PTFE

Polytetrafluoroethylene

PTFE – The original fluoropolymer. Accidentally discovered by Roy Plunkett in 1938 whilst working for a subsidiary of the DuPont organisation. Its properties of low friction and inertness have led to its use in such diverse environments as non-stick cookware, sealant tape, chemical linings, labware and inside the human body. It is not melt processable and cannot therefore be extruded by usual extrusion technology.

  • Unsurpassed Non Stick properties
  • Excellent chemical resistance
  • Operating temperature up to 250°C
  • Superb Electrical properties – low dielectric constant
  • Inert
  • Excellent weatherability

Trade Names for PTFE resins include DuPont Teflon™, Daikin Neoflon™, AGC Fluon™, 3M Dyneon™, Solvay Solexis Algoflon™

Property Value Units Method
Mechanical Properties
Tensile Strength, 23°C 2500
17
psi
MPa
Elongation, 23°C 200-500 %
Flexural Strength, 23°C No break at flexure D 790
Impact Strength, Izod 3.2
173
Ft-lbs/in
j/m
Yield Strength At 23°C 1450 psi
Density 2.17 gm/cu.cm
Thermal Properties
Melting Point 327 °C
Thermal Conductivity 1.7
0.25
Btu/hr-.ft-deg F
W/m/deg K
Service Temperature 260 °C
Processing Temperature 370-395 °C
Electrical Properties
Dielectric Strength, short time, 2mm 18 Volts/mum
Volume Resistivity, dry, @ 50% RH >1018 ohm-cm D 257
Dielectric Constant, 60 to 2 x 109 cps 2.1 ε D150-81
Other Properties
Flame Rating+ VE-0 UL-94
Resistance to Weathering Excellent
Specific Gravity 2.17 D792-66 (1979)
Coefficient of friction 0.27–0.67 D 1894

Case Study

Nestle Girvan

Engineers at Nestle's chocolate crumb processing facility in Girvan Scotland were constantly faced with a huge clean down bill as chocolate crumb...

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