D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 21/10 (2006.01) D21H 23/04 (2006.01) D21H 17/33 (2006.01) D21H 17/37 (2006.01) D21H 17/45 (2006.01)
Patent
CA 2591299
The invention relates to a method for producing paper with a high substance weight. According to said method, a paper material is dewatered on a screen in the presence of a combination of at least two polymers that act as a retention and dewatering agent system, forming sheets, which are then dried. The sheet formation takes place without the use of fine-particled inorganic flocculants and (a) at least one polymer containing amino groups and (b) at least one branched cationic polyacrylamide are used as the retention and dewatering agent.
L'invention concerne des procédés pour produire du papier à grammage élevé comprenant le dessèchement d'un matériau en papier sur une toile, en présence d'une combinaison d'au moins deux polymères utilisée en tant que système d'agents de dessèchement et de rétention, lors de la formation de feuilles et du séchage desdites feuilles, la formation de feuilles étant réalisée en l'absence d'agents de floculation inorganiques, en fines particules. Les agents de dessèchement et de rétention correspondent (a) à au moins un polymère contenant un groupe amino et (b) au moins un polyacrylamide cationique ramifié.
Blum Rainer
Koch Oliver
Van Dijk Ron
Basf Aktiengesellschaft
Robic
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