Upm-Kymmene Corporation

Teknologian Tutkimuskeskus Vtt Oy

Upm-Kymmene Oyj Corporation

Monika Österberg

Janne Laine

Harri Kosonen

Leila Pohjola

Irmeli Sinisalo

Delphine Miquel

Markus Nuopponen

Jaakko Pere

Vesa Kunnari

Jan-Erik Teirfolk

Ramjee Subramanian

Jouni Paltakari

Tekla Tammelin

Jari Vartiainen

Tero Malm

Tuomas Hänninen

Maria Soledad Peresin

Leena-Sisko Johansson

Miquel Delphine

The present invention relates to a continuous roll-to-roll process for improving the water tolerance of bio-based polymers, in particular cellulose nanofibrils (CNF) films. Furthermore, the invention provides a method, which combines surface modification/functionalization for improving water stability and wet strength, UV/Ozone treatment, corona treatment or plasma activation for purifying and activating the surface and thus increasing the reaction efficiency, and further hydrophobization of the surface of CNF film.

Method for improving the water tolerance of bio-based CNF-films

The invention relates to pretreating of native cellulose pulp in the manufacture of nanofibrillated cellulose, and to a nanofibrillated cellulose product obtainable by the method.

Method for pretreating cellulose pulp

A method for preparing aqueous furnish to be used in paper or paper board manufacturing. Filler and/or fibers are treated with cationic polyelectrolyte and nanofibrillated cellulose. The strength of the paper and the retention of the fillers in paper can be improved. A furnish prepared by a method, and a paper or a paper board manufactured from the furnish.

Method for producing furnish, furnish and paper

A Method of pretreating native cellulose pulp in the manufacture of nanofibrillated cellulose, and a nanofibrillated cellulose product obtainable by the method.

The present invention provides a method for producing modified nanofibrillated cellulose characterized by bringing cellulosic material into a fiber suspension, adsorbing a cellulose derivative or polysaccharide or polysaccharide derivative onto fibers in said fiber suspension under special conditions and subjecting the obtained fiber suspension derivative to mechanical disintegration. A modified nanofibrillated cellulose obtainable by a method of the present invention is provided. Furthermore, the invention relates to the use of said modified nanofibrillated cellulose.

Method for producing modified cellulose

A method for preparing aqueous furnish to be used in paper or paper board manufacturing. Filler and/or fibers are treated with cationic polyelectrolyte and nanofibrillated cellulose. A furnish and a paper or a paper board.

Growing community of inventors

Espoo, Finland

Monika Österberg