Spacer fabrics' protection capabilities for human body (support) under particular impact energy were investigated. The samples were 6 warp-knitted spacer fabrics with different structures, i. e. needle pitch of shogging motion of the guide bars of spacer yarns, spacer-yarns' diameter and fabric thicknesses were produced on double-needle-bed raschel knitting machine. The characteristics of stress, energy and energy-absorption efficiency of individual fabrics under a given impact were analyzed and the results showed that; with the decreasing of needle pitch of guide bars and increasing of spacer-yarns' diameter, the peak stress drops, and 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. Relatively-thick fabrics can absorb more energy and thus produce less peak stress, while moderately thick fabrics have higher energy-absorption peak efficiency. Fabrics with greater rigidity and thickness are good for body protection due to their lower peak stress, but comfortability should be taken into consideration when choosing fabric structures.%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,采用在拉舍尔双针床经编机上编织的6种不同结构(不同间隔梳栉横移针距数、间隔丝直径和织物厚度)的间隔织物进行冲击性能试验,分析了不同织物的应力、能量和能量吸收效率特征.试验结果表明,随着间隔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,但间隔丝排列过于接近垂直的织物时容易发生倒伏,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.
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