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Ultra High Molecular Weight Polyethylene

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Ultra High Molecular Weight Polyethylene (UHMW PE)


Polymer Type

Thermoplastic

Description of Ultra High Molecular Weight Polyethylene (UHMW PE)

Light weight (1/8 the weight of mild steel), high in tensile strength, and as simple to machine as wood, UHMW PE is the ideal material for many wear parts in machinery and equipment as well as a superb lining in material handling systems and storage containers. UHMW PE is self-lubricating, shatter resistant, long-wearing, abrasion and corrosion resistant. It meets FDA and USDA acceptance for food and pharmaceutical equipment and is a good performer in applications up to 180 °F (82 °C) or when periodically cleaned with live steam or boiling water to sterilize.

TYPICAL PROPERTIES of POLYETHYLENE

ASTM or UL test Property     UHMW
PHYSICAL
D792 Density (lb/in³)
(g/cm³)
    0.034
0.93
D570 Water Absorption, 24 hrs (%)     0
MECHANICAL
D638 Tensile Strength (psi)     3,100
D638 Tensile Modulus (psi)     125,000
D638 Tensile Elongation at Yield (%)     -
D790 Flexural Strength (psi)     -
D790 Flexural Modulus (psi)     125,000
D695 Compressive Strength (psi)     2,000
D695 Compressive Modulus (psi)     -
D785 Hardness, Shore D     D62-D66
D256 IZOD Notched Impact (ft-lb/in)     No Break
THERMAL
D696 Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
    11
D648 Heat Deflection Temp (°F / °C)
at 66 psi
at 264 psi
   
203 / 95
180 / 82
D3418
Approx. Melting Temperature (°F / °C)     280 / 138
-
Max Operating Temp (°F / °C)     180 / 82
C177 Thermal Conductivity
(BTU-in/ft²-hr-°F)
(x 10-4 cal/cm-sec-°C)
   
2.92
10.06
UL94 Flammability Rating     H-B
ELECTRICAL
D149 Dielectric Strength (V/mil) short time, 1/8" thick     900
D150 Dielectric Constant at 1 kHz     2.30-2.35
D150 Dissipation Factor at 1 kHz     0.0002
D257 Volume Resistivity (ohm-cm) at 50% RH     1018
D495 Arc Resistance (sec)     250-350
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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