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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 10214316 B1

PDFFull Text
Date of Patent:
Feb. 26, 2019

Filed:

Oct. 23, 2013

Method for manufacturing biodegradable packaging material, biodegradable packaging material and packages and containers made thereof

Applicant:

Stora Enso Oyj, Helsinki, FI;

Inventors:

Kimmo Nevalainen, Kotka, FI;

Ville Ribu, Lappeenranta, FI;

Jurkka Kuusipalo, Tampere, FI;

Sami Kotkamo, Tampere, FI;

Assignee:

STORA ENSO OYJ, Helsinki, FI;

Attorney:

Patterson Thuente Pedersen, P.A.

Primary Examiner:

Lee E Sanderson

Int. Cl.
CPC ...
B65D 5/56 (2006.01); B05D 1/26 (2006.01); B05D 7/00 (2006.01); B32B 27/36 (2006.01); D21H 19/28 (2006.01); D21H 19/80 (2006.01); B29C 47/02 (2006.01); B29C 47/06 (2006.01); B29C 47/92 (2006.01); B32B 7/02 (2006.01); B32B 27/08 (2006.01); B32B 27/12 (2006.01); B32B 27/30 (2006.01); B29C 47/00 (2006.01); C08L 101/16 (2006.01);
U.S. Cl.
CPC ...
B65D 5/563 (2013.01); B05D 1/265 (2013.01); B05D 7/58 (2013.01); B29C 47/025 (2013.01); B29C 47/065 (2013.01); B29C 47/92 (2013.01); B32B 7/02 (2013.01); B32B 27/08 (2013.01); B32B 27/12 (2013.01); B32B 27/308 (2013.01); B32B 27/36 (2013.01); D21H 19/28 (2013.01); D21H 19/80 (2013.01); B29C 47/0004 (2013.01); B32B 2270/00 (2013.01); B32B 2307/7163 (2013.01); B32B 2307/726 (2013.01); B32B 2439/02 (2013.01); B32B 2439/70 (2013.01); C08L 101/16 (2013.01); Y10T 428/24942 (2015.01);
Abstract

A biodegradable packaging material, a method of manufacturing the same, as well as products made of the material wherein a multilayer coating coextruded onto a fibrous substrate the multilayer coating comprising innermost and outermost layers of a blend comprising 20-95 wt-% of a higher melt index polylactide and 5-80 wt-% of another biodegradable polymer such as polybutylene succinate, and a middle layer containing a lower melt index polylactide alone. The goal is to increase machine speed in coextrusion while maintaining good adhesiveness to the substrate and good heat-sealability of the coating. The products include disposable drinking cups and board trays, as well as sealed carton packages for solids and liquids.

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