Method of removing hydrophilic ink
US5415733A · kind A · utility
7Cited by
11References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | May 27, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The removal of inks, particularly hydrophilic flexographic inks, from a pulp fiber slurry is accomplished by use of a combination of (a) a non-ionic surfactant; (b) a fatty acid or salt thereof; and (c) a water-soluble cationic polymer having a molecular weight less than about 1,000,000 daltons, particularly a polymer derived from the reaction of epichlorohydrin and at least one diamine or the polymerization of aziridine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.