| 摘要 |
PCT No. PCT/FR98/01932 Sec. 371 Date Sep. 2, 1999 Sec. 102(e) Date Sep. 2, 1999 PCT Filed Sep. 10, 1998 PCT Pub. No. WO99/12858 PCT Pub. Date Mar. 18, 1999The present invention relates to reinforcing glass yarns, the composition of which comprises the following constituents within the limits defined hereinbelow, expressed in percentages by weight: - SiO2 58 to 62% - Al2O3 10 to 16% - CaO more than 18% - MgO more than 1.5% - CaO + MgO less than 28% - Na2O + K2O + Li2O less than 2% - TiO2 less than 1.5% - Fe2O3 less than 0.5% - B2O3 less than 2% - F2 less than 2% - this composition furthermore comprising less than 1% of other constituent(s) and comprising more than 0.5% of at least one of the three components F2, B2O3 and Li2O. These yarns have a composition providing an excellent compromise between its cost and its fiberizability. |
