Fluorescent red-orange retroreflective sheeting
Assignee3M Innovative Properties Company
InventorOsei A. Owusu
Life of this patent
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Abstract
A fluorescent red-orange retroreflective article includes a polymeric matrix and at least one fluorescent dye added in an amount that provides the article with a red-orange color under daytime lighting conditions. The article also includes cube corner elements disposed at a back side of the polymeric matrix. The article can exhibit a retroreflectivity of at least 350 or 500 cd/(lux·m2), and a brightness Y of at least 20, 30, or 35. The article can exhibit a color within a preferred red-orange color space bounded by CIE chromaticity coordinates (0.560, 0.380), (0.580, 0.355), (0.633, 0.366) and (0.610, 0.390).
Claims15
A fluorescent red-orange retroreflective article, comprising:
- a polymeric matrix;
- at least one fluorescent dye added to the polymeric matrix in an amount sufficient to provide the article with a red-orange color under daytime lighting conditions;
- and
- retroreflective elements disposed to receive light that has passed through the polymeric matrix;
- wherein the article has an average retroreflectivity of at least 350 cd/(lux·m2) and a luminance factor Y of at least 20.
A fluorescent red-orange retroreflective article, comprising:
- a polymeric matrix;
- at least one fluorescent dye added to the polymeric matrix in an amount sufficient to provide the article with a red-orange color under daytime lighting conditions;
- and retroreflective elements disposed to receive light that has passed through the polymeric matrix;
- wherein the red-orange color has CIE chromaticity coordinates (x,y) within a color space bounded by CIE chromaticity coordinates (0.560, 0.380), (0.580, 0.355), (0.633, 0.366) and (0.610, 0.390);
- and
- wherein the article has an average retroreflectivity of at least 350 cd/(lux·m2) and a luminance factor Y of at least 30.
Dependencies are inferred from the claim text.