PROCESS FOR SPINNING MULTIFILAMENT YARN

摘要

A spinneret is used to reduce filament breakage during spinning of multifilament yarn being stretched at a high stretch ratio. The spinneret has a first group of spinning holes with capillaries and a second group of spinning holes with capillaries. The capillaries of the second group of spinning holes have a lower length to diameter (L/D) ratio than the capillaries of the first group of spinning holes. All of the capillaries have the same diameter, which is 100 μm or less.

主权项

1. A spinneret comprising:
a first surface, a second surface parallel to the first surface, and at least a first group of spinning holes and a second group of spinning holes, each spinning hole comprising an entrance opening, a conically shaped channel, and a cylindrically shaped capillary,wherein:
an exit side of all the capillaries is located in a plane of the second surface of the spinneret, the capillaries of the second group of spinning holes have a lower length/diameter (L/D) ratio than the capillaries of the first group of spinning holes, all capillaries have the same diameter, and the diameter of all capillaries is 100 μm or less.