弹力针织物的疲劳测试方法

本文对经编弹力针织物氨纶丝疲劳和抽拔试验方法进行了研究。首先测试与分析了初伸长和往复拉伸对经编弹力针织物疲劳和抽拔的影响及其显著性。然后结合试穿结果，测试分析了试样有初伸长和无初伸长试验方法氨纶丝疲劳和抽拔的差异。研究结果表明：随着初伸长率的增加，疲劳现象严重，初伸长率对织物的变形率、回复率及氨纶丝疲劳级数有显著影响；随着往复拉伸率的增加，疲劳和抽拔现象的增加，往复拉伸率对织物的变形率、回复率及氨纶丝疲劳级数及抽拔根数有显著影响；有初伸长疲劳试验的结果更符合实际穿着情况；有初伸长疲劳试验的初伸长率为60%，往复拉伸动程≤拉伸隔距的80%。其研究结果对氨纶弹力针织物疲劳试验具有一定的参考价值。

Research on test method for spandex fatigue of elastic warp knitted fabrics

Abstract In this paper, testing method for spandex fatigue and runback of elastic warp knitted fabrics was studied. First influences and significances of initial elongation and reciprocating stretching on spandex fatigue and runback of elastic warp knitted fabrics were tested and analyzed. And then differences in spandex fatigue and runback of initial elongation and no initial elongation test were analyzed, combined with results of trying on shorts. The results show that fatigue is serious as the increase of initial elongation percentage and initial elongation percentage has significant influence on deformation rate and reversion rate and fatigue grade，that fatigue and runback are serious as the increase of reciprocating stretching percentage and reciprocating stretching percentage has significant influence on deformation rate and reversion rate and fatigue grade e and runback. Fatigue test results of no initial elongation conform to actual wearing, which initial elongation percentage is 60%，reciprocating stretching percentage is less than 80% the gauge length. The research results can provide a certain reference to fatigue and runback test for elastic warp knitted fabrics.