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LDPE vs. RTPU

Both LDPE and RTPU are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.3
4.0
Tensile Strength: Ultimate (UTS), MPa 7.0
75

Thermal Properties

Maximum Temperature: Autoignition, °C 380
270
Maximum Temperature: Decomposition, °C 400
320
Specific Heat Capacity, J/kg-K 2300
1760
Thermal Conductivity, W/m-K 0.36
0.6
Thermal Expansion, µm/m-K 220
100

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 2.3
3.6

Otherwise Unclassified Properties

Density, g/cm3 0.92
1.1

Common Calculations

Stiffness to Weight: Axial, points 0.18
2.1
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 2.1
20
Strength to Weight: Bending, points 8.8
38
Thermal Diffusivity, mm2/s 0.17
0.32
Thermal Shock Resistance, points 7.6
13