abstract |
Products comprising man-made vitreous fibres are formed of a composition which contains, by weight of oxides, 45 - 60 % SiO2, 0.5 - 4 % Al2O3, 0.1 - 4 % TiO2, 5 - 12 % FeO, 10 - 25 % CaO, 8 - 18 MgO, up to 2.5 % Na2O, up to 2 % K2O, 3 - 10 % P2O5, and up to 10 % other oxides. |