| 摘要 |
The subject of the invention is a mineral wool, the glass fibres of which have a chemical composition substantially free of boron oxide and comprising the following constituents in the limits defined below, expressed in percentages by weight: 60 to 75 SiO; 0 to 4 AlO; from > 20 to 22 NaO; 5 to 15 CaO; 0 to 2 FeO; 0 to 3 PO. |
