EP3763541B1 - Datenträger und datenträger-produktionsverfahren - Google Patents

Datenträger und datenträger-produktionsverfahren Download PDF

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Publication number
EP3763541B1
EP3763541B1 EP20184544.3A EP20184544A EP3763541B1 EP 3763541 B1 EP3763541 B1 EP 3763541B1 EP 20184544 A EP20184544 A EP 20184544A EP 3763541 B1 EP3763541 B1 EP 3763541B1
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EP
European Patent Office
Prior art keywords
laser
optically variable
layer
variable properties
carrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20184544.3A
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English (en)
French (fr)
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EP3763541A1 (de
Inventor
Slawomir Ziólkowski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polska Wytwornia Papierow Wartosciowych SA
Original Assignee
Polska Wytwornia Papierow Wartosciowych SA
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Publication of EP3763541A1 publication Critical patent/EP3763541A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/346—Perforations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/364—Liquid crystals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/455—Associating two or more layers using heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/46—Associating two or more layers using pressure

Definitions

  • the present invention relates to a data carrier, comprising a layer coated at least in part with a layer of material with optically variable properties and to a method of production of such a multi-layer data carrier.
  • Data carriers such as documents, in form of a laminate of several layers are known, the carriers possibly comprising various types of security features. This applies in particular to carriers that must be protected against forgery, such as passports, visa documents, identification documents, driving licences, vehicle registration cards, bank cards and documents, certificates, banknotes, etc.
  • Data carriers may comprise various types of markings, such as general markings (e.g. document name, etc.) and/or individual markings (e.g. personal data, photograph, document number, etc.).
  • materials with optically variable properties are often used, which give different optical impressions (related to e.g. changes in colour or its shades) depending on the angle at which the material is perceived.
  • Such materials include, among others, iridescent or interference dyes and pigments or liquid crystal paints.
  • a known technical problem with the use of a liquid crystal layer with optically variable properties is the fact that to make the optically variable properties visible it is required to observe this layer on a contrasting, for example dark or black, background.
  • the solutions described in the prior art include documents observed from one side wherein a substrate providing a contrasting background is placed underneath the optically variable layer or an external contrasting background is required for observation.
  • the intensity of laser radiation should also be selected so that the layer with optically variable properties is not altered under its influence.
  • many materials with optically variable properties absorb a portion of laser radiation and many interference pigments react to some extent to laser exposure, which may affect the optically variable effect obtained and/or the visibility of markings underneath the optically variable layer (e.g. markings made by laser) ( WO2015189404 ).
  • EP1281538 describes a multi-layered document comprising a layer with optically variable properties on a semi-transparent substrate and a metallic layer lying underneath those, fragments of which are removed to form a marking. This marking gives a different impression depending on which side of the document it is observed, and the properties of the optically variable layer can be observed against the background of the unremoved metallic layer.
  • EP1778501 describes a document containing an element comprising a liquid crystal material which, in transmitted light, provides a first optical impression, while in light falling against a predetermined and easily accessible background, which is created by a highly absorbent dark surface, provides a second optical impression which is significantly different from the first optical impression, namely, firstly, the authenticity feature in light falling on a highly absorbent dark surface shows an optically variable effect, and secondly, in light falling on a highly absorbent dark surface, the appearance or information content of the patterns, signs or codings of the authenticity feature is significantly altered, or the patterns, signs or codings disappear completely.
  • document WO2015189404 describes a technology in which a security comprises a laser-marked layer, with some markings being observable through an optically variable layer and some not, giving a different optical effect.
  • Laser marking is carried out through the optically variable layer and is observed on one side of the document, and different impressions are caused by the possibility of observation of a portion of the markings through the optically variable layer, as well as by the use of additional markings made by means of printing with a paint or pigment which are susceptible to laser irradiation.
  • EP2114690 describes a document comprising at least one transparent layer.
  • the document has a determined section allowing to look through, with the transparent area containing markings, for example, made by laser marking, placed between two types of material with different properties when exposed to UV. Due to these two types of material, the markings observed in ultraviolet rays on one side provide a different impression than when observed from the other side.
  • international application WO2014187825 discloses a data carrier with laser-crafted markings, observed against a semi-reflective layer, so that those markings are visible in reflected light on one side of the document but not on the other, but can be observed on both sides of the document in transmitted light.
