# US 11,999,144 B2 · Decorative sheet and decorative panel

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- Number: US 11,999,144 B2
- Document ID: US11999144B2
- Status: Granted
- Kind: B2
- Application number: 16/487,495
- Filed: 2018-02-28
- Published: 2020-02-20
- Granted: 2024-06-04
- Earliest claimed: 2017-02-28
- Assignees: Dai Nippon Printing Co., Ltd.
- Applicants: Dai Nippon Printing Co., Ltd.
- Inventors: Tomomi Nakajima; Jun Kaneki; Hiroki Kawanishi; Ryo Fujii; Osamu Watanabe
- Web page: https://patentgrep.com/patent/US11999144B2

## CPC

- B32B 7/022: Mechanical properties
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/00: Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)}
- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/26: using curing agents
- B32B 27/40: comprising polyurethanes
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/26: Polymeric coating
- B32B 2264/10: Inorganic particles
- B32B 2307/536: Hardness
- B32B 2307/554: Wear resistance
- B32B 2307/584: Scratch resistance
- B32B 2451/00: Decorative or ornamental articles
- B32B 2471/00: Floor coverings (B32B2419/04 takes precedence)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

The present invention provides a decorative sheet that exhibits excellent scratch resistance under high-load conditions and excellent bending workability; and provides a decorative plate containing the decorative sheet. Specifically, the present invention provides a decorative sheet that contains, in sequence, a first olefin resin layer, a second olefin resin layer, and a surface-protecting layer, wherein indentation hardness HIT2 of the second olefin resin layer and indentation hardness HIT1 of the surface-protecting layer satisfy the following formulas (1) and (2): HIT2≥100 MPa (1), and HIT1>HIT2 (2). The invention also provides a decorative plate containing the decorative sheet.

## Claims

### Claim 1

A decorative sheet comprising, in sequence, a first olefin resin layer, a second olefin resin layer, and a surface-protecting layer, the decorative sheet having depressions formed from the outermost face of the surface-protecting layer,
wherein the first olefin resin layer is a polyethylene sheet,
wherein the second olefin resin layer is a homo-polypropylene sheet,
wherein the surface-protecting layer comprises a difunctional urethane acrylate oligomer and a hexafunctional aliphatic urethane acrylate oligomer,
wherein the second olefin resin layer comprises a crystal nucleating agent, and the content of the crystal nucleating agent in the second olefin resin layer is 0.01 to 0.1 parts by mass, per 100 parts by mass of the resin component that forms the second olefin resin layer,
wherein the first olefin resin layer has a thickness of 55 to 85 μm, the second olefin resin layer has a thickness of 55 to 85 μm, and the surface-protecting layer has a thickness of 3 to 45 μm, and
wherein indentation hardness HIT2 of the second olefin resin layer and indentation hardness HIT1 of the surface-protecting layer satisfy the following formulas (1) and (2):
140 MPa>HIT2≥100 MPa (1); and
HIT1>HIT2 (2),
wherein the indentation hardness HIT1 of the surface-protecting layer satisfies the following formula (3):
450 MPa>HIT1 (3), and
wherein the indentation hardness HIT2 of the second olefin resin layer and indentation hardness HIT3 of the first olefin resin layer satisfy the following formula (4):
HIT2>HIT3 (4).

### Claim 2 (depends on 1)

The decorative sheet according to claim 1, wherein the second olefin resin layer is a microcrystalline olefin resin layer.

### Claim 3 (depends on 2)

The decorative sheet according to claim 2, wherein the surface-protecting layer comprises inorganic microparticles with a mean particle size of 20 μm or less.

### Claim 4 (depends on 1)

The decorative sheet according to claim 1, wherein the surface-protecting layer comprises inorganic microparticles with a mean particle size of 20 μm or less.

### Claim 5 (depends on 1)

A decorative plate comprising a laminate, the laminate comprising, in sequence in the thickness direction,
a decorative plate base, and
the decorative sheet according to claim 1.

### Claim 6 (depends on 2)

A decorative plate comprising a laminate, the laminate comprising, in sequence in the thickness direction,
a decorative plate base, and
the decorative sheet according to claim 2.