设计图纸CPP薄膜[1]即流延聚丙烯薄膜castpolypropylene,也称未拉伸聚丙烯薄膜,按用途不同可分为通用CPP(GeneralCPP,简称GCPP)薄膜、镀铝级CPP(MetalizeCPP,简称MCPP)薄膜和蒸煮级CPP(RetortCPP,简称RCPP)薄膜等