Chemours (formerly 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).
• Inertness to nearly all industrial chemicals and solvents
• Stability at high temperatures
• Excellent dielectric properties
• Excellent weatherability
• 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
• Holt melt adhesive for PTFE, PFA and FEP parts
• Metal coatings
Please note that dispersions contain solvents that may compromise the seals of the bottles if the solvents are left in direct contact with the lids for long periods of time. We recommend always storing the bottles in an upright orientation as soon as the shipment is received to lessen the likelihood of inadvertent leakage.
Please contact us at sales@fuelcellstore.com for the technical data sheets (TDS).
Teflon Properties | |
Solids Content (% FEP by weight) | 55% |
% Surfactant based on FEP solids | 5.5% |
Density of Dispersion (at 55% solids) | 1.41 g/cm³ |
Dispersion Particle Size, average diameter | 0.18 um (microns) |
pH of Dispersion | 10 |
Brookfield Viscosity (at 25°C) | 25 mPa·s |
Melting Temperature | 260°C (500°F) |
Melt Flow Rate (MFR 372/5.0) | 8 g/10 min |