Sizing agent for sizing process of short-fiber warps and comprehensive evaluation method of sizing agent

Abstract

The invention discloses a sizing agent for the sizing process of short-fiber warps.The sizing agent comprises, by weight percentage, 90-98% of water-soluble polyester suitable for short fibers, 1-10% of PVA1788 or PVA1792 and 0.5-5% of polyacrylamide component.The comprehensive evaluation method of the sizing agent includes the steps of firstly, preparing the sizing agent; secondly, preparing size; thirdly, pumping the prepared size into a sizing tank to start warp sizing, recording size viscosity and sizing pressure during trial-production, taking the size to test the solid content of the size, and taking a warp sizing sample to test sizing rate; fourthly, testing weaving efficiency and the appearance of formed fabric after warp beams are loaded onto a loom; comparing with the fabric formed by an original starch size formula, and comprehensively evaluating the warp sizing effect.The sizing agent has the advantages that the size is good in heat stability, high in adhesive strength and capable of saving a large amount of starch; the purely-chemical sizing agent is clean and sanitary in interface, and the finished products do not mildew and are easy to store; the desizing process is simple, and the sizing agent is economical and environmentally friendly; comprehensive calculation can be achieved, sizing agent and energy costs are low, and certain economic benefits are achieved.

Description

technical field [0001] The invention relates to a size formula, in particular to a size in the short fiber warp yarn sizing process and a comprehensive evaluation method thereof. Background technique [0002] The traditional staple fiber weaving warp yarn sizing components are all based on starch. Regardless of the choice of native starch or modified starch, today’s staple fiber warp yarn sizing formula uses 70%-90% starch as the main size, and 10%- 30% PVA, polyacrylic acid or water-soluble polyester size and a small amount of auxiliary materials. The characteristics of staple fiber warp sizing slurry: the slurry must have a suitable viscosity and have a thermal stability of more than 65%. It is generally required that the viscosity ranges from 15-30mpa.s (centipoise) at 95-98°C; Polyester fiber (the most used in the market) has strong adhesive force; the hygroscopicity of the size film is between 1.0-3.0%, easy to dry, and has a certain toughness; the sizing has anti-fung...

AI Technical Summary

Problems solved by technology

[0003]1. Starch is used as the main slurry, which consumes a lot of grain, which is an absolute waste of resources for the national conditions of our country where a large amount of grain is imported;

[0004]2. The adhesive force is not strong enough, the sizing is relatively large, and the sizing rate must be kept at a large level to meet the weaving requirements, and the cost is high;

[0005]3. The thermal stability of the size is not high enough. The viscosity of the size is too high at the beginning of each vat of sizing and the viscosity is relatively small when the machine is finished, which often leads to the sizing rate of the same vat before and after the yarn The difference is large, which increases the difficulty of the slasher's operation;

[0006]4. The anti-mold performance of sizing is not strong enough. In areas with high temperature and high humidity, it is easy to form mold and mold, and it is not resistant to storage. loss of quality;

[0007]5. The desizing process is complex and the use of concentrated alkali tends to produce more sewage