although polyethylene , polyamide ( nylon ) , polytetrafluoroethylene ( teflon ) , silicone , aluminum , and glass beads contained no quantities of ethylene oxide detectable by gas chromatography after 72 h of aeration , residual amounts were definitely determined , even after 76 h of aeration in polypropylene , polystyrene , polyvinylchloride , paper products , and compound products of various plastics and paper mixtures .
C0032582
polypropylene
C0032167
compound