Prismatic retroreflective article with fluorine- or...

Details Prismatic retroreflective article with fluorine- or... Prismatic retroreflective article with fluorine- or...

2005-12-28

2008-03-25

Allen, Stephone B. (Department: 2872)

Optical: systems and elements

Signal reflector

3-corner retroreflective

Reexamination Certificate

active

07347571

ABSTRACT:
A prismatic retroreflective article comprising a transparent polymeric body portion having an elastic modulus less than about 13×108pascals, and a layer of internally reflecting open air-exposed cube-corner optical elements having an elastic modulus greater than about 14×108pascals and comprising a polymer having covalently-bound fluorine or silicon. The traditionally-employed rear cover film may be eliminated (thereby reducing cost, weight, stiffness and retroreflectivity loss due to seal leg formation), and retroreflectivity under wet conditions, dirty conditions, or both wet and dirty conditions can be at least partially maintained.

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