Polimery 1998, No 1, 1
Noncomminuted plastics wastes can be sorted manually or mechanically by using differences in optical, chemical, electrostatic, or temperature-dependent properties. Comminuted wastes can be sorted by Rusing differences in density ("swim-drown" technique; hydrocyclone; centrifuge) or wettability, and electrostatic or chemical properties. Flowsheets are given. Three technical solutions are discussed, viz., the „yellow bag" installation (Duales System Deutschland), constructed by Thyssen-Henschel and operatem since January 1995; the hydrocyclone installation; and the centrifuge installation constructed by Rethman (Luenen) and operated since June 1996. Sorting is important for downstream processing of the recyclate.
Keywords: plastics wastes, sorting equipment, commercial sorting installations