▎ 摘　　要

NOVELTY - Electroless plating of a synthetic resin material involves injection molding a synthetic resin material, degreasing by immersing the injection-molded synthetic resin material in degreasing solution containing triethanolamine, chemically etching and neutralizing the degreased synthetic resin material, immersing chemically etched and neutralized synthetic resin material in catalyst solution containing palladium chloride, hydroxylamine sulfate, hydroxybenzoic acid and an aqueous sulfuric acid solution by catalytic treatment, forming pattern by irradiating a laser and etching nickel plated layer of the synthetic resin material, immersing the synthetic resin material, forming a copper plating layer by copper plating the chemically etched synthetic resin material, dark chrome plating copper-plated synthetic resin material to form chrome plating layer, peeling the chromium-plated synthetic resin material using nitric acid, and washing and drying the peeled synthetic resin material with water. USE - Electroless plating of synthetic resin material used as lighting components mounted on interior materials of automobiles. ADVANTAGE - The method enables electroless plating of synthetic resin material with improved adhesiveness between the plating layer, excellent durability and external appearance through a thick plating layer, and suppressed interlayer lifting. DETAILED DESCRIPTION - Electroless plating of a synthetic resin material involves injection molding a synthetic resin material, degreasing by immersing the injection-molded synthetic resin material in a degreasing solution containing triethanolamine, chemically etching and neutralizing the degreased synthetic resin material, immersing the chemically etched and neutralized synthetic resin material in a catalyst solution containing palladium chloride, hydroxylamine sulfate, hydroxybenzoic acid and an aqueous sulfuric acid solution by catalytic treatment, forming a nickel plating layer having a thickness of 0.05-5.0 mu m on the surface of the synthetic resin material by electroless nickel plating on the catalyst-treated synthetic resin material, forming a pattern by irradiating a laser and etching the nickel plated layer of the synthetic resin material, immersing the synthetic resin material on which the pattern is formed in a secondary chemical etching solution containing hydrochloric acid, hydrogen peroxide and graphene oxide colloid to perform secondary chemical etching at a temperature of 25-50 degrees C, forming a copper plating layer having a thickness of 0.5-10 mu m by copper plating the secondary chemically etched synthetic resin material, dark chrome plating the copper-plated synthetic resin material to form a chrome plating layer having a thickness of 0.5-10 mu m, peeling the chromium-plated synthetic resin material using nitric acid having a concentration of 1-65%, and washing and drying the peeled synthetic resin material with water.