| 摘要 |
A biodegradable mineral fiber composition, characterized by the following constituents in percent by weight: SiO2: 45 to 55; Al2O3: 0 to less than 4; Fe2O3: more than 7 to 15; CaO: 18 to 35; MgO: 5 to 15; Na2O+K2O: 0 to 10; P2O5: 0 to 5; impurities: 0 to 2. |
