Reinforcing glass wires of a given composition for reinforcing organic and/or inorganic textile materials and more particular in the fabrication of printed circuit supports

摘要

A reinforcing glass wire has the following composition (by wt %): (a) SiO 2 : 50 - 60, preferably SiO 2 >= 52 and/or SiO 2 = 57; (b) Al 2O 3 : 10 - 19, preferably Al 2O 3 >= 13 and/or Al 2O 3 = 17; (c) B 2O 3 : 16 - 25; (d) ZrO 2 : 0.5 - 1.5; (e) Na 2O : = 1.5, preferably Na 2O = 0.8; (f) K 2O = 1.5, preferably K 2O = 0.8; (g) R 2O = 2, preferably R 2O = 1; (h) CaO = 10; (i) MgO = 10; (j) F : 0 - 2; (k) TiO 2 : 0 - 3; (l) RO : 4 - 15, preferably RO >= 6 and/or RO = 10; (m) Others = 3; (n) where R 2O = Na 2O + K 2O + Li 2O and RO = CaO + MgO. Independent claims are also included for: (a) a method for the fabrication of these glass wires; (b) the composition of the glass.