FIELD: chemistry.
SUBSTANCE: versions of the present invention relate to glass compositions, glass fibres moulded from such compositions and intended for the production of composites and fibreglass. In one version, the glass composition includes, wt %: 58-62 SiO2. 14-17 Al2O3, 14-17 Al2O3, 14-17.5 CaO and 6-9 MgO, where the amount of Na2O is 0.09 wt % or less, as well as, at least, one rare earth oxide in an amount of 0.1-0.3 wt %. The glass composition is substantially free of B2O3.
EFFECT: improving the mechanical properties of fibres.
22 cl, 2 tbl, 22 ex
