棉/涤皮芯结构粗纱参数对其细纱结构与性能的影响

为探究皮芯粗纱参数对粗纱—细纱两步法纺制棉/涤皮芯结构短纤纱的外观形貌及性能的影响,研究皮芯粗纱纺纱工艺、粗纱定量、粗纱捻度,以及芯纤维含量等因素对棉/涤皮芯结构短纤纱的芯纤维外露比例和纱线性能的影响规律。并借助图像处理技术,实现了芯纤维外露比例的定量化测试。结果表明:当粗纱工序输出须条宽度由10.2 mm增至16.3 mm,皮芯粗纱中芯纤维束偏心度由26.5%降低至19.2%,细纱芯纤维外露比例降低11.3%(29.2 tex)和12.3%(19.4 tex);粗纱定量增大或捻系数减小,芯纤维外露比例降低;芯纤维涤纶含量由15%增加至25%,芯纤维外露比例增加35.6%(29.2 tex)和30.5%(19.4 tex)。

Influence of cotton/polyester sheath-core structure roving parameters on structure and performance of spun yarn

In order to investigate the influence of roving parameters on the appearance and properties of cotton/polyester sheath-core staple yarns by the two-step spinning process, the effects of factors such as spinning settings, roving linear density, roving twist and core/sheath fiber ratio on the exposure of core fiber and yarn properties were studied. With the help of image processing technology, the core fiber exposure ratio was quantitatively measured. The results show that as the width of fiber bundle output from roving frame increases from 10.2 mm to 16.3 mm, the eccentricity of core fiber bundle in roving decreases from 26.5% to 19.2%, and the exposure ratio of core fiber in yarn decreases by 11.3% (29.2 tex) and 12.3% (19.4 tex). When the roving count increases or the twist coefficient decreases, the core fiber exposure proportion decreases. When the proportion of polyester core fiber increased from 15% to 25%, the exposure proportion of core fiber increased by 35.6% (29.2 tex) and 30.5% (19.4 tex).