Method of manufacturing paper or cardboard products
US4210490A · kind A · utility
73Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1978 |
| Grant date | Jul 1, 1980 |
| Priority date | — |
| Expiry date | Dec 19, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Paper or cardboard products are manufactured by mixing an aqueous solution or dispersion of a cationic starch with an aqueous suspension of a kaolinitic clay filler, and adding the resulting mixture to a stock of cellulosic fibres to form a furnish containing the kaolinitic clay filler, the cationic starch and the cellulosic fibres, which furnish is then formed into the desired paper or cardboard products, the amount of shear to which the mixture containing the clay filler and cationic starch is subjected being controlled to ensure that the furnish contains flocs of clay filler and cationic starch of a desired size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.