METHOD OF REGENERATING COATED PLASTIC WASTES

摘要

A method of regenerating coated plastic wastes for obtaining a regenerated resin composition for molding, in which plastic wastes coated with urethane film or amino resin film are immersed into treating agent or brought into contact with vapor of treating agent and subjected to hydrolytic treatment of coating film after heated to a temperature below or above melting points of said plastic wastes. With such hydrolytic treatment, coating film is depolymerized, turned into fine grains, and evenly dispersed into parent plastic material. Resin composition thus regenerated for molding is comparable with a non-coated regenerated one in mechanical properties and, thereby, can be utilized in various fields thanks to no reduction in resistance to impact unlike the conventional regenerated plastic material. In addition, treating process can be simplified because of no need of exfoliating the coating film during the regeneration process.