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. 26, 2023
Filed:
Nov. 14, 2019
Applicant:
Stora Enso Oyj, Helsinki, FI;
Inventor:
Isabel Knöös, Säffle, SE;
Assignee:
Stora Enso OYJ, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 11/20 (2006.01); C08J 7/043 (2020.01); C08J 7/048 (2020.01); D21H 17/36 (2006.01); D21H 19/56 (2006.01); D21H 21/14 (2006.01); D21H 27/36 (2006.01); D21H 27/16 (2006.01); D21H 27/18 (2006.01);
U.S. Cl.
CPC ...
D21H 11/20 (2013.01); C08J 7/043 (2020.01); C08J 7/048 (2020.01); D21H 17/36 (2013.01); D21H 19/56 (2013.01); D21H 21/14 (2013.01); D21H 27/16 (2013.01); D21H 27/18 (2013.01); D21H 27/36 (2013.01); C08J 2301/10 (2013.01); C08J 2423/06 (2013.01);
Abstract
The present invention relates to a gas barrier film for a paper or paperboard based packaging material, said gas barrier film comprising: a microfibrillated cellulose layer (MFC layer), at least one surface of which has been grafted with a fatty acid halide; and a polymer layer disposed on the at least one surface of the MFC layer which has been grafted with a fatty acid halide. The present invention further relates to a paper or paperboard based packaging material, containers and carton blanks comprising the gas barrier film, and to a method for manufacturing the gas barrier film.