Method of making paper with high filler content
US4824523A · kind A · utility
19Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1987 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Jun 1, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/29
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for producing paper by the addition of a retention - dry strength agent system. The system consists of PA1 cationic starch with a substitution degree of at least 0.005 in an amount of at least 1%, PA1 anionic high-polymer with a molecular weight greater than 10.sup.6 and in an amount of 0.003-0.5%, and PA1 cationic synthethic polymer in an amount of 0.005-0.5%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.