Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1997-11-24
2000-03-07
Fortuna, Jose
Paper making and fiber liberation
Processes and products
Non-fiber additive
1621641, 1621646, 1621683, 162169, 162158, 1621811, 1621817, 1621818, 162183, D21H 1748, D21H 2110
Patent
active
060335246
ABSTRACT:
A method for increasing retention and drainage of filling components in a paper making furnish in a paper making process comprising the steps of: making a slurry of filling components, treating the slurry with from about 0.003% to about 2.0% by weight based on total solids of a phenolic enhancer to form a pretreated filling components slurry, adding to the furnish the pretreated slurry and adding to the furnish from about 0.003 to about 0.5% by weight based on total solids in the slurry of a polymeric flocculent, whereby retention and drainage of filling components in the paper making furnish is increased. A preferred enhancer is a condensate of phenol and formaldehyde and preferred flocculants contain acrylamide, methacrylamide, and/or N-vinylformamide. The method provide important benefits in many papermaking applications, in which desirable filling components are retained in the final sheet, while undesirable filling components, such as ink and dye particles present in a recycled papermaking furnish, are not retained.
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Armstrong John R.
Jakubowski Regina
Pruszynski Przemyslaw
Rosencrance Scott W.
Breininger Thomas M.
Brumm Margaret M.
Fortuna Jose
Nalco Chemical Company
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