EFFECTS OF PHYSICAL SURFACE TREATMENT ON METAL SURFACE MORPHOLOGY AND MECHANICAL PROPERTIES OF METAL INSERT INJECTION MOLDINGS

摘要

Engineering plastics are generally used together with metal and most of them are fabricated by insert injection molding process at present. However, the adhesion property between metal and plastic is still low, which limited its application as a serious problem. Therefore, this study is to clarify the adhesion mechanism as target. Various surface treatments on the metal were carried out to investigate its effect on the adhesion property of insert moldings. It is found that the surface roughness of metal could be changed by the chemical agent with different ratio of nitric hydrofluoric acid and immersion time. Optimum surface treatment exists to obtain high adhesion property between polymer and metal.