Method for making flexible retroreflective sheet material

Details Method for making flexible retroreflective sheet material Method for making flexible retroreflective sheet material

G - Physics

02

B

240/151, 154/78,

G02B 5/124 (2006.01) B32B 3/30 (2006.01) D06Q 1/10 (2006.01) B29C 65/08 (2006.01)

Patent

CA 2040711

A flexible retroreflective sheet material is formed by adhering a first face of a first flexible synthetic resin sheet material to a synthetic resin second sheet material by a first adhesive which preferentially adheres to the second sheet material. On the second face of said first sheet material are thereafter formed closely spaced retroreflective microprisms having a height of 0.001-0.010 inches. A second adhesive is applied to the second face of said first sheet and firmly engages therewith. A flexible backing material is adhered to the second adhesive over the second face. Lastly, the second sheet material and first adhesive are stripped from the first sheet material to produce a firmly bonded flexible composite sheet material comprised of the adhesively bonded first sheet material and backing material. The retroreflective microprisms may be coated with a reflective metal deposit or surrounded by air to provide a retroreflective interface.

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