Method of making paper or board products
US12203223B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2023 |
| Grant date | Jan 21, 2025 |
| Priority date | — |
| Expiry date | Jun 29, 2043 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention is directed to products, such as paper and paperboard products, comprising a substrate containing cellulose and top ply comprising microfibrillated cellulose and inorganic particulate, to methods of making such paper and paperboard products, and associated uses of such paper and paperboard products. The microfibrillated cellulose and inorganic particulate material are applied at the stage when the wet substrate is in the process of being formed on the wire of a papermaking machine, thereby avoiding the additional cost of more extensive equipment and machinery as well as in separate drying of a coating. The microfibrillated cellulose facilitates the application of inorganic particulate onto the surface of a wet paper or paperboard substrate when applied thusly, by trapping the inorganic particulate on the surface of the substrate and by giving the composite sufficient strength and a suitable pore structure to make it suitable for printing and other end-use demands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.