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UPVC vs. FEP

Both uPVC and FEP are thermoplastics. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is uPVC and the bottom bar is FEP.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 3.7
0.43
Elongation at Break, % 58
300
Flexural Modulus, GPa 3.5
0.6
Flexural Strength, MPa 80
24
Tensile Strength: Ultimate (UTS), MPa 47
20

Thermal Properties

Glass Transition Temperature, °C 85
60
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 69
50
Heat Deflection Temperature At 455 kPa (66 psi), °C 90
70
Maximum Temperature: Autoignition, °C 400
630
Maximum Temperature: Mechanical, °C 95
200
Melting Onset (Solidus), °C 180
260
Specific Heat Capacity, J/kg-K 880
1170
Thermal Conductivity, W/m-K 0.16
0.22
Thermal Expansion, µm/m-K 61
95

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.4
1.9
Dielectric Strength (Breakdown Potential), kV/mm 19
22
Electrical Dissipation At 1 Hz 0.013
0.00026
Electrical Resistivity Order of Magnitude, 10x Ω-m 15
16

Otherwise Unclassified Properties

Density, g/cm3 1.4
2.1
Limiting Oxygen Index (LOI), % 42
80
Water Absorption After 24 Hours, % 0.24
0.010

Common Calculations

Stiffness to Weight: Axial, points 1.5
0.11
Stiffness to Weight: Bending, points 37
12
Strength to Weight: Axial, points 9.1
2.6
Strength to Weight: Bending, points 20
7.6
Thermal Diffusivity, mm2/s 0.13
0.088
Thermal Shock Resistance, points 15
35