Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1988-06-30
1990-05-22
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-fiber additive
162175, 162178, 1621816, D21H 378
Patent
active
049274988
ABSTRACT:
An improvement in a papermaking process in which an aqueous paper furnish containing cellulosic pulp, and optionally also mineral fillers is formed and dried, the improvement being the addition of a drainage and retention aid comprising a water soluble alkali metal polyaluminosilicate microgels formed from the reaction of polysilicic acid and an alkali metal aluminate, the polyaluminosilicate having an alumina/silica mole ratio greater than about 1/100, together with a cationic polymer selected from the group consisting of cationic starch, cationic guar and cationic polyacrylamide.
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Chin Peter
E. I. Du Pont de Nemours and Company
Krukiel Charles E.
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