Patent ID: 7582247
Filing Date: 2009-09-01
Classification: D01D

Abstract:
1. A fiber spinning process comprising: providing an uncharged, electrically conductive polymer-containing liquid stream to a spinneret; issuing said polymer-containing liquid stream in combination with a forwarding gas in a direction from at least one spinning nozzle in said spinneret; passing said polymer-containing liquid stream through an ion flow formed by corona discharge to impart electrical charge to the liquid stream; forming fine polymer fibers of said polymer; and collecting said fine polymer fibers; wherein said polymer-containing liquid stream further comprises a solvent for said polymer, and wherein said ion flow is formed between differentially charged point- and target-electrodes, and the electrodes are disposed a variable die-to-electrode distance (DED) from the spinning nozzle that is short enough to impart electrical charge to the polymer-containing liquid stream prior to fiber formation.