Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
  • B41C1/00—Forme preparation
  • B41C1/02—Engraving; Heads therefor
  • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M1/00—Inking and printing with a printer's forme
  • B41M1/10—Intaglio printing ; Gravure printing
• • 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
• • 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
  • B41M3/16—Braille printing

Definitions

• the invention relates to a method for producing a rotative gravure printing plate for continuous printing of substrates.
• the objects, lines, images, letters, logos and the like to be printed are produced by producing indentations (engraving), usually in endless gravure cylinders, the depressions being separated from one another by webs.
• depressions are then filled with the paint to be printed or the paint to be printed.
• excess paint or excess paint are usually removed with the help of a doctor blade.
• the printing material to be printed is then pressed by means of the press cylinder to the gravure cylinder and so transferred the color or the paint on the substrate.
• the ink layer thickness transferred to the substrate varies.
• an electrostatic printing aid With the help of an electrostatic printing aid, a better emptying behavior can be achieved.
• the object of the invention was therefore to provide a method for producing tactile print images in rotary gravure printing, wherein the image of the printed image is in continuous printing.
• the invention therefore provides a process for producing tactile print images in an endless gravure printing process, characterized in that that the image original is detected by a scanner, converted into a data file and transferred by means of an exposure method, a laser engraving method, an electron beam engraving method, a DC-modulated diamond engraving method, a laser ablation method, or directly to an endless gravure cylinder to produce endless intagliostructures, whereupon the Printing on a substrate with a paint or a varnish by gravure printing.
• Another object of the invention are articles, such as packaging, documents of value, data carriers, which have a tactile print image.
• value documents and data carriers are understood, for example, banknotes, vouchers, tickets, tickets, identity documents, cards and the like.
• a method is preferably used in which a corresponding cylinder is imaged or directly structured using the laser or electron beam technology in accordance with the patterns, images, lines, letters, shapes and the like desired on the substrate.
• a graphic drawing or the like serves as the image template.
• an image template for example a photograph and the like, is converted into a hand-modulated line grid.
• This image (line grid) is then scanned in and a corresponding data file is generated.
• the corresponding image for example, an 8-bit grayscale image via an appropriate detection device, such as a scanner, such as an EBV scanner, such as Hell Graphics Systems S3300 read into an electronic image processing program such as Hell Linocolor or Adobe Photoshop.
• the corresponding grayscale image may also be electronically transmitted by suitable software, e.g. Adobe Illustrator, Corel Draw, Freehand and so on.
• suitable software e.g. Adobe Illustrator, Corel Draw, Freehand and so on.
• the desired grayscale image is then printed in a suitable software program, for example in Barco Fortuna, with the appropriate geometrical shapes, e.g. Gulliochen, sinewaves, stripes, etc. connected.
• a suitable software program for example in Barco Fortuna, with the appropriate geometrical shapes, e.g. Gulliochen, sinewaves, stripes, etc. connected.
• About the lineweight function provided by the appropriate software, e.g. Variable Linewith Generator now modulates the graphical element depending on the gray level value.
• the image produced in this way is now exposed to a prepared cylinder in a corresponding exposure system, for example.
• a gravure cylinder with a core of iron tube with a wall thickness of 20 mm, and the following layers: 5-7 micron nickel layer, 300 micron copper layer; existing photosensitive layer with the corresponding patterns, shapes, lines, letters in the form of the previously defined grid imaged, developed and etched.
• the coating of the cylinder is carried out in the usual way with a Kunststoffübertragungsrad, or by spraying, rolling, brushing, dipping, or by means of a curtain coating process, preferably in a layer thickness of 2-10 microns with a commercially available photosensitive composition, for example, LD 100, OHKA Kogyo Ltd ,
• the cylinder is provided with an overcoat with a layer thickness of 1 - 5 microns, for example with OC-40 (OHKA Kogyo Ltd) or with an analogous similar commercial composition.
• the development takes place after the exposure in the usual manner, for example, contactless with sodium carbonate (0.5% solution), this is usually followed by a cleaning process with water, after which the cylinder is dried.
• etching following the laser beam imaging reflects the image, patterns, shapes and the like defined by the laser beam imaging on the surface of the cylinder.
• the etching can be carried out in various ways, for example by means of a Fe (III) chloride solution or a Cu (II) chloride solution, optionally with the addition of HCl or H 2 SO 4 . If appropriate, commercially available and known additives for flank protection can also be added to the etching solution.
• the endless intagliostructures produced in this way can have a depth of 15 to 250 ⁇ m, depending on the duration of the etching.
• the duration of the action of the etchant depends on the etchant used and is for example when using a Cu-chloride solution with the addition of an acid about 90 - 2400 sec.