  • the present inventors have developed a way to produce a security feature utilising a layer with optically variable properties and a technique of laser marking, as well as a method of production of a multi-layer, secured data carrier such as a document, for example an ID card or a personalised passport page that contains this security feature.
  • the present invention therefore relates to a data carrier comprising a layer at least partially coated with a layer of material with optically variable properties, the layer of material with optically variable properties being transparent,
  • the carrier includes a laser-markable layer, with laser-applied markings visible from both sides of the carrier, with the laser-markable side of the carrier showing a marking, preferably black or dark, contrasting with the surroundings, which at least partially obscures the visibility of the coating with optically variable properties, wherein the same marking observed on the opposite, laser-unmarked side of the carrier, i.e. the side with the visible coating with optically variable properties, creates a contrasting, preferably black or dark, background for the coating with optically variable properties, providing the marking seen on the laser-unmarked side of the carrier with optically variable properties.
  • the markings capable of being made with a laser are laser-engraved markings.
  • the data carrier in a preferred embodiment, it contains an inner layer which is at least semi-transparent or opaque, preferably bright, e.g. white, wherein the inner layer is covered on both sides by transparent outer layers, and only in a portion of the area of the carrier there is an opening in the inner layer, wherein the area of the opening is at least partly covered by a coating with optically variable properties from one, laser-unmarked, side of the carrier and with laser markings from the other, laser-markable, side of the carrier.
  • an inner layer which is at least semi-transparent or opaque, preferably bright, e.g. white, wherein the inner layer is covered on both sides by transparent outer layers, and only in a portion of the area of the carrier there is an opening in the inner layer, wherein the area of the opening is at least partly covered by a coating with optically variable properties from one, laser-unmarked, side of the carrier and with laser markings from the other, laser-markable, side of the carrier.
  • the opening is filled with transparent filling material.
  • a coating with optically variable properties is located in the area of the transparent filling and wherein between the coating with optically variable properties and the laser-markable layer is an at least one transparent layer that is non-laser-markable, wherein preferably the coating with optically variable properties is located between transparent layers that are not laser-markable.
  • the height of the filling differs by at most +/- 10% from the height of the opening.
  • the invention further relates to a method of production of a multi-layer data carrier, the method comprising the following steps:
  • the method additionally includes, after step b), step c) of applying markings in the laser-markable layer with a laser, wherein during marking, the laser beam does not pass through the material with optically variable properties, and at least a portion of the markings thus applied is visible from both sides of the carrier, wherein from the laser-markable side of the carrier which is subjected to laser marking, the marking at least partially obscures the visibility of the layer with optically variable properties, and the same marking observed from the opposite, laser-unmarked side of the carrier, that is, the side with the visible layer with optically variable properties, creates a contrasting, preferably black or dark, background for the layer with optically variable properties, which ensures optically variable properties for the marking seen from the laser-unmarked side of the carrier.
  • step c) the application of markings in step c) is carried out by means of laser engraving.
  • step b) the individual layers of the data carrier are connected by placing the layer with optically variable properties between transparent layers that are non-laser-markable layers.
  • the method according to the invention further includes, prior to step a), a step of making an opening in one of the layers of the multi-layer structure of the data carrier when at least one of the layers of the multi-layer structure of the data carrier is opaque, wherein in step a), the material with optically variable properties is applied to at least a portion of the area of the opening prepared as above, and wherein optionally in step c), markings are applied by laser to at least a portion of the area of the opening prepared as above.
  • the opening is filled with transparent filling material.
  • the coating with optically variable properties is placed in the area of the transparent filling between transparent layers that are non-laser-markable.
  • the filling height differs by at most +/- 10% from the depth of the opening.
  • the subject matter according to the invention involves applying a coating of material with optically variable properties 401 on one of the layers of a multi-layer structure of a data carrier (for example, a document), wherein the carrier further includes a laser-markable layer 104 ( Fig. 1 ).
  • the application of the coating with optically variable properties can be achieved, for example, by printing a transparent liquid crystal ink with optically variable properties or by applying a transparent film with such properties to one of the layers of the multi-layer document structure or by another method known to one skilled in the art.
  • the coating made of material with optically variable properties can therefore be applied, for example, using well-known printing techniques such as screen printing, flexographic printing, pad printing.
