Production of paper and paper board

Details Production of paper and paper board Production of paper and paper board

D - Textiles, Paper

21

H

D21H 23/76 (2006.01) D21H 17/29 (2006.01) D21H 17/45 (2006.01) D21H 17/55 (2006.01) D21H 17/56 (2006.01) D21H 17/68 (2006.01) D21H 21/10 (2006.01) D21H 21/28 (2006.01) D21H 21/30 (2006.01) D21H 23/14 (2006.01)

Patent

CA 2269701

Paper or paper board is made by adding cationic polymeric retention aid to a cellulosic suspension, shearing the suspension to degrade the resultant flocs, aggregating the suspension by adding an aqueous composition of bentonite or other anionic bridging coagulant in the present of anionic dye, pigment or optical brightening agent, and forming paper from the aggregated suspension.

L'invention concerne du papier ou du carton fabriqué en ajoutant un agent de rétention polymère cationique à une suspension cellulosique, en cisaillant ladite suspension afin d'altérer les flocons qui se sont formés, en réalisant l'agrégation de la suspension en ajoutant une composition aqueuse de bentonite ou d'un autre coagulant anionique de pontage en présence d'un colorant anionique, d'un pigment anionique ou d'un azurant optique, et en formant du papier à partir de la suspension dont on a réalisé l'agrégation.

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