Paperboard is commonly used in packaging mainly due to its lightweight and that it is easily cut and formed. By improving the stiffness of the paperboard but still keeping the quality properties of it, less material can be used. By chemical modification of cellulosic fibres or by crosslinking of the cellulosic fibres it could be possible to improve the stiffness in low-density paperboard. Earlier studies within the project Formulosa have shown that modified cellulose treated by heat forms covalent crosslinks between cellulose chains. The continuation of the project is to explore alternative substituents for modification of cellulosic fibres and also alternative treatments to improve the stiffness of the paperboard. The stiffness of the paperboard is evaluated by measuring the tensile strength.

Rigid lightweight paperboard

243rd National Meeting (2012)

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