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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.:

US 11084261 B1

PDFFull Text
Date of Patent:
Aug. 10, 2021

Filed:

Mar. 20, 2017

Oxygen barrier film and laminate and methods of manufacturing the same

Applicant:

Stora Enso Oyj, Helsinki, FI;

Inventors:

Isto Heiskanen, Imatra, FI;

Esa Saukkonen, Lappeenranta, FI;

Ville Ribu, Lappeenranta, FI;

Assignee:

Stora Enso OYJ, Helsinki, FI;

Attorney:

Greer, Burns & Crain, Ltd.

Primary Examiner:

Sheeba Ahmed

Int. Cl.
CPC ...
B32B 29/00 (2006.01); B32B 27/32 (2006.01); B32B 27/08 (2006.01); B32B 5/02 (2006.01); B32B 7/12 (2006.01); B32B 29/08 (2006.01); B32B 27/12 (2006.01); B32B 27/34 (2006.01); B32B 27/10 (2006.01); B32B 37/15 (2006.01); D21H 11/18 (2006.01); D21H 21/16 (2006.01); C08J 5/18 (2006.01); B65D 65/40 (2006.01); B29C 48/21 (2019.01); B29C 48/22 (2019.01); B29C 48/08 (2019.01); B32B 27/30 (2006.01); B29C 48/00 (2019.01); B29C 48/154 (2019.01); B29K 23/00 (2006.01);
U.S. Cl.
CPC ...
B32B 27/322 (2013.01); B29C 48/0021 (2019.02); B29C 48/08 (2019.02); B29C 48/154 (2019.02); B29C 48/21 (2019.02); B32B 5/02 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/10 (2013.01); B32B 27/12 (2013.01); B32B 27/304 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B32B 29/00 (2013.01); B32B 29/002 (2013.01); B32B 29/08 (2013.01); D21H 11/18 (2013.01); D21H 21/16 (2013.01); B29K 2023/00 (2013.01); B29K 2023/06 (2013.01); B29K 2023/12 (2013.01); B29K 2995/0067 (2013.01); B32B 2250/04 (2013.01); B32B 2250/05 (2013.01); B32B 2262/065 (2013.01); B32B 2262/067 (2013.01); B32B 2307/31 (2013.01); B32B 2307/704 (2013.01); B32B 2307/718 (2013.01); B32B 2307/7244 (2013.01); B32B 2317/12 (2013.01); B32B 2317/18 (2013.01); B32B 2327/06 (2013.01); B32B 2329/04 (2013.01); B32B 2377/00 (2013.01); B32B 2439/62 (2013.01); B32B 2439/70 (2013.01); B32B 2553/00 (2013.01);
Abstract

The invention concerns a fibrous-based oxygen barrier film, which comprises (i) a microfibrillated cellulose (MFC) film, (ii) an oxygen barrier polymer layer, (iii) an optional tie layer, and (iv) an outermost polyolefin layer. The invention even concerns a laminate, in which said multilayer film is combined with a fibrous paper or board base by means of an intermediate polyethylene layer. The oxygen barrier polymerlayer, which preferably is EVOH, and the polyolefin layer are brought by coextrusion onto the MFC film. The film and the laminate according to the invention aim at an improved oxygen barrier in high humidity conditions and have use in oxygen-sensitive food packaging.

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