Polypropylene: Plastic film rather like clear polythene. Its oriented form is the most common material for film lamination. See OPP film.

• 聚丙烯:一种塑料胶膜，它和透明的聚乙烯相似。向性化的聚丙烯是最常用的裱胶材料。参阅向性聚丙烯胶膜。