DuPont Teflon® PTFE Grade 307A Aqueous Dispersion

Subcategory: Fluoropolymer; Thermoplastic; PTFE

Key Words: Polytetrafluoroethylene; DuPont Fluoroproducts

Material Notes:
Teflon® PTFE 307A fluoropolymer resin is a negatively charged, hydrophobic colloid containing approximately 60% (by total weight) of 0.05 to 0.5 mm polytetrafluoroethylene (PTFE) resin particles suspended in water. A milky white liquid, Teflon® PTFE 307A also contains approximately 6% (by weight of PTFE) of a nonionic wetting agent and stabilizer. Viscosity at room temperature is approximately 20 cP. Nominal pH is 10.

Teflon® PTFE 307A is similar to the generalpurpose Teflon® PTFE 30, except that it has a smaller particle size. This could offer advantages in impregnation and better shelf stability. A possible disadvantage is poorer shear stability.

When properly processed, the PTFE resin in Teflon® PTFE 307A exhibits the superior properties typical of the fluoropolymer resins: retention of properties after service at 260°C (500°F), useful properties at –240°C (–400°F), chemical inertness to nearly all industrial chemicals and solvents, and low friction and antistick surfaces. Dielectric properties are outstanding and stable with frequency and temperature.

Applications

Teflon® PTFE 307A is used to impregnate packings made from braided fibers for severe chemical and thermal service and as surface coatings for other substrates.