Solar control window film

Details Solar control window film Solar control window film

1986-08-11

1989-01-10

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428209, 428212, 428354, 428430, 428441, 428447, 428458, 428461, 428480, 428483, B32B 514, B32B 702

Patent

active

047973170

ABSTRACT:
A flexible, composite solar control sheet for use on a motor vehicle window has a vignette pattern in the film area above the driver's sight line that, in its darkest area, transmits less than 45% (preferably 10:30%) of visible light, and reflects less than 35% of the visible light; the composite having a first polymeric stratum of oriented polyethylene terephthalate (PET) to a surface of which is applied, by conventional vacuum deposition, a vignette layer of a suitable metal, e.g., 85:15, nickel-chromium alloy, or stainless steel, that in the area above the driver's sightline, transmits less than 45% visible light, and reflects less than 35% visible light; the first stratum being bonded to a second stratum of dye-treated PET which transmits about 35% to 70% visible light, the composite being protected on the exposed surface of the second stratum by a hard coat and containing a UV absorber; the composite then being combined with a motor vehicle window with the first stratum facing the inside surface of the motor vehicle window and the darkest area of the vignette disposed above the driver's sight line. The dye may be put in the laminating adhesive instead of the second stratum. A method of making is disclosed.

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