纺织品抗渗水性测试静水压法的对比分析

Comparison and research about resistance to water penetration-hydrostatic pressure test methods for textile

本文对纺织品常用的抗渗水性测试4种静水压方法进行对比分析,通过对常见的防水面料测试终点现象的观测分析、加装金属网方法和不加金属网方法测试比对、慢速升压法和快速升压法测试比对,分析不同防水面料的抗渗水性能。结果表明:多层复合面料、覆膜面料在抗渗水性测试时经常得到较高的静水压值,且常无法观测到典型的第3处水珠出现的情况,这会影响试验者对终点的判定而导致测试结果出现差异。测试时加装金属网使得织物表面受力分散,可有效防止样品在受压过程中过度形变,但往往得到更高的静水压值;快速升压法测试过程中常常水尚未渗透到织物表面即达到样品本身的压力上限导致样品爆裂而试验终止,这种方法更适用于自身压力值远高于静水压值的样品。

4 kinds of hydrostatic pressure methods commonly used of resistance to water penetration testing were compared and analyzed in this paper.Through observation and analysis the test end point phenomenon of common waterproof fabric,test comparison between the method with metal mesh and without metal mesh,and test comparison between the low hydraulic pressure method and the high hydraulic pressure method,to analyze the resistance to water penetration performance of different waterproof fabrics.The results show that,the multi-layer composite fabric and coated fabric often obtain higher hydrostatic pressure value in the test,and the typical third spot of water droplets cannot be observed,which will affect the determination of the end point of the experimenter and lead to the difference of the test results.the metal mesh installed in the test can disperse the force on the fabric surface,which can effectively prevent the sample from excessive deformation during the pressure process,but often obtain a higher hydrostatic pressure value.In the test process of high hydraulic pressure method,the water has not penetrated the fabric surface before reaching the pressure limit of the sample itself,causing the sample to burst and testing termination.This method is more suitable for the sample whose pressure value is much higher than the hydrostatic pressure value.