| 摘要 |
A metal and resin composite in which a metal and a resin, especially a shaped base made of an ordinary steel material and a resin composition can be strongly joined to and integrated with each other; and a method for producing the composite. The surface of a shaped ordinary steel material is treated by chemical etching or the like to form a thin layer of a natural oxide of iron, substantially completely covered with ultra-fine irregularities, onto which hydrazine, ammonia or a water-soluble amine is chemically adsorbed. The resulting ferrous material shaped article 1 is inserted into an injection mold 10 and a specific resin composition 4 is injected thereinto. The surface of the ferrous material formed-article 1 may have a thin layer of a metal oxide or metal phosphate. The above injection yields a composite 7 in which an ordinary steel material is strongly joined to a resin. The resin composition 4 that is used contains a crystalline polyphenylene sulfide resin (PPS) or polybutylene terephthalate resin (PBT) as the main resin component.
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