PRODUCTION OF POLYCARBONATE MOLDING WHICH PERMITS PARTIAL TRANSMISSION OF LIGHT

摘要

PURPOSE:To obtain a partially light-transmittable molding of a polycarbonate resin which is previously considered impossible by applying a light transmittable silicone high polymer compd. on both surfaces of a polycarbonate resin molding having transparency and light transmittability and drying the compd. then dipping the molding in an etching soln. and further forming light non-transmittable plating thereon. CONSTITUTION:A silicone-varnish high polymer compd. which itself has light transmittability is partially printed or coated on both surfaces of a polycarbonate resin molding which is colorless or is colored and has transparency and light transmittability then the coated compd. is dried. The drying is accomplished at 80-100 deg.C then the part except the cured coating film obtd. by such process is treated with an org. solvent or chemical etching soln. and thereafter the molding is dipped in a catalyst soln. consisting of palladium chloride to deposit and stick the nuclei of Pd thereto. The deposited film of metallic Ni, etc. is formed thereon. The electroless plated molding is dipped in a soln. consisting of copper sulfate, etc. to form metallic copper atop the electroless plating with electrolysis. The molding is further dipped in a soln. consisting of nickel sulfate, etc. to form bright nickel plating atop the same with electrolysis. The polycarbonate molding which permits partial transmission of light is thus obtd.