喷气涡流纺金属丝包芯纱的制备及其结构与性能

为改善基于金属丝的织物导电线路的特性，采用了一种改进的喷气涡流纺纱方法，制备出面向织物导电线路的，以超细金属丝（直径50 μm）为芯丝的包芯纱，并对其结构与电学、力学性能进行了分析。所设计的喷气涡流纺纱装置可以250 m/min的纺纱速度实现对芯丝为超细金属丝的包芯纱的连续制备；制备的喷气涡流纺金属丝包芯纱结构从内到外依次为金属丝、平行无捻的芯纤维及包缠纤维；金属丝在包芯纱横截面中的位置分布以位于中心至距三分之一位置区间和距中心三分之一至三分之二位置区间类型为主；喷气涡流纺金属丝包芯纱的断裂强力比金属丝提高100%～200%，纤维的包缠形式与包缠量对包芯纱内部金属芯丝的电阻值变化率随伸长率的变化没有显著影响，表明喷气涡流纺金属丝包芯纱具有与原金属丝相接近的电学性能。

Fabrication,structure and properties of vortex core-spun yarn containing a metal wire

In order to improve the characteristics of metal wire-based conductive traces on fabrics, a modified vortex spinning method was proposed for fabricating conductive traces-oriented core-spun yarns with an ultra-fine metal wire of 50 μm in diameter as the core. The structure and electro-mechanical properties of the core-spun yarns were analyzed. The results show that the proposed vortex spinning apparatus and method are capable of continuously fabricating core-spun yarns containing the ultra-fine metal wire at a speed up to 250 m/min. The fabricated vortex core-spun yarn containingmetal wire is composed of the metal wire, the untwisted parallel fibers, and the wrapper fiber from the interior to the exterior of the yarn. The positions of the metal wire in the cross-section of the core-spun yarn are mainly two types, the area between central point and 1/3radius of the yarn, and the area between1/3 radius and 2/3 radius of the yarn. The breaking strength of the vortex core-spun yarn containingmetal wire is increased by 100%-200% compared to the metal wire. Wrapping characteristics and amount of the short-staple fibers have insignificant effects on the resistance variation-elongation relations of the metal wire core in core-spun yarn, indicating that the vortex core-spun yarn containingmetal wire has similar electrical properties to that ofthe originalmetal wire.