Improving the wet web strength and runnability

E. Retulainen (Corresponding author), K. Salminen, H. Lindqvist, A. Oksanen, Anna Sundberg

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-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 sur-face. Wet web strength has been shown to be a property even more sensitive to papermaking vari-ables than the dry strength. In addition to fibre and fines properties, also several chemical addi-tives have been found to improve the wet web strength. Also surfactant was found to have a con-siderable positive effect on wet web due to in-creased dry solids content after wet press. In-creased tension holding capability was found to require improved fibre network structure.
    Original languageEnglish
    Title of host publication65th Appita Annual Conference and Exhibition, Rotorua New Zealand 10-13 April 2011
    Subtitle of host publicationConference Technical Papers
    ISBN (Electronic)978-0-95774699-5
    Publication statusPublished - 10 Apr 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
    Conference number: 65


    Conference65th Appita Annual Conference and Exhibition
    Country/TerritoryNew Zealand


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