초록 ▼

Glass fibers having the following constituents in the ranges of proportions indicated: SiO2, 57-70 wt. %; Al2O3, 2-7 wt. %; CaO, 5-10 wt. %; MgO, 0-4 wt. %; B2O3, 0-4.5 wt. %; and F, 0.5-4 wt. %; and wherein B2O3 and F are present in amounts according to the relationship: 3≤B2O3+1.5 F≤6.5 and wherei

Glass fibers having the following constituents in the ranges of proportions indicated: SiO2, 57-70 wt. %; Al2O3, 2-7 wt. %; CaO, 5-10 wt. %; MgO, 0-4 wt. %; B2O3, 0-4.5 wt. %; and F, 0.5-4 wt. %; and wherein B2O3 and F are present in amounts according to the relationship: 3≤B2O3+1.5 F≤6.5 and wherein the fibers also contain the alkali oxides Na2O and K2O, in amounts according to the relationship: 16 wt. %2O+K2O<20 wt. %. The glass fibers are used advantageously in thermal and/or acoustic insulation.

대표청구항 ▼

Glass fibers consisting essentially of the following proportions of constituents: SiO2, 57 to 70 wt.%, Al2O3, 2 to 7 wt.%, CaO, 5 to 10 wt.%, MgO, 0 to 4.0 wt.%, Na2O, 14 to 17 wt.%, K2O, 0.5 to 3.5 wt.%, B2O3, 0 to 4.5 wt.%, and F, 0.5 to 4 wt.%, wherein the alkaline oxides are in proportions: 16 w

Glass fibers consisting essentially of the following proportions of constituents: SiO2, 57 to 70 wt.%, Al2O3, 2 to 7 wt.%, CaO, 5 to 10 wt.%, MgO, 0 to 4.0 wt.%, Na2O, 14 to 17 wt.%, K2O, 0.5 to 3.5 wt.%, B2O3, 0 to 4.5 wt.%, and F, 0.5 to 4 wt.%, wherein the alkaline oxides are in proportions: 16 wt.%2O+K2Owt.% and wherein wt.% B2O3 and 1.5×wt. % fluorine content is in accordance with: 3≤B2O+1.5F≤6.5, wherein said fibers have an upper devitrification temperature of below 980°C. and the temperature corresponding to the zero devitrification rate is less than 920°C.