Influence of Coating Binder Migration on Coated Paper Optical Properties

2013 ◽  
Vol 746 ◽  
pp. 114-117
Author(s):  
Zhao Hui Zhen ◽  
Zheng Shun Wang
Keyword(s):  
Optical Properties ◽  
Optical Density ◽  
Coating Layer ◽  
Surface Concentration ◽  
Coated Paper ◽  
Coating Surface ◽  
Binder Concentration

The coating binder migration and concentration in z-direction of coating layer especially in coating surface influence coated paper optical properties. The results showed that with the increase of coating surface binder migration, the calendaring gloss decreases, the printing gloss and the printing optical density increases. The calendaring gloss and printing gloss, compared to the influence of binder distribution in coating layer,seemed more subject to coating surface binder concentration. Binder in the coating surface concentration and distribution in z-direction almost did not affect the whiteness of coated paper.

Coating Binder Migration and Affected Parameters: Influence of Coating Process

2013 ◽  
Vol 791-793 ◽  
pp. 187-191
Author(s):  
Zhao Hui Zhen ◽  
Zheng Shun Wang
Keyword(s):  
Cross Section ◽  
Dwell Time ◽  
Coating Layer ◽  
Drying Rate ◽  
Coating Process ◽  
Coated Paper ◽  
Drying Temperature ◽  
Coating Surface ◽  
Binder Concentration ◽  
Coating Weight

The coating binder in cross-section of coating layer will be migrated, the binder concentration will be different in z-direction of coating layer, which affect some properties of coated paper. The paper studied the effects of coating progress on binder migration and affected factors. The z-direction distribution of the coating binder which was tagged with Br in coating layer and its concentration in coating surface were examined quantitatively by using SEM-EDXA and ESCA analysis. During coating process the drying rate, dwell time from coating device to dryer and coating weight affect the binder migration. The mechanism of binder migration was proposed. The results indicated that the degree of binder migration is directly proportional to the drying temperature and coating weight, but reduces with extending the dwell time.

Influence of Coating Binder Migration on Coated Paper Printing Properties

2013 ◽  
Vol 791-793 ◽  
pp. 286-289
Author(s):  
Zhao Hui Zhen ◽  
Zheng Shun Wang
Keyword(s):  
Cross Section ◽  
Coating Layer ◽  
Coated Paper ◽  
N Value ◽  
Coating Surface ◽  
Binder Concentration ◽  
Coating Color ◽  
Relationship Of ◽  
The Relationship

The coating binder migration and concentration in z-direction of coating layer especially in coating surface influence the coated paper printing properties. The results indicated that with the increase of coating surface binder migration, the coated paper opacity decreases, and the K&N value decreases. The relationship of K&N value and binder concentration in surface of coating layer was linear, which indicated that compared to binder dosage concentration in coating color, the K&N value and coating surface binder concentration has higher correlation. The more uniform the binder distribution in cross section of coating layer, the greater the IGT.

Study of Coating Binder Migration and Affected Parameters

2013 ◽  
Vol 790 ◽  
pp. 45-48 ◽  
Author(s):  
Zhao Hui Zhen ◽  
Zheng Shun Wang
Keyword(s):  
Calcium Carbonate ◽  
Cross Section ◽  
Coating Layer ◽  
Solid Content ◽  
Pigment Content ◽  
Drying Temperature ◽  
Coating Surface ◽  
Pigment Type ◽  
Binder Concentration ◽  
Coating Color

Because of the coating binder migration in cross-section of coating layer, the binder concentration will be different in z-direction of coating layer, which affect some properties of coated paper. The Paper studied the effects of pigment type, coating color solid content and dying temperature on binder migration and affected factors. The z-direction distribution of the coating binder which was tagged with Br in coating layer and its concentration in coating surface were examined quantitatively by using SEM-EDXA and ESCA analysis. The mechanism of binder migration was also proposed. The results indicated that the degree of binder migration is directly proportional to the drying temperature, that the increase of the ratio of calcium carbonate in the pigment content, coating surface binder concentration increased. The result also indicated that the degree of binder migration was increased with reduced the coating solid content.

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

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.

Specks masking by the coating layer in coated paper made from deinked pulp

2012 ◽  
Vol 27 (2) ◽  
pp. 466-471
Author(s):  
Patrick Huber ◽  
Laurent Lyannaz ◽  
Bruno Carré
Keyword(s):  
Optical Properties ◽  
Computer Simulations ◽  
Coating Layer ◽  
Optical Measurements ◽  
Coated Paper ◽  
Base Paper ◽  
Critical Requirement ◽  
Contrast Reduction ◽  
The Impact

Abstract Production of lightweight coated paper (LWC) utilises more and more deinked pulp (DIP), for both economical and environmental reasons. A critical requirement on DIP quality for such grades is the cleanliness of the pulp. Indeed, the coating layer may not fully cover specks in the base paper. The objective of this work was to determine the required specifications of the coating layer to produce LWC with DIP base paper. The specks masking phenomena by the coating layer was studied from both optical measurements on coated handsheets made from DIP, and computer simulations of specks contrast reduction. The impact of coating layer parameters (coat weight and optical properties), base paper parameters (grammage and optical properties) and specks nature (grammage and optical properties) on specks masking is studied.

