Paper products subjected to a surface treatment comprising enzyme-treated surface enhanced pulp fibers and methods of making the same

US11608596B2 · kind B2 · utility

Assignees

• Domtar Paper Company, LLC · US
• University of British Columbia · CA

Inventors

• Harshad Pande · Rue du Bois des Loges, CA
• Alexander Timothy Beam · Fort Mill, US
• Mark Martinez · Mill Valley, US
• Jingqian Chen · Vancouver, CA
• Miaoran Li · Vancouver, CA
• Heather Trajano · Vancouver, CA

Key dates

• Filing date: Mar 26, 2020
• Grant date: Mar 21, 2023
• Expiry date: Apr 15, 2041

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H21/16
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Methods of making a paper product can comprise forming a substrate from a first furnish that comprises a plurality of pulp fibers, at least partially dewatering the substrate, treating a second furnish that comprises a plurality of surface enhanced pulp fibers (SEPF) at least by adding one or more enzymes to the second furnish, and sizing the dewatered substrate at least by depositing the treated second furnish onto at least one of opposing first and second surfaces of the dewatered substrate. The SEPF can have a length weighted average fiber length that is greater than or equal to 0.20 millimeters (mm) and an average hydrodynamic specific surface area that is greater than or equal to 10 square meters per gram (m2/g).