EP3867076B1 - Verfahren zum bedrucken einer oberfläche eines nichtsaugenden substrates mit einer von einer tintenstrahldruckeinrichtung aufzubringenden tinte - Google Patents

Verfahren zum bedrucken einer oberfläche eines nichtsaugenden substrates mit einer von einer tintenstrahldruckeinrichtung aufzubringenden tinte Download PDF

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Publication number
EP3867076B1
EP3867076B1 EP19761852.3A EP19761852A EP3867076B1 EP 3867076 B1 EP3867076 B1 EP 3867076B1 EP 19761852 A EP19761852 A EP 19761852A EP 3867076 B1 EP3867076 B1 EP 3867076B1
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EP
European Patent Office
Prior art keywords
substrate
ink
nozzle unit
blowing nozzle
inkjet printing
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.)
Active
Application number
EP19761852.3A
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German (de)
English (en)
French (fr)
Other versions
EP3867076A1 (de
Inventor
Eberhard Wahl
Manuel KOMANDER
Bernhard Mokler
Rainer Simon
Dominik WEWIOR
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.)
Koenig and Bauer AG
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Koenig and Bauer AG
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Publication date
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Publication of EP3867076A1 publication Critical patent/EP3867076A1/de
Application granted granted Critical
Publication of EP3867076B1 publication Critical patent/EP3867076B1/de
Active legal-status Critical Current
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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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00216—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using infrared [IR] radiation or microwaves
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0022—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using convection means, e.g. by using a fan for blowing or sucking air
    • B41J11/00222—Controlling the convection means
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • B41J11/06—Flat page-size platens or smaller flat platens having a greater size than line-size platens
    • 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
    • B41J2/205—Ink jet for printing a discrete number of tones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0058—Digital printing on surfaces other than ordinary paper on metals and oxidised metal surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0064—Digital printing on surfaces other than ordinary paper on plastics, horn, rubber, or other organic polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0076—Digital printing on surfaces other than ordinary paper on wooden surfaces, leather, linoleum, skin, or flowers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0082—Digital printing on bodies of particular shapes
    • B41M5/0088—Digital printing on bodies of particular shapes by ink-jet printing

