TY - JOUR

T1 - Inkjet ink spreading, absorption and adhesion on substrates coated with thin layers of cationic polyelectrolytes

AU - Mielonen, Katriina

AU - Geydt, Pavel

AU - Tåg, Carl Mikael

AU - Backfolk, Kaj

N1 - Publisher Copyright: © 2015, SPCI. All rights reserved.

PY - 2015

Y1 - 2015

N2 - The effect of a thin layer of cationic polyelectrolyte coating on ink spreading, absorption and adhesion on a paper substrate has been studied. Four different cationic polyelectrolytes with different chemistries and physical properties were coated onto an 80 g/m2 wood free paper. The samples were printed on two desktop printers using a water-based ink with dye and pigment colorants, respectively. An improvement in print quality was observed with increasing amount of cationic polymer, especially with the pigmented ink. Surprising effects concerning the dye ink print density were seen on coating containing certain cationic polymers. The print mottle and ink bleeding behavior indicate that the cationic charge density of the polymer alone cannot explain the colorant fixation efficiency. The colorant- capturing mechanism is a complex mechanism where the accessibility and activation of the cationic sites must also be considered. This was confirmed when the coat weight dependence was analysed.

AB - The effect of a thin layer of cationic polyelectrolyte coating on ink spreading, absorption and adhesion on a paper substrate has been studied. Four different cationic polyelectrolytes with different chemistries and physical properties were coated onto an 80 g/m2 wood free paper. The samples were printed on two desktop printers using a water-based ink with dye and pigment colorants, respectively. An improvement in print quality was observed with increasing amount of cationic polymer, especially with the pigmented ink. Surprising effects concerning the dye ink print density were seen on coating containing certain cationic polymers. The print mottle and ink bleeding behavior indicate that the cationic charge density of the polymer alone cannot explain the colorant fixation efficiency. The colorant- capturing mechanism is a complex mechanism where the accessibility and activation of the cationic sites must also be considered. This was confirmed when the coat weight dependence was analysed.

KW - Anionic polyelectrolyte

KW - Cationic polyelectrolyte

KW - Coating

KW - Ink

KW - Inkjet

KW - Print quality

UR - http://www.scopus.com/inward/record.url?scp=84925440371&partnerID=8YFLogxK

U2 - 10.3183/npprj-2015-30-01-p179-188

DO - 10.3183/npprj-2015-30-01-p179-188

M3 - Article

AN - SCOPUS:84925440371

VL - 30

SP - 179

EP - 188

JO - Nordic Pulp and Paper Research Journal

JF - Nordic Pulp and Paper Research Journal

SN - 0283-2631

IS - 1

ER -