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:
Dec. 04, 2018
Filed:
Apr. 29, 2015
Applicant:
Stora Enso Oyj, Helsinki, FI;
Inventors:
Hallgren Hans, Bromma, SE;
Frank Peng, Hammarö, SE;
Anders Moberg, Hammaro, SE;
Hans Höglund, Matfors, SE;
Gunilla Pettersson, Sundsvall, SE;
Sven Norgren, Sundsvall, SE;
Assignee:
Stora Enso OYJ, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21F 3/02 (2006.01); D21H 11/08 (2006.01); D21H 11/10 (2006.01); D21H 17/26 (2006.01); D21H 17/29 (2006.01); D21H 21/18 (2006.01);
U.S. Cl.
CPC ...
D21H 21/18 (2013.01); D21F 3/0281 (2013.01); D21H 11/08 (2013.01); D21H 11/10 (2013.01); D21H 17/26 (2013.01); D21H 17/29 (2013.01);
Abstract
The present invention relates to a process for producing at least one ply of a paper or board product wherein a web comprising mechanical and/or chemimechanical pulp and at least one dry strength additive is dried in a press drying process by subjecting the web to heat and an overpressure of above 40 kPa. The present invention also relates to a paper product, a paperboard product and a ply produced according to the process.