Very low density polyethylene (VLDPE) is a type of polyethylene having a density in the range of 0.890 - 0.914 g/cm3. Like LLDPE, it is
produced by low pressure polymerization techniques using metallocene catalysts.
This resin has a higher alpha-olefin content than the other types of polyethylene.
The flexible alkyl branches of the alpha-olefins lower the packing density and crystallinity which, in turn, results in high
(cold temperature) toughness and elasticity but very low tensile strength
and melting point.
Films made from VLDPE have excellent sealing and hot-tack
properties, as well as high transparency, puncture, impact and tear resistance which are typically better than those of low density polyethylene (LDPE).
Major applications of VLDPE include (multilayer) films for food packaging including ice bags, freezer films, as well as fill and seal packaging. VLDPEs is also used as a blending component to modify and improve the physical properties of other polyethylene resins such as flexibility and impact strength.
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