Patent ID: 8088848

Claim:
A transparent polypropylene film comprising: at least a first and a second ultraviolet (UV)-absorbing additive for improving transparent film optical properties by reducing haziness; wherein said first additive comprises a non-aggregated inorganic material; wherein said first additive is present in the film in an amount ranging from 0.1% to 5.0% by weight; wherein said second additive comprises an organic material selected from the group consisting of triazines, hindered amines, oxanilides, cyanoacrylates, benzotriazoles and benzophenones; wherein said second additive is present in the film in an amount less than 2.0% by weight; wherein said second additive comprises benzotriazole and benzophenone; wherein the ratio of said benzotriazole to said benzophenone is greater than 0.5; and wherein at the point of maximum transmittance of UV light between 220 and 350 nm the film transmits no more than 30% of the UV light incident upon the film at the wavelength of the said maximum transmittance.