Decorative sheet, method of manufacturing the same, and display device

Patent metadata

Field	Value
Publication number	US-2020282702-A1
Application number	US-202016796776-A
Country	US
Kind code	A1
Filing date	Feb 20, 2020
Priority date	Mar 6, 2019
Publication date	Sep 10, 2020
Grant date	—

Abstract

A decorative sheet including: a material sheet of which a surface roughness R1 on a front side is greater than a surface roughness R2 on a back side; a first adhesive layer provided on the front side of the material sheet; a thin film layer provided above the front side of the material sheet via the first adhesive layer; a second adhesive layer provided on the back side of the material sheet; and a sheet support layer provided below the back side of the material sheet via the second adhesive layer, in which each of the layers is integrated as one sheet, and an air layer exists on an interface between the first adhesive layer and a trough of an uneven shape on the front side of the material sheet.

First claim

What is claimed is:

1 . A decorative sheet comprising:
a material sheet including a front side and a back side opposite to the front side, the front side having a first surface roughness greater than a second surface roughness of the back side; a first adhesive layer provided on the front side of the material sheet; a thin film layer provided above the front side of the material sheet via the first adhesive layer; a second adhesive layer provided on the back side of the material sheet; and a sheet support layer provided below the back side of the material sheet via the second adhesive layer, wherein the thin film layer has a multilayer structure including at least one or more hard coat layers and one or more ultraviolet (UV) cut-off layers, and the material sheet, the first adhesive layer, the thin film layer, the second adhesive layer, and the sheet support layer are integrated as one sheet, and an air layer exists on an interface between the first adhesive layer and a trough of an uneven shape on the front side of the material sheet.

2 . The decorative sheet of claim 1 ,
wherein in a case where a surface roughness on a surface of the thin film layer opposite to the first adhesive layer is denoted by RA, a surface roughness on the front side of the material sheet is denoted by RB, and a surface roughness on a surface of the sheet support layer facing the second adhesive layer is denoted by RC, the surface roughnesses satisfy a relationship of RB>RA>RC.

3 . The decorative sheet of claim 1 ,
wherein the sheet support layer comprises at least one selected from the group consisting of a polymer film containing polyethylene terephthalate, acryl, or polycarbonate as a main component and a nonwoven fabric.

4 . The decorative sheet of claim 1 , further comprising:
a reinforcing layer comprising a resin and provided on a side of the sheet support layer opposite to the second adhesive layer.

5 . The decorative sheet of claim 1 ,
wherein an uneven shape different from the uneven shape on the front side of the material sheet in a case of being viewed from a normal direction is disposed on a surface of the thin film layer opposite to the first adhesive layer.

6 . The decorative sheet of claim 1 , further comprising:
a light source irradiating the decorative sheet with light from the back side toward the front side.

7 . The decorative sheet of claim 1 ,
wherein a printing layer including at least one or more concealing layers and one or more light diffusing layers, a base material for providing the printing layer, and a fourth adhesive layer bonding the base material to the sheet support layer are provided in order between the second adhesive layer and the sheet support layer.

8 . The decorative sheet of claim 1 ,
wherein the material sheet is at least one material sheet selected from the group consisting of stone, wood, cork, cloth, and leather.

9 . A display device comprising:
the decorative sheet of claim 1 ; and a contact operation control device provided on a surface of the sheet support layer opposite to the second adhesive layer in the decorative sheet and provided for a user to control an electronic device.

10 . A display device comprising:
the decorative sheet of claim 1 ; and a noncontact operation control device provided on a surface of the sheet support layer opposite to the second adhesive layer in the decorative sheet and provided to control an electronic device in accordance with a palm or arm motion of a user.

11 . A display device comprising:
the decorative sheet of claim 1 ; and a contact operation control device and a noncontact operation control device provided on a surface of the sheet support layer opposite to the second adhesive layer in the decorative sheet and provided to control an electronic device, wherein the contact operation control device and the noncontact operation control device can assign control of an operation in accordance with a use content of a user.

12 . A method of manufacturing a decorative sheet comprising:
a step of disposing a first adhesive layer and a thin film layer on a front side of a material sheet of which a surface roughness R1 on the front side is greater than a surface roughness R2 on a back side in order and disposing a second adhesive layer and a sheet support layer on the back side of the material sheet in order; a step of sandwiching the thin film layer on the front side of the material sheet and the sheet support layer on the back side of the material sheet from a normal direction and applying heat with pressure; and a step of removing heat and pressure applied to the thin film layer, the first adhesive layer, the material sheet, the second adhesive layer, and the sheet support layer.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Sugiyama Tomonori
• Kaneuchi Kazuhiko
• Nakagawa Hideaki
• Nagahara Takayuki

Classifications

• B32B9/025

  comprising leather · CPC title

• B32B2457/208

  Touch screens · CPC title

• B32B9/02

  comprising animal or vegetable substances {, e.g. cork, bamboo, starch} · CPC title

• B32B9/047

  made of fibres or filaments · CPC title

• B32B9/045

  of synthetic resin · CPC title