Ultraviolet reflecting compositions
First Claim
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1. A fluid treatment system comprising:
- an article of manufacture having an ultraviolet reflective surface, the ultraviolet reflective surface formed at least in part from a thermoplastic material containing from about 0.5% to about 5% UV reflective microparticles, the ultraviolet reflecting surface having a reflectivity of at least 30% of ultraviolet radiation at a wavelength of 254 nm.
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Abstract
Thermoplastic compositions that reflect ultraviolet light are provided herein, along with articles of manufacture and methods of fluid purification using the same. The thermoplastic compositions preferably comprise a suitable thermoplastic material and microparticles of UV reflective material, such as aluminum or stainless steel. The thermoplastic compositions are useful, for example, in forming articles of manufacture comprising a UV reflective surface that are suitable for use in a water treatment system in connection with a UV light source.
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Citations
20 Claims
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1. A fluid treatment system comprising:
- an article of manufacture having an ultraviolet reflective surface, the ultraviolet reflective surface formed at least in part from a thermoplastic material containing from about 0.5% to about 5% UV reflective microparticles, the ultraviolet reflecting surface having a reflectivity of at least 30% of ultraviolet radiation at a wavelength of 254 nm.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19)
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16. A water treatment system comprising:
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a. a water conduit having an interior surface, where at least a portion of the interior surface is an ultraviolet reflective surface formed at least in part from a thermoplastic material containing from about 0.5% to about 5% aluminum microparticles, the ultraviolet reflecting surface having a reflectivity of at least 30% of ultraviolet light having a wavelength of 254 nm; b. a UV radiation source positioned within the water conduit, the UV radiation source comprising an ultraviolet radiation emitting source having an energized state and configured to emit ultraviolet light when the UV radiation source is in the energized state, where the emitted ultraviolet light includes light at a wavelength of 254 nm.
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20. A water treatment system comprising:
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a. a water conduit having an interior surface, where at least a portion of the interior surface is an ultraviolet reflective surface formed at least in part from a polypropylene containing from about 1% to about 2% aluminum microparticles having an average size of between about 15 μ
m and about 55 μ
m, the ultraviolet reflecting surface characterized by a reflectivity of at least 30% of ultraviolet light having a wavelength of 254 nm;b. a UV radiation source positioned within the water conduit, the UV radiation source comprising an ultraviolet emitting light source having an energized state and emitting ultraviolet light when the UV radiation source is in the energized state, where the emitted ultraviolet light includes light at a wavelength of 254 nm.
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Specification