EP0563992B1 - Verfahren und Vorrichtung zur Herstellung metallischer Flächenelemente auf Substraten - Google Patents
Verfahren und Vorrichtung zur Herstellung metallischer Flächenelemente auf Substraten Download PDFInfo
- Publication number
- EP0563992B1 EP0563992B1 EP93105519A EP93105519A EP0563992B1 EP 0563992 B1 EP0563992 B1 EP 0563992B1 EP 93105519 A EP93105519 A EP 93105519A EP 93105519 A EP93105519 A EP 93105519A EP 0563992 B1 EP0563992 B1 EP 0563992B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal layer
- intermediate carrier
- substrate
- layer
- lacquer
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
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- 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
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1039—Surface deformation only of sandwich or lamina [e.g., embossed panels]
Definitions
- the invention relates to a method and a device for the production of locally limited metal layers Substrates with a possibly rough surface in the transfer process, where the metal layers on one Prepared transfer area and then on the substrate be transmitted.
- Metallic surface elements come in the area of anti-counterfeiting of value documents a substantial Meaning too.
- metallic surfaces offer good reflection protection due to its reflective properties, because the reflective surfaces with copy technology Means cannot be adjusted. in the The simplest case is usually metal printing inks used to make shiny metallic surface or printed images to create. Because of the grainy fine structure these methods can only be used for metallic surfaces, where only minimal requirements are placed on the Reflection behavior of the surface and where no defined surface structures are required will.
- Holograms can be due the complex and costly manufacture, if imitated at all, only with relatively great effort and because of their optical properties, which depend on the viewing angle, good copy protection. Apart from the security aspects Holograms also like from an aesthetic point of view applied to documents of value.
- Reflection holograms are usually either using specially prepared embossing matrices that match the Interference pattern of the hologram corresponding surface relief have produced by the surface relief embossed in a hardened lacquer layer and then metallized and with a protective lacquer layer is provided.
- the relief of the embossing die can be used also directly into a thin metal layer embossed and then with the protective lacquer layer be provided. The metallization ensures sufficient Brilliance of the hologram, making it visually good is recognizable.
- Hot stamping tape from which it is transferred to the end carrier is (DE-OS 33 08 831, US-PS 4,758,296).
- a substrate with an easily removable Separating layer is provided, those to be transferred Layers in reverse order as later on the document should be available.
- the top one Layer forms an adhesive layer, for example one Heat seal adhesive layer. Be over this adhesive layer the hot stamping tape and the document under the influence of Heat and pressure combined. The substrate of the Hot stamping tape can then due to the separation layer be pulled off effortlessly.
- the transfer belt is made as a continuous belt will, d. H. the metallization in a continuous Process takes place (e.g. in a vacuum evaporation plant), only the desired areas transferred to the document.
- the transfer of to transferring surface areas can be different Species are accomplished.
- the adhesive layer is printed in a specific pattern be so that the layer structure to be transferred (if necessary with large-scale heating) only in places attached to the document or the one used in lamination Stamp has an outline shape that the conforming form, so that even when used of large-area heat seal adhesive only the areas of the adhesive layer are activated, to which the die applies pressure and heat (DE-OS 33 08 831).
- EP-OS 0 338 378 describes continuous process in which banknote paper in Roll form first printed on both sides and then in certain areas with a holographic structure is provided.
- the varnish to be embossed and transfer the relief structure to the paper at the same time, by the surface structure of the die is covered with a radiation-curable lacquer.
- the paint is cured with UV radiation or electron beam.
- the paint now adheres to the paper surface and has the holographic relief structure.
- this relief structure with the help of masks in metallized in a vacuum evaporation system.
- the hologram area is in a further step with a protective layer.
- thermoplastic Layer using a heated embossing die from one Transfer hot stamping foil to the document, at the same time the optical markings in the thermoplastic Layer are embossed.
- the carrier substrate is only peeled off after embossing and the relief structure then metallized.
- U.S. Patent 4,420,515 discloses a Process in which an already metallized paint surface is provided with a relief structure. An endless circulating transfer belt is continuously metallized and brought into contact with a document that selectively coats a varnish has been. The paint is hardened and binds the metal stronger than that Transfer ribbon and thus pulls the when separating transfer ribbon and document Metallization partially from this transfer belt. The final step is emboss the metallized lacquer area on the substrate.
- the embossed lacquer layer As the embossed lacquer layer is embossed, the embossed relief shows a low contour sharpness. The quality of the hologram is also impaired this procedure. Furthermore, the embossing must be carried out with high pressure so that the embossing dies are subject to high wear are.
