经编间隔织物的冲击性能

为探讨间隔织物在一定冲击能量下对人体(支撑物)的保护性能。采用的原料为在拉舍尔双针床经编机上编织的6种不同结构(不同间隔丝梳栉横移针距、间隔丝直径和织物厚度)的间隔织物。分析了不同织物在一定冲击能量下的应力、能量和能量吸收效率特征。实验结果表明，随着间隔丝梳栉横移针距数的减小、间隔丝直径的增大，冲击产生的应力峰值减小，吸收的能量和能量吸收效率峰值增加，但间隔丝过于接近垂直的织物容易发生倒伏，不利于人体保护。较厚的织物产生的应力峰值小、吸收的能量多，中等厚度的织物能量吸收效率峰值高。刚度或厚度大的织物由于产生的应力峰值小有利于人体保护，但在选择织物结构时还需考虑人体穿着的舒适性。

Impact properties of warp knitted spacer fabrics

Spacer fabrics' protection capabilities for human body (support) under particular impact energy were investigated in the paper. The samples were 6 warp-knitted spacer fabrics with different structures, i.e. different moving needles of spacer guide bars, spacer-yarns' diameters and fabric thicknesses, which were produced on double-needle-bed Raschel knitting machine. The characteristic of stress, energy and energy-absorption efficiency were analyzed and the results show that: With the decreasing of moving needles of spacer guide bars and increasing of spacer-yarns' diameters, the peak stress drops, absorbed energy and energy-absorption efficiency rise accordingly. However, fabrics with too vertical spacer yarns do not benefit for protection as they are inclined to collapse. Fabrics with higher thicknesses can be used to absorb more energy thus produce less peak stress, while those with moderate thicknesses are of higher peak efficiency. Although fabrics with larger rigidity and thickness have lower peak stress, which are good for body protection, comfortability should be taken into consideration as well.