Coating Types and Design
Finishing and Plating Specifications
PTFE coatings are used throughout industry in military, space,
commercial and consumer applications. has the lowest coefficient of
friction of any solid material known. It is used as a non-stick coating for pans
and other cookware. PTFE is very unreactive, and so is often used in
containers and pipe work for reactive chemicals. Its melting point varies between
260 C (FEP) and 327 C (PTFE), depending on which specific PTFE resin has
been applied. Other applications include: electrical insulation, gaskets, and
sliding contact surfaces
Metals which can be readily PTFE coated are: Aluminum, Titanium,
Steel, Stainless Steel, Monel, Inconel, and Brass.
Plastics, Rubber, Glass, and other materials may also be
coated with PTFE ®.
PTFE coatings also has excellent low coefficient of
friction properties. Few substances will adhere to coatings.
Some PTFE coated surfaces will withstand extreme cold
temperatures without loss of performance properties and characteristics.
PTFE has excellent electrical properties especially at
radio frequencies, making it eminently suitable for use as an insulator in
cables and connector assemblies. Combined with its high melting temperature
this makes it the material of choice as a high performance substitute for
the weaker and more meltable polythene that is commonly used in low-cost
Amongst many other industrial applications, PTFE is used
to coat certain types of hardened, armour-piercing bullets, so as to reduce
the amount of wear on the firearm's rifling. These are often mistakenly
referred to as "cop-killer" bullets on account of 's
supposed ability to ease a bullet's passage through bullet-proof armour. Any
armour-piercing effect is, however, purely a function of the bullet's
velocity and rigidity rather than a property of PTFE ®.
PTFE is a polymer compound discovered by Roy J.
Plunkett (1910-1994) of DuPont
in 1938 and introduced as a commercial product in 1946. is polytetrafluoroethylene
(PTFE). is also used as the trade name for a polymer with similar
properties, perfluoroalkoxy polymer resin (PFA).
Typical PTFE Coatings Characteristics
|Tensile Strength (ASTM D1708)
|Elongation (ASTM D1457)
|Impact Strength (ASTM D256)
|Hardness (ASTM D2240)
||50-65 HB (shore D)
|Abrasion Resistance (Tabor)
|Coefficient of Friction (ASTM D1894)
||.12 -.15 static, .05 -.10 dynamic
|Dielectric Strength (ASTM D149)
||450 volts per mil
||1.7 BTU-in/h-ft 2-°F
|Chemical Resistance (ASTM D543)
|Salt Spray Resistance (ASTM B117)
|Water Absorption (ASTM D570)
||.001" - .003"