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 20000-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

• Wires and cables insulation and cover
• Coating of flaps and pumps, production of  lab utensils
• Components of electromechanisms, products 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