Change search
ReferencesLink to record
Permanent link

Direct link
Residual stresses in paperboard through the manufacturing process
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).ORCID iD: 0000-0001-8699-7910
2005 (English)In: Journal of Pulp and Paper Science (JPPS), ISSN 0826-6220, Vol. 31, no 4, 197-201 p.Article in journal (Refereed) Published
Abstract [en]

The residual stresses in a machine-made multi-ply board with chemical pulp in all plies were monitored as the board progressed after the initial drying through calendering, moisture treatments and coating. After drying, the stresses were compressive near the surfaces. In the coated board at the end of the machine, the stress state was reversed to a large extent with tensile stresses in the outermost layers. The various moisture applications on the board in the post-processing steps are regarded to have caused the change in the residual stress state. In another machine-made board, with mechanical pulp in the middle plies, the stresses after drying were limited to the surface plies made from chemical pulp, but were again compressive at the surfaces. This stress state was largely unaffected by post-processing. The possibility for stress reversal and the implications on in-plane and out-of-plane dimensional stability of the boards are discussed.

Place, publisher, year, edition, pages
2005. Vol. 31, no 4, 197-201 p.
Keyword [en]
multiply boards, stresses, tensile stress, chemical pulps, board machines
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-8190ISI: 000234572400007ScopusID: 2-s2.0-30844451592OAI: diva2:13445
Available from: 2005-11-02 Created: 2005-11-02 Last updated: 2011-08-31Bibliographically approved
In thesis
1. Residual stresses in paperboard and the influence of drying conditions
Open this publication in new window or tab >>Residual stresses in paperboard and the influence of drying conditions
2005 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

The drying sequence in the manufacturing process for paperboard involves evaporation of water, primarily from within the fibres. The vapour is then transported out of the web by pressure or concentration gradients. As the moisture transport from the paper web to the ambient is quicker than the moisture transport within the fibre network to the surfaces of the web, moisture gradients develop through the thickness of the web. This work concerns effects on the mechanics of paper drying from the variation in moisture through the relatively thin structures of paper and paperboard.

Distributions of inplane residual stresses through paper materials in the unloaded state after drying are believed to be caused by the varying moisture through the thickness during drying. The distributions in general exhibit compressive stress near the board surfaces and tensile stress in the interior of the board. This may be modified after drying and is also affected by structural variation in the material between different plies of multi-ply paperboards.

The stress development during drying is important because it influences the resulting material properties of the paper and because it can lead to curl, which is a quality problem. The residual stresses themselves are an error source in simulation or evaluation of the mechanical behaviour of paper.

In this work, residual stress distributions in paperboard were determined experimentally, to clarify the mechanisms of residual stress build-up. An experimental method for such tests was also developed. Based on the experimental findings, the mechanics of paper drying was modelled and the stress build-up simulated. Simulation offers a way of studying how the properties of paper develop during drying of wet paper webs.

Place, publisher, year, edition, pages
Stockholm: Hållfasthetslära, 2005. 21 p.
Trita-HFL. Report / Royal Institute of Technology, Solid mechanics, ISSN 1654-1472 ; 0393
paper, drying, mechanical properties, residual stress, curl
National Category
Mechanical Engineering
urn:nbn:se:kth:diva-469 (URN)
Public defence
2005-11-18, F3, Lindstedtsvägen 26, 10:00
Available from: 2005-11-02 Created: 2005-11-02 Last updated: 2013-01-14Bibliographically approved

Open Access in DiVA

No full text


Search in DiVA

By author/editor
Östlund, MagnusÖstlund, Sören
By organisation
Solid Mechanics (Div.)Solid Mechanics (Dept.)
In the same journal
Journal of Pulp and Paper Science (JPPS)
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 96 hits
ReferencesLink to record
Permanent link

Direct link