- EP-OS 0 145 481 describes a method in which an embossing stamp vacuum-coated directly with a metal layer, the metallized stamp covered with liquid adhesive and pressed against a substrate, and the Adhesive layer is then cured.
- the invention is therefore based on the object of a method and a device for the application of metal layers which may be locally limited To create substrates while avoiding the disadvantages mentioned above.
- a method and a device for flexible hologram production is said to be based on difficult substrates and under difficult conditions will.
- the invention is based on the basic idea that the manufacture and the Transfer of a surface structure is only possible in optimal form, if the structures to be transferred are as pure as possible from the master structure are taken over and neither the transfer to the final substrate transferring structure still changed or damaged the structure of the master becomes.
- the creation takes place in this sense not by embossing the structure to be transferred an existing flat metal layer, but through "Depositing" the metal layer on the master structure, the metal layer resembling a cast all Fills in structural elements of the master structure and detected.
- Master and metal layer thus have negative and Positive structures that complement each other completely and that are intimately connected.
- About changes or damage during transfer or at To avoid detachment of the metal layer from the master the two structures were only separated, after which the metal layer is fixed on the final substrate and mechanically stabilized by the substrate and adhesive layer is.
- structure can be seen in general d. H. as a structure can be both extremely smooth reflecting surface as well as any relief structure Find use. It is important according to the invention that the selected or given structure if possible unadulterated as a positive or negative structure implemented and just as genuine on the substrate is transmitted.
- lacquer layer is intended to cover all materials and Capture substances that in the transfer of the metal layer in To make it so soft and sticky that the metal layer with its back without damage is impressive in the layer, whereby the Metal layer on the one hand intimately connects with the lacquer layer and any bumps between the substrate surface and back metal surface and on the other hand the metal layer adheres so firmly that, if necessary after an additional curing phase, the Metal layer are completely removed from the master can.
- a cylindrical Printing roller, an endless belt or a stamp etc. are used as a carrier of the master structure z. B.
- a cylindrical Printing roller, an endless belt or a stamp etc. are used as a carrier of the master structure z. B.
- the production of the metal layer takes place with the help of known metallization processes, such as Vacuum evaporation, electrolysis or photolysis as well other special processes that are used in technology under Special terms such as “Gas Jet Deposition (GJD)", “Spray Deposition”, “Laser deposition” etc. are known.
- GJD Garnier Deposition
- the Hardening the paint layer is different possible. This can happen when using a liquid hot melt adhesive for example, simply by cooling Multi-component paints by heating and depending on the use other substances also through other energy supply, e.g. B. by UV radiation, microwave radiation, Electron beam hardening etc.
- the method according to the invention is particularly suitable for the transfer of locally limited metal layers, because both the metallization and the transfer process can be precisely defined and structured locally.
- Photolytic ones are particularly advantageous for metallization Process, e.g. B. as in DE-OS 38 40 199 or DE-OS 38 40 200 described, which offer the possibility the metallic surface elements in their outline shapes particularly easy to modify, so that on this Way, in a particularly economical form series of different Surface elements or surface elements can be produced with varied additional information content are.
- the embossing roller according to the invention metallic coated. This results in another one inventive aspect. Because with the invention The process makes it possible for the first time to produce holograms or embossing, metallization of the embossed hologram and Transfer of the metallized hologram in a continuous Workflow.
- Fig. 1 shows in schematic form the basic principle of Invention.
- the master 1 has one any kind of surface structure 3, in the illustrated Case a surface relief, on this relief 3 a metal layer 2 is applied such that the Structure 3 in the metal layer 2 as an exact negative structure is present.
- the metal layer 2 is preferred locally limited or has a defined outline contour on.
- a substrate 4 is prepared in a second work station, that can be almost any medium. in the The present case is a security with glued, natural rough surface.
- a paint coater is another work station provided with either on the metal layer 2 or a locally limited one on the substrate 4 Lacquer layer can be applied.
- the local limit the lacquer layer preferably corresponds to that of Metal layer 2.
- both contours deviate from one another, taking note is that the metal layer only in the areas of Master is defined in which they are subtracted with the Paint layer is in cover.
- the lacquer layer 6 harden at least to the extent that sufficient Adhesion to metal layer 2 and substrate 4 and a Intrinsic strength is ensured, which is a deduction from Master while stabilizing the metal layer 2 enables.
