公开(公告)号：EP1759058A1

公开(公告)日：2007-03-07

申请号：EP05752539.6

申请日：2005-06-16

Applicant: STFI-Packforsk AB

Inventor： GLAD-NORDMARK, Gunborg ,  LINDSTRÖM, Tom

IPC: D21H17/69 ,  D21H23/04 ,  D21H11/20

CPC classification number: D21H17/25 ,  D21H17/67 ,  D21H23/04

Abstract: The present invention provides, according to a first aspect a method for manufacturing paper or paperboard, wherein the a) the pulp is treated with CMC or a derivative thereof or an amphoteric CMC derivative, thereby forming a stock , b) filler/pigment is treated with a cationically active polymer with an addition of approximately from 0.015 % to 1.5 %, preferably from 0.03 % to 0.6 %, most preferred approximately 0.3 % ; and c) the thus treated filler/pigment is added to the stock, comprising at least 10 treated fibres (may be up to 100%) according to step a). The present invention also provides, according to a second aspect, paper or paperboard obtainable by the above method according to the first aspect. According to a third aspect of the invention, use of paper or paper board according to the second aspect of the invention for the manufacture of liquid board, communication paper, packaging paper, liner or board is provided.

公开(公告)号：EP1240389A1

公开(公告)日：2002-09-18

申请号：EP00966646.2

申请日：2000-09-20

Applicant: STFI

Inventor： LINDSTRÖM, Tom ,  GLAD-NORDMARK, Gunborg ,  RISINGER, Gunnel ,  LAINE, Janne

IPC: D21H11/20 ,  D21H17/25

CPC classification number: D21C9/005 ,  D21H11/20 ,  D21H21/20

Abstract: A method for modifying cellulose fibers; which are treated for at least 5 minutes with an aqueous solution of CMC or CMC-derivative containing electrolyte at a temperature of at least approximately 100 °C, and the pH during the treatment is approximately 1.5-4.5, or higher than 11; or the concentration of electrolyte is approximately 0.001 - 0.5 M, if the electrolyte has monovalent cations, or approximately 0.0002 - 0.5 M, if the electrolyte has divalent cations, and cellulose fibers that have been modified according to this method, and use of the modified cellulose fibers for the manufacture of rayon fibers. A method for the manufacture of paper with a high wet strength, whereby an aqueous suspension of cellulose fibers is produced, and the cellulose fibers are modified as described above, and wet-strength agent is added to the aqueous suspension; and paper with a high wet strength manufactured according to this method.