UHMW PE 1000 sheet - thickness 250 mm. Weight: 0.94 g/cm³. Technical datasheet. PE 1000 / PE-UHMW sheets. OKAY Team. 26/07/2020. HDPE = mes for high-density polyethylene -this means long chains of ethylene monomers. UHMW = mes for ultra-high molecular weight polyethylene - REALLY long chains of ethylene monomers, and better wear properties.