Sulfopolyesters for paper strength and process
US8512519B2 · kind B2 · utility
44Cited by
410References
21Claims
0Family size
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Key dates
| Filing date | Apr 22, 2010 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Sep 19, 2030 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Sulfopolyester thermoplastic resins provide advantages in papermaking processes and in paper products including paperboard. Improvements in wet strength and dry strength of paper products are achieved by addition of sulfopolyester thermoplastic resins and cationic strength additives during the paper making process. The use of sulfopolyester thermoplastic resins in paper products also significantly enhances the repulpability of the paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.