G - Physics – 02 – B
Patent
G - Physics
02
B
400/3012, 400/74
G02B 5/124 (2006.01) B05D 5/06 (2006.01) B05D 7/26 (2006.01)
Patent
CA 1276046
RETROREFLECTIVE SHEETING AND METHODS FOR MAKING SAME ABSTRACT OF THE DISCLOSURE A retroreflective relatively flexible laminate sheet construction has a thermoplastic web with a smooth light-receiving first side and a second side coextensive with said first side. A retroreflective pattern is formed on the second side. A slurry of granular material is deposited on the second side to cover selected portions of the formed pattern with remaining portions of the formed pattern devoid of the granular material, and said slurry is dried or cured to produce a well-defined pattern. A layer of backcoating material is deposited on the second side to overlay the granular material, the backcoating material contacting the thermoplastic web where no granular material has been deposited, thereby encapsulating the granular material between the second side and the backcoating layer. An added, outer layer provides additional weather protection for the thermoplastic web. Methods are detailed to manufacture the laminate, and compositions of backcoating mixtures also are disclosed. The backcoating mixture includes a water- borne emulsion of an acrylic/urethane copolymer, a whitening agent, a defoamer, an acrylic-based thickening agent and a pH-adjusting agent.
586270
Pricone Robert M.
Roberts William N.
Finlayson & Singlehurst
Stimsonite Corporation
LandOfFree
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