| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive spinneret for a sea-island type conjugate fiber, capable of stably separating and dispersing an island-component polymer into a multi-threaded state in a sea-component polymer, and capable of allowing the fiber to be industrially mass-produced. SOLUTION: This spinneret usable to spin a sea-island type conjugate fiber and having a tubular body 3 group forming the flow paths of an island- component polymer, and arranged like the concentric circles or the concentricity polygons, and a distribution flow path groove 6 penetrated by the tubular body 3 group, and supplying a sea-component polymer while surrounding the tubular body 3 group from the outer periphery side part of the tubular body 3 group to the inside part, in which the lower ends of the tubular body 3 group are protruded downward from the lower end of the distribution flow path groove 6, and are obtained by successively shortening the projecting lengths La to Lc measured from the lower end of distribution flow path groove 6 of each tubular body, from the most outer periphery side row to the most inner side row to provide the spinneret for the sea island type conjugate fiber.
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