# US 2018/0022075 A1 · Vehicle headliner material

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- Number: US 2018/0022075 A1
- Document ID: US20180022075A1
- Status: Published application
- Kind: A1
- Application number: 15/378,664
- Filed: 2016-12-14
- Published: 2018-01-25
- Earliest claimed: 2016-07-21
- Assignees: Daehan Solution Co., Ltd
- Applicants: Daehan Solution Co., Ltd.
- Inventors: Choong Ho Kwon; Yungeun Gwak; SeokJun Yong; Sang-Min Kim
- Web page: https://patentgrep.com/patent/US20180022075A1

## CPC

- B32B 27/12: next to a fibrous or filamentary layer
- 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 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers}
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/325: {comprising polycycloolefins}
- B32B 27/36: comprising polyesters
- B32B 2250/05: 5 or more layers
- B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
- B32B 2260/021: Fibrous or filamentary layer
- B32B 2260/046: Synthetic resin
- B32B 2262/062: Cellulose fibres, e.g. cotton
- B32B 2262/065: Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
- B32B 2262/08: Animal fibres, e.g. hair, wool, silk
- B32B 2262/10: Inorganic fibres
- B32B 2262/101: Glass fibres
- B32B 2307/546: Flexural strength; Flexion stiffness
- B32B 2307/718: Weight, e.g. weight per square meter
- B32B 2307/72: Density
- B32B 2307/7265: Non-permeable
- B32B 2307/732: Dimensional properties
- 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

## Abstract

A vehicle headliner material includes a stiffening layer to prevent moisture penetration by reinforcing each side of a natural fiber layer. In this way, the natural fibers can be prevented from holding moisture, and thus safety accidents that may be caused by increased weight of a headliner material or a headliner being permanently deformed due to the headliner material that repeats holding and releasing moisture can be prevented. The vehicle headliner material is provided with improved formability, improved flexural strength, enhanced structural stiffness, and direct adhesion without an additional adhesive by including a synthetic resin in the natural fiber layer along with natural fibers and using a glass mat and thermoplastic resin sheets as constituent materials of each stiffening layer.

## Claims

### Claim 1

A material for a vehicle headliner, the material comprising:
a natural fiber layer including a mixture of a synthetic resin and natural fibers; and
a stiffening layer disposed on each side of the natural fiber layer,
wherein each stiffening layer includes:
a glass mat as a middle layer; and
a thermoplastic resin sheet on each side of the glass mat.

### Claim 2 (depends on 1)

The material according to claim 1, wherein the natural fiber layer has a thickness of 1 to 3 mm and an areal density of 700 to 900 g/m2.

### Claim 3 (depends on 1)

The material according to claim 1, wherein the natural fiber layer is prepared using at least one type of natural fiber selected from the group consisting of kenaf, hemp, wool, cotton, silk, and mineral fibers.

### Claim 4 (depends on 1)

The material according to claim 1, wherein the stiffening layer has a thickness of 1 to 2 mm and an areal density of 100 to 500 g/m2.

### Claim 5 (depends on 1)

The material according to claim 1, wherein the glass mat has an areal density of 50 to 200 g/m2.

### Claim 6 (depends on 1)

The material according to claim 1, wherein the thermoplastic resin sheet has a thickness of 20 to 250 μm.

### Claim 7 (depends on 1)

The material according to claim 1, wherein the thermoplastic resin sheet consists of at least one selected from the group consisting of polyvinyl chloride (PVC), PS, polypropylene (PP), PE, and polyethylene terephthalate (PET).

### Claim 8 (depends on 1)

The material according to claim 1, wherein the material has an overall thickness of 2 to 5 mm and an areal density of 1,250 to 1,550 g/m2.