De-coloring method of cotton

Abstract

The invention provides a de-coloring method of cotton. The de-coloring method comprises the specific steps: (1) loosening the cotton; stirring and scattering a pre-washing solution until the moisture of the cotton reaches 40 percent to 60 percent, wherein a pre-washing agent is prepared from 10 to 20 parts of 30 percent hydrochloric acid solution, 5 to 10 parts of 5 percent organic phosphonic acid solution, 5 to 10 parts of 8 percent sodium chloride solution and 50 to 80 parts of water; (2) washing with an enzyme: adding the pre-washed cotton into an enzyme washing agent, wherein the enzyme washing agent is prepared from 10 to 20 parts of mercerized proteinase, 10 to 20 parts of a non-ionic washing agent, 10 to 20 parts of a caustic soda flake and 80 to 100 parts of water; immersing at room temperature for 2 to 3 hours; (3) after washing with water, adding into an oxygen bleaching agent, wherein the oxygen bleaching agent is prepared from 3 to 5 parts of an oxygen bleaching stabilizer, 10 to 20 parts of hydrogen peroxide and 80 to 100 parts of water; (4) washing with the water for a plurality of times and drying. The de-coloring method of the cotton is short in period, high in efficiency and low in cost; the treated cotton has good whiteness, less weight loss, small strength loss and good hand feeling and is easy to spin and weave.

Description

technical field [0001] The invention relates to the technical field of hair decolorization, in particular to a cotton decolorization method. Background technique [0002] Currently on the market, many cotton cold decolorization technologies are used. The disadvantage is that the decolorization time is long, nearly 48 hours, the production efficiency is low, and the cotton scales are damaged after decolorization, which is time-consuming and laborious. There is also the use of thermal decolorization technology, the average decolorization time is 7 to 9 hours, and many problems with thermal decolorization technology are: large amount of ferrous salt, many times of washing, some washing times as many as 5 to 7 times, waste of water, Time-consuming, unclean ferrous ions excessively oxidize cotton fibers during oxygen bleaching, which not only wastes hydrogen peroxide, but also causes large cotton damage, high weight loss, low whiteness, and low efficiency. Contents of the inven...

AI Technical Summary

Problems solved by technology

[0002] Currently on the market, many cotton cold decolorization technologies are used. The disadvantage is that the decolorization time is long, nearly 48 hours, the production efficiency is low, and the cotton scales are damaged after decolorization, which is time-consuming and laborious.

There is also the use of thermal decolorization technology, the average decolorization time is 7 to 9 hours, and many problems with thermal decolorization technology are: large amount of ferrous salt, many times of washing, some washing times as many as 5 to 7 times, waste of water, Time-consuming, unclean ferrous ions excessively oxidize cotton fibers during oxygen bleaching, which not only wastes hydrogen peroxide, but also causes great cotton damage, high weight loss, low whiteness, and low efficiency