Glass composition, cotton-like glass fiber, composite forming material, molded product, and method for producing cotton-like glass fiber

摘要

It aims at providing the glass composition suitable for manufacture of the cotton-like glass fiber by a centrifugal method. SiO2: 45-65% by weight Al2O3: 5-20% by weight B2O3: 5-18% by weight R2O: 1-7% by weight RO: 5-23% by weight Inevitable mixture: containing less than 1% by weight of components Is at least one selected from Li2O, Na2O, and K2O, and the RO is at least one selected from CaO, MgO, BaO, ZnO, and SrO, and corresponds to a viscosity of 1000 poise. The problem can be solved by a glass composition having a temperature of 1150 ° C. or lower and a liquidus temperature of 100 ° C. or lower than the temperature corresponding to 1000 poise.