Preparation method for vegetable tannin dye liquor and application thereof to dyeing aspect of real silk fabric

Abstract

The invention discloses a preparation method for vegetable tannin dye liquor and application thereof to the dyeing aspect of a real silk fabric. The vegetable tannin dye liquor is obtained by extracting larch bark, waxberry bark, black wattle bark, valonia or gallnut serving as a raw material by using acetone or water as an extracting agent or is obtained by extracting a tannin extract product of larch, waxberry, black wattle, valonia or gallnut serving as the raw material by using water as the extracting agent. The vegetable tannin dye liquor prepared by adopting the method or a dye prepared from the dye liquor is applied to dyeing the real silk fabric; the dyeing effect is obvious; the technical problem of low dyeing fastness of a plant dye in the prior art is effectively solved; and an abundant dyeing effect can be achieved by combining a mordanting technology. The raw material selected by the invention is the bark or a byproduct of forest trees and fruit trees which are planted in abundance and are rich in resources; and the dye liquor has obvious resource advantage and broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of textile dyes, and in particular relates to a preparation method of vegetable tannin dye solution and its application in the dyeing of real silk fabrics. Background technique [0002] Since the 1980s and 1990s, the modern printing and dyeing industry has produced more and more serious environmental pollution problems, and there have also been more pathological reports about synthetic dyes endangering human health, making people re-examine the ecological problems of the printing and dyeing industry. Vegetable dyes have received great attention due to their environmental protection and safety characteristics. Silk fabrics have always been loved by consumers. With the improvement of people's living conditions, the demand and quality requirements for silk fabrics are getting higher and higher, and the printing and dyeing technology of silk fabrics is also facing environmental protection and safety requirements...

AI Technical Summary

Problems solved by technology

However, the defects such as the low dye fastness of these dyeing materials to real silk fabrics have been technical problems that have not been solved for a long time in this technical field. Since the 1960s, the above-mentioned plant dyeing materials have basically stopped being used for dyeing, and are mainly used as traditional Chinese medicine.

However, the current output of tannin extract in my country is less than 500 million kg, and the product value is not high (the current price of tannin extract is 4,000-8,000 yuan / 1,000 kg), and most tannin raw materials (such as bark from logging, branches from pruning fruit trees) are used as Discarded as waste, resource utilization rate is very low

The plant dyeing materials used in the prior art related to the dyeing of real silk are mainly traditional Chinese medicinal materials such as hematoxylin, turmeric, madder, gardenia, and yam. The resources are very limited, which limits the popularization and application of natural dyeing materials in silk fabric dyeing, and , the problem of color fastness also needs to be solved urgently

[0008] It is imminent to find new natural dyeing materials to solve the requirements of stable quality, environmental protection and safety in the development of silk fabric printing and dyeing technology. At present, there is no use of other kinds of plant dyeing materials, especially the use of plant waste as plant dyeing materials to dye silk. research report