Controllable filler prefloculation using a dual polymer system
US8172983B2 · kind B2 · utility
15Cited by
18References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2007 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Nov 27, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of high and low molecular weight flocculating agents to an aqueous dispersion of filler particles followed by shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.