Manufacturing device and the method of preparing for the nanofibers via electro blown spinning process

• US 9,279,203 B2
• Filed: 08/27/2009
• Issued: 03/08/2016
• Est. Priority Date: 03/26/2002
• Status: Active Grant

• Current Assignee: DuPont Safety & Construction, Inc. (DuPont de Nemours, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.), Nano Technics Company, Ltd.
• Inventors: Kim, Yong Min, Sung, Young Bin, Jang, Rai Sang, Ahn, Kyoung Ryoul
• Primary Examiner(s): Gupta, Yogendra
• Assistant Examiner(s): LEYSON, JOSEPH S
• Application Number:
  US12/548,732
• Publication Number:
  US 20090325449A1
• Time in Patent Office: 2,385 Days
• Field of Search: 425/72.2, 425/83.1, 425/174.8 E, 425/7
• US Class Current: 1/1
• CPC Class Codes: D01D 5/0038 the fibre formed by solvent evaporation, i.e. dry electro-spinning
• CPC Class Codes: D01D 5/0061 characterised by the electro-spinning apparatus
• CPC Class Codes: D01D 5/0069 characterised by the spinning section, e.g. capillary tube, protrusion or pin
• CPC Class Codes: D01D 5/14 with flowing liquid or gaseous stretching media , e.g. solution-blowing
• CPC Class Codes: D01F 6/18 from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
• CPC Class Codes: D01F 6/38 comprising unsaturated nitriles as the major constituent
• CPC Class Codes: D01F 6/60 from polyamides from polyamino acids or polypeptides D01F6/68
• CPC Class Codes: D04H 1/728 by electro-spinning electro-spinning methods and apparatus D01D5/0007
• CPC Class Codes: D04H 3/03 at random
• CPC Class Codes: D04H 3/16 with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
• CPC Class Codes: Y10T 442/614 Strand or fiber material specified as having microdimensions [i.e., microfiber]

Abstract

The invention relates to a nanofiber web preparing apparatus and method via electro-blown spinning. The nanofiber web preparing method includes feeding a polymer solution, which is a polymer dissolved into a given solvent, toward a spinning nozzle, discharging the polymer solution via the spinning nozzle, which is charged with a high voltage, while injecting compressed air via the lower end of the spinning nozzle, and collecting fiber spun in the form of a web on a grounded suction collector under the spinning nozzle, in which both of thermoplastic and thermosetting resins are applicable, the solution does not need to be heated and electrical insulation is readily realized.

Claims

1. An apparatus for preparing a nanofiber web comprising:

a storage tank for preparing a polymer solution;

a spinneret comprising an inlet portion connected to said storage tank and at least one spinning nozzle for discharging the polymer solution fed from the storage tank;

an air nozzle disposed adjacent to the discharge end of the spinning nozzle for injecting compressed air;

high voltage charging means connected to the spinning nozzle; and

a grounded collector for collecting nanofibers discharged from the spinning nozzle in the form of a web wherein the spinning nozzle comprises a capillary tube at its discharge end;

wherein the air nozzle surrounds the spinning nozzle, or is located on both sides of the spinning nozzle, and has an air gap of about 0.5 to 2.0 mm and wherein the capillary tube has a diameter of about 0.1 to 2.0 mm.

2. An apparatus for preparing a nanofiber web comprising:

a storage tank for preparing a polymer solution;

a spinneret comprising an inlet portion connected to said storage tank and a spinning nozzle having a discharge end for discharging the polymer solution fed from the storage tank;

an air nozzle disposed adjacent to the discharge end of the spinning nozzle for injecting compressed air;

high voltage charging means connected to the spinning nozzle; and

a grounded collector for collecting nanofibers discharged from the spinning nozzle wherein the spinning nozzle comprises a capillary tube at its discharge end;

wherein the air nozzle surrounds the spinning nozzle, or is located on both sides of the spinning nozzle, and has an air gap of about 0.5 to 2.0 mm and wherein the capillary tube has a diameter of about 0.1 to 2.0 mm.