Scouring enzyme, and preparation method, application and application method thereof

Abstract

The invention relates to a scouring enzyme which is characterized by comprising the following raw materials in percentage by weight: 30-50% of sodium metasilicate, 3-10% of alkaline pectin compound enzyme, 20-50% of sodium carbonate, 5-10% of non-ionic surface active agent, 3-8% of peroxide oxydol activating agent, and 2-5% of sodium nitrilo triacetate; and the peroxide oxydol activating agent is prepared by compounding tetraacetylethylenediamine (TAED) and sodium percarbonate at a mass ratio of 1:2. The preparation method of the scouring enzyme comprises the following steps: non-ionic surface active agent and sodium carbonate are mixed uniformly and then are added with alkaline pectin compound enzyme to be mixed uniformly; peroxide oxydol activating agent and sodium nitrilo triacetate are added in the mixture in sequence; and sodium metasilicate is added finally, and the mixture is uniformly mixed and stirred for about one hour. The scouring enzyme can be used for boiling and bleaching of cotton yarn, cotton cloth, flax and ordinary cotton fabric or other mixed fabric before dyeing and has the advantages of simple process, low energy consumption, short time and low damage to fiber.

Description

technical field [0001] The invention relates to an auxiliary agent for textile printing and dyeing cotton and polyester cotton pretreatment, in particular to a scouring enzyme and a preparation method thereof. Background technique [0002] The pretreatment of cotton fabrics includes desizing, scouring, bleaching and mercerizing. The purpose of desizing is not only to remove the size on the gray cloth, but also to remove some natural impurities to facilitate subsequent scouring and bleaching. Desizing methods include enzyme desizing, alkali desizing, acid desizing, etc. The most widely used is alkali desizing. After the gray fabric is desized, most of the natural impurities (such as waxy substances, pectin substances, nitrogenous substances, etc.) remain on the fabric, which affects the dyeing and printing process. In order to remove these impurities, the fabric must be scoured in high temperature lye. The main agent for scouring is caustic soda. In order to improve the sc...

AI Technical Summary

Problems solved by technology

[0006] The shortcomings of the traditional hydrogen peroxide bleaching technology are as follows: the oxygen water steaming (or cooking) process needs to be treated at high temperature (95-100°C) for about 1 hour to complete the bleaching effect, which not only consumes high energy, but also damages the fibers. Larger, the fabric breaking strength drops significantly by more than 15%, and the degradation rate of cellulose fibers is about 40-50%

The hydrogen peroxide cold pad-batch process has a small amount of padding, short stacking time, changes in ambient temperature and fluctuations in washing conditions have a greater impact on the bleaching effect, and the quality stability cannot be said to be satisfactory.

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