Improvements in paper making

Details Improvements in paper making Improvements in paper making

D - Textiles, Paper

21

H

D21H 21/10 (2006.01) D21H 17/29 (2006.01) D21H 17/37 (2006.01) D21H 17/45 (2006.01) D21H 17/68 (2006.01) D21H 23/14 (2006.01) D21H 17/71 (1990.01)

Patent

CA 2115560

A B S T R A C T Improved fines retention in a paper- making process may be employed by using as the binder a combination of natural hectorite and a medium/high molecular weight cationic polymer having an intrinsic viscosity in the range 5 to 25 dl/g and having a charge density of from 0.01 to 5 equivalents of cationic nitrogen per kilogram. The polymer is added to the furnish which is then subjected to high shear before adding the hectorite.

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