Low-salt and low-alkali dyeing process of cellulose fiber fabrics with medium-temperature reactive dyes

Abstract

The invention relates to a low-salt and low-alkali dyeing process with a mesothermal type active dye of a cellulosic fiber fabric. The low-salt and low-alkali dyeing process comprises the following steps: modifying a cellulosic fiber fabric to be dyed by a fiber modifying agent to prepare a partially-aminated modified cellulosic fiber fabric to be dyed; modifying the mesothermal type active dye by a dye modifying agent to prepare an activated and modified mesothermal type active dye; and carrying out low-salt and low-alkali dyeing on the cellulosic fiber fabric, namely carrying out the low-salt and low-alkali dyeing on the partially-aminated modified cellulosic fiber fabric to be dyed by the activated and modified mesothermal type active dye in the presence of neutral electrolyte, inorganic alkalis and water. According to the dyeing technology, the use amount of the neutral electrolyte and the inorganic alkalis can be reduced and the dyeing temperature can be reduced by about 10 DEG C; the dyed cellulosic fiber fabric has high coloring depth, good dyeing fastness and excellent dyeing reproducibility; the low-salt and low-alkali dyeing process can be used for dyeing various cellulosic fiber fabrics by the mesothermal type active dye.

Description

technical field [0001] The invention relates to a low-salt and low-alkali dyeing process for reactive dyes on cellulose fibers or blended fabrics mainly composed of cellulose fibers, in particular to a low-salt and low-alkali dyeing process for medium-temperature reactive dyes on cellulose fiber fabrics. Background technique [0002] In the current production practice, reactive dyes are the most commonly used dyes for dyeing cellulose fiber textiles, and the most used ones are medium-temperature reactive dyes. A lot of alkali and salt are used in the dyeing process of medium-temperature reactive dyes. In order to solve the environmental pollution and cost pressure problems caused by the traditional high-salt and high-alkali dyeing process of reactive dyes, the low-salt and low-alkali dyeing technology of reactive dyes is always relevant. research and development focus in the field. At present, the low-salt and low-alkali dyeing process of reactive dyes is mainly divided int...

AI Technical Summary

Problems solved by technology

[0014] However, practice has proved that the investment in low-salt and low-alkali dyeing equipment is large and the production efficiency is low, and the actual effect of reducing the amount of alkali used for dyeing is not clear

At the same time, the effect of ultrasonic dyeing machine on reducing the amount of salt used in reactive dyes is very limited, it is difficult to play a role alone, and industrial application cannot be realized in the short term