EP4338969B1 - Druckverfahren mit einem flüssigkeitströpfchengenerator - Google Patents

Druckverfahren mit einem flüssigkeitströpfchengenerator Download PDF

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Publication number
EP4338969B1
EP4338969B1 EP22195947.1A EP22195947A EP4338969B1 EP 4338969 B1 EP4338969 B1 EP 4338969B1 EP 22195947 A EP22195947 A EP 22195947A EP 4338969 B1 EP4338969 B1 EP 4338969B1
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EP
European Patent Office
Prior art keywords
liquid
inlet
nozzles
zone
printing
Prior art date
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Active
Application number
EP22195947.1A
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English (en)
French (fr)
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EP4338969A1 (de
Inventor
Wout Verbeek
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Agfa NV
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Agfa NV
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Filing date
Publication date
Application filed by Agfa NV filed Critical Agfa NV
Priority to EP22195947.1A priority Critical patent/EP4338969B1/de
Priority to KR1020257008596A priority patent/KR20250051723A/ko
Priority to PCT/EP2023/068300 priority patent/WO2024056230A1/en
Priority to CN202380066255.5A priority patent/CN119894682A/zh
Priority to JP2025515750A priority patent/JP2025529474A/ja
Publication of EP4338969A1 publication Critical patent/EP4338969A1/de
Application granted granted Critical
Publication of EP4338969B1 publication Critical patent/EP4338969B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/1707—Conditioning of the inside of ink supply circuits, e.g. flushing during start-up or shut-down
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/195—Ink jet characterised by ink handling for monitoring ink quality
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2107—Ink jet for multi-colour printing characterised by the ink properties
    • B41J2/2114—Ejecting specialized liquids, e.g. transparent or processing liquids
    • B41J2/2117—Ejecting white liquids

