Cationic anionic polyelectrolytes for enhancing the freeness of

Details Cationic anionic polyelectrolytes for enhancing the freeness of Cationic anionic polyelectrolytes for enhancing the freeness of

1994-03-07

1995-06-13

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

162 9, 162 72, 162100, 1621682, 1621683, 162182, D21H 2110

Patent

active

054239460

ABSTRACT:
A process for improving the freeness of paper pulp, which comprises the steps of adding to the pulp at least 0.05%, based on the dry weight of the pulp, of a cellulolytic enzyme, allowing the pulp to contact the cellulolytic enzyme for from about 40 minutes to about 60 minutes at a temperature of at least 40.degree. C., adding at least 0.011%, based on the dry weight of the pulp, of a water soluble cationic polymer, adding at least 0.007%, based on the dry weight of the pulp, of a water soluble anionic or nonionic polymer and forming the thus treated pulp into paper.

REFERENCES:
patent: 4923565 (1990-05-01), Fuentes et al.
patent: 5169497 (1992-12-01), Sakar et al.

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