Advanced Materials Research Vols. 881-883

Abstract: The surface of magnesium hydroxide (MH) was modified with a silane coupling agent A-174 (3-methacryloxypropyltrimethoxysilane) to improve MH dispersion and hydrophobicity. The effects of modification on the resultant product and the mechanisms involved were studied through activation index analysis, thermogravimetric analysis, Fourier transform infrared spectroscopy and scanning electron microscope. The optimum modification conditions were obtained as follows: an A-174 dosage of 1.5 wt.% at 145 °C for 10 min at a stirring rate of 3000 rpm. A chemical reaction was observed between the MH surfaces and A-174. The dispersion and hydrophobicity of MH remarkably improved after surface modification.

Abstract: nanoTiO2 is one of the most important inorganic pigments in many different fields. The effect of sinter and thermoprint on film-forming properties of nanoTiO2 in screen printing were studied in this paper. Compared with sintering, Thermoprint uses high temperature and pressure to make nanoparticles more tight. By scanning electron microscopy (SEM), X-ray diffraction (XRD) and Coating Adhesion Test, the better film-formation properties of thermoprint are demonstrated.

Abstract: Due to increase refined lead production and slow industrialization of lead-free solders, hazard of lead to human and environment still existed. Based on pollutions of lead depending on the volatility and the solubility of lead, the new ways to prevent and reduce the pollution of lead were put forward. The lead content in lead-solders could be reduced appropriately and the dense surface film could be formed by micro-alloying in the view of material for reducing the pollution. Low soldering temperature and the optimal soldering process or equipment could also be taken to reduce the pollution of lead.

Abstract: 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.

Abstract: Four kinds of thermal transfer paper with different paper characteristics were chosen, main properties including absorbability, air permeability, roughness, whiteness, formation and ash content were tested. Same ink color pieces were printed on these samples through colour printer, then these ink color pieces were transferred onto the same fabric based on the magnetic heat press machine, contrasting color transfer rate, gloss, adhesion and other indicators, the general law of paper performance on transfer quality was discussed. Research shows absorbability, roughness and air permeability will directly affect the quality of thermal transfer quality. Lower roughness and absorbability as well as moderate permeability have a significant role to improve the heat transfer quality. The result offers a certain theoretical reference and practical guidance to the selection, research and development of thermal transfer paper.

Abstract: Abstract.The connection mode of reducer with straight tube on both sides are the welding connection. There are two weld at the both side of reducer and there has a great influence on residual stress and deformation in the process of welding . Based on the particularity of reducer welding, the paper is focus on the residual stress and deformation in the process of welding, using large-scale finite element analysis software ANSYS .The DN500X450 reducer model is established.The welding temperature field and residual stress field is analysis and calculation and analysis the influence on temperature and stress distribution of reducer. The results show that the maximum of the temperature and the residual stress is located in the big side and reduce the welding seam, and the obvious deformation also find in the big side and reduce joint . The reducing pipe’s distribution of temperature field and residual stress field are obtained,providing the basis to establish properly and optimize of welding process.

Abstract: 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.

Abstract: The optimization parison thickness can reduce the oil drum weight and meet the requirement of the minimum thickness. The profile thickness of the extruded parison can be optimized by simulation. Under different blowing pressures, extrusion blow molding non-isothermal process of the high density polyethylene oil drum with a handle was simulated by using Polyflow. The initial parison was respectively divided into 11, 51, 101 and infinite segments. After seven optimizations, the oil drum wall thickness was equal or larger than 2 mm. An appropriate inflation pressure of 0.6 MPa was obtained. The results show that the production efficiency increases with the inflation pressure increasing. With the parison segments increasing, the oil drum thickness distribution inflated from the optimized parison is more uniform and approaches to the required thickness. The oil drum mass is decreased with the segments increasing. It is necessary that the non-uniform thickness parison was produced by injection molding.

Abstract: 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.

Abstract: By method of TIG, two kinds of welding materials were filled in, under certain welding craft conditions，1Cr18Ni9Ti and 2Cr13 were welded. By OM(ZEISS)、SEM，the microstructure of two kinds of 2Cr13 and 1Cr18Ni9Ti welding joints were observed and analyzed, by electronic universal tensile machine，mechanical properties of welding joints were measured. The results show that 2Cr13 and 1Cr18Ni9Ti welded joints is typical columnar crystal, the microstructure is lath martensite +residual austenite + carbide，the welding joints filled in two kinds of materials， rupture forms are toughness rupture; Elongation and tensile strength of welding joint filled in 308 welding material is better than that filled in H1Cr21Ni10Mn7Mo welding wire.