Basic desizing and levelling agent

Abstract

The invention discloses a basic desizing and levelling agent suitable for alkaline condition, which is prepared with the following materials in part by weight: 54 to 66 parts by weight of sodium dihydrogen phosphate, 36 to 44 parts by weight of iso-tridecanol polyoxyethylene ether, 90 to 110 parts by weight of water and 9 to 11 parts by weight of rare earth. The basic desizing and levelling agent can be used as special auxiliary for the basic dyeing of terylene, the characteristics of the combination solution of the basic desizing and levelling agent are suitable for the process of the one-bath dyeing method for woven fabrics as well as the one-bath oxygen-bleaching dyeing method for polyester-cotton blended fabrics, the pre-dyeing desizing and chlorine bleaching processes and the complex process of post-dyeing repeated reduction clearing in the prior art are omitted, so that the production efficiency is greatly increased and the production cost is greatly reduced, moreover, the environment pollution caused by the basic desizing and levelling agent is little, in particular, the application of the rear earth material can greatly reduce the dosage of dye, greatly decrease the chromaticity of waste dyeing liquid as well and reduce environment pollution, and therefore the basic desizing and levelling agent is significant for the development of printing and dyeing production toward low pollution and cleanliness.

Description

technical field [0001] The invention relates to the field of textile dyeing and finishing, in particular to a desizing and leveling agent for the one-bath alkaline dyeing process of woven fabrics. Background technique [0002] Traditional woven fabric dyeing is generally divided into three steps: desizing, dyeing, and reduction cleaning. The purpose of desizing is to remove the size attached to the fabric during the weaving process of the woven fabric and some natural impurities of the fabric itself before dyeing. In order to facilitate the processing and dyeing effect of the subsequent dyeing process; the desizing process generally adopts the alkali desizing method, and the principle of the alkali desizing is that all kinds of sizing materials will swell in hot lye, and the adhesion to the cloth surface will become loose. Part of the size can be dissolved in lye and can be washed off with hot water to achieve the effect of desizing; after desizing and before the subsequent ...

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Problems solved by technology

[0003] The dyeing is a complex physical and chemical process. The dyestuff is first transferred to the fiber and adsorbed on the surface of the fiber, and then gradually enters the inside of the fiber to dye the fiber thoroughly. The penetration and combination of the dyestuff in the fiber will directly affect the dyeing effect; the traditional process Due to the poor alkali resistance of disperse dyes, dyeing conditions need to be dyed under weakly acidic conditions or under neutral conditions, otherwise the dyeing effect will be affected, which is also the traditional dyeing process that must be independent of the desizing process an important reason

[0004] Therefore, the dyeing and finishing process of the traditional woven fabric dyeing is cumbersome, the number of times of equipment cleaning, especially the number of reduction cleaning after dyeing is large, the process time is long, and the cost of equipment and energy is large; in addition, with the alkali resistance of disperse dyes Performance improvement, there are some destaining one-bath processes, but due to the lack of auxiliaries that can have good desizing and leveling performance at the same time, the desizing effect before dyeing is not good, and the level dyeing is repeatable in dyeing. If the dyeing and stability are insufficient, the overall dyeing effect of the fabric is average, the amount of auxiliaries used is also large, and the pollution to the environment is relatively large, which does not meet the optimized production requirements of energy saving and emission reduction advocated by modern times.

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