Method of removing hydrophilic ink
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United States of America Patent
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-
May 16, 1995
Grant Date -
N/A
app pub date -
May 27, 1993
filing date -
May 27, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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