Retroreflective elements and articles
Assignee3M Innovative Properties Company
InventorsRebecca A. Shipman, Craig S. Chamberlain, James D. Heininger, Thomas P. Hedblom, Douglas E. Weiss, Gerald S. Deeb
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Abstract
The present invention relates to retroreflective elements and retroreflective articles such as pavement markings comprising retroreflective elements, methods of making retroreflective elements, and laminates.
Claims12
A pavement marking comprising retroreflective elements having an exposed outer viewing surface comprising optical elements having approximately the same refractive index partially embedded in a binder wherein the coefficient of retroreflected luminance of the pavement marking is at least 2000 mcd/m2/lux when dry and at least 1500 mcd/m2/lux when wet.
Dependencies are inferred from the claim text.