Tefzel™ – Teflon™ ETFE
ETFE coatings are sold under both the Teflon™ and Tefzel™ names. ETFE is a copolymer of ethylene and tetrafluoroethylene fluoropolymer. Although not fully fluorinated, ETFE combines superior mechanical toughness with an outstanding chemical inertness that approaches that of Teflon™ fluoropolymer resins and can operate continuously at 149°C/300°F.
Tefzel™ and Teflon™ ETFE coatings are the toughest of the fluoroplastics (Hardness of 70 Shore D) and can be applied at film builds up to 1,000 micrometers (40 mils) to provide a highly durable finish. Tefzel™ and Teflon™ ETFE resins are excellent coating options if you’re looking for a cost-effective fluoropolymer that can protect your equipment and tanks from both acids and caustics. They protect against chemical corrosion caused by the full pH spectrum. Tefzel™ and Teflon™ ETFE coatings also offer increased permeation protection, the other major issue that fluoropolymers address.
Effects of Radiation on Tefzel™ and Teflon™ ETFE
Changes in physical properties by radiation include reduced elongation while tensile strength remains unchanged. Stiffness is increased and electrical losses are increased.
These changes are independent of whether radiation took place in air or nitrogen. In the case of flex life however, a difference exists in that radiation in nitrogen gives a greater flex life than an equal dose in air.
ETFE Coating Benefits
- Excellent chemical and heat resistance
- Good release properties
- First class cryogenic stability
- Low coefficient of friction (0.23 Coefficient of Friction)
- Excellent electrical insulating properties
- Few substances will adhere to ETFE– tacky substances that do are easily removed
- Both oleophobic and hydrophobic – not readily wetted
- High dielectric strength (2000 V/mil) and low dissipation factor
- Virtually unaffected by UV or weather
Tefzel™ – Teflon™ ETFE vs. Halar® ECTFE
ETFE is more thermally stable and more chemically resistant than ECTFE. See the following link for a more detailed explanation.
ETFE vs ECTFE
A detailed ETFE Chemical Use Temperature Guide can be found here:
EFTE Chemical Use Temperature Guide