织物透湿性测试新方法

新型织物透湿性测试装置用防水透湿PTFE薄膜包覆透湿圆柱筒的底部,形成饱和水蒸气,使用干燥氮气流作为载体,将透过织物的水蒸气带走,通过测量出口氮气流的相对湿度来确定织物的透湿量。实验结果表明,这种测试方法能在5 min内准确地评价织物透湿性,试样透湿量的变异系数小于1%。该方法具有测试时间短,重复性好,灵敏度高和成本低的特点,可用于纺织生产厂家对产品透湿性的日常质量控制。

New method for evaluating water vapor permeability of fabrics

t The new apparatus for determining water vapor permeablity of fabric utilizes waterproof vaporpermeable PFFE membrane to cover the base of moisture permeation cylinder, providing the source of saturated water vapor. The dry nitrogen stream is used as the carrier to get the vapor penetrating the fabric away. The water vapor transmission rate can be determined by measuring the relative humidity of outgoing nitrogen stream. The test results indicate that this test method is able to accurately evaluate the water vapor permeability of fabric within 5 minutes, and the coefficient of variance is less than 1% for water vapor permeability of the fabric tested, Therefore, this test method offers short test time, good repeatability, high sensitivity and less cost. It is very useful for routinely testing the water vapor permeability of fabrics for quality control of the textile plants,