prov:value
| - The films are preferably made of a polymeric material, e.g., of plastic resins, such as a polyolefin (polyethylene, polypropylene, polypentene), polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polystyrene, polyacrylate (such as polymethyl methacrylate), polyester, polyamide (such as nylon 6 or nylon 66) a polysiloxane, polycarbonate, polyacetate or butyrate, natural or synethic rub
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