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:
Nov. 10, 2015
Filed:
Mar. 11, 2011
Tapani Penttinen, Huutjärvi, FI;
Kimmo Nevalainen, Kotka, FI;
Jurkka Kuusipalo, Tampere, FI;
Tapio Koskinen, Siuro, FI;
Sami Kotkamo, Tampere, FI;
Tapani Penttinen, Huutjärvi, FI;
Kimmo Nevalainen, Kotka, FI;
Jurkka Kuusipalo, Tampere, FI;
Tapio Koskinen, Siuro, FI;
Sami Kotkamo, Tampere, FI;
Stora Enso OYJ, Helsinki, FI;
Abstract
A heat-sealable biodegradable packaging material, its manufacturing method and a product package formed thereof, where the packaging material comprises a fiber substrate, an inner polymeric coating layer against the fiber substrate, which contains polylactide and a biodegradable polyester that is blended therewith to improve the adhesion between the inner coating layer and the fiber substrate, and an outer coating layer that constitutes the outer surface of the material and contains polylactide and a biodegradable polyester that is blended therewith to improve the heat sealing ability of the layer, the portion of polylactide in the inner layer present in an amount greater than that in the outer layer. The inner and/or outer coating layers can further have blended therewith a small amount of acrylic copolymer that improves the adhesion and/or heat sealing ability. The coating layers can be introduced onto the fiber substrate by extrusion or coextrusion.