- curing can take place by the lacquer layer 6 a heated Hot melt adhesive is made by cooling Master 1 and Metal layer 2 relatively quickly after merging stiffens.
- Substances can also be used in the same way under the influence of IR or UV rays, Harden microwaves, electron beams etc.
- the pressing in without additional measures and gluing the layers as well as peeling off and stabilizing the metal layer allows that final curing, if desired, also to one happen at any later time.
- FIG. 1 For reasons of clarity, in FIG. 1 and the other figures on a scale and detail Not shown. Rather, the figures show basic arrangements that carry out allow the inventive method. In the figures functionally identical elements with the same reference numbers Mistake.
- a cylindrical pressure roller with a smoother Partially metalized surface electrolytically and with an adhesive coated substrate in Brought in contact.
- the web-shaped substrate 4, in the present case paper, is conveyed by a transport system shown in Fig. 2 is indicated by the rollers 10. Before the web material 4 of the printing roller 11 is fed, passes through there is a paint coating station 5.
- the web 4 is here with the help of an engraving or stencil cylinder 12 in certain areas with a transparent adhesive coated.
- the substrate 4 passes through the transfer zone, that of the cylindrical transfer roller 11 and one cylindrical counter-pressure roller 13 is also formed.
- Metallized transfer roller 11 can additionally harden the adhesive, e.g. B. by polymerization with Electron beams or UV radiation take place.
- the metal coating is conveyed further 2 deducted from the intermediate carrier 11.
- a further processing station 14 can the metallized Area 2 but also, if necessary, the entire or larger areas of the material web 4 with be provided with a transparent protective lacquer layer.
- the one provided with metallic surface elements 2 Material web 4 can finally further printing stations 15 are supplied to them with alphanumeric characters or to print patterns, which may also be parts the metal coating 2 can cover.
- Suitable substances are, for example Fluorescent substances, magnetic or pearlescent pigments.
- FIG. 3 shows the layer structure of the metallized substrate 4 after passing through the protective lacquer coating station 14. Directly on the substrate 4 is the in Station 5 arranged locally applied adhesive layer 6. Because this layer 6 is transparent and very thin and therefore the visual impression of the end product not impaired, their areal expansion does not have to correspond exactly to the dimensions of the metallization 2.
- the expansion of the adhesive layer 6 not be smaller than the intended metallization 2, because this results in incomplete metal transfer would have.
- To the metallization 2 from abrasion and destruction to protect it is also made of a transparent Protective lacquer layer 16 covered.
- the intermediate carrier here the cylindrical roller 11, with those to be transferred metallic surface elements 2 provided.
- the transfer roller 11 is on electrolytic Metallized away.
- the parts of the cylinder, that should not be metallized are used in the Station 19 coated with electrically insulating material, e.g. B. with a layer of paint.
- electrically insulating material e.g. B. with a layer of paint.
- the pressure roller 11 seen next station the roller 11 passes through a galvanic bath 17.
- the in metal loosened in the bathroom is Transfer cylinder 11 and the voltage applied to the bath the electrically conductive surface areas of the roller 11 so that a metallic pattern on the roller surface arises.
- chemical residues are removed.
- the metal coating 2 is now transferred to the substrate 4.
- the Paint coating station 19 finally becomes roller 11 prepared for the next metallization cycle.
- Fig. 4 shows a metallization station in which the cylindrical transfer roller on photolytic Paths partially metallized and coated with an adhesive Substrate is brought into contact.
- the Vorund Aftertreatment of the substrate 4 and the transfer of metallic areas is analogous to the example 1. For this reason, an illustration has been given in FIG the corresponding additional processing stations waived.
- Photolysis is a modern metallization process that has been successful for several years in the metallic coating of semiconductor components (DE-OS 38 40 199) or in the manufacture of metal fleece to shield electrical fields (DE-OS 38 40 200) was used.
- the intermediate carrier 11 wetted with a palladium acetate film.
- a solvent such as B. chloroform
- spray or spin applied. 4 shows representative of a diving station 21. The solvent evaporates immediately and leaves a thin film of palladium acetate, whose thickness over the concentration of Solution and the application process can be set can.
- station 22 the ones to be metallized Areas of the printing roller exposed to UV radiation by selective photo splitting at the exposed areas to make a thin layer of palladium. This only a few nm thick palladium layer then serves as Activator for the subsequent chemical metallization, at which micrometer thick copper, nickel and gold layers can be applied.
