Infrared reflecting film
AssigneeSaint-Gobain Performance Plastics Corporation
InventorAntoine Diguet
Life of this patent
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Abstract
The invention relates to an infrared reflecting film comprising a flexible polymer substrate; a heat-mirror stack on the substrate, said heat-mirror stack comprising a first dielectric oxide layer, a second dielectric oxide layer and a silver-containing layer between the first and second dielectric oxide layers; and an optical stack on the heat mirror stack, said optical stack comprising alternating layers of at least one layer of a first type and at least one layer of a second type, wherein each layer of the first type has a refractive index measured at 550 nm of 1.6 or less and each layer of the second type has a refractive index measured at 550 nm of 2.3 or more.
Claims8
An infrared reflecting film comprising:
- a flexible polymer substrate;
- a heat-mirror stack on the substrate, said heat-mirror stack comprising a first dielectric oxide layer contacting the substrate, a blocking layer contacting the first dielectric oxide layer, a silver-containing layer contacting the blocking layer, and a second dielectric oxide layers overlying the silver-containing layer, wherein the silver-containing layer has a physical thickness from 12 nm to 20 nm, wherein each of the first and second dielectric oxide layers have a thickness from 20 to 60 nm, wherein the blocking layer comprises gold, or an alloy thereof, and wherein the blocking layer has a thickness of from 0.1 nm to 2 nm;
- and
- an optical stack on the heat mirror stack, said optical stack comprising at least two stacks of alternating layers, wherein each stack of alternating layers consists of one layer of a first type and one layer of a second type, wherein each layer of the first type has a refractive index measured at 550 nm of 1.6 or less and each layer of the second type has a refractive index measured at 550 nm of 2.3 or more, wherein each layer of the second type has a thickness from 50 to 120 nm,
- wherein the infrared reflecting film has a visible light transmission of 70% or more and a visible light reflectance of 14% or less.
A glazing comprising an infrared reflecting film, wherein the infrared reflecting film comprises:
- a flexible polymer substrate;
- a heat-mirror stack on the substrate, said heat-mirror stack comprising a first dielectric oxide layer contacting the substrate, a silver-containing layer contacting the first dielectric oxide layer, a blocking layer contacting the silver-containing layer, and a second dielectric oxide layers contacting the blocking layer, wherein the silver-containing layer has a physical thickness from 12 nm to 20 nm, wherein each of the first and second dielectric oxide layers have a thickness from 20 to 60 nm, wherein the blocking layer comprises gold, or an alloy thereof, and wherein the blocking layer has a thickness of from 0.1 nm to 2 nm;
- and
- an optical stack on the heat mirror stack, said optical stack comprising at least two stacks of alternating layers, wherein each stack of alternating layers consists of one layer of a first type and one layer of a second type, wherein each layer of the first type has a refractive index measured at 550 nm of 1.6 or less and each layer of the second type has a refractive index measured at 550 nm of 2.3 or more, wherein each layer of the second type has a thickness from 50 to 120 nm
- wherein the infrared reflecting film has a visible light transmission of 70% or more and a visible light reflectance of 14% or less.
Dependencies are inferred from the claim text.