Fluorescent articles having multiple film layers
First Claim
1. A retroreflective sheeting article comprising:
- an underlayer colored fluorescent film having at least one fluorescent dye within an underlayer polymer matrix;
an overlayer colored fluorescent film having at least one fluorescent dye within an overlayer polymer matrix, said at least one fluorescent dye in one said film is different from any fluorescent dye in the other said film, and said overlayer colored fluorescent film has greater UV light stability than said underlayer colored film;
the article has retroreflective members, said overlayer colored fluorescent film being over said underlayer colored fluorescent film and said overlayer polymer matrix being different from said underlayer polymer matrix; and
said article has a selected fluorescent coloration different from both said underlayer colored fluorescent film and said overlayer colored fluorescent film.
1 Assignment
0 Petitions
Accused Products
Abstract
Articles are provided which have fluorescent properties and which are suitable for use in making retroreflective articles such as safety and informational signage. The articles have at least two film layers, each film layer including a colorant dye. The multiple film layer sheeting exhibits excellent resistance to weathering and overall color durability while also providing chromaticity properties dictated by industry standards for a particular coloration. A method of preparing the articles is provided. In a particular application, the articles embody retroreflective properties and are informational for safety signage articles such as pedestrian crossing and school safety fluorescent yellow green signs.
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Citations
55 Claims
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1. A retroreflective sheeting article comprising:
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an underlayer colored fluorescent film having at least one fluorescent dye within an underlayer polymer matrix; an overlayer colored fluorescent film having at least one fluorescent dye within an overlayer polymer matrix, said at least one fluorescent dye in one said film is different from any fluorescent dye in the other said film, and said overlayer colored fluorescent film has greater UV light stability than said underlayer colored film; the article has retroreflective members, said overlayer colored fluorescent film being over said underlayer colored fluorescent film and said overlayer polymer matrix being different from said underlayer polymer matrix; and said article has a selected fluorescent coloration different from both said underlayer colored fluorescent film and said overlayer colored fluorescent film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. An article having retroreflective sheeting with fluorescent coloration, comprising:
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an underlayer colored film having at least one fluorescent dye within an underlayer polymer matrix; an overlayer colored film having at least one fluorescent dye within an overlayer polymer matrix, said overlayer polymer matrix being different from said underlayer polymer matrix and having been formed from an acrylic resin, a polyarylate resin, a copolyestercarbonate, or combinations or copolymers thereof; said overlayer colored film overlies said underlayer colored film; the article has retroreflective members; and said at least one dye in said one film is different from any dye in the other film, the article has a selected fluorescent coloration different from the coloration of either said underlayer colored film or said overlayer colored film, and said overlayer colored film exhibits UV light screening properties in excess of any light screening properties of said underlayer colored film. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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Specification