Security document and method of producing it
AssigneeGiesecke & Devrient GmbH
InventorsWittich Kaule, Gregor Grauvogl
Life of this patent
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Abstract
A security document such as a bank note, identity card or the like, includes at least one multilayer security element made of at least two layers of reaction lacquer or adhesive between which diffraction structures, in particular holographic structures, exist in the form of a relief. A reflective layer is additionally disposed between the layers of lacquer. The reaction lacquer of adhesive is the type curable or cross-linkable under physical (e.g. radiation) and/or chemical activation.
Claims32
A security document such as bank note, identity card or the like with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are present in the form of a relief structure and which are combined with a reflective layer, a first plastic layer directly contacting the document, on the one hand, and directly contacting the reflective layer, on the other hand, said first plastic layer comprising a layer of reaction lacquer selected from the group consisting of cationically curing lacquers, blue light-curing lacquers and chemically curing multicomponent lacquers.
An antifalsification paper for producing a bank note, identity card or the like with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are disposed in the form of a relief structure and which are combined with a reflective layer, a first plastic layer directly contacting the document, on the one hand, and directly contacting the reflective layer, on the other hand, said first plastic layer comprising a layer of reaction lacquer selected from the group consisting of cationically curing lacquers, blue light-curing lacquers and chemically curing multicomponent lacquers.
A method for producing an antifalsification paper, in particular for producing a bank note, identity card or the like, with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are present in the form of a relief structure and which are combined with a reflective layer, one of the plastic layers directly contacting the paper, comprising the steps of:
- introducing a layer of reaction lacquer between an antifalsification paper and a matrix bearing the diffraction structure, activating the reaction lacquer shortly before and/or during contacting between said one plastic layer and the paper, and carrying out curing of the lacquer at least during such contacting (contact) to an extent such that the layer of reaction lacquer bears the diffraction structure after separation from the matrix, and in the absence of radiation during such contacting,
- providing the embossed layer of reaction lacquer with the reflective layer, and
- applying a further layer of reaction lacquer to the reflective layer.
A method for producing an antifalsification paper, in particular for producing a bank note, identity card or the like, with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are present in the form of a relief structure and which are combined with a reflective layer, one of the plastic layers directly contacting the paper, comprising the steps of:
- introducing a layer of reaction lacquer between an antifalsification paper and a matrix bearing the diffraction structure, the reaction lacquer being a blue light-curing lacquer which is cured through the paper during contacting between said one plastic layer and the paper to an extent such that the layer of reaction lacquer bears the diffraction structures after separation from the matrix,
- providing the embossed layer of reaction lacquer with the reflective layer, and
- applying a further layer of reaction lacquer to the reflective layer.
A method for producing an antifalsification paper, in particular for producing a bank note, identity card or the like, with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are present m the form of a relief structure and which are combined with a reflective layer, one of the plastic layers directly contacting the paper, comprising the steps of:
- providing a carrier material with at least one plastic layer comprising reaction lacquer as well as a reflective layer in which the diffraction structures are embossed,
- providing the antifalsification paper and/or the reflective layer at least in partial areas with a further layer of reaction lacquer,
- bringing the antifalsification paper and the reflective layer in contact over the further layer of reaction lacquer, activating the reaction lacquer shortly before and/or during such contact and carrying out the curing of the reaction lacquer during such contact to an extent such that an inseparable compound arises, and in the absence of radiation during such contact, and
- removing any transfer foil that may be present where the carrier material contains a transfer foil.
A method for producing an antifalsification paper, in particular for producing a bank note, identity card or the like, with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are present in the form of a relief structure and which are combined with a reflective layer, one of the plastic layers directly contacting the paper, comprising the steps of:
- providing a carrier material with at least one plastic layer comprising a reaction lacquer as well as a reflective layer in which the diffraction structures are embossed,
- providing the antifalsification paper and/or the reflective layer at least in partial areas with a further layer of reaction lacquer,
- bringing the antifalsification paper and the reflective layer in contact over the further layer of reaction lacquer, wherein the reaction lacquer comprises a blue light-curing lacquer which is cured through the paper during such contact to an extent such that an inseparable compound arises, and
- removing any transfer foil that may be present where the carrier material contains a transfer foil.
A method for producing a security document such as a bank note, identity card or the like with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are present in the form of a relief structure and which are combined with a reflective layer, one of the plastic layers directly contacting the paper, comprising the steps of:
- introducing a layer of reaction lacquer between the paper and a matrix bearing the diffraction structure, activating the reaction lacquer shortly before and/or during such contacting between the one plastic layer and the paper, and carrying out curing of the reaction lacquer during such contacting to an extent such that the layer of reaction lacquer bears the diffraction structure after separation from the matrix, and in the absence of radiation during such contacting,
- providing the embossed layer of reaction lacquer with the reflective layer, and
- applying a further layer of reaction lacquer to the reflective layer.
A method for producing a security document such as a bank note, identity card or the like with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are present in the form of a relief structure and which are combined with a reflective layer, one of the plastic layers directly contacting the paper, comprising the steps of:
- introducing the layer of reaction lacquer between the document material and a matrix bearing the diffraction structure, said reaction lacquer comprising a blue light-curing lacquer which is cured through the document material during such contacting to an extent such that the layer of reaction lacquer bears the diffraction structures after separation from the matrix,
- providing the embossed layer of reaction lacquer with the reflective layer, and
- applying a further layer of reaction lacquer to the reflective layer.
A method for producing a security document such as a bank note, identity card or the like with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are present in the form of a relief structure and which are combined with a reflective layer, one of the plastic layers directly contacting the paper, comprising the steps of:
- providing a carrier material with at least one plastic layer comprising a reaction lacquer as well as a reflective layer in which the diffraction structures are embossed,
- providing the document material and/or the reflective layer at least in partial areas with a further layer of reaction lacquer,
- bringing the document material and the reflective layer in contact over the further layer of reaction lacquer, activating the reaction lacquer shortly before and/or during the contacting between said one plastic layer and the paper, and curing the reaction lacquer during such contacting to an extent such that an inseparable compound arises, and in the absence of radiation during such contacting, and
- removing any transfer foil that may be present where the carrier material contains a transfer foil.
A method for producing a security document such as a bank note, identity card or the like with a multilayer security element having at least two plastic layers comprising reaction lacquers between which diffraction structures, for example holographic structures, are present in the form of a relief structure and which are combined with a reflective layer, one of the plastic layers directly contacting the paper, comprising the steps of:
- providing a carrier material with at least one plastic layer comprising reaction lacquer as well as a reflective layer in which the diffraction structures are embossed,
- providing the document material and/or the reflective layer at least in partial areas with a further layer of reaction lacquer,
- bringing the document material and the reflective layer in contact over the further layer of reaction lacquer, and using as the reaction lacquer a blue light-curing lacquer, and curing the reaction lacquer through the document material during such contacting to an extent such that an inseparable compound arises, and
- removing any transfer foil that may be present where the carrier material contains a transfer foil.
Dependencies are inferred from the claim text.