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R&D Reports

vol. 2002 - II (2002.11.30 issue)

The Development of ITO Powder for Producing Ultra High Dense Sputttering Target

Sumitomo’s ITO (In2O3-SnO2) powder is characterized by its very narrow particle size distribution, high crystallinity, and high purity. ITO powders are manufactured by co-precipitation of an aqueous mixed solution containing indium and tin with alkaline solution, followed by calcination. The resulting ITO powders have BET surface areas of 3 to 6m2/g and primary particle size of around 0.1 to 0.3μm. The mean secondary particle size (agglomerate size) is about 2-6μm. The agglomerate size can be easily reduced to about 0.6μm by milling because of loose agglomeration. In conclusion, by optimizing shaping and sintering conditions, ultra high dense sintered bodies having density of 99.5% or more can be easily obtained as low sintering temperature as 1500°C.
( 4 - 8 by Shinji FUJIWARA, Yoshiki KUROTOBI, Yoshinari SAWABE, Kunio SAEGUSA )

Development of the Resist Coating System for Color-filter Manufacturing Process

Today, market of Liquid Crystal Display (LCD) is growing rapidly, especially, in a field of application like Note PC, monitor, Flat Panel Display TV set, and PDA (Portable Data Assistant). Also further growth of LCD market is expected. To meet the market requirement, to improve productivity, and to have a flexible price decision, we had decided to construct a 5th Generation line, where more than 1m2 of glass substrate is treated. In this report, development of Capillary Coater System using capillarity of color resist, which can be applied to the 5th Generation line, is introduced.
( 9 - 14 by Rikiya MATSUMOTO, Akio SAKAI, Kazushi TAKAHASHI, Norio MURAKAMI )

Development of Polymethyl Methacrylate and its Molding Technique for Light Guides in LCD Back Light Systems

Recent developments of polymethyl methacrylate and its molding technique for light guides in LCD back light systems will be reported in this paper. Polymethyl methacrylate (PMMA) is one of key materials making up backlight systems for LCDs. For lap top computers or monitors, exceptionally transparent PMMA is used as a material for light guides in their backlight systems. On the other hand, opaque PMMA sheet that diffuses light from light sources is used for large size LCD-TVs. In this paper, our developments of materials for light guides and diffuse sheets will be outlined, then our novel molding technique that is quite suitable to mold large size light guide plates in back light system of large monitors will be described.
( 15 - 22 by Kenji MANABE, Kazuhiro YAMASAKI, Yoshiki NISHIGAKI, Tomohiro MAEKAWA )

Development of Dichroic Dyes for Liquid Crystal Displays

Dichroic Dyes have optical anisotropy character and they have become one of the key compounds for polarizing films on Liquid Crystal Display(LCD)s. We have been developping new Dichroic Dyes which show high performance, such as polarizability, stability for light and heat and so on ,in order to meet the requirements in this application. In this paper, we describe the scheme for designing dyes for polarizing films and new Dichroic Dyes for the Guest-Host LCDs. Dioxazine Dyes we have developed for the Guest-Host LCDs show the highest order parameter.
( 23 - 30 by Yutaka KAYANE, Kazuya OGINO, Yoshiteru OHTA, Toru ASHIDA,Toshihiko TANAKA )

Application Limits of Flux Cored Arc Welding to Chemical Processing Plants

High efficiency of Flux Cored Arc Welding (FCAW) extends its application to the every joint of the steel facilities and constructions due to economical benefit. Recently, some inconveniences such as low charpy impact energy, cracking in bending test of FCAW joints were experienced and a distinguished creep ductility loss for Type 304H was reported. Metallurgical examination revealed that high density of oxide inclusion in weld metal of FCAW resulted in a relatively inferior mechanical properties compared with other welding process. Welding test results are reviewed and the characteristics with application limits depended on welding conditions of FCAW are discussed.
( 31 - 41 by Takahisa HOSHIKA, Hisakazu MORI )

Development of the Novel High Performance Processing Stabilizer -Sumilizer GP-

Sumitomo Chemical successfully developed the novel high performance processing stabilizer (Sumilizer GP), which improves processing stability of polyolefins, especially polyethylene. Sumilizer GP is a first phosphite type stabilizer in the world, which has phosphite moiety and phenolic moiety to gain intramolecular synergism. The details of development and properties based on its chemical structure are introduced.
( 42 - 49 by Fumitoshi KOJIMA, Kanako FUKUDA, Kunihito MIYAKE )

Development of the PP Materials by using New Compatibilyzing Technology for Automotive Parts

For the automotive interior applications, polypropylene (PP) of a high moldability and a high impact strength has been required to achieve the global uinified material of high performances. We concluded, based on the theoretical background, that the particular micro-structure of the PP composite with finely dispersed elastomer is necessary to obtain the required performances. In order to attain this structure, stabilization of the interface between PP matrix and elastomer domain is the most siginificant, and we eventually found the specific SEBS was effective as a compatibilizer for this composite. The developed PP composite shows not only an improved mechanical properties but also the high flowability and the good appearance of the molded parts.
( 50 - 55 by Moriyasu SHIMOJO, Kenichi HIGASHI, Kenichi OHKAWA, Shinichi KONDO )

Development of an On-line Sample Enrichment System Coupled to ESI-TOFMS- Challenge to highly sensitive structural elucidation of impurities of agrochemicals and pharmaceuticals-

We developed an on-line sample enrichment system for mass spectrometry to analyze the impurities of pharmaceutical drugs or agrochemicals less than 0.1%. The system consists of conventional LC, micro LC, a parking loop, and a precolumn, which are connected through one eight-port switching valve. An analyte peak of interest detected on the conventional LC is stored with adding appropriate amount of water in the parking loop. It is directly transferred to the precolumn in order to concentrate, and then eluted from there with linear gradient and concentrated by the microcolumn. The microcolumn being combined with ESI-TOFMS, some structural information including accurate molecular weight could be obtained with pmoL amount of the analyte.
( 56 - 64 by Kazuko YAMASHITA, Masahiko OKAMOTO, Kiyoshi NAKAI )

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