Papermaking process with improved retention and drainage

Details Papermaking process with improved retention and drainage Papermaking process with improved retention and drainage

1992-03-17

1993-02-09

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621682, 1621683, 162183, D21H 1733

Patent

active

051850621

ABSTRACT:
A papermaking process includes the steps of adding to the papermaking cellulosic slurry first a high molecular weight cationic polymer and then a medium molecular weight anionic polymer, to improve drainage and retention. The anionic polymer includes ionizable sulfonate.

REFERENCES:
patent: 3021257 (1962-02-01), Stauffenberg
patent: 4749444 (1988-06-01), Lorz et al.
patent: 4913775 (1990-04-01), Langley et al.

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