Teflon® FEP D 121

DuPont™ Teflon ® FEPD 121 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 FEPD 121 is a melt flowable thermoplastic, providing superior properties typical of fluoropolymer resins: retention of properties after service at 204 °C (400 °F) and useful properties at -240 °C (-400 °F).

FEPD 121 aqueous dispersion provides:

• inertness to nearly all industrial chemicals and solvents

• stability at high temperatures

• excellent dielectric properties

• excellent weatherability

Typical Applications

• 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