采用美国Miocon公司的3/33MG透湿仪和2/21MH透氧仪在不同相对湿度(RH)下对聚乙烯醇(PVA)膜的水蒸汽透过率(WVTR)、氧气透过率(OTR)进行了一系列测量,并在此基础上分析了RH变化对PVA膜阻隔性能的影响规律.实验结果表明,湿度越大,聚乙烯醇膜的WVTR、OTR越大,且聚乙烯醇膜的氧气和湿气透过率与相对湿度间存在指数关系.
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