Process for producing solar control window

Abstract

A solar control film for application to window glass comprises a vapor deposited aluminum coat, which partially transmits light, interposed between a pair of moisture permeable polymeric strata, each of which is self supporting. In one modification, an optional outer coat on one of the polymeric strata is composed of a pressure sensitive adhesive in association with a silicone release sheet. In another modification, an optional outer coat on the other of the polymeric strata is composed of a silicone release agent.

A process for applying a solar control film to window glass, the solar control film comprising a pair of self supporting polyester support strata, a vapor deposited aluminum stratum and an internal bonding stratum interposed therebetween, and an external bonding stratum of pressure sensitive composition on an external face of one of the polyester support strata, the process comprising the steps of applying the solar control film to the window glass with an aqueous liquid therebetween, squeegeeing the solar control film to the window glass and permeating water through the solar control film from the region between it and the window glass.

Description

This is a division of application Ser. No. 113,426, filed Feb. 8, 1971, now U.S. Pat. No. 3,775,226.

BACKGROUND AND SUMMARY

The present invention relates to of a process involving a solar control film, in exaggerated cross section, process involving a solar control film that is less costly, can be more simply stored and transported, more easily applied to a window and more permanently used on interior or exterior window surfaces. Since certain changes may be made in the above disclosure without departing from the scope of the invention thereof, it is intended that all matters shown in the accompanying drawings or described in the foregoing specification be interpreted in an illustrative and not in a limiting sense.

Claims

1. A process for producing a solar control window, said process comprising the steps of superposing a semi-transparent solar control film upon a window surface with an aqueous detergent interposed therebetween, said solar control surface comprising in laminated sequence, an optically clear silicone release stratum, an optically clear polyester support stratum, an optically clear polyester bonding stratum, a semi-transparent vapor deposited aluminum stratum, an optically clear polyester support stratum, and an optically clear pressure sensitive stratum being in contiguity with said window surface, said release stratum being remote from said window surface, squeegeeing said solar control film into intimate contact with said window surface while said pressure sensistive adhesive stratum is deactivated by said aqueous detergent, and permeating said aqueous detergent out of the interface between said pressure sensitive stratum said window surface in order to reactivate said pressure sensitive adhesive stratum.

2. The process of claim 1 wherein said silicone release stratum, said polyester bonding stratum, said polyester support strata and said pressure sensitive adhesive stratum are optically clear.

3. The process of claim 1 wherein said pressure sensitive adhesive stratum is water insoluble.

4. A process for producing a solar control window, said process comprising the steps of superposing a semi-transparent solar control film upon a window surface with an aqueous liquid therebetween, said solar control film comprising a first polyester self-supporting stratum ranging in thickness from 1/4 mil to 1 mil, said first polyester self-supporting stratum being optically clear and transparent to visible light, a second polyester self-supporting stratum ranging in thickness from 1/4 to 1 mil, said second polyester self-supporting stratum being optically clear and transparent to visible light, an inner bonding stratum between the adjacent faces of said first polyester self-supporting stratum and said second polyester self-supporting stratum, said inner bonding stratum being composed of a polymer selected from the class consisting of polyesters and acrylate esters, a vapor deposited aluminum stratum on a face of one of said first self-supporting polyester stratum and said second self-supporting polyester stratum in contact with said inner bonding stratum, said vapor deposited aluminum stratum having a thickness of no more than 300 angstrom units and a visible light transmission ranging from 5 percent to 60 percent, and an outer bonding stratum contacting one of the remote faces of said first self-supporting polyester stratum and said second self-supporting polyester stratum, said outer bonding stratum being tacky, said first polyester self-supporting stratum, said inner bonding stratum, and said vapor deposited aluminum stratum being moisture permeable, at least one of said polyester self-supporting strata containing an ultraviolet light absorbing polymer effective in the range of 200 to 380 nanometers, said inner bonding stratum ranging in thickness from 0.0001 to 0.0003 inch, said outer bonding stratum being an optically clear pressure sensitive stratum and being in contiguity with said window surface, squeegeeing said solar control film into intimate contact with said window surface while said pressure sensitive adhesive stratum is deactivated by said aqueous liquid, and permeating said aqueous liquid out of the interface between said pressure sensitive stratum said window surface in order to reactivate said pressure sensitive adhesive stratum.

5. The flexible solar control film sheet process of claim 4, wherein said outer adhesive stratum is composed of a mixture of natural and synthetic rubbers, a tackifier and an organic solvent.