Reconstituted polymeric materials derived from post-consumer...

Details Reconstituted polymeric materials derived from post-consumer... Reconstituted polymeric materials derived from post-consumer...

2005-02-01

2005-02-01

Lechert, Jr., Stephen J. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

With subsequent cutting, grooving, breaking, or comminuting

C264S122000, C264S123000, C241S023000, C241S065000, C241S260100

Reexamination Certificate

active

06849215

ABSTRACT:
A method of making polymeric particulates wherein polymeric scrap material, virgin polymeric material and mixtures thereof are supplied to intermeshing extruder screws which are rotated to transport the polymeric material along their length and subject the polymeric material to solid state shear pulverization and in-situ polymer compatibilization, if two or more incompatible polymers are present. Uniform pulverized particulates are produced without addition of a compatibilizing agent. The pulverized particulates are directly melt processable (as powder feedstock) and surprisingly yield a substantially homogeneous light color product.

REFERENCES:
patent: 6494390 (2002-12-01), Khait et al.

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