Patent ID: 6849314

Claim:
An article comprising: a) a first layer comprising at least one blend selected from the group consisting of: i) a substantially non-vinylidene fluoride, non-vinyl fluoride containing partially fluorinated-thermoplastic and a thermoplastic perfluoropolymer having a melt temperature from about 150 to about 310° C.; ii) two or more thermoplastic perfluoropolymers having a melt temperature from about 150 to about 310° C. and a partially fluorinated-thermoplastic polymer; iii) two or more different partially-fluorinated thermoplastic polymers having interpolymerized units derived from a substantial amount of vinylidene fluoride (VDF), at least one of: tetrafluoroethylene (TFE) and hexafluoropropylene (HFP), and optionall a perfluoro alkyl or alkoxy vinyl ether; iv) three or more partially-fluorinated thermoplastic polymers, wherein the partially fluorinated-thermoplaslic polymers are derived from a combination of interpolymerized units of TFE, HEP, VDF, perfluoro alkyl or alkoxy vinyl ethers, and/or nonfluorinated olefins; and v) a perfluoropolymer having a melt temperature from about 150 to about 310° C.; and from about 5 to about 50 weight percent, based on the fluoropolymer composition, of a partially-fluorinated polymer; wherein the fluoropolymer composition has a Permeation Constant less than about 50% greater than the perfluoropolymer alone; and b) a second layer comprising a polymer bonded to the first layer.