  • the optically variable properties of a material are revealed when the material is placed on a contrasting, preferably black, background.
  • the individual layers of the multi-layer structure are combined in a way that is known in the art, e.g. using an adhesive, cold lamination, hot lamination, etc.
  • a hot lamination process can be used that requires the right temperature, pressure and time.
  • markings 501 can be applied, preferably in black or dark (e.g. grey scale) colour, for example as graphic elements, numbers and/or personal data such as e.g. a photo.
  • the markings can be applied with lasers as known in the field, for example with an Nd:YAG 1064 nm laser.
  • the laser-markable layer 104 can be made from any suitable material known in the art. Exemplary materials include polycarbonate (PC), polyethylene terephthalate (PET/PETG), polypropylene (PP), poly(vinyl chloride) PVC, a PC and PETG composite (PEC). Markings are applied in the laser-markable layer 104 so that the laser beam does not pass through the printed or applied coating with optically variable properties 401.
  • the laser-markable layer 104 is placed from one side of the data carrier, above the coating with optically variable properties 401, and due to this the laser-markable layer 104 can absorb all the energy of the laser, hence the beam thereof not changing the properties of the coating with optically variable properties 401, but only causing blackening in the area of the laser-markable layer 104, for example, susceptible of laser engraving.
  • the markings 501 applied by laser may take a form of fixed graphic elements e.g. images, marks, logos or may contain personalized data such as, for example, a photo, first name, surname, expiry date of the document or date of birth.
  • Laser markings can be markings in positive or negative and can include elements such as fine guilloche lines or microtexts.
  • a dark image is visible when observing in transmitted light.
  • the laser markings 501 can therefore be made so that the laser beam does not pass through the printed or applied coating with optically variable properties 401 and does not change the properties of the coating.
  • the resulting data carrier according to the invention can therefore be provided with the markings 501 visible from both sides of the carrier as well as in transmitted light.
  • the coating with optically variable properties 401 is located so that a transparent, non-laser-markable layer is placed between the coating with optically variable properties 401 and the laser-markable layer 104.
  • the coating with optically variable properties 401 is placed between transparent layers that are not susceptible to laser marking (e.g. engraving).
  • a transparent layer which is not laser-markable, may comprise various materials known to one skilled in the art, such as polycarbonate (PC), polyethylene (PE), polypropylene (PP), poly(vinyl chloride) (PVC), or various resins such as phenolic, phenol-formaldehyde resins, etc. wherein the materials do not include an addition of laser-sensitive pigments such as carbon black (non-engravable films).
  • PC polycarbonate
  • PE polyethylene
  • PP polypropylene
  • PVC poly(vinyl chloride)
  • resins such as phenolic, phenol-formaldehyde resins, etc. wherein the materials do not include an addition of laser
  • the individual layers forming the data carrier according to the invention may comprise materials well known to the person skilled in the art, such as, but not limited to, plastic or synthetic materials, thermoplastic or thermosetting materials and plastics, for example: polycarbonate (PC), polyethylene (PE), polypropylene (PP), poly(vinyl chloride) (PVC), or various resins, for example: phenolic, phenol-formaldehyde resins, etc.
  • plastic or synthetic materials for example: polycarbonate (PC), polyethylene (PE), polypropylene (PP), poly(vinyl chloride) (PVC), or various resins, for example: phenolic, phenol-formaldehyde resins, etc.
  • Such materials include, among others, opalescent or interference dyes and pigments or liquid crystal paints, for example, liquid crystal paints known in the art, e.g. SICPA OASIS ® (manufactured by SICPA), COLORCRYPT ® LC (manufactured by MERCK), or dyes and pigments known in the art, e.g. Iriodin, Pyrisma, Colorstream, Miraval - MERCK, Mearlin, Lumina, Firemist, Magnapearl - BASF.
  • liquid crystal paints e.g. SICPA OASIS ® (manufactured by SICPA), COLORCRYPT ® LC (manufactured by MERCK), or dyes and pigments known in the art, e.g. Iriodin, Pyrisma, Colorstream, Miraval - MERCK, Mearlin, Lumina, Firemist, Magnapearl - BASF.
  • the entire data carrier is transparent.
  • the data carrier further contains an inner layer (core) 101 which is at least translucent or opaque (preferably bright, e.g. white).
