Plastic Injection Materials—Specific Gravity

The density of a material used to compare with that of a specific material ( as a standard)(such as the water with maximum density under 4 degrees C) (the density of both acquired through weighing in the air). Such result is a dimensionless quantity. When density is larger than 1, it sinks in water, while less than 1, it floats over pure water. When we take materials other than pure water as reference strain, it is refered to as relative proportion.


material
specific gravity/density
talcum powder
2.8
calcium carbonate
2.7
glass fiber
2.54
PVC
1.4
POM
1.41
PET
1.34
PBT
1.31
PC
1.2
Nylon 6
1.14
Nylon 66
1.14
MPPO
1.07
PS
1.05
ABS
1.04
HDPE
0.95
LDPE
0.92
PP
0.90

English abbr
content of glass fiber
specific gravity/density
[%]
[g/cm3]
PS
1.05
HI-PS
1.05
SAN
1.08
ABS
1.06
ASA
1.07
LDPE
0.954
HDPE
0.92
PP
0.915
PP+GF
30
1.15
PVC-soft
1.38
PVC-rigid
1.38
PVDF
1.78
PMMA
1.18
POM
1.42
PPO
1.06
PPO+GF
30
1.27
CA
1.27-1.3
PC
1.2
PC+GF
10-30
1.42
PBT
1.3
PBT+GF
30-50
1.52-1.57
PA6
1.14
PA6+GF
30-50
1.36-1.65
PA66
1.15
PA66+GF
30-50
1.20-1.65
PA11
1.03-1.05
PA12
1.01-1.04
PPS
40
1.64

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