Process for papermaking
US4755259A · kind A · utility
14Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1986 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Dec 22, 2006 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In making paper from an aqueous paper making stock, a binder comprising colloidal silicic acid and guar gum is added to the stock for improving the paper or the retention of the stock components so that the pollution problems and the amount of valuable substances in the white water are reduced. The guar gum is amphoteric or preferably cationic and may form part of the binder complex in a mixture with cationic starch. The weight ratio of guar gum to SiO.sub.2 or of guar gum plus cationic starch to SiO.sub.2 is between 0.1:1 and 25:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.