Encapsulated-lens retroreflective sheeting having improved cover film.

摘要

An encapsulated-lens retroreflective sheeting comprising a monolayer of lenses (22) partially embedded in a binder layer (26), a specularly reflective layer (24) underlying the lenses, and a cover film (28) sealed to the binder layer along a network of interconnecting lines (36) forming hermetically sealed cells within which the lenses are encapsulated and have an air interface, wherein the cover film comprises polyethylene, or polypropylene, or a copolymer comprising a major portion by weight of at least one of ethylene or propylene and a minor portion by weight of a comonomer. Such a cover film affords high flexibility, improved impact resistance, resistance to moisture absorption, and greater toughness to the retroreflective sheeting. In some embodiments the cover film is multi-layer.