Patent ID: 8409379

Claim:
A transparent multilayer film laminate comprising: A. a first film layer comprising a fluorinated copolymer resin composition wherein i) the fluorinated copolymer comprises copolymerized units of tetrafluoroethylene and at least one comonomer selected from the group consisting of ethylene, perfluorinated comonomers, and combinations thereof, and ii) at least one surface of the first film layer has been modified by a surface treatment; B. a second film layer comprising a polymeric material comprising a terpolymer consisting essentially of copolymerized units of i) ethylene; ii) a first olefin of the formula CH 2 ═C(R 1 )CO 2 R 2 , wherein R 1 is hydrogen or an alkyl group having 1 to 8 carbon atoms and R 2 is an alkyl group having 1 to 8 carbon atoms; and iii) a second olefin of the formula CH 2 ═C(R 3 )D, wherein R 3 is hydrogen or an alkyl group having 1 to 8 carbon atoms, and D is —CO 2 R 5 —R 4 , wherein R 4 is a moiety containing an epoxy group and R 5 is an alkylene group having 1 to 8 carbon atoms; wherein a surface of the second film layer is adhered to the modified surface of the first film layer and the multilayer film laminate has an average peel strength between the first film layer and the second film layer of greater than 5 lbf/in, measured after exposing the multilayer film laminate to conditions of 85° C. and 85% relative humidity for 1000 hours.