  • the carrier further comprises transparent outer layers 102.
  • an opening 201 is made in the inner layer 101 ( Fig. 2 ).
  • the opening 201 can be made using a plotter, a laser or any other method known in the art.
  • the opening 201 is furthermore filled with transparent filling material 301.
  • the filling can be made from a material similar to the other layers of the data carrier, e.g. it is preferable when the body of the data carrier and the filling are made of the same material, e.g. polycarbonate.
  • the filling 301 is matched in shape and thickness to the opening 201.
  • the individual dimensions of the filling are smaller than the corresponding dimensions of the opening 201, which enables easy and precise placement of the filling in the opening.
  • the height of the filling 301 differs by at most +/- 10% from the depth of the opening 201.
  • the coating of material with optically variable properties 401 is applied (e.g., by printing or any other method known in the art) at least in the area of the opening 201, for example, over the lower or upper surface of one of the transparent outer layers 102 or over the lower or upper surface of the transparent outer filling 301 filling the opening 201 or over the lower or upper surface of one of the outer layers of the transparent filling 301 ( Fig. 3 ).
  • the coating with optically variable properties 401 is located in the area of the transparent filling 301 between transparent layers that are not susceptible to laser marking (e.g. engraving).
  • the material with optically variable properties 401 may therefore be applied as a continuous layer or coating, or may cover only a portion of the surface area of the data carrier, but at least the portion comprising the opening 201.
  • the carrier side closer to the coating with optically variable properties 401 is the laser-unmarked side 602 of the carrier.
  • the data carrier of the embodiment further comprises, from the side opposite to the laser-unmarked side 602 of the carrier, at least above the opening 201, at least one layer that may be subject to laser marking 104, for example, laser-engravable, allowing laser marking and the application of contrasting, preferably dark or black markings, which may form the background for the coating with optically variable properties 401.
  • the laser-markable layer 104 is located on the laser-markable side 601 of the data carrier, above the coating with optically variable properties 401, as a result of which it can absorb all the energy of the laser, its beam then not changing the properties of the optically variable coating, but only causing blackening in the area of the layer that may be susceptible to laser marking 104, for example, susceptible to laser engraving.
  • the method developed by the present inventors allows to obtain a data carrier having a security feature, providing a completely different optical impression when observed from two sides of the data carrier containing the feature.
  • the subject matter of the invention provides the possibility of using the markings with optically variable properties in a transparent element (without the need for a contrast layer, e.g. dark substrate).
  • Production with the method according to the invention is relatively simple and does not require the laser parameters to be adjusted to the characteristics of the material with optically variable properties, as the laser marking is made in such a way that the laser beam does not pass through the material with optically variable properties.
  • the structure of the data carrier is not limited to the layout of layers as shown in the embodiments. Person skilled in the art will appreciate that as long as the possibility is maintained of making laser markings in such a way that the laser beams does not pass through the material with optically variable properties and the laser markings made can be observed from both sides of the carrier (from the side of the application of laser markings and from the side of the layer of the material with optically variable properties), the remaining layers possibly present may have a different order or layout, as long as they remain within the scope of the claims.
  • Fig. 1 is a schematic view of a cross-section of a data carrier containing a security feature with optically variable properties according to an embodiment of the invention.
  • the carrier has a layered structure, wherein individual layers are transparent.
  • the carrier comprises a layer coated with a coating of material with optically variable properties, wherein the layer of material with optically variable properties 401 is transparent.
  • the carrier further comprises a laser-markable layer 104, above the coating with optically variable properties 401, due to which the laser-markable layer 104 can absorb all the energy of the laser, the laser beam therefore not changing the properties of the coating with optically variable properties 401, but only causing a blackening in the area of the laser-markable layer 104, for example, susceptible to laser engraving.
  • this method of application of markings makes it possible to observe, under incident light, a contrasting, preferably dark or black marking, from the laser-markable side 601 of the carrier while providing a different impression of an optically variable image depending on the angle of observation from the laser-unmarked side 602 of the carrier, from the coating with optically variable properties 401.
  • a dark image is visible when observing in transmitted light.
  • Fig. 2 is a schematic view of across-section of another embodiment of a data carrier containing a security feature with optically variable properties according to an embodiment of the invention.
