Dielectric Constant
The dielectric constant of Teflon® PTFE resins shows
less change over a wide range of temperatures and
frequencies than any other solid material. This value
remains essentially constant at 2.1 over the entire
frequency spectrum.
Teflon® PTFE specimens have been heat-aged at 300°C
(572°F) for six months, and then cooled to room tem-
perature for measurement, with no change in dielectric
constant. Nonfluoropolymer insulating materials do not
show these properties.