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This study examines the effect of porous media of different filtering rates placed at the entrance of an extrusion die, on the processability of polymer melts, both in the absence and presence of wall slip. Two fluids were considered: a polydimethylsiloxane (PDMS) oil and a high density polyethylene (HDPE) which can exhibit slip at the wall when extruded.The total pressure drop can be greatly increased...
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