HDPE

HDPE (High Density Polyethylene) Bottles are typically made by a process known as extrusion blow molding. In this process a tube of HDPE is extruded and positioned inside of a mold. Air is blown into the tube to create the molded bottle. Other LD bottles such as those used for home laundry products or shampoo employ a wide variety of colors.

Bottles can be a single layer of HDPE, or can be made with multiple layers of HDPE to include postconsumer content in the middle layer of a bottle, for example. Bottles might contain a layer of polymer known as either EVOH or nylon to provide improved oxygen barrier to the contents of the bottle.


HDPE Chemical resistance
  • Excellent resistance (no attack) to dilute and concentrated acids, alcohols, bases and esters
  • Good resistance (minor attack) to aldehydes, ketones and vegetable oils
  • Limited resistance (moderate attack suitable for short-term use only) to aliphatic and aromatic hydrocarbons, mineral oils, and oxidizing agents
  • Poor resistance, and not recommended for use with halogenated hydrocarbons

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