ORIENTED FLUOROPOLYMER FILM

摘要

The present invention provides oriented film comprising the composition 55 to 95 wt% tetrafluoroethylene/hexafluoropropylene/perfluoro(alkyl vinyl ether) copolymer and 45 to 5 wt% tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer to total 100 wt% based on the combined weight of said copolymers, wherein the alkyl in each copolymer comprises 1 to 4 carbon atoms and wherein the presence of the tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer in the composition and the presence of perfluoro(alkyl vinyl ether) in both copolymers improves the thermoformability of the film as compared to oriented film of the same film thickness comprising the tetrafluoroethylene/hexafluoropropylene/perfluoro(alkyl vinyl ether) copolymer by itself.