Furnish pretreatment to improve paper strength aid performance in papermaking
US9506202B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2014 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Nov 10, 2034 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention is directed towards methods, compositions, and apparatus for increasing the strength of paper made out of a furnish having a large proportion of OCC. The method involves the following steps: 1) Providing a paper furnish having a large amount of OCC in it, 2) adding strength promoter to the furnish prior to adding a strength agent to the furnish, 3) adding a strength agent to the furnish, and 4) making a paper product from the furnish. This method allows cheap OCC material to be used in a papermaking process without the quality problems that the anionic trash in OCC typically causes. Thus paper products having low costs and high quality can be produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.