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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.
 
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