Patent Number: 6,166,852

Title: Window film with optical brightener

Abstract: The disclosure of this invention relates to window solar control films and more particularly, to window treatment films that incorporate both an ultraviolet absorber and an optical brightner. The disclosure is concerned primarily with a multi layer film construction and method for the enhancement of the optical properties of window treatment films, by the use of optical brightner in at least one layer component of a multi layer window film. The window solar control film has enhanced the optical properties and absorbs most of the ultraviolet radiation. The subject multilayer film absorbs radiation in the range of 300 to 410 n.m. and does not have an undesirable yellowish tint or hue.

Inventors: Miro; Frank (Tierra Verde, FL)

Assignee: Film Technologies International, Inc.

International Classification: B32B 27/36 (20060101); F21V 9/00 (20060101); B32B 17/06 (20060101); B32B 17/10 (20060101); F21V 9/06 (20060101); F21V 009/06 (); F21V 009/04 ()

Expiration Date: 12/26/2017