Paper production

Details Paper production Paper production

1988-01-06

1990-03-27

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621812, 1621813, 1621815, 162183, D21H 320

Patent

active

049117904

ABSTRACT:
The present invention relates to a process for obtaining retention of the manufacture of paper, whereby one adds a cationic, high polymer polysaccharide at the preparation of a stock of paper pulp; that one adds an anionic aluminium compound, or a combination of an aluminium salt and an alkali or an acid to the formation in situ of 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.

REFERENCES:
patent: 3074843 (1963-01-01), Lagally et al.
patent: 4487657 (1984-12-01), Gomez
patent: 4591412 (1986-05-01), Hechler
patent: 4710270 (1987-12-01), Sunden et al.

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