Processing method used for dyeing wool fabric with natural dye with high colour fastness

Abstract

The invention discloses a processing method used for dyeing wool fabric with a natural dye with high colour fastness. The processing method comprises following steps: wool fabric is immersed in a treating fluid containing 0.5 to 10g / L of a wetting agent for 10 to 30min, and then is taken out from the treating fluid and dried via squeezing; the treated wool fabric is subjected to dye bath in a solution containing the natural dye and 1 to 10% (owf) of a gallnut extract, temperature is increased to 75 to 98 DEG C at a speed of 1 to 5 DEG C / min, constant temperature dyeing is carried out for 30 to 90min, and then an obtained product is taken out from dye bath and washed with water, wherein pH value of the solution ranges from 3.0 to 4.5; mordanting is carried out with a metal ion mordant, wherein mordant using amount is controlled to be 2 to 8% (owf), pH value is controlled to be 3.0 to 5.0, mordanting temperature is controlled to be 50 to 70 DEG C, and mordanting time is controlled to be 40 to 80min; high temperature steam treatment with saturated steam is carried out for 10 to 30min; fabric obtained via steaming is washed with hot water for 10 to 30min, is washed with cold water, and is subjected to dehydration and dying. The washing fastness and light fastness of the wool fabric obtained via the processing method are both relatively high.

Description

technical field [0001] The invention belongs to the technical field of textile dyeing and finishing, and in particular relates to a processing method for dyeing wool fabric with high color fastness natural dyes. Background technique [0002] The way for textiles to obtain color or pattern is to use dyes to dye or print textiles. Since the discovery of synthetic dyes in the middle of the 19th century, they have been characterized by low price, simple use, stable quality, bright color, and can solve the color fastness of various fibers. and other issues have been greatly developed. However, studies have found that some synthetic dyes are toxic, carcinogenic, and polluting, and most countries have promulgated regulations prohibiting the use of harmful synthetic dyes. At the same time, as people's awareness of environmental protection and health becomes stronger and stronger, people's interest in natural dyes is revived around the world, and many researchers have begun to devel...

AI Technical Summary

Problems solved by technology

[0004] When natural dyes are used for textile dyeing, there are certain limitations. Except for a few structural types, most natural dyes are unstable to light due to the inherent instability of their chromophores, and their light fastness is poor. Taking Textile Requirements

In addition, the molecular structure of natural dyes is generally small, and does not contain a linear structure, so the affinity for fibers is low, the affinity for fibers is low, the utilization rate of dyes is also very low, it is difficult to obtain very strong colors, and dyeing at the same time Fabric washing fastness is generally not high

Therefore, the fastness of natural dyed textiles cannot meet the relevant requirements of dyed textiles

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