EP1478512B1 - Procede et dispositif d'impression consistant a produire et a structurer une couche hydrophile - Google Patents

Procede et dispositif d'impression consistant a produire et a structurer une couche hydrophile Download PDF

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Publication number
EP1478512B1
EP1478512B1 EP03706501A EP03706501A EP1478512B1 EP 1478512 B1 EP1478512 B1 EP 1478512B1 EP 03706501 A EP03706501 A EP 03706501A EP 03706501 A EP03706501 A EP 03706501A EP 1478512 B1 EP1478512 B1 EP 1478512B1
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EP
European Patent Office
Prior art keywords
layer
ink
regions
hydrophilic
print
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
Application number
EP03706501A
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German (de)
English (en)
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EP1478512A1 (fr
Inventor
Robert Link
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.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
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Publication of EP1478512A1 publication Critical patent/EP1478512A1/fr
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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
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1041—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by modification of the lithographic properties without removal or addition of material, e.g. by the mere generation of a lithographic pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1075—Mechanical aspects of on-press plate preparation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/006—Cleaning, washing, rinsing or reclaiming of printing formes other than intaglio formes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
    • B41C1/1033—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials by laser or spark ablation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
    • B41C2210/08—Developable by water or the fountain solution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/08—Damping; Neutralising or similar differentiation treatments for lithographic printing formes; Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development

Definitions

  • the invention relates to a method and a device for producing a printed image on a carrier material, wherein on the surface of the print carrier ink-attracting and ink-repellent regions are generated according to the structure of the printed image to be printed, wherein the ink-repellent regions are provided with a layer of a ink-repellent medium in that ink is applied to the surface of the print substrate, which adheres to the ink-attracting areas and which is not accepted by the ink-repellent areas, and in which the color distributed on the surface is printed on the substrate.
  • ink-attracting and ink-repellent areas are distributed on the printing plate.
  • the printing plate can be used for a variety of transfer printing operations. For each print image, a new plate must be created with ink-attracting and ink-repellent areas.
  • a method which is called a direct imaging method in which a printing original is created in the printing device on a multilayer, silicone-coated film by selective burning away of the silicone top layer.
  • the silicone-free areas are the ink-attracting areas that accept printing ink during the printing process. Every new print requires a new foil.
  • hydrophobic and hydrophilic areas corresponding to the structure of the print image to be printed are formed on the surface of the print substrate.
  • a thin film of moisture is first applied to the print substrate using applicator rollers or spraying devices, which wets the hydrophilic area of the print substrate.
  • the inking roller transfers ink to the surface of the print substrate, which wets only those areas not covered by the moisture film. After dyeing, the color is finally transferred to the carrier material.
  • a hydrophobic layer is removed by partial burning away and exposing a hydrophilic layer.
  • the hydrophilic layer can be wetted with an ink-repellent fountain solution.
  • the hydrophobic areas are ink accepting and can absorb ink during the printing process.
  • a new printing plate must be used.
  • the wetting of the printing plate with the ink-repelling dampening solution is achieved by targeted roughening and structuring of the plate surface.
  • the resulting increase in surface area and porosity produces microcapillaries and leads to an increase in the effective surface energy and thus to a good wetting or spreading of the dampening solution.
  • wetting-promoting substances are added to the wetting agent during offset printing. These reduce the surface tension of the fountain solution, which also leads to improved wetting of the surface of the print carrier.
  • a CTP (computer-to-press) method is described, wherein on the same surface of the print carrier multiple structuring processes can be performed.
  • the surface of a print substrate is coated with an ink-repellent or ink-receptive layer.
  • ink-attracting regions and ink-repelling regions are produced according to the structure of the printed image to be printed.
  • the ink-attracting areas are then colored with paint.
  • the surface of the print substrate is cleaned and coated again with an ink-repellent or ink-receptive layer.
  • the layer used is a fountain solution layer or an ice layer.
  • the document proposes to manufacture the surface of the printing form from such a material (eg TiO 2 ) whose wetting properties are reversibly changeable between a state with a very small contact angle and a state with a relatively large contact angle.
  • a material eg TiO 2
  • wetting properties are reversibly changeable between a state with a very small contact angle and a state with a relatively large contact angle.
