PROCESSING AND STRUCTURE OF PAPERBOARD WITH A NEEDLED MIDDLE LAYER

Department of Materials and Manufacturing Technology, Chalmers University of Technology, Gothenburg, Sweden; MARIA KLINGBERG; ANTAL BOLDIZAR; Department of Materials and Manufacturing Technology, Chalmers University of Technology, Gothenburg, Sweden; KARIN HOFER; Institute of Paper, Pulp and Fiber Technology, Graz University of Technology, Graz, Austria

doi:10.35812/cellulosechemtechnol.2019.53.31

journal article·2019-04-26Open access

PROCESSING AND STRUCTURE OF PAPERBOARD WITH A NEEDLED MIDDLE LAYER

Department of Materials and Manufacturing Technology, Chalmers University of Technology, Gothenburg, Sweden, MARIA KLINGBERG, ANTAL BOLDIZAR, Department of Materials and Manufacturing Technology, Chalmers University of Technology, Gothenburg, Sweden, KARIN HOFER, Institute of Paper, Pulp and Fiber Technology, Graz University of Technology, Graz, Austria

Cellulose Chemistry and Technology· Volume 53· Issue 3-4

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Source abstract

Abstract

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.

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Research context

OpenAlex topics: Material Properties and Processing · Advanced Cellulose Research Studies · Digital Image Processing Techniques

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