A kind of dyeing process of reactive dyes with deep color of real silk

Abstract

The invention provides a technology for dyeing real silks with a deep color through a reactive dye. The technology comprises three steps of putting a fabric into dyeing liquor prepared from the reactive dye, heating the dyeing liquor to be 85-98 DEG C, adding anhydrous sodium sulphate into the dyeing liquor, dyeing at the temperature of 85-98 DEG C for 60-180 minutes, adjusting the pH of the dyeing liquor to be 5-7, continuously dyeing the fabric for 20-40 minutes, discharging the liquor, and washing the fabric through clean running water; padding the dyed fabric to remove water from the fabric at the liquor retention rate of 50-70 percent, then immersing the fabric into working liquor for rolling out and winding at the liquor retention rate of 70-90 percent, and winding and stacking the fabric for 8-20 hours, wherein the speed of pressing rollers is 20-40 m / min, and the working liquor comprises an alkaline agent with the concentration of 5-30 g / L and the anhydrous sodium sulphate with the concentration of 0-20 g / L; finally performing jig dyeing on the padded fabric, washing the fabric through the clean running water, then washing the fabric through warm water, and washing the fabric through hot water at last. According to the technology, the reactive dye cannot be limited by the solubility and alkaline resistance of the reactive dye, and the utilization rate of the dye is greatly increased.

Description

technical field [0001] The invention relates to the field of dyeing and finishing of textiles, in particular to a dyeing process of reactive dyes with dark and thick colors for real silk. Background technique [0002] Silk has been dyed with acid and direct dyes for a long time, but the color fastness of these dyes has been difficult to reach a high level, whether it is the light fastness of light colors or the perspiration fastness of dark colors, it is difficult to meet the growing demand of consumers. higher demand. As a high-end product, the color fastness is not good, which causes a fly in the ointment in real silk products, and even affects the clothing performance of real silk products in severe cases. [0003] Although reactive dyes are also used in real silk, they cannot be popularized because of the low color fixation rate and the non-alkali resistance of real silk. Commonly used methods include jigger dyeing and exhaust dyeing. The techniques adopted include wea...

AI Technical Summary

Problems solved by technology

This process has been further improved on the basis of the original silk reactive dyeing, but the disadvantage is that when the color is fixed under alkaline conditions, a part of it is in the dyeing process and on the silk fiber—NH 3+ Dyes bound by ionic bonds, because -NH 3+ Loss of protons under alkaline conditions - NH 2 , the ionic bond is broken, the dye is dissolved in the dye bath, destroying the dyed dye, resulting in a decrease in the utilization rate of the dye

In addition, the addition of alkali agent at 60°C also has the risk of graying silk