Paperboard containing microplatelet cellulose particles

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 19/42 (2006.01) C09D 101/00 (2006.01) D21H 19/82 (2006.01) D21H 21/52 (2006.01) D21H 27/10 (2006.01)

Patent

CA 2632237

A paperboard containing microplatelet cellulose particles has improved surface smoothness, aesthetic properties, bending stiffness and strength performance. When microplatelet cellulose particles are used for surface treatment of the paperboard, the microplatelets fill voids between fibers on the board surface. As a result, treated board has enhanced strength and surface properties such as smoothness, opacity, coating hold-out, and printability without compromising bending stiffness. Furthermore, the present disclosure relates to a process for improving board strength, surface smoothness and/or bending stiffness without the needs for densification, while maintaining other desired performances.

La présente invention concerne un carton, renfermant des particules de cellulose en microlamelles, qui présente une surface plus lisse, de meilleures caractéristiques esthétiques, ainsi qu'une rigidité à la flexion et une résistance à la contrainte renforcées. Lorsque les particules de cellulose en microlamelles sont utilisées pour traiter la surface du carton, les microlamelles remplissent les espaces vides présents entre les fibres sur la surface du carton. Le carton traité possède alors une résistance accrue et des caractéristiques de surface améliorées, telles que l'aspect lisse, l'opacité, le maintien du revêtement et l'imprimabilité et ce, sans compromettre la rigidité à la flexion. En outre, l'invention a trait à un procédé permettant d'améliorer la résistance du carton, l'aspect lisse de sa surface et/ou sa rigidité à la flexion sans nécessiter de densification, tout en conservant les autres performances souhaitées.

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