description in accordance with this example an extrusion device as illustrated in fig1 is used in this form an extrusion device contains an extrusion plate 6 which is curved in the direction of the gas flow with a profile at extrusion openings 1 which reproduces the profile of the surface of a water bath as a collecting bath when the material fluid flows thereinto as a result of extrusion under pressure the material fluid is shaped by the shape of the extrusion openings for example into filaments and is drawn further by passing through the gas flow as a result of cooling the tackiness is reduced in order to prevent adhesion upon entry into the water bath during operation an extrusion device according to fig1 was tested when spinning cellulose filaments with a cellulose nmmo water solution a spinning solution cellulose 12 9 nmmo 76 3 water 10 8 all in by weight is produced by mixing an aqueous amine oxide solution and cellulose by removing excess water in an evaporation process upstream of the spinning process wherein the cellulose the polymer dissolves in the concentrated solvent to form a polymer material already during this solution production process which is carried out at negative pressure it was established that nmmo nmm n methylmorpholine decomposition product of nmmo and.