| 摘要 |
PROBLEM TO BE SOLVED: To provide a nozzle tip designed to have a molten glass pool above the orifice hole provided at the bottom and having the ratio of the major axis to minor axis of a specified value or greater so as to efficiently produce glass fiber with modified cross section of high flatness ratio. SOLUTION: This nozzle tip 1 has such a design that, the bottom face thereof is provided with an orifice hole 2 of rectangular or ellipsoidal shape or of shape approximate thereto for the purpose of affording modified cross-section glass fiber with a flatness ratio of as high as >=2.0, the ratio of the major axis to minor axis for the orifice hole is set at (1:2.5) or greater; above the orifice hole 2, there is furnished a molten glass pool 3 in order to stabilize molten glass flow and the flat shape of the aimed glass fiber, and the cross-section area of the pool is pref. 1.5-8 times the area of the orifice hole 2 and the depth of the pool pref. 2-6 mm; and it is preferable that the projected height from the lower surface of the nozzle plate of this nozzle tip 1 is set at pref. 3-6 mm.
|
