵建勋朱仟
Owner NINGXIA RONGCHANG CASHMERE IND GROUP
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