CPP(cast polypropylene film 流延聚丙烯薄膜)，流延是一种塑料成型技术，和吹塑薄膜相比，其特点是透明度好、平整度好、生产速度快，经过表面电晕处理后可以用于彩印、复合、镀铝等方面，因而广泛用于食品、日用品、纺织品的包装。
    CPP Stands for Cast Polypropylene.Casting is a manufacturing process by which a liquid material is usualiy poured into a mold. Compared withblown film,Cast film is featured with better transparency and planeness,and quick production rate.After surface corona treatment,it can be used for color prining,compostion and aluminizing,thus become excellent for packaging snacks,daily necessities and textilies.