Study on the Tearing Properties of PVC Coated Bi-axial Warp Knitted Fabrics

摘要

In this paper, tearing behaviors of three kinds of PVC coated bi-axial warp knitted fabrics were studied by using three different tearing methods. The three tearing methods are Trapezoidal, Tongue and Precracked Tearing. The correlations between the results obtained by different tearing methods were obtained. The typical tearing load-extension curves and the influences of different tearing testing conditions are analyzed. The results show that the tearing properties of the coated bi-axial warp fabrics are different from those of the coated woven fabrics and depend on the tearing directions, structural parameters of the samples and tearing methods. The precracked method gives higher resistance against tearing propagation. Moreover, the results show that the trapezoidal and precracked tearing methods present a strong linear correlation. There is no linear correlation between tongue and trapezoidal methods and between tongue and precracked methods.