Patent ID: 6346494
Filing Date: 2002-02-12
Classification: C03C

Abstract:
A product comprising man-made vitreous fibres formed of a composition which includes, by weight of oxides,SiO232 to 48%Al2O318 to 30%CaO10 to 30%MgO2 to 20%FeO2 to 15%Na2O + K2O0 to 10%TiO20.5 to 6%Other Elements0 to 15%and the composition has a viscosity at 1400Â° C. of 10 to 70 poise, and the fibres have a dissolution rate determined from the silica concentration in solution one day and four days after shaking the fibres in Gambles solution at pH 4.5 of at least 20 nm per day.