EP1254768B1 - Formation et effacement d'images sur une plaque d'impression fabriquée d'un polymère ayant des groupes imides - Google Patents

Formation et effacement d'images sur une plaque d'impression fabriquée d'un polymère ayant des groupes imides Download PDF

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Publication number
EP1254768B1
EP1254768B1 EP02007336A EP02007336A EP1254768B1 EP 1254768 B1 EP1254768 B1 EP 1254768B1 EP 02007336 A EP02007336 A EP 02007336A EP 02007336 A EP02007336 A EP 02007336A EP 1254768 B1 EP1254768 B1 EP 1254768B1
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EP
European Patent Office
Prior art keywords
printing
printing form
chemical treatment
hydrophilic
hydrophobic
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
EP02007336A
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German (de)
English (en)
Other versions
EP1254768A3 (fr
EP1254768A2 (fr
Inventor
Joaquin Barrera Calderon
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to DK02007336T priority Critical patent/DK1254768T3/da
Publication of EP1254768A2 publication Critical patent/EP1254768A2/fr
Publication of EP1254768A3 publication Critical patent/EP1254768A3/fr
Application granted granted Critical
Publication of EP1254768B1 publication Critical patent/EP1254768B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1041—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by modification of the lithographic properties without removal or addition of material, e.g. by the mere generation of a lithographic pattern

