# US 12,109,792 B2 · Vehicle interior material

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- Number: US 12,109,792 B2
- Document ID: US12109792B2
- Status: Granted
- Kind: B2
- Application number: 17/270,510
- Filed: 2019-01-25
- Published: 2021-12-23
- Granted: 2024-10-08
- Earliest claimed: 2019-01-25
- Assignees: Kotobukiya Fronte Co., Ltd.
- Applicants: Kotobukiya Fronte Co., Ltd.
- Inventors: Kazuki Fukui
- Web page: https://patentgrep.com/patent/US12109792B2

## CPC

- B32B 3/12: characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
- B32B 1/00: Layered products having a non-planar shape
- B32B 3/04: characterised by {at least one} layer folded at the edge, e.g. over another layer {; characterised by at least one layer enveloping or enclosing a material}
- B32B 3/266: {characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12}
- B32B 3/28: characterised by a layer comprising a deformed thin sheet {, i.e. the layer having its entire thickness deformed out of the plane}, e.g. corrugated, crumpled (B32B29/08 takes precedence)
- B32B 3/30: characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)}
- B32B 5/02: characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)}
- B32B 5/022: {Non-woven fabric}
- B32B 5/18: characterised by features of a layer {of} foamed material
- B32B 7/022: Mechanical properties
- B32B 7/04: Interconnection of layers
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/06: of {natural rubber or synthetic} rubber
- B32B 15/08: of synthetic resin
- B32B 15/085: comprising polyolefins
- B32B 15/088: comprising polyamides
- B32B 15/09: comprising polyesters
- B32B 15/18: comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)}
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- B32B 25/045: {of foam}
- B32B 25/06: of paper or cardboard
- B32B 25/08: of synthetic resin
- B32B 25/10: next to a fibrous or filamentary layer
- B32B 25/14: comprising {synthetic rubber copolymers (B32B25/18 and B32B25/20 take precedence)}
- B32B 25/16: comprising polydienes {homopolymers} or poly-halodienes {homopolymers (B32B25/12 takes precedence)}
- B32B 27/065: {of foam}
- B32B 27/08: of synthetic resin
- B32B 27/10: of paper or cardboard
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/18: characterised by the use of special additives
- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B60R 13/02: {Internal} Trim mouldings {; Internal} Ledges; Wall liners {for passenger compartments}; Roof liners (B60R13/01 takes precedence {; padded linings for the vehicle interior B60R21/04; arrangements or adaptations of floor mats or carpets in vehicles B60N3/04; internal lining for trains B61D17/18})
- B32B 2250/04: 4 layers
- B32B 2262/0253: Polyolefin fibres
- B32B 2262/0284: Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
- B32B 2264/0207: Particles made of materials belonging to B32B25/00
- B32B 2264/102: Oxide or hydroxide
- B32B 2264/104: Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
- B32B 2266/025: Polyolefin
- B32B 2266/0257: Polyamide
- B32B 2266/0278: Polyurethane
- B32B 2274/00: Thermoplastic elastomer material
- B32B 2307/102: Insulating
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/718: Weight, e.g. weight per square meter
- B32B 2307/724: Permeability to gases, adsorption
- B32B 2307/732: Dimensional properties
- B32B 2307/738: Thermoformability
- B32B 2605/003: Interior finishings
- 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

## Abstract

The vehicle interior material of the present invention has a multilayer structure, the material including: a hard core layer having a hollow portion inside; a design layer provided on one surface side of the core layer; a first film layer provided between the core layer and the design layer; and a second film layer provided on a surface of the core layer on a side opposite to the first film layer, wherein a strain ca is smaller than a strain εb, the strain εa being a strain on a surface of a structure on a side of the first film layer, the structure having the first film layer, the core layer, and the second film layer, and the strain εb being a strain on a surface of the structure on a side of the second film layer.

## Claims

### Claim 1

A vehicle interior material having a multilayer structure, the material consisting of:
a hard core layer having a hollow portion inside;
a design layer provided on one surface side of the core layer, the design layer located on an interior side of a vehicle;
a first film layer provided between the core layer and the design layer, the first film layer being a first non-apertured film comprising a resin film material or elastomer film material and having a first tensile-compressive rigidity; and
a second film layer provided on a surface of the core layer on a side opposite to the first film layer, the second film layer being a second non-apertured film comprising a resin film material or elastomer film material and having a second tensile-compressive rigidity that is lower than the first tensile-compressive rigidity,
wherein a strain εa is smaller than a strain εb, the strain εa being a strain on a surface of a structure on a side of the first film layer, the structure consisting of the first film layer, the core layer, and the second film layer, and the strain εb being a strain on a surface of the structure on a side of the second film layer,
wherein a thickness h of the structure is less than 20 mm, and
wherein a relationship among the strain εa, the strain εb, and the thickness h of the structure satisfies the expression 0<εa×h/(εa+εb)<5.

### Claim 2 (depends on 1)

The vehicle interior material according to claim 1, wherein the core layer has a structure in which tubular cells are arranged in a plurality of rows.

### Claim 3 (depends on 2)

The vehicle interior material according to claim 2, wherein each of the tubular cells in the core layer has a closed surface at one end and an open end at another end,
the open end allows an internal space of a cell of the tubular cells to be in communication with an outside, and
the open ends of the tubular cells are arranged on both sides of the core layer such that rows of the open ends of the tubular cells are in every other row.

### Claim 4 (depends on 1)

The vehicle interior material according to claim 1, wherein the core layer has a thickness of at least 10.5 mm.

### Claim 5 (depends on 1)

The vehicle interior material according to claim 1, wherein the first and second film layers are made of the same resin film material, and the first film layer has inorganic particles disposed therein.

### Claim 6 (depends on 1)

The vehicle interior material according to claim 1, wherein the first and second film layers are made of the same elastomer film material, and the second film layer has rubber particles dispersed therein.

### Claim 7 (depends on 1)

The vehicle interior material according to claim 1, wherein the first film layer consists of the resin film material and a metal foil laminated thereon.