成形加工
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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12 巻, 5 号
選択された号の論文の15件中1～15を表示しています
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目次
巻頭言
解説 : 特集　導電・絶縁材料
講座
会議・見本市だより
日本の大学・試験・研究機関の研究 : 84
製品・技術紹介
技術報告
論文
  • 薄肉空間内を流動する樹脂の毛管流れ解析に関する研究
    西村 哲郎, 益永 孝幸
    2000 年 12 巻 5 号 p. 278-286
    発行日: 2000/05/20
    公開日: 2009/11/18
    DOIhttps://doi.org/10.4325/seikeikakou.12.278
    ジャーナル フリー
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    Polymer processing technology is expected to obtain very thin components such as semiconductor packages. The thickness is needed to be less than 100×10-6m. However, in order to fill polymer melts into the very thin cavity, large scaled pressure units are necessary, in general.
    Recently, the processing methods utilizing capillary pressure of viscosity fluid are being watched with keen interest. Because, it is possible to obtain thin shapes without large scaled equipments, and contribute to reduction of manufacturing costs. So, characteristics of capillary flow were investigated for optimization of thickness design and material properties.
    As a fundamental approach, specified liquid epoxy resins and heating temperatures are selected as the flowing polymer can be regarded as non-compressible isothermal Newtonian fluid. And polymer flow was analyzed by FEM (Finite Element Method). The real behaviors of polymer flow were visualized experimentally.
    And the characteristics of capillary flows are explained, based on the analyses and visualizations. Furthermore, a roundabout flow characterized by capillary behaviors was pursued, and a method to shorten processing time was proposed, utilizing the roundabout flow.
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  • SEBSの引張強さがPPS/SEBSアロイのタフネスに及ぼす効果
    久松 徳郎, 中野 哲, 足立 朋史, 清水 恒明, 石川 優, 岩倉 賢次
    2000 年 12 巻 5 号 p. 287-291
    発行日: 2000/05/20
    公開日: 2009/11/18
    DOIhttps://doi.org/10.4325/seikeikakou.12.287
    ジャーナル フリー
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    The effects of the strength and content of elastomer on the toughness of PPS/SEBS blends were observed experimentally. Evaluation of mechanical properties and morphological analysis were performed for polymer blends containing SEBS of 5 different strengths at 3 levels of content. We observed that an increase in the amount of SEBS at a constant tensile strength caused an increase in the density of voids, while a reduction of the strength of the SEBS at a fixed SEBS content caused an increase in the void zone size. Both processes increased the toughness of PPS/SEBS blends efficiently because the presence of voids caused a relaxation of stress concentration due to the release of strain constraint.
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