Reinforced glass fibre, composite of glass fibres, method for producing glass fibres and glass composition for producing glass fibres

摘要

Reinforcing glass fibres are disclosed, the composition of which comprises the following constituents within the limits defined below, 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 comprises less than 1 % of other constituents and comprises more than 0.5 % of at least one of the three components F2, B2O3 and LiO2. A composite of these glass fibres is also disclosed. At production of the glass fibres, a plurality of molten glass threads are drawn, running from a plurality of apertures disposed at the base of one or more dies, in the form of one or more webs of continuous filaments, and the filaments are then re-assembled into one or more threads which are collected on a moving support.