- 4 is a Metallization bath 23 shown, in which the intermediate carrier roller 11 dips. In another variant can the metallization also by means of a suitable Printing process, e.g. B. in screen printing, on the intermediate carrier 11 can be printed directly.
- the finished substrate has the in this example same layer structure as in Example 1, based on 3.
- a printing roller with a smooth surface for example also a cylindrical high-pressure roller (letterpress) can be used as shown in Fig. 5. in the shown example, this roller is also after metallized photolytic process.
- this roller is also after metallized photolytic process.
- the process steps for metallizing the high pressure roller 26 are analogous to example 2.
- the sublime Areas 27 of the pressure roller 26 are made with palladium acetate 21 wetted and according to the transfer Information irradiated over a large area with UV light 22. This in metal dissolved in the plating bath 23 opens up the activated areas while the unexposed areas Areas cleaned in the cleaning station 24 will.
- Printing areas 27 is previously on the substrate applied adhesive hardened and thus binds the Metal layer 2 to the substrate 4. Before the metallization cycle starts again, the print areas 27 completely cleaned in station 25.
- FIG. 6 which is shown in Fig. 6, serves an endless belt 28 with a smooth surface as an intermediate carrier, which is partially electrolytic metallized and with the adhesive-coated substrate 4 is brought into contact.
- the substrate is here only with a Component 29 of the metal coating 2 from the intermediate carrier 28 peeling lacquers locally coated. Subsequently the substrate 4 becomes analogous to the previous ones Examples transported through the transfer zone and possibly aftertreated in accordance with Example 1.
- the metallization station consists of an endless belt 28 running over the rollers 30, 31, that is electrolytically metallized.
- the endless belt 28 is prepared in the stations 20 and 19 and then locally in the galvanic bath 17 metallized.
- metallization 2 becomes the second Component 32 of the releasing lacquer, e.g. B. an adhesion promoter for the metal layer to be transferred and / or a hardener for the first component.
- the two components in the transfer zone causes the diffusion of the hardener together with energy supply, to match the substances used in each case is an accelerated curing and a very good binding of the transferred metal layer to the substrate.
- This two-component adhesive can of course also be used all other examples described are used.
- FIG. 7 shows another variant of a metallization station.
- the pretreatment or post-treatment of the substrate 4 take place analogously to example 1.
- FIG. 7 shows therefore only for the metallization of the endless belt 28 necessary devices and the the transfer zone forming rollers 13 and 30.
- the partial metallization of the intermediate carrier 28 happens here analogously to Example 2 after the photolytic Method.
- the endless belt 28 is with the Palladium acetate film 21 wetted by UV radiation 22 in places for the metal deposition in the metallization bath 23 is activated. Stations 24 and 25 ensure that the belt is cleaned as already described 28
- the representation in FIG. 8 is also limited to the metallization station and the transfer zone.
- the endless belt 28 serving as an intermediate carrier becomes partially through a vacuum coating over masks metallized.
- the tape 28 is in before each metallization cycle Station 33 cleaned of any metal residues. Conditioning the areas to be coated are in the vacuum chamber 34 itself, if necessary, with the help of masks 35. As a vacuum coating process can do both vacuum evaporation and cathode ray sputtering (Sputtering) used will. The transfer of the metallic areas proceeds as already explained, by curing or cooling the Adhesive in the contact zone of substrate 4 and endless belt 28 between the rollers 13 and 30.
- the intermediate carrier is used as an embossing mold trained, d. H. he carries on his surface the diffractive relief structure, which according to the state of the Technology is embossed into the paint on the substrate.
- the paint can also be applied the metallized areas of the intermediate carrier applied and simultaneously with the metal layer on the Substrate are transferred.
- the inventive metallization of the insensitive Embossing instead of the sensitive substrate allows it chemical metallization with aggressive chemicals perform.
- the following examples show metallization stations described as such Have embossed intermediate carrier.
- a cylindrical pressure roller with a relief-like surface structure becomes partial or full electrolytic metallized and coated with an adhesive Contacted substrate.
- the device shown in Fig. 2 can in principle be taken over. Only the cylindrical pressure roller 11 must have a relief surface corresponding to the hologram exhibit.
- the substrate 4, e.g. B. a paper web is preferred with an engraving or template cylinder 12 placed, locally coated with a varnish 5 on the places where the hologram should be embossed. Subsequently, the substrate 4 in the embossing and Metal transfer zone between the pressure roller 13 and the metallized die 36 transported.
