Method of sorting mixed plastics

An object of the present invention mainly be continuously large quantities processed, and polyethylene and / or polypropylene, intended for polyethylene terephthalate bottle scrap composed of polystyrene and polyesters, fractionation polyester component of the high purity in high yield at to provide a method of recovering. An object of the present invention, the pre-crushed plastic as water slurry, and water at a constant speed range, as swirl flow in a cylindrical vessel occurs by supplying a water slurry to rise at a constant speed range, a cylindrical large polyester specific gravity as deposited ingredients of the bath, it can be solved by a method of separating waste plastics and recovering the light plastic specific gravity as an overflow component from the cylindrical tank top.