Spinning nozzle for preparing a fiber precursor

Abstract

A spinning nozzle for dry spinning a spinning solution containing a metal compound and an organic polymer compound by a blowing method. In the spinning nozzle, an air nozzle 6 is provided having a rectangular-prism-like slit which is formed by opposing inner surfaces, extending in parallel to each other. The opposing inner surfaces each include a projecting portion, which are formed at the front side of a pair of cover plates 1,1, with each of the projecting portions having a knife edge portion at its free end. Spinning solution supplying nozzles are composed of a plurality of linear pipes and are arranged in the air nozzle 6 in such a manner that they are in parallel to the parallel surfaces of the cover plates and project from the edges of the the parallel surfaces. Air fed through a gas feeding port 5 and blown out as an air stream from the air nozzle 6, and streams of the spinning solution extruded from the spinning solution supplying nozzles form parallel streams. Further, the air stream in parallel to the spinning solution streams is sufficiently rectified so that it contacts the spinning solution. Accordingly, an amount of air used can be greatly reduced and fibers having excellent quality can be produced.