Metal resin composite molded body and method for producing same

A method for producing a metal resin composite molded body, comprising:

• a first step of forming the polypropylene resin layer on the metal base by coating, and
• a second step of injection-molding a polyamide resin to the polypropylene resin-coated metal base obtained in the first step to fuse the polypropylene resin layer and the polyamide resin by heat generated at the injection molding;
• and
• the condition of the injection molding in the second step satisfies the equation of T(gap)={(Temperature of the polyamide resin)−(Melting point of polypropylene resin layer)}−{(Melting point of polypropylene resin layer)−(Temperature of die)}≥0.

A method for producing a metal resin composite molded body, comprising:

• a first step of forming the polypropylene resin layer on the metal base by coating, and
• a second step of injection-molding a polycarbonate resin to the polypropylene resin-coated metal base obtained in the first step to fuse the polypropylene resin layer and the polycarbonate resin by heat generated at the injection molding;
• and
• the condition of the injection molding in the second step satisfies the equation of T(gap)={(Temperature of the polycarbonate resin)−(Melting point of polypropylene resin layer)}−{(Melting point of polypropylene resin layer)−(Temperature of die)}≥0.