Fluorescent retroreflective sheet
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United States of America Patent
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Jun 28, 2005
Grant Date -
May 29, 2003
app pub date -
Feb 22, 2001
filing date -
Apr 11, 2000
priority date (Note) -
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Abstract
This invention provides encapsulated type fluorescent retroreflective sheeting which is excellent in appearance and weatherability, and which comprises a surface-protective layer disposed on the side on which light is to strike, a binder layer connected to the surface-protective layer through network bonding parts, an air layer which is sealed-up by the network bonding parts between the surface-protective layer and the binder layer, and a retroreflective element layer disposed between the surface-protective layer and the air layer, or between the binder layer and the air layer, wherein at least one layer located on the light-incident side of sealed-up air layer contains at least one fluorescent dye selected from the group consisting of benzimidazole coumarin type-fluorescent dyes of formula (1) as follows: ##STR1##
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