Ultra High Molecular Weight Polyethylene (UHMWPE)

Alternative and trade names
GUR®, Utec®
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Description

It is an Ultra-High Molecular Weight Polyethylene (UHMWPE) which the molecular weight is about 10 times greater than High Density Polyethylene (HDPE) resins and its density makes finished parts approximately eight times lighter than steel. This extremely high molecular weight provides several outstanding properties, such as:


  • High abrasion wear resistance
  • High impact resistance
  • Very low coefficient of friction that makes the material self-lubricating
  • Properties

    General

    Density ρ

    0.93 - 0.94 g/cm³ at 20 °C

    Mechanical

    Elastic modulus E

    0.7 - 0.8 GPa at 20 °C

    Elongation A

    300 - 350 % at 20 °C

    Impact strength, Charpy unnotched Iunnot

    no break

    Max allowed stress σmax

    17 - 22 MPa at 20 °C

    at 15-20% strain

    Thermal

    Coefficient of thermal expansion α

    1.5E-4 - 2E-4 1/K at 20 °C

    Flammability

    UL 94 HB

    Max service temperature, long Tmaxlong

    80 - 90 °C

    Max service temperature, short Tmaxshort

    100 - 120 °C

    Melting point Tm

    130 - 135 °C

    Specific heat capacity cp

    2000 J/(kg·K) at 20 °C

    Thermal conductivity λ

    0.4 W/(m·K) at 20 °C

    Electrical

    Dielectric constant εr

    2 - 3 [-] at 20 °C

    Electrical resistivity ρel

    1.00E+12 - 1.00E+15 Ω·m at 20 °C

    Optical

    Transparency

    no

    Technological properties

    Application areas

    Surgical implants, protheses, screw conveyors, pulleys, gears, bushings, rolls

    Processing methods

    Extrusion

    This material data has been provided by M-Base.

    All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
    Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.