Abstract
This paper describes the conditions of pre-etching and etching of polypropylene homopolymers for adhesion of electroplated metals. The results obtained were as follows. The pre-etching treatment had a very remarkable effect on the adhesion between polypropylene resins and metals. There was no change observed on the directly etched surface layers of polypropylene; but complicated etching patterns having polar groups were formed on the surface layers which had been treated with a pre. etching reagent followed by etching. Under proper conditions of experiments, the crystallinity of preetched polypropylene resins on the surface layers were lowered so that the resins were swollen and easily subject to etching.
