Abstract: In a flexible laminate containing a metal foil layer/a thermoplastic polyimide layer or/and a conductor circuit layer/a thermoplastic polyimide layer, the metal foil layer or the conductor circuit layer is bonded to at least one side of the thermoplastic polyimide layer. The thermoplastic polyimide layer is formed from a thermoplastic polyimide resin film or sheet produced by melt extrusion of a thermoplastic polyimide resin. Alternatively, the thermoplastic polyimide layer is formed from a biaxially oriented thermoplastic polyimide resin film or sheet. Such a flexible laminate can be easily manufactured by a lamination method which comprises bonding a thermoplastic polyimide resin film (1) to a metal foil (2) or a conductive circuit layer (4) by heating under pressure, and has excellent heat resistance, electrical properties and mechanical strength inherent in a polyimide.

Abstract: The present invention provides a PFA resin helical blade for use in a compressor, which is superior in dimensional precision and surface smoothness with a superior anti-fatigue property, and a manufacturing method thereof. In a manufacturing method of a compressor-use helical blade of the present invention, a PFA composite resin, which is formed by mixing an inorganic filler with a tetrafluoroethylene/perfluoroalkylvinyl ether copolymer (PFA resin) having a —CH2OH terminal group, which has not been subjected to a stabilizing process, and has fluidity of not ness than 15 g/10 min, is used, and after the resin has been molded into a helical blade through an injection-molding process, the resulting matter is subjected to a heating process at a temperature from 280 to 300° C. for a period from not less than 10 hours to not more than 300 hours.