SPINNERET FOR FORMING CHEMICAL THREADS AND FIBRES FROM SOLUTIONS

摘要

The invention relates to spinnerets for forming chemical threads from solutions, in particular to spinnerets made of zirconium based material. The aim of the invention is to develop a spinneret which excludes the adhesion of material thereof to a cutting tool during the embodiment of a small calibrated hole having a perfect shape, thereby increasing the operating life of said spinneret, the stability of a moulding process and the quality of the such produced threads and fibres without degrading the corrosion stability of the spinneret. To that effect, said spinneret is made of a zirconium alloy containing: 0.05-1.1 mass % of niobium; 0.001-0.2 mass % of oxygen; 0.001-0.006 mass % of nitrogen; 0.001-0.02 mass % of silicium; 0.001-0.05 mass % of iron; 0.001-0.005 mass % of molybdenum; 0.005-0.26 mass % of impurities; the rest being zirconium. Said invention makes it possible to increase the operating time of the spinneret by 8-27 %, the stability of moulding process and improve the quality of threads and fibres.