Low emissivity window films
First Claim
1. A solar control film having low emissivity and high visible light transmission comprising:
- a flexible transparent substrate bearing on one surface thereofa thin film layer of reflective metal,a thin film layer of protective material having its major absorption outside the visible range and away from 10 microns covering the layer of metal, anda thin film layer of scratch and wear resistant hard coat material covering the layer of protective material,said film being devoid of laminations and laminating adhesive and having an emissivity of about 0.30 or less and a visible light transmission of up to about 50% or more.
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Accused Products
Abstract
A solar control window film having low emissivity minimizes the transfer of thermal energy through window glass by thermal radiation between a temperature controlled interior environment and a uncontrolled exterior environment. The film is comprised of a transparent flexible polymeric substrate bearing various transparent thin film layers of coating materials, including a highly reflective metal. The film is devoid of laminations and laminating adhesives and provides high visual light transmission of up to 50% or more while maintaining a very low emissivity of 0.30 or less. The film is especially suited for retrofitting existing plain glass windows to convert the same to solar control windows.
207 Citations
14 Claims
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1. A solar control film having low emissivity and high visible light transmission comprising:
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a flexible transparent substrate bearing on one surface thereof a thin film layer of reflective metal, a thin film layer of protective material having its major absorption outside the visible range and away from 10 microns covering the layer of metal, and a thin film layer of scratch and wear resistant hard coat material covering the layer of protective material, said film being devoid of laminations and laminating adhesive and having an emissivity of about 0.30 or less and a visible light transmission of up to about 50% or more. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A solar control film having low emissivity and high visible light transmission comprising
a flexible transparent polymeric substrate bearing a thin film layer of reflective metal a thin film layer of protective material covering the metal layer and comprising a polyester resin based material of low molecular weight having its major absorption outside the visible range and outside the range of 8-12 microns, and a thin film layer of scratch and wear resistant hard coat material covering the layer of protective material, said film being devoid of laminations and laminating adhesive and having an emissivity of about 0.30 or less and a visible light transmission of up to about 50% or more.
Specification