High-angularity retroreflective sheeting and method for manufacture
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United States of America Patent
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Mar 19, 1985
Grant Date -
N/A
app pub date -
Apr 11, 1983
filing date -
Apr 11, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A new embedded-lens retroreflective sheeting which exhibits superior properties, including superior angularity, and which is made by a new method of manufacture involving lamination techniques. Microspheres are embedded into a first polymeric layer to less than one-half the average diameter of the microspheres, and a pre-formed spacing film is laminated to the microsphere covered surface of the first layer so as to obtain conformation of the spacing film in a substantially constant thickness over a useful portion of the back surface of the microspheres.
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