Process for manufacture of paper

Details Process for manufacture of paper Process for manufacture of paper

1992-05-28

1994-03-15

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

162175, 162183, D21H 1728

Patent

active

052943011

ABSTRACT:
A process for the manufacture of paper from pulp employs at least one graft copolymer of starch selected from the group consisting of starch graft-polymethacrylic acid, starch graft-polyacrylic acid, cationic starch graft-polymethacrylic acid and cationic starch graft-polyacrylic acid as a wet-end additive. The graft copolymer preferably has an add on amount of acid of from about 0.1 to about 50% based on the weight of the starch, and is typically added to cellulosic pulp in an amount of from about 0.1 to about 10% based on the weight of the pulp. Such wet-end additives are also useful in processes involving relatively high alum levels of up to about 15 or 25%, based on the weight of the pulp.

REFERENCES:
patent: 3785921 (1974-01-01), Ide et al.
patent: 4604163 (1986-08-01), Van Eeenam

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