Method of increasing filler content in papermaking
US8647472B2 · kind B2 · utility
7Cited by
13References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2010 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Sep 29, 2031 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/675
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a method of producing paper with a higher proportion of mineral filler particles than is otherwise be possible without the expected loss in paper strength by preflocculating the filler particles. The method allows for the use of the greater amount of filler particles by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a strength additive. The strength additive holds the paper fibers together tightly and is not wasted on the filler particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.