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    • 8. 发明专利
    • SPINNERET FOR MODIFIED SECTION FIBER
    • JPH0578904A
    • 1993-03-30
    • JP26687891
    • 1991-09-19
    • TEIJIN LTD
    • AISAKA HIROYUKIIOHARA KOICHINAGAI HIROYUKI
    • D01D5/253D01F6/60D01F6/62
    • PURPOSE:To provide a spinneret for forming a modified section fiber, having specific structure, capable of spinning a fiber having triangular cross section in high speed and productivity, decreasing the deposition of foreign matters on the spinneret with time and effective for prolonging the pack life without varying the cross section of the fiber. CONSTITUTION:The extrusion hole of the objective spinneret has three slit holes 11 protruding from the center 15 in the form of Y. The tip 12 of each slit hole 11 has a semicircular form with radius (r). The slit holes 11 are connected near the tip parts 12 with each other with an arc curve 13 with radius (R). Each slit hole 11 is formed in a manner that the arc curve 13 is positioned inside of a line 14 connecting the tip end parts 12 of the slit holes and the curve 13 crosses a perpendicular line 16 at a point C at a distance (d) from the center 15 of the extrusion hole. The length (d) corresponds to 1/3 to 2/3 of the length (D) of the perpendicular line drawn from the center of the extrusion hole 15 to the line 14. The objective modified cross section spinneret for the melt-spinning of a fiber having triangular cross section has the above structure.