Mechanical properties of paperboard with a needled middle layer

Maria Klingberg, Antal Boldizar*, Karin Hofer

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Needling of formed kraft pulp at a dry content of 20% was previously shown to result in a redistribution of the fibres in the plane, resulting in local regions with a higher fibre structure density. The bending properties of a three-ply paperboard with a needled middle layer have been studied here, and it is shown that a needled middle layer can increase the bending resistance of a layered board by 8% and that the peak bending angle can be increased by up to 20%, although the bending stiffness may not be changed significantly. The needled middle layers had a higher compressive stiffness in the out-of-plane direction, but the effect of the needling on the tensile strength in the out-of-plane direction was insignificant.

Original languageEnglish
Pages (from-to)89-97
Number of pages9
JournalCellulose Chemistry and Technology
Volume52
Issue number1-2
Publication statusPublished - 1 Jan 2018

Keywords

  • Bending properties
  • Fibre network structure
  • Folding
  • Needle punching
  • Paperboard

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry

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