# US 10,479,871 B2 · Fiber structure for fiber reinforced composite material, method for manufacturing fiber structure for fiber reinforced composite material, and fiber reinforced composite material

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- Number: US 10,479,871 B2
- Document ID: US10479871B2
- Status: Granted
- Kind: B2
- Application number: 15/763,578
- Filed: 2016-09-14
- Published: 2018-12-13
- Granted: 2019-11-19
- Earliest claimed: 2015-10-02
- Assignees: Kabushiki Kaisha Toyota Jidoshokki
- Applicants: Kabushiki Kaisha Toyota Jidoshokki
- Inventors: Genki Yoshikawa; Ryuta Kamiya
- Web page: https://patentgrep.com/patent/US10479871B2

## CPC

- C08J 5/005: {Reinforced macromolecular compounds with nanosized materials, e.g. nanoparticles, nanofibres, nanotubes, nanowires, nanorods or nanolayered materials}
- B29C 70/14: oriented
- C08J 5/06: using pretreated fibrous materials
- D02J 1/18: Separating or spreading
- D02J 1/225: {Mechanical characteristics of stretching apparatus}
- D04H 1/645: Impregnation followed by a solidification process
- D04H 1/74: the fibres being orientated, e.g. in parallel {(anisotropic fleeces)}
- B29K 2995/0091: Damping, energy absorption
- D10B 2505/02: Reinforcing materials; Prepregs
- Y10T 428/24124: Fibers
- Y10T 428/24132: including grain, strips, or filamentary elements in different layers or components parallel
- 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)
- 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)
- D02J: FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE (curling or crimping D02G; by treatment with liquids, gases or vapours D06B; finishing other than by liquid treatment, of yarns in warp or sheet form D06C; for chemical matters, see D06L, D06M, D06P, D06Q; treatment during rope-making, apparatus for treating ropes auxiliary to rope-making D07B)
- 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)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A fiber structure for a fiber-reinforced composite material includes a section in which a width varies continuously along a central axis in a plan view. In a section in which the width increases continuously along the central axis, discontinuous fibers are aligned radially along the central axis, and both a thickness of the fiber structure and a density of the discontinuous fibers are uniform.

## Claims

### Claim 1

A fiber structure for a fiber-reinforced composite material, which includes a fiber structure of discontinuous fibers and matrix resin impregnated into the fiber structure, the fiber structure comprising a section in which a width varies continuously along a central axis in a plan view,
wherein, in a section in which the width increases continuously along the central axis, discontinuous fibers are aligned radially along the central axis, and both a thickness of the fiber structure and a density of the discontinuous fibers are uniform.

### Claim 2 (depends on 1)

The fiber structure for a fiber-reinforced composite material according to claim 1, wherein, in a plan view, the fiber structure has a sectoral shape having arcuate sections at opposite ends.

### Claim 3 (depends on 1)

A fiber-reinforced composite material including a fiber structure and matrix resin impregnated into the fiber structure, wherein the fiber structure according to claim 1 is used.