Method and apparatus for producing sized paper or board

D - Textiles – Paper – 21 – H

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Details

D21H 23/22 (2006.01) D21H 21/16 (2006.01) D21H 23/26 (2006.01)

Patent

CA 2450838

A method and assembly is disclosed for manufacturing a sized web of paper or paperboard, the method comprising the steps of first forming the web at a headbox (1) from a stock comprising at leastwater and fiber, then pressing the web for water drainage, and finally drying the web by heating. Size furnish is added to the web so that at least a portion of the overall amount of size is added to the web prior to initiating the drying of the web by heating, and at least a portion of the overall amount of size is applied to the web after initiating the drying of the web.

L'invention concerne un procédé et un ensemble servant à fabriquer une bande de papier ou de carton encollée, ce qui consiste d'abord à créer la bande au niveau d'un caisson de tête (1) à partir d'une matière première composée au moins d'eau et de fibres, puis à comprimer cette bande afin d'en drainer l'eau et enfin à sécher ladite bande par réchauffement. On ajoute la colle à la bande, de manière à ajouter au moins une partie de la totalité de la quantité de colle à la bande préalablement au début du séchage de cette bande par réchauffement et on applique au moins une partie de la totalité de la quantité de colle à la bande après le début du séchage de cette dernière.

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