Screw extruder

Details Screw extruder Screw extruder

B - Operations, Transporting

29

C

18/733

B29C 47/02 (2006.01) B29C 47/38 (2006.01) B29C 47/64 (2006.01)

Patent

CA 1161231

ABSTRACT OF THE DISCLOSURE An insulating coating of extruded polymer material is formed around a moving conductor wire; the extruder includes a decompression zone effective to arrest shear degradation of the polymer such that the melt index of the insulating polymer on the insulated wire is not more than 50% of the melt index of the solid, particulate polymer material before extrusion; the extruder includes valve means and intense mixing means which ensure that the polymer melts in a controlled manner whereby a uniform extrudate is formed.

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