Leveling of surface defects in thin films of pigmented coatings

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Toivakka M, Kokko A, Salminen P, Urscheler R, Bousfield DW
Förläggare: ARBOR PUBLISHING AB
Publiceringsår: 2001
Tidskrift: Nordic Pulp and Paper Research Journal
Tidskriftsakronym: NORD PULP PAP RES J
Volym: 16
Nummer: 3
Artikelns första sida, sidnummer: 246
Artikelns sista sida, sidnummer: 250
Antal sidor: 5
ISSN: 0283-2631


Abstrakt

Leveling of surface irregularities in thin films of pigmented coatings was investigated. Artificially induced defects in a pilot scale coater trial were analyzed using a high-speed video camera, surface profilometry and optical microscopy. The influence of the defect geometry, rheological properties of the pigment suspension, substrate properties and process conditions was studied. The leveling rate of the defects was found to depend on both the elasticity and the viscous resistance of the coating suspension. Numerical simulations suggested that final dry widths of the defects were determined by immobilization of the uniform coating layer next to the defects.


Nyckelord

blade scratches, coating colors, coating defects, leveling, rheology, viscoelasticity

Senast uppdaterad 2019-10-12 vid 03:01