Glass composition for glass fiber, glass fiber, and method for producing glass fiber
AssigneeNippon Electric Glass Co., Ltd.
InventorsShinsaku Nishida, Hiroshi Sawasato
Life of this patent
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Abstract
Provided is a glass composition for a glass fiber, which has excellent alkali resistance, acid resistance, and hydrolytic resistance, is useful as a reinforcing material for composite materials such as calcium silicate board and GRC and as a corrosion-resistant material for battery separators or the like, and has a low glass drawing temperature and liquidus temperature of the glass and thus which is excellent in productivity. The glass composition comprises, in mass % on an oxide base, 50 to 65% of SiO2, 0 to 5% of Al2O3, 0 to 10% of CaO, 10 to 20% of Li2O+Na2O+K2O, 0 to 5% of Li2O, 10 to 20% of Na2O, 0 to 5% of K2O, 5 to 10% of TiO2, and 10 to 20% of ZrO2 as a glass composition.
Claims10
A glass composition for a glass fiber comprising, in mass % on an oxide base, 50 to 65% of SiO2, 0 to 5% of Al2O3, 0 to 10% of CaO, 12 to 20% of Li2O+Na2O+K2O, 0 to 5% of Li2O, 12 to 18% of Na2O, 0 to 1.7% of K2O, 5 to 8.3% of TiO2, 16.5 to 20% of ZrO2, and wherein a total content of SiO2, Al2O3, CaO, Li2O, Na2O, K2O, TiO2, and ZrO2 is 98% or more, and wherein a difference between a drawing temperature and a liquidus temperature is 91° C. or more.
A method for producing a glass fiber comprising:
- melting a raw material batch mixed so as to be a glass comprising, in mass % on an oxide base, 50 to 65% of SiO2, 0 to 5% of Al2O3, 0 to 10% of CaO, 12 to 20% of Li2O+Na2O+K2O, 0 to 5% of Li2O, 12 to 18% of Na2O, 0 to 1.7% of K2O, 5 to 8.3% of TiO2, 16.5 to 20% of ZrO2, and wherein a total content of SiO2, Al2O3, CaO, Li2O, Na2O, K2O, TiO2, and ZrO2 is 98% or more as a glass composition, in a glass melting furnace and
- continuously drawing the molten glass from a bushing to form it into a fiber, wherein a difference between a drawing temperature and a liquidus temperature is 91° C. or more.
Dependencies are inferred from the claim text.