Papermaking
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United States of America Patent
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-
May 31, 1983
Grant Date -
N/A
app pub date -
Feb 26, 1981
filing date -
Feb 26, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A papermaking process in which an aqueous papermaking 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 properties and improved retention of filler and fines on the wire.
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