| 摘要 |
PURPOSE:A spinneret capable of spinning filmy yarn having uniformity along the whole length, obtained by making dent or protrusion parts which are in parallel with a spinning hole and have the same length at both the sides in the longer direction of the slit spinning hole which is to be made on the spinneret. CONSTITUTION:The dent parts 9 which are approximately parallel with the spinning hole 1 and have almost the same length as that of the hole are made at corresponding positions at both the sides in the longer direction of the thin and long slit spinning hole 1 having a flat shape which are to be made on the spinneret 2'. When the extrusion hole 7 are bored through on the bottom of the introduction hole 5 constituting the spinneret 1, the opening width of the extrusion hole 7 is made uniform along the whole length, to form the spinning hole 1.
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