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Polytetrafluoroethylene (PTFE)
Polytetrafluoroethylene (PTFE) known typically
as “Teflon” was the result of Plunkett’s
accidental polymerization of tetrafluoroethylene.
The discovery was kept under wraps and used by
our government during WWII in the Manhatten
Project. It wasn’t until 1946 that DuPont
commercialized the trade name Teflon to describe
PTFE and subsequently two other derivatives of
PTFE. (FEP and PFA)
Polytetrafluoroethylene: PTFE (Provide a link to
PTFE PDF)
Inert- Used to contain corrosive chemicals
Lowest coefficient of friction of any solid-
reduces wear and provides non-stick properties.
Dielectric strength- makes it a great insulator
for cables.
PTFE is a thermomset material that sinters at
623 degrees Farenheit.
PTFE is subject to cold flow, thus it conforms
well in valve seats and provides an excellent
gasket material. Unfortunately, too much
pressure may cause excessive cold flow. This is
typically controlled with fillers.
Is available as resin, coatings, skived sheet.
Low surface energy makes it ideal as a non stick
coating
When coated onto a fabric, one can achieve
unique properties that enhance breathability
(Like in Gore- tex) and weatherability (Many air
supported structures with fabric roofs are made
with coated fiberglass fabric.
It’s low friction properties make it great for
things like computer mice, armor piercing
bullets, linear bearings and gears.
Fluorinated Ethylene Propylene FEP
FEP is a copolymer of hexafluoropropylene and
tetrafluoroethylene. It is a high performance
thermoplastic material that is melt processable
by almost all processing techniques. As with
PTFE and PFA it exhibits excellent electrical,
thermal, and chemical properties, and can be
found in applications ranging from
Known for their excellent chemical resistance,
superior electrical properties and high service
temperatures of up to 200' C (400'F). In
addition, FEP provides outstanding low
temperature toughness and unique flame
resistance.
Typical Applications:
Typical applications of valve and pump linings,
pipe liners, release applications or similar
uses where resistance to chemicals at elevated
temperature is essential or where serviceability
at extremely low temperature is desired.
High
Performance Film Data Sheets
For more detailed information view the film vendor data sheets
below.
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