GLASS LENS MOLDING DIE MATERIAL

PROBLEM TO BE SOLVED: To provide a molding die material suitable as a template for glass lens molding. SOLUTION: This glass lens molding die material comprises a composite of glassy carbon and a vapor phase-grown carbon fiber. The content of the vapor phase-grown carbon fiber in the composite is not...

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Hauptverfasser: SUGIHARA KANJI, MATSUKURA TOSHIAKI, ITO HIROAKI, ENDO MORINOBU, SUGIMOTO KOICHI
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a molding die material suitable as a template for glass lens molding. SOLUTION: This glass lens molding die material comprises a composite of glassy carbon and a vapor phase-grown carbon fiber. The content of the vapor phase-grown carbon fiber in the composite is not less than 0.5 volume % but less than 3.0 volume %, and the firing temperature of the composite is 1,400-2,300°C. It is preferable that the composite is a high purification-treated one. COPYRIGHT: (C)2004,JPO&NCIPI