Definitions

  • the invention relates to a method for printing a surface of a non-absorbent substrate with an ink to be applied by an inkjet printer according to claim 1.
  • An ink jet recording method in which an image is recorded on a polyolefin-containing target recording surface by ejecting an ink composition containing water, a colorant and resin from nozzles of an ink jet recording head.
  • a method for applying an oil-based ink to a substrate having a resin layer, wherein the substrate is pre-treated to improve wetting properties before application of the oil-based ink and post-treated after application of the oil-based ink.
  • an image recording method in which a recording substrate is subjected to a surface treatment by exposing an image recording surface of the recording substrate to light from an excimer emission using a xenon gas, the recording substrate being a substrate made of non-absorbing or weakly absorbing fibrous materials, and in which a ink composition is applied by an ink jet method onto the image recording surface of the recording substrate after the surface treatment.
  • an ink jet recording method which comprises applying a treatment liquid in which there is a content of a nitrogenous solvent, which content is larger than that in an ink composition, wherein there is little or no absorptivity to the recording medium, wherein surface asperities are equal to or larger than 10 ⁇ m, wherein the ink composition containing a nitrogen-containing solvent is carried out by ejecting the ink composition onto the recording medium from an ink jet head, the processing liquid having been previously applied onto the recording medium.
  • a printing device for printing flat structures in the form of tin plates with at least one printing ink, the surface tension of this flat structure being less than the surface tension of the printing ink comprising at least one printing unit that can be activated and a final drying system downstream of this at least one printing unit that can be activated, for drying the at least one printing unit printing ink applied to the surface structure in an activatable printing unit, with at least one irradiation device having at least one electromagnetic radiation source each for irradiating and increasing the surface tension of the surface structure before it is fed to the first activatable printing unit being configured upstream of the first printing unit that can be activated in the process sequence, and with the radiation source being an elongated UV -Gas discharge tube or an elongated infrared heater.
  • a method for treating the surface of objects with fluids in which the fluid is applied using a first tool that can be moved under computer control and then further treated with the second tool that can be moved under computer control, the time delay between the application of the fluid to the object and the subsequent further treatment is adapted to the spreading behavior of the fluid.
  • the object of the invention is to create a method for printing a surface of a non-absorbent substrate with an ink to be applied by an inkjet printing device, with which non-absorbent substrates are printed with a print image of high print quality, in particular while avoiding the ink droplets spreading, despite the use of a water-based ink will.
  • the advantages that can be achieved with the invention are, in particular, that knowledge of the properties of the surface of the substrates to be printed that are actually present before printing and that influence wetting is not required, but that the substrates to be printed are preferably brought to a good, i.e . H. at least partial to very good, i. H. Complete wettability can be added, while at the same time possible negative effects on the printed substrates are avoided, or at least limited, by this measure.
  • Another advantage is a very flat print with a low haptic ink structure, ie a low relief formation, and a print with a high degree of gloss, which z. B. frequently asked requirements in the packaging market be fulfilled in a simple way.
  • substrates printed in this way can be formed without disruptive abrasion in the forming machine. This is also a good prerequisite for overcoating and a small and therefore environmentally friendly application of ink with water as an environmentally friendly solvent.
  • non-absorbent substrates in an industrial printing process with at least one water-based ink.
  • These substrates are z. B to preferably consist of a solid especially flat substrates, z. B. substrates each made of a metallic material, in particular sheet metal, z. B. from a steel sheet or from a tinplate or from an i. i.e. R. surface-oxidized aluminum material.
  • non-absorbent substrates made of, in particular, pre-lacquered wood, of a plastic or of a composite material can also be considered, provided these substrates are not damaged by heating during the printing process, e.g. B. dimensionally stable.
  • the substrates are preferably in the form of plates or slabs; B. but also be formed in web form or each as a round body.
  • metallic substrates are usually treated with a primer, e.g. B. with a white ground, and / or pre-coated with a varnish.
  • a primer e.g. B. with a white ground
  • a varnish e.g. B.
  • These substrates have z. B. an oiled or greased surface or treated with an anti-corrosion agent.
  • the surface of the substrates to be printed is in particular hydrophobic.
  • a z. B. pigment-based, especially soluble ink with a water content of at least 70%, especially at least 80% is used.
  • an ink without photoinitiators is preferably used.
  • a polar ink is used.
  • the respective ink is applied to the respective substrate by an inkjet printing device in the form of ink drops, in particular through the use of at least one inkjet print head that ejects the ink drops.
  • B. during a monodirectional movement (single pass method) or during a bidirectional movement (multi pass method) of the push button and / or the substrate in question are applied to the same.
  • the ink drops are usually applied in a grid having a plurality of positions in a precisely positioned manner on the relevant substrate. It can be provided that ink drops of variable size and/or that ink drops with different hues and/or that ink drops with different brightness intensities are respectively applied to the respective substrate.
  • color points from a basic color set e.g. B. CMYK used.
  • the surface tension of the substrates in question must be at least as high as the surface tension of the ink used. Only in this way can at least partial wetting of the respective surface of the relevant substrates with the intended ink take place. Otherwise, the ink drops applied to the non-absorbent surface of the substrates in question will contract and wetting will not be possible. If at all, if the surface tension of the substrates in question is insufficient, the result is at least an unclear, in particular blurred or pale or color-untrue and therefore unusable printed image.
