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HDPE vs. Unfilled PET

Both HDPE and unfilled PET are thermoplastics. There are 9 material properties with values for both materials. Properties with values for just one material (20, in this case) are not shown.

For each property being compared, the top bar is HDPE and the bottom bar is unfilled PET.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 1.0 to 1.3
1.4
Elongation at Break, % 2.5 to 100
70
Impact Strength: Notched Izod, J/m 50 to 260
43
Maximum Temperature: Mechanical, °C 90
80
Specific Heat Capacity, J/kg-K 1330 to 2400
1150
Strength to Weight: Axial, points 6.9 to 17
12
Strength to Weight: Bending, points 19 to 32
25
Tensile Strength: Ultimate (UTS), MPa 24 to 80
60
Water Absorption At Saturation, % 0.1 to 0.3
0.5