Biologically degradable mineral fibre compsn.

摘要

The mineral fibre compsn. that is biologically degradable, comprises (wt.%): 40-67 SiO2; 20-45 CaO; 0-12 MgO; 0-10 Na2O; 0-15 B2O3; 0-25 Na2O + B2O3; 0-5 P2O5; 0-3 Al2O3; and 0-5 of each of TiO2, Fe2O3, BaO, MnO and K2O.