GLASS FIBRE COMPOSITIONS

摘要

The invention relates to glass fibres having a chemical composition that contains the following constituents in the limits defined hereafter and expressed in percentage by weight, namely: 38 to 49 SiO₂; 15 to 25 Al₂O₃; 1 to 15 CaO; 0 to 4 MgO; 14 to 25 Na₂O; 0 to 10 K₂O; 0 to 8 B₂O₃; 0 to 3 Fe₂O₃; and 0 to 3 P₂O₅.