Tefzel® ETFE Fluoropolymer Resin
Tefzel® is a modified ETFE (ethylene-tetrafluoroethylene) fluoropolymer available as pellets or as powder for rotational molding. Tefzel® combines superior mechanical toughness with an outstanding chemical inertness that approaches that of Teflon® fluoropolymer resins. Tefzel® features easy processibility, a specific gravity of 1.7, and high-energy radiation resistance. Most grades are rated for continuous exposure at 150°C (302°F), based on the 20,000-hour criterion.
Tefzel® ETFE fluoropolymer resins are processed by conventional melt-extrusion techniques and by injection, compression, transfer, rotational, and blow molding processes. The relatively high flow rate of these resins provides higher rates with less draw-down, as compared to those required for Teflon® FEP and PFA. Reciprocating screw injection molding machines are preferred. Long extruder barrels, relative to diameter, should be used to provide residence time for melting these high-temperature resins.
Applications
- Wire and cable insulation and covers
- Coating of flaps and pumps, production of lab utensils
- Components of electromechanisms, product shaping and extruded tubes
Advantages
- Withstands physical abuse during and after installation
- Good high and low temperature properties
- High flex life
- Good outgassing characteristics
- Fair cold flow properties
Disadvantages
- Some ETFE insulations fail flammability in a 30% oxygen environment
- Insulation tends to soften at high temperature
- Degraded by gamma radiation above 106 RADS
Looking for the crosslinked version? See Crosslinked Tefzel® ETFE. Also: Tefzel Wire Amperage Chart · Shop Tefzel Wire