Weatherable multilayer film
AssigneeSaint-Gobain Performance Plastics Corporation
InventorsGwo Swei, Viktor Skatchkov, Kevin Hetzler
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Abstract
A multilayer polymer film includes first and second polymer layers. The first polymer layer includes a first ultraviolet radiation absorber. The second polymer layer overlies the first polymer layer and includes a second ultraviolet radiation absorber. The first ultraviolet radiation absorber has a peak absorbtivity wavelength less than 300 nm and the second ultraviolet radiation absorber has a peak absorbtivity wavelength greater than 300 nm.
Claims40
A multilayer polymer film comprising:
- a first polymer layer comprising a first ultraviolet radiation absorber;
- and
- a second polymer layer overlying the first polymer layer and comprising a second ultraviolet radiation absorber, wherein the first ultraviolet radiation absorber has a peak absorbtivity wavelength less than 300 nm and the second ultraviolet radiation absorber has a peak absorbtivity wavelength greater than 300 nm.
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A multilayer polymer film comprising:
- a first polymer layer including fluoropolymer;
- a second polymer layer including acrylic polymer and at least two ultraviolet radiation absorbers;
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- wherein the multilayer polymer film has an absorbance of at least about 4.0 for electromagnetic radiation having a wavelength of about 250 nm and an absorbance of at least about 4.0 for electromagnetic radiation having a wavelength of about 315 nm.
A multilayer polymer film comprising a first polymer layer comprising polyvinylidene fluoride, the multilayer polymer film having a haze not greater than 7.0% and having an absorbance at least about 3.5 for electromagnetic radiation having wavelengths between 200 nm and 350 nm.
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A multilayer polymeric film comprising:
- a first polymer layer comprising a first ultraviolet radiation absorber;
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- a second polymer layer overlying the first polymer layer and comprising a second ultraviolet radiation absorber, the first ultraviolet radiation absorber being different from the second ultraviolet radiation absorber.
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Dependencies are inferred from the claim text.