Patent ID: 6113842
Filing Date: 2000-09-05
Classification: C08J

Abstract:
A method of manufacturing oriented cellulose films by spinning non-derivated cellulose dissolved in amino oxides in external and internal precipitating bathe, comprising the steps of:extruding a cellulose solution downwards through a film-blower nozzle and an external air gap as a film tube into the precipitating bath, said air gap consisting of an open space between the film blower nozzle and the precipitating bath, and continuously inflating the film tube by a gas pressure enclosed in an internal air gap between the film-blower nozzle and the extruded film tube before the film tube reaches the internal precipitating bath,wherein said nozzle is located above the internal precipitating bath and the internal air gap is defined by an space between the film blower nozzle and the internal precipitating bath and said internal air gap is between 0.1 and 30 mm.