Paper products and pulps with surface enhanced pulp fibers and increased absorbency, and methods of making same
US11441271B2 · kind B2 · utility
1Cited by
46References
8Claims
0Family size
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Key dates
| Filing date | Feb 5, 2019 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Feb 5, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/007
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Paper products such as tissues can be made using a furnish comprising surface enhanced pulp fibers (“SEPF”). In some embodiments, SEPF have a weighted average fiber length of at least 0.3 millimeters (mm) and an average hydrodynamic specific surface area of at least 10 square meters per gram (m2/g). In some embodiments, a furnish or a paper product can comprise at least 2 % SEPF by dry weight. In some embodiments, a paper product comprising SEPF can be formed from a furnish having a freeness of 650 ml Canadian Standard Freeness (CSF) or less, optionally 600 ml CSF or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.