| 摘要 |
PURPOSE:To obtain the subject excellent hollow fiber having continuously extended hollow part having a specific diameter and free from skin layer, by extruding a cupri-ammonium solution of cellulose through an annular spinning nozzle, coagulating the solution in an acetone-aqueous solution coagulation bath, treating in a water bath and regenerating the cellulose. CONSTITUTION:The objective hollow fiber having an hollow part continuously extended through the whole length of the fiber, having an average diameter of the hollow part of 0.01-5mum and free from skin layer can be produced by extruding a cupri-ammonium solution of cellulose through an annular spinning nozzle, coagulating the solution in a coagulation bath composed of an aqueous solution of acetone, treating in a water bath essentially free from acetone and ammonia preferably at 35-70 deg.C and regenerating the cellulose. |
