HDPE (High-Density Polyethylene) and UHMW (Ultra-High-Molecular-Weight Polyethylene) are part of the polyolefin family and their properties are the result of different molecular weights. HDPE is relatively soft and has a low friction coefficient which makes it ideal for bumpers, guide rails, chutes and other material conveyor applications. Food grade varieties are often used for cutting boards and other food processing applications. UHMW is more rigid and stands out with its self-lubricating properties and high wear resistance.