Patent ID: 7640646

Claim:
A method for producing a composite of an aluminum alloy and a thermoplastic resin, comprising: providing a shaped aluminum alloy material having a surface; treating the surface with an aqueous solution comprising a compound selected from the group consisting of ammonia, hydrazine, a hydrazine derivative, and a water soluble amine compound, in a concentration of 2 to 30%, and at a dipping time of from several minutes to 30 minutes at a temperature in the range of room temperature to 60° C.; and molding a thermoplastic resin directly on the treated surface of the shaped aluminum alloy by injection molding, wherein the thermoplastic resin is made of one selected from the group consisting of a polyalkylene terephthalate, a copolymer consisting essentially of a polyalkylene terephthalate, and a thermoplastic resin composition containing a polyalkylene terephthalate as a component.