Patent ID: 9550338
Date: 2017-01-24
CPC Classifications: B01D,B07C,B29B,B29C,B29D,B29K,C08J,D01D,D01F,D10B,H05K,Y02P,Y02W

Claim:
1. A multi-screw extruder for use in extruding a polymer melt, said extruder comprising: a first satellite screw extruder, said first satellite screw extruder comprising a first satellite screw that is mounted to rotate about a central axis of said first satellite screw; a second satellite screw extruder, said second satellite screw extruder comprising a second satellite screw that is mounted to rotate about a central axis of said second satellite screw; a pressure regulation system that is adapted to maintain a pressure within said first and second satellite screw extruders below a pressure of about 1.5 millibars as said polymer melt passes through said first and second screw extruders; and a controller that operates said pressure regulation system to maintain said pressure within said first and second satellite screw extruders below said pressure of about 1.5 millibars while said multi-screw extruder is extruding said polymer melt.