| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved wet type spinneret so that it becomes possible to produce preferably fine-denier triangular cross-section acrylic fiber with excellent spinning stability and productivity.SOLUTION: Provided is a spinneret for wet spinning acrylonitrile-based polymer, more specifically a wet type spinneret for triangular cross-section acrylic fiber, where a length of a side of a nozzle hole is 0.060 to 0.080 mm and a length of a discharge hole is 0.04 to 0.15 mm. The wet type spinneret is used for wet-spinning a spinning dope having a polymer concentration of 18 to 26 mass%, the polymer being an acrylonitrile-based polymer containing acrylonitrile in an amount of 80 mass% or more.SELECTED DRAWING: None |
