The influences of PU mass fraction and the time of repose on the moisture vapor permeability of PU thin membranes were studied.

试验结果表明，随着质量分数的增加，聚氨酯薄膜的透湿量逐渐减小；

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Air permeability, water vapor permeability, moisture absorption, heat preservation and antimicrobial ability are the main performance indicators of hygienic property of leather shoes.

透气性、透水汽性、吸湿性、保暖性、抗菌性等是皮鞋卫生性能的主要指标，分析了皮鞋上述几方面指标国内外的研究现状和发展趋势。

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This result showed that the change of relative humidity led to the variation in mechanical properties, water vapor permeability (WVP), oxygen permeability and moisture absorption of the films.

结果表明，由于蛋白腹为亲水性膜，受环境湿度的影响，其水分含量、分子间作用力有所不同，从而导致蛋白膜的机械性能、透湿性和吸湿率也随之发生变化。

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