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Irregularly-shaped glass fibers and insulation therefrom comprising two different glasses having differing coefficients of thermal expansion. The irregularly-shaped dual-glass fibers exhibit a substantially uniform volume filling nature, and provide improved recovery and thermal conductivity abiliti

Irregularly-shaped glass fibers and insulation therefrom comprising two different glasses having differing coefficients of thermal expansion. The irregularly-shaped dual-glass fibers exhibit a substantially uniform volume filling nature, and provide improved recovery and thermal conductivity abilities even in the absence of a binder material.

대표청구항 ▼

Irregularly-shaped glass fibers suitable for insulation, each glass fiber comprising two distinct glasses, each glass having a different coefficient of thermal expansion, wherein the coefficients of thermal expansion differ by at least 2.0 ppm/°C., each glass having a different glass composition and

Irregularly-shaped glass fibers suitable for insulation, each glass fiber comprising two distinct glasses, each glass having a different coefficient of thermal expansion, wherein the coefficients of thermal expansion differ by at least 2.0 ppm/°C., each glass having a different glass composition and each glass composition being boron-free, wherein the first boron-free glass composition consists essentially of: ________________________________ - Ingredients Weight Percent ________________________________ SiO2 35-65 Al2O3 0-17 MgO 0-30 CaO 5-40 FeO 0-17 Na2O +K2O 0-10 SiO2 +Al2O3 ≥45 ≤70 Temperature for a >2,350°F. Viscosity of 10 Poise 50°F. below the 10 poise viscosity temperature; and the second boron-free glass composition consists essentially of: ________________________________ - Ingredients Weight Percent ________________________________ SiO2 35-65 Al2O3 0-17 MgO 0-30 CaO 5-40 FeO 0-17 Na2O +K2O 0-25 SiO2 +Al2O3 ≥45 ≤70 Temperature for a >2,350°F. Viscosity of 10 Poise 50°F. below the 10 poise viscosity temperature.