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
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/425—Marking by deformation, e.g. embossing
• • 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
  • B42D25/328—Diffraction gratings; Holograms
• • B42D2033/24—
• • 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
  • B42D25/324—Reliefs

Definitions

• the invention relates to a process for the production of partial surface structures.
• Surface structures are understood to mean diffraction structures, reflection structures, holograms, kinegrams, diffraction structures and the like.
• partial surface structures For the production of partial surface structures, several methods are known. On the one hand, a partial origination can be produced, ie no full-surface pattern can be produced on the embossing mold. However, this method is very expensive.
• embossing lacquer layer only partially in the desired areas, so that embossing can take place only in the areas coated with the embossing lacquer.
• embossing lacquer layer only partially in the desired areas, so that embossing can take place only in the areas coated with the embossing lacquer.
• the embossed layer is then either fully or partially metallized.
• the hologram structures are still easily visible, which impairs the appearance of the partial hologram structure.
• the object of the invention was to provide a simple and flexible method for producing partial surface structures.
• the carrier substrates are for example carrier films, preferably flexible transparent plastic films, for example of P1, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC in question.
• the carrier films preferably have a thickness of 5 to 700 .mu.m, preferably 5 to 200 .mu.m, particularly preferably 5 to 50 .mu.m.
• metal foils for example Al, Cu, Sn, Ni, Fe or stainless steel foils having a thickness of 5-200 ⁇ m, preferably 10 to 80 ⁇ m, particularly preferably 20-50 ⁇ m, may also serve as the carrier substrate.
• the films can also be surface-treated, coated or laminated, for example, with plastics or painted.
• carrier substrates also paper or composites with paper, for example, composites with plastics with a grammage 20-500 g / m 2, preferably 40-200 g / m 2. be used.
• woven or nonwovens such as continuous fiber webs, staple fiber webs and the like, which may possibly be needled and / or calendered, can be used as carrier substrates.
• fabrics or webs of plastics such as PP, PET, PA, PPS and the like, but it can also be woven or nonwovens of natural, optionally treated fibers, such as Viskosefasem be used.
• the nonwovens or fabrics used have a weight per unit area of about 20 g / m 2 to 500 g / m 2 . If necessary, the nonwovens or fabrics must be surface-treated.
• carrier substrate is coated with a radiation-curable lacquer in a coating or printing process such as, for example, a roller coating or a screen printing, gravure or flexographic printing process. Furthermore, register and control marks for the subsequent processing operations are applied to the carrier substrate.
• the radiation-curable lacquer can contain, for example, a radiation-curable lacquer system based on a polyester, an epoxy or polyurethane system containing 2 or more different photoinitiators familiar to the person skilled in the art, which can initiate curing of the lacquer system to varying degrees at different wavelengths.
• a photoinitiator can be activated at a wavelength of 200 to 400 nm, the second photoinitiator then activatable at a wavelength of 370 to 600 nm. Sufficient difference should be maintained between the activation wavelengths of the two photoinitiators to prevent over-excitation of the second photoinitiator while the first photoinitiator is activated.
• the region in which the second photoinitiator is excited should be in the transmission wavelength range of the carrier substrate used.
• electron radiation can be used for the main curing (activation of the second photoinitiator) also electron radiation can be used.
• a water-thinnable varnish can also be used. Preference is given to polyester-based paint systems.
• the impression of the surface structure for example, at controlled temperature by means of a die or using a stamping mold in the radiation-curable lacquer layer, which was pre-cured by activation of the first photoinitiator to the gel point and at the time of the impression is at this stage. If a water-dilutable radiation-curable lacquer is used, it is optionally possible to precede predrying, for example by means of IR radiators.
• the layer thickness of the applied radiation-curable lacquer can vary depending on the requirements of the end product and thickness of the substrate and is generally between 0.5 and 50 .mu.m, preferably between 2 and 10 .mu.m, more preferably between 2 and 5 .mu.m.
• embossed structure is now applied in those areas where the embossed structure should not appear in the final product a topcoat.
• the surface structure is leveled in the areas of the paint application.
• overcoat for example, polymeric coating compositions come into question.
• the application of the overcoat is preferably carried out by means of a so-called insetter method, preferably in a gravure printing process, wherein the provided with register marks and control lines web is measured via an upstream measuring device between two or more register marks in length and then the material web of a control loop, in particular a register over a register roller is controlled in register before the printing unit, wherein the page register on a web control is pre-controlled and controlled by a swing frame, and the material web is printed register and registration register with the topcoat.
• a so-called insetter method preferably in a gravure printing process
• the provided with register marks and control lines web is measured via an upstream measuring device between two or more register marks in length and then the material web of a control loop, in particular a register over a register roller is controlled in register before the printing unit, wherein the page register on a web control is pre-controlled and controlled by a swing frame, and the material web is printed register and registration register with the topcoat.
• step c a solvent-soluble ink or color coat is applied by means of an inset process, preferably in a gravure printing process, congruently with the printing with the overdack.
• the ink or lacquer used is soluble in a solvent, preferably water, but it is also possible to use a dye soluble in any solvent, for example in alcohol, esters and the like.
• the color or the colored lacquer can be customary compositions based on natural or artificial macromolecules.
• the soluble color may be pigmented or unpigmented.
• pigments all known pigments can be used. Particularly suitable are TiO 2 , ZnS, kaolin and the like
• the printed carrier substrate may be treated by means of an inline plasma (low pressure or atmospheric plasma), corona or flame process. This improves the adhesion of metals and the like to the surface.
• inline plasma low pressure or atmospheric plasma
• corona or flame process This improves the adhesion of metals and the like to the surface.
• a thin metal or metal oxide layer can be applied as adhesion promoter, for example by sputtering or vapor deposition.
• adhesion promoter particularly suitable are Cr, Al, Ag, Ti, Cu, TiO 2 , Si oxides or chromium oxides.
• This adhesion promoter layer generally has a thickness of 0.1 nm to 5 nm, preferably 0.2 nm to 2 nm, particularly preferably 0.2 to 1 nm.
• This layer consists of a metal, a metal compound or an alloy with suitable reflection properties.
• the metal layer layers of Al, Cu, Fe, Ag, Au, Cr, Ni, Zn and the like are suitable.
• suitable metal compounds are oxides or sulfides of metals, in particular TiO 2 , Cr oxides, ZnS, ITO, ATO, FTO, ZnO, or Al 2 O 3 .
• Suitable alloys are, for example, Cu-Al alloys, Cu-Zn alloys and the like.
• This metallic layer can be applied by known methods such as sputtering, sputtering, printing (gravure, flexographic, screen, digital printing and the like), spraying, electroplating and the like.
• the process according to the invention for producing partial surface structures can be carried out economically and flexibly.
• motivident cylinders are required for the application of the two layers.
• the carrier substrates produced according to the invention may optionally be used after packaging as security elements, in particular in value documents and data carriers, for example banknotes, securities, identity documents, cards and the like, or used as security elements or security labels in packaging, textiles, seals and the like.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Printing Methods (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Manufacturing Of Magnetic Record Carriers (AREA)

Priority Applications (3)

Applications Claiming Priority (1)

Publications (2)

Family

ID=34933997

Family Applications (1)

Country Status (3)

Citations (4)

• 2005
  • 2005-03-01 DE DE502005001372T patent/DE502005001372D1/de active Active
  • 2005-03-01 EP EP05004401A patent/EP1698486B1/fr not_active Not-in-force
  • 2005-03-01 AT AT05004401T patent/ATE371545T1/de active

Patent Citations (4)

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