glass fibers 1-8-08 - Glass Fibers Douglas J. Gardner...

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1 Glass Fibers Douglas J. Gardner Professor Wood-Polymer Hybrid Composites Glass Fiber Manufacture
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2 Glass Raw Materials • More than half the mix is silica sand, the basic building block of any glass. • Other ingredients are aluminum,calcium and magnesium oxides, and borates. • Some countries use basaltic (volcanic) glass Furnace • The temperature is so high > 1600 °C that the sand and other ingredients dissolve into molten glass. The inner walls of the furnace are lined with special "refractory" bricks that must periodically be replaced.
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Bushings • The molten glass flows to numerous high heat-resistant platinum trays which have thousands of small, precisely drilled tubular openings, called "bushings." Filaments • This thin stream of molten glass is pulled and attenuated (drawn down) to a precise diameter, then quenched or cooled by air and water to fix this diameter and create a filament. – 1. Bunker,
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This note was uploaded on 12/21/2010 for the course AEWC 430 taught by Professor Dg during the Fall '08 term at University of Maine Orono .

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glass fibers 1-8-08 - Glass Fibers Douglas J. Gardner...

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