Method for increasing filler retention of cellulosic fiber sheets
US6824649B2 · kind B2 · utility
12Cited by
14References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2003 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Sep 4, 2023 |
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.