| abstract |
The invention relates to solar energy shielding window film laminates exhibiting visual light transmittance in the range of 5 to 80% with minimum progressive fading or degradation of reflective quality wherein base polyester films have a layer of adhesive sandwiched there between, the adhesive layer containing dispersed mixed metal oxides as solar-energy-screen particles optionally in combination with rare earth hexaborides, antimony containing metal oxide, indium containing metal oxide, titanium nitride, or carbon particles either singly or in combinations thereof. The process for preparation of these laminates involves steps of selecting a polyester (PET) substrate; coating it with an adhesive formulation containing the dispersed mixed metal oxides as solar-energy-screen particles and other additives followed by lamination with a second PET film; applying a UV hard coat layer on one side of the PET film laminate and applying pressure sensitive adhesive on a side opposite the UV hard coat layer of the laminate followed by lamination with a release sheet. |