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Predicting layer rearrangement in extrusion

from SPE Plastics Research Online

Extrusion is the process of pushing material through a die of desired cross section to arrive at a final part profile. When viscoelastic materials, such as polystyrene, polycarbonate or low-density polyethylene, are extruded, velocity components develop that are perpendicular to the primary flow direction within noncircular geometries, such as the cross-sectional area of an extruder's flight screw path. more

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