Patent ID: 6391400
Filing Date: 2002-05-21
Classification: B32B,B60J,G02B,Y10T

Abstract:
A glazing assembly comprising:(i) a glazing substrate having at least one face; and, (ii) a thermal control film, juxtaposed adjacent said face, that does not substantially contribute to the accumulation of greenhouse heat in an enclosed space, further comprised of: (a) a thin flexible polymeric sheet having a first face and an opposite second face and a thickness of from 0.1 to 100 mils; and, (b) a multilayer coating adhered to said first face, said coating comprising two or more contiguous alternating layers of comparatively higher and lower index of refraction inorganic dielectric material, which coating has at least two or more layers independently having an optical thickness approximately equal to one quarter of an infrared wavelength, &lgr;0, between 750 and 2000 nm; said thermal control film characterized by an average transmittance of visible radiation of wavelength 380 to 750 nm at 0Â° incidence of at least 50%; said thermal control film further characterized by an average reflectance of infrared radiation in an infrared radiation band which is at least 100 nm wide and falls within the wavelength band 750 to 2000 nm, at 0Â° incidence, of at least 50%; said thermal control film further characterized by an average transmittance of infrared radiation of wavelength 7 to 10 microns at 0Â° incidence of at least 50%, wherein, said thermal control film is used in vehicular glazing or in architectural glazing and allows the transmittance through the film of a majority of the infrared radiation incident upon the thermal control film in the 7 to 20 micron wavelength region that is emitted by interior materials in the enclosed space.