  • EP 0 769 372 A1 relates to a process for lithographic printing.
  • a zirconium ceramic printing plate is exposed with the aid of light, whereby different ink-attracting and ink-repelling areas are formed. With the help of a thermally activated oxidation, the image areas can be deleted again.
  • EP 0 911 155 A1 relates to a printing process in which color-attracting and ink-repelling regions are produced by means of a photoparalytic reaction. By heating the surface of the printing plate, the image areas are deleted and the surface of the printing plate can be restructured with a new image. Again, this document does not disclose the characterizing features of the independent claims of the present invention.
  • a hydrophilic layer in a layer thickness of less than 0.1 ⁇ m is produced on the surface of a print carrier that can be used for printing.
  • the hydrophilic layer Before or after the application of a fountain solution layer, the hydrophilic layer is structured in a patterning process, so that hydrophilic and hydrophobic areas accordingly the structure of the printed image to be printed are generated.
  • a dampening solution film adheres only to the hydrophilic areas and color-attracting and ink-repelling areas arise in accordance with the structuring carried out.
  • the same surface of the print substrate can be restructured and optionally provided with a modified print image.
  • the invention reduces the complexity of structuring.
  • the energy required to structure a hydrophilic layer is reduced compared to the structuring of a fountain solution layer. Accordingly, the hardware required is reduced.
  • color repellent or ink-receptive layer occurs.
  • This layer is adapted to the applied color.
  • the fountain solution layer is color-repellent.
  • this fountain solution layer is color-attracting.
  • oily inks are used, so that a water-containing fountain solution layer is ink repellent.
  • FIG. 1 is a schematic representation of a printing device shown, which is constructed similar to that in the US Patent No. 5,067,404 the same applicant is described.
  • a print carrier 10 in the present case an endless belt, is passed through a pretreatment device 12, which contains a scoop roller 14 and an applicator roller 16.
  • the scoop roller 14 immersed in a liquid contained in a container 13, which contains a wetting-promoting substance.
  • On the surface of the print carrier 10 is applied over the applicator roll 16, this substance containing surfactant, in a molecular layer thickness less than 0.1 microns.
  • the surface of the print carrier 10 is then guided in the direction of arrow P1 to a dampening unit 18, which applies a ink-repelling or ink-attracting dampening solution, for example water, from a dampening solution reservoir 24 to the surface of the print substrate 10 via a scoop roller 20 and an applicator roller 22.
  • dampening solutions other than water can also be used.
  • the order of the fountain solution layer can also be done by other methods, for example by steaming or spraying.
  • the pressure-active surface of the print carrier 10 is completely provided with this fountain solution layer.
  • the fountain solution layer typically has a layer thickness of less than 1 ⁇ m.
  • the generally ink-repellent fountain solution layer is then patterned by an imaging device 26.
  • laser radiation 28 is used for this purpose.
  • ink-attracting regions and ink-repelling regions are formed according to the structure of the printed image to be printed.
  • the structured fountain solution layer passes to an inking unit 30, which by means of the rollers 32, 34, 36 transfers color from a reservoir 38 to the surface of the print carrier 10.
  • the oil-containing color deposits on areas without water-containing dampening solution.
  • the ink can also be transferred to the surface of the print carrier 10 by spraying, knife coating or condensing.
  • a transfer to a carrier material 40 Upon further transport of the print carrier 10, a transfer to a carrier material 40, generally a paper web.
  • the carrier material 40 is passed between two rollers 42, 44.
  • a blanket cylinder (not shown) and further intermediate cylinders can be connected between the roller 42 and the print carrier 10, which effects a color split, as is known per se from the field of offset printing methods.
  • the surface of the print carrier 10 is cleaned in a cleaning station 46.
  • the cleaning station 46 includes a brush 48 and a wiper lip 50, which are brought into contact with the surface of the print carrier 10.
  • the cleaning can be assisted by using ultrasound, high pressure liquid and / or steam.
  • the cleaning can also be done using cleaning fluids and / or solvents.
  • a new application of the wetting-promoting substance for example a surfactant application, and a fountain solution application as well as a renewed structuring can take place.
  • a new print image can be printed.
  • the cleaning device 46, the device 12 and the device 26 are then switched inactive.
