Abstract: Glass batch compositions for the formation of high-modulus, and high-strength glass fibers as well as fibers suitable for use as textile and reinforcements are disclosed. Fibers formed of the composition are especially suitable for use in high-strength, low-weight applications such as windmill blades and high strength and modulus applications where strength and stiffness are required in the composite. The glass composition is up to about 70.5 weight % SiO2, about 24.5 weight % Al2O3, about 22 weight % alkaline earth oxides and may include small amounts of alkali metal oxides and ZrO2. Fiberglass-reinforced composite articles such as windmill blades are also disclosed.

Abstract: A low viscosity E-glass composition including SiO2 in an amount ranging from 52-54 weight percent, Al2O3 in an amount ranging from 12-14 weight percent, F2 in an amount ranging from 0-1.0 weight percent, Fe2O3 in an amount ranging from 0 to 0.8 weight percent, Na2O in an amount ranging from 0-2.0 weight percent, K2O in an amount ranging from 0-2.0 weight percent, CaO in an amount ranging from 16-23 weight percent, MgO in an amount ranging from 0-3.0 weight percent, Li2O in an amount ranging from 0-3.0, TiO2 in an amount ranging from 0-1.5 weight percent, ZnO in an amount ranging from 0-4.0 weight percent, and B2O3 in an amount ranging from 8.0-10 weight percent is provided. The glass composition has a log 3 viscosity temperature between 1750 and 2150° F. and a ?T temperature greater than 50° F.

Abstract: 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 % SiO2, 13-30 weight % Al2O3, 5-20 weight % MgO, 0-10 weight % CaO, 0 to 5 weight % R2O where R2O is the sum of Li2O, Na2O and K2O, has a higher fiberizing temperature, e.g. 2400-2900° F. (1316-1593° C.) and/or a liquidus temperature that is below the fiberizing temperature by as little as 45° F. (25° C.). Another glass composition for use in the method of the present invention is up to about 64-75 weight percent SiO2, 16-24 weight percent Al2O3, 8-12 weight percent MgO and 0.25-3 weight percent R2O, where R2O equals the sum of Li2O, Na2O and K2O, has a fiberizing temperature less than about 2650° F. (1454° C.), and a ?T of at least 80° F. (45° C.).

Abstract: A composition for the manufacture of high strength glass fibers suitable for manufacture in both precious metal lined furnaces and refractory lined glass melter is disclosed. The glass composition of the present invention includes 62-68 weight % SiO2, 22-26 weight % Al2O3, 8-15 weight % MgO and 0.1 to 3.0 weight % Li2O. One suitable composition of the present invention includes 64-66.5 weight percent SiO2, 23-24.5 weight percent Al2O3, 9-11 weight percent MgO and 0.3-0.35 weight percent Li2O. Another suitable composition includes 66.5 weight percent SiO2, 23.4 weight percent Al2O3, 9.8 weight percent MgO and 0.3 weight percent Li2O. Yet another suitable composition is about 66 weight percent SiO2, about 23 weight percent Al2O3, about 10.5 weight percent MgO and about 0.3 weight percent Li2O. Fibers formed by the present invention are also disclosed. The fibers have a fiberizing temperature of less than 2650° F., a ?T of at least 25° F.

Abstract: A method of forming high strength glass fibers in a refractory-lined glass meter, 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 SiO2, 16-24 weight percent Al2O3, 8-12 weight percent MgO and 0.25-3 weight percent R2O, where R2O equals the sum of Li2O and Na2O, has a fiberizing temperature less than about 2650° F., and a ?T of at least 80° 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.

Abstract: A low viscosity E-glass composition including SiO2 in an amount ranging from 52-54 weight percent, Al2O3 in an amount ranging from 12-14 weight percent, F2 in an amount ranging from 0-1.0 weight percent, Fe2O3 in an amount ranging from 0 to 0.8 weight percent, Na2O in an amount ranging from 0-2.0 weight percent, K2O in an amount ranging from 0-2.0 weight percent, CaO in an amount ranging from 16-23 weight percent, MgO in an amount ranging from 0-3.0 weight percent, Li2O in an amount ranging from 0-3.0, TiO2 in an amount ranging from 0-1.5 weight percent, ZnO in an amount ranging from 0-4.0 weight percent, and B2O3 in an amount ranging from 8.0-10 weight percent is provided. The glass composition has a log 3 viscosity temperature between 1750 and 2150° F. and a ?T temperature greater than 50° F.

Abstract: High temperature glass fibers suitable for use as textile and reinforcements are specifically adapted to be used in high temperature applications such as sound absorbing material in engine exhaust mufflers. The glass fibers have compositions of up to 72 Mole % SiO2, 20 mole percent Al2O3, 22 mole percent alkaline earth oxides and may include small amounts of alkali oxides and ZrO2.

Abstract: Mineral fiber compositions are disclosed which, in a first embodiment, include the following components, indicated in weight percents: about 54 to about 70 percent SiO.sub.2, about 0 to about 4 percent Al.sub.2 O.sub.3, about 0 to about 6 percent Na.sub.2 O, about 0 to about 6 percent K.sub.2 O, about 0 to about 6 percent MgO, about 10 to about 28 percent CaO, about 6 to about 17 percent total iron as FeO, and about 0 to about 5 percent TiO.sub.2, wherein the total weight percent of SiO.sub.2 and Al.sub.2 O.sub.3 ranges from about 56 percent to about 72 percent, the total weight percent of MgO and CaO ranges from about 12 percent to about 28 percent, the total weight percent of Na.sub.2 O and K.sub.2 O does not exceed 6 percent, and the total weight percent of all components, including trace elements, if any, is 100 percent. In a second embodiment, the compositions include the following components, indicated in weight percents: about 50 to about 68 percent SiO.sub.2, about 0 to about 4 percent Al.sub.2 O.sub.