The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2018
Filed:
Feb. 02, 2015
Applicant:
Nova Chemicals (International) S.a., Fribourg, CH;
Inventor:
Tieqi Li, Calgary, CA;
Assignee:
NOVA Chemicals (International) S.A., Fribourg, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 47/60 (2006.01); B29C 47/40 (2006.01); B29C 47/00 (2006.01); B29C 47/64 (2006.01); B29B 7/40 (2006.01); B29K 23/00 (2006.01);
U.S. Cl.
CPC ...
B29C 47/402 (2013.01); B29B 7/40 (2013.01); B29C 47/0004 (2013.01); B29C 47/6087 (2013.01); B29C 47/64 (2013.01); B29K 2023/065 (2013.01);
Abstract
A method for the improved extrusion of polyethylene polymers comprising passing polyethylene through a single stage, twin screw extruder comprising a solid polymer conveying zone, a polymer melting zone, a dispersive mixing zone, and a distributive mixing/pumping zone, in which the throughput and screw speed are optimized to reduce the number of gels present, ensure complete polymer melting within the polymer melting zone, and to minimize polymer degradation.