Method of manufacturing glass fiber
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAtsushi Nishino, Yasuo Mizuno, Masaki Ikeda
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Abstract
A method of manufacturing a polygonal glass fiber is disclosed. According to an embodiment of the present invention, a glass in a melted state is poured into a dividable polygonal slit having a cross section 5 to 20 times larger than a finally required cross section of a glass fiber to be made, and the glass poured into the slit is drawn so as to make a polygonal glass fiber. According to another embodiment of the present invention, a glass in a melted state is passed through a twin roller having a required cross section so as to make a polygonal glass fiber.
Claims10
A method of manufacturing a glass fiber, comprising the steps of:
- (a) pouring melted glass into a slit defined by two halves of a dividable mold, the slit having a polygonal cross-sectional shape of a thickness 5 to 20 times larger than a finally required thickness of the glass fiber;
- (b) cooling the glass poured into the polygonal slit;
- (c) removing said dividable mold from said glass to obtain a preform having said polygonal cross-sectional shape;
- (d) drawing said preform with said preform being heated to a temperature 100.degree. to 150.degree. C. higher than a softening point of said glass so as to obtain a glass fiber having said polygonal cross-sectional shape;
- and
- (e) cooling said glass fiber having said polygonal cross-sectional shape.
Dependencies are inferred from the claim text.