B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/761
B29C 29/00 (1980.01)
Patent
CA 1069268
ABSTRACT OF THE DISCLOSURE An apparatus for and method of employing a high per- centage of reground polyethylene resin scrap in an extruder, wherein fluffy, low-density, polyethylene scrap resin is preferably admixed with a granular high-density polyethylene virgin resin, and the admixture fed by gravity into a first feed inlet in a screw-type conveyor, and granular polyethylene virgin resin fed by gravity into a second feed inlet generally adjacent to and downstream of the first feed inlet of the extruder. The admixture fed to the first feed inlet is in- sufficient to fill the volume of the extruder tube, while the virgin resin automatically fed by gravity fills up the total volume in the extruder tube, thereby preventing starvation of the resin to the extruder die in the event of blockage of the fluffy scrap resin, which technique permits high amounts of from 20 to 40% of scrap resin to be blended with virgin resin.
244969
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