Definitions

  • the invention relates to a method for producing a structure of hydrophilic and hydrophobic areas on a surface, which in a first, substantially unstructured state has a polymer material with imide groups. Furthermore the invention relates to a printing form, in particular for use as a printing plate in Offset printing, with a surface for printing.
  • the lithographic printing is based, in simple terms, on the utilization of the Immiscibility of oil and water on a surface, the so-called printing plate, wherein the lipophilic (hydrophobic) solution or the ink or color through the image forming areas and the water or the hydrophilic solution through the Non-image forming areas of the printing surface are held.
  • the in suitably prepared printing surface with hydrophilic and lipophilic substance or solution, especially water and ink or paint is wetted, so keep the non-image areas preferably the hydrophilic substance or solution and back repel the lipophilic substances, while the imagewise areas the lipophilic solution or accept ink or paint and repel the hydrophilic substances.
  • the lipophilic substance in a suitable manner on the surface of a material on which the image is to be fixed, for example paper, fabric, polymers and the same.
  • the aluminum has been used as a material for printing plates. Usually The aluminum is first a graining process and then a subsequent Subjected to anodization.
  • the anodization serves to anodic To provide oxide layer whose adhesion is improved by the grain.
  • the Graining becomes the hydrophilic properties of the background of the printing plate strengthened.
  • a strong acid such as sulfur or Phosphoric acid used to subsequently by another method, such as For example, in a thermal silicization process or the so-called Electrosilication to make the surface hydrophilic.
  • a large number of radiation-sensitive materials that are used to generate images in the Use of the lithographic printing process are suitable, in that they after Exposure and, if necessary, necessary development and fixation provide an image-wise area that can be used for printing.
  • photopolymerizable substances can be used for this purpose.
  • the arrangement described above is subjected to imagewise exposure by locally selective energy is supplied. This can, for example, by means of exposure through a mask with UV light or by direct writing with a laser respectively.
  • lithographic printing plates of the type described above are usually with treated a developer solution, which is typically an aqueous alkaline or basic solution with organic additives.
  • oxide ceramics which for example in the form of Coatings are present on a printing plate, find use.
  • EP 0 911 154 A1 proposes, as materials for the plate surface, titanium dioxide (TiO 2 ) and zirconium dioxide (ZrO 2 ), which can be present in ceramic form both pure and with other metallic additives in different mixing ratios.
  • This surface is hydrophobic when unexcited and can be rendered hydrophilic by irradiation with ultraviolet light. Imaging is now done by illuminating the entire surface of the plate with ultraviolet light and masking areas of ink which are to be printed.
  • titanium dioxide layers as a substrate turns out to be a particular disadvantage
  • the titanium dioxide layers are switchable with UV light, but a small Have stability with respect to the timing of the switching.
  • a sufficient Switching or sufficient stroke d. H. a sufficient flip from hydrophilic to hydrophobic can only be achieved in insufficient strength.
  • the complete cleaning of the substrate after the pressure is not to be underestimated Problem in practice.
  • From US 4,568,632 is the structuring of polymer surfaces or polymer films known which at least one imide group in the corresponding monomer, be it in the main chain or a side chain of the polymer built therefrom. It will a method for etching or ablation of polyimide without chemical Treatment steps disclosed.
  • the polyimide is irradiated with ultraviolet light Wavelength shorter than 220 nm, for example, by an argon-fluoride excimer Laser exposed so that a photocatalytic decomposition takes place, wherein volatile Products are removed by suitable means.
  • the reaction takes place in an atmosphere, which Having oxygen.
  • Structuring can be done, for example, by using a Large-area illuminated mask or by scanning the surface with a Exposure beam for spatially selective reaction can be achieved. This structuring can without significantly affecting the surface remaining polyimide be achieved. A structuring of the surface into hydrophobic and hydrophilic Areas, in particular a use of the structured surface for the Printing process according to a lithographic process or an offset process therefore can not be achieved.
  • Document EP 0 743 177 A1 discloses a lithographic printing plate and a method for structuring such a lithographic printing plate.
  • a pulsed laser beam having a wavelength in the ultraviolet spectral range for example, an ArF excimer laser
  • a thermoplastic polymer film for example, a polyimide surface having selectively exposed locally. The exposed areas are color-rejecting while the unexposed areas are color accepting.
  • This object is achieved by a method for producing a structure of hydrophilic and hydrophobic areas on a surface having the features according to claim 1 and by a printing forme having the features according to claim 11 solved.
  • those needed for the lithographic printing process hydrophobic and hydrophilic regions on a polyimide surface thereby produced, that they are optionally imaged after a chemical initialization or is structured by the imaging is done by electromagnetic radiation and completed by another chemical reaction. After printing can deletion of the imaged structure by another chemical reaction.
  • the method according to the invention provides a printing plate, which are used for printing in a conventional wet offset method can.
  • the printing form according to the invention is also suitable for printing with additive-free dampening solution, such as pure water, so for example without the usual used isopropanol.
  • the structured polyimide surface is replaced by another chemical process can be extinguished.
  • the invention Method provides a reversibly writable and erasable surface Available.
  • polyimide is understood as meaning a polymer material whose associated monomer is the functional group of an imide having. In this case, this group can occur in the main chain or a side chain of the polyimide.
  • the polyimide is abbreviated to polybenzoldiimide (PBDI) for short
  • PAI polyamide-imide
  • the process according to the invention can also be used with other imide-containing substances.
  • the polymer used is highly hydrophobic in its original state, so it is good for ink-carrying.
  • the method according to the invention for producing a structure of hydrophilic and hydrophobic regions on a surface which has a polymer material with imide groups in a first, essentially unstructured state is characterized in that a locally selective exposure to electromagnetic radiation through local irradiation Energy is carried out in time subsequent chemical treatment of the surface with an oxidizing agent.
  • the electromagnetic energy is preferably generated by a UV light source which emits light having a wavelength between 220 and 460 nm.
  • the oxidizing agent hydrogen peroxide (H 2 O 2 ), oxygen (O 2 ), ozone (O 3 ) or potassium permanganate (KMnO 4 ) or combinations of these oxidizing agents may preferably be used.
  • a liquid with ionic surfactants can also be used in the subsequent chemical treatment.
  • the locally selective exposure can be preceded by a large-scale surface chemical treatment with a strong base.
  • the strong base is preferably an aqueous solution of potassium hydroxide (KOH) and / or sodium hydroxide (NaOH).
  • a large-scale chemical treatment of the surface is made with a strong acid.
  • the strong acid is preferably an aqueous solution of sulfuric acid (H 2 SO 4 ) and / or hydrochloric acid (HCl) and / or nitric acid (HNO 3 ) and / or the like.
  • the large-area chemical treatment of the surface can be carried out with a suitable corresponding plate cleaner.