Study on Coating Surface Topography and Properties of Coated Paper Related to Pigment

2012 ◽  
Vol 466-467 ◽  
pp. 504-507
Author(s):  
Ying Li ◽  
Bei Hai He
Keyword(s):  
Surface Topography ◽  
Surface Properties ◽  
Coating Layer ◽  
Layer Structure ◽  
Chemical Properties ◽  
Physical Structure ◽  
Coated Paper ◽  
Paper Surface ◽  
Coating Surface ◽  
Printing Ink

The physical structure and chemical properties of coating layer have an important influence on transferring and setting of the printing ink. In this study, the effect of pigment on coating layer structure and surface properties was investigated. The surface topography was explored using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The findings indicated that the pigment affected the pore size, depth and distribution of the coated paper surface. The conclusions were drawn that coating could improve coating surface topography and calcium carbonate pigment compared with kaolin pigment was not good to the paper surface properties, which resulted in high roughness, low paper gloss, high ink absorption and low paper surface efficiency.

Study on the Effect of Calender on Coating surface structure and Printability of Coated Paper

2014 ◽  
Vol 904 ◽  
pp. 46-49 ◽  
Author(s):  
Jian Guo Li ◽  
Ying Li
Keyword(s):  
Surface Structure ◽  
Visual Analysis ◽  
Coating Layer ◽  
Mercury Porosimetry ◽  
Lower Amount ◽  
Print Quality ◽  
Coated Paper ◽  
Paper Surface ◽  
Coating Surface ◽  
Printing Quality

The structure of the coating layer has a strong influence on the optical and physical properties of paper as well as on the print quality. Ink is transferred and sets onto the paper surface in the printing process, which affect printing quality and usage of ink. The objective of this experiment was to investigate the influence of calender on coating surface structure and Printability. The surface structure was explored in the method of numerical and visual analysis using mercury porosimetry measurement and scanning electron microscopy (SEM). The findings indicated that the calender treatment affected the pore size, depth and distribution of the coated paper surface. It could be concluded that Calender could increase the smoothness, gloss and paper surface efficiency of coated paper, which resulted in lower amount of ink usage, lower amount of ink absorption and higher print density.

scholarly journals The Effect of a Polymer-Stabilized Latex Cobinder on the Optical and Strength Properties of Pigment Coating Layers

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 568
Author(s):  
Zhenghui Shen ◽  
Araz Rajabi-Abhari ◽  
Kyudeok Oh ◽  
Sooyoung Lee ◽  
Jiachuan Chen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Coating Layer ◽  
Strength Properties ◽  
Porous Coating ◽  
Coated Paper ◽  
Pigment Coating ◽  
Surface Optical ◽  
Coating Layers ◽  
Coating Color ◽  
Polymer Stabilized

Coated paper with a porous coating layer may have enhanced light-scattering ability and thus favorable optical properties. However, the increased porosity of such a coating layer is likely to decrease the strength of the coated paper, thereby adversely affecting the quality of the paper in the printing and converting processes. In this research, polymer-stabilized (PS) latex was prepared and used as a cobinder for the pigment coating of the paper. The PS latex particles were colloidally stabilized by a 3:1 mixture of starch and polyvinyl alcohol. The influence of the PS latex cobinder on the viscosity, sedimentation, and consolidation of coating colors was investigated. In addition, the effect of the cobinder on the properties of coating layers, namely, their porosity and surface, optical, and tensile properties, was examined. The results revealed that the PS latex cobinder formed microstructures in the coating colors and affected their viscosity. The addition of PS latex also led to enhanced interactions between coating color components, which affected the consolidation of the coating color, resulting in the formation of dried coating layers with greater porosity and improved optical properties (i.e., higher brightness and opacity) relative to coatings without the PS latex cobinder. Furthermore, the addition of PS latex improved the tensile strength of the coating layers, which was attributable to the small size and the polymeric protective shell of the cobinder particles. Thus, these results show that this PS latex cobinder has the potential to be used for the production of high-quality coated paper products.

Coating Binder Migration and Affected Parameters: Influence of Pigments and Base Paper

2013 ◽  
Vol 791-793 ◽  
pp. 192-195
Author(s):  
Zhao Hui Zhen ◽  
Zheng Shun Wang
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Coating Layer ◽  
Pigment Content ◽  
Coating Surface ◽  
Base Paper ◽  
Small Base ◽  
Binder Concentration

The Paper studied the effects of pigments and base paper on binder migration and affected factors. The z-direction distribution of the coating binder which was tagged with Br in coating layer and its concentration in coating surface were examined quantitatively by using SEM-EDXA and ESCA analysis. The results showed that the increase of the ratio of calcium carbonate in the pigment content, coating surface binder concentration increased, and coating surface binder concentration increased with the increase of particle size of pigments. The result also indicated to small base paper absorbency, coating surface has high binder migration level, the coating layer bottom (base paper direction) has low binder concentration. To high absorbency base paper, the opposite is true.

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