  • the carrier has a layered structure and contains one inner layer 101 (core), which is opaque (white) and on both sides having a transparent outer layer 102, which completely transmits light.
  • the inner layer 101 in the area of the security feature contains an opening 201 made with a cutting plotter equipped with a knife.
  • the inner layer 101, in the area of the opening contains a filling 301, compensating for differences in thickness, consisting of transparent layers forming a window in the opaque card body.
  • the filling 301 is adjusted to the shape and thickness of the opening 201.
  • Fig. 3 is a schematic view of a cross-section of a data carrier at the location of the optically variable security feature according to an embodiment of the invention.
  • the coating with optically variable properties 401 is produced by printing.
  • the coating 401 is applied at the place of the transparent filling 301 between transparent layers that are not susceptible to laser engraving.
  • the data carrier includes at least one laser markable layer 104, in the example being susceptible to laser engraving, allowing laser marking and the application of contrasting dark markings that provide a background for the coating with optically variable properties.
  • the laser-markable layer 104 is placed from the laser-markable side 601 of the data carrier, above the coating with optically variable properties 401, due to which it can absorb all the energy of the laser, the laser beam therefore not changing the properties of the optically variable coating, but only causing a blackening in the area of the layer that may be laser-marked 104, for example, susceptible to laser engraving.
  • the laser-applied markings 501 may take form of fixed graphic elements e.g. images, marks, logos or contain personalised data such as, for example, a photo, first name, surname, expiry date of the document or date of birth.
  • the laser applied markings are applied from the laser-markable side 601 of the carrier with a visible layer susceptible to laser marking.
  • This method of marking application makes it possible to observe, under incident light, a contrasting, preferably dark or black marking, from the laser-markable side 601 of the carrier while providing a different impression of an optically variable image depending on the angle of observation from the laser-unmarked side 602 of the carrier, from the coating with optically variable properties 401.
  • a dark image is visible when observing in transmitted light.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Credit Cards Or The Like (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Claims (14)

  1. Ein Datenträger, der eine Schicht umfasst, die zumindest teilweise mit einer Schicht aus einem Material versehen ist, das optisch variable Eigenschaften aufweist, wobei die Schicht aus dem Material mit optisch variablen Eigenschaften transparent ist,
    wobei der Träger darüber hinaus eine zumindest teilweise transparente, mit Laser beschreibbare Schicht (104) umfasst, auf der Zeichen mithilfe eines Lasers aufgezeichnet werden können, so dass die Zeichen nach der Aufzeichnung von den beiden Seiten des Trägers sichtbar werden,
    wobei die mit dem Laser beschreibbare Schicht (104) so angeordnet ist, dass die mit Laser aufgezeichneten Zeichen (501) nach der Aufzeichnung die Sichtbarkeit der Schicht mit optisch variablen Eigenschaften (401) von einer Seite (601) des Trägers teilweise verdunkeln und von der anderen Seite (602) des Trägers einen kontrastierenden Hintergrund für die Schicht mit optisch variablen Eigenschaften (401) bilden, so dass das Zeichen (501), von der nicht beschriebenen Seite (602) des Trägers aus gesehen, optisch variable Eigenschaften aufweisen wird
    dadurch gekennzeichnet, dass
    mindestens ein Teilbereich der mit dem Material mit optisch variablen Eigenschaften (401) beschichteten Fläche transparent ist,
    und zwischen der Schicht mit optisch variablen Eigenschaften (401) und der laserbeschreibbaren Schicht (104) mindestens eine transparente, nicht mit Laser beschreibbare Schicht angeordnet ist.
  2. Ein Datenträger nach Anspruch 1, dadurch gekennzeichnet, dass die Schicht mit optisch variablen Eigenschaften (401) zwischen den transparenten, nicht mit Laser beschreibbaren Schichten angeordnet ist.