Definitions

  • the present invention relates to image formation by a liquid droplet generator wherein image quality issues due to liquid-sedimentation in the manifold of the liquid droplet generator are avoided.
  • Image formation is a procedure whereby a digital image is printed on a medium e.g. by jetting droplets of liquid or another type of print fluid onto said medium, such as paper, plastic, a substrate for 3D printing.
  • Said image formation is commonly employed in apparatuses, such as printers (e.g. inkjet printer) but also facsimile machines, copying machines, plotting machines, multifunction peripherals, etc.
  • the core of a typical jetting apparatus or image forming apparatus is one or more liquid droplet generators (also known as "printheads") having nozzles that discharge liquid droplets, a mechanism for moving the liquid droplet generator and/or the medium in relation to one another, and a controller that controls how liquid is discharged from the individual nozzles of the liquid droplet generator onto the medium in the form of pixels.
  • a typical liquid droplet generator includes a plurality of nozzles aligned in one or more rows (called “nozzlerows”) along a discharge surface of the liquid droplet generator.
  • Each nozzle is part of a “jetting channel", which includes the nozzle, a pressure chamber, and an actuator, such as a piezoelectric actuator.
  • a liquid droplet generator also includes a drive circuit that controls when each individual jetting channel fires based on image data. To jet from a jetting channel, the drive circuit provides a jetting pulse to the actuator, which causes the actuator to deform a wall of the pressure chamber. The deformation of the pressure chamber creates pressure waves within the pressure chamber that eject a droplet of print fluid (e.g., liquid) out of the nozzle.
  • print fluid e.g., liquid
  • Drop on Demand (DoD) printing is moving towards higher productivity and quality, which requires small droplet sizes ejected at high jetting frequencies.
  • the print quality delivered by a liquid droplet generator depends on ejection or jetting characteristics, such as droplet velocity, droplet mass (or volume/diameter), jetting direction, etc.
  • ejection or jetting characteristics such as droplet velocity, droplet mass (or volume/diameter), jetting direction, etc.
  • liquid-sedimentation inside the liquid droplet generator especially in the manifold, negatively affects the jetting characteristics and thus the image quality especially when said liquid droplet generator has a manifold with two inlets at both sides of said manifold.
  • the liquid-sedimentation in the manifold occurs e.g. when said liquid droplet generator, filled with liquid, is not used for a long period.
  • Document US 2017/253025 A1 discloses a droplet ejection control apparatus that has a droplet ejection amount control unit configured to change droplet ejection amounts for each raster in a region where the overlap printing is performed so that a total sum of the droplet ejection amounts for each raster in the region where the overlap printing is performed sequentially changes to be equal to or greater than a reference amount that is defined by a total sum of droplet ejection amounts in a normal region and to be equal to or smaller than the above reference amount.
  • EP 2157163 A discloses a maintenance liquid for inkjet printers comprising at least one of glycol ethers and glycol esters and 45 to 10 mg/L of dissolved oxygen.
  • EP 1621348 A discloses a washing solution for washing a cationically UV curable inkjet ink inkjet printer head, which contains not less than 50 parts by weight of a polymerizable compound selected from the at least two kinds of polymerizable compounds included in the ink and having the lowest viscosity among the at least two kinds of polymerizable compounds, or not less than 50 parts by weight of a polymerizable compound having a viscosity of 30 mPa ⁇ s or less at ordinary temperature.
  • FIG. 2 is a cross-sectional view of liquid droplet generator (100) in an illustrative embodiment as illustrated in FIG.1 .
  • the manifold 314 is formed by elongated body (316) of main body (302) that extends (left to right in FIG. 2 ) between ends (317,318).
  • the manifold (314) is also formed by a first inlet (516) and second inlet (517) (517) that fluidly couple supply ports (330) to said opposing ends (317, 318) of elongated body (316).
  • print fluid is supplied to the elongated body (316) at opposing ends (317, 318) in this embodiment.
  • the elongated body (316) is a conduit for the print fluid to flow.
  • the bottom portion of elongated body (316) and thus manifold is open to the jetting channels connected to nozzles in a nozzle row (304).
  • elongated body (316) is the portion of (supply) manifold (314) that delivers the print fluid to the jetting channels.
  • FIG. 3 illustrates as embodiment a nozzle row (304) of a liquid droplet generator (100) with 15 nozzles (illustrated as circles).
