Embossed film and security document

Abstract

The invention concerns an embossing film, in particular a hot embossing film, including a transfer layer (7) arranged releasably on a carrier film (1), wherein the transfer layer (7) has at least one color layer (4) whose color appearance changes in dependence on a viewing angle, wherein the color layer contains colored interference pigments with a metal core. The invention further concerns a security document (8) produced using the embossing film.

Description

technical field [0001] The invention relates to an embossed film, in particular a heat embossed film, comprising a transfer layer detachably arranged on a base film and a security document, in particular banknotes, certificates, identity cards, check cards, credit cards and the like. Background technique [0002] Embossed films, especially thermally embossed films, are known in the prior art. In known embossed films, a transfer layer is transferred, for example, from a base film to a substrate under the action of heat and pressure. Attached to the substrate under the condition of a bond layer, the adhesive layer is usually a thermal adhesive layer or a radiation hardenable adhesive layer. [0003] In particular, hot embossed films are widely used for attaching security documents to, for example, securities such as banknotes, credit cards, certificates, etc. or other objects to be secured. [0004] A security element is known from DE 41 01 301 A1, which consists of a film pr...

AI Technical Summary

Problems solved by technology

[0009] The disadvantage is that the proposed visually variable materials have an unsatisfactory viewing angle-dependent color change and therefore do not meet the increasingly high security requirements of the items or documents to be secured

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