  • the still present in color residues print image is then through the inking unit 30 dyed and reprinted. In this mode, therefore, a plurality of identical printed images can be printed.
  • FIG. 2 schematically shows a cross section through the print carrier 10 before and after structuring using the laser beam 28.
  • the wetting is promoted by the application of a wetting-promoting substance on the print carrier surface 10. This happens within the printing cycle before the application of the ink-repellent dampening solution. Due to its physical and chemical properties, the wetting-promoting substance can be applied to the surface as an extremely thin layer of a few molecule layers, preferably smaller than 0.1 .mu.m. This layer is sufficient to favor on its free surface, the wetting with the ink-repellent fountain solution, so that this can also be applied as a very thin layer 54, preferably less than 1 micron.
  • the continuing printing process is not affected by the small amount of wetting-promoting substance, in this case a surfactant layer 52. It can be easily removed by the cleaning process integrated in the printing cycle.
  • the wetting-promoting layer 52 can be dispensed with the otherwise roughened, porous printing plate surface. Instead, a smooth surface of the print carrier 10 is possible to clean with significantly less effort. A fast and stable cleaning process is indispensable for such a digital lithographic printing process or offset printing process and a decisive factor for its effectiveness. Accordingly, the surface of the printing medium 10 has a roughness which is smaller than that Roughness used in the standard offset printing process. Typically, the mean roughness R z is less than 10 microns, preferably less than 5 microns. Expressed as the average roughness value R a , the roughness value lies in the range of less than 2 ⁇ m, preferably less than 1 ⁇ m.
  • a change in the molecular or atomic structure of the material of the print carrier and a permanent and firmly anchored to the surface of the print carrier wetting-promoting layer is not necessary.
  • the additionally applied wetting-promoting substance proposed here for example the surfactant layer 52, develops its wetting-promoting action even at very low levels. Accordingly, its influence on the characteristics of the print substrate 10 is negligible in many respects.
  • the dampening agent layer 54 and the surfactant layer 52 are removed by the laser beam 28 in accordance with the required image structure. These areas are then colored by the inking unit 30 with color. Due to the very smooth surface of the print carrier 10, the cleaning is facilitated, the surfactant layer 52 is completely removed again. Furthermore, the wear of the surface of the print carrier 10 is reduced.
  • FIGS. 3, 4 and 5 show a further embodiment of the invention.
  • FIG. 3 takes place in contrast to the embodiment according to FIG. 1 prior to the application of the ink-repellent or ink-receptive layer on the usable surface of the print substrate, a structuring of a hydrophilic layer with a layer thickness less than 0.1 microns.
  • a steam device 60 is used, which is the Surface of the print carrier 10 subjected to hot steam.
  • the print carrier 10 is provided on its surface with a SiO 2 coating. After the steam treatment, the print carrier 10 is dried by a suction device 62.
  • the hot water vapor generates a hydrophilic molecular structure on the outer surface, eg SiOH.
  • hydrophilic regions and hydrophobic regions arise in accordance with the structure of the printed image to be printed.
  • the downstream dampening unit 18 the entire usable surface of the print carrier 10 is brought into contact with a dampening agent layer, wherein the fountain solution only attaches to the hydrophilic areas, so that ink-attracting areas and ink-repellent areas arise in accordance with the structuring.
  • a paint is applied by the inking unit 30, wherein the oil-containing color attaches to areas without aqueous dampening solution.
  • the transfer printing of the printed image onto the carrier material 40 takes place.
  • the hydrophilic layer is patterned on the surface of the print carrier 10 according to the printed image.
  • the hydrophilic layer is extremely thin and only a few nanometers, typically less than 4 nm. It can therefore be patterned with very little energy expenditure during a printing cycle, whereby the hydrophilic molecular layer disappears.
  • the fountain solution is applied, which produces a moisture film only on the non-hydrophilic areas.
  • Dyeing and transfer printing takes place according to the described known principles of planographic printing or offset printing. After cleaning, in which not only the color residues but also the hydrophilic layer can be removed, but not necessarily removed, the printing cycle can begin again.
  • the hydrophilic layer is regenerated or reapplied, and then the hydrophilic layer is patterned according to the new image data.
  • the hydrophilic layer is formed by activating the surface of the print substrate and by suitably changing the outer molecular surface structure. For example, this can be made possible by the use of chemical activators, reactive gases and / or a suitable energy supply.
  • water vapor as in the example below FIG. 3 can also be formed by the action of hot water and by leaching, such as NaOH, a hydrophilic SiOH structure on the surface.
  • the print carrier is to be provided for this purpose with a SiO2 coating. It is also possible for the print carrier to pass through an activator bath to produce hydrophilization of the surface. It is also possible to order an activator via a nozzle system. Another possibility is to produce the hydrophilic layer by flaming the surface of the print carrier 10. In this case too, wetting-promoting surface structures are produced in a layer thickness of less than 0.1 ⁇ m.
  • An advantageous arrangement is the combination of hydrophilization with cleaning.
  • both the cleaning and the hydrophilizing effect of a hot water jet or a hot steam jet can be used.
  • Purification and production of hydrophilic Layer are then performed in a single process step.
  • a wetting-promoting substance is applied to the surface of the print carrier to produce the hydrophilic layer.
  • pretreatment device 12 can be used.
  • a liquid can be applied from the container 13, which contains a wetting-promoting substance, for example a surfactant, in a layer thickness less than 0.1 microns are applied.
  • a wetting-promoting substance are also alcohols into consideration.
  • the job can alternatively be done by doctoring, spraying and vapor deposition.
  • the partial removal of this hydrophilic layer can be done by local thermal energy supply. Due to the small layer thickness, the energy consumption can be low.
  • LEDs, LED combs or heating elements can be used.
  • FIGS. 3 and 4 can be done per circulation of the print carrier 10, a re-structuring, whereby each circulation a new print image is printed.
  • the devices for the restructuring are then switched inactive.
  • FIG. 5 shows a cross section through the print carrier 10 before and after patterning by the laser beam 28 for the example FIG. 4 ,
  • the surface of the print carrier 10 is very smooth, as is the case with the previous examples.
  • the thin surfactant layer 52 is patterned by the laser beam 28, ie, hydrophilic regions 68 and hydrophobic regions 64 are produced.
  • the dampening unit 18 a thin water-containing wet film is applied only to the hydrophilic areas.
  • the regions 64 are then colored by the inking unit 30 with an oily color which is repelled by the fountain solution 54 in the region of the hydrophilic regions 68.
  • FIG. 6 shows a further embodiment. In offset printing and especially in the digital method, for example after the US Patent No.
  • the constant and well-defined thickness of the dampening solution layer on the surface of the print carrier plays a crucial role for the stability and efficiency of the printing process.
  • a printing device is described which allows and monitors a defined, controllable and controllable very thin application of dampening solution.
  • the standardized offset printing process usually uses a dampening system consisting of a number of rotating rollers for the application of the dampening solution. Together with a roughened or porous well-water pressure plate results in a sufficiently stable for standard offset printing water film.
  • the amount of dampening solution and the thickness of the fountain solution layer can be adjusted for example by the delivery of certain rollers to each other or the speed of the scoop roller.
  • the storage effect of the dampening unit and also the pressure plate leads to a strong delaying response to adjustment measures.
  • the roughened, strongly water-storing printing plates are essential.
  • the humidity on the printing plate to produce a very thin film of water.
  • the thickness of the water film is highly dependent on the ambient conditions, such as humidity and temperature, and is to be kept constant over a long period of time.
  • FIG. 6 a structure is used which is similar to that in the aforementioned DE-A-101 32 204 described structure which realizes a CTP (Computer-To-Press) method.
  • CTP Computer-To-Press
  • printing device allows to produce 10 different printed images on the same surface of the cylindrical print carrier.
  • the printing device includes the inking unit 30, with a plurality of rollers, is transferred by the oily ink from the reservoir 38 to the surface of the print carrier 10.
  • the inked surface of the print carrier 10 transmits the ink to a blanket cylinder 90. From there, the ink reaches the paper web 40, which is pressed by the impression cylinder 42 against the blanket cylinder 90.
  • the dampening unit 18 transfers dampening solution, eg water, from the dampening solution reservoir 24 onto the surface of the print carrier 10 via three rollers.
  • the surface of the print carrier 10 can be coated using wetting agents and / or surfactants or by corona and / or Plasma treatment are brought into a more hydrophilic state, as has already been described above.
