Top layer coatability on barrier coatings

Roger Bollström, Mikko Tuominen, Anni Määttänen, Jouko Peltonen, Martti Toivakka

    Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

    19 Citeringar (Scopus)

    Sammanfattning

    In this study, the influence of different surface characteristics of dispersion-coated barrier layers on top layer coatability is examined. The barrier layer consisted of platy pigments, such as talc and kaolin, combined with different amounts and types of latexes. Coating of the top coat was carried out using the reverse gravure technique in which a dispersion consisting of mineral pigments and latex is applied under slight pressure onto the barrier-coated substrate. Wettability and coatability were measured as a function of surface energy and surface roughness of the barrier layer and the surface tension of the top coat dispersion. Plasma and corona surface treatments were used to increase the surface energy and wettability without affecting the surface topography. The most important aspect for predicting the coatability was the wettability, especially the water contact angle, because the top coat is an aqueous suspension. Decreasing the surface tension of the top coat dispersion also improved the coatability, whereas roughness had only a minor effect.
    OriginalspråkOdefinierat/okänt
    Sidor (från-till)26–32
    Antal sidor7
    TidskriftProgress in Organic Coatings
    Volym73
    Utgåva1
    DOI
    StatusPublicerad - 2012
    MoE-publikationstypA1 Tidskriftsartikel-refererad

    Nyckelord

    • Barrier properties
    • Coatability
    • Surface properties
    • Surface treatment
    • Wettability

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