Glass components for glass fiber, glass fibers, glass fiber reinforced resin components and molded articles

Abstract

A glass composition for glass fibers, wherein SiO2 comprises 51.90-62.20% by mass, Al2O3 comprises 14.50-20.90% by mass, CaO comprises 3.50-15.00% by mass, MgO comprises 4.50-11.40% by mass, B2O3 comprises 0.61-2.61% by mass, Na2O comprises 1.10-6.40% by mass, K2O comprises 0-3.00% by mass, Fe2O3 comprises 0.01-1.40% by mass, P2O5 comprises 0-2.00% by mass, Li2O comprises 0-0.94% by mass, ZrO2 comprises 0-0.94% by mass, the total content of Na2O and K2O comprises 1.10-9.40% by mass, the ratio (Na2O / B2O3) comprises 0.73-7.30, and the ratio (Al2O3 / B2O3) comprises 8.00-24.00.