PTFE Coatings Review
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 applications.
- 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)||3000-5000 psi|
|Elongation (ASTM D1457)||300-500%|
|Impact Strength (ASTM D256)||3.5 ft-LB/in|
|Hardness (ASTM D2240)||50-65 HB (shore D)|
|Abrasion Resistance (Tabor)||12 mg|
|Coefficient of Friction (ASTM D1894)||.12 -.15 static, .05 -.10 dynamic|
|Dielectric Strength (ASTM D149)||450 volts per mil|
|Use Temperature||600°F max|
|Thermal Conductivity||1.7 BTU-in/h-ft 2-°F|
|Chemical Resistance (ASTM D543)||Excellent|
|Salt Spray Resistance (ASTM B117)||Fair|
|Water Absorption (ASTM D570)||< .01%|
|Thickness||.001" - .003"|