Improving the wet web strength and runnability

Elias Retulainen*, Kristian Salminen, Hanna Lindqvist, Antti Oksanen, Anna Sundberg

*Corresponding author for this work

Research output: Contribution to journalConference articleScientificpeer-review


This paper presents recent runnability research carried out in laboratory and pilot scale. Factors affecting adhesion, tensile strength, tension and residual tension after relaxation of wet web were studied. Adhesion of the web to surfaces was found to be - not only furnish specific - but also dependent on the temperature, dry solids content, chemical properties and contamination of the surface. Wet web strength has been shown to be a property even more sensitive to papermaking variables than the dry strength. In addition to fibre and fines properties, also several chemical additives have been found to improve the wet web strength. Also surfactant was found to have a considerable positive effect on wet web due to increased dry solids content after wet press. Increased tension holding capability was found to require improvements fibre network structure.

Original languageEnglish
Pages (from-to)57-63
Number of pages7
JournalAppita Annual Conference
Publication statusPublished - 2011
MoE publication typeA4 Article in a conference publication
Event65th Appita Annual Conference and Exhibition: Innovate for the Future - Rotorua, New Zealand
Duration: 10 Apr 201113 Apr 2011


  • Adhesion
  • Runnability
  • Strength
  • Web breaks
  • Wet web


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