Method and apparatus for treating the surface of a web

Details Method and apparatus for treating the surface of a web Method and apparatus for treating the surface of a web

D - Textiles, Paper

21

H

D21H 23/30 (2006.01) D21H 25/04 (2006.01)

Patent

CA 2335631

In the method for treating the surface of the web, liquid is added on the surface of a paper or paperboard web (W), possibly with other constituents. The absorbency of the surface of the paper or paperboard web is increased before liquid is brought on the surface of the web or simultaneously with bringing the liquid on the surface of the web. The method is used for wetting the surface of the web before calendering, or for coating the web in surface sizing or pigmenting. The absorbency of the surface is increased before bringing the liquid for example by means of a corona treatment, a flame treatment, an ozonization or by adding steam.

Dans le procédé de traitement de la surface d'une bande, un liquide est ajouté sur la surface d'une bande de papier ou de carton (W), éventuellement avec d'autres constituants. Le pouvoir absorbant de la surface de la bande de papier ou de carton est augmenté avant que le liquide ne soit amené sur la surface de la bande ou simultanément à l'arrivée du liquide sur la surface de la bande. Le procédé est utilisé pour humidifier la surface de la bande avant le calandrage ou pour coucher la bande dans le collage ou la pigmentation de la surface. Le pouvoir absorbant de la surface est augmenté avant que ne soit amené le liquide, par exemple, à l'aide d'un traitement corona, à flammage, une ozonisation ou par addition de vapeur.

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