Encapsulated-lens retroreflective sheeting having improved...

Details Encapsulated-lens retroreflective sheeting having improved... Encapsulated-lens retroreflective sheeting having improved...

G - Physics

02

B

18/107, 240/150

G02B 5/128 (2006.01) B29D 11/00 (2006.01)

Patent

CA 1286068

Abstract An encapsulated-lens retroreflective sheeting comprising a monolayer of lenses partially embedded in a binder layer, a specularly reflective layer underlying the lenses, and a cover film sealed to the binder layer along a network of interconnecting lines 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.

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