High-whiteness low-temperature bleaching method for cashmere or wool

Abstract

A high-whiteness low-temperature bleaching method for cashmere or wool includes the following steps that a, an activating solution is prepared, wherein the activating solution comprises 2-4 parts of apenetrant, 0.5-2 parts of activator and 4-7.5 parts of the balance water; b, a whitening solution is prepared, wherein the whitening solution comprises 2 parts of a disperse chelating agent, 0.01 part of disperse dye of a specific structure and 7-8 parts of water; c, to-be-bleached cashmere or wool is dipped into a bleaching working solution until the mass ratio of the to-be-bleached cashmere orwool to the bleaching working solution is 1:(8-20), wherein the bleaching working solution comprises the activating solution, the whitening solution, hydrogen peroxide and a compound alkaline agent.

Description

technical field [0001] The invention relates to a high-whiteness low-temperature bleaching method for cashmere or wool. Background technique [0002] Cashmere is a very precious natural protein fiber, which is used in the processing and production of various high-grade textiles due to its excellent wearability. However, the natural color of cashmere is slightly yellow, dark and dull, and it must be bleached to increase its vividness. [0003] At present, in large-scale industrial production, hydrogen peroxide (H 2 0 2 ) is widely used in the bleaching of textiles due to its mild reaction, no pollution, and good bleaching effect. But regular H 2 0 2 Bleaching requires alkaline high-temperature conditions to achieve a good bleaching effect, which is easy to damage cashmere and consumes a lot of energy. Therefore, the researchers tried to 2 0 2 Adding activator tetraacetylethylenediamine (abbreviation: TAED) to the bleaching bath has achieved good results in low tempera...

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Problems solved by technology

But regular H 2 0 2 Bleaching requires alkaline high temperature conditions to achieve a good bleaching effect, which is easy to damage cashmere and consumes a lot of energy

Therefore, the researchers tried to 2 0 2 Adding activator tetraacetylethylenediamine (abbreviation: TAED) to the bleaching bath has achieved good results in low temperature (60-80°C) bleaching of protein fibers such as wool, but the whiteness is far less than high temperature (95-100°C). ) bleaching effect, in addition, acetic acid is used for neutralization after bleaching, which will easily bring the sour smell of wool

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