Papermaking process

Details Papermaking process Papermaking process

1989-07-17

1990-12-25

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621816, 162183, D21H 1744, D21H 1774

Patent

active

049800256

ABSTRACT:
In a process for making paper from an aqueous paper pulp, especially a pulp containing bleached/unbleached mechanical pulps or unbleached chemical pulps, a combination of chemicals is added for improving drainage and retention. As drainage-and retention-improving aids are added a cationic polyacrylamide and a sol of colloidal inorganic particles having at least one surface layer of aluminium silicate or aluminum-modified silicic acid.

REFERENCES:
patent: 4294885 (1981-10-01), Sunden
patent: 4309247 (1982-01-01), Hou et al.
patent: 4388150 (1983-06-01), Sunden et al.
patent: 4578150 (1986-03-01), Hou

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