Solid fixation alkaline agent used for reactive dye rolling braizing method dyeing

Abstract

The invention discloses a solid fixation alkaline agent for pad steaming process dyeing through reactive dyes, comprising the following components in percentage by weight: 15-30 percent of alkali metal hydroxide, 60-45 percent of alkali metal carbonate, 16-10 percent of alkali metal phosphate, 1-2 percent of chelator, 2-3 percent of alkali-resistant penetrating agent, 4-8 percent of cosolvent and 1-2 percent of color light protective agent. The alkaline agent is characterized in little dosage, convenient manufacturing and transportation, etc., and has the advantages that production cost can be reduced and environmental pollution is reduced. The alkaline agent meets the requirements on efficiency increase, emission reduction and clean production, and is sufficient to replace the prior fixation soda ash for pad steaming process dyeing through reactive dyes.

Description

technical field [0001] The invention relates to a solid color-fixing alkali agent used in the dyeing and finishing industry for pad-steam dyeing with reactive dyes, which enables users to replace sodium carbonate (soda ash, the same below) for dyeing when dyeing cellulose fabrics with reactive dyes. After color fixing, the color fixing effect of traditional solid alkali agent sodium carbonate can be fully achieved. Background technique [0002] The dyeing and finishing industry uses a large number of reactive dyes (or reactive dyes). Reactive dyes can be dyed by various dyeing methods such as exhaust dyeing, pad dyeing, jigger dyeing, and cold pad-batch. The exhaust dyeing method is divided into normal temperature and pressure, high temperature and high pressure methods. Dyeing methods such as overflow and jet dyeing, pad dyeing include pad steaming, pad drying, wet short steaming, etc., among which pad steaming method is the most used one in pad dyeing method. The process ...

AI Technical Summary

Problems solved by technology

[0005] Soda ash has been used as a color-fixing alkali agent in traditional reactive dyeing for a long time, and it has a good effect on most colors, but it has the following disadvantages when it is used in the pad steaming method: (1) large amount of addition, high cost, (2) large amount After the soda ash completes the color fixing task, it all enters the waste water, causing a large increase in the degree of waste water pollution and increasing the load and cost of waste water treatment

(3) Soda ash is not easy to dissolve, and it is very easy to agglomerate when chemicalizing the material, which will cause blockage of the dyeing machine pipeline and cause production accidents. Blocky soda ash sticks to the fabric and easily causes dyeing defects.

(5) It is difficult to control some shades. (6) Soda ash remains on the fabric after dyeing, which is extremely difficult to wash. It takes a lot of water to wash (there is also a lot of waste water), otherwise it will also cause dyeing defects.

[0018] For liquid alkaline agents, because they are all high-alkalinity objects, there are troubles in manufacturing and transportation, potential safety hazards, and high-concentration liquid products. Most liquid alkaline agents have temperature changes (especially in low-temperature environments, such as winter or northern my country. It is easy to cause unstable phenomena such as crystallization and stratification in cold regions, especially not suitable for use in the rolling and steaming process, and most of the individual solid color-fixing alkali agents that have replaced soda ash currently have silicates (such as Layered sodium disilicate, metasilicate, etc.), if used in the hole steaming method, it will make the fabric feel hard, and there will be defects such as silicon spots that seriously affect the dyeing quality.

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