EP0306933B1 - Druckplatte, insbesondere für den Zeitungsrotations-Hochdruck - Google Patents

Druckplatte, insbesondere für den Zeitungsrotations-Hochdruck Download PDF

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Publication number
EP0306933B1
EP0306933B1 EP88114640A EP88114640A EP0306933B1 EP 0306933 B1 EP0306933 B1 EP 0306933B1 EP 88114640 A EP88114640 A EP 88114640A EP 88114640 A EP88114640 A EP 88114640A EP 0306933 B1 EP0306933 B1 EP 0306933B1
Authority
EP
European Patent Office
Prior art keywords
printing
layer
plastic
printing plate
printed
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
EP88114640A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0306933A3 (en
EP0306933A2 (de
Inventor
Dieter Güls
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.)
Bonner Zeitungsdruckerei und Verlagsanstalt H Neusser & Co KG GmbH
Original Assignee
Bonner Zeitungsdruckerei und Verlagsanstalt H Neusser & Co KG GmbH
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 Bonner Zeitungsdruckerei und Verlagsanstalt H Neusser & Co KG GmbH filed Critical Bonner Zeitungsdruckerei und Verlagsanstalt H Neusser & Co KG GmbH
Priority to AT88114640T priority Critical patent/ATE84750T1/de
Publication of EP0306933A2 publication Critical patent/EP0306933A2/de
Publication of EP0306933A3 publication Critical patent/EP0306933A3/de
Application granted granted Critical
Publication of EP0306933B1 publication Critical patent/EP0306933B1/de
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
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/12—Printing plates or foils; Materials therefor non-metallic other than stone, e.g. printing plates or foils comprising inorganic materials in an organic matrix

Definitions

  • the invention relates to a printing plate with a plastic cover layer, an adhesive layer and a metal carrier for printing on printing materials such as paper, cardboard, plastic film or the like, in particular in the newspaper rotary high-pressure process.
  • mineral and vegetable oil-containing inks of different viscosity and consistency are used, the properties of which are ultimately determined by the printing material and the coverage requirement, the path and penetration behavior, the drying property and the smudge resistance.
  • inking units In order to bring the required amount of ink onto the printing plate and from there onto the printing substrate, a wide variety of inking units are used, from simple lifter inking units through film inking units to modern anilox inking units, which have the task of ink distribution, ink quantity control and inking of the printing plates.
  • This creates differences that require very different color variants due to their technical conception.
  • the required reproduction-related amount of ink can only be measured in the page-occupied printing direction, the areal interval sequence not being controllable, from which it follows that the saturation of the printing plate with ink at high density inevitably leads to oversaturation in the areas with lighter elements in the interval sequence in the printing direction.
  • the printing process takes place in newspaper high-pressure by counter-pressure of the printing and plate cylinders, whereby in the coating area of the printing cylinder there are in practice a wide variety of hardness ratios as well as magnetic and clamping fixtures for the clamping devices for the printing plates.
  • the contact pressure between the printing and plate cylinders has a linear effect across the entire cylinder width and can only be controlled linearly on the right and left sides.
  • a printing plate with a printing cover layer made of a photopolymerizable plastic with a relief height of 0, 50 or 0.54 mm, which is attached by means of a 0.02 mm thick adhesive layer on a 0.24 or 0.25 mm thick metal support can be provided to achieve a uniform linear pressure between the printing plate and the printing substrate supported by an impression cylinder to use a correspondingly soft plastic for the top layer.
  • a soft plastic has the disadvantage, however, that deformations in the structure of the drawing and thus blurred printing can occur during the printing process due to the soft printing surface.
  • EP-A-00 57 593 discloses a printing plate with an intermediate layer consisting of closed or open-pore foam plastic, which is intended to create a compressible flexographic printing plate which makes it possible to compensate for unevenness in the printing material or to print uneven printing materials.
  • a printing plate with a relatively thin, printing cover layer made of a flexible and elastic plastic and an approximately 3 to 10 times thicker intermediate layer made of an elastomer is known.
  • An elastic, multilayer printing form is also known from DE-A-857 055, in which a thin, hard printing layer with an underlying soft, elastic cushion layer and at least one shrink-proof insert is provided, and a compensation layer which counteracts the tendency of the printing form to roll is arranged under the shrink-proof insert.
  • a printing plate is also known from BE-A-437 281, in which the printing areas are formed in a flexible intermediate layer and the intermediate layer is covered with a uniformly thin plastic cover layer.
  • GB-A-997 717 finally also discloses a flexible printing plate in which a relatively thin, printing layer made of a flexible, thermoplastic material is underlaid with a relatively thick intermediate layer made of a likewise flexible material.
  • the object of the invention is to provide a printing plate which enables a compensation of the dynamic forces occurring during the printing process between the printing plate on the plate cylinder and the printing material with the impression cylinder, without thereby questioning the quality of the printout.
  • the flexible intermediate layer provided under the plastic cover layer is able to absorb to a high degree the compressive forces acting perpendicular to the planar extent, which also enables the plastic layer to move more or less strongly in the direction perpendicular to its planar extent, depending on the respective contact pressure to deform and adapt to the conditions of the printing material and the partially necessary drawing structures of the ink-carrying printing surface of the printing plate, without the need to use a particularly soft material for the plastic cover layer. It is advantageous that the relief height of the plastic layer can be kept lower than is the case with printing plates of conventional design. Due to the flexible intermediate layer, it is also possible to provide the carrier layer with a smaller thickness than the conventional designs, without the proper function and durability of the printing plate being called into question.
  • the known printing plate of FIG. 1 has the cover layer 1 made of a photopolymerizable plastic with a thickness or relief height of 0.50 mm, which is connected flatly to the 0.24 mm thick metal carrier layer 3 by means of the 0.02 mm thick adhesive layer 2.
  • the printing plate according to the invention of FIG. 2 has a 0.30 mm thick plastic cover layer 1, a likewise 0.30 mm thick flexible intermediate layer 4 and a 0.14 mm thick metal carrier layer 3, layers 1 and 3 with the intermediate layer 4 are connected by means of two adhesive layers with a total thickness of 0.02 mm, so that, as in FIG. 1, the overall thickness of the printing plate is 0.76 mm.
  • the plastic cover layer of FIG. 2 can, when using exactly the same plastic, in particular exactly the same hardness or softness, compressive stresses in the direction perpendicular to its planar extent due to its substantially smaller thickness and the flexible Adjust the underlay much better than the plastic cover layer of Figure 1.
  • suitable polyolefins in particular polymers of ethylene and / or propylene, such as e.g. Polyethylene (PE) or polypropylene (PP), but also, for example, also photopolymerizable plastics.
  • PE Polyethylene
  • PP polypropylene
  • the elastomers of the intermediate layer are synthetic or natural polymers with rubber-elastic behavior such as, among others.
  • NR natural rubber
  • SBR styprol-butadiene rubber
  • BR polybutadiene
  • IIR polyisoprene
  • IIR ethylene-propylene rubber
  • EPM EPDM
  • NBR acrylate rubber
  • ACM acrylate rubber
  • polyether rubbers thioplastics, silicone rubbers and fluororubbers.
  • elastomers that can be firmly and permanently bonded to the plastic cover layer and, if applicable, the carrier and are not attacked by the printing inks.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Printing Methods (AREA)
EP88114640A 1987-09-09 1988-09-08 Druckplatte, insbesondere für den Zeitungsrotations-Hochdruck Expired - Lifetime EP0306933B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88114640T ATE84750T1 (de) 1987-09-09 1988-09-08 Druckplatte, insbesondere fuer den zeitungsrotations-hochdruck.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3730194 1987-09-09
DE19873730194 DE3730194A1 (de) 1987-09-09 1987-09-09 Druckplatte, insbesondere fuer den zeitungsrotations-hochdruck

