Patent ID: 8066207

Claim:
A method for processing, analyzing and characterizing each of a plurality of different batches of contaminated reclaimed mixed waste plastic for use in blending reformulated feed materials having at least one identified physical property falling within a predetermined acceptable range and from which useful products can subsequently be manufactured, the method comprising: preprocessing each of the plurality of different batches of contaminated, reclaimed mixed waste plastic by removing gross contaminants, shredding the resultant product, densifying the shredded mixed waste plastic to at least about 16 pounds per cubic foot, and pulverizing the densified mixed waste plastic to a predetermined maximum particle size of about −10 mesh; selecting a sample from each of the plurality of batches of preprocessed mixed waste plastic; further reducing the particle size of the sample to obtain a more uniform particle size distribution; injection molding each sample to produce a substantially homogeneous composition from the mixed waste plastics within that sample; and analyzing at least a portion of each substantially homogeneous injection molded sample to characterize and determine at least one physical property of that sample.