长丝喂入位置对赛络纺包芯纱结构与性能影响

针对赛络纺包芯纱纺制过程中,长丝不同喂入位置对纱线结构和性能的影响,分别纺制了涤纶长丝在左侧粗纱须条中心、两粗纱须条中间、右侧粗纱须条中心3种结构的短纤/长丝赛络纺包芯纱。对比分析了纱线截面、成纱质量、耐磨性能、拉伸断裂过程和纱线退捻特征。结果表明:3种包芯纱中涤纶长丝均在纱线中心附近,无明显漏丝,条干均匀,毛羽较少;左侧粗纱须条中心喂入纱线拉伸断裂曲线有多峰特征,两粗纱中间喂入纱线拉伸断裂曲线有密集波动特征;右侧粗纱须条中心喂入纱线初始弹性模量最高,拉伸断裂特征为阶梯性断裂,退捻最困难,且在退捻过程中部分纱段被反向加捻,纱线结构最稳定,耐磨性好,纱线强力最高。

Effect of filament feeding positions on structure and properties of siro-spinning core-spun yarns

To investigate the influence of different filament feeding positions on core-spun yarn performance in siro-spinning, three types of core-spun yarns were spun. Polyester filaments in the spinning process were fed in the center of left roving filament, in the center of two roving filament and in the center of right roving filament, respectively. The cross-section, quality, abrasion resistance, tensile fracture and untwisting characteristics of the prepared core-spun yarns were compared and analyzed. The results show that there are no obvious phenomena of filaments out of yarn surface for all the core-spun yarns, and the inner polyester filament was near the center of the yarn. The yarns were clean and even with less hairiness. For the yarn fed in the left roving center, the tensile fracture of yarn was characterized by multi-peak fracture. For the yarn fed in the two roving center, the tensile fracture of yarn was characterized by dense fluctuation. While for the yarn fed in the center of right roving, its tensile fracture characteristic was in the form of ladder shape. Among the yarns, the initial elastic modulus of the yarn fed in the center of right roving was the highest and the untwisting of this yarn was the most difficult, and during the unwinding process of the yarn, some yarn segments were reversely twisted, which showed a more stable yarn structure and thus provided a good abrasion resistance and the highest yarn strength.