# US 2018/0022064 A1 · Sound-absorbing material and wire harness provided with sound-absorbing material

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- Number: US 2018/0022064 A1
- Document ID: US20180022064A1
- Status: Published application
- Kind: A1
- Application number: 15/547,149
- Filed: 2016-01-09
- Published: 2018-01-25
- Earliest claimed: 2015-01-30
- Assignees: Autonetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd.
- Applicants: AutoNetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd.
- Inventors: Yutaka TAKATA
- Web page: https://patentgrep.com/patent/US20180022064A1

## CPC

- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B60R 13/08: Insulating elements, e.g. for sound insulation {(sound insulating linings for trains B61D17/185; drivers' cabs for load-carrying vehicles insulated against vibrations or noise B62D33/0604; thermal or acoustic insulation of engines F02B77/11; damping of sounds using compensation by electro-acoustic methods G10K11/178)}
- B60R 16/0207: {Wire harnesses}
- G10K 11/162: Selection of materials
- G10K 11/168: Plural layers of different materials, e.g. sandwiches
- H01B 7/42: with arrangements for heat dissipation or conduction
- H02G 3/04: Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G 3/0487: {with a non-circular cross-section (H02G3/0468, H02G3/0475 take precedence)}
- B60R 16/0215: {Protecting, fastening and routing means therefor}
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES

## Abstract

A sound-absorbing material with a high tensile strength and a wire harness provided with the sound-absorbing material in which the sound-absorbing material and the wire harness are integrated with each other. The sound-absorbing material may include two first nonwoven fabrics that are stacked in their thickness direction and a second nonwoven fabric that is disposed between the two first nonwoven fabrics, in which a portion of end surfaces in a thickness direction of the second nonwoven fabric has fixing portions in which fibers are bonded to each other by an adhesive or a fusion means, and a wire harness provided with the sound-absorbing material in which a wire harness and the sound-absorbing material are integrated other by covering at least a portion of the wire harness extending in an axial direction, with the sound-absorbing material.

## Claims

### Claim 1

A sound-absorbing material, comprising:
two first nonwoven fabrics that are stacked in their thickness direction; and
a second nonwoven fabric that is disposed between the two first nonwoven fabrics,
wherein a portion of end surfaces in a thickness direction of the second nonwoven fabric, before the second nonwoven fabric is disposed between the two first nonwoven fabrics, has fixing portions in which fibers are bonded to each other by an adhesive or a fusion means, and
an airflow rate of the stacked nonwoven fabric obtained by stacking the first nonwoven fabrics and the second nonwoven fabric is in a range of 5 to 50 cm3/cm2·s.

### Claim 2 (depends on 1)

The sound-absorbing material according to claim 1,
wherein the fixing portions are provided over the entirety of at least one of the end surfaces at predetermined intervals.

### Claim 3 (depends on 2)

The sound-absorbing material according to claim 2,
wherein the second nonwoven fabric is a thin film-shaped nonwoven fabric, and
the fixing portions are formed by thermal fusion bonding using an embossing roll.

### Claim 4 (depends on 1)

The sound-absorbing material according to claim 1,
wherein a stacked nonwoven fabric obtained by stacking the first nonwoven fabrics and the second nonwoven fabric has a tensile strength in a direction orthogonal to the thickness direction of at least 10 N/25 mm.

### Claim 5 (depends on 1)

The sound-absorbing material according to claim 1,
wherein the second nonwoven fabric is made from long-staple fibers.

### Claim 6 (depends on 1)

The sound-absorbing material according to claim 1,
wherein the second nonwoven fabric has a smaller thickness than the first nonwoven fabrics.

### Claim 7 (depends on 1)

A wire harness provided with the sound-absorbing material according to claim 1,
wherein the wire harness and the sound-absorbing material are integrated with each other by covering at least a portion of the wire harness extending in an axial direction, with the sound-absorbing material.

### Claim 8

(canceled)