Properties of paper coated with kaolin: The influence of the rheological modifier
authors Conceicao, S; Santos, NF; Velho, J; Ferreira, JMF
nationality International
author keywords kaolin; rheology; carboxymethyl cellulose; coating colours; coated papers
abstract The first part of this paper analyses the influence of the molecular weight and concentration of carboxymethyl cellulose (CMC) and of kaolin concentration oil rheology of the coating colours and on paper properties coated With Ultra lightweight coatings (ULWC). In the second part, relationships between the rheological characteristics of the coating colour formulations and coated paper surface quality was also studied. New indexes on paper roughness at micro-scale are presented (RZI and SRI). In general, they show good correlation with sheet gloss. A new gloss index (SGI) is presented, accounting for the contribution Of gloss from machine direction (MD) and cross direction (M). Porosimetry Was used to access microstructural characteristics in order to correlate them with light scattering and gloss properties. The former property is closely related to Hg intrusion volume of the coated layer while gloss is related to surface porosity with pore diameters in the range of 7-15 mu m as Measured by Hg intrusion volume. (c) 2005 Elsevier B.V. All rights reserved.
issn 0169-1317
year published 2005
volume 30
issue 3-4
beginning page 165
ending page 173
digital object identifier (doi) 10.1016/j.clay.2005.03.010
web of science category Chemistry, Physical; Materials Science, Multidisciplinary; Mineralogy
subject category Chemistry; Materials Science; Mineralogy
unique article identifier WOS:000233755800003
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