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. 29, 2020
Filed:
Nov. 30, 2015
Teknologian Tutkimuskeskus Vtt Oy, Espoo, FI;
Jari Vartiainen, Espoo, FI;
Tero Malm, Espoo, FI;
Vesa Kunnari, Espoo, FI;
Tuomas Hänninen, Espoo, FI;
Tekla Tammelin, Espoo, FI;
Maria Soledad Peresin, Espoo, FI;
Monika Österberg, Espoo, FI;
Leena-Sisko Johansson, Espoo, FI;
Teknologian tutkimuskeskus VTT Oy, Espoo, FI;
Abstract
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.