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:
May. 22, 2012
Filed:
Sep. 26, 2008
Robert A. Green, Cary, NC (US);
Chad Henry Kamann, Carver, MN (US);
Jeffrey John Kolstad, Wayzata, MN (US);
Robert A. Green, Cary, NC (US);
Chad Henry Kamann, Carver, MN (US);
Jeffrey John Kolstad, Wayzata, MN (US);
NatureWorks LLC, Minnetonka, MN (US);
Abstract
PLA stereocomplex fibers are made by separately melting a high-D PLA starting resin and a high-L starting resin, mixing the melts and spinning the molten mixture. Subsequent heat treatment introduces high-melting 'stereocomplex' crystallinity into the fibers. The process can form fibers having a high content of 'stereocomplex' crystallites that have a high melting temperature. As a result, the fibers have excellent thermal resistance. The process is also easily adaptable to commercial melt spinning operations.