Structured kaolin used to fill paper

Details Structured kaolin used to fill paper Structured kaolin used to fill paper

D - Textiles, Paper

21

H

6/212, 9/58, 400

D21H 17/07 (2006.01) D21H 17/68 (2006.01) D21H 19/40 (2006.01)

Patent

CA 2029955

Abstract The present invention provide means for improving the opacifying properties of cationally bulked kaolin clay pigments when used as fillers for paper and paperboard. In accordance with this invention, a bulked hydrous kaolin clay paper filler is prepared by adding a water soluble cationic organic material such as a polyamine or a quaternary ammonium polyelectrolyte, in amount in excess of that required to flocculate the kaolin, but insufficient to redeflocculate the previously flocculated kaolin.

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