The method 1, wherein the splitting up includes splitting up {HEAD ~ the remaining fraction} high in {TAIL ~ plastics} into the light fraction and the heavy fraction by air sifting 
high in
The method 1 , wherein the splitting up includes splitting up { HEAD ~ the remaining fraction } high in { TAIL ~ plastics } into the light fraction and the heavy fraction by air sifting
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH