延えん伸しんポリプロピレンMeanings1nounoriented polypropylene; OPPchemistryTechnical term in chemistry and materials science for polypropylene film that has been stretched to improve strength and clarity.延えん伸しんポリプロピレンは包ほう装そうフィルムとして広ひろく使つかわれている。Oriented polypropylene is widely used as packaging film.
