FEP Compression Molding

FEP (fluorinated ethylene propylene) is a copolymer of TFE (tetrafluoroethylene) and HFP (hexafluoropropylene).  Because FEP is fully fluorinated and the bonds between its carbon and fluorine atoms are so strong, it has excellent chemical, thermal and electrical stability.

FEP Properties

1. •Resistant to nearly all chemicals except for alkali metals, fluorine gas and some halogen complexes
   

2. •Very high stress crack resistance
   

3. •Low coefficient of friction
   

4. •Lowest critical surface energy of any plastic
   

5. •Excellent nonstick properties
   

6. •Non-wetting, hydrophobic, high contact angle with water, oleophobic
   

7. •Excellent insulator
   

8. •Low dielectric constant and dissipation and high dielectric strength over a wide range of frequencies and temperatures
   

9. •Retention of properties at temperatures as high as 204 °C (400 °F)
   

10. •Useful properties at temperatures as low as -270 °C (-454 °F)
    

11. •Outstanding low-temperature toughness
    

12. •UL 94 V-0 flame resistance
    

13. •Limiting Oxygen Index (LOI) greater than 95
    

14. •Lowest refractive index of any thermoplastic (about the same as water)
    

15. •Good transmittance of UV and visible rays
    

16. •Very low light reflection
    

17. •Good long-term weatherability with excellent resistance to sunlight and ozone
    

18. •May be used in food contact applications in compliance with FDA 21 CFR 177.1550
    

19. •Excellent toughness
    

20. •Relatively soft
    

21. •Generally low mechanical strength, lower tensile strength and creep and wear resistance than other high-end plastics
    

22. •Inferior to PTFE in some mechanical properties, such as cut-through and abrasion resistance
    

FEP Applications

When high stress-crack resistance is required, FEP is used to line vessels that contain highly corrosive chemicals.

Compression-molded FEP Parts

1. •Valves
   

2. •Fittings
   

3. •Linings
   

4. •Gaskets
   

5. •Pumps
   

6. •Scientific instruments
   

7. •Pipes
   

8. •Tubes
   

9. •Labware
   

FEP Compression Molding Resins

Teflon® FEP from DuPont™

1. •Teflon® FEP 100
   

2. •Teflon® FEP 106
   

3. •Teflon® FEP 9302
   

4. •Teflon® FEP CJ 95
   

5. •Teflon® FEP CJ 99
   

6. •Teflon® FEP 9494
   

7. •Teflon® FEP 9495
   

8. •Teflon® FEP 9475
   

9. •Teflon® FEP 9835
   

10. 
    

NEOFLON™ FEP from Daikin America

1. •NEOFLON™ NP-30 FEP
   

2. •NEOFLON™ NP-40 FEP
   

3. •NEOFLON™ NP-130 FEP