MOLD RELEASING FILM, LAMINATE, PRODUCING METHOD THEREOF, AND METHOD FOR PRODUCING FUEL BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a mold releasing film which enables the increase in the productivity of a film-electrode assembly (electrolytic film and/or electrode film) of a solid polymer type fuel battery.SOLUTION: A mold releasing film for producing a film-electrode assembly of a solid polymer type fuel battery comprises a release layer formed by a cyclic olefin-based resin including an olefin unit having an alkyl group with 3-10 carbon atoms in its side chain. The release layer may have a glass transition temperature of 210-350°C, approximately. The dynamic storage elastic modulus E' of the release layer may have a transition point in a range of -50 to 100°C. A laminate may be produced on the release layer of the mold releasing film by thereon laminating an ion-exchange layer including an ion exchange resin by a roll-to-roll method. The film-electrode assembly may be produced by stripping the mold releasing film from the laminate.