Fire resistant glass fiber

Details Fire resistant glass fiber Fire resistant glass fiber

C - Chemistry, Metallurgy

03

C

C03C 3/087 (2006.01) C03B 37/01 (2006.01) C03C 3/083 (2006.01)

Patent

CA 2638726

A glass fiber composition comprises about 52-65 weight% SiO2; less than or equal to 4 weight% Al2O3; about 7-16 weight% Fe2O3; greater than 6 weight% and less than or equal to about 14 weight% R2O; about 6-25 weight% CaO; less than or equal to weight% MgO; and about 10-25 weight% RO; wherein R2O represents alkali metal oxides and RO represents alkaline earth metal oxides. Preferably, the glass fiber composition has a liquidus temperature of less than 2350°F; and a viscosity at a liquidus temperature of the glass fiber composition of greater than 500 poise; and fire resistant glass fiber formed from the glass fiber composition has a biodissolution rate of greater than 50 ng/cm2/hr.

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