High-angularity retroreflective sheeting and method for manufact

Details High-angularity retroreflective sheeting and method for manufact High-angularity retroreflective sheeting and method for manufact

1983-04-11

1985-03-19

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

350105, 156276, 427163, 427204, 428325, 428344, 428913, 428161, G02B 5128, B32B 300

Patent

active

045059675

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.

REFERENCES:
patent: 3702213 (1972-11-01), Schwab
patent: 3795435 (1974-03-01), Schwab
patent: 4104102 (1978-08-01), Eagon et al.
patent: 4226658 (1980-10-01), Carlson et al.
patent: 4348312 (1982-09-01), Tung
patent: 4367920 (1983-01-01), Tung et al.
patent: 4377988 (1983-03-01), Tung et al.

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