Processing and structure of paperboard with a needled middle layer
Artikel i vetenskaplig tidskrift, 2019

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.

Fibre orientation

Network structure

Wood cellulose fibre


Needle punching


Maria Klingberg

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Antal Boldizar

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Karin Hofer

Technische Universität Graz

Cellulose Chemistry and Technology

0576-9787 (ISSN)

Vol. 53 3-4 315-323


Oorganisk kemi

Pappers-, massa- och fiberteknik

Multidisciplinär geovetenskap



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