High-density polyethylene (HDPE) or polyethylenehigh-density (PEHD) is a thermoplastic polymer produced from the monomer ethylene. … With a high strength-to-density ratio, HDPE is used in the production of plastic bottles, corrosion-resistantpiping, geomembranes and plastic lumber.Its primary use is in packaging (plastic bags, plastic films, geomembranes, containers including bottles, etc.).
LDPE and HDPE are commonly used in high voltage insulation systems. The Britishused it in World War II because polyethylene has very low-loss properties at very high frequency radio waves. Combined with it being thin and lightweight, this made it ideal for insulating communication cables.