Luminous retroreflective sheeting and method for making same

Details Luminous retroreflective sheeting and method for making same Luminous retroreflective sheeting and method for making same

G - Physics

02

B

G02B 5/128 (2006.01) G09F 13/22 (2006.01)

Patent

CA 2310465

Luminous retroreflective sheetings (10) have a transparent cover layer (12), an optical layer (14) disposed beneath the cover layer, and a reflective layer (16). She optical layer includes a first polymer layer (22) and a monolayer of beads (24, 26) at least partially embedded therein. The reflective layer is disposed proximate a focal plane of the monolayer of beads. The monolayer of beads includes transparent beads (24) that, in combination with the reflective layer, retroreflect incident light. The monolayer also includes luminescent beads (26) that emit light under the influence of an applied voltage or ultraviolet (UV) radiation. Processes for making such sheetings are also disclosed.

L'invention concerne des revêtements rétroréfléchissants lumineux (10) comprenant une couche de surface transparente (12), une couche optique (14) placée sous ladite couche de surface, et une couche réfléchissante (16). La couche optique comprend une première couche polymère (22) et une monocouche de perles (24, 26), au moins partiellement enchâssées dans ladite couche. La couche réfléchissante est proche d'un plan focal de la monocouche de perles, laquelle renferme des perles transparentes (24) qui, en combinaison avec la couche réfléchissante, ont une action rétroréfléchissante sur la lumière incidente. Par ailleurs, la monocouche renferme des perles luminescentes (26) capables d'émissions lumineuses sous l'application d'une tension ou sous l'effet d'un rayonnement ultraviolet. L'invention concerne également des procédés relatifs à la fabrication des revêtements de ce type.

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