Method and arrangement for controlling moisture in a...

Details Method and arrangement for controlling moisture in a... Method and arrangement for controlling moisture in a...

D - Textiles, Paper

21

G

D21G 1/00 (2006.01) D21G 7/00 (2006.01)

Patent

CA 2405137

A method and an arrangement for controlling evaporation and moisture in a multinip calender (10) when a continuous fibrous web (W) is calendered in calendering nips (1, 2, 3, 4, 5) placed one after the other before the fibrous web is wound on a reel-up/winder (9). It is characteristic of the invention that, with a view to making the net evaporation from and the final moisture content of the web (W) constant when the running situations in the calender (10) change, the web is passed in the calender from the outlet of at least one nip into an air-float chamber (20) of the turning airborne type.

La présente invention concerne un procédé et un agencement permettant de contrôler l'évaporation et l'humidité dans une calandreuse (10) à plusieurs lignes de contact lors du calandrage d'une bande fibreuse (W) continue dans les zones de pression de calandrage (1, 2, 3, 4, 5) placées en succession préalablement à l'enroulement de la bande fibreuse sur la bobineuse/enrouleuse (9). Selon l'invention, afin de maintenir constantes l'évaporation nette de la bande (W) et la teneur finale en humidité de celle-ci (W) lorsque les conditions opératoires dans la calandreuse (10) se modifient, on passe la bande dans la calandreuse à partir d'une sortie d'au moins une zone de pression vers une enceinte de séchage aéroportée (20) du type aéroportée en rotation.

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