Factors affecting the low shrinkage rate of flat acrylic fibers and optimization measures
Flat acrylic fiber is a special-shaped fiber successfully developed by Sinopec Anqing Petrochemical Company in recent years,which is widely used in artificial fur,plush toys and other fields,and the ability of"import substitution"has been significantly enhanced.However,there is still a gap compared with the high-end imported flat fiber,which is mainly manifested by the high uneven rate of fiber quality and the low elastic recovery rate.Combining the production practice of NaSCN wet spinning process,based on the fiber shrinkage mechanism,this paper analyzes and verifies the influencing factors such as solvent extension radio,extension speed,extension temperature and the mass fraction of NaSCN.By optimizing and adjusting the solvent extension ratio,spinning speed and mass fraction of coagulation bath,the quality uneven rate of flat fiber can be reduced,the recovery rate of elasticity can be improved,and the quality gap with high-end imported products can be narrowed.
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