Patent ID: 7919032

Claim:
A process producing a composite of an aluminum material and a synthetic resin molding characterized in that it comprises (a) an aluminum raw material in an electrolytic bath of phosphoric acid or sodium hydroxide is soaked, and then surface(s) thereof is/are subjected to an anodic oxidization treatment by a direct current electrolysis to form an anodic oxidation coating comprising innumerable pores having a diameter of 25 nm to 90 nm with a depth of about 1 to 1.5 μm made open innumerably in the surface(s) thereof and (b) a portion or whole of the aluminum material with the anodic oxidation coating is then placed in a cavity in a predetermined shape in a metal mold, and molten synthetic resin is injected toward the partially or wholly exposed surface of the anodic oxidation coating in the cavity so that the molten synthetic resin may be invaded into the innumerable pores having a diameter of 25 nm to 90 nm with a depth of about 1 to 1.5 μm innumerably made open in the surface and also may be filled in the cavity under pressure to be molded.