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FEP vs. UF

FEP belongs to the thermoplastics classification, while UF belongs to the thermoset plastics. There are 15 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 FEP and the bottom bar is UF.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.43
9.0
Elongation at Break, % 300
1.0
Tensile Strength: Ultimate (UTS), MPa 20
30

Thermal Properties

Specific Heat Capacity, J/kg-K 1170
1200
Thermal Conductivity, W/m-K 0.22
0.4
Thermal Expansion, µm/m-K 95
55

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 22
35
Electrical Resistivity Order of Magnitude, 10x Ω-m 16
9.0

Otherwise Unclassified Properties

Density, g/cm3 2.1
1.5

Common Calculations

Stiffness to Weight: Axial, points 0.11
3.3
Stiffness to Weight: Bending, points 12
46
Strength to Weight: Axial, points 2.6
5.6
Strength to Weight: Bending, points 7.6
14
Thermal Diffusivity, mm2/s 0.088
0.22
Thermal Shock Resistance, points 35
4.3