Security document and method of producing it
AssigneeGiesecke & Devrient GmbH
InventorsWittich Kaule, Gregor Grauvogl
Life of this patent
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Abstract
A transfer foil for use in a safety document includes a multilayer structure having a carrier layer and a plastic layer in which diffraction structures, for example holographic structures, are embossed in the form of a relief structure and which is combined with a reflective layer. The plastic layer includes a reaction lacquer layer selected from the group consisting of cationical curing lacquers, blue light-curing lacquers and chemical curing multicomponent lacquers.
Claims4
A transfer foil having a multilayer structure including a carrier layer and a plastic layer in which diffraction structures are embossed in the form of a relief structure and which is combined with a reflective layer, wherein the plastic layer comprises a reaction lacquer layer selected from the group consisting of cationical curing lacquers, blue light-curing lacquers and chemical curing multicomponent lacquers, and wherein the reflective layer includes openings which are pores or microcracks which are present systematically in a predetermined pattern to permit interaction of the embossed layer with a subsequently applied adhesive layer.
Dependencies are inferred from the claim text.