  • the dampening solution layer is selectively removed by supplying energy by means of a laser beam 28 and there is the desired image structure.
  • the inking by the inking unit 30 then takes place at the ink-attracting areas of the structuring. After patterning, the color may be solidified using a fuser 92.
  • a large number of printing processes take place before the surface is restructured.
  • the print image located on the print carrier 10 is inked and reprinted once per print, ie there is a multiple inking of the printed image.
  • a second mode a new print image is applied to the surface of the print carrier.
  • This cleaning station can be pivoted to the print carrier 10 according to the arrow P2 and swung away from it again. Further details of the structure of the printing device after FIG. 6 are in the mentioned DE-A-101 32 204 described.
  • an energy source 94 which emits heat energy to the dampening solution film on the surface of the print carrier 10. This energy reduces the thickness of the fountain solution layer.
  • the energy source is followed by a layer thickness measuring device 96.
  • This layer thickness measuring device 96 determines the actual thickness of the dampening solution film and outputs an electrical signal corresponding to the thickness to a controller 98.
  • the controller 98 compares the measured actual thickness with a predetermined target thickness. With a desired-actual value deviation, the energy source 94 is driven so that the thickness of the fountain solution layer is reduced to the desired target thickness.
  • the layer thickness measuring device 96 can operate without contact, for example, according to the triangulation method, the transmission method or the capacitive method.
  • energy source 94 comes one or more IR lamps, radiant heaters, Laser systems, laser diodes or heating elements into consideration.
  • the interaction of the energy source 94, the Schichtdikkenmeß réelles 96 and the controller 98 may be such that only a monitoring function is performed. If the layer thickness exceeds or falls below a predetermined desired value, then a corresponding warning signal is emitted and then the energy supply for the energy source 94 is readjusted. However, the energy source 94, the Schichtdickenmeß réelle 96 and the controller 98 can also be combined to form a control loop in which the energy source 94 is driven so that at a control deviation between the actual value and target value of the layer thickness minimizes this deviation and preferably to zero is regulated.
  • the power source 94 may be driven by the controller using analog voltage regulation or digitally by pulse modulation, as indicated by the signal sequence 100.
  • a thick-constant dampening solution film is produced, which is reduced in its layer thickness defined in a subsequent second step.
  • the result is a uniform fountain solution layer with a defined and very small thickness.
  • the subsequent structuring can thus be carried out with minimal energy and with consistent results. Overall, the print quality is thus increased.
  • the advantages of the printing device shown are that a direct reaction to a change in the layer thickness of the dampening solution layer can take place, that a known and defined thickness of the fountain solution layer can be adjusted and that extremely thin fountain solution layers can be produced. Furthermore, can the required structuring energy is minimized, in particular for digital printing processes.
  • both an endless belt and a cylinder can be used as the print carrier.
  • the transfer to the substrate can be done directly or with the interposition of a blanket cylinder or other intermediate cylinders for a color separation.
  • the layer thickness control according to the example according to FIG. 6 can also be used for the other examples.
  • a fixation of the applied color by means of a fixing device.
  • the cleaning station 46, the dampening unit 18 and the image forming device can be switched inactive and active, for example by pivoting.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Printing Methods (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Claims (9)

  1. Procédé pour générer une image d'impression sur un matériau de support (40), dans lequel
    - une couche hydrophile (52) est déposée sur la surface, utilisable pour l'impression, d'un support d'impression (10) avec une épaisseur de couche inférieure à 0,1 µm,
    - une couche d'agent humidifiant (54) est déposée sur la surface du support d'impression (10), un film d'agent humidifiant (54) ne se formant que dans les régions hydrophiles (68),
    - dans une opération de structuration, la couche hydrophile (52) est structurée avant de déposer la couche d'agent humidifiant (54) ou la couche hydrophile (52) est structurée, conjointement avec la couche d'agent humidifiant (54), après avoir déposé la couche d'agent humidifiant (54), de manière à générer des régions hydrophiles (68) et des régions hydrophobes (64) en fonction de la structure de l'image d'impression à imprimer de sorte que l'on obtient des régions chromophiles et des régions chromophobes en fonction de la structuration effectuée,
    - sur la surface de la couche d'agent humidifiant est déposée une couleur qui adhère aux régions chromophiles (64) et qui n'est pas acceptée par les régions chromophobes (68),
    - la couleur déposée est ensuite transférée sur le matériau de support (40),
    - avant d'effectuer une nouvelle opération de structuration, on nettoie la surface du support d'impression (10) et on dépose de nouveau une couche hydrophile (52), une couche d'agent tensioactif (57) étant déposée comme couche hydrophile sur la surface du support d'impression (10).
