Ocv Intellectual Capital, LLC

Douglas A Hoffmann

Peter Bernard McGinnis

A method of forming high strength glass fibers in a refractory-lined glass melter, products made there from and batch compositions suited for use in the method are disclosed. The glass composition for use in the method of the present invention is up to about 64-75 weight percent SiO, 16-24 weight percent AlO, 8-12 weight percent MgO and 0.25-3 weight percent RO, where RO equals the sum of LiO and NaO, has a fiberizing temperature less than about 2650&#xb0; F., and a &#x394;T of at least 80&#xb0; F. By using oxide-based refractory-lined furnaces the cost of production of glass fibers is substantially reduced in comparison with the cost of fibers produced using a platinum-lined melting furnace. High strength composite articles including the high strength glass fibers are also disclosed.

Method of manufacturing S-glass fibers in a direct melt operation and products formed therefrom

A method of forming high strength glass fibers in a refractory lined glass melter is disclosed. The refractory lined melter is suited to the batch compositions disclosed for the formation high modulus, and high-strength glass fibers. The glass composition for use in the method of the present invention is up to about 70.5 Weight % SiO, 24.5 weight % AlO, 22 weight % alkaline earth oxides and may include small amounts of alkali metal oxides and ZrO. Oxide based refractories included alumina, chromic oxide, silica, alumina-silica, zircon, zirconia-alumina-silica and combinations thereof. By using oxide based refractory lined furnaces the cost of production of glass fibers is substantially reduced in comparison with the cost of fibers using a platinum lined melting furnace. Fibers formed by the present invention are also disclosed.

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Hebron, OH, United States of America

Douglas A Hoffmann