Decorative sheet, decorative material, and method of producing decorative sheet

Patent metadata

Field	Value
Publication number	US-11440299-B2
Application number	US-202016884504-A
Country	US
Kind code	B2
Filing date	May 27, 2020
Priority date	Jan 17, 2018
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

A decorative sheet that includes at least a thermoplastic resin substrate layer, a transparent thermoplastic resin layer and a surface protective layer in this order. The surface protective layer is formed by laminating at least two layers. At least a second surface protective layer, which constitutes an outermost layer that is a layer located furthest from the transparent thermoplastic resin layer among layers constituting the surface protective layer contains an ionizing radiation-curable resin containing a multifunctional hexamethylene diisocyanate oligomer at a weight ratio of 60% or more. The arithmetic mean height of a profile curve measured from the second surface protective layer in accordance with JIS B 0601 is 15 μm or more, and the maximum height of the profile curve is 38 μm or more.

First claim

What is claimed is:

1. A decorative sheet, comprising:
at least a thermoplastic resin substrate layer, a transparent thermoplastic resin layer, and a surface protective layer in this order,
wherein the surface protective layer is formed by laminating at least two layers;
wherein at least an outermost layer that is a layer located furthest from the transparent thermoplastic resin layer among layers constituting the surface protective layer contains an ionizing radiation-curable resin containing a multifunctional hexamethylene diisocyanate oligomer at a weight ratio of 60% or more, and,
wherein the arithmetic mean height of a profile curve measured from the outermost layer in accordance with JIS B 0601 is 15 μm or more, and the maximum height of the profile curve is 38 μm or more.

2. The decorative sheet of claim 1 , further comprising a pattern layer interposed between the thermoplastic resin substrate layer and the transparent thermoplastic resin layer.

3. The decorative sheet of claim 1 , wherein the thermoplastic resin substrate layer is formed with a polyolefin-based resin or a polyester-based resin each having a thickness in the range of 10 μm or more and 200 μm or less.

4. The decorative sheet of claim 1 , wherein the transparent thermoplastic resin layer is formed with a polyolefin-based resin or a polyester-based resin each having a thickness in the range of 30 μm or more and 200 μm or less.

5. The decorative sheet of claim 1 , wherein
the surface protective layer is formed by laminating at least one of a first surface protective layer which is laminated to the transparent thermoplastic resin layer, and the outermost layer, and
the thickness of the first surface protective layer is in the range of equal to or more than 1 μm and less than 30 μm.

6. A decorative material, comprising:
the decorative sheet of claim 1 ;
an adhesive layer that is provided on a surface of the thermoplastic resin substrate layer on a side facing a surface closer to the transparent thermoplastic resin layer, and contains an adhesive; and
a substrate that is bonded to the thermoplastic resin substrate layer through the adhesive contained in the adhesive layer.

7. A method of producing a decorative sheet, comprising:
a transparent thermoplastic resin layer forming process of forming a transparent thermoplastic resin layer on one surface of a thermoplastic resin substrate layer; and
a surface protective layer forming process of forming a surface protective layer formed by laminating at least two layers on the transparent thermoplastic resin layer,
characterized in that the surface protective layer forming process includes forming at least an outermost layer that is a layer located furthest from the transparent thermoplastic resin layer among layers constituting the surface protective layer, such that
the outermost layer contains an ionizing radiation-curable resin containing a multifunctional hexamethylene diisocyanate oligomer at a weight ratio of 60% or more, and
the arithmetic mean height of a profile curve measured from the outermost layer in accordance with JIS B 0601 is 15 μm or more, and the maximum height of the profile curve is 38 μm or more.

8. The decorative sheet of claim 1 , wherein the arithmetic mean height of a profile curve measured from the outermost layer in accordance with JIS B 0601 is 15 μm or more and 30 μm or less, and the maximum height of the profile curve is 38 μm or more and 80 μm or less.

9. The decorative sheet of claim 1 , wherein the maximum height of the profile curve is equal to or more than 2.4 times and equal to or less than 2.7 times the arithmetic mean height of the profile curve.

10. The decorative sheet of claim 8 , wherein the maximum height of the profile curve is equal to or more than 2.4 times and equal to or less than 2.7 times the arithmetic mean height of the profile curve.

11. The method of claim 7 , wherein the arithmetic mean height of a profile curve measured from the outermost layer in accordance with JIS B 0601 is 15 μm or more and 30 μm or less, and the maximum height of the profile curve is 38 μm or more and 80 μm or less.

12. The method of claim 7 , wherein the maximum height of the profile curve is equal to or more than 2.4 times and equal to or less than 2.7 times the arithmetic mean height of the profile curve.

13. The method of claim 9 , wherein the maximum height of the profile curve is equal to or more than 2.4 times and equal to or less than 2.7 times the arithmetic mean height of the profile curve.

Assignees

• Toppan Printing Co Ltd

Inventors

• Kinoshita Kazuki

Classifications

• B32B2250/04

  4 layers · CPC title

• B32B2307/75

  Printability · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B2451/00

  Decorative or ornamental articles · CPC title

• B32B37/153

  at least one layer is extruded and immediately laminated while in semi-molten state · CPC title