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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 12053964 B1

PDFFull Text
Date of Patent:
Aug. 06, 2024

Filed:

Jun. 25, 2019

Ply of a linerboard and a light weight linerboard for corrugated board

Applicant:

Stora Enso Oyj, Helsinki, FI;

Inventors:

Seppo Lampainen, Lahti, FI;

Frank Peng, Hammarö, SE;

Atso Laakso, Varkaus, FI;

Ari-Pekka Määttänen, Espoo, FI;

Assignee:

Stora Enso OYJ, Helsinki, FI;

Attorney:

Greer, Burns & Crain, Ltd.

Primary Examiner:

Catherine A Simone

Int. Cl.
CPC ...
B32B 29/00 (2006.01); B32B 7/12 (2006.01); B32B 29/08 (2006.01); B65D 65/40 (2006.01); D21H 11/02 (2006.01); D21H 11/10 (2006.01); D21H 11/18 (2006.01); D21H 17/00 (2006.01); D21H 17/28 (2006.01); D21H 17/45 (2006.01); D21H 17/68 (2006.01); D21H 21/18 (2006.01); D21H 27/10 (2006.01); D21H 27/40 (2006.01);
U.S. Cl.
CPC ...
B32B 29/005 (2013.01); B32B 7/12 (2013.01); B32B 29/08 (2013.01); B65D 65/403 (2013.01); D21H 11/02 (2013.01); D21H 11/10 (2013.01); D21H 11/18 (2013.01); D21H 17/28 (2013.01); D21H 17/45 (2013.01); D21H 17/68 (2013.01); D21H 17/74 (2013.01); D21H 21/18 (2013.01); D21H 27/10 (2013.01); D21H 27/40 (2013.01); B32B 2250/03 (2013.01); B32B 2250/26 (2013.01); B32B 2307/546 (2013.01); B32B 2307/718 (2013.01); B32B 2307/72 (2013.01); B32B 2553/00 (2013.01);
Abstract

The invention relates to a ply of a linerboard for corrugated board, which ply exhibits high strength properties and which enables the production of lightweight linerboards. The ply of the invention comprises 20-80 wt % CTMP from wood fibers and 80-20 wt % chemical pulp, calculated on the total fiber weight of said ply and strength additives chosen from the group of microfibrillated cellulose (MFC), anionic or cationic polymers and starch or combinations thereof. The ply exhibits a geometric SCT index of above 22 Nm/g and a density of below 680 kg/m, preferably of below 650 kg/m.

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