METHOD OF FRACTIONATING RESIN IN MULTILAYER PLASTIC VESSEL BY STATIC ELECTRICITY AND CRUSHED CHIPS OF MULTILAYER PLASTIC VESSEL USED FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method of precisely and inexpensively fractionating a multilayer plastic vessel formed from a laminated body composed of different resins to recycle and crushed chips of the multilayer plastic vessel which are capable of efficiently being fractionated in the fractionating method. SOLUTION: The multilayer plastic vessel formed from the laminated body composed of 2 or 3 kinds of the different resins is crushed into fragments having 5-15 mm major diameter with a blade having a dull edge to simultaneously strip off the laminated surface to form a mixture of resin crushed chips separated into respective resins. The mixture is controlled to <=0.5% water content and resin crushed chips are charged to (+) or (-) respectively in every resins by friction and the charged resin crushed chips are applied to a resin fractionation apparatus to fractionate and recover each resin. It is desirable that the resin crushed chips are heated before the fractionation to be shrunk and curled.