| 摘要 |
PROBLEM TO BE SOLVED: To stably produce a multifilament having little unevenness in thickness and little difference in properties among fibers in a spinneret. SOLUTION: This new spinneret for spinning has a thermal insulation collar having an inner diameter of 2-10 times as long as the caliber of the extruding hole, and formed at the posterior part of the extruding hole of the spinneret.
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