Aramid fabric high-efficiency dyeing and finishing process

Abstract

The invention discloses an aramid fabric high-efficiency dyeing and finishing process including modification treatment, scouring and dyeing in one bath, soaping, color fixation, post-finishing, drying, sizing, calendering, and coiling. According to the dyeing and finishing process, before the dyeing process, a fabric is subjected to low temperature plasma treatment, then the fiber fabric is subjected to modification treatment with 2,3-epoxypropyltrimethylammonium chloride and chitosan, and thus the fabric dyeing degree is increased, and the difficulty of the subsequent dyeing steps is reduced; at the same time, ultrasonic treatment is adopted during modification treatment, so that the time is saved and the treatment efficiency is improved; with adopting of scouring and dyeing in one bath, the efficiency is increased, and the cost is reduced; in the dyeing process, a large amount of alkaline substances and inorganic salts are not used, natural dyes are used, and at the same time, a colophony powder is added as a color fixing agent, so that the color fixing effect is enhanced, besides, the environmental pollution is avoided, and the requirements of environmental protection are met; and with increase of anti-yellowing finishing, a final fabric does not easily turn yellow.

Description

technical field [0001] The invention relates to a high-efficiency dyeing and finishing process for aramid fiber fabrics. Background technique [0002] Fiber is divided into chemical fiber and natural fiber. Natural fiber refers to the fiber that exists and grows in nature and has textile value. Chemical fiber is made of natural polymer compound or artificially synthesized polymer compound. Fibers with textile properties produced by silk and post-treatment processes. Chemical fibers have the advantages of light resistance, wear resistance, easy washing and drying, no mildew, no moths, etc., and are widely used in the manufacture of clothing fabrics, filter cloths, conveyor belts, hoses, ropes, fishing nets, electrical insulation threads, medical sutures , tire cord and parachute etc. [0003] Aramid fiber [mainly divided into para-aramid (MPIA) and meta-aramid (PPTA)], which is a kind of chemical fiber, has high strength and high modulus, high temperature resistance, and ex...

AI Technical Summary

Problems solved by technology

However, this process is complicated, the efficiency is low, and the energy consumption is high.

At the same time, during scouring, alkaline solutions such as hydrosulfite and sodium carbonate are usually used for high-temperature treatment, which will cause greater damage to the fibers.

[0005] In addition, in the dyeing process of aramid fiber fabrics, in order to reduce environmental pollution, natural dyes are currently being studied, but natural dyes usually need to be dyed at a lower temperature, and the dyeing effect of natural dyes is poor, and the dyed The color fixation of fabrics is low. In order to improve the color fixation, a large amount of soda ash and inorganic salts are usually added during the dyeing process, which brings great difficulties to the treatment of printing and dyeing wastewater with high salt content, such as direct discharge will damage the ecological environment. , lead to soil salinization, while using natural dyes usually also use some heavy metal ions as mordants, which do not meet the requirements of current ecological textiles, and the shade of fabrics after heavy metal ions mordant dyeing mostly becomes dim, affecting the brightness of dyed fabrics degree and aesthetics