- the cylindrical Embossing mold 36 has the hologram embossing structure placed in register with respect to the locally coated Surfaces of the substrate 4.
- the surface relief of the embossing die 36 is after the Electrolytic processes already described in Example 1 fully or partially metallized.
- the Metallization can also be carried out over the entire area because the register-accurate transfer by the coated Places on the substrate 4 is determined. A sharper one Contouring of the metal surfaces 2 is however by partial Metallization of the embossing mold 36 is achieved.
- the relief structure becomes detachable and metallized transferred true to the original into the paint.
- the paint is cured e.g. B. by cooling, UV radiation or polymerization with electron beams.
- the hardened lacquer layer is drawn the metallization from the die 36.
- Example 2 and FIG. 4 becomes the cylindrical pressure roller with a smooth surface 11 by a likewise cylindrical Embossing die 36 replaced and photolytically metallized.
- the metallization devices described in Examples 4-6 which is an endless belt as an intermediate carrier can be used in the combined hologram embossing or metallization used according to the invention will.
- the endless belt 28 carries in these cases the hologram relief structure.
- Fig. 9 shows a section of the on photolytic Path metallized embossing tape 37 (Fig. 7) before using it is brought into contact with the substrate 4.
- the endless belt 37 has a relief structure 38.
- Above the relief structure 38 there is a thin palladium layer 39, by photolytically decomposing the palladium acetate film arose. The unexposed areas of this Films were removed in station 24.
- the photolytic metallization of the embossing mold offers how already explained the possibility of finely structured to produce metallic surfaces. This fact is too especially when designing holograms in combination with other features of great advantage. So it can Hologram, for example with a line or guilloche frame be provided or rasterized so that a background print remains visible. It would also be conceivable Cutouts in the form of characters or patterns to be provided in the metallization. Because of the variable Exposure options of the palladium acetate film could also a sequential numbering in the form of metallic Numerals can be provided on the hologram.
- Another basic variant is based on the Waive substrate.
- the paint cured directly on the metallic intermediate carrier and with the metal layer as a self-supporting film deducted.
Landscapes
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Holo Graphy (AREA)
- Credit Cards Or The Like (AREA)
- Physical Vapour Deposition (AREA)
- Chemically Coating (AREA)
Description
- daß auf der Master-Struktur eine 1 : 1-Reproduktion durch Ablagern der Metallschicht erzeugt wird,
- daß entweder auf der Metallschicht oder dem Substrat eine Lackschicht aufgebracht wird, die zu dem Zeitpunkt, zu dem Substrat und Master in Berührung gebracht werden, ausreichend weich und klebrig ist und
- daß das Substrat zusammen mit der Metallschicht vom Master abgezogen wird, wobei die Lackschicht so weit dimensionsstabil ist, daß sie ein Abziehen der Metallschicht vom Master ermöglicht und die Metallschicht auch nach Trennung vom Master soweit stabilisiert, daß die vom Master übernommenen Strukturen erhalten bleiben.
- Konditionierung des Zwischenträgers, d. h. Ergreifen von auf das Metallisierungsverfahren abgestimmten Maßnahmen zur Auswahl der zu metallisierenden Bereiche des Zwischenträgers,
- Metallisierung des Zwischenträgers,
- Transfer der lokalen Metallschichten auf das Substrat,
- Reinigen des Zwischenträgers.
- die flächige Sensibilisierung des Masters mit einem Katalysator bzw. Precursor, z. B. Palladiumacetat,
- die optische Aktivierung des Palladiumacetats mit UV-Strahlung sowie
- die Metallabscheidung in den sensibilisierten und aktivierten Flächenbereichen.
- Fig. 1
- das erfindungsgemäße Grundprinzip,
- Fig. 2
- elektrolytische Metallisierung einer zylindrischen Druckwalze bzw. Prägeform und Transfer der Metallisierung auf ein ein Substrat,
- Fig. 3
- Schichtaufbau des Substrats nach dem Metalltransfer,
- Fig. 4
- photolytische Metallisierung einer zylindrischen Druckwalze bzw. Prägeform,
- Fig. 5
- photolytische Metallisierung einer zylindrischen Hochdruckwalze und Transfer der Metallisierung auf ein Substrat,
- Fig. 6
- elektrolytische Metallisierung eines endlosen Druck- nzw. Prägebandes und Transfer der Metallisierung auf ein Substrat,
- Fig. 7
- photolytische Metallisierung eines endlosen Druck- bzw. Prägebandes,
- Fi.g 8
- metallische Vakuumbedampfung eines endlosen Druck- bzw. Prägebandes,
- Fig. 9
- Schichtaufbau eines photolytisch metallisierten Prägebandes.
