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UHMW (ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE)

Material: Available in: , , ,

Material Information

UHMW is a thermoplastic that belongs to the polyolefin group of material. Molecular density characterizes polyethylene, with UHMW being the most dense with a molecular weight of 3.1 million or higher. UHMW is simple to machine. UHMW is light weight, has no moisture absorption, has high tensile and impact strength, is shatter resistant, is long wearing, abrasion and corrosion resistant, is self-lubricating, and has excellent chemical resistance. This makes it ideal for wear parts in machinery and equipment as well as linings in material handling systems or storage containers. It also meets FDA and USDA acceptance for food and pharmaceutical equipment. UHMW has a melting point of 267º F but recommended maximum service is about 180º F. It is available in plate, rod, angle, strip with or without adhesive, and pipe.

Application

  • Conveyer wear strips
  • Snowmobile track sprockets
  • Guide rails – food processing
  • Bearings and washers
  • Textile loom parts
  • Chute linings
  • Agriculture
  • Medical devices
  • Printing
  • Automotive and railroad
  • Material handling

Properties

  • Outstanding abrasion/corrosion resistance
  • Extremely low coefficient of friction
  • High impact strength (no break)
  • Excellent chemical resistance
  • Light weight
  • Self-lubricating
  • No moisture absorption
  • Excellent noise abatement
  • Maintains key physical properties to -30ºF
  • Floats in water

Specifications

PhysicalAstm Test MethodUHMW
Density (lb/in^3)D7920.034
Specific GravityD7920.93
Water Absorption @ 24 hours (%)D5700
Mechanical
Tensile Strength (PSI)D6383,100
Tensile Modulus (PSI)D638125,000
Tensile Elongation at Yield (%)D638
Flexural Strength (PSI)D790
Flexural Modulus (PSI)D790125,000
Compressive StrengthD6952,000
Izod Impact (Notched), ft-lb/inD256No Break
Shore D HardnessD785D62-D66
Thermal
Coefficient of Thermal
Expansion, 10^-5/°F
D69611
Heat Deflection Temperature 264 psi, ºFD648203
Melting Point, °FD3418280
Continous Service Temp (Operating), °F180
Thermal Conductivity, BTU-in/hr-ft² °FC1772.92
Flammability RatingUL94HB
Electrical
Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
D149900
Arc Resistance (sec)D495250-350
Volume Resistivity (ohm-cm) @ 50% RHD25710^18
Dielectric Constant at 1 kHzD1502.30-2.35
Dissipation Factor at 1 kHzD1500.0002

Disclosure: 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. All values at 73°F (23°C) unless otherwise noted.

 

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