• the cylinder looks blunt and visually dark after the etching process.
• a surface treatment with electrolytic or chemical shining the impression structure can be finished and a brilliant print quality can be achieved.
• a laser engraving process or electron beam engraving process for example by the Hell or Datwyler process
• engrave the image directly into the surface of the cylinder for example of copper, zinc, plastic, etc.
• the image can also by a DC-modulated diamond engraving process (eg Transcribe®, Ohio), or Laser ablation process (eg Schepers) followed by etching, are transferred to the cylinder.
• the substrate is then provided with the tactile print image.
• carrier films preferably flexible transparent plastic films, for example, from PI, 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, can serve as the printing substrate.
• the films can also be surface-treated, coated or laminated, for example, with plastics or painted.
• paper or composites with paper for example composites with plastics having a weight per unit area of 20 to 500 g / m 2 , preferably 40 to 200 g / m 2, can also be used as printing material. be used.
• substrates or nonwovens such as continuous fiber webs, staple fiber webs and the like, which may optionally be needled and / or calendered, can be used as printing materials.
• fabrics or webs of plastics such as PP, PET, PA, PPS and the like, but it can also be woven or nonwovens made of natural, optionally treated fibers, such as viscose fibers are 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.
• customary paints and lacquers which in addition may also have functional properties, for example optical, electrically conductive, magnetic or adhesive properties.
• functional properties for example optical, electrically conductive, magnetic or adhesive properties.
• special intaglio or offset inks can also be used.
• metal pigments for example, copper, aluminum, silver, gold, iron, chromium and the like
• metal alloys such as copper-zinc or copper-aluminum or amorphous or crystalline ceramic pigments such as ITO, FTO, ATO and the like
• doped or non-doped semiconductors such as, for example, silicon, germanium, gallium arsenide, arsenic or ion conductors such as amorphous or crystalline metal oxides or metal sulfides can also be used as an additive.
• polar or partially polar compounds such as surfactants, or nonpolar compounds such as silicone additives or hygroscopic or non-hygroscopic salts may be used or added to adjust the electrical properties of the layer.
• nonpolar compounds such as silicone additives or hygroscopic or non-hygroscopic salts
• intrinsically conductive organic polymers such as polyaniline, polyacetylene, polyethylene dioxythiophene and / or polystyrene sulfonate and derivatives thereof. These polymers over the entire surface or partially, in the form of lines and the like are then applied to enhance the electrical properties.
• paramagnetic, diamagnetic and also ferromagnetic substances such as iron, nickel, barium, and cobalt or their compounds or salts (for example, oxides or sulfides) can be used.
• iron, nickel, barium, and cobalt or their compounds or salts for example, oxides or sulfides
• ferromagnetic substances such as iron, nickel, barium, and cobalt or their compounds or salts (for example, oxides or sulfides)
• Fe (II) and Fe (III) oxides, barium or cobalt ferrites, rare earths and the like are especially suitable.
• the optical properties of the layer can be visualized by visible colors or pigments, luminescent dyes or pigments which fluoresce or phosphoresce in the visible, in the UV region or in the IR range, heat-sensitive inks or pigments, effect pigments, such as liquid crystals, pearlescent pigments. , Bronze and / or multilayer color change pigments influence. These can be used in all possible combinations.
• hot or cold seal coatings can be applied, which may optionally be pigmented.
• the tactile print images can also simultaneously fulfill the function of a spacer to improve the singleness of the printing substrates provided with the tactile print images (for example in the case of packaging lids and the like).
• the printing material thus produced is suitable as a security feature in data carriers, in particular documents of value such as ID cards, banknotes or labels, seals and the like, directly or optionally after appropriate packaging, but also as packaging material, for example in the pharmaceutical, electronics and / or food industry.
• packaging material for example in the pharmaceutical, electronics and / or food industry.
• blister sheets, cartons, covers, film packaging and the like for example, in the form blister sheets, cartons, covers, film packaging and the like.
• the printing substrate may preferably be cut into strips or threads or patches, wherein the width of the strips or threads may preferably be 0.05-20 mm and the patches preferably have average widths or lengths of 0.3-20 mm ,
• the printing substrate is preferably cut into strips, tapes, threads or patches, wherein the width of the threads, strips or tapes is preferably 0.05-50 mm and the patches preferably have average widths and / or lengths of 0.5-200 mm.
• corresponding shapes are punched or cut from the substrate.

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Citations (7)

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• 2004
  • 2004-12-09 DE DE200410059305 patent/DE102004059305A1/de not_active Ceased
• 2005
  • 2005-12-07 EP EP05026693A patent/EP1669205A1/fr not_active Withdrawn

Patent Citations (7)

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