- Die "Master"-Oberflachenstruktur darf keine "Unterschneidungen", "Hohlungen" oder "Überhänge" aufweisen, sondern nur einfache "Berge" und "Täler". Dies ist bei glatten Oberflächen oder bei Hologrammreliefs gegeben.
- Die "Master"-Substanz und die Metallisierungssubstanz dürfen chemisch nicht zu eng verwandt sein, z. B. ist Kupfer auf Messing ungeeignet, Kupfer auf Aluminium oder auf vielen Kunststoffen geeignet für die Herstellung einer lösbaren Verbindung.
- Durch Anpassung der Schichtstärke und des Aktivierungsgrades des Precursors bei der photolytischen Metallisierung läßt sich die Lösbarkeit der Metallschicht einstellen.
- Durch die Stromstärke und damit durch die Schnelligkeit der Ablagerung läßt sich bei der elektrolytischen Beschichtung die Haftung der Schicht einstellen. Eine schnelle Ablagerung ergibt eine lösbare Schicht.
- Bei Aufdampfen einer Metallisierung erhält man durch vorheriges Aufbringen einer monomolekularen Schicht eines Trennmittels eine lösbare Schicht, falls man nicht vorzieht, die Masterform direkt aus einer Substanz herzustellen, die eine schlechte Haftung für die Metallbedampfung bietet.
- des Zwischenträgers (zylindrische Druckwalze, Endlosband, Stempel),
- der Struktur (hochglanzend, Grobstruktur, Mikrostruktur, Hologramm, Beugungsgitter etc.),
- des Metallisierungsverfahrens,
- der Art der lokalen Begrenzung (begrenzte Metallschicht auf dem Master oder begrenzte Kleberschicht),
- der Plazierung des Klebers (auf Metallschicht oder Substrat),
- des Klebers und des zugehörigen Aushärteverfahrens,
- der zusätzlichen Schritte zur Stabilisierung etc.
Claims (23)
- Verfahren zur Herstellung von einer eine definierte Oberflächenstruktur (3, 38) aufweisende Metallschicht (2) auf einem Substrat (4), wobei die Metallschicht (2) auf einem Zwischenträger (11, 26, 28, 36, 37) in lösbarer Form vorbereitet und anschließend auf das Substrat (4) übertragen wird, gekennzeichnet durch folgende Schritte:a) Ausstatten des Zwischenträgers (11, 26, 28, 36, 37) mit einer Masterstruktur (3, 38), wobei der Zwischenträger (11, 26, 28, 36, 37) ein kontinuierlich umlaufendes Medium ist,b) Aufbringen der Metallschicht (2) auf die Masterstruktur (3, 38) des Zwischenträgers (11, 26, 28, 36, 37),c) Beschichten des Substrats (4) oder der Metallschicht (2) mit einer Lackschicht (6),d) Zusammenführen der Metallschicht (2), der Lackschicht (6) und des Substrats (4) in einem Stadium, in dem die Lackschicht (6) in ausreichend weicher und klebriger Form vorliegt,e) Verfestigen der Lackschicht (6),f) Trennen von Zwischenträger (11, 26, 28, 36, 37) und Substrat (4) bei gleichzeitigem Abziehen der mit der Lackschicht (6) in Berührung stehenden Metallschicht (2) vom Zwischenträger (11, 26, 28, 36, 37).
- Verfahren zur Herstellung von einer eine definierte Oberflächenstruktur aufweisende Metallschicht auf einem Substrat, wobei die Metallschicht auf einem Zwischenträger in lösbarer Form vorbereitet und anschließend auf das Substrat übertragen wird, gekennzeichnet durch folgende Schritte:a) Ausstatten des Zwischenträgers mit einer Masterstruktur,b) Aufbringen der Metallschicht auf die Masterstruktur des Zwischenträgers,c) Beschichten der Metallschicht mit einer Lackschicht,d) Verfestigen der Lackschicht,e) Trennen von Zwischenträger und Lackschicht bei gleichzeitigem Abziehen der mit der Lackschicht in Berührung stehenden Metallschicht vom Zwischenträger, wobei die verfestigte Lackschicht als selbsttragende Folie das Substrat darstellt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Substrat (4) vor dem Schritt c) im zu beschichtenden Bereich geglättet wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Zwischenträger (11, 26, 38) mit einer extrem glatten Oberfläche ausgestattet wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Zwischenträger (36, 37) mit einem Oberflächenrelief (39) in Form einer Beugungsstruktur, insbesondere eines Hologramms, ausgestattet wird.