  • the selection of nozzles for jetting are determined by a (repeatable) printmask (1000) for two-pass printing wherein said printmask (1000) has a width of 7 and height of 15 and the nozzle row is divided in three sequential zones (1001, 1002, 1003). "1" in said printmask (1000) is used for the first pass; "2" in said printmask (1000) is used for the second pass. It is clear that in the first pass nozzles in the first zone (1001) shall be used more than the nozzles in the second zone (1002) and even more than the nozzles in the third zone (1003).
  • the liquid droplet generator (100) in the present embodiment and preferred embodiments has one or more rows of nozzles for jetting droplets of liquid, also called drop-on-demand printheads. Preferably said drop ejection is performed by using piezoelectric effects.
  • Such printheads are nowadays dominating in home and office inkjet print systems but also in industrial applications for either printing or digital fabrication.
  • actuation mechanisms are possible such as push-mode actuators or squeeze-mode actuators.
  • the liquid droplet generator (100) in the present embodiment has an essential manifold elongated in parallel to a nozzle row; and configured to provide a liquid path for the liquid to the plurality of nozzles.
  • the liquid is provided by a first inlet (516) and a second inlet (517) which are connected with said manifold each at both side of said manifold.
  • no outlet is provided as known in reflow liquid droplet generators.
  • the speed flow of the liquid at both inlets determines the liquid flow in said manifold.
  • the speed flow in the first inlet (516) and second inlet (517) are the same.
  • the liquid droplet generator (100) may have a master liquid inlet which is split in said first inlet (516) and said second inlet (517). The liquid supply is then connected to said master liquid inlet where from the liquid is further provided in said liquid droplet generator (100) via said first and second inlet (516, 517).
  • the liquid-sedimentation in the manifold can be displaced whereby the liquid droplet generator (100) can directly be used for printing without the necessary maintenance so an operator can directly start the production of printed articles.
  • the droplet generator is part of a multi-pass inkjet printer wherein the halftone image is printed in multiple passes and the part is jetted in a single pass.
  • the printmask (1000) defines then the jetting of nozzles in each pass.
  • the determined part of the halftone image is additional printed by another plurality of nozzles, arranged in one or more rows, of the liquid droplet generator (100), where the liquid droplet generator (100) has at a third location in another manifold a liquid-sedimentation with highest density and wherein the other manifold is
  • the liquid droplet generator (100) is preferably part of a printing system, such as an inkjet printer.
  • the printing system is preferably for printing on flat ink receiving media but may also be a three-dimensional printing system.
  • an image is formed by one or more of said liquid droplet generators which are capable of printing one ink or more inks.
  • the printing system is preferably configured to move the liquid droplet generator (100) for printing parts of an image, such as multi-pass inkjet printing system.
  • a multi-pass inkjet printing method is used in the Jeti Tauro TM manufactured by AGFA NV with a maximum printable width of 254 cm and which can accommodate for example rigid media up to 400 cm in length.
  • the printmask (1000) in the present embodiment has a width and height, so called two-dimensional printmask (1000).
  • the width and height are larger than 1.
  • the printmask (1000) represents a blue noise halftoned gradient from nearest nozzle of the plurality of nozzles at the first inlet (516) to nearest nozzle of the plurality of nozzles at the second inlet (517); respectively from dark to light.
  • the printmask (1000) divides for another selected printing period following the selected printing period the plurality of nozzles in other sequential zones between the first inlet (516) and second inlet (517) comprising minimal for printing the determined part:
  • the part is determined by using a printmask (1000) which divides for a determined printing period the plurality of nozzles in sequential zones between said first and second inlet (516, 517) comprising minimal
  • the liquid is preferably an ink but it may also be a varnish, primer, a coating, a cleaning liquid, a top-protection coating, pre-treatment liquid, post-treatment liquid.
  • Liquid sedimentation results in clogging of the liquid droplet generator (100) and poor storage stability of the liquid. They are mainly some particles of the liquid having a specific gravity between said particles and the liquid medium.
  • the liquid is preferably pigmented inkjet inks as the use of colour pigments provide higher light stability to the decorative laminate panels than dyes. It may be a pigmented aqueous inkjet ink or an UV curable inkjet ink. Said pigments are mainly found in said liquid sedimentation.
