RECOVERY OF RESIN

摘要

PURPOSE:To reutilize an optical recording medium treated as industrial waste heretofore by recovering a resin from the optical recording medium made of a transparent resin having a protective coating film applied thereto. CONSTITUTION:An optical recording medium made of a transparent resin having a protective coating film applied thereto is subjected to ultrasonic treatment in a diluted aqueous acid soln. with pH of 3.0 or less to release and separate the protective coating film and the remainder is washed and dried to recover the resin.