Publications (3)

Publication Number Publication Date
EP0306933A2 EP0306933A2 (de) 1989-03-15
EP0306933A3 EP0306933A3 (en) 1989-04-19
EP0306933B1 true EP0306933B1 (de) 1993-01-20

Family

ID=6335566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114640A Expired - Lifetime EP0306933B1 (de) 1987-09-09 1988-09-08 Druckplatte, insbesondere für den Zeitungsrotations-Hochdruck

Country Status (4)

Country Link
EP (1) EP0306933B1 (ja)
JP (1) JPH01105790A (ja)
AT (1) ATE84750T1 (ja)
DE (2) DE3730194A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4324577C1 (de) * 1993-07-22 1994-12-15 Ver Glaswerke Gmbh Druckform für ein Hochdruckverfahren, Verwendung der Druckform zum Bedrucken von Glasoberflächen sowie Verfahren zur Herstellung einer ein Druckraster aufweisenden Druckform für das Flexodruckverfahren
US5578364A (en) * 1995-05-03 1996-11-26 Markem Corporation Gravure plate assembly
DE29801017U1 (de) * 1998-01-23 1998-03-05 MAN Roland Druckmaschinen AG, 63075 Offenbach Beschichtungseinheit für eine Druckmaschine und Hochdruckplatte
DE19804672A1 (de) * 1998-02-06 1999-08-12 Technoplast Beschichtungsgesel Einreißgeschützte Hochdruckform
DE102004053824A1 (de) * 2004-11-04 2006-05-11 Folex Coating Gmbh Druckform für Lacke

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE437281A (ja) *
CH277680A (de) * 1948-04-20 1951-09-15 Semperit Ag Elastische, mehrschichtige Druckform.
US2741297A (en) * 1952-05-09 1956-04-10 Us Rubber Co Printing plate material
NL294984A (ja) * 1962-07-12
EP0057593A3 (en) * 1981-02-02 1983-01-19 Uniroyal, Inc. Compressible photopolymer printing plate
US4582777A (en) * 1983-05-18 1986-04-15 W. R. Grace & Co. Compressible printing plate

Also Published As

Publication number Publication date
ATE84750T1 (de) 1993-02-15
EP0306933A3 (en) 1989-04-19
DE3877666D1 (de) 1993-03-04
EP0306933A2 (de) 1989-03-15
JPH01105790A (ja) 1989-04-24
DE3730194A1 (de) 1989-03-23

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