Verfahren zur Herstellung von Fasern mit optischen Eigenschaften

摘要

The method comprises spinning a thermoplastic polymer by a spinneret having an opening with at least one group of first slits 101 arranged parallel to each other and a second slit 102 arranged perpendicular thereto, the spinneret being formed to satisfy a predetermined relation between the length W 3 of the first slit 101 and the width W 2 of the second slit 102. In particular 3W 2 * less than or equal to * W 3 .