LD-PE

LD-PE means low-density polyethylene. It is widely used soft commodity plastic. It is clear that stiffness is not an objective that can be achieved using LD-PE. The properties of LDPE are utilised in freeze box lids, for example; the hardness or modulus of the material depends on the blend. At room temperature, the hardness of the grade used in the Plasticprop sample is Shore D 40.

Why choose it?

  • An inexpensive alternative to TPE (not in 2k products).
  • Good impact and chemical resistance
  • LD-PE restores its ductility even in low temperatures. Its Tg is on the level of -110°C

Why not choose it?

  • Poor thermal resistance
  • Soft, poor scratch resistance
  • Sensitive to UV-light
  • Poor bonding
  • Flammable

Typical applications:

  • Food container lids
  • Ventilation duct caps
  • Toys

By examining the Plasticprop sample made of LD-PE, you can draw for example the following conclusions:

  • LDPE is very fluid; the integral hinge works, but can be torn off quite easily. Otherwise the material is reasonably tough.
  • You can bend the sample even at sharp angles without leaving a permanent mark.
  • In a manner typical of polyolefins, the sample surfaces are waxy and slippery. This distinguishes it clearly from TPE grades of the same hardness category.
  • The shrinkages of HDPE and LDPE are in the same range.
  • The material hardness is not quite sufficient for replicating the glossy mould surface.

Questions, Comments, Feedback

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.