since their surfaces are inactive , polyolefin resins are difficult to plate . a plating method utilizing sensitizing - activation of the surface has been used for plating polyolefin resins . many attempts have been made to improve the plating properties of the surfaces of polyolefin resins , for example , a mechanical method , a method employing a solvent , a method of coating other types of resins on the surface , etc . as methods modifying the plastics themselves , there are several ; a method of introducing polar radicals by graft polymerization , etc ., a method of introducing atactic polypropylene or block copolymer of polypropylene and polyethylene , a method of mixing rubber or a copolymer of ethylene and vinyl acetate , a method of mixing in an inorganic filler , etc . recently , it was attempted to apply a high chrome etching - catalyst method for plating polyolefin resin , said method being mainly used in the automatic process of plating although the plating adhesion is poorer than that obtained with the plating method of sensitizing - activation . however , there was found no polyolefin resin composition having plating properties that can compare with abs resin for applying the plating method of a high chrome etching - catalyst method . we have developed a polyolefin resin composition which can be plated by a high - chrome etching - catalyst method . as a result , we have found that the object of the invention can be attained by blending a compound containing a cyano group with a mixture consisting of polyolefin resin and inorganic filler , and kneading and melting them .