  • a printing form according to the invention which in particular for use as a printing plate in offset printing, includes a surface for printing, which is a Polymer material having imide groups, preferably PBDI or PAI.
  • a surface for printing which is a Polymer material having imide groups, preferably PBDI or PAI.
  • Such Surface is with the method according to the invention, in particular with the individual options described above, structurable. Consequently, the invention provides a rewritable printing form created.
  • the printing form of the invention in a printing unit or a printing press are used.
  • a printing unit is distinguished characterized in that it is provided for printing with a printing form according to the invention.
  • a printing machine in particular an offset printing machine, with at least one Feeder, a printing unit and a boom then has at least one printing unit, which is provided for printing with a printing form according to the invention.
  • FIG. 1 shows a flow diagram of the method according to the invention with a chemical initialization step involving a treatment with a basic substance includes.
  • the flowchart serves to explain the individual process steps and their order.
  • the polymer material used in the process according to the invention is a substance which in the first, original state strongly hydrophobic, ie at the same time good color leading, is.
  • the polymer material is subjected to a base treatment. For example, it will for a certain time interval in the minute range of an aqueous solution of a strong Base, such as potassium hydroxide or sodium hydroxide exposed. Through this Treatment, the polymer material becomes hydrophilic. Through a large area Base treatment 10 thus the surface is hydrophilic over a large area. In this condition the actual structuring is carried out: it becomes the color-leading and not color-guiding areas, ie image locations and not image locations. It will be one local exposure 12 by electromagnetic radiation, preferably in the UV range, performed. The next step is an oxidation 14.
  • a strong Base such as potassium hydroxide or sodium hydroxide exposed.
  • the oxidizing agent For example, hydrogen peroxide, potassium permanganate or the like, switches or develops the property of the surface, which of the electromagnetic radiation was exposed.
  • hydrophilic areas now become hydrophobic.
  • a treatment of the surface with a polysaccharide or polysaccharide mixture, preferably D-arbinose and / or D-fructose This additional optional step improves a stabilization of the hydrophobic or hydrophilic areas.
  • the thus structured surface is now ready to print.
  • the pressure 16 can by means of a Acid treatment 18 the structuring of the surface can be erased.
  • a strong acid such as an aqueous solution of Sulfuric acid, hydrochloric acid, nitric acid or the like or plate cleaner exposed.
  • This process step makes the surface hydrophobic again. It is possible one Iteration 110 to perform the specified sequence of steps.
  • a Renewed local exposure 12 can be one structure with another, in general deviating topography can be produced on the surface.
  • FIG. 2 is a flowchart of the direct method according to the invention Structuring of the polyimide surface by electromagnetic radiation. This Flowchart is used to explain the individual process steps and their Sequence.
  • the used polymer material which in a first, originally hydrophobic state is exposed to a local exposure 20.
  • the time subordinate Oxidation 22 structuring is achieved: the localized exposed areas are now hydrophilic.
  • the thus structured surface can be used for printing 24 be used.
  • acid treatment 26 it is possible to change the structure hydrophilic and hydrophobic areas to delete.
  • the surface is through the Acid treatment 26 converted to the first, hydrophobic state. So it is again possible to carry out an iteration 28 of the steps of the method according to the invention.
  • FIG. 3 schematically illustrates the structuring of a printing form, its surface Having polyimide, by means of the inventive method including a chemical initialization step.
  • five states of the printing plate 30 shown in the order indicated by the arrows temporal order.
  • the Printing form 30 on a surface which has a large area hydrophobic region 32nd represents.
  • the surface becomes large area in a hydrophilic region 34th transformed.
  • Selective exposure causes locally limited areas first type 36 generated on the large area hydrophilic surface 34.
  • Subsequent oxidation produces hydrophobic regions 32 in addition to hydrophilic regions Areas 34.
  • a structuring of the surface of the printing plate 30 is achieved. This structure can be erased by the printing plate 30 a large area Acid treatment is subjected. After this step, the printing plate 30 is again with a large area hydrophobic area 32 before.
  • the polymer material preferably PBDI or PAI
  • PBDI or PAI is applied in a thickness between a still manageable film of about 25 microns to a layer thickness of a few millimeters on a suitable support, for example on an aluminum plate.
  • the surface of the applied polymer material is then subjected to a base treatment, wherein preferably sodium hydroxide (NaOH) and / or potassium hydroxide (KOH) is used.
  • NaOH sodium hydroxide
  • KOH potassium hydroxide
  • concentrations for example, 0.5 to 1 molar solutions are used with sodium hydroxide, it being noted that too high concentrations (of about 5 molar solution) may destroy the polymeric material.
  • the polymer material which is originally completely hydrophobic in its first state, is essentially completely hydrophilized by the base treatment, whose duration is substantially completely in the range of a few minutes, preferably about one minute.
  • the imaging takes place either through a mask or through locally selective illumination by a light beam which is directed locally to the printing surface.
  • a UV laser is preferably used as the light source.
  • the locally selective exposure is to be regarded as an initialization reaction, followed by a chemical treatment of the surface.
  • the exposed surface is then exposed to an oxidizing agent, e.g. As hydrogen peroxide (H 2 O 2 ), oxygen or ozone.
  • an oxidizing agent e.g. As hydrogen peroxide (H 2 O 2 ), oxygen or ozone.
  • potassium permanganate (KMnO 4 ) can also be used in the liquid phase.
  • the preferred concentration of hydrogen peroxide is a 15% solution of hydrogen peroxide in water.
  • a 0.02 molar solution in water is preferably used.
  • the polymeric printing form thus prepared is used for printing. After printing, the printing form can be erased and cleaned at the same time, whereby all the usual known mechanical cleaning options can be used per se:
  • the surface is exposed to a strong acid, eg. As sulfuric acid (H 2 SO 4 ), hydrochloric acid (HCl) or nitric acid (HNO 3 ).
  • the acids should preferably all be present in a concentration of 1 molar solution.
  • FIG 4 is a schematic representation of the structuring of a printing plate, whose Surface polyimide, by means of the inventive method without chemical initialization step shown by treatment with a basic substance.
  • Fig. 4 shows four states of the printing plate 30, whose temporal order by the arrows is indicated.
  • the printing plate 30 is a large area hydrophobic Area 32 before.
  • initialized regions of the second type 38 are generated on the surface of the printing form 30.
  • oxidation it becomes hydrophilic regions 34.
  • the surface thus has one Structure of hydrophobic areas 32 and hydrophilic areas 34 so that they to Printing can be used.
  • After a large-scale treatment with a strong Acid the surface of the printing plate 30 is achieved that the printing form over a large area again hydrophobic.
  • FIG. 1 shows the process of the locally selective one described with reference to FIG Exposure by local irradiation of electromagnetic energy to a reverse one Hydophilization or hydrophobing result, if the printing form temporally is subsequently exposed to a chemical treatment by an oxidizing agent.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Materials For Photolithography (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Rotary Presses (AREA)
  • Liquid Developers In Electrophotography (AREA)

