Method and apparatus for producing board and a board product

Details Method and apparatus for producing board and a board product Method and apparatus for producing board and a board product

B - Operations, Transporting

31

F

B31F 1/20 (2006.01) B32B 29/08 (2006.01)

Patent

CA 2419177

A method is disclosed for producing a multilayer paperboard product, as well as an assembly suited for implementing the method and a paperboard manufactured according to the method, whereby the paperboard is made from at least two, advantageously three layers (4, 5, 6) bonded to each other by gluing, and the material of the middle layer (5) is subjected to mechanical working in a dry state (8) so as to deform the material prior to gluing through pressing thereon desired pattern that is raised from the surface of the material (5). The layers (4, 5, 6) are bonded to each other in a single step (7). The method is capable of providing a strong paperboard that uses less fiber than prior-art paperboards of equal thickness and strength.

L'invention concerne un procédé pour fabriquer un produit en carton multicouche, un dispositif adapté à l'application de ce procédé et du carton façonné selon ce dernier. Selon l'invention, le carton est constitué d'au moins deux et de préférence trois couches (4, 5, 6) collées ensemble. Le matériau de la couche médiane (5) est soumis à des sollicitations mécaniques à l'état sec (8), afin de modifier sa forme avant le collage en y pressant un motif choisi, mis en relief à partir de la surface dudit matériau (5). Les couches (4, 5, 6) sont assemblées en une seule opération (7). Ce procédé permet d'obtenir un carton fort, qui nécessite moins de fibre que les cartons de l'art antérieur, à épaisseur et à résistance égales.

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