Environmental-friendly dyeing and finishing process of real silk fabric

Abstract

The invention discloses an environmental-friendly dyeing and finishing process of a real silk fabric. The environmental-friendly dyeing and finishing process of the real silk fabric comprises pretreatment, presetting, cryogenic freezing treatment, dyeing, mordant removal, soaping, color fixing, post-finishing, drying, setting, calendering and winding. By performing pretreatment with helicase and alpha-amylase and by adopting cryogenic freezing treatment before dyeing, the performance of the real silk fabric is fundamentally modified and the dye uptake rate of the fabric is improved; a great amount of alkali substances and inorganic salt are not used in the dyeing process and leveling agent and dispersing agent are added, the dyeing uniformity is improved, the environmental pollution is avoided by using natural dyes and the requirements on the environmental protection are satisfied; since self-cleaning treatment is added during post-treatment, the self-cleaning ability, the wrinkling resistance and the water washing fastness of the fabric are improved; the entire process is environmental-friendly and pollution-free.

Description

technical field [0001] The invention relates to an environment-friendly dyeing and finishing process for real silk fabrics. Background technique [0002] Fiber is divided into chemical fiber and natural fiber. Chemical fiber has the advantages of light resistance, wear resistance, easy washing and drying, no mildew, and no moth. It is widely used in the manufacture of clothing fabrics, filter cloth, conveyor belts, hoses, ropes, Fishing nets, electrical insulating wires, medical sutures, tire cords and parachutes, etc. Natural fibers refer to fibers that exist and grow in nature and have textile value. Chemical fibers use natural polymer compounds or artificially synthesized polymer compounds as raw materials. , through the preparation of spinning dope, spinning and post-processing and other processes made of fibers with textile properties. [0003] Silk is a kind of natural fiber, to be precise, a kind of natural protein fiber. Because of its good moisture absorption, brea...

AI Technical Summary

Problems solved by technology

[0004] Traditional dyeing usually uses chemical dyes for dyeing, but chemical dyes are more polluting to the environment. In order to reduce environmental pollution, research has begun to use natural dyes for dyeing, and when dyeing with natural dyes, it is usually dyed at a lower temperature, so that The requirements for the equipment are lower, and the energy consumption will be reduced

[0005] However, the dyeing effect of natural dyes is poor, and the color fixation of the dyed fabric 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 serious problems for the treatment of printing and dyeing wastewater with high salt content. It is more difficult, such as direct discharge will destroy the ecological environment and lead to soil salinization

At the same time, when natural dyes are used, some mordants containing metal ions are usually used. Although the use of mordants will improve the dyeing effect, if the mordants cannot be completely removed in post-processing, it will not only pollute the environment, but also cause pollution. It will make the shade of the fabric mostly dim, affecting the vividness and aesthetics of the dyed fabric

In addition, in order to reduce the difficulty of dyeing in the subsequent dyeing process, the fiber fabric usually needs to be pretreated before dyeing, but the current pretreatment basically uses alkaline solutions such as hydrosulfite and sodium carbonate for high temperature pretreatment, which will affect the fiber. Larger damage