Abstract

Yarns with good moisture transport property are highly desirable for applications in wearing clothing to maintain a proper thermal-wet comfort, especially when a body sweats. However, most of the studies on moisture transport of yarns only compare the wicking results of different yarns, and the structural ingredients relating to the liquid moisture transport property are still not clearly interpreted. Here, three types of wide-used yarns, i.e. ring spun yarn, rotor spun yarn and vortex spun yarn, are selected to investigate the effect of yarn structure on the liquid moisture transport behavior. The meso-scale geometrical structure of the three kinds of yarns was captured using image analysis techniques, and the liquid moisture transport property was identified and compared based on the wicking experiments. An in-situ observation method with a combination of spatial and temporal resolution was applied to analyze the internal trend of liquid transport in three kinds of yarns with different structure in order to enhance our comprehensive understanding of the structural effect on moisture transport mechanism. Results showed that the wicking height of ring spun yarn was the highest, followed by vortex spun yarn, and rotor spun yarn has the lowest wicking height. The in-situ observation indicated that the relatively homogeneous spiral morphology of fibers in ring spun yarn forms effective transport pathway of liquid, showing excellent liquid transport property. The liquid transport was only observed along the fibers in the middle part of the vortex spun yarns where the fibers were approximately paralleled to axial direction with fiber-to-fiber wicking effect being the main liquid transport way. Rotor spun yarns show similar yarn structures, but the mass hairiness on the surface of rotor spinning prevents the spreading of liquid, resulting in uncertain fluctuations during the liquid transport, thus decreasing the moisture transport property of yarns.

摘要

具有良好水分传输性能的纱线非常适合用于穿着服装以保持适当的热湿舒适度，尤其是在身体出汗时。然而，大多数关于纱线水分传输的研究只是比较了不同纱线的芯吸结果，而与液体水分传输性能相关的结构成分仍未明确解释。在这里，选择三种广泛使用的纱线，即环锭纺纱、转杯纺纱和涡流纺纱，来研究纱线结构对液体水分输送行为的影响。采用图像分析技术对三种纱线的细观几何结构进行了捕捉，并基于芯吸实验识别和比较了液体水分传输特性。采用空间和时间分辨率相结合的原位观测方法，分析了三种不同结构纱线中液体输运的内部趋势，以增强我们对结构对水分输运机制影响的全面认识。结果表明，环锭纱芯吸高度最高，旋涡纱次之，转杯纱芯吸高度最低。原位观察表明，环锭纱中纤维相对均匀的螺旋形形态形成了有效的液体输送通道，表现出优异的液体输送性能。仅在涡旋纱中部的纤维上观察到液体传输，其中纤维与轴向大致平行，纤维间的芯吸效应是主要的液体传输方式。转杯纱呈现出相似的纱线结构，但转杯纺表面的大量毛羽阻碍了液体的扩散，导致液体在输送过程中出现不确定的波动，从而降低了纱线的水分输送性能。