Production of paper and paperboard

Details Production of paper and paperboard Production of paper and paperboard

D - Textiles, Paper

21

H

9/51

D21H 23/14 (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)

Patent

CA 1259153

ABSTRACT Production of Paper and Paper Board Paper or paper board is made by passing an aqueous cellulosic suspension through a centriscreen or other shear device and then draining the purified suspension, and an improved combination of retention, drainage, drying and formation is achieved by adding to the suspension an excess of high molecular weight linear synthetic cationic polymer before shearing the suspension and adding bentonite after shearing.

528070

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