Preparation of filler compositions for paper
US4799964A · kind A · utility
22Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1987 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Apr 29, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/69
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for forming a preflocculated filler for use in making paper, which process comprises continuously bringing together an aqueous slurry of a paper filler material and a flocculating agent and imparting to the mixture for a period of not more than about 2 minutes and preferably for less than about 30 seconds, a shearing force sufficient to provide a flocculated filler of controlled particle size and most suitable for papermaking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.