Production of paper, board and cardboard

Details Production of paper, board and cardboard Production of paper, board and cardboard

1991-01-16

1992-09-08

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621646, 1621683, 162183, D21H 1745

Patent

active

051455595

ABSTRACT:
Paper, board and cardboard are produced by draining a paper stock, containing undesirable substances, in the presence of hydrolyzed homo- and/or copolymers of N-vinylformamide having a degree of hydrolysis of not less than 60% and a cationic retention aid. According to the invention, faster drainage and improved retention are obtained compared with the use of known fixing agents.

REFERENCES:
patent: 3597314 (1971-08-01), Laube et al.
patent: 4421602 (1983-12-01), Brunnmueller et al.
patent: 4774285 (1988-09-01), Pfohl et al.

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