Evaluation of the Coated Paper Properties for the Effective Use of Insolubilizer - Influence of the pH Change of Coating Color -

Coatings based on pigment and polymer binders are applied on paper surfaces to improve their surface, optical, and printing properties. Besides the coating composition, the structure and properties of the coated papers are influenced by the coating layer consolidation upon drying. In this study, the influence of drying conditions on the structure and properties of coating layers based on natural pigments (clay) and polymer binders (butadiene acrylonitrile latex) has been analyzed. Using a laboratory rod Mayer device, the coatings were applied as thin layer (about 15–16 g/m2) on the paper surface and samples of coated paper were dried at 20 and 105 °C temperatures. The optical, structural, and water absorption properties of the coating layer were evaluated by the measurement of gloss, opacity, void fraction, light scattering, and contact angle. The obtained results highlighted that both the drying temperature and latex content in the coating color have a synergic effect on the coated paper quality.

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Functional surfaces produced by foam coating

TAPPI Journal ◽

10.32964/tj15.8.515 ◽

2016 ◽

Vol 15 (8) ◽

pp. 515-521 ◽

Cited By ~ 1

Author(s):

EIJA KENTTÄ ◽

HANNA KOSKELA ◽

SARA PAUNONEN ◽

KARITA KINNUNEN-RAUDASKOSKI ◽

TUOMO HJELT

Keyword(s):

Life Time ◽

Silica Coating ◽

Foaming Properties ◽

Coated Paper ◽

Paper Properties ◽

Foaming Agent ◽

Foaming Agents ◽

Size Stability ◽

Stability Measurement ◽

Standard Paper

This paper reports experiments on silica coating formulations that are suitable for application as a thin pigment layer with foam coating technique on a paper web. To understand the foaming properties of nanosilica dispersions, the critical micelle concentration, foam half-life time, and foam bubble size stability were determined with three different foaming agents. The results indicate that the bubble stability measurement is a useful characterization method for foam coating purposes. Pilot foam coating trials were done and the effects of the chosen foaming agents were studied on the properties of the nanosilica-coated paper. The surface hydrophilicity of silica coated paper was related not only to silica pigment, but also to the chemical nature of the foaming agent. Standard paper properties were not affected by the thin silica coating.

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Numerical Characterization of the Effect of Coating Solid on Binder Distribution

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.496-500.388 ◽

2014 ◽

Vol 496-500 ◽

pp. 388-391

Author(s):

Ying Li ◽

Wen Juan Gu ◽

Bang Gui He

Keyword(s):

Laser Scanning ◽

Critical Surface ◽

Coated Paper ◽

Directional Distribution ◽

Base Paper ◽

Numerical Characterization ◽

Liquid Absorption ◽

Ink Setting ◽

Coating Color

Binder is the essential component of coating color recipe. The amount and type of latex binder has a significant effect on both the structure and chemical-physical properties of coated paper, which affect critical surface properties, e.g., print gloss, roughness, ink setting rate via liquid absorption, and print mottle The main aim of this study was to investigate the effect of coating solid on the binder distribution in the method of numerical analysis by Laser Scanning Confocal Microscope (LSCM). In this study, Rhodamine B was used to stain the binder and as the probe to characterize z-directional distribution of the binder using LSCM. The results implied that it was reliable and effective method using LSCM to characterize the z-directional distribution of binder and analyze the influence of coating solid on binder distribution in the z-direction. It could be concluded that the coating solid played an important effect on binder distribution in coated paper and low coating solid with more water accelerated binder migration to the interior of base paper, sample with 60% coating solid is good to binder distribution and coating layer forming.

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Modelling coated paper properties: application of neural networks

International Journal of Systems Science ◽

10.1080/00207729708929448 ◽

1997 ◽

Vol 28 (9) ◽

pp. 865-870

Author(s):

M. GORNIK ◽

G. NOVAK ◽

E. GOVEKAR

Keyword(s):

Neural Networks ◽

Coated Paper ◽

Paper Properties

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Analysis of Coating Pore Structure and its Effect on Printability of Low Gloss Coated Paper

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.236-238.1178 ◽

2011 ◽

Vol 236-238 ◽

pp. 1178-1182

Author(s):

Yan Xin Liu ◽

Yu Long Wang ◽

Shen Tao Qin ◽

Fei Fei Liu

Keyword(s):

Pore Structure ◽

Pore Size ◽

Pore Volume ◽

Coating Layer ◽

Layer Structure ◽

Capillary Absorption ◽

Coated Paper ◽

Base Paper ◽

Small Pore ◽

Coating Color

Coating pore structure of low gloss coated paper based on different pigment blends was analyzed using mercury intrusion method in this paper. The results show that pore size of coating layer structure of low gloss coated paper ranges from 20nm-500nm, and the range from 500nm-5000nm is mainly from base paper and interactions between coating color and base paper. Printability of coated paper can be well related with coating pore structure. Print gloss is strongly influenced by pore size and pore volume. Large pore diameters and small pore volume of coating layer structure can improve print gloss. Ink density increases with the increasing of pore diameter while the pore volume is kept constant. The increasing of pore volume of coat layer structure will improve capillary absorption and then improve ink absorption. The control of coating pore structure is very important for producing low gloss coated paper.

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Research on the Coating Surface Microstructure of Coated Paper Related to Binder Migration

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.881-883.1439 ◽

2014 ◽

Vol 881-883 ◽

pp. 1439-1442

Author(s):

Ying Li ◽

Wen Juan Gu ◽

Bang Gui He

Keyword(s):

Visual Analysis ◽

Coating Layer ◽

Mercury Porosimetry ◽

Surface Microstructure ◽

Coated Paper ◽

Force Microscopy ◽

Coating Surface ◽

Atomic Force ◽

Consolidation Phase ◽

Coating Color

The surface topography and properties of coating layer have an important influence on penetration and distribution of the print ink. In this research, the main objective was to investigate the effect of binder migration on the coating surface microstructure. The surface microstructure was explored in the method of numerical and visual analysis using mercury porosimetry measurement, scanning electron microscopy (SEM) and atomic force microscopy (AFM). The findings indicated that the binder migration on the coating surface affected the pore size, depth and distribution of the coated paper surface. The little binder migration in the consolidation phase of coating color made a contribution to the forming of the coating layer, which made the coating surface more smother to printing performance.

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