Embossed film and security document

A technology for security documents and films, applied in the field of embossed films, can solve the problems of unsatisfactory color changes of visually variable materials, unsatisfactory anti-counterfeiting items or document anti-counterfeiting requirements, etc.

Inactive Publication Date: 2006-09-06
LEONHARD KURZ GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Embossed film and security document
  • Embossed film and security document
  • Embossed film and security document

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] FIG. 1 shows a heat press film having a structure consisting of a base film 1 , a release layer 2 , a protective layer 3 , a color layer 4 , a magnetizable layer 5 and an adhesive layer 6 .

[0061] figure 2 A security document 8 is shown, which, starting from the security document 8 , is provided with a layered structure consisting of an adhesive layer 6 , a magnetizable layer 5 , a colored layer 4 and a protective layer 3 .

[0062] The film thicknesses or layer thicknesses given below are not limited to the examples given, but generally applicable.

[0063] thin film structure

[0064] - Base film 1: film thickness 12-26 μm, preferably 19-23 μm; material: polyester, preferably polyethylene terephthalate;

[0065] - Peeling layer or separation layer 2: common wax layer when embossing the film, layer thickness: at most about 1 μm;

[0066] - protective layer 3 (protective paint): layer thickness 1-5 μm, preferably 1-3 μm;

[0067] - Chromatic layer 4: Layer thickne...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D15/10B41M3/14B32B27/20B42D25/00B44C1/17
CPCB42D2033/10B42D25/00B42D2033/18Y10T428/256Y10T428/2486Y10T428/254B42D25/425B42D25/47B42D25/29B42D25/373
Inventor 京特·弗里德尔乌韦·嫩德尔
Owner LEONHARD KURZ GMBH & CO KG
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