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:
Aug. 03, 2021
Filed:
Mar. 21, 2017
Applicant:
Stora Enso Oyj, Helsinki, FI;
Inventors:
Assignee:
Stora Enso OYJ, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 29/08 (2006.01); D21H 27/10 (2006.01); D21H 27/38 (2006.01); D21H 27/40 (2006.01); D21H 11/18 (2006.01); D21H 17/25 (2006.01); D21H 21/16 (2006.01); D21H 21/18 (2006.01); D21H 17/16 (2006.01); D21H 17/17 (2006.01); D21H 17/62 (2006.01); B65D 65/40 (2006.01); B32B 29/00 (2006.01);
U.S. Cl.
CPC ...
B32B 29/08 (2013.01); B32B 29/005 (2013.01); B65D 65/403 (2013.01); D21H 11/18 (2013.01); D21H 17/16 (2013.01); D21H 17/17 (2013.01); D21H 17/25 (2013.01); D21H 17/62 (2013.01); D21H 21/16 (2013.01); D21H 21/18 (2013.01); D21H 27/10 (2013.01); D21H 27/38 (2013.01); D21H 27/40 (2013.01); B32B 2262/062 (2013.01); B32B 2262/14 (2013.01); B32B 2307/50 (2013.01); B32B 2307/54 (2013.01); B32B 2307/548 (2013.01); B32B 2307/718 (2013.01); B32B 2307/7246 (2013.01); B32B 2307/73 (2013.01); B32B 2307/732 (2013.01); B32B 2439/62 (2013.01);
Abstract
A corrugated fiberboard comprising cellulosic fibers, wherein said corrugated fiberboard has at least one of a geometrical tensile index in the range of from 32 to 65 Nm/g, a fracture toughness index in the range of from 4 to 24 Jm/kg, and a ring crush index in the range of from 5 to 10 Nm/g5 measured at relative humidity of 85% RH; wherein the cellulosic fibers comprises a mixture of less refined fibers having a Schopper-Riegler (SR) value in the range of 15 to 28 and microfibrillated cellulose fibers, wherein mixture comprises said microfibrillated cellulose in a range of from 1% to 5% by weight of the dry content of the cellulosic fibers.