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. 05, 2017
Filed:
Nov. 12, 2013
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Assignee:
KEMIRA OYJ, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 21/18 (2006.01); D21H 17/37 (2006.01); D21H 17/29 (2006.01); D21H 23/04 (2006.01); D21H 27/30 (2006.01);
U.S. Cl.
CPC ...
D21H 21/18 (2013.01); D21H 17/29 (2013.01); D21H 17/375 (2013.01); D21H 23/04 (2013.01); D21H 27/30 (2013.01);
Abstract
The invention relates to a method for treating a fiber stock for making of paper, board or the like. The method comprises obtaining a fiber thick stock and adding to the fiber thick stock at least one cationic first agent, and adding separately to the fiber stock and after the addition of the cationic first agent, at least one anionic second agent, which is an water-soluble anionic copolymer of acrylamide, methacrylamide or acrylonitrile, in such amount that the ratio of the added absolute cationic charge to the added absolute anionic charge is from 1:0.1 to 1:0.95. The invention relates also to the product prepared by using a fiber stock, which is treated by using the method.