Ocv Intellectual Capital, LLC

Owens Corning Fiberglas Technology, Inc.

John W Wingert

Peter Bernard McGinnis

Douglas Alan Hofmann

David J Baker

Byron Bemis

Anne Berthereau

Walter L Eastes

Douglas A Hofmann

David Baker

Douglas Hoffman

Peter Mcginnis

A method of forming high strength glass fibers in a glass melter substantially free of platinum or other noble metal materials, products made there from and batch compositions suited for use in the method are disclosed. One glass composition for use in the present invention includes 50-75 weight % SiO, 13-30 weight % AlO, 5-20 weight % MgO, 0-10 weight % CaO, 0 to 5 weight % RO where RO is the sum of LiO, NaO and KO, has a higher fiberizing temperature, e.g. 2400-2900&#xb0; F. (1316-1593&#xb0; C.) and/or a liquidus temperature that is below the fiberizing temperature by as little as 45&#xb0; F. (25&#xb0; C.). Another 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, NaO and KO, has a fiberizing temperature less than about 2650&#xb0; F. (1454&#xb0; C.), and a &#x394;T of at least 80&#xb0; F. (45&#xb0; C.). A forehearth for transporting molten glass from the glass melter to a forming position is disclosed. By using furnaces and/or forehearths substantially free of platinum or other noble metal materials, the cost of production of glass fibers is significantly reduced in comparison with the cost of fibers produced using a melting furnace lined with noble metal materials. High strength composite articles including the high strength glass fibers are also disclosed.

Method of manufacturing high strength glass fibers in a direct melt operation and products formed there from

A method of forming high strength glass fibers in a continuous system is provided. The method includes supplying a glass batch to a glass melting furnace lined with a material substantially free of noble metals. The glass batch comprises about 50-about 75 weight percent SiO, about 15-about 30 weight percent Al2O3, about 5-about 20 weight percent MgO, about 0-about 10 weight percent CaO, about 0.25-about 5 weigh percent RO. The method further includes melting the glass batch in the furnace and forming a pool of molten glass in contact with the furnace glass contact surface, transporting the molten glass from the furnace to the bushing using a forehearth that is at least partially lined with a material substantially free of noble metal materials, discharging the molten glass from the forehearth into the bushing; and forming the molten glass into continuous fibers.

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

An R-glass composition including SiOin an amount from 59.0 to 64.5% by weight, AlOin an amount from 14.5 to 20.5% by weight, CaO in an amount from 11.0 to 16.0% by weight, MgO in an amount from 5.5 to 11.5% by weight, Na2O in N an amount from 0.0 to 4.0% by weight, TiOin an amount from 0.0 to 2.0% by weight, FeOin an amount from 0.0 to 1.0% by weight, BOin an amount from 0.0 to about 3.0% by weight, KO, FeO, ZrO, and Fluorine, each of which is present in an amount from 0.0 to about 1.0% by weight, and SrO and ZnO, each of which is present in an amount from 0.0 to about 2.0% by weight. In exemplary embodiments, the glass composition does not contain lithium or boron.

Modulus, lithium free glass

Boron-free glass fibers

Growing community of inventors

Granville, OH, United States of America

John W Wingert