Structure–property of DREF-3 friction spun yarn made using twisted staple fibrous core

ABSTRACT

This article discusses the structure–property relationship of DREF-3 friction spun cotton yarn in which the core is a single twisted cotton ring yarn and the sheath is made of the same cotton fibers. The structural changes in the single staple fiber yarn when subjected to DREF spinning have been studied by using tracer fibers. The single yarn physical properties, namely its count, twist multiplier and twist direction, and the proportion of the sheath fibers used during the spinning trials, were found to correlate with the final Dref yarn mechanical properties. It was observed that the direction of single yarn twist has the most significant effect; besides, the amount of twist multiplier in the single yarn and the proportion of sheath wrapping fibers largely determine the tensile properties of such core yarns. Since breaking tenacity and elongation of the DREF yarn are inversely related, it will be appropriate to compare them in terms of specific work of rupture.

摘要

论述了DREF-3型摩擦纺棉纱的结构-性能关系，其芯为单捻棉环纱，鞘由同一棉纤维制成。用示踪纤维研究了单纤维短纤纱在DREF纺纱过程中的结构变化。单纱的物理性能，即其计数、捻度倍数和捻度方向，以及在纺纱试验中所用的鞘纤维的比例与最终的纱线力学性能有着密切的关系。单纱捻度方向的影响最显著，除了单纱捻度倍增量外，包芯纱的比例很大程度上决定了芯纱的拉伸性能。F纱线呈反比关系，在断裂的具体工作方面比较合适。

KEYWORDS:

• Core yarn
• cotton ring yarn
• Dref friction machine
• sheath fibers
• structure–property
• tracer fibers

关键词:

• 芯纱
• 棉环锭纱
• 摩擦机
• 鞘纤维
• 结构性能
• 示踪纤维