  2. Procédé selon la revendication 1, dans lequel la couche hydrophile (52) est déposée au moyen de rouleaux ou par pulvérisation.
  3. Procédé selon l'une des revendications précédentes, dans lequel la couche hydrophile est nettoyée et générée en une seule étape opératoire.
  4. Procédé selon la revendication 3, dans lequel on utilise de l'eau chaude et/ou de la vapeur d'eau pour effectuer le nettoyage.
  5. Procédé selon l'une des revendications précédentes, dans lequel l'on utilise un rayonnement pour effectuer la structuration.
  6. Procédé selon la revendication 5, dans lequel l'on utilise le rayonnement d'un système laser, d'un laser, de diodes laser, de LED ou d'un réseau de diodes laser.
  7. Dispositif pour générer une image d'impression sur un matériau de support (40), dans lequel il est prévu des moyens permettant
    - de déposer une couche hydrophile (52) d'une épaisseur inférieure à 0, 1 µm sur une surface, utilisable pour l'impression, d'un support d'impression (10)
    - de déposer une couche d'agent humidifiant (54) sur la surface de la couche hydrophile (52),
    - de structurer la couche hydrophile (52) ou la couche hydrophile (52) et la couche d'agent humidifiant (54) dans une opération de structuration afin de générer des régions hydrophiles (68) et des régions hydrophobes (64) en fonction de la structure de l'image d'impression à imprimer de sorte que l'on obtient des régions chromophiles et des régions chromophobes en fonction de la structuration effectuée,
    - de déposer sur la surface du film d'agent humidifiant (54) une couleur qui adhère aux régions chromophiles (64) et qui n'est pas acceptée par les régions chromophobes (68),
    - de transférer ensuite la couleur déposée sur le matériau de support (40) et,
    - avant d'effectuer une nouvelle opération de structuration, de nettoyer la surface du support d'impression (10) et de déposer à nouveau une couche hydrophile (52), la couche hydrophile étant une couche d'agent tensioactif (52).
  8. Dispositif selon la revendication 7, dans lequel la surface du support d'impression (10) est une surface d'enveloppe de cylindre ou une bande sans fin.
  9. Dispositif selon la revendication 7, dans lequel la couche d'agent tensioactif (52) a une épaisseur inférieure à 100 nm.
EP03706501A 2002-02-19 2003-02-13 Procede et dispositif d'impression consistant a produire et a structurer une couche hydrophile Expired - Lifetime EP1478512B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10206938A DE10206938A1 (de) 2002-02-19 2002-02-19 Verfahren und Einrichtung zum Drucken, wobei eine hydrophile Schicht erzeugt und diese strukturiert wird
DE10206938 2002-02-19
PCT/EP2003/001451 WO2003070461A1 (fr) 2002-02-19 2003-02-13 Procede et dispositif d'impression consistant a produire et a structurer une couche hydrophile

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EP1478512A1 EP1478512A1 (fr) 2004-11-24
EP1478512B1 true EP1478512B1 (fr) 2011-08-03

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EP03706501A Expired - Lifetime EP1478512B1 (fr) 2002-02-19 2003-02-13 Procede et dispositif d'impression consistant a produire et a structurer une couche hydrophile

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US (2) US20050115429A1 (fr)
EP (1) EP1478512B1 (fr)
JP (1) JP2005527395A (fr)
AT (1) ATE518651T1 (fr)
DE (1) DE10206938A1 (fr)
WO (1) WO2003070461A1 (fr)

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Publication number Publication date
JP2005527395A (ja) 2005-09-15
ATE518651T1 (de) 2011-08-15
EP1478512A1 (fr) 2004-11-24
US20050115429A1 (en) 2005-06-02
US20070062389A1 (en) 2007-03-22
DE10206938A1 (de) 2003-09-04
WO2003070461A1 (fr) 2003-08-28

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