Method of injection molding or extruding a polymer...

Details Method of injection molding or extruding a polymer... Method of injection molding or extruding a polymer...

2005-01-18

2009-02-24

Cooley, Charles E (Department: 1797)

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

C366S089000

Reexamination Certificate

active

07494264

ABSTRACT:
A method of injection molding or extruding a polymer composition having a predetermined bulk density associated with particles, granules or pellets of the polymer composition and a predetermined melt density when the polymer composition is fully melted and compressed. The method of the invention employs a screw having a volume compression ratio that is greater than or equal to the ratio of the predetermined melt density to the predetermined bulk density of the polymer composition and up to 1.25 × the ratio of the predetermined melt density to the predetermined bulk density of the polymer composition.

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