Light-absorbing heat-shielding film, light-absorbing heat-shielding member, article, and method of producing the same

Patent metadata

Field	Value
Publication number	US-2022011475-A1
Application number	US-202117482208-A
Country	US
Kind code	A1
Filing date	Sep 22, 2021
Priority date	Mar 29, 2019
Publication date	Jan 13, 2022
Grant date	—

Abstract

The present disclosure provides a light-absorbing heat-shielding film that achieves usually incompatible characteristics of absorbing visible light and near-infrared rays and emitting less far-infrared rays. The present disclosure provides a light-absorbing heat-shielding film including: a metal layer including fine irregularities, wherein an average height of the fine irregularities is 100 nm or more and 1000 nm or less.

First claim

What is claimed is:

1 . A light-absorbing heat-shielding film comprising:
a metal layer including fine irregularities, wherein an average height of the fine irregularities is 100 nm or more and 1000 nm or less.

2 . The light-absorbing heat-shielding film according to claim 1 , further comprising: a fine irregular shape of a metal oxide that is in close contact with the fine irregularities.

3 . The light-absorbing heat-shielding film according to claim 2 , wherein the fine irregular shape of the metal oxide contains plate-shaped crystals containing alumina as a main component.

4 . The light-absorbing heat-shielding film according to claim 1 , wherein the light-absorbing heat-shielding film has a surface of which an average surface roughness Ra′ is 1 nm or more and 50 nm or less and a specific surface area Sr is 1.0 or more and 3.0 or less.

5 . The light-absorbing heat-shielding film according to claim 1 , wherein a material of the metal layer includes one selected from nickel, chromium, and zinc.

6 . A light-absorbing heat-shielding member comprising:
the light-absorbing heat-shielding film according to claim 1 ; and a substrate.

7 . The light-absorbing heat-shielding member according to claim 6 ,
wherein the light-absorbing heat-shielding film and the substrate are bonded together with an adhesive layer.

8 . An article comprising: the light-absorbing heat-shielding film according to claim 1 on an outermost surface thereof.

9 . A method of producing a light-absorbing heat-shielding film, comprising:
a first step of forming a fine irregular shape of a metal oxide; and a second step of forming a metal layer on the fine irregular shape of the metal oxide.

10 . The method of producing a light-absorbing heat-shielding film according to claim 9 , wherein the first step includes subjecting a film containing aluminum to immersion treatment in warm water.

11 . The method of producing a light-absorbing heat-shielding film according to claim 9 , further comprising: a step of removing the fine irregular shape of the metal oxide.

12 . A method of producing a light-absorbing heat-shielding member, comprising:
a first step of forming a fine irregular shape of a metal oxide; a second step of forming a metal layer on the fine irregular shape of the metal oxide; and a third step of bonding a substrate to a surface of the metal layer opposite to the fine irregular shape of the metal oxide.

13 . The method of producing a light-absorbing heat-shielding member according to claim 12 , wherein the third step further includes a step of bonding the metal layer and the substrate using an adhesive layer.

14 . The method of producing a light-absorbing heat-shielding member according to claim 12 , further comprising: a step of removing the fine irregular shape of the metal oxide.

15 . The article according to claim 8 , wherein a detected temperature on a surface of the light-absorbing heat-shielding film opposite to a surface in contact with the article is lower by 3° C. or more than a detected temperature on a part of the article not provided with the light-absorbing heat-shielding film.

16 . The article according to claim 15 , wherein the article is a heating element.

17 . Use of the light-absorbing heat-shielding film according to claim 1 , wherein by providing the light-absorbing heat-shielding film on an outermost surface of an article, a detected temperature of a surface of the light-absorbing heat-shielding film opposite to a surface in contact with the article is lower by 3° C. or more than a detected temperature on a surface of the article.

18 . The use according to claim 17 , wherein the article is a heating element.

Assignees

• Canon Kk

Inventors

• Kotani Yoshinori
• Saito Hiroshi

Classifications

• B32B2307/40

  having particular optical properties · CPC title

• B32B2307/304

  Insulating · CPC title

• B32B2037/243

  Coating · CPC title

• C23C18/1216

  Metal oxides (C23C18/1212 takes precedence) · CPC title

• C23C18/1653

  Two or more layers with at least one layer obtained by electroless plating and one layer obtained by electroplating · CPC title