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PAR vs. EVA

Both PAR and EVA are thermoplastics. There are 14 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is PAR and the bottom bar is EVA.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.0
0.015 to 0.080
Elongation at Break, % 50
300 to 800
Tensile Strength: Ultimate (UTS), MPa 67
3.0 to 35

Thermal Properties

Maximum Temperature: Decomposition, °C 470
450
Specific Heat Capacity, J/kg-K 1200
1400
Thermal Conductivity, W/m-K 0.18
0.34

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.0
2.8
Dielectric Strength (Breakdown Potential), kV/mm 16
21

Otherwise Unclassified Properties

Density, g/cm3 1.2
0.93 to 1.0

Common Calculations

Stiffness to Weight: Axial, points 0.93
0.0087 to 0.048
Stiffness to Weight: Bending, points 35
8.6 to 15
Strength to Weight: Axial, points 16
0.87 to 10
Strength to Weight: Bending, points 31
4.8 to 26
Thermal Diffusivity, mm2/s 0.13
0.25 to 0.26