  3. Ein Datenträger nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass er die laserbeschreibbare Schicht (104) mit laseraufgezeichneten Zeichen (501) enthält, wobei die Zeichen (501) von den beiden Seiten des Trägers sichtbar sind,
    mit der laserbeschreibbaren Seite (601) des Trägers, die ein mit dem Hintergrund kontrastierendes, vorzugsweise schwarzes oder dunkles Zeichen (501) zeigt, das die Sichtbarkeit der Schicht mit optisch variablen Eigenschaften (401) zumindest teilweise verdunkelt, wobei dasselbe Zeichen (501), wenn es von der gegenüberliegenden, nicht laserbeschreibbaren Seite (602) des Trägers, d. h. der Seite mit der sichtbaren Schicht mit optisch variablen Eigenschaften (401), betrachtet wird, einen kontrastierenden, vorzugsweise schwarzen oder dunklen Hintergrund für die Schicht mit optisch variablen Eigenschaften (401) erzeugt, so dass das Zeichen (501) von der nicht laserbeschreibbaren Seite (602) des Trägers mit optisch variablen Eigenschaften aus gesehen werden kann.
  4. Ein Datenträger nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die mit Laser aufgezeichneten Zeichen (501) mit Laser eingravierte Zeichen sind.
  5. Ein Datenträger nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass er eine Innenschicht (101) umfasst, die zumindest halbtransparent oder opak, vorzugsweise hell, z. B. weiß ist, wobei die Innenschicht (101) beidseitig mit transparenten Außenschichten (102) beschichtet ist und nur in einem Teilbereich des Trägers eine Öffnung (201) in der Innenschicht (101) vorhanden ist, wobei der Bereich der Öffnung mindestens teilweise mit der Schicht mit optisch variablen Eigenschaften (401) auf der einen, nicht mit Laser beschriebenen Seite (602) des Trägers und mit laseraufgezeichneten Zeichen (501) auf der anderen, mit Laser beschreibbaren Seite (601) bedeckt ist.
  6. Ein Datenträger nach Anspruch 5, dadurch gekennzeichnet, dass die Öffnung (201) mit einem transparenten Füllmaterial (301) gefüllt ist,
    wobei vorzugsweise die Schicht mit optisch variablen Eigenschaften (401) im Bereich der transparenten Füllung (301) angeordnet ist, wobei zwischen der Schicht mit optisch variablen Eigenschaften (401) und der laserbeschreibbaren Schicht (104) mindestens eine transparente Schicht angeordnet ist, die nicht laserbeschreibbar ist, wobei vorzugsweise die Schicht mit optisch variablen Eigenschaften (401) zwischen den transparenten Schichten angeordnet ist, die nicht laserbeschreibbar sind.
  7. Ein Datenträger nach Anspruch 6, dadurch gekennzeichnet, dass die Höhe der Füllung (301) sich um höchstens +/- 10% von der Tiefe der Öffnung (201) unterscheidet.
  8. Ein Verfahren zur Herstellung eines mehrschichtigen Datenträgers, dadurch gekennzeichnet, dass das Verfahren folgende Schritte umfasst:
    a) Auftragen eines transparenten Materials mit optisch variablen Eigenschaften auf mindestens einem Teilbereich der Fläche einer Schicht des aus mehreren Schichten aufgebauten Datenträgers, wobei mindestens ein Teilbereich der mit dem Material mit optisch variablen Eigenschaften beschichteten Fläche transparent bleibt;
    b) Verbinden (vorzugsweise durch Laminierung) von Schichten des aus mehreren Schichten aufgebauten Datenträgers, einschließlich der Schicht, die zumindest teilweise mit dem im Schritt a) erhaltenen Material mit optisch variablen Eigenschaften beschichtet ist, und einer laserbeschreibbaren Schicht,
    wobei zwischen der Schicht, die zumindest teilweise mit dem im Schritt a) erhaltenen Material mit optisch variablen Eigenschaften beschichtet ist, und der laserbeschreibbaren Schicht eine transparente Schicht angeordnet sein soll, die nicht laserbeschreibbar ist, und die laserbeschreibbare Schicht so angeordnet sein soll, dass die Zeichen mit einem Laser von einer Seite des Trägers aus aufgezeichnet werden können, so dass die Laserstrahlen die laserbeschreibbare Schicht erreichen können, ohne das Material mit optisch variablen Eigenschaften zu durchdringen.
