| 摘要 |
<p>A process for the preparation of polybenzazole filaments which includes extruding filaments from a spinneret (1) having at least 100 holes, which are arranged to form an annular pattern (2) around the center of the spinneret (1), the center and at least two radial sections (3) of the spinneret (1) having no holes and an average width which is at least 3 times the minimum pitch of the holes, and drawing the filaments through a quench chamber while providing a substantially radial gas flow therein across the spinneret (1) from at least two different directions.</p> |
