プラスチック射出成形におけるマイクロフローマークの発生に及ぼす成形条件の影響

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書誌事項

タイトル別名
  • Influence of Molding Conditions on the Formation of Microscopic Flow Marks on the Surface of Injection-Molded Parts.
  • プラスチック シャシュツ セイケイ ニ オケル マイクロ フロー マーク ノ

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説明

In order to analyze the mechanism of the transcription in injection molding, the relationship between the molding conditions and the microscopic flow marks formed on the surface of molded parts of polycarbonate resin has been studied. The results obtained are as follows. (1) When the melt temperature, mold temperature and injecting velocity are low, microscopic flow marks more than 5 nm deep are formed on the surface of the injection-molded parts, and the molding transcription drops. (2) Such flow marks are caused by the cooling of melt resin at the melt front. That is, they are formed in the case that the temperature of the resin near the wall of the mold cooled to the no-flow temperature before that resin contacted the wall of the mold. (3) If those flow marks are eliminated, the molding transcription improves; then the surface roughness of the substrate of 3.2nm in Rmax is nearly equal to that of the stamper of 2.7nm in Rmax.

収録刊行物

  • 高分子論文集

    高分子論文集 49 (3), 241-248, 1992

    公益社団法人 高分子学会

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