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HIGH DENSITY POLYETHYLENE (HDPE)

Coming from a low pressure process based on special catalysts (Ti- or Cr-based), HDPE has a linear polymeric chain, combined with a higher density and melting point. To fit special applications, the molarmass distribution can be adjusted in a wide range by means of catalysts or polymerisation technology. New applications are opened for HDPE as well as other low pressure PEs by applying metallocene (single-site) catalysts, which allow the production of very narrow molar mass distributions and the better distribution of comonomers.

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LINEAR LOW DENSITY POLYETHYLENE (LLDPE)

Based on the same technology as HDPE, but the density is reduced through the incorporation of longer a-olefins as comonomers. With this, another way of adapting the products to the final applications turns up. Single-site catalysts allow an expansion of the application range, mainly by allowing higher comonomer contents and a more even distribution of these.

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LOW DENSITY POLYETHYLENE (LDPE)

A product from a high-pressure polymerisation process, LDPE is characterised by its highly branched chain structure. As a result of this, density and crystallinity are reduced while the processability in a variety of conversion technologies is greatly facilitated. The addition of special comonomers can further expand the property range of these grades.