| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite spinneret that can increase hole packing density of an island polymer extruding hole, as well as prevents each ultra fine fiber of an island component from forming a bundle shape to obtain a composite fiber, even though the diameter of the island component as obtained after sea component elimination is extremely small.SOLUTION: A composite spinneret comprises at least one dispensing plate in which a dispensing hole and a dispensing groove are formed, and a lowest layer dispensing plate in which an island component extruding hole and a sea component extruding hole are formed. The composite spinneret further comprises an island component extruding hole X extruding one type of island component polymer among two or more different types of island component polymers and an island component extruding hole Y extruding a different type of island component polymer. A phase angle of the island component extruding holes between n of the island component extruding holes Y evenly positioned on a virtual circumferential line C1 of a radius R1 against any island component extruding hole X as a center and m of the island component extruding holes X evenly positioned on a virtual circumferential line C2 of a radius R2 complies with an appropriate condition, and the sea component extruding hole is positioned on a virtual circumferential line C3 of a radius R3 with an appropriate condition. |
