IDiyas

For the Inventor, By the Inventor

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 10414105 B1

PDFFull Text
Date of Patent:
Sep. 17, 2019

Filed:

Jan. 22, 2015

Method of use of polylactide and manufacturing a heat-sealed paper or board container or package

Applicant:

Stora Enso Oyj, Helsinki, FI;

Inventors:

Jari Räsänen, Imatra, FI;

Outi Kylliäinen, Imatra, FI;

Kimmo Nevalainen, Kotka, FI;

Ville Ribu, Lappeenranta, FI;

Ari Rosling, Turku, FI;

Mohammad Khajeheian, Turku, FI;

Ella Lindström, Turku, FI;

Assignee:

Stora Enso OYJ, Helsinki, FI;

Attorney:

Greer, Burns & Crain, Ltd.

Primary Examiner:

Daniel H Lee

Int. Cl.
CPC ...
B29C 65/00 (2006.01); B29C 71/04 (2006.01); B32B 27/10 (2006.01); B29C 35/08 (2006.01); B32B 27/20 (2006.01); B32B 27/36 (2006.01); D21H 25/06 (2006.01); D21H 27/10 (2006.01); D21H 19/28 (2006.01); D21H 19/62 (2006.01); B29C 65/02 (2006.01); B29C 35/10 (2006.01); B29K 67/00 (2006.01); B29L 31/00 (2006.01);
U.S. Cl.
CPC ...
B29C 66/73121 (2013.01); B29C 35/0805 (2013.01); B29C 35/0866 (2013.01); B29C 65/02 (2013.01); B29C 66/028 (2013.01); B29C 66/4322 (2013.01); B29C 66/71 (2013.01); B29C 66/72328 (2013.01); B29C 66/851 (2013.01); B29C 71/04 (2013.01); B32B 27/10 (2013.01); B32B 27/20 (2013.01); B32B 27/36 (2013.01); D21H 19/28 (2013.01); D21H 19/62 (2013.01); D21H 25/06 (2013.01); D21H 27/10 (2013.01); B29C 35/10 (2013.01); B29C 2035/0827 (2013.01); B29C 2035/0877 (2013.01); B29K 2067/00 (2013.01); B29K 2067/003 (2013.01); B29K 2067/046 (2013.01); B29L 2031/7132 (2013.01); B32B 2270/00 (2013.01); B32B 2307/31 (2013.01); B32B 2307/7163 (2013.01); B32B 2439/70 (2013.01);
Abstract

The invention relates to use of polylactide (PLA) as an extruded polymer coating on paper or board intended for the production of containers and packages, which are heated in a stove or microwave oven. According to the invention a polyfunctional cross-linking agent, such as trialkyl isocyanurate (TAIC), is blended with PLA, and the extruded coating layer is subjected to cross-linking electron beam (EB) radiation. PLA may be used as such or blended with another biodegradable polyester such as polybutylene succinate (PBS). EB radiation has been found to improve adhesion of the coating to the paper or board substrate, heat-scalability of the coating, and heat-resistance of the finished containers and packages.

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