Patent
1987-05-13
1990-01-30
Arnold, Bruce Y.
350104, G02B 5128
Patent
active
048969435
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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Bailey Terry R.
Dickson Arthur D.
Kult Roger R.
Tolliver Howard R.
Arnold Bruce Y.
Callaghan Terry S.
Jordan Robert H.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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