High- density polyethylene ( HDPE ) or polyethylene high -density (PEHD) is a thermoplastic polymer produced from the monomer ethylene. It is sometimes called "alkathene" or "polythene" when used for HDPE pipes. [1] . HDPE stands for High-Density Polyethylene . It is a versatile and durable plastic material commonly used in various industries and applications. HDPE is known for its high strength-to-density ratio, making it an ideal choice for piping systems, bottles, containers, and packaging materials. HDPE ... What does HDPE mean? H igh- D ensity P oly e thylene (HDPE) is a polyethylene thermoplastic made from petroleum. High density polyethylene (HDPE) is a thermoplastic polymer made from petroleum. It is known for its strength, high-impact resistance, and a wide variety of use cases. Learn more about HDPE and its benefits.