Optical: systems and elements – Signal reflector – 3-corner retroreflective
Patent
1996-11-08
1998-05-19
Phan, James
Optical: systems and elements
Signal reflector
3-corner retroreflective
359529, 428172, G02B 5124
Patent
active
057543380
ABSTRACT:
The present invention provides a retroreflective sheeting including a structured film having an array of structured elements and a sealing film attached to the structured film by a plurality of rivet-like connections perforating the sealing film. Preferably, the rivet-like connections form flanges. The preferred sealing film is a thermoplastic polymer with a ductile yield of at least about 20%. The retroreflective sheetings according to the present invention can also include a seal coat located on the sealing film. In some embodiments, the seal coat can be prepared from a seal coat precursor comprising radiation curable components. The present invention also includes methods of manufacturing the various embodiments of the retroreflective sheetings.
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Frey Cheryl M.
Wilson Bruce B.
Jordan Robert H.
Minnesota Mining and Manufacturing Company
Phan James
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