Metal tone decorative sheet and metal tone decorative molded body provided with metal tone decorative sheet

Patent metadata

Field	Value
Publication number	US-12246556-B2
Application number	US-202017788170-A
Country	US
Kind code	B2
Filing date	Dec 24, 2020
Priority date	Dec 27, 2019
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A metal tone decorative sheet has an excellent metallic luster and electromagnetic wave transmissivity, and a metal tone decorative molded body is provided with the metal tone decorative sheet. A metal tone decorative sheet includes a metal layer on a base material layer, wherein the metal layer includes a plurality of island portions containing metal and a sea portion positioned between the island portions, the island portion is a convex quadrangle in a cross-sectional view, one side of the quadrangle being opposed to the base material layer, and 0≤x−y≤80 where a length of a side of the island portion on the base material layer side is x [nm] and a length of a side of the island portion on an opposite side to the base material layer is y [nm].

First claim

The invention claimed is:

1. A metal tone decorative sheet comprising a metal layer on a base material layer, and
a heat-sensitive adhesive layer or a pressure-sensitive adhesive layer on a metal layer side being an opposite side to the base material layer, wherein:
the metal layer comprises a plurality of island portions containing metal and a sea portion positioned between the island portions;
the island portion is a convex quadrangle in a cross-sectional view, one side of the quadrangle being opposed to the base material layer; and
0 nm≤x−y≤80 nm where a length of a side of the island portion on the base material layer side is x, in nm, and a length of a side of the island portion on an opposite side to the base material layer is y, in nm.

2. The metal tone decorative sheet according to claim 1 , wherein a reflectance at a wavelength of 550 nm is 60% or more.

3. The metal tone decorative sheet according to claim 1 ,
wherein the sea portion are filled with a part of the heat-sensitive adhesive layer or the pressure-sensitive adhesive layer, and
the x, in nm, and the y, in nm, satisfy 0 nm<x−y≤80 nm.

4. The metal tone decorative sheet according to claim 3 , wherein the x, in nm, and the y, in nm, satisfy 10 nm≤x−y≤80 nm.

5. The metal tone decorative sheet according to claim 1 , wherein an area ratio of the sea portion when the metal layer is viewed in a plan view is 10% or more and 25% or less.

6. The metal tone decorative sheet according to claim 1 , wherein when each island portion is assumed to be a circle and an average value of the diameter calculated from an area per one island portion is defined as a size of the island portion, the size is 100 nm or more and 300 nm or less.

7. The metal tone decorative sheet according to claim 1 , wherein the metal layer contains indium or tin.

8. A metal tone decorative molded body comprising the metal tone decorative sheet according to claim 1 and an adherend.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Amano Tsuyoshi
• Tokumitsu Atsushi
• Togo Yuki

Classifications

• B44C1/14

  Metallic leaves or foils, e.g. gold leaf · CPC title

• B44C1/105

  comprising an adhesive layer (decalcomania B44C1/16; adhesive tapes C09J7/20) · CPC title

• H01Q1/425

  comprising a metallic grid · CPC title

• H01Q1/3233

  particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems · CPC title

• B05D5/067

  Metallic effect · CPC title