| 摘要 |
A biologically degradable mineral-fiber composition characterized by the following constituents in percent by weight: SiO2: 40 to less than 52; Al2O3: less than 4; CaO: more than 25 and up to 45; MgO: 5 to 15; BaO: 0 to 7; Na2O: 2 to 12; K2O: 0 to 10; Na2O + K2O: 2 to 15; TiO2, Fe2O3, MnO: 0 to 5. |
