Retention and drainage aid for papermaking

D - Textiles – Paper – 21 – H

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D21H 17/68 (2006.01) D21H 17/38 (2006.01) D21H 23/76 (2006.01) D21H 17/43 (2006.01) D21H 17/69 (2006.01) D21H 21/10 (2006.01) D21H 23/14 (2006.01)

Patent

CA 1324707

RETENTION AND DRAINAGE AID FOR PAPERMAKING ABSTRACT OF THE DISCLOSURE A papermaking stock comprising cellulose fibers in an aqueous medium at a concentration of preferably about 50% by weight of the total solids in the stock including a retention and dewatering aid comprising a two component combination of an anionic polyacrylamide and a cationic colloidal silicia sol. The stock exhibits enhanced resistance to shear forces during the papermaking process. A papermaking process is also de- scribed.

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