HDPE—Getting to Know a Durable Plastic Material

Plastics are one of the most important inventions of the past 200 years. They are easily adaptable, have many uses, and are often tough to break. One such class of plastics is the centerpiece of a high value market – HDPE, or high-density polyethylene.

HDPE is a highly durable plastic made from petroleum. It possesses a high strength to density ratio and the density ranges from 0.93 to 0.97 grams per cubic centimeter. Intense heat tolerances are a hallmark point of the material, as it can withstand a continuous burst of heat up to 110 degrees Celsius while the tipping point for a short exposure is 120 degrees.

Although the plastic’s density is only slightly higher than LDPE (low density polyethylene), HDPE has significantly stronger intermolecular and tensile strength than its low density counterpart. The chemical composition also allows for high impact resistance and durability against corrosive materials, which is why it is mostly used in industrial and water pipes.

That being said, HDPE also serves a multitude of different uses—some companies have fashioned myriad applications for them. These include lining for fireworks, storage sheds, outdoor home extensions and related furniture, electrical boxes, and wood substitutes for important projects such as marina docks. In some cases, HDPE can be machined for use as school lockers.