  • the surface tension of the relevant substrates and the surface tension of the ink used are usually temperature-dependent. Other environmental conditions such. B. the humidity or certain surface properties of the substrates in question, such as their roughness and / or their pretreatment and / or their degree of contamination affect the wettability of the respective surface of these substrates.
  • the surface tension of solid substrates can e.g. B. be determined with commercially available test inks.
  • the surface tension of a water-based ink can e.g. B. using the ring method by Lecomte De Noüy or using the plate method by Wilhelmy or using the ironing method by Lenard with a tensiometer or by the capillary effect or approximately by a comparative measurement with test inks.
  • Oily or greased surfaces have a surface tension of around 30 mN/m.
  • substrates which each have a surface tension of less than e.g. 50 mN/m, preferably less than 45 mN/m. Therefore i. i.e. R. each at the same room temperature of z. B. 20°C the surface tension of the substrates intended for printing is lower than the surface tension of the water contained as a solvent in the ink and i. i.e. R. also lower than the surface tension of the ink used for printing itself.
  • the surface tension of this surface z. B. by at least 10%, preferably by more than 40% in each case to a value of at least 45 mN/m, in particular at least 50 mN/m, preferably to a value of over 70 mN/m. Only after this increase in surface tension, i. H. after the surface of the substrate to be printed has a sufficiently high surface tension, the ink drops are applied to the respective i. i.e. R. applied to the substrate having increased surface tension.
  • the surface tension of the substrates in question can be increased, e.g. B. by phosphating these substrates and / or by applying a suitable coating, z. B. be increased by applying a white base and / or a special coating.
  • the surface tension of the substrates in question can be increased by pretreating them with a corona method or with a plasma method or with a chemical method or by flame treatment or by UV irradiation or with other methods of surface activation.
  • a value is sought and set that not only reaches a minimum value for the preferably complete wettability of the surface of the substrates in question, but i. i.e. R. significantly exceeds.
  • the surface tension of the substrates in question which is increased beyond the minimum value for wettability, leads to a mostly strong spreading of the ink drops applied to their surface, ie to an undesired spreading of these ink drops on the surface of the substrates in question.
  • the spreading of the ink drops has a very rapidly changing color property in the printed image Consequence and / or leads to an unwanted flow of ink z. B. into micro-recesses of the substrate in question.
  • Another effect when using ink drops with different color tones is that these ink drops bleed, which can be caused by e.g. B. by a merging of different color dots and thus leads to completely undesirable color effects in the printed image, not only in color, but also in the sharpness of contours of printed structured surfaces such. B. in a font or on an image edge.
  • the 1 illustrates the proposed method for printing a surface of a non-absorbent substrate 01 with an ink to be applied by an inkjet printing device 02.
  • the substrate 01 is printed in an industrial printing process, preferably using a digital printing machine that has at least one inkjet printing device 02 and, for this purpose, e.g. B. transported along a transport route 09.
  • a device 03 for pretreating the substrate 01 to be printed in the form of a device that increases the surface tension of the surface of the substrate 01 to be printed, with this pretreating device 03 increasing the surface tension of the surface to be printed Surface of the substrate 01 increased at least to the value of the surface tension of the Inkjet printing device 02 corresponds to the ink to be applied to the surface of substrate 01.
  • This device 03 which increases the surface tension of the surface of the substrate 01 to be printed, pretreats the substrate 01 to be printed, e.g. B. with a corona method or with a plasma method or with a chemical method or by flame treatment or by UV radiation.
  • the substrate 01 to be printed is placed on a z. B. table-shaped workpiece carrier 04 z. B. laid flat.
  • the inkjet printing device 02 and the workpiece carrier 04 are designed and arranged relative to one another in such a way that the substrate 01 to be printed on, which is carried by the workpiece carrier 04, moves relative to the inkjet printing device 02, or such a relative movement can at least be carried out, with ink being applied to the surface by the inkjet printing device 02 during this relative movement of the substrate 01 to be printed is applied.
  • the ink can be applied to the surface of substrate 01 by either inkjet printing device 02 or workpiece carrier 04 during a monodirectional movement (single pass method) or during a bidirectional movement (multipass method).
  • the workpiece carrier 04 is heated to a temperature above the air temperature surrounding it and the substrate 01 carried by the workpiece carrier 04 is in turn z. B. by thermal conduction of the workpiece carrier 04 within a very short time, z. B. in the range of less than 1 second, preferably even in the range of a few milliseconds, i.e. in less than 50 ms, in particular in less than 10 ms, with the ink applied to the surface of substrate 01 subsequently also being heated, in particular by thermal conduction of substrate 01 heated by the workpiece carrier 04 in practically just as short a time, possibly with a permissible deviation, ie a tolerance of at most 5° C., preferably at most 2° C., in particular to e.g.
  • the ink applied to the substrate 01 is a temperature that is significantly higher than the temperature of the air surrounding the substrate 01 is thereby applied practically suddenly. Although the temperature of the ink applied to the substrate 01 is above the temperature of the air surrounding the substrate 01, it is below a boiling temperature of the solvent contained in the ink, with water being used as the solvent contained in the ink.
  • the heating of workpiece carrier 04, substrate 01 and ink applied thereto is in the 1 by e.g. B. obliquely upward arrows indicated.
  • the workpiece carrier 04 is preferably heated by a heating device, with which the temperature to be set for it is preferably regulated or at least can be regulated.
  • This heating of the ink applied to the substrate 01 results in a vapor layer above the liquid phase of this ink.
  • volatile components of the ink which are primarily the solvent contained in the ink, i.e. in particular the water, increasingly tend to change from the liquid phase of the ink into a gaseous phase as the temperature rises, resulting in the formation of vapor.
  • Evaporation below the boiling point of the solvent contained in the ink, i.e. in particular the water is also referred to as evaporation.
  • the evaporation rate and the vapor pressure prevailing in the vapor are on the one hand u. also depends on the material composition of the ink and its rheological properties. On the other hand, in the arrangement described above, they can also be influenced by the surface tension of the ink and/or by the surface tension of the substrate 01 carrying the ink and its temperature.
  • the vapor layer formed above the liquid phase of the ink is transported away by an air stream and thereby removed.
  • the air flow is through at least one nozzle unit 06; 07 provided, the respective blowing nozzle unit 06; 07 ejects the air flow towards the substrate 01 under machine environmental conditions.
  • air is usually heated and/or dehumidified beforehand.
  • a heating device that is preferably controlled or at least controllable in terms of the temperature to be set.
  • the respective blowing nozzle unit 06; 07 with at least one z. B. line-shaped heating device can be supplemented, the respective heating devices z.
  • B. are designed as a radiation source in the IR or near IR range and / or are designed as LED emitters.
  • the relative humidity of the respective nozzle unit 06; 07 expelled air flow is preferably less than 65%.
  • Of the respective nozzle unit 06; 07 provided air flow has a flow rate of z. B. more than 25 m / s, preferably more than 30 m / s, in particular more than 50 m / s or even more than 100 m / s.
  • This air flow is directed at an angle of z. B. 0° to 90°, preferably in a range between 30° and 45°, onto the substrate 01 carrying the ink, with this air flow preferably being directed in the same direction as the transport direction T of the substrate 01 in question.
  • a blow-out opening of the blow-out nozzle unit 06 in question which is preferably designed in the form of a slot transversely to the transport direction T of the substrate 01 in question; 07 is arranged at a distance of 0.1 mm to 10 mm, preferably 2 mm, above the printed surface of the substrate 01 in question.
  • the blowing nozzle unit 06 in question; 07 removes the vapor layer formed above the liquid phase of the ink, but does not displace the respective ink droplets applied to the substrate 01.
  • a monodirectional relative movement between substrate 01 and inkjet printing device 02, e.g. g. a single blower nozzle unit 07 in the direction of transport T of the substrate 01 in question immediately after the inkjet printing unit 02.
  • an intermediate drying device immediately before and after the inkjet printing unit 02 respective substrate 01 and/or the ink applied to the surface of substrate 01 has a blowing nozzle unit 06; 07 to arrange ( 1 ).
  • the blowing nozzle units 06; 07 not only in front of and behind the inkjet printing device 02, but also between individual segments and/or between different colored ones
  • the nozzles of this inkjet printing device 02 that emit ink can be or will be arranged in order to enable even more immediate intermediate drying of the individual ink jobs.
  • the ink applied to the surface of the substrate 01 is e.g. B. is dried by applying heat to the substrate 01 in question and/or to the applied ink in an intermediate drying process that differs from the heat conduction of the workpiece carrier 04, with this intermediate drying preferably being carried out by means of at least one blower nozzle unit 06; 07 is running.
  • the substrate 01 carrying the intermediately dried ink is then fed to a (hot air and/or IR) final dryer 08, which is usually of conventional design and is spatially separated from the inkjet printing device 02, and e.g. B. through this final dryer 08, with only this final drying brings about a complete physical drying of the ink and, if necessary, its crosslinking.
  • the intermediate drying of the ink application takes place during the printing process, i.e. practically at the same time as the printing process immediately after or before the printing passes, in particular by the respective blowing nozzle unit 06; 07 and is inextricably linked to the printing process.
  • the intermediate drying of the application of ink is supported and/or intensified by heating the substrate 01. From the respective nozzle unit 06; 07 discharged, preferably jet-shaped air flow settles on the surface of the substrate 01 and usually dries an entire area on this substrate 01.
  • the flow rate of the blowing nozzle unit 06; 07 determines the intensity of the drying of the ink applied to the surface of the substrate 01, this intensity increasing with the distance from the preferably slit-shaped blow-out opening of the respective blower nozzle unit 06; 07 decreases.
  • the respective blowing nozzle unit 06; 07 in each case a plurality of layers lying one behind the other in the transport direction T of the substrate 01 in question, preferably transverse to the transport direction T of the substrate 01 in question, e.g. B. slit-shaped exhaust openings.
  • the intermediate drying of the substrate 01 in question and/or the ink applied to the surface of the substrate 01 can be intensified by one or more heating devices arranged in particular in the area of the inkjet printing device 02. B.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Ink Jet (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP19761852.3A 2018-10-17 2019-08-29 Verfahren zum bedrucken einer oberfläche eines nichtsaugenden substrates mit einer von einer tintenstrahldruckeinrichtung aufzubringenden tinte Active EP3867076B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018125750.3A DE102018125750A1 (de) 2018-10-17 2018-10-17 Verfahren zum Bedrucken einer Oberfläche eines nichtsaugenden Substrates mit einer von einer Tintenstrahldruckeinrichtung aufzubringenden Tinte
PCT/EP2019/073110 WO2020078606A1 (de) 2018-10-17 2019-08-29 Verfahren zum bedrucken einer oberfläche eines nichtsaugenden substrates mit einer von einer tintenstrahldruckeinrichtung aufzubringenden tinte und digitaldruckmaschine zur ausführung dieses verfahrens

Publications (2)

Publication Number Publication Date
EP3867076A1 EP3867076A1 (de) 2021-08-25
EP3867076B1 true EP3867076B1 (de) 2022-09-07

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EP19761852.3A Active EP3867076B1 (de) 2018-10-17 2019-08-29 Verfahren zum bedrucken einer oberfläche eines nichtsaugenden substrates mit einer von einer tintenstrahldruckeinrichtung aufzubringenden tinte

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US (1) US11207895B2 (es)
EP (1) EP3867076B1 (es)
DE (1) DE102018125750A1 (es)
ES (1) ES2929486T3 (es)
WO (1) WO2020078606A1 (es)

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