Filled paper and method of manufacturing the same
US8414739B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 16, 2006 |
| Grant date | Apr 9, 2013 |
| Priority date | — |
| Expiry date | Mar 16, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is provided a filled paper containing a coated filler obtained by coating a filler with a acrylamide copolymer (composite PAM) comprising (A) an anionic polysaccharide and (B) a cationic and/or an amphoteric acrylamide copolymer. The composite PAM is obtained, for example, by mixing the component (A) and the component (B). Since the filler is treated with a combination of the components (A) and (B) different from each other in charge properties and structure, suitable coagulation effect can be attained and the coated filler has excellent affinity for pulp slurry. Therefore, even in the case of a highly filled paper, a large paper strengthening effect can be attained by using a small amount of the chemical agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.