Tamper resistant security film

Details Tamper resistant security film Tamper resistant security film

C - Chemistry, Metallurgy

09

J

117/6

C09J 7/02 (2006.01) G02B 5/128 (2006.01) G09F 3/02 (2006.01)

Patent

CA 1244724

Abstract of the Disclosure Security film (10, 101) comprising a monolayer of transparent microspheres (11) supported in a thin layer of binder material (12), a pressure-sensitive adhesive layer (15) coated on the layer of binder material, and at least one patterned layer (16, 17) disposed between the pressure-sensitive adhesive and binder layers. The patterned layer (16, 17) has differential adhesion to the pressure-sensitive adhesive layer (15) and the binder layer (12). Upon attempted elevated-temperature removal of the film from a substrate, the film splits, with part of the film remaining on the substrate and part being removed.

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