Processing and structure of paperboard with a needled middle layer

Maria Klingberg, Antal Boldizar*, Karin Hofer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The possibility to change the fibre network structure of paperboard by using the needle punching method was studied. Needling was performed on the middle layer made from unbleached softwood kraft pulp at a dry content of 20%. The needled structure was studied by several microscopy methods, which showed that the fibres were redistributed mainly in-plane. Denser regions of the fibre network structure were observed close to the needle penetration sites. The local density was estimated to be 25% higher than that of the surrounding unaffected structure.

Original languageEnglish
Pages (from-to)315-323
Number of pages9
JournalCellulose Chemistry and Technology
Issue number3-4
Publication statusPublished - 1 Jan 2019


  • Fibre orientation
  • Needle punching
  • Network structure
  • Paperboard
  • Wood cellulose fibre

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry

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