FEPFluorinated ethylene propylene
For insulation, film and tubing applications. Melt-processable copolymer with low dielectric loss and good clarity — the workhorse for thin-wall cable insulation, film and tubing.
FEP · film · schematic illustration
Applications, forms and properties.
Family-level orientation. Values for a specific grade are quoted only from that grade’s own data sheet.
- Typical applications
- High-speed cable and interconnect insulation
- Wire coating and jacketing
- Film for release, lining and lamination
- Tubing for chemical and electronics applications
- Confirmed supply forms
- Pellets (extrusion & molding grades)
- Film
- Tubing
- Why it is chosen
- Favorable dielectric behavior for signal applications
- Thermal stability in cable environments
- Melt-processable — suited to thin-wall extrusion
- Good chemical resistance and clarity
- Grades & documents
- 15 Teflon™ FEP grade references are listed below, with the producer’s published typical values. TDS, SDS and lot CoA are supplied with the material where the producer issues them. Request documentation
Grade references.
Chemours Teflon™ FEP is supplied as translucent pellets for melt extrusion, injection, transfer and compression molding. The grades differ mainly in melt flow: the high-MFR 9000/8000/6000 series for fine and thin-wall wire, the mid-range grades for general cable and tubing, and the low-MFR grades where stress-crack resistance leads. Foamable FFR grades are listed separately.
Extrusion and molding grades
| Grade | Form | MFR g/10 min | Character | Process | Typical use |
|---|---|---|---|---|---|
| Teflon™ FEP 9898 | Pellet | 30 | Excellent electricals and processability | Extrusion, injection | High-frequency signal transmission; micro-coaxial cable |
| Teflon™ FEP 9494X | Pellet | 30 | Very high melt flow | Extrusion, injection | Ultra-thin wire coating; molded parts |
| Teflon™ FEP 8787 | Pellet | 30 | Good processing and electrical properties | Extrusion | Thin wire coating; molded parts |
| Teflon™ FEP 6100 | Pellet | 30 | Good processability | Extrusion, injection | General industrial cable |
| Teflon™ FEP 5100-J | Pellet | 24 | Very high melt flow | Injection | Thin wire coating; molded parts |
| Teflon™ FEP 106X | Pellet | 22 | Melt flow, processability and crack resistance | Extrusion, injection | Thin-wall wire, jackets, small moldings |
| Teflon™ FEP CJ 99X | Pellet | 9 | Processability of 100 with the stress-crack resistance of 140 | Extrusion | Wire, tubing |
| Teflon™ FEP 100X | Pellet | 7 | General-purpose grade (not for chemical linings) | Extrusion, compression | Wire, tubing, film |
| Teflon™ FEP CJ 95X | Pellet | 5 | Environmental stress-crack resistance | Extrusion | Data and telecom cable jackets |
| Teflon™ FEP 9302X | Pellet | 3 | Very high stress-crack resistance | Extrusion, injection | Lined products; telecom cable jackets |
Teflon™ FFR foamable fluoroplastic resins
| Grade | MFR g/10 min | Continuous use °C | Character | Typical use |
|---|---|---|---|---|
| Teflon™ FFR 430 | 7 | 200 | Low MFR, good dielectrics, good adhesion | Large, thick-wall cable |
| Teflon™ FFR 550 | 14 | 200 | Good dielectrics and adhesion | HDMI cable |
| Teflon™ FFR 750 | 14 | 260 | High melt strength, higher temperature rating | RF / microwave low-loss cable |
| Teflon™ FFR 770 | 30 | 200 | Good flow, excellent dielectrics | Fine foamed coaxial cable; LAN cable |
| Teflon™ FFR 880 | 42 | 260 | Excellent flow, higher temperature rating | Fine foamed coaxial cable; LAN cable |
Nitrogen-injection physical foaming lowers dielectric constant and loss, cable capacitance, weight and size. Requires a foaming screw, nitrogen booster and nozzle designed for the cable.
- Teflon™ FEP film
- Transparent film for heat-sealing, lamination, release and metallisation; MIT flex life 10,000 cycles; dielectric constant 2.0.
- Teflon™ FEPD 121D dispersion
- 55 % solids aqueous dispersion for non-stick coatings.
Typical values as published by the producer for orientation; they are not a specification. Each grade is confirmed against its current TDS, with units and test conditions, before we quote. Chemours, Teflon™, Tefzel™, Zonyl™ and ECCtreme™ are trademarks of The Chemours Company.
What we confirm first.
The questions that decide whether a FEP grade fits your line. Having them ready shortens the first exchange.
Melt flow / grade family the line is tooled for
Solid or foamed insulation, and wall thickness targets
Electrical targets
Dielectric constant and dissipation factor at the operating frequency
Flame / smoke requirements tied to the cable standard
E.g. plenum ratings
Other fluoropolymer families.
Request FEP for your application.
Tell us the grade or the part, the form and dimensions, the volume and where it ships.