摘要
以可生物降解的聚乳酸长丝为原料,经并捻、热定形加工制备了聚乳酸并捻长丝纱,优化并捻工艺和热定形工艺,并对纱线的结构和性能进行了测试分析。结果表明:并捻工序的最优捻度为300捻/m,聚乳酸并捻长丝纱比原丝断裂强度降低,断裂伸长率增大,且随捻度的增大,纱线的断裂强度逐渐降低,断裂伸长率升高;热定形工序的最佳热定形温度为80℃,热定形时间为1 h;聚乳酸并捻长丝纱表面光洁,光泽好,纱为股线结构,比原丝束断裂强度下降9.7%,断裂伸长率提高7.6%。聚乳酸并捻长丝纱提高了长丝纱的集束性、耐磨性,利于以后的织造工艺。
This paper prepares polylactic acid doubling and twisting filament yarn through doubling and twisting and heat setting with biodegradable polylactic acid filament as raw material, optimizes doubling and twisting process and heat setting process and tests and analyzes the structure and property of yarn. The result shows that the optimal degree of twist of doubling and twisting process is 300 twists/m; compared to protofilament, polylactic acid doubling and twisting filament yarn has a reduced breaking strength and increased elongation at break; with the increase of degree of twist, the breaking strength of yarn gradually decreases and the elongation at break increases; the optimal heat setting temperature of heat setting process is 80℃ and heat setting time is 1 h; polylactic acid doubling and twisting filament yarn has a bright, clear and glossy surface; the yarn has a compound yarn structure and its breaking strength reduces by 9.7% and elongation at break increases by 7. 6% compared to protofilament tows. Polylactic acid doubling and twisting filament yarn improves the bundling and abrasive resistance of filament yarn and is conducive to future weaving process.
出处
《丝绸》
CAS
北大核心
2013年第3期14-18,共5页
Journal of Silk
基金
太原理工大学校青年基金(2012L074
K201029)
关键词
聚乳酸长丝
长丝纱
并捻
热定形
纱线性能
polylactic acid filament
filament yarn
doubling and twisting
heat setting
properties of yarn
