B - Operations – Transporting – 31 – F
Patent
B - Operations, Transporting
31
F
B31F 1/07 (2006.01)
Patent
CA 2663071
The invention relates to a process for manufacturing an absorbent sheet comprising at least two plies of cellulose wadding, consisting in combining said plies under pressure by passing between two steel cylindrical components, the first (1) being smooth on the outside and the second (2) being equipped with raised components on the outside and the hardness of the first cylindrical component being lower than that of the second cylindrical component. According to the invention, the first cylindrical component (1) has a treated hardened surface layer (11) and a deformable underlayer (12); the second cylindrical component has a hardened outer surface, and the sheet, when it passes between the two cylindrical components (1, 2), is compressed at a specific pressure between 40 and 250 N/mm2. Another subject of the invention is an assembly of steel cylindrical components (1, 2) intended for the manufacture of multiply absorbent sheets.
L'invention concerne un procédé de fabrication d'une feuille absorbante comprenant au moins deux plis d'ouate de cellulose, consistant à associer sous pression lesdits plis par passage entre deux éléments cylindriques en acier, le premier (1) étant extérieurement lisse et le second (2) étant extérieurement pourvu d'éléments en relief et la dureté du premier élément cylindrique étant inférieure à celle du second élément cylindrique. Conformément à l'invention, le premier élément cylindrique (1) présente une couche superficielle (11) traitée, durcie et une sous-couche déformable (12); le second élément cylindrique présente une surface extérieure durcie, et la feuille, lors de son passage entre les deux éléments cylindriques (1, 2), est comprimée à une pression spécifique comprise entre 40 et 250 N/mm2. L'invention a en outre pour objet un ensemble d'éléments cylindriques en acier (1, 2) destinés à la fabrication de feuilles absorbantes multi-plis.
Graff Pierre
Hoeft Benoit
Jeannot Sebastien
Probst Pierre
Georgia-Pacific France
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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