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.

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.

A Study of Coating Surface Microstructure and Characteristics of Coated Paper Related to Binder

2013 ◽  
Vol 650 ◽  
pp. 292-297 ◽  
Author(s):  
Ying Li ◽  
Wen Juan Gu ◽  
Bei Hai He
Keyword(s):  
Pore Size ◽  
Surface Topography ◽  
Visual Analysis ◽  
Mercury Porosimetry ◽  
Surface Characteristics ◽  
Surface Microstructure ◽  
Coated Paper ◽  
Paper Surface ◽  
Force Microscopy ◽  
Coating Surface

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 on the coating surface topography and characteristics. The surface microstructure was explored in the method of numerical and visual analysis using mercury porosimetry measurment and atomic force microscopy (AFM). The findings indicated that the binder content on the coating surface affected the pore size, depth and distribution of the coated paper surface. The conclusions were drawn that more amount of binder on the coating surface could contribute to improve the coating surface topography and the formation of even pore size and distribution, which was good to the paper surface characteristics and resulted in low roughness, high paper gloss, low ink absorption and high paper surface efficiency.

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.

Relationship between Binder Content and Ink Absorption of Coated Paper

2013 ◽  
Vol 650 ◽  
pp. 206-210
Author(s):  
Ying Li ◽  
Wen Juan Gu ◽  
Bei Hai He
Keyword(s):  
Surface Structure ◽  
Laser Scanning ◽  
Coating Layer ◽  
Binder Content ◽  
The Other ◽  
Coated Paper ◽  
Laser Scanning Confocal Microscope ◽  
Printing Quality ◽  
Penetration Behavior ◽  
The Relationship

The ink penetration behavior depends on the coating surface structure and surface properties of the coating layer in the papermaking process, which include coating recipes and coating conditions, etc. The objective of this experiment was to investigate the relationship between binder content and ink absorption using laser scanning confocal microscope (LSCM). Fluorescent ink was used to observe and characterize ink penetration and distribution in coated paper by LSCM. The results indicated that higher binder content could result in higher amount ink absorption. With the increasing of binder content, ink penetration depth in coated paper increased. Sample G2 with 20 parts binder produced the most unevenness ink distribution. It could be concluded that the coated paper with 25 parts binder compared with the other samples resulted in higher ink usage and better printing quality.

Investigation into the Coating Surface Topography and Properties of Paper Related to Drying Condition

2011 ◽  
Vol 233-235 ◽  
pp. 1614-1618 ◽  
Author(s):  
Ying Li ◽  
Bei Hai He
Keyword(s):  
Surface Topography ◽  
Coating Layer ◽  
Layer Structure ◽  
Chemical Properties ◽  
Print Quality ◽  
Paper Properties ◽  
Drying Temperature ◽  
Paper Surface ◽  
Coating Surface ◽  
Drying Condition

The physical structure and chemical properties of coating layer have an important influence on transferring and setting of the printing ink. The typical objective of coating is to improve the appearance and printing properties of paper. In this study, the effect of drying condition on coating layer structure, surface properties, and print quality was investigated. The relationship between surface topography and drying condition was explored using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The conclusions were drawn that high and low drying temperature were not good to the paper properties, which resulted in high roughness, low paper gloss, high ink absorption, low print gloss and paper surface efficiency. The findings indicated that the coating drying temperature affected the pore size, depth and distribution of the coated paper surface. Moderate temperature was benefit to pigment particles and binder arranging orderly, which made the coating surface had high smoothness, gloss, paper surface efficiency, and modest ink absorption.

Printing Performance of Different Pigment Coated Paper

2012 ◽  
Vol 549 ◽  
pp. 601-604
Author(s):  
Yan Zhang ◽  
Tie Qing Su
Keyword(s):  
Surface Chemistry ◽  
Print Quality ◽  
High Porosity ◽  
Color Reproduction ◽  
Coating Structure ◽  
Coated Paper ◽  
Paper Surface ◽  
Porosity Structure ◽  
Dot Gain

For high print quality, halftone dots should have minimal dot gain and sharp, circular edges, the receiving surface must have a line, high-porosity structure and be hydrophilic. Paper surface chemistry requirements for good inkjet print quality are so unconventional that new paper grades for printing should be specially designed. In this paper, the printability, coating structure and the color reproduction after printing of coated paper was studied.

Investigation into Coating Surface Free Energy and Microstructure of Coated Paper Related to Pigment

2014 ◽  
Vol 884-885 ◽  
pp. 212-215
Author(s):  
Ying Li ◽  
Wen Juan Gu ◽  
Bang Gui He
Keyword(s):  
Free Energy ◽  
Calcium Carbonate ◽  
Surface Free Energy ◽  
Coating Layer ◽  
Physical Structure ◽  
Coated Paper ◽  
Paper Surface ◽  
Pigment Coating ◽  
Printing Ink ◽  
Better Than

The physical structure of coating layer have an important influence on transferring and setting of the printing ink. In this study, the effect of pigment on surface microstructure and surface free energy was investigated. The findings indicated that the pigment affected the pore size, depth and distribution of the coated paper surface. Kaolin pigment compared with calcium carbonate pigment was good to improve the paper surface smoothness. Surface free energy of kaolin pigment coating was higher than calcium carbonate pigment coating, which showed that surface wettability of coating with kaolin pigment was better than calcium carbonate pigment.

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.

Research on the Influence of Printing Pressure and Speed on Print Quality of Coated Paper

2013 ◽  
Vol 663 ◽  
pp. 286-290
Author(s):  
Ying Li ◽  
Wen Juan Gu ◽  
Bang Gui He
Keyword(s):  
Quantitative Analysis ◽  
Layer Thickness ◽  
Laser Scanning ◽  
Confocal Microscope ◽  
Print Quality ◽  
Coated Paper ◽  
Laser Scanning Confocal Microscope ◽  
Paper Surface ◽  
Printing Speed

What happens in the paper surface about ink absorption is of great important for appearance of final printing. The aim of this experiment was to investigate the influence of printing pressure and printing speed on ink layer thickness transferred onto coated paper through quantitative analysis by laser scanning confocal microscope (LSCM). Meanwhile, the influence of printing pressure and printing speed on print density and print gloss were obtained. The results implied that higher printing pressure resulted in higher ink layer thickness, print density and print gloss when printing pressure is less than 700N, but higher printing speed resulted in lower ink layer thickness, print density and print gloss when printing pressure is constant. It could be concluded that the coated paper with high printing speed compared with low printing speed resulted in lower ink absorption, lower print density, lower print gloss and worse printability on the condition of same printing pressure.

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