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Which kind of films do you want? That really depend on your application.  film for packaging? gas barrier? capacitor? You need consider transparent, strength, elongation, stability, impurity, crystallization, so far so on..  Luckily not like PE with thousands of copolymer, PP only has tens commercially available products on copolymer. Go through a manufacture website, check their data base, and you can find it out.
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