Transparent films providing a barrier to the transmission of ult

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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525 98, 525240, C08K 322, C08L 2316

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active

053916093

ABSTRACT:
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.

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