Papermaking

Details Papermaking Papermaking

1981-02-26

1983-05-31

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621816, 162183, D21H 328, D21H 366

Patent

active

043859615

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.

REFERENCES:
patent: 2647158 (1953-07-01), Booth
patent: 2865743 (1958-12-01), Weisgerber
patent: 3224927 (1965-12-01), Brown et al.
patent: 3227607 (1966-01-01), Mays et al.
patent: 3721575 (1973-03-01), Jarowenko et al.
patent: 3737370 (1973-06-01), Jarowenko et al.
Casey, Pulp and Paper, vol. II, (1960), pp. 746, 846, 1014, 1178, 1179.

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