Nozzle for irregular cross-section glass fiber and method for manufacturing irregular cross-section glass fiber

摘要

【Theme】 To enable the production of fibers with a high flatness when producing irregular cross-section glass fibers. SOLUTION: A flat nozzle hole 6 having an inlet 6a and an outlet 6b of the molten glass 2 is provided, and the wall portion surrounding the nozzle hole 6 has a pair of short wall portions 12 facing each other in the major axis direction of the nozzle hole 6 and a minor axis. In the nozzle 8 for irregularly cross-sectional glass fiber having a pair of long wall portions 11 facing each other in the direction and for producing the irregularly cross-sectional glass fiber 2f from the molten glass 2 flowing out from the nozzle hole 6, the nozzle hole 6 is discharged. When viewed from the front from the 6b side, the average width of the bottom wall surface 12b of the short wall portion 12 is made wider than the average width of the bottom wall surface 11b of the long wall portion 11. [Selection diagram] FIG. 4