Abstract: The surface of an aluminum alloy shaped product is covered with ultrafine recesses by being dipped in an eroding aqueous solution, or has formed thereon a metal oxide layer covered with the openings of ultrafine pores by anodizing. On the resin side, there is prepared a polyamide resin compounded with an impact resistance modifier, a mixture of an aliphatic polyamide and an aromatic polyamide, or a mixture of aromatic polyamides. The aluminum alloy shaped product is inserted into an injection mold, and a polyamide-type resin composition is injected onto the surface of the aluminum alloy shaped product, to manufacture an integrated composite.

Abstract: Combining good metal chassis and good synthetic resin structures, achieving mass production with high productivity, and enabling free design of shapes and structures, are all important considerations in electronic devices, household electric appliances and the like. Moreover, the need for components that are useful in reducing the weight and increasing the strength of various parts and structures is not restricted to electronic devices and household electric appliances. The surface of an aluminum alloy shaped product is covered with ultrafine recesses by being dipped in an eroding aqueous solution, or has formed thereon a metal oxide layer covered with the openings of ultrafine pores by anodizing. On the resin side, there is prepared a polyamide resin compounded with an impact resistance modifier, a mixture of an aliphatic polyamide and an aromatic polyamide, or a mixture of aromatic polyamides.