MakeItFrom.com
Menu (ESC)

PBT vs. FEP

Both PBT and FEP 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 PBT and the bottom bar is FEP.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.7 to 8.7
0.43
Elongation at Break, % 2.5 to 43
300
Flexural Modulus, GPa 2.6 to 9.1
0.6
Flexural Strength, MPa 79 to 210
24
Tensile Strength: Ultimate (UTS), MPa 58 to 140
20

Thermal Properties

Glass Transition Temperature, °C 40
60
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 4.0
50
Heat Deflection Temperature At 455 kPa (66 psi), °C 160
70
Maximum Temperature: Autoignition, °C 380
630
Melting Onset (Solidus), °C 230
260
Specific Heat Capacity, J/kg-K 1040 to 1200
1170

Otherwise Unclassified Properties

Density, g/cm3 1.3 to 1.5
2.1
Limiting Oxygen Index (LOI), % 20
80

Common Calculations

Stiffness to Weight: Axial, points 1.1 to 3.2
0.11
Stiffness to Weight: Bending, points 35 to 45
12
Strength to Weight: Axial, points 12 to 25
2.6
Strength to Weight: Bending, points 25 to 38
7.6