| 摘要 |
The invention concerns reinforcing glass fibres whereof the composition comprises the following constituents, within the limits defined as follows expressed in weight percentages: 58 to 62 % SiO2, 10 to 16 % Al2O3, more than 18 % CaO, more than 1.5 % MgO, less than 28 % CaO + MgO, less than 2 % Na2O + K2O + Li2O, less than 1.5 % TiO2, less than 0.5 % Fe2O3, less than 2 % B2O3, less than 2 % F2; said composition further comprising 1 % of other constituent(s) and comprising more than 0.5 % of at least three F2, B2O3, Li2O constituents. Said glass fibres have a composition providing excellent compromise between its cost and its fibre drawing capability.
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