PTFE (Teflon ®)

Typical Properties of PTFE

Property

Test Method

PTFE (unfilled)

PTFE (25% glass filled)

Mechanical Properties

Density (lb/in³) ASTM D792 0.078 0.081
Tensile Strength (p.s.i.) ASTM D638 3,900 2,100
Tensile Modulus (p.s.i.) ASTM D638 80,000
Tensile Elongation at Break (%) ASTM D638 300 270
Flexural Strength (p.s.i.) ASTM D790 No Break 1950
Flexural Modulus (p.s.i.) ASTM D790 72,000 190,000
Izod Impact  (ft-lbs/in2) ASTM D256 3.5
Compressive Strength (p.s.i.) ASTM D695 3,500 1,000
Compressive Modulus (p.s.i.) ASTM D695 70,000 110,000
Hardness (Shore D) ASTM D785 D50 D60

Thermal Properties

Heat Deflection at 264 psi (°F) ASTM D648 132 150
Melting Temperature (°F) ASTM D3418 635 635
Max Operating Temperature (°F) 500 500
Coefficient of Linear Thermal Expansion (in/in/°F) ASTM D696 0.000075 0.000064
Thermal Conductivity (BTU-in/ft²-hr-°F) ASTM C177 1.70 3.1
Flammability Rating UL94 V-0 V-0

Electrical Properties

Dielectric Constant at 1 MHz ASTM D150 2.1 2.4
DissipationFactor at 1 MHz ASTM D150 < 0.0002 0.05
Volume Resistivity (Ohm-cm) at 50% RH ASTM D257 >1018 >1015

Water Absorption Rates

Water Absorption -24 hrs. (%) ASTM D570 <0.01 0.02

 

NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets.