TRANSPARENT FILMS PROVIDING A BARRIER TO THE TRANSMISSION OF ULTRA-VIOLET LIGHT

摘要

A transparent polymeric film that provides a barrier to the transmission of ultra-violet light. The film results from the addition of titanium dioxide particles having an average particle size less than the wavelength of visible light, yet greater than the wavelength of ultra-violet light, to a polymeric material capable of being formed as a transparent film. More specifically, the titanium dioxide particles have an average size on the order of from about 0.010 .mu.m to 0.050 .mu.m and, preferably, from about 0.018 .mu.m to 0.040 .mu.m.