Process and apparatus for making papermaking belt using...

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 1/00 (2006.01) B29C 39/14 (2006.01) D21F 11/00 (2006.01)

Patent

CA 2342347

A process and an apparatus for making a papermaking belt (90) for making strong, absorbent and soft paper products without having to use a photosensitive resin are provided, the belt comprising a reinforcing structure (40) and a resinous framework (50) joined together. The preferred continuous process comprises the steps of depositing a flowable resinous material onto a patterned molding surface (20); continuously moving the molding surface and the reinforcing structure at a transport velocity such that at least a portion of the reinforcing structure is in a face-to-face relationship with a portion of the molding surface; applying a fluid pressure differential to transfer the flowable resinous material from the molding surface onto the reinforcing structure and causing the flowable resinous material and the reinforcing structure to join together; and solidifying the resinous material thereby forming the resinous framework joined to the reinforcing structure. The apparatus comprises a molding member having a patterned molding surface preferably comprising a plurality of molding pockets to carry a flowable resinous material therein; a means for depositing the flowable resinous material into the molding pockets of the molding surface; a means for moving the reinforcing structure and the molding member in a predetermined direction; and a means for creating a fluid pressure differential sufficient to transfer the flowable resinous material from the molding member to the reinforcing structure.

L'invention concerne un procédé et un appareil de fabrication de toile (90) de machine à papier. Ladite toile comprend une structure de renfort et un châssis résineux (50) accolés. Le procédé continu préféré comprend les étapes suivantes: dépôt d'un matériau résineux fluide sur une surface de moulage à motifs (20); déplacement continu de ladite surface et de la structure de renfort à une vitesse de transport telle qu'au moins une partie de ladite structure se trouve face à face avec une partie de la surface de moulage ; application d'un différentiel de pression par fluide de façon à transférer le matériau résineux fluide de la surface de moulage sur la surface de renfort, avec combinaison du matériau résineux fluide et de la structure de renfort; et solidification du matériau résineux pour former ainsi le châssis résineux combiné à la structure de renforcement. L'appareil comprend un moule comprenant une surface de moulage à motifs qui comporte, de préférence, une pluralité de poches de moulage destinées à transporter le matériau résineux fluide ; un dispositif permettant de déposer le matériau résineux fluide dans les poches de moulage de la surface de moulage; un dispositif permettant de déplacer la structure de renfort et le moule dans une direction donnée, et un dispositif permettant de créer un différentiel de pression par fluide suffisant pour transférer le matériau résineux fluide du moule à la surface de renforcement.

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