织物的孔隙特征与透气透湿性研究

Study on Fabric Feature and Air Permeability & Moisture Penetrability

研究织物的孔隙特征与透气透湿关系。对4种涤纶织物分别进行压汞法测试,得到了各织物的孔隙率、总孔面积、孔容、平均孔径等数据,与测试的织物透气率与透湿量进行了分析。结果表明:织物中孔隙之间的连通性较好,有利于织物的透通性;织物的孔隙体积增量与孔径关系曲线图存在两个波峰,分别表征纤维间孔隙和纱线间孔隙;透气率与孔隙率总体呈正相关,但透湿量并不总是与织物的孔隙率保持一致。认为:压汞法可以得到织物内部孔径的各参数,且数据较准确,可适宜于研究织物相关性能。

The relationship between fabric porosity feature and air permeability & moisture penetrability was studied.Mercury Intrusion porosimetry was used on four kinds of polyester fabric.The porosity,total pore area,pore volume,average pore diameter and so on of each fabric were obtained.They were analyzed together with the test results of fabric air permeability and moisture penetrability.The test results showed that the connectivity of the pores in the fabric was better.It was beneficial to the fabric penetrability.There were two peaks in the relationship curve between fabric pore volume increment with pore diameter.They represented the pore among fibers and the pore among yarns respectively.Positive correlation was shown in general between air permeability and porosity.However,the amount of water vapor transmission did not always stay the same with the fabric porosity.It is considered that all the pore parameters inside of the fabrics can be obtained by mercury intrusion porosimetry.And the data are quite accurate.It is suitable for the study of fabric relative properties.