Friction
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Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding or grinding against each other. Types of friction include dry, fluid, lubricated, ski
Simulated blocks with fractal rough surfaces, exhibiting static frictional interactions
Polytetrafluoroethylene
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Polytetrafluoroethylene is a synthetic fluoropolymer of tetrafluoroethylene, and has numerous applications because it is heat resistant and chemically inert. The commonly known brand name of PTFE-base
Friction
…as teflon-on-teflon. Most dry materials in combination have friction coefficient values between 0.3 and 0.6. Values outside this range are rarer, but teflon, for example, can have a coefficient as low as 0.04. A value of zero would mean no friction at all, an elusive property. Rubber in contact with other…
Advertisement of the Happy Pan, a Teflon-coated pan from the 1960s
Advertisement for Zepel, the trade name used to market Teflon as a fabric treatment
PTFE thermal cover showing impact craters, from NASA's Ultra Heavy Cosmic Ray Experiment (UHCRE) on the Long Duration Exposure Facility (LDEF)
PTFE is often used to coat non-stick pans as it is hydrophobic and possesses fairly high heat resistance.