LUMINOUS RETROREFLECTIVE SHEETING AND METHOD FOR MAKING SAME

摘要

Luminous retroreflective sheetings (10) have a transparent cover layer (12), an optical layer (14) disposed beneath the cover layer, and a reflective layer (16). The 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.