| 摘要 |
<p>The present invention relates to a glass composition resistant to chemical media for the production of reinforcing yarns, said glass comprising the following constituents with the limits defined below, expressed in mol%: 67-72% SiO2; 5-9.5%, preferably > 7.5%, ZrO2; 11-17% R2O (R = Na, K and Li); 0-5.5% Li2O; 0-5.5% K2O; < 10% Na2O; and 3-9% CaO, the composition furthermore containing less 1% of impurities (AI2O3, Fe2O3, Cr2O3, TiO2, MgO, SrO, BaO and P2O5) and being free of F. The invention also relates to the glass yarns obtained from this composition and to composites based on an organic or inorganic material containing such yarns.</p> |
