Glass composition for glass fiber, glass fiber, glass fiber woven fabric, and glass fiber reinforced resin composition

Abstract

To provide a glass composition for glass fiber that includes biosolubility, can achieve long fiber formation, and can provide a glass filament with sufficiently high strength even when exposed to water and a high temperature and high humidity environment. The glass composition for glass fiber of the present invention includes 35.00 to 50.00% by mass of SiO2, 12.00 to 28.00% by mass of Al2O3, 10.00 to 25.00% by mass of B2O3, 2.00 to 18.00% by mass of MgO, and 5.00 to 25.00% by mass of CaO, with respect to the total amount, and the total content of MgO and CaO is 17.09 to 30.00% by mass and MgO/CaO is 0.29 to 1.92.

Dependencies are inferred from the claim text.