  • An aqueous inkjet ink preferably includes at least a colour pigment and water, more preferably completed with one or more organic solvents such as humectants, and a dispersant if the colour pigment is not a self-dispersible colour pigment.
  • An UV curable inkjet ink preferably includes at least a colour pigment, a polymeric dispersant, a photoinitiator and a polymerizable compound, such as a monomer or oligomer.
  • the jetting viscosity of the liquid is between 2 mPa ⁇ s and 50 mPa ⁇ s and the jetting temperature of the liquid is between 20°C and 85° C degrees.
  • the jetting viscosity is measured by measuring the viscosity of the liquid at the jetting temperature.
  • the jetting viscosity may be measured with various types of viscometers such as a Brookfield DV-II+ viscometer at jetting temperature and at 12 rotations per minute (RPM) using a CPE 40 spindle which corresponds to a shear rate of 90 s -1 or with the HAAKE Rotovisco 1 Rheometer with sensor C60/1 Ti at a shear rate of 1000 s -1 .
  • the jetting viscosity is from 10 mPa ⁇ s to 200 mPa ⁇ s more preferably from 25 mPa ⁇ s to 100 mPa ⁇ s and most preferably from 30 mPa ⁇ s to 70 mPa ⁇ s.
  • the jetting temperature may be measured with various types of thermometers.
  • the jetting temperature of jetted liquid is measured at the exit of a nozzle in the liquid droplet generator (100) while jetting or it may be measured by measuring the temperature of the liquid in the liquid channels or nozzle while jetting through the nozzle.
  • the jetting temperature is from 10° C to 100° C more preferably from 20° C to 60° C and most preferably from 30° C to 50° C.
  • the liquid has preferably a pigment an average particle size larger than 100 nm more preferably 200 nm or has a pigment in an amount of more than 16 wt% based on the total weight of the liquid.
  • a pigment is preferably an inorganic pigment and most preferably a white pigment as colorant.
  • the determination of the numeric average particle diameter is best performed by photon correlation spectroscopy at a wavelength of 633 nm with a 4mW HeNe laser on a diluted sample of the pigmented inkjet ink.
  • a suitable particle size analyzer used was a Malvern TM nano-S available from Goffin-Meyvis.
  • a sample can, for example, be prepared by addition of one drop of ink to a cuvette containing 1.5 mL ethyl acetate and mixed until a homogenous sample was obtained.
  • the measured particle size is the average value of 3 consecutive measurements consisting of 6 runs of 20 seconds.
  • a white pigment preferably has a numeric average pigment particle size larger than 180 nm in order to have a strong opacifying capability.
  • Suitable white pigments are given by Table 2 in [0116] of WO 2008/074548 (AGFA GRAPHICS) .
  • the white pigment is preferably a pigment with a refractive index greater than 1.60.
  • the white pigments may be employed singly or in combination.
  • titanium dioxide is used as pigment with a refractive index greater than 1.60.
  • Suitable titanium dioxide pigments are those disclosed in [0117] and in [0118] of WO 2008/074548 (AGFA GRAPHICS) .
  • the liquid is an UV curable based pigmented inkjet ink
  • the liquid has to be cured by ultraviolet radiation.
  • An UV curing device may be arranged in combination with the liquid droplet generator (100), travelling therewith so that the UV curable inkjet ink is exposed to curing radiation very shortly after been jetted. This method of curing is called 'UV-pinning' and helps to provide a high image quality, such as high sharpness. UV-pinning is often followed by a final UV curing step, when the UV dose in UV-pinning is insufficient to obtain full cure.
  • any ultraviolet light source as long as part of the emitted light can be absorbed by the photo-initiator or photo-initiator system, may be employed as a radiation source, such as, a high or low pressure mercury lamp, a cold cathode tube, a black light, an ultraviolet LED, an ultraviolet laser, and a flash light.
  • the preferred source is one exhibiting a relatively long wavelength UV-contribution having a dominant wavelength of 300-400 nm.
  • a UV-A light source is preferred due to the reduced light scattering therewith resulting in more efficient interior curing.
  • the UV curing and especially UV-pinning is preferably performed using UV LEDs.
  • the UV curing is performed using UV LEDs having an emission wavelength higher than 370 nm.
  • UV LEDs have a long life-time and an almost constant UV dose until the end of life, contrary to e.g. mercury bulbs.
  • the inkjet printer may include one or more oxygen depletion units.
  • the oxygen depletion units place a blanket of nitrogen or other relatively inert gas (e.g. CO 2 ), with adjustable position and adjustable inert gas concentration, in order to reduce the oxygen concentration in the curing environment. Residual oxygen levels may be maintained as low as 200 ppm, but are generally in the range of 200 ppm to 1200 ppm.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Claims (10)

