Process of preparing continuous filament composed of nano fiber

• US 20050253305A1
• Filed: 07/23/2003
• Published: 11/17/2005
• Est. Priority Date: 02/24/2003
• Status: Active Grant

• Current Assignee: Hag-Young Kim, Finetex Technology Global Ltd. (The InsideIQ Building Automation Alliance)
• Original Assignee: Finetex Technology Global Ltd. (The InsideIQ Building Automation Alliance)
• Inventors: Kim, Hag-Yong, Kim, Hyung-Jun, Gil, Myung-Seop, Lee, Bong-Seok, Jung, Yoon-Ho
• Granted Patent: US 7,354,546 B2
• Time in Patent Office: Days
• US Class Current: 264/465
• CPC Class Codes: D01D 5/0046 the fibre formed by coagulation, i.e. wet electro-spinning
• CPC Class Codes: Y10S 977/84 Manufacture, treatment, or detection of nanostructure
• CPC Class Codes: Y10S 977/904 for medical, immunological, body treatment, or diagnosis

Abstract

The present invention relates to a process of preparing a continuous filament composed of a nano fiber, wherein nano fibers are prepared by spinning a polymer spinning dope in a spinning dope main tank (20) onto the surface of water or organic solvent (4a) of a collector (4), which contains water or inorganic solvent (4a) and has a conductive material (5) with a high voltage applied sunken in the water or organic solvent (4a), through nozzles (2) with a high voltage applied, and the nano fibers are pressed, drawn, dried and wound while being pulled by a rotary roller (6) rotating at a constant linear velocity from the location spaced more than 1 cm from one end of a dropping spot. The present invention can prepare a continuous filament composed of a nano fiber by an electrospinning method and a continuous process.

Claims

1. A process of preparing a continuous filament composed of a nano fiber,

wherein nano fibers are prepared by spinning a polymer spinning dope in a spinning dope main tank (20) onto the surface of water or organic solvent (4a) of a collector (4), which contains water or inorganic solvent (4a) and has a conductive material (5) with a high voltage applied sunken in the water or organic solvent (4a), through nozzles (2) with a high voltage applied, and

the nano fibers spun onto the surface of water or organic solvent (4a) are pressed, drawn, dried and wound while being pulled by a rotary roller (6) rotating at a constant linear velocity from the location spaced more than 1 cm from one end of a dropping spot.

2. The process of claim 1, wherein the conductive material (5) is a metal plate or metal powder.

3. The process of claim 1, wherein the distance (h) from the surface of water or organic solvent (4a) contained in the collector (4) to the top surface of the conductive material (5) is 0.01 to 200 mm.

4. The process of claim 1, wherein the distance (h) from the surface of water or organic solvent (4a) contained in the collector (4) to the top surface of the conductive material (5) is 5 to 50 mm.

5. The process of claim 1, wherein the angle (θ

) between the nano fibers collected on the surface of water or organic solvent (4a) in the collector (4) and the undrawn filament (aggregate of nano fibers) pulled by the rotary roller (6) is 0 to 180°

.

6. The process of claim 1, wherein the angle (θ

) between the nano fibers collected on the surface of water or organic solvent (4a) in the collector (4) and the undrawn filament (aggregate of nano fibers) pulled by the rotary roller (6) is 10 to 90°

.

7. The process of claim 1, wherein the drawn filament (yarn) is twisted before being wound.

8. The process of claim 1, wherein the diameter of the nano fibers is less than 1,000 nm.

9. The process of claim 1, wherein the polymer spinning dope is composed of polyester resin, nylon resin, polysulfon resin, poly lactic acid and a copolymer thereof or a mixture thereof.

10. The process of claim 1, wherein more than two kinds of the polymer spinning dope are spun onto the surface of water of organic solvent (4a) of the collector (4), which contains water or organic solvent (4a) and has the conductive material (5) with a high voltage applied sunken in the water or organic solvent (4a), through each of the nozzles (2).