Method for increasing filler retention of cellulosic fiber sheets
US6514384B1 · kind B1 · utility
5Cited by
14References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1999 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Mar 19, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for increasing filler retention of cellulosic fiber sheets is disclosed. In the method, cellulosic fibers with increased anionic sites are treated with either positively charged filler particles and/or amphoteric filler particles or a cationic retention aid and negatively charged filler particles and/or amphoteric filler particles. Cellulosic fiber sheets with retained filler particles are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.