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US 2021/0139368 A1Published application
Glass fiber and method for producing the same
AssigneeNippon Sheet Glass Co., Ltd.
InventorsAya NAKAMURA, Hidetoshi FUKUCHI, Masanori SHOJIYA
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Abstract
A glass fiber according to the present invention is suitable for preventing filament breakage and suitable for being stably produced for a long term, and has a β-OH value of 0.02 mm−1 or more and less than 0.55 mm−1. The preferred content of SO3 is more than 0 ppm and 70 ppm or less on a mass basis. The glass fiber is preferably substantially free of As and Sb. SO3 can be supplied to a glass raw material as, for example, a sulfuric acid salt of an alkali metal or an alkaline-earth metal.
Claims25
A glass fiber having a β-OH value of 0.02 mm−1 or more and less than 0.55 mm−1.
Dependencies are inferred from the claim text.