外文翻译---微孔膜防水透湿织物热湿传递中织物表面凝结(编辑修改稿)

外文翻译---微孔膜防水透湿织物热湿传递中织物表面凝结(编辑修改稿)内容摘要：

le Condensation, which occurs under these circumstances, leads to disfort with its associated consequence in wear. 3 From a physiological point, fort can be defined as the state that maintains the skin at a temperature of 33177。 2176。 C and a relative。 humidity of less than 100%. . no liquid water on the skin surface. This state is controlled by the escape of body produced water vapor and the clothing ability to transmit the water vapor. Table l lists the amount of water vapor produced by the body in different activities and indicates how much water vapor must be lost for fort to be achieved. shows the model of water vapor transfer mechanism in difference fabrics and shows that condensation depends upon the properties of the fabrics. The more difficult the water vapor transfer through the fabrics is .the greater are the water vapor concentrations at the inner fabric surface. Samples To investigate the condensation formed on the inner fabric surface,14 fabrics are listed in table 2. Three specimens shall be tested by the same method .They include the conventional fabrics, tightly woven fabrics。 microporous film fabrics and nonporous film fabrics. Microporous film fabrics .such as PTFE laminated fabrics(known as breathable fabrics)have very small porous, which allow water vapor to diffuse through but prevent liquid water peration. Water vapor can be absorbed by an other type of breathable 4 fabrics(nonporous hydrophilic film fabric)and be transferred through the fabrics and emitted in to the air spaces by desorptions. Tightly woven fabrics using the socalled microfibers that are less than 1 decitex per fiber can be woven so densely that no interstices can be seen between the fibers and thus they resist water peration. Conclusion To investigate the mechanism of condensation occurred on the fabrics, a new measuring apparatus were made to obtain temperature and relative humidity simultaneously .The。