Polyester dyeing agent and desizing dyeing process flow thereof

Abstract

The invention discloses a polyester dyeing agent and desizing dyeing process flow thereof. The polyester dyeing agent comprises a dye and an emulsification composition agent; the emulsification composition agent comprises components in parts by weight: hydroxyethylidene diphosphonic acid and macrogol ester; and the process flow of the polyester dye comprises desizing, dewatering, charging dyeing and fabric discharging. In the invention, the emulsification composition agent is added into the dyeing agent, wherein the hydroxyethylidene diphosphonic acid and the macrogol ester take an emulsification effect in the charging dyeing process, so that large particle fibers generated after a polyester fabric is treated by an alkali deweighting process can be emulsified into small particles until a dyeing effect cannot be influenced, and under the action of emulsification, the operation of repeatedly washing the fabric to wash off fibers in the desizing dyeing process is avoided, in one aspect, the process duration is saved, in the other aspect, water wasted in the repeated fabric washing process is avoided, and the dyeing effect in the existing process is not influenced.

Description

technical field [0001] The invention belongs to fabric treatment technology, and more specifically relates to a polyester dyeing agent and its desizing and dyeing process. Background technique [0002] In order to improve the air permeability and moisture absorption of polyester fabrics, it is often necessary to carry out alkali reduction treatment on polyester. Alkali reduction refers to the process of treating polyester fabrics in high temperature and relatively concentrated caustic soda. After the surface of polyester is etched by alkali, its The weight is reduced, the fiber diameter becomes thinner, pits are formed on the surface, the shear stiffness of the fiber is reduced, the aurora of the polyester yarn is eliminated, and the gap of the fabric interweaving point is increased, making the fabric soft to the touch, soft in luster, and improving the moisture absorption and perspiration , has the general style of silk, so alkali reduction treatment is also called imitatio...

AI Technical Summary

Problems solved by technology

After the polyester alkali reduction process, it is the dyeing process. Usually, the pH value of the polyester fabric in the polyester alkali reduction process is usually above 15, and it cannot be directly dyed. The existing treatment method is to desizing and alkali reduction by three times of hot washing. And in the dyeing vat, there will be large particles of fiber material produced in the previous process. Direct dyeing will adhere to the surface of polyester fabrics and affect the dyeing effect. Therefore, direct dyeing after a single hot wash is impossible.

[0003] The existing desizing and dyeing process is white cloth into the vat - heating up 130°C (25min) - keeping warm for 30min - cooling down to 80°C (15min) - draining - water intake - heating up and washing at 80°C (15min) - draining ——Water intake—Water heating at 60°C (10min)—Drainage—Water intake—Washing at elevated temperature at 40°C (8min)—Drainage—Dyeing with water intake. The above process will take about two hours to complete. It takes too long, which seriously affects the efficiency of desizing and dyeing. However, in the prior art, it is impossible to clean all the fiber substances on the polyester surface by washing the cloth once, which affects the dyeing effect.

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