Method for producing paper, paperboard and cardboard having...

Details Method for producing paper, paperboard and cardboard having... Method for producing paper, paperboard and cardboard having...

2011-04-12

2011-04-12

Hug, Eric (Department: 1741)

Paper making and fiber liberation

Processes and products

Non-fiber additive

C162S163000, C162S164100, C162S164600, C162S168100, C162S168200, C162S183000

Reexamination Certificate

active

07922867

ABSTRACT:
Process for the production of paper, board and cardboard having high dry strength by separate addition of a polymer comprising vinylamine units and of ligninsulfonic acid and/or a ligninsulfonate to a paper stock, draining of the paper stock and drying of the paper products.

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Jürgen Falbe, et al, “Römpp Chemie Lexikon”, 9. Erweiterte und neubearbeitete Auflage, Georg Thieme Verlag Stuttgart, 1990, 2 pages.

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