Comparative Analysis of the Properties of Yarn Spun by Rotary Threaded Surfaces with Different Pitches

ABSTRACT

In this study, theoretical analysis was conducted for fiber control by contacting rotary-threaded surface during conventional spinning. The phenomenon of pre-twisted fiber sub-assemblies produced by thread micro units was discovered to adjust yarn formation zone, and the key mechanisms on remodeling the shape of twisting triangle with different-threaded axial forces was theoretically discussed. Then, the properties of three various yarns spun by rotary-threaded surface with different pitches were compared to that of original yarn. Yarn hairiness results revealed that harmful hair decreased as the threaded pitches shortened, trapping losing fiber and enhancing edge fiber control by rotary-threaded surface. The losing fiber trapping and edge fiber assembling caused reduction of thin places, while the blocking twist transmission possibly increased the thick places and neps. Yarn tensile results showed significantly improvement after applying the rotary-threaded surface with shorter pitches, and the stronger agglomeration force provided higher fiber utilization for closer yarn structure. The experimental results corresponded well with the theoretical analysis.

摘要

本研究通过接触传统纺纱过程中旋转螺纹表面, 对纤维控制进行了理论分析. 发现了螺纹微单元产生的预扭纤维子组件现象, 以调整纱线形成区, 并讨论了用不同螺纹轴向力重塑扭曲三角形形状的关键机制. 然后, 将旋转螺纹表面旋转的三种不同纱线与原纱线的特性进行比较. 纱线发毛结果表明, 有害头发减少, 因为螺纹间距缩短, 捕获失去纤维和加强边缘纤维控制由旋转螺纹表面. 纤维的丢失诱捕和边缘纤维的组装导致薄地方的减少, 而阻塞扭曲传输可能增加厚的地方和内普斯. 纱线拉伸结果表明, 采用旋转螺纹表面后, 具有较短的间距, 更强的聚集力为更紧密的纱线结构提供了更高的纤维利用率. 实验结果与理论分析吻合良好.

KEYWORDS:

• Rotary threaded surfaces
• threaded pitches
• ring spinning
• agglomeration force
• yarn properties
• hairiness

关键 字:

• 旋转螺纹表面
• 螺纹间距
• 环旋转
• 聚集力
• 纱线性能

Additional information

Funding

This work was supported by the The National Nature Science Foundation of China [No. 51773158].