Nanofiber manufacturing method and nanofiber manufacturing device

Patent metadata

Field	Value
Publication number	US-10167575-B2
Application number	US-201715409536-A
Country	US
Kind code	B2
Filing date	Jan 19, 2017
Priority date	Sep 4, 2014
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

The present invention provides a nanofiber manufacturing method and a nanofiber manufacturing device. A solution 25 in which a polymer is dissolved in a solvent is supplied from a distal end of a nozzle 16 to form a Taylor cone 44 at a distal end opening 16b. By applying a voltage between the solution 25 and a collector 50 using a power supply portion 62, an electrospinning jet 45 is sprayed from the Taylor cone 44 to the collector 50. At the start or stop of electrospinning, a blocking member 48 is inserted into a spraying area 42 of the electrospinning jet 45 such that an unstable electrospinning jet or unstable nanofibers are received. A product is not manufactured from an unstable electrospinning jet formed at the start or stop of electrospinning, and the manufacturing of a defective product is prevented.

First claim

What is claimed is:

1. A nanofiber manufacturing method comprising:
supplying a solution in which a polymer is dissolved in a solvent from a distal end of a nozzle;
applying a voltage between the solution and a collector; and
spraying fibers from the solution to the collector,
wherein a blocking member is disposed so as to be movable between an insertion position, where the blocking member is inserted between the nozzle and the collector such that the fibers are received, and a retreat position, where the blocking member retreats from the insertion position such that the fibers are sprayed from the nozzle to the collector, and
a voltage is applied between the nozzle and the blocking member in a state where the blocking member is positioned at the insertion position.

2. The nanofiber manufacturing method according to claim 1 , wherein the blocking member is positioned at the retreat position during the manufacturing of the fibers, and
the blocking member is positioned at the insertion position at the start and end of the manufacturing of the fibers.

3. The nanofiber manufacturing method according to claim 1 , wherein the voltage is applied in a state where a distal end of the blocking member reaches a spraying area of the fibers, and
the voltage application is stopped in a state where the distal end of the blocking member passes the spraying area.

4. The nanofiber manufacturing method according to claim 2 , wherein the voltage is applied in a state where a distal end of the blocking member reaches a spraying area of the fibers, and
the voltage application is stopped in a state where the distal end of the blocking member passes the spraying area.

5. The nanofiber manufacturing method according to claim 3 , wherein the voltage application between the solution and the collector is stopped in a state where the voltage is applied between the solution and the blocking member.

6. The nanofiber manufacturing method according to claim 4 , wherein the voltage application between the solution and the collector is stopped in a state where the voltage is applied between the solution and the blocking member.

7. The nanofiber manufacturing method according to claim 1 , wherein the polymer is a cellulose polymer.

8. The nanofiber manufacturing method according to claim 2 , wherein the polymer is a cellulose polymer.

9. The nanofiber manufacturing method according to claim 3 , wherein the polymer is a cellulose polymer.

10. The nanofiber manufacturing method according to claim 4 , wherein the polymer is a cellulose polymer.

11. The nanofiber manufacturing method according to claim 5 , wherein the polymer is a cellulose polymer.

12. The nanofiber manufacturing method according to claim 6 , wherein the polymer is a cellulose polymer.

Assignees

• Fujifilm Corp

Inventors

• Ogura Tooru
• Katai Yukihiro
• Arai Toshinao

Classifications

• D01D5/0092

  characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields · CPC title

• D01F2/28

  from organic cellulose esters or ethers, e.g. cellulose acetate · CPC title

• D04H1/728

  by electro-spinning {(electro-spinning methods and apparatus D01D5/0007)} · CPC title

• D01D5/0076

  characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid (D01D5/0046 takes precedence) · CPC title

• D01D5/0061 Primary

  characterised by the electro-spinning apparatus · CPC title