Method of providing fiber web making furnish with filler, and paper or paper board
US9708772B2 · kind B2 · utility
1Cited by
2References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 25, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Apr 25, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/62
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method of producing precipitated calcium carbonate (PCC) where a retention/strength enhancing chemical is added to milk of lime to form a mixture thereof prior to adding the mixture of the retention/strength enhancing chemical and milk of lime to paper making stock in a pipeline leading to a headbox of a paper making machine, whereafter carbon dioxide is introduced to the paper making stock, and the carbonation reaction between milk of lime and carbon dioxide is allowed to proceed in the presence of both fibers and the retention/strength enhancing chemical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.