The wet strength of water- and foam-laid cellulose sheets prepared with polyamideamine-epichlorohydrin (PAE) resin

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    Abstract

    Some paper and paperboard grades require strength also when rewetted. The purpose of this study was to investigate the impact of web forming method, different foaming agents, polyamideamine-epichlorohydrin (PAE) wet strength resin, and retention aids on the strength development of hand sheets. Only a slight, if any, improvement in dry tensile strength due to PAE resin was observed. PAE improved the wet strength of the water-laid sheets, and the retention systems had a minor but positive impact. Although wet strength was lower at given PAE addition levels, the trend was similar with the sheets foamlaid
    with an anionic foaming agent, except at high PAE levels. With the non-ionic surfactant the maximum level of wet strength was reached already at a low PAE addition level and use of retention aids decreased wet strength. Such differences between the water- and foam-laid sheets are most likely due to the chemical interactions between PAE, foaming agents, and other additives.
    Original languageEnglish
    Pages (from-to)496-502
    Number of pages7
    JournalNordic Pulp and Paper Research Journal
    Volume33
    Issue number3
    DOIs
    Publication statusPublished - 2018
    MoE publication typeNot Eligible

    Keywords

    • foam forming
    • foam-laid forming
    • PAE
    • tensile strength
    • wet strength

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