Patent ID: 6093355
Filing Date: 2000-07-25
Classification: C08J,C08L,D01F

Abstract:
A method for the manufacture of an extruded lyocell article which comprises the steps of:(1) dissolving cellulose in an aqueous tertiary amine N-oxide solvent to form a solution;(2) extruding the solution through a die by way of a gaseous gap into a coagulating bath to form an extruded lyocell precursor;(3) washing the extruded lyocell precursor free from tertiary amine N-oxide; and(4) drying the washed lyocell precursor, thereby forming the extruded lyocell article,in which method the cellulose exhibits a ratio of Pipe Flow Index to Jet Flow Index in the range from 0.85 to 6.0.