Uthotho lwe-CT yi-extruder screw enye yokuphinda isetyenziswe iiflakes zePET.Idizayini ye-PET flakes yegranulation line njengendibaniselwano yesikrufu esinye se-screw extruder kunye nenkqubo esebenza ngokucokisekileyo yevacuum ilungelelanisa yonke inkqubo, kodwa igcina iipellets zokugqibela zikumgangatho olungileyo.