Teflon™  FFR 750 is a fluoroplastic resin compounded with  a foam nucleating package. This resin is supplied as white  pellets and is used in a nitrogen gas-injected foam extrusion  process to produce uniform foam cells in the dielectric  insulation. Foaming the fluoroplastic reduces its dielectric  constant, providing opportunities for miniaturization and  weight savings. Foamed insulation of Teflon™  FFR 750  produces cables for high frequency signal transmission with  minimal distortion. 

Teflon™  FFR 750 is ideal for producing coaxial cable cores  in a broad range of sizes. A typical coaxial cable core would  have conductor sizes of 30 AWG or greater, wall thickness of  0.010 in or greater, with void content from 20% to 60%. 

These voids are closed cell in nature and range from  0.0007 in (0.018 mm) to 0.005 in (0.127 mm) in diameter.  Achievable void content will vary based on wall thickness and  processing conditions.