Abstract: By preparing a polyimide film with a face at the support side and subjected to a surface treatment; subjecting at least one of a face of the support and the face of the polyimide film which are opposite to each other to a patterning treatment using a coupling agent to form a satisfactorily bondable part and an easily releasable part which differ in adhesion/peel strength; subsequently, superposing the support and the polyimide film to be subjected to a pressurizing/heating treatment and to be bonded to each other, subjecting the surface of the polyimide film to an organic alkali treatment; and then, applying a polyamic acid solution free from a slip agent ingredient, drying the coating film and imidizing the film, a layered product having a structure of at least three layers in which at least one layer contains a slip agent material and both surface layers have no slip agent material is produced.

Abstract: By preparing a polyimide film with a face at the support side and subjected to a surface treatment; subjecting at least one of a face of the support and the face of the polyimide film which are opposite to each other to a patterning treatment using a coupling agent to form a satisfactorily bondable part and an easily releasable part which differ in adhesion/peel strength; subsequently, superposing the support and the polyimide film to be subjected to a pressurizing/heating treatment and to be bonded to each other, subjecting the surface of the polyimide film to an organic alkali treatment; and then, applying a polyamic acid solution free from a slip agent ingredient, drying the coating film and imidizing the film, a layered product having a structure of at least three layers in which at least one layer contains a slip agent material and both surface layers have no slip agent material is produced.

Abstract: To provide a solid polymer electrolyte composition that can improve oxidation resistance without causing decrease in proton conductivity, elution of added components and the like, and an ion-exchange membrane, a membrane electrode assembly and a fuel cell, each using the composition. It is possible to obtain a solid polymer electrolyte composition having excellent oxidation resistance without causing decrease in proton conductivity, elution of added components and the like, by mixing an aromatic hydrocarbon-based polymer electrolyte, a phosphorus-containing polymer compound and a metallic element.