Water Vapor Transport through Fabrics under Subzero Climate

In this paper, a novel apparatus is repord on, which is used to measure the moisture transport through fabrics under a conventional and subzero climatic condition. Experimental results show that, under both conventional (20℃) and subzero (-20℃) climate, the accumulation of condensates on fabric surfaces increases almost linearly with time and the rate of moisture transfer through fabrics is little affected by the accumulation of condensates on fabric surfaces. Nevertheless, the water evaporation from the water bath, condensation on fabric surface and vapor transmission through the fabric is greater and the moisture vapor resistance smaller under the subzero (-20℃) climate than those under the conventional (20℃) climate.