Long glass fiber manufacturing method, and long glass fiber
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United States of America
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Oct 8, 2024
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app pub date -
Oct 4, 2022
filing date -
Oct 4, 2022
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Abstract
A method for manufacturing glass long fiber using recovered glass fiber, capable of manufacturing glass long fiber in which a recycle rate is increased, increase of a liquid phase temperature of molten glass and narrowing of an operating temperature range of the molten glass are suppressed, and a spinning temperature is low. The method includes a glass melting step of melting a glass raw material containing glass fiber recovered from a glass fiber-reinforced resin molded product, and a glass fiber mineral material to obtain molten glass; and a spinning step of spinning the molten glass to obtain glass long fiber, and a content of the recovered glass fiber in the glass raw material is in the range of 11 to 75% by mass, and differences in the contents of SiO2, Al2O3, B2O3, and CaO between the glass fiber mineral material and the recovered glass fiber satisfy a prescribed relationship.
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