Multilayer structure

Patent metadata

Field	Value
Publication number	US-11360249-B2
Application number	US-202117337436-A
Country	US
Kind code	B2
Filing date	Jun 3, 2021
Priority date	Dec 4, 2018
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

Provided is a multilayer structure including a radiator, a base material layer that includes a region forming an interface in an internal structure, and a first air layer that is provided between the radiator and the base material layer, in which a far-infrared transmittance B of the base material layer and a solar light reflectance A of the multilayer structure satisfy B/(100−A)>7, and a solar light reflectance C of the base material layer is 30% or more.

First claim

What is claimed is:

1. A multilayer structure comprising:
a radiator;
a base material layer that includes a region forming an interface in an internal structure; and
a first air layer that is provided between the radiator and the base material layer,
wherein a far-infrared transmittance B of the base material layer and a solar light reflectance A of the multilayer structure satisfy B/(100−A) >7,
a solar light reflectance C of the base material layer is 30% or more,
the base material layer is a non-woven fabric or a resin film containing particles,
in a case in which the base material layer is the non-woven fabric, the region forming the interface in the internal structure comprises voids forming a solid-gas interface with fibers of the non-woven fabric, and
in a case in which the base material layer is the resin film containing the particles, the region forming the interface in the internal structure comprises the particles forming a solid-solid interface with the resin.

2. The multilayer structure according to claim 1 ,
wherein the far-infrared transmittance B of the base material layer and the solar light reflectance C of the base material layer satisfy B/(100−C)>7.

3. The multilayer structure according to claim 1 ,
wherein the number of the base material layers is two or more.

4. The multilayer structure according to claim 3 , further comprising:
a second air layer that is provided between the base material layers.

5. The multilayer structure according to claim 4 ,
wherein a thickness of the second air layer is 5 cm or less.

6. The multilayer structure according to claim 1 ,
wherein the far-infrared transmittance B of the base material layer and the solar light reflectance A of the multilayer structure satisfy B/(100−A)>20.

7. The multilayer structure according to claim 1 ,
wherein the solar light reflectance C of the base material layer is 80% or more.

8. The multilayer structure according to claim 1 ,
wherein an average diameter of the region forming the interface in the internal structure is 5000 nm or less.

9. The multilayer structure according to claim 1 ,
wherein the region forming the interface in the internal structure is at least one selected from a void or a particle.

10. The multilayer structure according to claim 1 ,
wherein the base material layer is a porous base material layer.

11. The multilayer structure according to claim 1 ,
wherein a void volume of the base material layer is 40% or more.

12. The multilayer structure according to claim 1 ,
wherein the base material layer contains polyolefin.

13. The multilayer structure according to claim 1 ,
wherein the multilayer structure is a radiative cooling structure.

Assignees

• Fujifilm Corp

Inventors

• Yasuda Hideki

Classifications

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title

• B32B7/023

  Optical properties · CPC title

• G02B5/26

  Reflecting filters (G02B5/28 takes precedence) · CPC title

• G02B5/208 Primary

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• B32B3/26

  characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids {(foam layer B32B5/18; layer of synthetic resin characterised by fillers that create voids or cavities B32B27/205); characterised by an apertured layer} · CPC title