Fep Coating

Everflon FEP Aqueous Dispersion
Everflon FEP D50 is an off-white aqueous fluorinated ethylene propylene (FEP) dispersion stabilized with a non-ionic surfactant.

It is a general-purpose dispersion that can be used to impart some the unique properties of FEP to end products that would be difficult to make using traditional melt extrusion processes. It can be used to coat or impregnate porous structures, or to make thin films. It can be coated and melt bonded to polytetrafluoroethylene (PTFE) resin or used as a hot melt adhesive.

The FEP resin in Everflon FEP D50 is a melt flowable thermoplastic, providing superior properties typical of fluoroplastic resins: retention of properties after service at 204 °C (400 °F) and useful properties at 240 °C (400 °F).

Everflon FEP D50 aqueous dispersion provides:
Inertness to nearly all industrial chemicals and solvents
Stability at high temperatures
Excellent dielectric properties
Excellent weatherability

Application
Heat-sealable top coatings for PTFE-coated fabrics for belting, circuit boards, architectural fabrics, and electrical insulation
Cast film for capacitor dielectrics or chemical barriers
Hot melt adhesive for PTFE, PFA, and FEP parts
Metal coatings

Processing
Conventional dip or flow techniques can be used for coating or impregnating high temperature fabrics, fibers, and other products with Everflon FEP D50.

A FEP resin coating on woven fabrics made of fiberglass, fiber, or other high-temperature resistant fibers, can be made by dip coating. Successive passes may be necessary to build the desired thickness to produce a smooth, crack-free coating. Each coating layer is usually dried to remove water (typically at 120 °C [250°F]), baked to remove the wetting agent (typically at 270 °C [518 °F]), and then heated above the crystalline melting point of the resin particles (approximately 265 °C [509 °F]). If the Everflon FEP D50 is being used as a top coat over a PTFE-coated fabric or other parts, the coating must be heated to melt the PTFE (approximately 337 °C [639 °F]) to maximize adhesion. Other solid or liquid ingredients can be added to Everflon FEP D50 to provide specific processing or finished product behavior