Explanation of Science

The densities of the polymers are as follows:

• Recycle code 1, PET, polyethyleneterphthalate, 1.39 g/mL
• Recycle code 2, HDPE, high density polyethylene, 0.95-0.97 g/mL
• Recycle code, 3, PVC, polyvinylchloride
• Recycle code 4, LDPE, low density polyethylene, 0.92-0.94 g/mL
• Recycle code, 5, PP, polypropylene, 0.90-0.91 g/mL
• Recycle code, 6, PS, polystyrene, 1.05-1.07 g/mL
• PMP, poly-4methyl-1-pentene, 0.83 g/mL
• Plexiglas, polymethyl metacrylate 1.24 g/mL
• PTFE, Teflon, polytetrafluoroethylene, 2.2 g/mL