Papermaking

Details Papermaking Papermaking

D - Textiles, Paper

21

H

9/43

D21H 3/28 (1980.01)

Patent

CA 1154564

ABSTRACT A papermaking process in which an aqueous papermak- ing stock containing a cellulosic pulp is formed and dried. The stock includes a binder comprising colloidal silicic acid, and cationic starch which is added to the stock before the sheet is formed. The manner of addition involves first adding and intermixing in the stock a portion of the colloidal silicic acid and then the cationic starch and, after an agglomerate has formed, adding and intermixing the remainder of the colloidal silicic acid prior to the formation of the sheet. The method results in improved sheet pro- perties and improved retention of filler and fines on the wire.

373048

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