Abstract: A release layer of a release film for producing a membrane electrode assembly of a polymer electrolyte fuel cell comprises a cyclic olefin polymer comprising an olefin unit having a C3-10alkyl group as a side chain thereof. The release layer may have a glass transition temperature of about 210 to 350° C. The release layer may have a transition point of a dynamic storage modulus E? in a range from ?50 to 100° C. An ion exchange layer comprising an ion exchange polymer may be laminated on the release layer of the release film by a roll-to-roll processing to produce a laminate. The release film may be separated from the laminate to give the membrane electrode assembly. The release film achieves improved production of a membrane electrode assembly (an electrolyte membrane and/or an electrode membrane) of a polymer electrolyte fuel cell.

Abstract: A curable composition for forming at least one layer of two adjacent hardcoat layers included in a hardcoat laminate contains at least one adhesion-imparting component selected from a mono(meth)acrylate having an oxygen-containing heterocyclic group, a mono(meth)acrylate having an aliphatic hydrocarbon group, a mono(meth)acrylate having a crosslinked cyclic hydrocarbon group, a mono(meth)acrylate having an allyloxy group, a polymer of a mono(meth)acrylate having an allyloxy group, a multibranched polyvinyl compound having a weight-average molecular weight of not less than 1000, a di(meth)acrylate having a crosslinked cyclic hydrocarbon group, an alkanediol di(meth)acrylate, and a polyalkylene glycol di(meth)acrylate. A hardcoat laminate obtained therefrom has prevented or reduced occurrence of separation, breakage, and/or cracks in punching.

Abstract: A release layer of a release film for producing a membrane electrode assembly of a polymer electrolyte fuel cell comprises a cyclic olefin polymer comprising an olefin unit having a C3-10alkyl group as a side chain thereof. The release layer may have a glass transition temperature of about 210 to 350° C. The release layer may have a transition point of a dynamic storage modulus E? in a range from ?50 to 100° C. An ion exchange layer comprising an ion exchange polymer may be laminated on the release layer of the release film by a roll-to-roll processing to produce a laminate. The release film may be separated from the laminate to give the membrane electrode assembly. The release film achieves improved production of a membrane electrode assembly (an electrolyte membrane and/or an electrode membrane) of a polymer electrolyte fuel cell.