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Multi-layered body, in particular multi-layered film and method for increasing forgery protection of multi-layered body

A technology for laminating films, laminates, applied in the direction of reproduction/marking methods, printing of special varieties of prints, layered products, etc.

Inactive Publication Date: 2006-11-15
LEONHARD KURZ GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method produces different colors without any changes to the laser conditions

Method used

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  • Multi-layered body, in particular multi-layered film and method for increasing forgery protection of multi-layered body
  • Multi-layered body, in particular multi-layered film and method for increasing forgery protection of multi-layered body
  • Multi-layered body, in particular multi-layered film and method for increasing forgery protection of multi-layered body

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Embodiment Construction

[0045] The following will first give Figures 1 to 10 , which describe hot-stamped and laminated films in which laser-induced personalization is produced in a layer structure for the purpose of providing anti-counterfeiting properties and providing combined visual effects. In connection with these figures, the basic method steps involved in the laser treatment will also be explained, by means of which the film, ie the laser-sensitive layer, is processed in order to produce the individualized markings under consideration. Instead of hot stamping films, other transfer films can also be used.

[0046] First, a description will be given of the layer structure of various thin films shown in the drawings and the respective constituents of each layer.

[0047] Figures 1 to 5 The films shown are hot stamped films. figure 1 The hot stamping film includes a carrier film 1 , a release layer 2 , a protective layer 3 , a laser sensing layer 4 , a background layer 5 and an adhesive lay...

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Abstract

Described is a laminate body, in particular a laminate foil, comprising a laser-sensitive layer and an identification element, for example a diffraction and / or hologram structure, a reflection layer, a printed image or the like, which is provided in a second layer and / or in the laser-sensitive layer, wherein the laser-sensitive layer has a marking produced by laser action, which is positioned in accurate register relationship relative to the identification element In addition the subject of the invention is a method of enhancing the forgery-proof nature of such a laminate body in which the laminate body is irradiated by means of a laser so that produced in the laser-sensitive layer is a laser-induced marking positioned in accurate register relationship with the position of the identification element.

Description

technical field [0001] The present invention relates to laminates, especially laminated films, and to a method for improving the anti-counterfeiting performance of laminates. Background technique [0002] DE 37 38 330 A1 discloses a laser marking method on surfaces with a pigmented coating, wherein the pigments in the pigmented coating change their internal molecular structure at different temperatures to produce different color. The specific surface temperature is achieved by the radiation effect of the local laser, which produces a colored laser mark. [0003] DE 44 10 431 A1 describes a method for representing personal-related data by applying a laser marking to an identity card to which a copying-protection unit is added by means of a transfer method. In the process of laser marking, an identification mark is applied, which is in the form of a series of numbers, part of which is set in the copy protection unit, and another part is set in the adjacent area on the ID car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D15/10B41M5/24B32B7/02B41M3/14B41M5/26B41M5/34
CPCB42D2033/20B42D2035/16B42D2035/24B42D2035/44B42D2035/50B41M3/14B41M5/267B41M5/34G03H1/0011G03H2250/12B42D25/405B42D25/41B42D25/00B42D25/328Y10T428/24851Y10T428/24802Y10T428/24868Y10T428/24835Y10T428/24934Y10T428/24917B42D25/45B42D25/435
Inventor 诺伯特·鲁兹格哈德·津纳
Owner LEONHARD KURZ GMBH & CO KG