CPP (Cast Unoriented Polypropylene) is a cost-effective, low density, high-performance transparent cast polypropylene film. CPP films are often seen as having optical clarity, high gloss, good seal strength, and machinability, and are resistant to tears and punctures. These characteristics make this plastic good for the medical, food packaging, and textile industries to name a few. Markets / Industries: Medical Device / Diagnostic Strips, Transportation, Industrial Film and Adhesives, Packaging, Food and Beverage
CPP薄膜 即流延聚丙烯薄膜cast polypropylene，也称未拉伸聚丙烯薄膜，按用途不同可分为通用CPP（General CPP，简称GCPP）薄膜、镀铝级CPP（Metalize CPP，简称MCPP）薄膜和蒸煮级CPP（Retort CPP，简称RCPP）薄膜等。
CPP是塑胶工业中通过流延挤塑工艺生产的聚丙烯(PP)薄膜。该类薄膜与BOPP(双向聚丙烯)薄膜不同，属非取向薄膜。严格地说，CPP薄膜仅在纵向(MD)方向存在某种取向，主要是由于工艺性质所致。通过在冷铸辊上快速冷却，在薄膜上形成优异的清晰度和光洁度。
