Silk brocade cloth dying method

Abstract

This invention discloses a dyeing method for the real silk, the main steps as follows: first make the real silk become the graft cation monomer or its oligomers by carrying out the ultra-violet radiation graft action with the cation monomer or its oligomers solution, then removing the not reacting graft monomer or its oligomers, and then using the sour dyestuff to do the regular dyeing disposal with the grafted real silk under 15DEG C upward temperature. This method can improve the combination of the real silk and the sour dyeing negative ions and improve the dyeing rate and the dyeing depth of the sour dyestuff on the real silk, and it can decrease the dyeing process temperature; and it doesn't need use the light initiated agent and the sensitising agent, and it has high dyeing rate and continuous processing effect.

Description

technical field [0001] The invention relates to the field of dyeing, in particular to a method for dyeing real silk. Background technique [0002] The raw material of real silk is silk, and its main component is silk fibroin. Silk fibroin is a protein formed by condensation of about 18 kinds of amino acids with certain rules, among which glycine and alanine with simple structure have the highest content (about 60%); therefore, the steric hindrance of silk protein peptide chain is small, which is conducive to the formation of Compact β-fold structure, high fiber crystallinity (the crystalline part accounts for about 40% to 60% of the total silk fibroin) (Zhou Hongxiang. New Silk Dyeing and Finishing Technology. Beijing: China Textile Press, 1997, 1-7 , 99-101). Like other proteins, silk fibroin is amphoteric in water, its isoelectric point pH is 3.5-5.2, and it is not resistant to alkali and strong acid. [0003] At present, acid dyes are widely used in silk dyeing, among ...

AI Technical Summary

Problems solved by technology

However, because silk is not resistant to alkali, strong acid and high temperature, the use of many types of dyes and auxiliaries is limited.

Some dyes with better color fastness, such as: reactive dyes, vat dyes, insoluble azo dyes, sulfur (condensation) dyes, disperse dyes, etc., are difficult to use due to the need for alkaline treatment or affinity

For example, if reactive dyes are used to dye silk, the dyes will be hydrolyzed during the dyeing process, the dye uptake rate is low, and the waste of dyes is large, and the dyeing must be carried out in alkaline dyeing solutions, and silk fibers are easily damaged by dyeing solutions (Chen, GQ; Xing, TL; Huang, CR; Zhou, X. Grafting of ethylene glycol dimethacrylate (EGDMA) onto silkin aqueous alcoholic solution, Chinese Journal of Polymer Science, 2003, 21(1): 51-56.)

[0005] At present, silk is modified by grafting copolymerization reaction initiated by oxidation-reduction system or peroxide initiator, in order to improve its dyeing performance, but the reaction rate is uneven and difficult to control, and the reaction temperature still needs to be about 90-95°C. High temperature, long reaction time, low efficiency, difficult to achieve continuous processing

On the other hand, in the field of grafting by ultraviolet light irradiation, due to its low energy, photoinitiators and photosensitizers are often needed to initiate graft copolymerization. The method of copolymer, this method can avoid using photoinitiator and photosensitizer (referring to application number is 03151467.7, and the title of invention is called the Chinese patent application of " the method for the formation of graft copolymer of direct irradiating silk with ultraviolet light "), but not yet Study the application of the above method in silk dyeing

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