| 摘要 |
<p>In a melt-spinning process for spinning continuous polymeric filaments, cooling gas is introduced to freshly extruded molten filaments in a zone below the spinneret. The filaments and the cooling gas are passed together out of the zone through a tube that is of restricted dimensions and that surrounds the filaments as they cool. The top of the tube is spaced up to 80 cm below the face of the spinneret. By accelerating the gas so that it leaves the tube at a speed that is less than the speed of the filaments, and by providing the top of the tube spaced less than 80 cm below the spinneret, it is possible to produce a yarn with improved uniformity without encountering handling problems. In addition, with such a process, it is possible to increase the withdrawal speed of the yarn without a corresponding reduction in the elongation or an increase in the draw tension.</p> |
