Polyethylene

 

LLDPE (Linear Low Density Polyethylene) — Flexible to medium stiffness, excellent impact, chemical, and environmental stress crack resistance, easy to process and most are available with UV stabilizer. Most will meet the requirements of FDA, USDA, NSF and UL (Horizontal Burn). Applications include tanks, containers, toys and playground equipment.

HDPE (High Density Polyethylene) — Stiffest of all polyethylene. Excellent chemical resistance and good impact. Easy to process and most available with a UV stabilizer. Most will meet the requirements of FDA, USDA, NSF and UL (Horizontal Burn). Applications include tanks, ducting and parts requiring maximum rigidity.

XLPE (Crosslink Polyethylene) — Contains a cross linking agent which reacts with the material during the molding cycle forming a crosslinked molecular structure similar to thermoset. Properly crosslinked resins provide excellent impact, environmental stress crack resistance and weatherability. Applications include gas and oil storage tanks, trash containers as well as parts requiring maximum toughness. Also good for parts being used in cold temperatures. Most do not meet FDA, USDA or NSF requirements.

Polyethylene can be modified to provide specific properties.