Cellulose nanofilaments and method to produce same
US9856607B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2011 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Jun 1, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/298
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Cellulose nanofilaments from cellulose fibers, a method and a device to produce them are disclosed. The nanofilaments are fine filaments with widths in the sub-micron range and lengths up to a couple of millimeters. These nanofilaments are made from natural fibers from wood and other plants. The surface of the nanofilaments can be modified to carry anionic, cationic, polar, hydrophobic or other functional groups. Addition of these nanofilaments to papermaking furnishes substantially improves the wet-web strength and dry sheet strength much better than existing natural and synthetic polymers. The cellulose nanofilaments produced by the present invention are excellent additives for reinforcement of paper and paperboard products and composite materials, and can be used to produce superabsorbent materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.