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US 5,510,178 AGranted
Transfer article for forming tetroreflective and colored images and method of making same
AssigneeMinnesota Mining and Manufacturing Company
InventorsUlf N. Olsen, Erik Franke, Eilif Strand
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Abstract
A transfer with durable images comprising a support sheet having a monolayer of transparent microspheres that are partially embedded in the support sheet with a specularly reflecting layer covering the parts of the surfaces of the microspheres which are exposed above the support sheet. One or more coatings of two-component colors can be printed imagewise on top of the layer of microspheres. The two-component colors are based on polyester resin and an isocyanate hardener.
Claims12
A transfer for placing a retroreflective article on a substrate, which transfer comprises:
- (a) a support sheet;
- (b) a monolayer of transparent microspheres embedded about one-fourth to about one-half their diameter in the support sheet;
- (c) a specularly reflecting layer disposed on the portion of the microspheres that protrudes from the support sheet;
- and
- (d) an imagewise coating applied over the specularly reflecting layer, the imagewise coating being based on a polyester resin and an isocyanate.
2 more elements
Dependencies are inferred from the claim text.