Dyeing technique for dyeing processing yarn of activated dye for silk plied yarn

Abstract

The invention discloses a dyeing process of a dyeing process line of reactive dyes for silk strands, which is characterized in that it comprises the following steps: injecting water to increase temperature, adding a refining agent, pressurizing and increasing temperature, continuous refining, reducing pressure and draining liquid, washing with water, Dyeing, the present invention adopts the above process scheme, so that the coloring rate reaches more than 95%, the color fastness reaches more than 4 grades, and can dye very deep colors; the dyeing cycle is shortened by 30% compared with normal temperature skein dyeing, and the amount of dyed products is increased. more than 5 times, so the dyeing efficiency is greatly improved, and the bath ratio is only 1 / 2 of the original, which can save water and reduce the discharge of tail liquid; The removal speed is faster and the efficiency is higher. The raw silk degumming of the outer layer and the core of the whole silk strand is uniform and clean, so that the dye is easy to dye through the silk strand, and the coloring is uniform without white core, and the dyeing effect is good.

Description

【Technical field】 [0001] The invention relates to the technical field of silk package yarn dip-dyeing technology, in particular to the technical field of a dyeing process thread of reactive dyes used for silk strands. 【Background technique】 [0002] Traditionally, silk is dyed with neutral or acidic dyes. Silk and dyes rely on ionic bonds to form Van der Waals’ combination, which is weak. In this process, silk is easy to fade and cannot be dyed into dark colors. Therefore, the industry currently uses Reactive dyes dye silk. At this time, silk and dyes undergo a chemical reaction and finally combine to form a covalent bond. This combination is stable and firm, but it also has the following disadvantages: [0003] 1. Reactive dyes for wool are developed for the dyeing of protein fibers, so it is suitable for dyeing silk fibers. At present, the dyeing of silk strands in the industry adopts normal pressure, dyeing the skein in the open groove, and the highest temperature can onl...

AI Technical Summary

Problems solved by technology

[0003] 1. Reactive dyes for wool are developed for the dyeing of protein fibers, so it is suitable for dyeing silk fibers. At present, the dyeing of silk strands in the industry adopts normal pressure, dyeing the skein in the open groove, and the highest temperature can only reach 95 ℃, so it is difficult to dye through the thick thread of silk strands, white core phenomenon is easy to appear, and the dyeing cycle is long and the efficiency is low

[0004] 2. Reactive dyes for cotton are mainly developed for the dyeing of cellulose fibers. They work at a dyeing temperature of 50-70°C and are easily hydrolyzed at high temperatures. The dyeing of protein fibers such as silk strands has the disadvantages of low coloring efficiency and low fixation rate.

[0005] 3. Reactive dyes for chemical fibers are developed for the dyeing of chemical fiber polymer compounds. Although they can be dyed under high temperature and high pressure conditions, they have low dyeing rate, low fixation rate and high raffinate concentration when dyeing silk strands and protein fibers. , Disadvantages of great environmental pollution