Precalendering method, finishing method and apparatus for...

Details Precalendering method, finishing method and apparatus for... Precalendering method, finishing method and apparatus for...

D - Textiles, Paper

21

G

D21G 1/00 (2006.01) D21H 23/30 (2006.01)

Patent

CA 2412441

In the method for precalendering a paper or paperboard web (W) a web that has undergone earlier dewatering stages is calendered to attain a suitable surface for the coating process. The web is calendered (C) one-sidedly in such a manner that the absorption level of the second side (W2) of the web entering the calendering, which is higher than the absorption level of the first side (W1), is reduced in the calendering nearly to the same level or at least to the same level with the first side (W1).

L'invention concerne un procédé de pré-calandrage d'une bande de papier ou de carton, dans lequel une bande, qui a subi des opérations préalables d'égouttage, est calandrée afin d'obtenir une surface convenable pour le processus de couchage. La bande est calandrée (C) d'un côté de manière à ce que le niveau d'absorption du deuxième côté (W2) de la bande entrant dans la calandre, qui est plus élevé que le niveau d'absorption du premier côté (W1), soit réduit dans le calandrage à peu près au même niveau ou au moins au même niveau que le premier côté (W1).

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