METHOD FOR SEPARATION BY DECREASING VOLUME OF THERMOPLASTIC RESIN FOAMED MATERIAL LAMINATED BODY

摘要

PROBLEM TO BE SOLVED: To provide a method for separating and classifying, for a short time, a bulky thermoplastic resin foamed material laminated body likely comprising foamed polystyrene and a plasterboard simply into the original foamed polystyrene and the plasterboard by easily decreasing a volume. SOLUTION: By adding heat at a softening temperature of a thermoplastic resin foamed material laminated body and a heat expansion temperature of a bond layer to a thermoplastic resin foamed material laminated body by being bonded to a base material via the bond layer having a heat expandable function formed by a bonding agent capable of being bonded to a thermoplastic resin foamed body. (1) The thermoplastic resin foamed body is reduced in volume by destroying foaming of the thermoplastic resin foamed material and (2) the thermoplastic resin foamed material of which the volume is reduced, is separated from the base material using the expanded bonding layer as an interface by expanding the bond layer to provide a method for separation by volume reduction of the thermoplastic resin foamed material laminated body.