The look and feel of High-Density Polyethylene and PP are so similar that they may be difficult to tell apart.

Why choose?

  • Inexpensive. HD-PE is a commodity plastic.
  • Good ductility in subzero temperatures (HD-PE has a glass transition temperature of -120°C)
  • Good chemical resistance, better than that of PP (e.g. petrol canisters are made of HD-PE)
  • High impact resistance

Why not choose?

  • Despite being semi-crystalline, HD-PE has limited resistance against stress cracking.
  • PE is prone to hydrolysis while PP endures hot water better
  • Poor UV-resistance

Typical applications:

  • Bottle caps
  • Toys
  • Sleds
  • Bins (preferably indoor)

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