- Verfahren nach wenigsten einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Metallschicht (2) durch Fotolyse, Elektrolyse, gas jet deposition, spray deposition oder laser deposition erzeugt wird.
- Verfahren nach wenigstens einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Verfestigen der Lackschicht (6) durch eine Temperaturänderung, durch UV-, Mikrowellen- oder Elektronenstrahlung erfolgt.
- Verfahren nach wenigstens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Substrat (4) nach dem Aufbringen der Metallschicht (2) einer Nachbehandlung unterworfen wird.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß das Substrat (4) im Bereich der Metallschicht (2) mit einem Schutzlack versehen wird.
- Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß das Substrat (4) gegebenenfalls auch im Bereich der Metallschicht (2) bedruckt oder mit einer Blindprägung versehen wird.
- Verfahren nach wenigstens einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Masterstruktur (3, 38) auf einer zylindrischen Druckwalze, einem Hochdruckzylinder oder einem Endlosband erzeugt wird.
- Verfahren nach wenigstens einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Metallschicht (2) in lokal begrenzter Form auf dem Zwischenträger (11, 26, 28, 36, 37) erzeugt wird.
- Vorrichtung zum Herstellen von einer mit einer definierten Oberflächenstruktur versehenen Metallschicht auf einem Substrat, wobei die Metallschicht auf einem Zwischenträger vorbereitet und anschließend auf das Substrat übertragen wird, dadurch gekennzeichnet, daß die Vorrichtung folgende Einrichtungen aufweist:a) einen mit einer Masterstruktur versehenen, kontinuierlich umlaufenden Zwischenträger, auf welchem die Metallschicht in lösbarer Form erzeugt wird,b) eine aus wenigstens einer Station bestehende Vorrichtung zur Aufbringung der Metallschicht auf den mit der Masterstruktur versehenen Zwischenträger,c) eine Station zur Lackbeschichtung des Zwischenträgers,d) eine Vorrichtung zuin Verfestigen der Lackschicht,e) eine Vorrichtung zum Trennen der verfestigten Lackschicht und des Zwischenträgers, wobei die Metallschicht, welche in Kontakt mit der Lackschicht steht, vom Zwischenträger abgezogen wird und die verfestigte Lackschicht als selbsttragende Folie das Substrat bildet.
- Vorrichtung zum Herstellen von einer mit einer definierten Oberflächenstruktur (3, 38) versehenen Metallschicht (2) auf ein Substrat (4), wobei die Metallschicht (2) auf einen Zwischenträger (11, 26, 28, 36, 37) vorbereitet und anschließend auf das Substrat (4) übertragen wird, dadurch gekennzeichnet, daß sie folgende Einrichtungen aufweist:a) einen mit einer Masterstruktur (3, 38) versehenen, kontinuierlich umlaufenden Zwischenträger (11, 26, 28, 36, 37), auf dem die Metallschicht (2) in lösbarer Form erzeugt wird,b) eine aus wenigstens einer Station bestehende Vorrichtung (17, 18, 19, 20, 21, 22, 23, 24, 25) zur Aufbringung der Metallschicht (2) auf den mit der Masterstruktur (3, 38) versehenen Zwischenträger (11, 26, 28, 36, 37),c) eine Station (5, 12) zurLackbeschichtung des Substrats und/oder der Metallschicht,d) eine Station (11, 13, 30, 31) zum vorübergehenden Zusammenführen von Zwischenträger (11, 26, 28, 36, 37) und Substrat (4),e) eine Vorrichtung zum vollständigen Verfestigen der Lackschicht (6) an der Stelle, an der die Metallschicht (2) auf dem Träger über die noch weiche, klebrige Lackschicht (6) mit dem Substrat (4) in innigen Kontakt gebracht wird.
- Vorrichtung nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß der Zwischenträger (36, 37) ein Oberflächenrelief in Form einer Beugungsstruktur, insbesondere eines Hologramms, aufweist.
- Vorrichtung nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß der Zwischenträger (11, 26, 28) eine extrem glatte Oberfläche aufweist.
- Vorrichtung nach wenigstens einem der Ansprüche 13 bis 16, dadurch gekennzeichnet, daß der Zwischenträger eine zylindrische Druckwalze (11, 36), ein Endlosband (28) oder ein Hochdruckzylinder (26) ist.
