Method for manufacturing paper products comprising polymerized mineral networks
US6406594B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1998 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Jul 17, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/70
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Composite products having mineral networks polymerized about cellulosic material and a method for making such products are described. One embodiment of the composite product comprises a paper product having a polymerized mineral network, such as a silica/silicate network around, throughout and/or about the cellulosic material instead of having isolated particles of filler material deposited onto, or purposefully bonded to, the cellulosic material. One embodiment of the method comprises providing a mixture comprising cellulosic material, a Group I metal silicate and a Group II metal base or salt. The mixture is then carbonated to produce a product comprising precipitated carbonate filler material and a polymerized mineral network about the cellulosic material. This product is then formed into paper products wherein the ash content can be substantially greater than conventional paper products while maintaining suitable strength properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.