Security paper, value document obtainable therefrom and method for manufacturing said paper and document

Patent metadata

Field	Value
Publication number	US-9827803-B2
Application number	US-201214361380-A
Country	US
Kind code	B2
Filing date	Nov 29, 2012
Priority date	Dec 9, 2011
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

A security paper for manufacturing value documents has a planar substrate equipped on one surface with an anti-forgery means based on a carrier foil having an optically variable security feature. The anti-forgery means and a partial substrate area surrounding the anti-forgery means is furnished with a dirt-repellent radiation-curing first lacquer substantially not influencing the perceptibility of the optically variable security feature. The layer thickness of the lacquer lying is in a range of 0.7 to 2 micrometers. The radiation-curing first lacquer is may be a UV-cross-linking lacquer which after cross-linking is high-gloss. The substrate can be furnished on its surface lying outside the anti-forgery means with a dirt-repellent second lacquer and optionally partly overlaps the first lacquer in the region of the partial substrate area surrounding the anti-forgery means. The second lacquer involves either a physically drying, water-based dispersion lacquer, or a UV-cross-linking lacquer, and has a matt impression.

First claim

The invention claimed is:

1. A security paper for making a value document and having a planar substrate which is equipped on at least one surface with at least one anti-forgery means, wherein
the anti-forgery means comprises a carrier foil which is visually recognizable to a viewer at least in some regions and has an optically variable security feature, and
the anti-forgery means and a partial substrate area surrounding the anti-forgery means are directly furnished, for extending life and fitness for circulation, with a dirt-repellent radiation-curing first lacquer which preserves perceptibility of the optically variable security feature, the layer thickness of said lacquer lying in a range of 0.7 to 2 μm,
wherein the anti-forgery means is present in the form of a security strip or security thread being surrounded by the partial substrate area furnished with the first lacquer on two sides or in the form of a patch being surrounded by the partial substrate area furnished with the first lacquer on four sides, and
wherein the partial substrate area surrounding the anti-forgery means has a width of 0.3 to 10 mm.

2. The security paper according to claim 1 , wherein the radiation-curing first lacquer is a UV-cross-linked lacquer which is high-gloss.

3. The security paper according to claim 1 , wherein the substrate is furnished on its surface lying outside the anti-forgery means with a water-based primer layer which optionally partly overlaps the dirt-repellent radiation-curing first lacquer, in the region of the partial substrate area surrounding the anti-forgery means, and the primer layer is optionally furnished with a UV-cross-linking lacquer forming a cover layer, which protects the substrate from physical and chemical influences.

4. The security paper according to claim 1 , wherein the substrate is furnished on its surface lying outside the anti-forgery means with a dirt-repellent second lacquer which
optionally partly overlaps the dirt-repellent radiation-curing first lacquer, in the region of the partial substrate area surrounding the anti-forgery means, and
either (a) involves a physically drying, water-based dispersion lacquer which can optionally contain cross-linking agent and after drying has a matt impression having a gloss of less than 20 gloss units at 60°, measured by means of gloss meters according to DIN standard 67530,
or (b) involves a UV-cross-linking lacquer which after cross-linking has a matt impression having a gloss of less than 20 gloss units at 60°, measured by means of gloss meters according to DIN standard 67530.

5. The security paper according to claim 4 , wherein the dirt-repellent second lacquer involves a physically drying, water-based dispersion lacquer which cures through removal of the dispersant and is an aqueous dispersion of a polyacrylic resin and/or of a polyurethane resin.

6. A security paper according to claim 1 , wherein the substrate is printed with signs or patterns on its surface lying outside the anti-forgery means or on the surface of a dirt-repellant second lacquer lying outside the anti-forgery means.

7. The security paper according to claim 6 , wherein
the substrate is furnished on its surface lying outside the anti-forgery means with a water-based primer layer which optionally partly overlaps the stated dirt-repellent radiation-curing first lacquer in the region of the partial substrate area surrounding the anti-forgery means, and
the substrate is printed with signs or patterns, and the primer layer is furnished with a UV-cross-linking third lacquer forming a cover layer, which protects the substrate from physical and chemical influences.

8. The security paper according to claim 1 , wherein the optically variable security feature has microstructures and micro-imaging elements for magnified imaging of the microstructures.

9. A security paper for making a value document and having a planar substrate which is equipped on at least one surface with at least one anti-forgery means, wherein
the anti-forgery means comprises a carrier foil which is visually recognizable to a viewer at least in some regions and has an optically variable security feature, and
the anti-forgery means and a partial substrate area surrounding the anti-forgery means are directly furnished, for extending life and fitness for circulation, with a dirt-repellent radiation-curing first lacquer which preserves perceptibility of the optically variable security feature, the layer thickness of said lacquer lying in a range of 0.7 to 2 μm,
wherein the anti-forgery means is present in the form of a security strip or security thread being surrounded by the partial substrate area furnished with the first lacquer on two sides or in the form of a patch being surrounded by the partial substrate area furnished with the first lacquer on four sides, and
wherein the partial substrate area surrounding the anti-forgery means has a width of 0.3 to 10 mm, and
wherein the optically variable security feature has microstructures and micro-imaging elements for magnified imaging of the microstructures.

Assignees

• Giesecke & Devrient Gmbh
• Giesecke & Devrient Currency Technology Gmbh

Inventors

• Schiffmann Peter

Classifications

• B42D2033/32

  Operations & Transport · mapped topic

• B42D25/29

  Securities; Bank notes · CPC title

• B42D25/00

  Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof (printing processes to produce identification or security features B41M3/14) · CPC title

• B42D25/355

  Security threads · CPC title

• B42D25/328 Primary

  Diffraction gratings; Holograms · CPC title