Ultra High Molecular Weight Polyethylene (UHMWPE) is a linear, low-pressure, Ziegler-type catalyst, polyethylene resin. Its weight-average molecular weight of 4 x 106 is approximately ten times that of high molecular weight high density polyethylene (HMW-HDPE) resins. The extremely high molecular weight of this resin, which is commercially available in grades ranging in molecular weight from 3.5 x 106 to 6 x 106g/mol (ASTM calculation), yields several unique properties. UHMWPE has both the highest sliding abrasion resistance and highest notched impact strength of any commercial plastic.

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