Security Document and Method for Producing a Security Document

A security document with a carrier substrate which has a carrier layer and a thermosensitive coating which can be caused to change color by the action of heat by means of a thermal print head, with a film element which is transparent at least in areas and which has at least one decorative layer with at least one optical security feature and an adhesive layer, wherein the adhesive layer is arranged between the film element and the carrier substrate, the thermosensitive coating is arranged between the adhesive layer and the carrier layer, and the film element covers the thermosensitive coating at least in areas when viewed perpendicularly to the plane spanned by the upper side of the carrier substrate, and wherein the carrier substrate comprises a thermal paper and/or the carrier layer is coated with the thermosensitive coating and the thermosensitive coating extends at least in areas into the volume of the carrier layer.

A method for producing a security document comprising the steps:

• providing a carrier substrate with a carrier layer and a thermosensitive coating which is caused to change color by the action of heat, wherein the carrier substrate comprises a thermal paper and/or the carrier layer is coated with the thermosensitive coating and the thermosensitive coating extends at least in areas into the volume of the carrier layer;
• applying a film element, which is transparent at least in areas and which has at least one decorative layer with at least one optical security feature to the carrier substrate in such a way that the thermosensitive coating is arranged between the film element and the carrier layer and the film element covers the thermosensitive coating at least in areas when viewed perpendicularly to the plane spanned by the upper side of the carrier substrate, wherein after applying the film element a first item of information is inscribed in the security document by means of a thermal print head by activating the color change of the thermosensitive coating in areas in such a way that at least part of the first item of information is covered by the film element when viewed perpendicularly to the plane spanned by the upper side of the carrier substrate.

A method for producing an individualized security document comprising the steps:

• feeding in a security paper comprising a carrier substrate, which has a carrier layer and a thermosensitive coating that is caused to change color by the action of heat, wherein the carrier substrate comprises a thermal paper and/or the carrier layer is coated with the thermosensitive coating and the thermosensitive coating extends at least in areas into the volume of the carrier layer and wherein the security paper further comprises a film element which is transparent at least in areas, wherein the film element covers the thermosensitive coating at least in areas when viewed perpendicularly to the plane spanned by the upper side of the carrier substrate, inscribing a first item of information by means of a thermal print head by activating the color change of the thermosensitive coating in areas in such a way that at least part of the first item of information is covered by the film element when viewed perpendicularly to the plane spanned by the upper side of the carrier substrate.