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 (HDPE) resins.  UHMWPE has both he highest abrasion resistance and highest impact strength of any plastic.  In fact, a 25mm (1") thick slap can stop a 0.38 caliber pistol slug at 150 mm (6").  Combined with abrasion resistance and toughness, the low coefficient of friction of UHMWPE yields a self-lubricating, non-stick surface.  Static and dynamic coefficients are significantly lower than steel and most plastic materials.  Typical Values 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 (HDPE) resins.  UHMWPE has both he highest abrasion resistance and highest impact strength of any plastic.  In fact, a 25mm (1") thick slap can stop a 0.38 caliber pistol slug at 150 mm (6").  Combined with abrasion resistance and toughness, the low coefficient of friction of UHMWPE yields a self-lubricating, non-stick surface.  Static and dynamic coefficients are significantly lower than steel and most plastic materials.