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Volume 85, Issue 3
Displaying 1-6 of 6 articles from this issue
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Original Research Paper
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Hideki SAKAI, Akira SATO, Masamitsu NAGAHAMA, Masahiko ABE2012 Volume 85 Issue 3 Pages 98-101
Published: March 20, 2012
Released on J-STAGE: July 09, 2012
JOURNAL FREE ACCESSPolyethylene (PE, an olefinic polymer) films were prepared with added superfine particles (liposomes: diameter ca. 200 nm) and the effect of added liposomes was examined on the film properties. When added liposmes contained porous sodium aluminosilicate as a CO2-absorbing nucleus substance and sodium 2,2'-methylene-bis-(4,6-di-tert-butylphenyl) phosphate as an enhancer of PE crystal nucleus formation, the mechanical strength of prepared PE films was found to be improved due to an incresed degree of crystallization. In addition, the amount of CO2 generated in combustion tests that simulate combustion in incinerator was about 60% less for the PE films containing liposomes than for those with no liposome.View full abstractDownload PDF (826K) -
Hideki SAKAI, Akira SATO, Masamitsu NAGAHAMA, Masahiko ABE2012 Volume 85 Issue 3 Pages 102-107
Published: March 20, 2012
Released on J-STAGE: July 09, 2012
JOURNAL FREE ACCESSIn our previous paper1) we have shown that the amount of CO2 produced by combustion of polyethylene (PE) is able to be reduced by the addition of a nucleus material such as sodium aluminosilicate. In the present study the effect of addition of zinc oxide and starch on the properties of the PE film was studied. When liposomes containing zinc oxide nanoparticles as a nucleus substance were kneaded and mixed, a transparent PE film which can absorb UV light of wavelength below 400 nm and with high mechanical strength was successfully obtained. The mechanical strength could be maintained even when liposomes encapsulating starch and magnesium 12-hydroxystearate (compatibilizer of PE) as nucleus materials were used. By combining the results obtained in the present and previous works, it is shown to be important that the nucleus materials encapsulated in the liposomes are in a kneaded state in order to obtain high quality PE films.View full abstractDownload PDF (1300K)
Current Topics
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Hirofumi KANOH2012 Volume 85 Issue 3 Pages 108-112
Published: March 20, 2012
Released on J-STAGE: July 09, 2012
JOURNAL FREE ACCESSThe rigid and linear ligand, 4,4'-bipyridine (bpy) is one of the simplest ligands for the construction of PCPs / MOFs. The square grid structure constructed with bpy is one of the most fundamental motifs of the PCPs / MOFs structure. The two dimenional square-grid layer stacking (2DSG) PCPs / MOFs with appropriate metal cations and counter anions only show structural transformation with the gate gas adsorption phenomena and such special 2DSG-PCPs / MOFs are called “elastic layer-structured metal-organic frameworks (ELMs)”.
Since the gate profile can put the desorption pressure close to adsorption pressure, these unique phenomena can make it possible to overcome the dilemma of strong adsorption and easy desorption, which is one of the ideal properties for a practical adsorbent. The fact that such a unique property can be achieved through the simple 2DSG-structure and the gate property can be regulated by changing the metal cation and counter ion while retaining the fundamental structure, is attractive from both academic and industrial perspectives.Fig. 2 Fullsize ImageView full abstractDownload PDF (2445K)
Serial Lecture
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Hideo HATA2012 Volume 85 Issue 3 Pages 113-116
Published: March 20, 2012
Released on J-STAGE: July 09, 2012
JOURNAL FREE ACCESSIt is said that clay minerals can be used for thousands of applications. Actually, clay minerals have been utilized for various purposes through the ages. Clay minerals are now recognized as key necessary functional materials by various industries. Here, the author introduces an overview of clay minerals including their nature and structure. Some applications utilizing clay minerals for cosmetics are also introduced.View full abstractDownload PDF (1318K)
Serial Lecture
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Yasushi SANO2012 Volume 85 Issue 3 Pages 117-121
Published: March 20, 2012
Released on J-STAGE: July 09, 2012
JOURNAL FREE ACCESSAfter improving the quality of the printing plate in any printing methods, the ink and paste printability followed them and printing techniques have improved the performance. The quality of screen mask as printing plate of screen printing is determined by the screen mesh.
A stainless steel mesh has been used in the electronics field for over 50 years. Both of performance, higher mesh count and higher strength have improved the quality of the screen mask.
Weaving three-times stronger stainless steel wire densely, getting 40% open area rate mesh that Is optimal for fine line printing. The screen mask is named “no distortion screen mask”.
“No distortion Screen mask” that is stretch with higher tension have solved the previous screen printing problems such as “snap-off” and “distortion”.
From now on, number of high viscoelasticity paste that optimized for “no distortion screen mask” will be developed in the electronics field. And it is expected that any company can use the high quality screen printing techniques as standard process in the electronics field.View full abstractDownload PDF (1468K)
Serial Lecture
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Nobuyoshi MORITA2012 Volume 85 Issue 3 Pages 122-129
Published: March 20, 2012
Released on J-STAGE: July 09, 2012
JOURNAL FREE ACCESSPaint can be converted to small particles through deformation and breakup in the case of spray coating. Sonic air flow causes the deformation and the breakup of the paint in the case of air spray coating, and the atmospheric air causes them in the case of airless spray coating, the low volume air flow causes them in the case of air assisted airless spray coating. After the paint is deformed to many long thin ligaments, they are broken up. In this process, the higher viscosity of the paint causes the longer ligaments. The mottled finishing surface with metallic paint coating is caused by partially lower viscosity area of wet paint film. The most important factor to get higher finishing quality is to justify the viscosity of wet paint particle on the substrate.View full abstractDownload PDF (1862K)
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