A Novel Concept to Produce Super Soft Characteristic Ring-yarn with Structural Variation via Against-twisting

ABSTRACT

In this study, a novel concept has been introduced as a structural varied against-twisting method to produce super soft characteristic yarn with low residual torque. Geometrical analysis indicated that the regular intervention of reverse twist stress remodeled the fiber arrangements in yarn structure, causing fiber motion trace variations from the original concentric helix to the deformed nonconcentric helix with the emergence of reversed fiber segments. The mechanical property prediction revealed the wet snarlings of against-twisted yarn with lower inclination angle on yarn apparent structure was much smaller than the less-twisted yarn with same twists. Then, the systematical comparison was then conducted between against-twisted yarn produced by the twice twisting process and less-twisted yarns spun with twist reduction, which showed that against-twisted yarns have lower residual torque and higher yarn strength than that of less-twisted yarns. However, the against-twisted yarns have a fluffy structure with more hairiness.

摘要

本研究提出了一种新的概念, 即变结构逆捻法生产具有低残余扭矩的超软特性纱线。几何分析表明, 扭转应力的规律性干预改变了纱线结构中纤维的排列方式, 使纤维运动轨迹从原来的同心螺旋线变化到变形的非同心螺旋线, 并出现反向纤维段。力学性能预测结果表明, 在纱线表观结构上, 低倾斜角退捻纱的湿缠结比相同捻度的低捻纱小得多。然后, 对二次加捻法生产的退捻纱与低捻纱进行了系统的比较, 结果表明退捻纱比低捻纱具有更低的残余扭矩和更高的成纱强度, 但是反捻纱结构蓬松, 毛羽较多。

KEYWORDS:

• Yarn structure
• yarn residual torque
• against-twisted yarn
• ring spinning
• twist reduction
• fiber motion trace

关键词:

• 纱线结构
• 纱线残余扭矩
• 退捻纱
• 环锭纺纱
• 捻度降低
• 纤维运动轨迹

Additional information

Funding

National Natural Science Foundation of China [No. 51773158] .