Property
ASTM Standard
Unit
PTFE
FEP
PFA
Specific Gravity
D792
—
2.15
Tensile Strength
D638
psi
3000-5000
2800-5000
4000-4500
Elongation
%
300-500
250-330
280-400
Flexural Modulus
D790
MPa
496
586
(psi)
-72,000
-85,000
Folding Endurance
D2176
(MIT)
>106
5-80 x 103
10-500 x 103
cycles
Impact Strength
D256
J/m
189
No Break
(ft·lb/in)
-3.5
Hardness
D2240
Shore D pencil
50-65 HB
56
60
HB
Coefficient of Friction, Dynamic
D1894
0.05-0.10
0.08-0.3
Chemical/Solvent Resistance
D543
Excellent
Water Absorption 24h,%
D570
<0.01
<0.03
Deformation Under Load
*D621 100 ºC
5
2.4
**D621 25 ºC
7
3
2.7
Refractive Index
1.35
1.338
1.34
Arc Resistivity, % Sec
D 495
>300
>200
Limiting Oxygen Index, %
D2863
>95