# US 10,370,777 B2 · Nanofiber manufacturing device and nanofiber manufacturing method

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- Number: US 10,370,777 B2
- Document ID: US10370777B2
- Status: Granted
- Kind: B2
- Application number: 15/261,305
- Filed: 2016-09-09
- Published: 2016-12-29
- Granted: 2019-08-06
- Earliest claimed: 2014-12-18
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Ikuo Uematsu; Naoya Hayamizu
- Web page: https://patentgrep.com/patent/US10370777B2

## CPC

- D01D 5/0061: {characterised by the electro-spinning apparatus}
- B29C 48/04: Particle-shaped (making granules B29B9/00)
- B29C 48/05: Filamentary, e.g. strands
- B29C 48/142: {using force fields, e.g. gravity or electrical fields (B29C48/9165 takes precedence)}
- B29C 48/147: {after the die nozzle}
- D01D 5/0069: {characterised by the spinning section, e.g. capillary tube, protrusion or pin}
- D04H 1/728: by electro-spinning {(electro-spinning methods and apparatus D01D5/0007)}
- B29C 48/02: Small extruding apparatus, e.g. handheld, toy or laboratory extruders
- B29C 48/3001: {characterised by the material or their manufacturing process}
- D01D 5/003: {the material being a polymer solution or dispersion (D01D5/0053 takes precedence)}
- D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B)

## Abstract

According to the embodiment, a nanofiber manufacturing device that includes an ejector and a power generator is provided. The ejector is capable of ejecting a solution from a head portion toward a target. The power generator generates a potential difference between the head portion and the target. The head portion includes a first guide having a first surface and a second guide having a second surface, the first surface and the second surface making a gap, the gap being capable of maintaining the solution. A tip of at least one of the first guide and the second guide includes a maintain portion provided so as to be capable of maintaining the solution.

## Claims

### Claim 1

A nanofiber manufacturing device comprising:
an ejector that is capable of ejecting a solution from a head portion toward a target; and
a power generator that generates a potential difference between the head portion and the target, wherein
the head portion includes a first guide having a first surface and a second guide having a second surface, the first surface and the second surface making a gap, the gap being capable of maintaining the solution,
a tip of at least one of the first guide and the second guide includes a maintain portion provided so as to be capable of maintaining the solution,
the tip of at least one of the first guide and the second guide has a concave and a convex, and
a step is provided between an end portion of the first guide and an end portion of the second guide.

### Claim 2 (depends on 1)

The device according to claim 1, wherein the gap has a substantially circular ring shape when projected on a plane parallel to a direction from the first guide to the second guide.

### Claim 3 (depends on 1)

The device according to claim 1, wherein the gap partly has a substantially arc shape when projected on a plane parallel to a direction from the first guide to the second guide.

### Claim 4 (depends on 1)

The device according to claim 1, wherein the first guide has a sloped end portion, and the second guide has a sloped end portion.

### Claim 5 (depends on 4)

The device according to claim 4, wherein
the sloped end portion of the first guide is downwardly sloped toward an inner side of the head portion, and
the sloped end portion of the second guide is downwardly sloped toward an outer side of the head portion.

### Claim 6 (depends on 1)

The device according to claim 1, wherein the gap has a width of 0.1 mm or more and 5.0 mm or less.

### Claim 7 (depends on 1)

A nanofiber manufacturing method using the nanofiber manufacturing device of claim 1,
the method comprising:
supplying the solution to the ejector;
applying a voltage between the ejector and the target; and
depositing a nanofiber on the target.