SPECIFIC GRAVITY- The ratio of the weight of the molded piece as compared to the weight of an equal volume of water ASTM D792.
Polybutylene 0.60
Polymethylpentene 0.83
Ethylene-propylene 0.86
Polypropylene 0.90-0.92
Polyethylene
LDPE 0.90-0.93
VLDPE 0.79-0.85
LLDPE 0.91-0.94
HDPE 0.96-0.97
Polybutene 0.91-0.92
Natural rubber 0.91
Butyl rubber 0.92
Styrene-butadiene 0.93
Polyamide
PA-12 1.02
PA-11 1.04
PA-6 1.12-1.13
PA-66 1.13-1.15
ABS 1.04-1.07
Polystyrene 1.05
Polyacrylonitrile 1.17
Polyvinyl acetate 1.19
Polycarbonate 1.2
Polychloroprene rubber 1.23
Polysulphone 1.24
Polyethylene terephtalate 1.34-1.39
PVC 1.37-1.39
POM 1.41-1.43
Polytetrafluorethylene 2.27