Dyeing process for improving turquoise blue leveling property of wool

Abstract

The invention discloses a dyeing process for improving turquoise blue leveling property of wool. The dyeing process comprises the following steps: 1) yarn pre-treating; 2) yarn dyeing; 3) soaping; 4) alkali washing; 5) neutralizing; and 6) softening treatment. The invention belongs to the technical field of wool dyeing, and particularly relates to a dyeing process for improving turquoise blue leveling property of wool. REMAZOL/LEVAFIX cotton reactive dye with a small molecular weight is selected to replace LANASOL/NOVACRON wool reactive dye to dye wool fibers, the dye has better permeation and migration performance, anhydrous sodium sulphate is added in three times, the dosage of the anhydrous sodium sulphate is gradually increased, and meanwhile, a dyeing heating rate is controlled to control a coloring rate of turquoise blue, so that the leveling property of dyeing is improved, and the probability of defects such as dyeing defects, inner and outer layer difference and color difference is reduced; and through soaping, alkali washing and multiple times of water washing, flooding on the surface of the fibers can be effectively washed away, and therefore it is guaranteed that various fastnesses after dyeing can meet clothing requirements.

Description

technical field [0001] The invention belongs to the technical field of wool dyeing, in particular to a dyeing process for improving the level dyeing property of emerald blue wool. Background technique [0002] Wool is a protein fiber, which is composed of amino acids. The molecule contains a large number of amino, carboxyl, and hydroxyl groups. Therefore, it can be dyed with direct dyes, acid dyes, metal complex dyes, and reactive dyes. Reactive dyes are the only dyes that can chemically react with amino groups in protein fibers to form strong covalent bonds. Therefore, their color fastness is excellent. Reactive dyes are often used to dye wool. And the current dyeing process of wool turquoise blue is: firstly carry out pretreatment, to remove impurities such as oil and ester in the yarn, and then clean up. Then add defoamer, penetrating agent, leveling agent, after running evenly, add fully dissolved LANASOL / NOVACRON reactive dyes for wool, then add a certain amount of ace...

AI Technical Summary

Problems solved by technology

Then add defoamer, penetrating agent, leveling agent, after running evenly, add fully dissolved LANASOL / NOVACRON reactive dyes for wool, then add a certain amount of acetic acid to adjust the pH value of the dyeing bath, and then heat up to 98°C at a certain heating rate for dyeing And keep it warm for a period of time, and then go through post-treatment to remove floating color and improve color fastness; because reactive turquoise blue dye is a reactive dye with copper phthalocyanine structure as the parent structure, its molecular structure is a plane quadrilateral, lacking a linear structure, and in addition The molecular weight is large, the dye has low solubility, low diffusion performance, poor reactivity, and when the electrolyte concentration or water hardness in the dyeing solution is high, it is easy to coagulate, and it is easy to have inner and outer layer difference, color flower, color difference, and color difference after dyeing. Spots, color stains and other defects, and the dye is easy to accumulate on the surface of the fiber, resulting in more floating colors and poor fastness to wet treatment

Therefore, during the production process, the turquoise blue dyeing needs to be reworked and repaired many times, the success rate of one time is low, and the production efficiency is low.

[0003] Because reactive turquoise dye has bright emerald blue light, it is an irreplaceable dye in the dyeing of wool emerald blue, brilliant blue and emerald green. In the actual production process, reactive turquoise dye is usually used as the main color, and then Supplemented with a certain amount of yellow or blue dyes to make turquoise blue, brilliant blue or emerald green, and due to the unique copper phthalocyanine structure of reactive turquoise blue dyes, its solubility and diffusion and permeability are poor. In the process of thread dyeing or top dyeing, various dyeing defects such as poor inner and outer layers, poor stranding, and color blooms often occur, resulting in emerald blue dyeing. It has always been a big problem for dyers to overcome. It is urgent to study a method that can improve emerald Dyeing Process of Blue Dyeing Level Dyeing

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