Cationic and anionic polyelectrolytes for enhancing the...

Details Cationic and anionic polyelectrolytes for enhancing the... Cationic and anionic polyelectrolytes for enhancing the...

D - Textiles, Paper

21

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D21H 17/44 (2006.01) C12S 3/08 (2006.01) D21C 3/00 (2006.01) D21C 5/02 (2006.01) D21H 17/00 (2006.01) D21H 17/37 (2006.01) D21H 17/41 (2006.01) D21H 17/42 (2006.01) D21H 21/10 (2006.01)

Patent

CA 2143985

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°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.

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