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PAR vs. PFA

Both PAR and PFA are thermoplastics. There are 17 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 50
300
Flexural Modulus, GPa 2.1
0.7
Tensile Strength: Ultimate (UTS), MPa 67
30

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C 170
50
Heat Deflection Temperature At 455 kPa (66 psi), °C 180
75
Specific Heat Capacity, J/kg-K 1200
1000
Thermal Conductivity, W/m-K 0.18
0.25
Thermal Expansion, µm/m-K 88
120

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.0
2.1
Dielectric Strength (Breakdown Potential), kV/mm 16
22
Electrical Resistivity Order of Magnitude, 10x Ω-m 12
16

Otherwise Unclassified Properties

Density, g/cm3 1.2
2.2
Limiting Oxygen Index (LOI), % 35
80
Water Absorption After 24 Hours, % 0.26
0

Common Calculations

Strength to Weight: Axial, points 16
3.9
Strength to Weight: Bending, points 31
10
Thermal Diffusivity, mm2/s 0.13
0.12