High molecular weight HDPE polymers are a special class of linear resins with molecular weights in the 200,000 to 500,000 range. To obtain processability along with end-use properties, control of the molecular weight distribution is critical. Some materials are produced with a "bimodal" molecular weight distribution to obtain the necessary balance.
Common Applications
HMW-HDPE is made into blown film for packaging, extruded into pressure pipe, and blow-molded into large shipping containers. Extruded sheet is used to form truck bed liners and pond liners.