Cold pad-batch dyeing process for pure cotton fabric

Abstract

The invention discloses a cold pad-batch dyeing process for pure cotton fabric. The process flow comprises the steps of: padding and rolling a mixed liquor of a dye and an alkaline agent, coiling and plastic film coating, rotating stacking, primary water washing, soaping, secondary water washing and drying. In the padding and rolling process, an active dye at a concentration of 10g / l is adopted, 10-15 g / l of water glass is adopted as the alkaline agent, a concentration of urea is 3 to 5g / l and a concentration of sodium sulfate is 10g / l. The rotating stacking process is performed for 16h at a room temperature of 10-15 DEG C. By the adoption of the process of the invention, energy can be saved, consumption can be reduced, the fixation ratio of the dye is increased, the grade of the product is improved, and the process cost is low. Besides, the conditions of the cold pad-batch dyeing process are moderate, the fabric is subjected to low tension and small friction, and the apparent effects and hand-feel of the fabric are improved to a great extent.

Description

technical field [0001] The invention relates to a dyeing process in the field of textile printing and dyeing, in particular to a cold pad-batch dyeing process for pure cotton fabrics. Background technique [0002] With the rapid development of the economy, energy is becoming more and more important. Important materials such as water, electricity, coal, and oil are showing a rising price trend, especially for the printing and dyeing industry. In addition to the cost of dyeing and chemical materials, energy has become an important part of the printing and dyeing process. At present, many enterprises are optimizing the process in terms of energy saving and consumption reduction. The traditional rolling, drying, rolling and steaming process requires a lot of salt, which is not conducive to environmental protection, and consumes a lot of heat and electricity. At the same time, rolling, drying, rolling and steaming equipment Large investment and large area. [0003] The cold pad-...

AI Technical Summary

Problems solved by technology

However, the cold pad batch process is currently only widely used in the pretreatment process in my country, and the degree of promotion in the dyeing process is very low, because the reactive dyes, auxiliaries and process parameters of cold pad batch dyeing are not mature enough.