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:
Dec. 15, 1998
Filed:
Sep. 28, 1995
Patrick R Gruber, Blaine, MN (US);
Jeffrey John Kolstad, Wayzata, MN (US);
James Lunt, Minnetonka, MN (US);
Christopher M Ryan, Dayton, MN (US);
Ali Zakareya El-Afandi, Woodbury, MN (US);
James Nangeroni, Doylestown, PA (US);
Nancy Uzelac Buehler, Minneapolis, MN (US);
Mark Hartmann, Minnetonka, MN (US);
Jed Richard Randall, Minneapolis, MN (US);
Andrea Lee Brosch, Eden Prairie, MN (US);
Cargill, Incorporated, Minneapolis, MN (US);
Abstract
A compostable multilayer structure in the form of a film, sheet, laminate, and the like, which comprises a core layer having a first surface and a second surface, a first blocking reducing layer covering the first surface of the core layer, and a second blocking reducing layer covering the second surface of the core layer. The core layer contains a lactic acid residue-containing polymer and has a glass transition temperature (T.sub.g) below about 20.degree. C. The first and second blocking reducing layers include a polymer composition of a hydrolyzable polymer and have a T.sub.g above about 50.degree. C. The multilayer structure can be used for preparing bags and wrappers.