Retention and drainage aid for papermaking

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 form...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: RUSHMERE, JOHN D
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung: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.