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:
Sep. 29, 2026
Filed:
Jun. 28, 2023
Stora Enso Oyj, Helsinki, FI;
Isto Heiskanen, Imatra, FI;
Jukka Kankkunen, Imatra, FI;
Jukka Lyyra, Jämsä, FI;
Harri Taipale, Vantaa, FI;
Stora Enso OYJ, Helsinki, FI;
Abstract
The present invention relates to a multi-ply liner for use in food or beverage packaging materials, said multi-ply liner comprising: a first ply, and a second ply, wherein said first ply comprises at least 70 wt % unbleached kraft pulp and less than 30 wt % neutral sulfite semi chemical (NSSC) pulp based on dry weight, wherein said second ply comprises at least 50 wt % NSSC pulp and less than 50 wt % unbleached kraft pulp based on dry weight, and wherein said NSSC pulp in the second ply is a washed NSSC pulp which has an ash content of less than 1.8 wt %, as determined according to standard ISO 1762:2019. The present invention further relates to a method for manufacturing said multi-ply liner.