Patent ID: 6262133
Filing Date: 2001-07-17
Classification: B29B,C08J,Y02P,Y02W

Abstract:
A process for removing deleterious surfaces from polymeric regrind particles comprising the steps of:treating polymeric regrind particles, the polymeric regrind particles composed of a solid substrate and a surface material deleterious to post-treatment processes attached to an outer surface of the substrate, the polymeric regrind material being treated in an attritive environment for an interval sufficient to accomplish substantial removal of said deleterious surface material from contact with polymeric regrind particulate substrate material with consequent removal of less than about 10% of total mass of polymeric regrind particulate substrate, wherein the attritive environment comprises an aqueous fluid medium which undergoes high shear agitation and is a medium for conveying mechanical agitative energy to the polymeric regrind particles introduced into the attritive environment, and wherein the polymeric regrind particles within the attritive environment are subjected to mechanical energy imparted by a mixing intensity greater than about 3 HP/1000 gallon;separating polymeric regrind particulate substrate from the attritive environment while retaining removed dissociated deleterious surface material within the attritive environment.