Paper production

Details Paper production Paper production

D - Textiles, Paper

21

H

9/42

D21H 17/24 (2006.01) D21H 17/29 (2006.01) D21H 17/66 (2006.01) D21H 23/18 (2006.01)

Patent

CA 1283761

ABSTRACT OF THE DISCLOSURE The present invention relates to a process for obtaining retention in the manufacture of paper, comprising adding a cationic, high polymer polysaccharide at the preparation of a stock of paper pulp; and adding an anionic aluminium compound, or a combination of an aluminium salt and an alkali or an acid which form in situ such an anionic aluminium compound, immediately prior to the head box, whereby pH immediately prior to the head box is kept at pH 7 to 8. The process improves retention, dewatering and pressability, econo- mically.

556076

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