| 摘要 |
The invention relates to a glass yarn having a chemical composition which is essentially free of boron oxide and includes the following constituents within the limits defined below and expressed in percentage by weight, namely: 55 to 65 SiO, 9 to 16 AlO, 15 to 26 CaO, 1 to 5 MgO, 0.5 to 5 BaO+SrO, 0 to 2 NaO+KO+LiO, 0 to 1 TiO, 0 to 2 ZnO, and 0 to 2 ZrO. The invention also relates to composites containing said yarns. |
