Abstract: According to various embodiments, a composition for preparing glass fibers comprises from about 58 wt. % to about 69 wt. % SiO2, from about 8 wt. % to about 15 wt. % RO, wherein RO is a total amount of MgO and CaO, from about 12 wt. % to about 18 wt. % R2O, wherein R2O is a total amount of Na2O and K2O, up to about 2 wt. % of a single oxidizing agent, and Fe2O3 and FeO. A ratio of Fe2+/Fe3+ is between 0.02 and 0.1. The glass composition has a log 3 viscosity of between about 911 ° C. and about 1173 ° C.

Abstract: A method for manufacturing unbonded loosefill insulation material configured for distribution in a blowing insulation machine is provided. The method includes the steps of establishing apparatus configured for making fibrous materials, the apparatus including structures configured to provide molten materials to fiberizing apparatus and collection apparatus configured to collect the formed fibrous materials, determining whether the formed fibrous material will be further processed as loosefill insulation material or other fibrous products, and formulating a composition of the molten material in response to the determination of whether the formed fibrous material will be further processed as loosefill insulation material or other fibrous products.

Abstract: A method for manufacturing unbonded loosefill insulation material configured for distribution in a blowing insulation machine is provided. The method includes the steps of establishing apparatus configured for making fibrous materials, the apparatus including structures configured to provide molten materials to fiberizing apparatus and collection apparatus configured to collect the formed fibrous materials, determining whether the formed fibrous material will be further processed as loosefill insulation material or other fibrous products, and formulating a composition of the molten material in response to the determination of whether the formed fibrous material will be further processed as loosefill insulation material or other fibrous products.

Abstract: A method for manufacturing unbonded loosefill insulation material configured for distribution in a blowing insulation machine is provided. The method includes the steps of establishing apparatus configured for making fibrous materials, the apparatus including structures configured to provide molten materials to fiberizing apparatus and collection apparatus configured to collect the formed fibrous materials, determining whether the formed fibrous material will be further processed as loosefill insulation material or other fibrous products, and formulating a composition of the molten material in response to the determination of whether the formed fibrous material will be further processed as loosefill insulation material or other fibrous products.

Abstract: An unbonded loosefill insulation material formed from a glass batch is provided. The glass batch comprises, in weight percent: 62.0-69.0% of SiO2, 0.0-4.0% of Al2O3, 7.0-12.0% of CaO, 0.0-5.0% of MgO, 3.0-14.0% of B2O3, 13.0-18.0% of Na2O and 0.0-3.0% of K2O. The unbonded loosefill insulation material is configured for distribution in a blowing insulation machine.

Abstract: An unbonded loosefill insulation material formed from a glass batch is provided. The glass batch comprises, in weight percent: 62.0-69.0% of SiO2, 0.0-4.0% of Al2O3, 7.0-12.0% of CaO, 0.0-5.0% of MgO, 3.0-14.0% of B2O3, 13.0-18.0% of Na2O and 0.0-3.0% of K2O. The unbonded loosefill insulation material is configured for distribution in a blowing insulation machine.