Modification method of cellulose fiber fabric and salt-free dyeing method

Abstract

The invention relates to a modification method of a cellulose fiber fabric, which comprises the following steps: preparing stem grafting liquid, wherein the stem grafting liquid is based on total weight and contains 0.5-10 percent of 2-hydroxy-3-chloropropyl triazine ammonium chloride compound, 0.1-8 percent of sodium hydroxide, 0.1-1 percent of penetrating agents and water for allowance; placing the stem grafting liquid and fabric into a dyeing machine, operating for 60-200 minutes at a temperature of 40-70 DEG C and washing the fabric after temperature drop; or placing the stem grafting liquid and fabric into a padder to pad for 4-12 hours, wherein the padding ratio is 100 percent, and the dapping temperature is 20-40 DEG C; and washing the fabric after padding. The dyeing method of the modified fabric comprises the following steps: adding reactive dye liquor into the dyeing machine, wherein the dye liquor is based on the weight, contains no salt and has the bath ratio of 1:7-20; rising the temperature of the dye liquor to be 45-85 DEG C, adding 8-15 g of sodium carbonate for the dye liquor / liter, taking the fabric out after the heat is preserved for 45-50 minutes, washing the fabric with clean water and washing with washing liquid containing the sodium carbonate and washing powder, wherein the washing temperature is 60-85 DEG C, and the washing time is 10-30 minutes; and finally taking the machine out after the fabric is washed with clean water again.

Description

technical field [0001] The invention relates to a chemical modification method and dyeing method of cellulose material (cotton, linen, viscose) and protein material and their blended fabrics. Background technique [0002] Cotton fabrics are commonly dyed using reactive and direct dyes. However, the dye uptake rate and fixation rate are only about 80% at most, and the remaining 20% ​​are discharged with the dye liquor wastewater, resulting in increased dye consumption and increased cost. Moreover, a large amount of water is required for cleaning, which increases the burden of sewage discharge and treatment. Especially when dyeing, a large amount of inorganic salts (sodium chloride and sodium sulfate, 30-100 grams per liter of dyeing solution) must be added. The discharge of salty printing and dyeing wastewater destroys the ecological environment of the water. The high penetration of salt leads to salinization of the soil around rivers and lakes, reducing the yield of crops,...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of low dyeing rate and color fixation rate of cellulose fiber fabrics in the prior art, resulting in low dye utilization rate and difficult dye liquor wastewater treatment, and solves the problem that a large amount of inorganic salt must be added when dyeing in the prior art. The problem that the discharge of printing and dyeing wastewater with high salt content destroys the ecological environment provides the modification method and salt-free dyeing method of the cellulose fiber fabric of the present invention; 3-Chloropropyl triazine ammonium chloride compound is used as a grafting agent for fabrics. This modifier is a multi-active cationic compound with s-triazine and epichlorohydrin derivatives. After grafting, the cellulose fiber The surface is changed from negatively charged to positively charged, which reduces the charge repulsion between cellulose fibers and anionic dyes, greatly improves the affinity between fabrics and dyes, and does not need to use inorganic salts as dyeing accelerators during dyeing, and can also obtain higher dyeing. The depth and dye utilization rate can realize the purpose of clean production of dyeing wastewater without salt, without or with little dye

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