Claims (14)

  1. Procédé pour produire une structure constituée de zones hydrophiles (34) et hydrophobes (32) sur une surface d'une plaque ou forme d'impression (30), présentant dans un premier état sensiblement non structuré, un matériau polymère ayant des groupes imides, selon lequel la surface de la forme d'impression (30) est irradiée partiellement de manière sélective en étant soumise à un rayonnement localisé d'énergie électromagnétique,
    caractérisé par un traitement chimique de la surface avec un agent d'oxydation, succédant dans le temps à l'irradiation.
  2. Procédé selon la revendication 1,
    caractérisé par un traitement chimique de grande surface de la surface considérée avec une base forte, qui précède dans le temps l'irradiation sélective localisée.
  3. Procédé selon la revendication 1 ou 2, comprenant une étape de procédé supplémentaire, succédant dans le temps, de transformation de la surface dans le premier état sensiblement non structuré,
    caractérisé par un traitement chimique de grande surface de la surface considérée avec un acide fort.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que l'énergie électromagnétique est produite par une source de lumière U.V., qui émet de la lumière d'une longueur d'onde comprise entre 220 et 460 nm.
  5. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que l'agent d'oxydation comprend du peroxyde d'hydrogène (H2O2) et/ou de l'oxygène (O2) et/ou de l'ozone (O3) et/ou du permanganate de potassium (KMnO4).
  6. Procédé selon l'une des revendications 2 à 5,
    caractérisé en ce que la base forte est une solution aqueuse d'hydroxyde de potassium (KOH) et/ou d'hydroxyde de sodium (NaOH).
  7. Procédé selon l'une des revendications 3 à 6,
    caractérisé en ce que l'acide fort est une solution aqueuse d'acide sulfurique (H2SO4) et/ou d'acide chlorhydrique (HCl) et/ou d'acide nitrique (HNO3).
  8. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'outre l'agent d'oxydation, pendant le traitement chimique succédant dans le temps, on utilise un liquide avec des dérivés tensioactifs ioniques.
  9. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que le matériau polymère avec groupes imides est du PBDI ou PAI.
  10. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'au traitement chimique de la surface avec un agent d'oxydation, succède dans le temps la mise en contact de ladite surface avec un polysaccharide.
  11. Plaque ou forme d'impression (30), notamment destinée à l'utilisation en tant que forme d'impression (30) pour l'impression offset, comportant une surface pour l'impression qui présente dans un état sensiblement non structuré, un matériau polymère avec des groupes imides,
    caractérisée par des zones hydrophiles (34) et hydrophobes (32), qui peuvent être obtenues par un procédé selon l'une des revendications précédentes.
  12. Forme d'impression (30) présentant une surface selon la revendication 11,
    caractérisée en ce que la surface comprend du PBDI ou PAI.
  13. Groupe d'impression,
    caractérisé en ce que le groupe d'impression est pourvu, pour l'impression, d'une forme d'impression (30) selon la revendication 11 ou 12.
  14. Machine à imprimer comprenant au moins un dispositif d'alimentation ou margeur d'entrée, un groupe d'impression et un dispositif de sortie,
    caractérisée en ce que la machine à imprimer comprend au moins un groupe d'impression selon la revendication 13.
EP02007336A 2001-05-03 2002-04-05 Formation et effacement d'images sur une plaque d'impression fabriquée d'un polymère ayant des groupes imides Expired - Lifetime EP1254768B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK02007336T DK1254768T3 (da) 2001-05-03 2002-04-05 Billeddannelse og sletning fra en trykform af polymermateriale med imidgrupper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10121561A DE10121561A1 (de) 2001-05-03 2001-05-03 Bebilderung und Löschung einer Druckform aus Polymermaterial mit Imid-Gruppen
DE10121561 2001-05-03

