Enhanced heat mirror films
First Claim
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1. A process for making a film comprising:
- a) providing a visible light-transmissive birefringent dielectric multilayer support that reflects at least 50% of light in a band at least 100 nm wide in a wavelength region of interest, andb) forming in either order atop the support;
i) a visible light-transmissive metal or metal alloy layer, andii) a crosslinked polymeric layer,whereby the thickness of the metal or metal alloy layer is such that the film is at least about 20% visible light-transmissive and its reflection band is broadened with respect to that of the support.
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Abstract
A heat mirror film containing visible light-transmissive and infrared reflective film comprising a birefringent dielectric multilayer support that reflects at least 50% of light in a band at least 100 nm wide in a wavelength region of interest, a metal or metal alloy layer whose thickness is such that the film is visible light-transmissive and its reflection band is broadened, and a crosslinked polymeric layer has improved infrared reflecting properties. The film can be joined or laminated into glazing (especially non-planar vehicular safety glazing) with reduced likelihood that the metal or metal alloy layer will be damaged or distorted.
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Citations
46 Claims
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1. A process for making a film comprising:
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a) providing a visible light-transmissive birefringent dielectric multilayer support that reflects at least 50% of light in a band at least 100 nm wide in a wavelength region of interest, and b) forming in either order atop the support; i) a visible light-transmissive metal or metal alloy layer, and ii) a crosslinked polymeric layer, whereby the thickness of the metal or metal alloy layer is such that the film is at least about 20% visible light-transmissive and its reflection band is broadened with respect to that of the support. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A process for making a glazing article comprising:
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a) assembling a layer of glazing material and a film comprising a birefringent dielectric multilayer support that reflects at least 50% of light in a band at least 100 nm wide in a wavelength region of interest and which has atop the support in either order a crosslinked polymeric layer and a metal or metal alloy layer whose thickness is such that the film is at least about 20% visible light-transmissive and its reflection band is broadened, and b) bonding the glazing material and film together into a unitary article. - View Dependent Claims (15)
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16. A process for making a laminate article comprising:
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a) assembling; i) a first layer of a glazing material, ii) a first mechanical energy-absorbing layer, iii) a visible light-transmissive and infrared-reflective film comprising a birefringent dielectric multilayer support that reflects at least 50% of light in a band at least 100 nm wide in a wavelength region of interest and which has atop the support in either order a crosslinked polymeric layer and a metal or metal alloy layer whose thickness is such that the film is at least about 20% visible light-transmissive and its reflection band is broadened, iv) a second mechanical energy-absorbing layer and v) a second layer of gazing material,
so that the film is between the first and second mechanical energy-absorbing layers and the first and second mechanical energy-absorbing layers are between the first and second layers of glazing material,b) removing residual air from between the layers, and c) beating and applying pressure to bond the layers together into a unitary article. - View Dependent Claims (17, 18, 19, 20, 21)
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- 22. A film comprising a birefringent dielectric multilayer support that reflects at least 50% of light in a band at least 100 nm wide in a wavelength region of interest and which has atop the support in either order a crosslinked polymeric layer and a metal or metal alloy layer whose thickness is such that the film is at least about 20% visible light-transmissive and its reflection band is broadened with respect to that of the support.
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34. A safety glazing pre-laminate comprising at least one layer of a mechanical energy-absorbing material joined to a visible light-transmissive and infrared-reflective film comprising a birefringent dielectric multilayer support that reflects at least 50% of light in a band at least 100 nm wide in a wavelength region of interest and which has atop the support in either order a crosslinked polymeric layer and a metal or metal alloy layer whose thickness is such that the film is at least about 20% visible light-transmissive and its reflection band is broadened with respect to tat of the support.
- 35. A glazing article comprising at least one layer of glazing material joined to a visible light-transmissive and infrared-reflective film comprising a birefringent dielectric multilayer support that reflects at least 50% of light in a band at least 100 nm wide in a wavelength region of interest id which has atop the support in either order a crosslinked polymeric layer and a metal or metal alloy layer whose thickness is such that the film is at least about 20% visible light-transmissive and its reflection band is broadened wit respect to that of the support.
- 45. A vehicle with glazing comprising at least one windshield, backlight, side window or skylight comprising a visible light-transmissive and infrared reflective film comprising a birefringent dielectric multilayer support that reflects at least 50% of light in a band at least 100 nm wide in a wavelength region of interest and which has atop the support in either order a crosslinked polymeric layer and a metal or metal alloy layer whose thickness is such that the film is at least about 20% visible light-transmissive and its reflection band is broadened with respect to that of the support.
Specification