... 缓和时间relaxation time of charge 静置时间time of repose;time of rest 非金属静电导体或静电亚导体与金属导体相互联接时,其紧密接触的面积应大于20cm2。 ...
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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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