  1. Ein Verfahren zum Drucken eines Rasterbildes, wobei ein bestimmter Teil des Rasterbildes mittels einer Vielzahl von in einer oder mehreren Reihen angeordneten Düsen eines Flüssigkeitströpfchengenerators (100) gedruckt wird,
    wobei der Flüssigkeitströpfchengenerator (100) an einer ersten Stelle in einem Verteiler des Flüssigkeitströpfchengenerators (100) eine Flüssigkeitssedimentation mit höchster Dichte aufweist und wobei der Verteiler
    - einen ersten Einlass (516) und einen zweiten Einlass (517), durch die der Verteiler mit einer Flüssigkeit befüllt wird, aufweist,
    - sich länglich parallel zur Vielzahl von Düsen zwischen dem ersten Einlass (516) und dem zweiten Einlass (517) erstreckt, und
    - so konfiguriert ist, dass er eine Flüssigkeitsstrecke für die Flüssigkeit zur Vielzahl von Düsen ausbildet,
    wobei der Teil so bestimmt wird, dass mittels einer Druckmaske (1000) mit einer Breite und Höhe, die für einen ausgewählten Druckzeitraum die Vielzahl von Düsen in mindestens drei sequentielle Bereiche zwischen dem ersten Einlass (516) und dem zweiten Einlass (517) aufteilt, die Flüssigkeitssedimentation zu einer zweiten Stelle im Verteiler verschoben wird, wobei zum Drucken des bestimmten Teils mindestens folgende Bereiche vorgesehen sind:
    - ein erster Bereich (1001) am ersten Einlass (516), wobei die Druckmaske (1000) bestimmt, dass die Düsen des ersten Bereichs (1001) zum Drucken von N1% des Teils verwendet werden, und
    - ein zweiter Bereich (1002) in der Mitte zwischen dem ersten Einlass (516) und dem zweiten Einlass (517), wobei die Druckmaske (1000) bestimmt, dass die Düsen des zweiten Bereichs (1002) zum Drucken von N2% des Teils verwendet werden, und
    - ein dritter Bereich (1003) am zweiten Einlass (517), wobei die Druckmaske (1000) bestimmt, dass die Düsen des dritten Bereichs (1003) zum Drucken von N3% des Teils verwendet werden,
    wobei 100 >= N1 > N2 > N3 >= 0.
  2. Das Verfahren nach Anspruch 1, wobei die Druckmaske (1000) einen mit blauem Rauschen gerasterten Gradienten von der nächstgelegenen Düse der Vielzahl von Düsen am ersten Einlass (516) zur nächstgelegenen Düse der Vielzahl von Düsen am zweiten Einlass (517), bzw. von dunkel zu hell, darstellt.
  3. Das Verfahren nach den vorstehenden Ansprüchen, wobei die Druckmaske (1000) für einen weiteren ausgewählten, an den ausgewählten Druckzeitraum anschließenden Druckzeitraum die Vielzahl von Düsen in sequentielle Bereiche zwischen dem ersten Einlass (516) und dem zweiten Einlass (517) aufteilt, wobei zum Drucken des bestimmten Teils mindestens folgende Bereiche vorgesehen sind:
    - ein vierter Bereich am ersten Einlass (516), wobei die Druckmaske (1000) bestimmt, dass zum Drucken von N4% des Teils die Düsen im vierten Bereich zum Drucken des Teils verwendet werden, und
    - ein fünfter Bereich in der Mitte zwischen dem ersten Einlass (516) und dem zweiten Einlass (517), wobei die Druckmaske (1000) bestimmt, dass zum Drucken von N5% des Teils die Düsen im fünften Bereich zum Drucken des Teils verwendet werden, und
    - ein sechster Bereich am zweiten Einlass (517), wobei die Druckmaske (1000) bestimmt, dass zum Drucken von N6% des Teils die Düsen im sechsten Bereich zum Drucken des Teils verwendet werden,
    wobei 0 >= N4 > N5 > N6 >= 100.
  4. Das Verfahren nach einem der vorstehenden Ansprüche, wobei der Tröpfchengenerator Teil eines Multi-Pass-Tintenstrahldruckers ist, wobei das Rasterbild in mehrfachen Durchgängen gedruckt wird und der Teil in einem einzelnen Durchgang aufgesprüht wird.
  5. Das Verfahren nach einem der vorstehenden Ansprüche, wobei der erste Einlass (516) und der zweite Einlass (517) den Verteiler bei derselben Strömungsgeschwindigkeit befüllen.
  6. Das Verfahren nach einem der vorstehenden Ansprüche, wobei der bestimmte Teil des Rasterbildes zusätzlich durch eine weitere Vielzahl von in einer oder mehreren Reihen angeordneten Düsen des Flüssigkeitströpfchengenerators (100) gedruckt wird,
    wobei der Flüssigkeitströpfchengenerator (100) an einer dritte Stelle in einem weiteren Verteiler eine Flüssigkeitssedimentation mit höchster Dichte aufweist und wobei der weitere Verteiler
    - einen dritten Einlass und einen vierten Einlass, durch die der weitere Verteiler mit der Flüssigkeit befüllt wird, aufweist, und
    - sich länglich parallel zur weiteren Vielzahl von Düsen zwischen dem dritten Einlass und dem vierten Einlass erstreckt, und
    - so konfiguriert ist, dass er eine weitere Flüssigkeitsstrecke für die Flüssigkeit zur weiteren Vielzahl von Düsen ausbildet,
    und wobei eine komplementäre Druckmaske (1000) der Druckmaske (1000) zusätzlich zur Bestimmung des Teils verwendet wird, um die Flüssigkeitssedimentation der Flüssigkeit im weiteren Verteiler zu einer vierten Stelle zu verschieben.
  7. Das Verfahren nach einem der vorstehenden Ansprüche, wobei die Aufsprühviskosität der Flüssigkeit zwischen 2 mPa.s und 50 mPa.s liegt und die Aufsprühtemperatur der Flüssigkeit zwischen 20°C und 85°C liegt.
  8. Das Verfahren nach Anspruch 7, wobei die Flüssigkeit ein Pigment mit einer mittleren Partikelgröße von mehr als 150 nm enthält oder ein Pigment in einer Menge von mehr als 16 Gew.-%, bezogen auf das Gesamtgewicht der Flüssigkeit, enthält.
  9. Das Verfahren nach Anspruch 8, wobei das Pigment ein anorganisches Pigment ist.
  10. Das Verfahren nach Anspruch 9, wobei das anorganische Pigment ein weißes Pigment als Farbmittel ist.
EP22195947.1A 2022-09-15 2022-09-15 Druckverfahren mit einem flüssigkeitströpfchengenerator Active EP4338969B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP22195947.1A EP4338969B1 (de) 2022-09-15 2022-09-15 Druckverfahren mit einem flüssigkeitströpfchengenerator
KR1020257008596A KR20250051723A (ko) 2022-09-15 2023-07-04 액적 발생기를 이용한 인쇄 방법
PCT/EP2023/068300 WO2024056230A1 (en) 2022-09-15 2023-07-04 A printing method with a liquid droplet generator
CN202380066255.5A CN119894682A (zh) 2022-09-15 2023-07-04 利用液体液滴发生器的打印方法
JP2025515750A JP2025529474A (ja) 2022-09-15 2023-07-04 液滴発生装置を用いる印刷方法

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Application Number Priority Date Filing Date Title
EP22195947.1A EP4338969B1 (de) 2022-09-15 2022-09-15 Druckverfahren mit einem flüssigkeitströpfchengenerator

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EP4338969A1 EP4338969A1 (de) 2024-03-20
EP4338969B1 true EP4338969B1 (de) 2025-04-09

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JP (1) JP2025529474A (de)
KR (1) KR20250051723A (de)
CN (1) CN119894682A (de)
WO (1) WO2024056230A1 (de)

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