Fluorinated Ethylene Propylene (FEP) is a melt-processable copolymer of tetrafluoroethylene (PTFE) and hexafluoropropylene (HFP).
A variety of FEP materials with different melt viscosity are available by modifying the percentage of HFP. FEP offers the same excellent combination of properties characteristic of PTFE such as non-aging characteristics, chemical inertness, exceptional dielectric properties, low flammability, heat resistance, toughness and flexibility, low coefficient of friction, non-stick characteristics, and negligible moisture absorption.
However, FEP is softer than PTFE. FEP is highly transparent and has excellent weather resistance, especially to UV. PB21000 materials meet the requirements of ASTM D2116 Type III and Type IV, which are the grades with the lowest melt flow rates and most suitable for compression molding.
PBY Material Codes:
PB21000M - FEP Type III
PB21002F - FEP Type IV
FEP Spec. Summary
|Property||Test Method||Units||FEP TYPE III||FEP TYPE IV|
|Color||-||-||Translucent to White||Translucent to White|
|Specific Gravity||ASTM D792||-||2.120 - 2.170||2.120 - 2.170|
|Hardness Shore D||ASTM D2240||-||59 - 69||59 - 69|
|Tensile Strength, min.||ASTM D2116||PSI [MPa]||3,000 [20.7]||2,700[18.7]|
|Elongation at Break, min.||ASTM D2116||%||275||275|
|Service Temperature High||-||°F [°C]||392 ||392 |
|Service Temperature Low||-||°F [°C]||-436 [-260]||-436 [-260]|
|Second Melt Peak Temp.||ASTM D3418||°F [°C]||500 ||500 |
|Glass Transition Temp.||ASTM D3418||°F [°C]||176 ||176 |
Material Available In:
FEP Material Properties
Chemically inert to a wide range of industrial chemicals and solvents
Temperature range: -436°F to +392°F
Low coefficient of friction
Stress crack resistance
Good electrical properties
Outdoor weathering resistance
FEP Material Properties
Fluid Handling and chemical processing equipment
Pipe Linings and Pump Housings
Wet Bench Equipment
Packaging Equipment and Food Processing
PB21000M meets ASTM D2116 Type III requirements.
PB21002F meets ASTM D2116 Type IV requirements.
FEP Material Data Sheet Downloads
PB21000M - Material Data Sheet
PB21002F - Material Data Sheet
FEP Spec. Compliance
- Wypych, George. Handbook of Polymers. 2nd Ed., ChemTec/Publishing, 2016.
- Ebnesjjad, Sina. Fluoroplastics Vol1 & Vol2. 2nd Ed., Elsevier Inc., 2015.
- Aerospace Materials Specifications for PTFE materials (AMS3678)
- American Society for Testing and Materials (ASTM) Standards