Publications (3)

Publication Number Publication Date
EP1254768A2 EP1254768A2 (fr) 2002-11-06
EP1254768A3 EP1254768A3 (fr) 2003-09-03
EP1254768B1 true EP1254768B1 (fr) 2005-02-09

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EP02007336A Expired - Lifetime EP1254768B1 (fr) 2001-05-03 2002-04-05 Formation et effacement d'images sur une plaque d'impression fabriquée d'un polymère ayant des groupes imides

Country Status (9)

Country Link
US (1) US6919165B2 (fr)
EP (1) EP1254768B1 (fr)
JP (1) JP4657563B2 (fr)
CN (1) CN1264676C (fr)
AT (1) ATE288830T1 (fr)
CZ (1) CZ300557B6 (fr)
DE (2) DE10121561A1 (fr)
DK (1) DK1254768T3 (fr)
HK (1) HK1053087B (fr)

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DE10206938A1 (de) * 2002-02-19 2003-09-04 Oce Printing Systems Gmbh Verfahren und Einrichtung zum Drucken, wobei eine hydrophile Schicht erzeugt und diese strukturiert wird
US6566039B1 (en) * 2002-06-04 2003-05-20 Gary Ganghui Teng Variable data lithographic printing device and method
US6789478B1 (en) * 2003-02-28 2004-09-14 Heidelberger Druckmaschinen Ag Device and method for controlling fluid delivery
US7879535B2 (en) * 2004-03-26 2011-02-01 Fujifilm Corporation Pattern forming method, graft pattern material, conductive pattern forming method and conductive pattern material
DE102005046863A1 (de) * 2005-09-30 2007-06-14 Man Roland Druckmaschinen Ag Druckform
US7709185B2 (en) 2006-03-24 2010-05-04 Heidelberger Druckmaschinen Ag Method for imaging a lithographic printing form
US20100251914A1 (en) * 2009-04-01 2010-10-07 Xerox Corporation Imaging member
CN112571697A (zh) * 2020-10-12 2021-03-30 安徽美阅文化发展股份有限公司 一种纸张印刷品深压纹凹凸版的生产工艺

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Also Published As

Publication number Publication date
DE10121561A1 (de) 2002-11-07
JP4657563B2 (ja) 2011-03-23
EP1254768A3 (fr) 2003-09-03
HK1053087B (zh) 2007-01-12
US20020177053A1 (en) 2002-11-28
JP2003011316A (ja) 2003-01-15
HK1053087A1 (en) 2003-10-10
US6919165B2 (en) 2005-07-19
CN1387998A (zh) 2003-01-01
DE50202196D1 (de) 2005-03-17
EP1254768A2 (fr) 2002-11-06
CZ20021199A3 (cs) 2003-01-15
CZ300557B6 (cs) 2009-06-17
ATE288830T1 (de) 2005-02-15
DK1254768T3 (da) 2005-04-11
CN1264676C (zh) 2006-07-19

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