Key properties
FEP (fluorinated ethylene propylene)
• Lower melting temperature than PTFE
PTFE and FEP are similar in their material properties. The • More flexible than PTFE
main difference between PTFE and FEP lies in the maximum • Transparent/clear
• Low dielectric constant (insulating)
operating temperature and the colour. PTFE is milky/white • Chemically inert
and FEP is clear transparent. • Very low coefficient of friction
• No stick
• UV resistant (does not age)
• Not hygroscopic (water absorption <0.01%)
• FDA approval
• Working temperature from -200°C to +205°C
Possibilities
• FEP tubing
• FEP gas sampling bags
• FEP heat shrink tubing
• FEP bellows
• FEP welding liners
• FEP film/foil
• Coating with FEP
etc.
Technical information
FEP is typically used in applications where clarity is required (soil analysis/sight glasses, etc.).
Polyfluor Plastics bv Minervum 7006, NL-4817 ZL Breda T +31 (0)76 7920000 E info@polyfluor.nl
General properties FEP
Property Specification Unit Value
General Continuous working temp. Maximum °C 205
Chemical resistance - Excellent
Specific gravity D 792 g/cm³ 2.15
Electrical Dielectric constant D 150 at 103 Hz - 2
D 150 at 106 Hz - 2
Dielectric dissipation factor D 150 at 103 Hz - 0.0001
D 150 at 106 Hz - 0.0008
Dielectric strength D 149 kV/mm 50
Volume resistivity D 257 Ohm·cm >1018
Mechanical Tensile strength D 1708, D 638 Mpa 30
Elongation D 1708, D 638 % 300
Compressive strength D 695 Mpa 15
Impact strength D 256 bij +23°C J/m No break
Flexural Modulus D 790 bij +23°C Mpa 660
Tensile Modulus D 638 Mpa 350
Hardness D 2240 - 55-60
Thermal Melting (gel)point °C 270
Thermal conductivity +23°C W/Kg.m 0.25
HDT DIN 75 °C
method A 59
method B 57
Actual properties may change due to processing method, compound type, extruded dimensions and other
variables. It is the user's responsibility to evaluate and fully test the suitability of the product for their
specific application.
Polyfluor Plastics bv Minervum 7006, NL-4817 ZL Breda T +31 (0)76 7920000 E info@polyfluor.nl