  9. Ein Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass es nach dem Schritt b) einen weiteren Schritt umfasst:
    c) Aufzeichnen von Zeichen auf der laserbeschreibbaren Schicht mit einem Laser, wobei der Laserstrahl nicht durch das Material mit optisch variablen Eigenschaften durchdringen soll und mindestens ein Teil der in dieser Weise aufgezeichneten Zeichen von den beiden Seiten des Trägers sichtbar sein soll, wobei von der laserbeschreibbaren Seite des Trägers, auf der das Aufzeichnen mit dem Laser erfolgt, das Zeichen zumindest teilweise die Sichtbarkeit der Schicht mit optisch variablen Eigenschaften verdunkelt, und dasselbe Zeichen von der gegenüberliegenden, nicht laserbeschriebenen Seite des Trägers, d. h. der Seite mit der sichtbaren Schicht mit optisch variablen Eigenschaften, betrachtet, einen kontrastierenden, vorzugsweise schwarzen oder dunklen Hintergrund für die Schicht mit optisch variablen Eigenschaften erzeugt, der optisch variable Eigenschaften für das Zeichen von der nicht laserbeschriebenen Seite des Trägers aus gesehen gewährleistet.
  10. Ein Verfahren nach einem der Ansprüche 8 bis 9, dadurch gekennzeichnet, dass das Aufzeichnen von Zeichen im Schritt c) mittels Technik der Lasergravur erfolgt.
  11. Ein Verfahren nach einem der Ansprüche 9 bis 10, dadurch gekennzeichnet, dass die einzelnen Schichten des Datenträgers im Schritt b) miteinander verbunden werden, indem die Schicht mit optisch variablen Eigenschaften zwischen die transparenten Schichten, die nicht laserbeschreibbare Schichten sind, angeordnet wird.
  12. Ein Verfahren nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass es vor dem Schritt a) einen Schritt umfasst, in dem eine Öffnung in einer Schicht des aus mehreren Schichten aufgebauten Datenträgers hergestellt wird, wenn mindestens eine Schichte des aus mehreren Schichten aufgebauten Datenträgers opak ist, wobei im Schritt a) das Material mit optisch variablen Eigenschaften auf mindestens einen Teilbereich der wie oben vorbereiteten Öffnung aufgetragen wird, und wobei optional im Schritt c) die Zeichen auf mindestens einen Teilbereich der wie oben vorbereiteten Öffnung mit dem Laser aufgezeichnet werden.
  13. Ein Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass die Öffnung mit einem transparenten Füllmaterial gefüllt wird,
    wobei vorzugsweise die Schicht mit optisch variablen Eigenschaften im Bereich der transparenten Füllung zwischen den transparenten, nicht laserbeschreibbaren Schichten angeordnet ist.
  14. Ein Verfahren nach Anspruch 13, dadurch gekennzeichnet, dass sich die Höhe der Füllung um höchstens +/- 10% von der Tiefe der Öffnung unterscheidet.
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US5059245A (en) 1979-12-28 1991-10-22 Flex Products, Inc. Ink incorporating optically variable thin film flakes
US5084351A (en) 1979-12-28 1992-01-28 Flex Products, Inc. Optically variable multilayer thin film interference stack on flexible insoluble web
US5569535A (en) 1979-12-28 1996-10-29 Flex Products, Inc. High chroma multilayer interference platelets
US5383995A (en) 1979-12-28 1995-01-24 Flex Products, Inc. Method of making optical thin flakes and inks incorporating the same
US4838648A (en) 1988-05-03 1989-06-13 Optical Coating Laboratory, Inc. Thin film structure having magnetic and color shifting properties
DE10008851A1 (de) 2000-02-25 2001-08-30 Giesecke & Devrient Gmbh Verfahren zur Herstellung laserbeschriftbarer Datenträger und damit hergestellte Datenträger
EP1281538A3 (de) 2001-07-02 2004-01-28 MERCK PATENT GmbH Optisch variable Markierung
US20070246933A1 (en) 2004-08-12 2007-10-25 Giesecke & Devrient Gmbh Security Element Comprising a Support
EP1935663A1 (de) 2006-12-18 2008-06-25 Setec Oy Datenträger mit Sichtfenster und Verfahren zu seiner Herstellung
WO2014187825A2 (fr) 2013-05-21 2014-11-27 Hologram.Industries Composant d'identitification sécurisé et procédé de réalisation d'un tel composant
FR3022183B1 (fr) 2014-06-13 2016-07-29 Fasver Procede de fabrication d'un support de donnees multicouche a marquage de securite et pouvant etre marque par laser

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