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Physical Data about the PEEK and Other Polymers that We Use

PTFE = Polytetrafluor ethylene
FEP = Fluorinated ethylene propylene
PFA = Perfluoralkoxy
ETFE = Ethylenetetra fluoroethylene
PVDF = Polyvinylidene fluoride
PEEK = Polyether ether ketone

Specification ASTM Method PTFE FEP PFA ETFE PVDF PEEK
Tensile Strength kp/cm2 D638 220 210 280 450 400 970 (ISO R257)
Elongation % D638 350 300 300 200 50 150 (ISO R257)
Flexural modulus kp/cm2 D790 6800 6800 6800 14000 17500 41.000 (ISO R178)
Hardness D785 D55 D55 D55 D75 D78 D126
Melting point °C   +327 +279 +305 +270 +180 +340
Max service temp °C   +260 +200 +260 +150 +130 +240
Low temp °C   -200 -200 -200 -200 -20 -100
Non flammability   Exc. Exc. Exc. Very good Very good Exc.
Water absorbtion 20°C, %   < 0.01 < 0.01 < 0.01 < 0.01 < 0.3 < 0.5
Weather resistance   Exc. Exc. Exc. Exc. Very good Exc.
Density g/cm3 D792 2.1 2.1 2.1 1.7 1.8 1.3 (ISO 250)
Dielectric constant 100 Hz, 1 kHz, 1 MHz D150 2.1 2.1 2.1 2.6 7.7 3.2 (50HZ – 100 MHz)
Dissipation factor (106Hz) D150 0.0002 0.0007 0.0002 0.005 0.018 0.003 (ISO 112)
Resistance against organic solvents   Exc. Exc. Exc. Very good Good Very good
Resistance against acids and alkalies   Exc. Exc. Exc. Very good Good Poor with acids
Good with alkalines
Flexibility   Good Good Good Good Fair Good
Radiation resistance, rad   105 106 106 108 108 109
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