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:
Oct. 04, 2016
Filed:
Sep. 04, 2012
Sumanda Bandyopadhyay, Bangalore, IN;
Sadasivam Gopalakrishnan, Tamil Nadu, IN;
Sathish Ranganathan Kumar, Tamil Nadu, IN;
Kaushik Banik, Bangalore, IN;
Zahir Bashir, Riyadh, SA;
Sumanda Bandyopadhyay, Bangalore, IN;
Sadasivam Gopalakrishnan, Tamil Nadu, IN;
Sathish Ranganathan Kumar, Tamil Nadu, IN;
Kaushik Banik, Bangalore, IN;
Zahir Bashir, Riyadh, SA;
SAUDI BASIC INDUSTRIES CORPORATION, Riyadh, SA;
Abstract
In an embodiment, a method of processing a polymer comprises: mixing polymer and solid carbon dioxide; introducing the polymer and solid carbon dioxide mixture to a hopper of a vented extruder; plasticizing the mixture to form a polymer melt with dissolved carbon dioxide; venting carbon dioxide as a gas before the die exit; and extruding the polymer melt through a die. In an embodiment, a method of making an article comprises: introducing a polymer powder to an extruder; introducing solid carbon dioxide powder to the extruder at the hopper; plasticizing and extruding the polymer and solid carbon dioxide mixture; venting the solid carbon dioxide before the die exit; extruding the polymer melt through a die to form pellets; and injection molding the polymer pellets without solid carbon dioxide to form molded articles.