Retroreflective security laminates with protective cover sheets

Details Retroreflective security laminates with protective cover sheets Retroreflective security laminates with protective cover sheets

1990-06-08

1992-01-14

Arnold, Bruce Y.

Optical: systems and elements

Signal reflector

Including a curved refracting surface

359534, 428204, 283 85, G02B 5128, B32B 714

Patent

active

050804634

ABSTRACT:
A retroreflective security laminate, designed to be applied to the surface of a document over information thereon, and having a protective cover sheet comprising an abrasion-resistant outer layer and a support layer which is resistant to deformation under localized pressure. Also methods for making such laminates.

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patent: 4808471 (1989-02-01), Grunzinger
ASTM D-1474-85, pp. 175-178, Jun., 1985.
ASTM D-1044-85, Standard Test Method for Resistance of Transparent Plastics to Surface Abrasion.

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