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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All information on Plasticprop.com is based on the best knowledge and understanding of experienced plastic product designers. Nevertheless, we may be wrong. Do not use this website as your primary or only source of information. Always check and test in practice. Kindly contribute, if you know better. We do not take any responsibility, financial or ethical, for the outcome of your product.