Title: Surface Characteristics of Coated Paper Improved by Plastic Pigments and Synthetic Thickeners
Abstract: Synthetic thickeners, either polyacrylate or associative types, have been extensively used in paper coating. However, systematic research on the effect of these thickeners on coated paper surface structure in the presence of plastic pigment is still inadequate. In the current work, we compared and contrasted several commercial plastic pigments (PP), focusing on two hollow sphere and two solid bead plastic pigments having various particle sizes. Two types of polymeric thickeners were also selected, and their influence on the roughness and surface structure of coated paper were investigated. The results confirmed that the incorporation of plastic pigment in the clay coating mixtures resulted in a substantial decrease in the roughness of coated paper. The effect was particularly pronounced with hollow sphere plastic pigments. The addition of polymeric thickeners further reduced the roughness of the coated paper, for both clay/PP and ground calcium carbonate/PP systems. In coating mixtures based on clay, it was found that hydrophobically modified alkali swellable emulsion (HASE) thickener has a stronger effect on reducing the roughness of clay-based coated paper than polyacrylate thickener. The trend is opposite in the case of a ground calcium carbonate (GCC) coating system.
Publication Year: 2005
Publication Date: 2005-11-03
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 4
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