# US 2021/0277546 A1 · Multilayer textile for sandwich structure, and sandwich structure fiber-reinforced composite

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- Number: US 2021/0277546 A1
- Document ID: US20210277546A1
- Status: Published application
- Kind: A1
- Application number: 16/319,568
- Filed: 2017-06-29
- Published: 2021-09-09
- Earliest claimed: 2016-07-29
- Assignees: Kabushiki Kaisha Toyota Jidoshokki
- Applicants: Kabushiki Kaisha Toyota Jidoshokki
- Inventors: Genki YOSHIKAWA
- Web page: https://patentgrep.com/patent/US20210277546A1

## CPC

- B32B 5/28: impregnated with or embedded in a plastic substance {(not used)}
- D03D 11/00: Double or multi-ply fabrics not otherwise provided for
- B32B 5/024: {Woven fabric}
- B32B 5/06: characterised by a fibrous {or filamentary} layer {mechanically connected, e.g. by needling} to another layer, e.g. of fibres, of paper
- B32B 5/10: characterised by a fibrous {or filamentary} layer reinforced with filaments
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 7/02: Physical, chemical or physicochemical properties
- B32B 7/09: by stitching, needling or sewing (by {mechanically connecting} fibrous layers {to another layer} B32B5/06)
- C08J 5/04: Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J 5/048: {Macromolecular compound to be reinforced also in fibrous form}
- C08J 5/246: {using polymer based synthetic fibres}
- B32B 2250/03: 3 layers
- B32B 2250/20: All layers being fibrous or filamentary
- B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
- B32B 2260/023: Two or more layers
- B32B 2260/046: Synthetic resin
- B32B 2262/0253: Polyolefin fibres
- B32B 2262/0261: Polyamide fibres
- B32B 2262/0276: Polyester fibres
- B32B 2262/0284: Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
- B32B 2262/101: Glass fibres
- B32B 2262/105: Ceramic fibres
- B32B 2262/106: Carbon fibres, e.g. graphite fibres
- B32B 2307/546: Flexural strength; Flexion stiffness
- B32B 2307/72: Density
- B32B 2605/08: Cars
- B32B 2605/18: Aircraft
- C08J 2363/00: Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J 2377/06: Polyamides derived from polyamines and polycarboxylic acids (C08J2377/10 takes precedence)
- C08J 2463/00: Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J 2477/06: Polyamides derived from polyamines and polycarboxylic acids (C08J2477/10 takes precedence)
- D10B 2101/12: Carbon; Pitch
- D10B 2321/022: polypropylene
- D10B 2331/02: polyamides (D10B2331/08 takes precedence)
- D10B 2331/04: polyesters, e.g. polyethylene terephthalate [PET]
- D10B 2331/061: polyetherketones, polyetheretherketones, e.g. PEEK
- D10B 2331/301: polyarylene sulfides, e.g. polyphenylenesulfide
- D10B 2505/02: Reinforcing materials; Prepregs
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- 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)
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

A multilayer textile for a sandwich structure includes skins made of a fiber-reinforced resin and a core that is sandwiched by the skins. Skin portions are each configured by a warp and a weft both made of a reinforcement fiber. A core portion is configured by a warp and a weft both made of a fiber that is insoluble in a matrix resin of the skins and has a smaller specific gravity than the reinforcement fiber. The skin portions and the core portion are integrated by a binding yarn that is insoluble in the matrix resin of the skins.

## Claims

### Claim 1

A multilayer textile for a sandwich structure, comprising skins made of a fiber-reinforced resin and a core that is sandwiched by the skins, wherein
skin portions that are converted into the skins are each configured by a warp and a weft, each of the warp and the weft of the skin portions being made of a reinforcement fiber,
a core portion that is converted into the core is configured by a warp and a weft, each of the warp and the weft of the core portion being made of a fiber that is insoluble in a matrix resin of the skins and has a smaller specific gravity than the reinforcement fiber, and
the skin portions and the core portion are integrated by a binding yarn that is insoluble in the matrix resin of the skins.

### Claim 2 (depends on 1)

The multilayer textile according to claim 1, wherein the binding yarn is configured by a non-reinforcement fiber.

### Claim 3 (depends on 1)

The multilayer textile according to claim 1, wherein the core portion has a rib-configuring portion made of a reinforcement fiber.

### Claim 4 (depends on 1)

The multilayer textile according to claim 1, wherein the fiber that is insoluble in the matrix resin of the fiber-reinforced resin and has a smaller specific gravity than the reinforcement fiber is an organic fiber.

### Claim 5 (depends on 1)

A sandwich structure fiber-reinforced composite formed by combining the multilayer textile for a sandwich structure according to claim 1 and a matrix resin.