| 摘要 |
PROBLEM TO BE SOLVED: To suppress occurrence and deposition of stain at the circumference of nozzle holes of a spinneret as a spinneret for conjugate spinning, to stabilize a spinning production process and qualities of yarn. SOLUTION: This spinneret is used for melt spinning for a conjugate yarn comprising a polyester as one component and another component exposed to the surface of a fiber. The spinneret has a polymer introduction flow channel A, a cylindrical flow channel B, a conic flow channel C extending from the end of the cylindrical flow channel B in the direction of a polymer flow and a cylindrical flow channel E elongating from the end of the conic flow channel C to a nozzle hole. The flow channels satisfy the following equations: 2d<=L<=4d, 2.0d<=D<=3.0d and 0.25<=tanθ<=1.00 [(d) is the diameter of the flow channel B; D is the longest diameter of the flow channel C; L is total length of the flow channel C and the flow channel E; andθis an extending angle from the direction of the central shaft of the flow channel].
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