Preparation, application and desizing method of composite size for sizing high-count pure cotton yarn

Abstract

The invention relates to preparation and application of a composite sizing agent for high-count cotton yarn sizing and a desizing method. The preparation and application comprise the following steps: (1) using brewer's grains as a raw material for preparation of the composite sizing agent, putting the above materials into a sodium hydroxide solution, heating at constant temperature of 50-90 DEG C for 30-90 min, centrifuging or carrying out suction filtration to remove undissolved residue, and using a supernatant to prepare the composite sizing agent for high-count cotton yarn sizing; and (2) carrying out sizing process of cotton yarn by the use of a single-yarn sizing machine, adopting a double soak and press mode with temperature of sizing box being 40-70 DEG C, dying room temperature being 50-80 DEG C and sizing speed being 10-50 m / min, controlling permeation and coating ratio of the size in the yarn according to pressure adjustment, and carrying out coordination control of sizing percentage by sizing agent concentration and pressure. The prepared composite sizing agent is low-cost, has good sizing performance, is suitable for cotton yarn sizing, is easy to desize, contains no hardly degradable substance or substances harmful to the environment, and is clean and environmentally friendly.

Description

technical field [0001] The invention relates to the preparation, application and desizing method of a novel composite size suitable for sizing high-count pure cotton yarns. Background technique [0002] The purpose of sizing is to saturate and cover the yarn with sizing material to increase its strength, improve wear resistance, and reduce hairiness, thereby reducing or preventing warp yarn breakage in the weaving process and improving weaving efficiency. It is a must in the textile industry. An indispensable process. At present, the three main varieties in the size industry are: polyvinyl alcohol, modified starch and acrylic size. Starch size has good film-forming properties, strong affinity with natural fibers, and is easy to desizing; but starch size has insufficient sizing strength, is easy to break, and has poor wear resistance. Polyvinyl alcohol sizing film has high strength and good flexibility, and is often used for sizing pure cotton. However, it is difficult to d...

AI Technical Summary

Problems solved by technology

At present, it is mostly used in breeding, and it is rarely used in other aspects. Pile up or discard a large amount of beer lees outdoors, which will pollute the environment.