EP3917782A1 - Verfahren zum bedrucken eines metallischen bedruckstoffes in einer druckmaschine - Google Patents
Verfahren zum bedrucken eines metallischen bedruckstoffes in einer druckmaschineInfo
- Publication number
- EP3917782A1 EP3917782A1 EP20700589.3A EP20700589A EP3917782A1 EP 3917782 A1 EP3917782 A1 EP 3917782A1 EP 20700589 A EP20700589 A EP 20700589A EP 3917782 A1 EP3917782 A1 EP 3917782A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- free
- radical
- lacquer
- chromium
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/28—Printing on other surfaces than ordinary paper on metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/02—Letterpress printing, e.g. book printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/02—Letterpress printing, e.g. book printing
- B41M1/04—Flexographic printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/06—Lithographic printing
-
- 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
- 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
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
Definitions
- the invention relates to a method for printing a metallic printing material in a printing press according to the preamble of claim 1.
- EP 1 503 899 A2 discloses a device for printing essentially non-absorbent printing material designed as metal plates, with a printing machine belonging to a printing line and having at least one printing unit equipped with printing ink, a first printing device and a second printing device being provided, that each belong to the pressure line and the
- Printing unit - as seen in the printing direction - are upstream, wherein - seen in the printing direction - the first printing device is followed by the second printing device, and the first printing device is equipped with UV-drying primer and the second printing device with UV-drying white lacquer and the first printing device and the the second printing device is followed by a UV drying device belonging to the printing line.
- EP 2 428 359 A1 describes a printing device for printing on
- Printing unit at least one irradiation device, each with at least one
- the electromagnetic radiation source for irradiating the fabric before it is supplied to the at least one active printing unit
- US 2018/0046114 A1 discloses a device for applying a decoration to an outer surface of a metallic container, comprising a device
- the electrophotographic system conveying a toner material onto the transfer printing form, and a feed unit to bring the metallic container into contact with the transfer printing form to feed the toner material from the transfer printing form to the outer surface of the metallic container for decoration transfer.
- US 2017/0354991 A1 discloses a method for producing a steel plate printed with a transparent pattern, comprising forming a printed color film layer by ejecting transparent ink onto at least one surface of a steel plate and curing the printed color film layer with ultraviolet light to produce a hardened one to form printed ink film layer and further preferably comprising performing preprocessing on the relevant surface of the steel plate with plasma before forming the printed ink film layer.
- DE 10 2006 044 957 A1 describes a method for transferring imaging and / or covering or covering application layers from a transfer film to printed sheets in a sheet-processing machine, in particular one
- Sheet-fed rotary printing press known, at least with one applicator for one imagewise or areal coating of a printing sheet with an adhesive and with at least one coating unit for transferring imaging or covering layers from the transfer film to the printing sheet, a transfer nip being formed in a coating unit and the transfer film along the surface of a press roller and with the coated side a printed sheet is placed and can be passed under pressure together with it through the transfer nip, so that the imaging or covering layers in areas provided with adhesive are transferred adhesively from the transfer film to the printed sheet, the printing machine being supplied with rigid, elastic printed sheets as sheet metal or plastic sheets, on at least one printed or coated or unprinted or
- Foil coating can be dried.
- the invention has for its object to provide a method for printing a metallic printing material in a printing press, in which this printing is possible on a bare, that is not primed surface of the sheet.
- Pretreatment of the surface of the metallic substrate to be printed It is not necessary to improve the adhesion of the printing ink or varnish to this surface and / or to improve the wettability of this surface with the printing ink or varnish, which can save costs.
- Metal packaging is used in particular in the form of cans, e.g. B. as tin cans for food or pet food, as spray cans for aerosols or as packaging for other chemical-technical products, as beverage cans or as closures in the form of lids or bottle caps, these packaging z.
- B. are made of a particularly corrosion-resistant steel sheet or aluminum sheet or a tinplate. It is often desired to produce metal packaging of this type, usually in very large numbers, preferably several million pieces, in an industrial printing process, i. H. to decorate with a printing press. This is particularly true for. B. in the beverage industry too.
- the z. B. is delivered as a board or as a steel coil.
- the following is preferably the printing of a surface of a tinplate, a tinplate being a thin cold-rolled steel plate, the surface of which is coated with tin.
- Tinplate thicknesses of 0.1 mm to 0.5 mm are currently common. Tinning primarily serves to protect against corrosion.
- the fuselage sheet which is preferably made of steel, is in the form of a chromium-free passivated sheet, i.e.
- CFPA sheet and not a chrome-plated ECCS sheet (electrolytic chromium coated steel) or a tin-plated ETP sheet which is passivated with chrome ( electrolytic tin ßlate).
- Titanium / zirconium passivation Alternatively or in addition to the materials titanium and
- Zirconium can be used to passivate the surface of the sheet in question, for.
- Central atom can be used.
- a mostly viscous printing ink or a mostly low-viscosity lacquer are each in a layer thickness, for. B. from 1 pm to 10 pm, preferably in a layer thickness in a range between 4 pm and 5 pm on the bare surface of the chromium-free passivated sheet in question by the use of at least one printing unit of a printing press, in each case directly and immediately, ie without the additional processing step of applying a primer to the surface in question before printing.
- Printing inks are colorant i. d. R. liquid mixtures and consist of dispersed, d. H. from i. d. Usually extremely finely divided pigments, binders and organic solvents.
- the printing ink black contains pigments made of soot, in particular gas black. Colored pigments are obtained from minerals or are manufactured chemically.
- Printing inks for printing processes in which the ink is applied by rollers require good transport of the printing ink over the inking rollers and low aerosol formation.
- the ink transport is determined by the speed of the printing ink.
- Speed is the force necessary to separate an ink film. It is a complex ratio of viscosity, cohesion and adhesion and is measured as a tack in the printing ink test.
- Aerosol formation is the formation of a paint mist and colored threads at high printing speeds. These aerosols are undesirable. Aerosol formation is strongly temperature-dependent, since it correlates directly with the viscosity.
- Printing inks essentially consist of:
- binders mainly of resins (solid resins, alkyd resins) to the
- auxiliaries for adjusting the rheological properties e.g. B. for
- Lacquer is a liquid or powdery coating material that is applied thinly to an object and is built up into a continuous, solid film by chemical or physical processes that act in particular on its solvent. Varnishes exist i. d. R. from binders, fillers, pigments,
- Solvents, resins and / or acrylates and additives, such as biocides are sold by the Dow Chemical Company.
- Emission-free, especially radiation-curing lacquer a monomer serves as a “solvent” that polymerizes into the lacquer film during curing. It is a low molecular weight binder with low vapor pressure, which is preferably used via UV-induced processes such. B. chemically cures within fractions of a second. A UV high-power lamp is usually used as the radiation source. The same applies to binders used in a printing ink.
- the printing ink or varnish is suitable for.
- B. a printing process using a printing form.
- the chrome-free passivated surface of the metallic printing material, i. H. Sheets can be printed in an offset printing process or in a high-pressure process or in a flexographic printing process.
- a free-radically hardening printing ink or a free-radically hardening lacquer is used as a printing fluid, ie as a printing ink or as a lacquer.
- a printing ink or varnish is in each case radiation-curing, in particular UV-curing.
- the curing of the printing ink or lacquer takes place radically and thus suddenly - ie in a very short time, preferably in less than 1 second, in particular within fractions of a second - and z. B. not cationic.
- An initiation of the curing of the printing ink or lacquer takes place in each case, for. B. by a the substrate-directed radiation from a radiation source, in particular with ultraviolet radiation from a UV radiation source or with a
- a radical hardening is carried out by a radical polymerization, which essentially takes place in the following three sub-steps:
- a radical added as an initiator of the printing ink or lacquer breaks a multiple bond, e.g. B.
- the primary radical is constantly deposited in a growth reaction.
- a chain break is caused by the meeting of two radicals, i.e. by their combination. Chain disruption can also be brought about by disproportionation.
- Chain growth reactions are the aforementioned cationic chain polymerization or an anionic chain polymerization or a coordinative chain polymerization. These chain polymerizations differ in their mechanistic course from the radical chain polymerization according to the invention.
- radical chain polymerization a cation or an anion or a is not added after the start reaction coordinative complex, but a radical attached to the growing polymer chain.
- the formation of the polymers proceeds as a generally unbranched chain reaction.
- the result of this growth is that macromolecules, ie polymers with long chains, are formed even at very low conversions and large amounts of monomers are present unchanged.
- the growth of the polymer chains in a chain growth reaction, in particular in a radical polymerization is much faster than e.g. B. in a step growth reaction.
- Radicals are atoms or molecules with at least one unpaired valence electron that are particularly reactive.
- the unpaired valence electron is located e.g. B. on C, N, O or halogens. Frequently used radicals are oxygen, nitrogen monoxide, the hydroxyl radical, chlorine radicals or bromine radicals. Radicals are i. d. Usually very reactive and therefore also very short-lived with a lifespan of i. d. R. less than 1 second.
- At least one radical initiator - also called an initiator - is added to the reaction mixture formed as a printing ink or varnish, in particular the respective binder of the printing ink or varnish in question.
- This radical starter is a molecule that can be split into radicals particularly easily - for example by irradiation with ultraviolet light. examples for
- Radical initiators are azobis / sobutyronitrile, dibenzoyl peroxide, dilauroyl peroxide, di-tert-butyl peroxide, diisopropyl peroxidicarbonate and / or potassium peroxodisulfate.
Landscapes
- Printing Methods (AREA)
- Table Devices Or Equipment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019101998.2A DE102019101998A1 (de) | 2019-01-28 | 2019-01-28 | Verfahren zum Bedrucken eines metallischen Bedruckstoffes in einer Druckmaschine |
| PCT/EP2020/050687 WO2020156788A1 (de) | 2019-01-28 | 2020-01-13 | Verfahren zum bedrucken eines metallischen bedruckstoffes in einer druckmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3917782A1 true EP3917782A1 (de) | 2021-12-08 |
| EP3917782B1 EP3917782B1 (de) | 2022-11-23 |
Family
ID=69159792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20700589.3A Active EP3917782B1 (de) | 2019-01-28 | 2020-01-13 | Verfahren zum bedrucken eines metallischen bedruckstoffes in einer druckmaschine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3917782B1 (de) |
| DE (1) | DE102019101998A1 (de) |
| ES (1) | ES2938521T3 (de) |
| WO (1) | WO2020156788A1 (de) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19750259B4 (de) * | 1997-02-17 | 2008-09-18 | Heidelberger Druckmaschinen Ag | Verfahren und Druckmaschine zum mehrfarbigen Bedrucken von nichtsaugendem Material |
| JP2001002969A (ja) * | 1999-06-23 | 2001-01-09 | Dainippon Ink & Chem Inc | 紫外線硬化型金属印刷インキ組成物及びそれを用いた被覆方法 |
| DE60120305T2 (de) | 2000-08-04 | 2007-06-06 | Toyo Seikan Kaisha, Ltd. | Verwendung einer Druckfarbe, Druckverfahren und bedrucktes Verpackungsmaterial |
| JP4992168B2 (ja) * | 2001-06-29 | 2012-08-08 | Dic株式会社 | 紫外線硬化型サイズコート用インキ、印刷金属材料および金属材料の印刷方法 |
| DE10218277B4 (de) | 2002-04-19 | 2007-06-28 | Ltg Technologies Plc | Einrichtung zum Bedrucken von Druckmaterial sowie entsprechendes Verfahren |
| DE102006044957A1 (de) * | 2006-04-01 | 2007-10-04 | Man Roland Druckmaschinen Ag | Prägebeschichtung für steif-elastische Bedruckstoffe |
| CH703704A1 (de) | 2010-09-14 | 2012-03-15 | Hoffmann Neopac Ag | Druckvorrichtung und Verfahren zum Bedrucken von Flächengebilden. |
| US20150239272A1 (en) * | 2011-09-16 | 2015-08-27 | Golden Aluminum, Inc. | Application of designs to portion of food container |
| KR101674766B1 (ko) * | 2014-12-23 | 2016-11-10 | 주식회사 포스코 | 투명 패턴 프린트 강판 제조 방법 |
| MX395129B (es) * | 2016-08-10 | 2025-03-24 | Ball Corp | Metodo y aparato para decorar un recipiente metalico por impresion digital a una manta de transferencia. |
-
2019
- 2019-01-28 DE DE102019101998.2A patent/DE102019101998A1/de not_active Withdrawn
-
2020
- 2020-01-13 EP EP20700589.3A patent/EP3917782B1/de active Active
- 2020-01-13 WO PCT/EP2020/050687 patent/WO2020156788A1/de not_active Ceased
- 2020-01-13 ES ES20700589T patent/ES2938521T3/es active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3917782B1 (de) | 2022-11-23 |
| WO2020156788A1 (de) | 2020-08-06 |
| DE102019101998A1 (de) | 2020-07-30 |
| ES2938521T3 (es) | 2023-04-12 |
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