# US 2019/0169792 A1 · Composite Material and Reinforcing Fiber

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- Number: US 2019/0169792 A1
- Document ID: US20190169792A1
- Status: Published application
- Kind: A1
- Application number: 16/259,987
- Filed: 2019-01-28
- Published: 2019-06-06
- Earliest claimed: 2014-10-23
- Assignees: Nitta Corporation
- Applicants: NITTA Corporation
- Inventors: Takuji Komukai; Maki Onizuka; Hiromi Teruhira; Katsuyuki Nakai
- Web page: https://patentgrep.com/patent/US20190169792A1

## CPC

- D06M 11/74: with carbon or graphite; with carbides; with graphitic acids or their salts
- C01B 32/158: Carbon nanotubes
- C08J 5/042: {with carbon fibres}
- C08J 5/06: using pretreated fibrous materials
- D06M 15/55: Epoxy resins
- B05D 1/18: performed by dipping
- C01B 2202/06: Multi-walled nanotubes
- C01B 2202/34: Length
- C01B 2202/36: Diameter
- C08J 2363/00: Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J 2377/02: Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08J2377/10 takes precedence)
- D06M 2101/40: Fibres of carbon
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)

## Abstract

Provided are a composite material and a reinforced fiber. The composite material (1) includes a fiber (3) and a plurality of carbon nanotubes (5) disposed on a surface of the fiber (3). The carbon nanotubes (5) adhere directly to the surface of the fiber (3). The composite material and the reinforced fiber exhibit both of intrinsic functions of the fiber and functions, such as electrical conductivity, thermal conductivity, and mechanical strength, derived from CNTs.

## Claims

### Claim 1

A composite material comprising:
a fiber; and
a plurality of carbon nanotubes disposed on a surface of the fiber, wherein
the carbon nanotubes adhere directly to the surface of the fiber.

### Claim 2 (depends on 1)

The composite material according to claim 1, wherein the carbon nanotubes adhere directly to the surface of the fiber, without any intervening material.

### Claim 3 (depends on 2)

The composite material according to claim 2, wherein the intervening material includes at least a dispersing agent.

### Claim 4 (depends on 1, 2, 3)

The composite material according to any one of claims 1 to 3, wherein the fiber has a diameter of approximately 3 to 150 μm.

### Claim 5 (depends on 4)

The composite material according to claim 4, wherein the fiber is a carbon fiber.

### Claim 6 (depends on 1, 2, 3, 4, 5)

The composite material according to any one of claims 1 to 5, wherein the carbon nanotubes include multi-walled carbon nanotubes each having a length of 0.1 to 50 μm and a diameter of 30 nm or less.

### Claim 7 (depends on 6)

The composite material according to claim 6, wherein the carbon nanotube has a diameter of 20 nm or less.

### Claim 8 (depends on 1, 2, 3, 4, 5, 6, 7)

A reinforced fiber comprising:
the composite material according to any one of claims 1 to 7; and
a resin composition covering a surface of the composite material.