- Vorrichtung nach wenigstens einem der Ansprüche 13 bis 17, dadurch gekennzeichnet, daß die Vorrichtung b) zur Aufbringung der Metallschicht (2) auf dem Zwischenträger (11, 26, 28, 36, 37) folgende Einrichtungen aufweist:f) eine Beschichtungsstation (19), um die nicht zu beschichtenden Bereiche des Zwischenträgers (11, 26, 28, 36, 37) mit elektrisch isolierendem Material zu versehen,g) ein elektrolytisches Bad (17), um die elektrisch leitenden Bereiche des Zwischenträgers (11, 26, 28, 36, 37) metallisch zu beschichten.
- Vorrichtung nach Anspruch 18, dadurch gekennzeichnet, daß vor der Station f) und eventuell nach der Station g) Reinigungsvorrichtungen (18, 20) vorgesehen sind.
- Vorrichtung nach wenigstens einem der Ansprüche 13 bis 17, dadurch gekennzeichnet, daß die Vorrichtung b) zur Aufbringung der Metallschicht (2) auf den-Zwischenträger (11, 26, 28, 36, 37) folgende Einrichtungen aufweist:f) Benetzungsstation (21), um den Zwischenträger (11, 26, 28, 36, 37) mit einem Palladiumacetat-Film zu benetzen,g) UV-Belichtungsstation (22) um das Palladiumacetat gegebenenfalls lokal zu aktivieren,h) Metallauftragsstation (23), uni die belichteten Palladiumacetat-Bereiche zu metallisieren.
- Vorrichtung nach Anspruch 20, dadurch gekennzeichnet, daß vor der Station f) und eventuell nach der Station h) eine Reinigungsvorrichtung(24, 25) vorgesehen ist.
- Verwendung der Vorrichtung nach wenigstens einem der Ansprüche 13 bis 21 zur Herstellung eines Datenträgers,vorzugsweise aus Sicherheitspapier.
- Verwendung des Verfahrens nach wenigstens einem der Ansprüche 1 bis 12 zur Herstellung eines Datenträgers, vorzugsweise aus Sicherheitspapier.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE4211235 | 1992-04-03 | ||
DE4211235A DE4211235C2 (de) | 1992-04-03 | 1992-04-03 | Verfahren und Vorrichtung zur Herstellung metallischer Flächenelemente auf Substraten und deren Verwendung |
Publications (3)
Publication Number | Publication Date |
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EP0563992A2 EP0563992A2 (de) | 1993-10-06 |
EP0563992A3 EP0563992A3 (en) | 1995-01-18 |
EP0563992B1 true EP0563992B1 (de) | 1998-07-15 |
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EP93105519A Expired - Lifetime EP0563992B1 (de) | 1992-04-03 | 1993-04-02 | Verfahren und Vorrichtung zur Herstellung metallischer Flächenelemente auf Substraten |
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US (1) | US5807456A (de) |
EP (1) | EP0563992B1 (de) |
JP (1) | JP3049646B2 (de) |
AT (1) | ATE168327T1 (de) |
DE (2) | DE4211235C2 (de) |
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-
1992
- 1992-04-03 DE DE4211235A patent/DE4211235C2/de not_active Expired - Fee Related
-
1993
- 1993-04-02 EP EP93105519A patent/EP0563992B1/de not_active Expired - Lifetime
- 1993-04-02 DE DE59308760T patent/DE59308760D1/de not_active Expired - Fee Related
- 1993-04-02 AT AT93105519T patent/ATE168327T1/de not_active IP Right Cessation
- 1993-04-05 JP JP5078345A patent/JP3049646B2/ja not_active Expired - Fee Related
-
1996
- 1996-12-02 US US08/767,599 patent/US5807456A/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8242006B2 (en) | 2007-12-21 | 2012-08-14 | General Electric Company | Smooth electrode and method of fabricating same |
Also Published As
Publication number | Publication date |
---|---|
DE59308760D1 (de) | 1998-08-20 |
JP3049646B2 (ja) | 2000-06-05 |
ATE168327T1 (de) | 1998-08-15 |
JPH0679987A (ja) | 1994-03-22 |
DE4211235C2 (de) | 2003-04-17 |
DE4211235A1 (de) | 1993-12-02 |
EP0563992A3 (en) | 1995-01-18 |
EP0563992A2 (de) | 1993-10-06 |
US5807456A (en) | 1998-09-15 |
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