Bang Gui He

Research on the Relationship between Drying Method and Binder Distribution by Tracing Technique

To observe binder distribution, and obtain the relationship between drying method and binder distribution in the z-direction, 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 dry method on binder migration. It could be concluded that the dry method was critical to binder distribution in coated paper and vacuum drying accelerated binder migration to the base paper, however vacuum drying made uniform binder distribution. Infrared drying was good to producing little binder migration towards the interior of base paper, but infrared drying was disadvantageous to even binder distribution.

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

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.

The Design of the Diameter Measuring Gauge of Filter Rod Forming Machine Based on TRIZ and TOC

The initial designed structure of the diameter measuring gauge of filter rod forming machine is too large, so that it cannot be installed in the limited space of filter rod forming machine. Because of this, the structure of the diameter measuring gauge is redesigned in order to overcome the space constraints of filter rod forming machine. Firstly, the diameter measuring gauge of KDF2、KDF3 type filter rod forming machine is redesigned by combining the advantages of the theory of inventive problem solving (TRIZ) and constraints (TOC). Next, through constraints theory, finding the main contradictions of initial design and then contradictions can be eliminated by using inventive problem solving theory. Finally, diameter measuring gauge of filter rod forming machine design should be available, and the product design successfully. It is the first time that this type diameter measuring gauge is designed and installed on the KDF2、KDF3 type filter rod forming machine successfully across the country.

The Statics Analysis of the Lathe Tool Based on Workbench

The 3D model of the lathe tool is established by using the Pro/E of 3D design software, then imported 3D model into the finite element software Workbench, and analyzed its statics using the finite element method, and got the stress figure and strain figure and total deformation figure while the lathe tool undertaking the cutting force, through the analysis it shows that the strength of the lathe tool can meet the processing requirements.

The Development of Tribology

In the past 20 years, with the rapid development of nanotechnology and increasing peoples social needs, tribology gained the rapid development. Meanwhile, many new areas produced. This article describes a simple spherical roller bearing down tribology design. Thus the development of tribology and trends are explained.

Numerical Characterization of the Effect of Coating Solid on Binder Distribution

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.

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

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.

Research on the Influence of Drying Method on Ink Penetration of Coated Paper

The aim of this study was to obtain the effect of drying methods on surface properties and ink penetration. Laser scanning confocal microscope (LSCM) was used in order to characterize the penetration depth through quantitative analysis. Fluorescent ink was used to observe and characterize ink penetration and distribution by LSCM. The results showed that the drying methods had an important role on the surface properties and ink penetration of coated paper. Infrared drying compared with vacuum drying and hot air drying was good to improve the paper properties, which resulted in low roughness, high gloss, low ink absorption and high paper surface efficiency. It could be concluded that infrared drying compared with vacuum drying and hot air drying resulted in the highest print density and better printability.

Describing the Influence of Ink Type on Ink Penetration and Distribution

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 ink type on ink absorption and characterize the penetration depth through quantitative analysis by Laser Scanning Confocal Microscope (LSCM). Fluorescent ink was used to observe and characterize ink penetration by LSCM. Three-dimensional images of ink pigment penetration were obtained by reconstructing all XY plane images. It could be concluded Common offset printing ink compared with UV offset printing resulted in deeper ink penetration ,uneven ink distribution and lower print density. Because the composition and drying method of UV offset printing ink and common offset printing ink were significant different, penetration depth and distribution uniformity of these two types of offset printing ink in coated paper were distinct.

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

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.