Lumen-loaded paper pulp, its production and use
US4510020A · kind A · utility
81Cited by
0References
20Claims
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Assignee
Inventors
Key dates
| Filing date | Jun 12, 1980 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Jun 12, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Paper of improved properties is produced from pulp in which filler is selectively loaded within the fiber lumens by agitating a suspension of pulp and filler until the fiber lumens become loaded with filler, separating the residual suspended filler from the loaded fibers and vigorously washing the pulp until substantially all of the filler on the external surfaces of the fibers is removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.