INFRARED-RAY REFLECTIVE FILM

• US 20160047958A1
• Filed: 03/19/2014
• Published: 02/18/2016
• Est. Priority Date: 04/11/2013
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: FUJISAWA, Junichi, OHMORI, Yutaka, WATANABE, Masahiko
• Granted Patent: US 10,007,037 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 15/04 comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 9/00 Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
• CPC Class Codes: G02B 5/0875 the reflecting layers comprising two or more metallic layers
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/26 Reflecting filters G02B5/28 takes precedence

Abstract

An infrared-ray reflective film (100) of the present invention is configured by disposing an infrared reflective layer (20) and a transparent protective layer (30) on a transparent film backing (10) in this order. The infrared reflective layer (20) comprises: a first metal oxide layer (21); a metal layer (25) made of a silver alloy containing silver in an amount of 96 to 99.9 weight%; and a second metal oxide layer (22), which are arranged in this order from the side of the transparent film backing (10), wherein each of the first metal oxide layer (21) and the second metal oxide layer (22) is in direct contact with the metal layer (25). There is no metal layer between the transparent film backing (10) and the infrared reflective layer (20) and between the infrared reflective layer (20) and the transparent protective layer (30). Preferably, the infrared-ray reflective film of the present invention has a visible ray transmittance of 65% or more, a shading coefficient of less than 0.60, and a corrected emissivity as measured from the side of the transparent protective layer of 0.20 or less.

Claims

1-6. -6. (canceled)

7. An infrared-ray reflective film configured by disposing an infrared reflective layer and a transparent protective layer on a transparent film backing in this order, wherein:

the infrared-ray reflective film has a visible ray transmittance of 65% or more, a shading coefficient of less than 0.60, and a corrected emissivity as measured from the side of the transparent protective layer of 0.20 or less;

the infrared reflective layer comprises a first metal oxide layer, a metal layer that is composed of a silver alloy mainly consisting of silver, and a second metal oxide layer, which are arranged in this order from the side of the transparent film backing, wherein each of the first metal oxide layer and the second metal oxide layer is in direct contact with the metal layer; and

the transparent protective layer is made of an organic material;

and wherein there is no metal layer between the transparent film backing and the infrared reflective layer and between the infrared reflective layer and the transparent protective layer.

8. The infrared-ray reflective film as recited in claim 7, wherein the metal layer contains palladium in an amount of 0.1 weight % or more.

9. The infrared-ray reflective film as recited in claim 7, wherein each of the first metal oxide layer and the second metal oxide layer is a zinc oxide-containing, amorphous, composite metal oxide layer.

10. The infrared-ray reflective film as recited in claim 7, wherein each of the first metal oxide layer and the second metal oxide layer is a composite metal oxide layer selected from the group consisting of indium-zinc composite oxide, zinc-tin composite oxide, and indium-tin-zinc composite oxide.

11. The infrared-ray reflective film as recited in claim 7, wherein a change in emissivity of the infrared-ray reflective film after being immersed in a 5 weight % sodium chloride aqueous solution at 50°

C., for 5 days, is 0.05 or less.

12. The infrared-ray reflective film as recited in claim 7, wherein the transparent protective layer is an organic material layer formed by wet coating.