Fluorescent article having multiple layers
First Claim
Patent Images
1. A fluorescent article comprising:
- an underlayer colored fluorescent film that includes a first fluorescent colorant in an underlayer polymer matrix;
an overlayer colored fluorescent film provided over the underlayer film, the overlayer film including a second fluorescent colorant in an overlayer polymer matrix, the second fluorescent colorant at least partially blocking light in a first wavelength range while allowing transmission of an amount of light in a second wavelength range effective to make the first fluorescent colorant fluoresce;
the underlayer having a greater fluorescent color stability than the overlayer;
a retroreflective layer including a plurality of retroreflective elements beneath the overlayer and the underlayer; and
a cap layer overlying the overlayer.
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Abstract
A fluorescent article includes an underlayer colored fluorescent film and an overlayer colored fluorescent film, which is provided over the underlayer colored fluorescent film. The underlayer colored fluorescent film includes a first fluorescent colorant in an underlayer polymer matrix. The overlayer colored fluorescent film includes a second fluorescent colorant in an overlayer polymer matrix. The second fluorescent colorant in the overlayer film at least partially blocks light in a first wavelength range while allowing transmission of an amount of light in a second wavelength range effective to make the first fluorescent colorant fluoresce.
44 Citations
24 Claims
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1. A fluorescent article comprising:
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an underlayer colored fluorescent film that includes a first fluorescent colorant in an underlayer polymer matrix; an overlayer colored fluorescent film provided over the underlayer film, the overlayer film including a second fluorescent colorant in an overlayer polymer matrix, the second fluorescent colorant at least partially blocking light in a first wavelength range while allowing transmission of an amount of light in a second wavelength range effective to make the first fluorescent colorant fluoresce; the underlayer having a greater fluorescent color stability than the overlayer; a retroreflective layer including a plurality of retroreflective elements beneath the overlayer and the underlayer; and a cap layer overlying the overlayer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A fluorescent yellow article comprising:
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an underlayer fluorescent yellow-green film that includes at least one colored fluorescent dye dissolved within an underlayer polymer matrix; an overlayer fluorescent orange film provided over the underlayer film, the overlayer film including at least one colored fluorescent dye dissolved within an overlayer polymer matrix; the underlayer having a greater fluorescent color stability than the overlayer; a retroreflective layer including a plurality of retroreflective elements beneath the overlayer and the underlayer; and a cap layer overlying the overlayer. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A fluorescent yellow retroreflective article comprising:
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an underlayer fluorescent yellow-green film that includes at least one colored fluorescent dye dissolved in a underlayer polymer matrix, the underlayer polymer matrix including a polycarbonate; and an overlayer fluorescent orange film provided over the underlayer film, the over layer film including at least one colored fluorescent dye dissolved in an overlayer polymer matrix, the overlayer polymer matrix including an acrylic resin; the underlayer having a greater fluorescent color stability than the overlayer; a retroreflective layer including a plurality of retroreflective elements beneath the underlayer and the overlayer; and a cap layer overlying the overlayer. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification