EP0076905B2 - Procédé d'impression à plat - Google Patents

Procédé d'impression à plat Download PDF

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Publication number
EP0076905B2
EP0076905B2 EP82107281A EP82107281A EP0076905B2 EP 0076905 B2 EP0076905 B2 EP 0076905B2 EP 82107281 A EP82107281 A EP 82107281A EP 82107281 A EP82107281 A EP 82107281A EP 0076905 B2 EP0076905 B2 EP 0076905B2
Authority
EP
European Patent Office
Prior art keywords
printing
ink
roller
water
inks
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
EP82107281A
Other languages
German (de)
English (en)
Other versions
EP0076905A2 (fr
EP0076905A3 (en
EP0076905B1 (fr
Inventor
Rolf Dr. Kübler
Volker Dr. Schabacker
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.)
BASF Farben und Fasern AG
Original Assignee
BASF Lacke und Farben AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25796643&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0076905(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19813140360 external-priority patent/DE3140360C1/de
Priority claimed from DE19823223353 external-priority patent/DE3223353A1/de
Application filed by BASF Lacke und Farben AG filed Critical BASF Lacke und Farben AG
Priority to AT82107281T priority Critical patent/ATE27574T1/de
Publication of EP0076905A2 publication Critical patent/EP0076905A2/fr
Publication of EP0076905A3 publication Critical patent/EP0076905A3/de
Application granted granted Critical
Publication of EP0076905B1 publication Critical patent/EP0076905B1/fr
Publication of EP0076905B2 publication Critical patent/EP0076905B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41M1/06—Lithographic printing
    • B41M1/08—Dry 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

Definitions

  • the invention relates to a planographic printing process in which aqueous printing inks are transferred to the printing material without the use of a dampening unit using lithographic printing plates, the printing surfaces of which are hydrophilic and the non-printing surfaces are hydrophobic.
  • offset printing A well-known printing process is offset printing.
  • offset printing has gained considerable economic importance.
  • offset printing the incompatibility of water and oil is used to divide a homogeneous oil-based ink film on a printing plate into the corresponding information fields.
  • the offset printing plates have the properties of being water-friendly in the non-information-carrying areas and being oil-friendly in the information-carrying areas.
  • the plate is completely wetted with a water film (wash water), then it is colored with the oil-based printing ink.
  • the hydrophilic areas wetted by water cannot be wetted by the hydrophobic oil paint. In this way, a colored print image is created on the printing plate, which is transferred to the printing material via a roller mechanism.
  • the highly viscous printing inks used in offset printing require repeated rolling out to achieve an absolutely uniform color film across the entire width of the printing press.
  • Inking units of offset printing presses have up to 30 rollers, between which the pasty printing inks are rolled out. Because of this long and intensive rolling, low-boiling solvents cannot be used, as is usual in gravure printing, but only high-boiling solvents, since otherwise the printing ink dries on the inking rollers and the ink flow would be disturbed.
  • This process uses aqueous printing inks and uses an organic, hydrophobic wiping liquid instead of the wiping water used in the conventional offset printing process.
  • US-A-2 288 073 discloses a planographic printing process in which printing is carried out with aqueous printing inks without the use of a dampening unit.
  • the printing plates used in the process described in US-A-2 288 073 can only be used for copying typewriter letters, but not for printing full areas and halftone dots; they would not be able to withstand the stresses of modern offset printing machines, in which printing is carried out with rapid colors and at high speed, for long.
  • no waterfast prints are obtained with the inks used in the process disclosed in US-A-2,288,073.
  • the object of the present invention is to provide a planographic printing process in which the disadvantages of the prior art described above do not occur while retaining all the advantages of the conventional offset printing process.
  • aqueous printing inks are used using lithographic printing plates, the non-printing surfaces of which are hydrophobic, are transferred to the printing material, in which printing plates are used, the non-printing surfaces of which are coated with silicone rubber and their information-bearing surfaces are metal surfaces or hydrophilic plastic surfaces and printing inks which predominantly contain water and correspond to the aqueous printing inks of gravure or flexographic printing and a viscosity of 10 to 250 Pa.s, preferably 20 to 50 Pa.s, measured at 23 ° C.
  • the printing inks to be used according to the invention contain color pigments and / or soluble dyes, binders which fix the pigments on the printing material surface, other auxiliaries such as waxes, defoamers, disinfectants and thickeners which are used in other fields, for example aqueous printing inks for rotogravure or flexographic printing or are known from the field of aqueous paints and coatings. Both dispersions and water-soluble binders can be used as binders.
  • the printing inks mainly contain water as a solvent and / or dispersant. In addition to water, they can contain a minor amount of organic solvents that are completely or partially miscible with water. Small quantities of petroleum fractions can only be used as aids. It should be noted here that the printing ink retains its watery character.
  • Printing inks which correspond to the aqueous printing inks of gravure or flexographic printing but which have a higher viscosity than these can advantageously be used.
  • auxiliaries for improving the lubricity.
  • partial fluorination of the auxiliaries improves the abrasion resistance.
  • Inorganic or organic substances in particular soluble or swellable substances, are used as thickeners.
  • alginates starch
  • cellulose and their derivatives e.g. Cellulose ester or cellulose ether.
  • Mineral bodies which swell with polar solvents, act in the same way.
  • coloring components for example organic and inorganic color pigments, preferably directly from water pastes, and dyes soluble in water or in solvents are suitable for coloring. These products are known from other areas of printing and painting technology.
  • the printing inks to be used according to the invention are produced by known processes. So you can e.g. Incorporate pigments, pigment preparations or predispersed pigments into the aqueous binder solution or mixture using stirrers and dispersing units.
  • printing plates are advantageously used, the non-printing surfaces of which are coated with silicone rubber and the information-carrying surfaces are metal surfaces or hydrophilic plastic surfaces.
  • the non-printing surfaces of which are coated with silicone rubber and the information-carrying surfaces are metal surfaces or hydrophilic plastic surfaces.
  • printing plates such as are used for so-called waterless offset printing are suitable.
  • additives of additives containing silicone groups are useful. These can be dispersed silicone oils or water-soluble silicone derivatives.
  • the transfer of the printing inks from the inking unit of the printing press to the printing material can take place directly or via an intermediate carrier.
  • a blanket cylinder known from offset printing can serve as the intermediate carrier.
  • Offset printing machine can be used whose dampening system has been removed or deactivated. If necessary, the printing unit's inking unit is reduced, ie all rollers that are not necessary for inking are removed. This counteracts the faster evaporation of water compared to high-boiling mineral oils. It is also possible to encapsulate the inking unit for this purpose.
  • the printing inks are transferred to a printing plate cylinder and from there via a blanket cylinder to the printing material via an anilox roller with a doctor blade, via an ink transfer roller arranged downstream of the anilox roller.
  • the anilox roller advantageously works as an immersion roller, i.e. it protrudes into an ink tray.
  • ink transfer rollers instead of a single ink transfer roller, two or more ink transfer rollers working in parallel can also be used. It is essential, however, that the ink transfer rollers each work directly with the anilox roller and with the printing plate cylinder and not several rollers are connected in series.
  • the anilox roller works as an immersion roller, i.e. it protrudes into the ink supply.
  • the printing inks can of course also be applied to the doctor roller in another known manner, for example by brushing.
  • the disadvantages of the mechanical sensitivity of a rubber film forming an ink film are avoided by using a rastered metal roller. It is also more resistant to bending and can be precisely scraped off by using grid bars produced by etching or engraving as support elements.
  • the uniform ink-absorbing depressions over the entire width of the anilox roller ensure uniform coloring, regardless of the different ink consumption at different locations on the print motif. This also complies with the standardization in offset printing. With the previous inking units, the coloring cannot be kept constant during the printing process.
  • the inking unit heats up due to internal friction and through many splitting processes of the inks, which causes the inks to become less viscous during the print run. This changes the ink transfer and the ink layer thickness in the printed image. Waste can only be avoided by carefully regulating the color scheme by the printer.
  • the printing plate cylinder and the ink transfer roller advantageously have the same diameter. It is particularly advantageous if the anilox roller and the blanket cylinder also have the same diameter as the printing plate cylinder and the ink transfer roller.
  • a major advantage of the invention is the reduction in stenciling due to the short inking unit and the continuous renewal of the ink film by the anilox roller.
  • the temperature in the web offset heatset drying ovens can be significantly reduced, depending on the machine speed, substrate and ink layer thickness. This enables considerable energy savings.
  • the papers dry out less and thus remain dimensionally stable, i.e. they do not absorb any water from the environment after drying and no longer "grow" after processing or storage. Under favorable conditions, these inks can even be dried in web offset with IR emitters. These limit cases depend on paper, printing speed and ink layer thickness. In contrast to non-polar conventional oil-based offset inks, the water-based inks also respond to high-frequency dryers.
  • the invention is explained in more detail below on the basis of exemplary embodiments.
  • the figure shows a section through a planographic printing machine.
  • the planographic printing machine has an inking unit (13), a printing plate cylinder (3), a blanket cylinder (11) and an impression cylinder (9).
  • the printing material (10) runs between the rubber cylinder (11) and the impression cylinder (9).
  • the inking unit (13) consists of an anilox roller (1) which bears a doctor blade (2) and an ink transfer roller (4) which is arranged between the anilox roller (1) and the printing plate cylinder (3).
  • the anilox roller (1) protrudes into the ink tray (8). As the figure shows, all rollers or cylinders have the same diameter.
  • an aqueous emulsion of an alkali-soluble acrylate polymer having a solids content of 40% by weight 20 parts by weight of propylene glycol, 4 parts by weight of triethanolamine, 4 parts by weight of a 35% strength methyl silicone oil emulsion, 4 parts by weight.
  • Parts of mineral oil with a boiling range of 190-250 ° C and 8 parts by weight of starch ether mixed together.
  • 20 parts by weight of an aqueous pigment dough containing 45% by weight of copper phthalocyanine pigment were added to this mixture. The mass was dispersed on a three-roller to form a homogeneous printing ink.
  • An offset printing machine according to the figure was used as the printing machine.
  • a commercially available silicone-coated printing plate was used as the printing plate. It was printed on coated offset paper. The result was prints of excellent quality.

Landscapes

  • Printing Methods (AREA)
  • Coloring (AREA)

Claims (7)

1. Procédé d'impression à plat, suivant lequel des encres d'impression aqueuses sont transférées sur le matériau à imprimer avec utilisation de platines d'impression lithographique, dont les surfaces imprimantes sont hydrophiles et dont les surfaces non-imprimantes sont hydrophobes, où l'on utilise des platines d'impression dont les surfaces non-imprimantes sont revêtues par du caoutchouc au silicone et dont les surfaces portant les informations sont des surfaces métalliques ou des surfaces en matières plastiques hydrophile, et des encres d'impression qui contiennent de l'eau de façon prépondérante, qui correspondent aux encres d'impression aqueuses de l'impression en creux ou flexographique, et qui présentent une viscosité de 10 à 250 Pa.s, de préférence, de 20 à 50 Pa.s, mesurée à 23°C, et le transfert des encre d'impression par le mécanisme d'encrage avec rouleau à trame a lieu de la platine d'impression par un support intermédiaire sur le matériau à imprimer sans faire usage d'un dispositif de mouillage, sans l'utilisation du mélange usuel en impression offset d'eau et de graisse (liquide de mouillage hydrophobe organique).
2. Procédé selon la revendication 1, caractérisé par le fait que les encres d'impression aqueuses utilisées contiennent un additif d'huile de silicone ou de dérivés de silicone solubles dans l'eau.
3. Procédé selon l'une des revendications 1 ou 2, caractérisé par le fait qu'on utilise une machine d'impression offset connue en soi, dont le dispositif de mouillage a été supprimé ou a été mis hors fonctionnement.
4. Procédé selon l'une des revendications 1 à 3, caractérisé par le fait que les encres d'impression sont transférées par l'intermédiaire d'un rouleau à trame (1), auquel une racle (2) est adjacente,, par l'intermédiaire d'un rouleau (4) de transfert d'encre disposé en aval du rouleau à trame, sur un cylindre (3) à platine d'impression et, de celui-ci, par l'intermédiaire d'un cylindre à blanchet (11), sur le matériau à imprimer (10).
5. Procédé selon la revendication 4, caractérisé par le fait que le rouleau à trame (1) pénètre sous la forme d'un cylindre plongeur dans une cuve (8) d'encre d'impression.
6. Procédé selon la revendication 4 ou 5, caractérisé par le fait que le cylindre (3) à platine d'impression et le rouleau (4) de transfert d'encre présentent le même diamètre.
7. Procédé selon l'une des revendications 4 à 6, caractérisé par le fait que le rouleau à trame (1) et le cylindre à blanchet (11) présente le même diamètre que le cylindre (3) à platine d'impression et le rouleau (4) de transfert d'encre.
EP82107281A 1981-10-10 1982-08-11 Procédé d'impression à plat Expired - Lifetime EP0076905B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107281T ATE27574T1 (de) 1981-10-10 1982-08-11 Flachdruckverfahren.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3140360 1981-10-10
DE19813140360 DE3140360C1 (de) 1981-10-10 1981-10-10 Flachdruckverfahren und Druckfarben hierfür
DE3223353 1982-06-23
DE19823223353 DE3223353A1 (de) 1982-06-23 1982-06-23 Flachdruckverfahren und flachdruckmaschine zur durchfuehrung des verfahrens

Publications (4)

Publication Number Publication Date
EP0076905A2 EP0076905A2 (fr) 1983-04-20
EP0076905A3 EP0076905A3 (en) 1984-02-22
EP0076905B1 EP0076905B1 (fr) 1987-06-03
EP0076905B2 true EP0076905B2 (fr) 1991-05-02

Family

ID=25796643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107281A Expired - Lifetime EP0076905B2 (fr) 1981-10-10 1982-08-11 Procédé d'impression à plat

Country Status (8)

Country Link
US (1) US4903599A (fr)
EP (1) EP0076905B2 (fr)
BR (1) BR8205928A (fr)
CA (1) CA1198015A (fr)
DD (1) DD204230A5 (fr)
DE (1) DE3276471D1 (fr)
DK (1) DK157439C (fr)
ES (2) ES8404918A1 (fr)

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BR102012016393A2 (pt) 2012-07-02 2015-04-07 Rexam Beverage Can South America S A Dispositivo de impressão em latas, processo de impressão em latas, lata impressa e blanqueta
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US9555616B2 (en) 2013-06-11 2017-01-31 Ball Corporation Variable printing process using soft secondary plates and specialty inks
EP3007901B1 (fr) 2013-06-11 2020-10-14 Ball Corporation Procédé d'impression faisant intervenir des plaques photopolymères souples
US10086602B2 (en) 2014-11-10 2018-10-02 Rexam Beverage Can South America Method and apparatus for printing metallic beverage container bodies
ES2734983T3 (es) 2014-12-04 2019-12-13 Ball Beverage Packaging Europe Ltd Aparato de impresión
US10549921B2 (en) 2016-05-19 2020-02-04 Rexam Beverage Can Company Beverage container body decorator inspection apparatus
US11034145B2 (en) 2016-07-20 2021-06-15 Ball Corporation System and method for monitoring and adjusting a decorator for containers
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Also Published As

Publication number Publication date
EP0076905A2 (fr) 1983-04-20
ES524659A0 (es) 1984-10-01
BR8205928A (pt) 1983-09-13
DK445882A (da) 1983-04-11
ES8500135A1 (es) 1984-10-01
DK157439B (da) 1990-01-08
ES516396A0 (es) 1984-05-16
ES8404918A1 (es) 1984-05-16
US4903599A (en) 1990-02-27
EP0076905A3 (en) 1984-02-22
DE3276471D1 (en) 1987-07-09
DD204230A5 (de) 1983-11-23
EP0076905B1 (fr) 1987-06-03
CA1198015A (fr) 1985-12-17
DK157439C (da) 1990-05-28

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