METHOD FOR OPTIMIZING ENERGY CONSUMPTION IN AN EXTRUSION PROCESS

摘要

The present invention relates to a method for preparing and extruding a bimodal polyethylene product, which comprises a first polyethylene fraction and a second polyethylene fraction having a different molecular weight than the first polyethylene fraction. More specifically, the present invention relates to a method for controlling the specific energy applied on said bimodal polyethylene product by regulating the amount of the polyethylene fraction having the higher molecular weight in said bimodal polyethylene product. According to the present invention regulation of the amount of said polyethylene fraction having the higher molecular weight in said bimodal polyethylene product is obtained by regulating the polymerization conditions for preparing the bimodal polyethylene product, and in particular by adjusting ethylene monomer feed during the polymerization process.