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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 10632725 B1

PDFFull Text
Date of Patent:
Apr. 28, 2020

Filed:

Apr. 14, 2015

Method of producing a heat-resistant polymer-coated oven board, an oven board obtainable by the method, a food tray and a food package

Applicant:

Stora Enso Oyj, Helsinki, FI;

Inventors:

Kimmo Nevalainen, Kotka, FI;

Ville Ribu, Lappeenranta, FI;

Assignee:

Stora Enso OYJ, Helsinki, FI;

Attorney:

Greer, Burns & Crain Ltd.

Primary Examiner:

James D Sells

Int. Cl.
CPC ...
B32B 7/00 (2019.01); B32B 37/15 (2006.01); B32B 27/08 (2006.01); B32B 37/20 (2006.01); B65D 81/34 (2006.01); B32B 7/12 (2006.01); B32B 27/34 (2006.01); B32B 27/36 (2006.01); B32B 37/14 (2006.01); B29C 48/21 (2019.01); B29C 48/00 (2019.01); B29C 48/156 (2019.01); B32B 7/02 (2019.01); B32B 27/10 (2006.01); B29K 667/00 (2006.01); B29L 9/00 (2006.01); B29L 7/00 (2006.01); B29L 31/00 (2006.01); B29K 105/00 (2006.01); B29K 77/00 (2006.01); B29C 48/88 (2019.01);
U.S. Cl.
CPC ...
B32B 37/153 (2013.01); B29C 48/0021 (2019.02); B29C 48/156 (2019.02); B29C 48/21 (2019.02); B32B 7/02 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/10 (2013.01); B32B 27/34 (2013.01); B32B 27/36 (2013.01); B32B 37/14 (2013.01); B32B 37/203 (2013.01); B65D 81/343 (2013.01); B65D 81/3453 (2013.01); B29C 48/914 (2019.02); B29K 2077/00 (2013.01); B29K 2105/0097 (2013.01); B29K 2667/003 (2013.01); B29L 2007/008 (2013.01); B29L 2009/00 (2013.01); B29L 2009/005 (2013.01); B29L 2031/712 (2013.01); B32B 2270/00 (2013.01); B32B 2307/306 (2013.01); B32B 2307/718 (2013.01); B32B 2307/7242 (2013.01); B32B 2307/7244 (2013.01); B32B 2317/12 (2013.01); B32B 2367/00 (2013.01); B32B 2377/00 (2013.01); B32B 2439/70 (2013.01);
Abstract

The invention covers a method of producing a heat-resistant polymer-coated oven board, the resulting oven board, a food tray and a food package, which comprise such board and withstand heating in a range or microwave oven. According to the invention the coated oven board () is made by adhering a premade heat-resisting film () comprising polyethylene terephthalate (PET) or its derivate, such as glycol-modified PET known as PETG, to a board base () by extrusion lamination, in which an adhesive layer () comprising polyamide (PA) is extruded between the heat-resisting film and the board base. To improve the strength and barrier properties, the film () may be an extruded multilayer film and/or the film may be stretch-orientated to bring about crystallization in PET.

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