SYNTHETIC PARTING MATERIAL FOR SHAPING GLASS SHEET DOUBLETS

SYNTHETIC PARTING MATERIAL FOR SHAPING GLASS SHEET DOUBLETS

The number of bent laminated glass windshields having bull's-eyes that adversely affect its optical properties is reduced by using amorphous precipitated silica particles such as is used as flatting agents for paints, as a parting material between a pair of glass sheets during bending. The part...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MARTINO, PAMELA L, KADUNCE, RANDY R, BUSH, PAUL W
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
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Beschreibung
Zusammenfassung:The number of bent laminated glass windshields having bull's-eyes that adversely affect its optical properties is reduced by using amorphous precipitated silica particles such as is used as flatting agents for paints, as a parting material between a pair of glass sheets during bending. The particles form relatively soft agglomerates that are milled and classified to produce a narrow distribution of particle sizes as compared to the distribution found in untreated silica, such as diatomaceous earths previously used as a parting material.