复合纱体中长丝分布形态对纱线性能的影响

为研究长丝复合纺纱过程中由长丝与短纤维须条复合产生的不同纱线内部结构对纱线性能的影响，设计并建立了6种长丝复合纺纱线结构模型，分析和预测了模型对应的成纱性能，并进行实验验证，对比分析了各复合纺纱形式所得纱线的毛羽、条干、强伸性能。结果表明：相比单独的包芯结构和长丝单侧包缠结构，长丝由两侧对须条进行包缠优化了纱线结构，表现出更佳的复合纱拉伸和成纱条干性能；同时拥有长丝双侧包缠和包芯结构的复合纱，表现出最优的成纱强力和条干；较大的长丝与须条隔距与张力更有利于长丝束缚和控制纤维外露，有效降低成纱毛羽。

Influenceoffilament distribution pattern on properties of composite yarns

To analyze the influence of inner structural changes on composite yarn properties during the varied filament composite spinning by changing the filaments and the roving positions, six different structures of composite yarn models were systematically designed and built to analyze and predict the properties of the corresponding yarns. Different structural composite yarns were produced experimentally to verify the composite yarn models. Different composite yarn properties including hairiness, evenness and tensile properties were compared and analyzed. The results show that the composite yarn with filaments wrapping from both sides of the strand had better evenness and higher tenacity thanthat of yarns with single core-filament spun structure. When the composite yarns had both bilateral wrapping and core-filament structures,an optimized yarn strength and evenness are owned. The increased filament tension and filament-strand spacing could effectively enhance the short fiber controland reduce composite yarn hairiness.