Method for bleaching cashmere loose fiber

A cashmere powder and fiber technology, which is applied in the field of fiber bleaching, can solve the problems of restricting the market prospect of goat hair, easy decolorization of goat hair and high cost, so as to reduce the damage to the microstructure, shorten the bleaching time, and improve the firmness. Effect

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 goat hair is prone to decolorization
This largely limits the market prospects of goat hair

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] A method for bleaching cashmere loose fibers, the steps are as follows:

[0038] A. Pre-bleaching

[0039] Put the cashmere loose fiber into the pre-bleach treatment solution and soak for 1.25 hours, then stir the cashmere loose fiber in the pre-bleach treatment solution for 35 minutes;

[0040] The composition of the pre-bleach treatment solution includes:

[0041] 2.6wt% sodium chloride, 0.7wt% sodium carbonate, 0.18wt% alkali-resistant penetrating agent OEP-70, 0.18wt% JA-50 degreasing agent, and the balance is water;

[0042] The pH value of the pre-bleach treatment solution is 8.6;

[0043] The temperature of the pre-bleach treatment solution is 57°C;

[0044] B. The first oxidation bleaching

[0045] After the cashmere loose fiber has been pre-bleached in the above step A, it is taken out from the pre-bleaching treatment solution and left to stand for 15 minutes, then put into the first oxidation bleaching treatment solution, placed for 3 hours, and stirred ev...

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PUM

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Abstract

The invention discloses a method for bleaching cashmere loose fiber. The method comprises the following steps of: A. pre-bleaching by using a mixed solution comprising 2.5 to 3.0 wt% of sodium chloride, 0.6 to 0.8 wt% of sodium carbonate, 0.15 to 0.2 wt% of penetrating agent and 0.15 to 0.2 wt% of degreasing agent; B. performing oxidation bleaching for the first time by using a mixed solution comprising 30 to 35 wt% of hydrogen peroxide, 7.5 to 8.75 wt% of oxygen bleaching stabilizer and 1.2 to 1.5 wt% of cashmere protective agent; C. performing oxidation bleaching for the second time by using a mixed solution comprising 25 to 30 wt% of hydrogen peroxide, 2 to 2.5 wt% of ammonia water, 2 to 2.5 wt% of sodium pyrophosphate and 1.2 to 1.5 wt% of cashmere protective agent; D. washing by using deionized water; E. neutralizing by using acid; and F. rinsing by using deionized water. By the method, the whiteness of the bleached cashmere is improved, the production cost is reduced and the production time is reduced.

Description

technical field [0001] The invention relates to the technical field of fiber bleaching, in particular to a method for bleaching loose cashmere fibers. Background technique [0002] Natural goat hair is off-white, but the fur color popular in the market is generally pure white, which requires bleaching of goat hair. The existing cashmere loose fiber bleaching process is costly and time-consuming, and the bleached goat hair is prone to decolorization. This largely limits the market prospects of goat hair. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for bleaching loose cashmere fibers, which can solve the deficiencies of the prior art, improve the whiteness of goat wool after bleaching, and reduce production costs and production time. [0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows. [0005] A method for bleaching cashme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L3/02D06L3/16D06L4/12D06L4/13
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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