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LDPE vs. PLA

Both LDPE and PLA are thermoplastics. There are 13 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is LDPE and the bottom bar is PLA.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.3
3.5
Shear Modulus, GPa 0.21
2.4
Tensile Strength: Ultimate (UTS), MPa 7.0
50

Thermal Properties

Glass Transition Temperature, °C -130
60
Melting Onset (Solidus), °C 110
160
Specific Heat Capacity, J/kg-K 2300
1800
Thermal Conductivity, W/m-K 0.36
0.13

Otherwise Unclassified Properties

Density, g/cm3 0.92
1.3

Common Calculations

Stiffness to Weight: Axial, points 0.18
1.6
Stiffness to Weight: Bending, points 24
40
Strength to Weight: Axial, points 2.1
11
Strength to Weight: Bending, points 8.8
24
Thermal Diffusivity, mm2/s 0.17
0.058