EP2543517A1 - Support conducteur d'électricité pour la pression offset - Google Patents

Support conducteur d'électricité pour la pression offset Download PDF

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Publication number
EP2543517A1
EP2543517A1 EP12175542A EP12175542A EP2543517A1 EP 2543517 A1 EP2543517 A1 EP 2543517A1 EP 12175542 A EP12175542 A EP 12175542A EP 12175542 A EP12175542 A EP 12175542A EP 2543517 A1 EP2543517 A1 EP 2543517A1
Authority
EP
European Patent Office
Prior art keywords
electrically conductive
layer
pad
conductive layer
offset 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.)
Withdrawn
Application number
EP12175542A
Other languages
German (de)
English (en)
Inventor
Martin Dr. Schleussner
Thomas Dr. Dietrich
Michael Jotzo
Björn Dr. Fechner
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.)
Folex Coating GmbH
Original Assignee
Folex Coating 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 Folex Coating GmbH filed Critical Folex Coating GmbH
Priority to EP12175542A priority Critical patent/EP2543517A1/fr
Publication of EP2543517A1 publication Critical patent/EP2543517A1/fr
Withdrawn legal-status Critical Current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
    • B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising

Definitions

  • the present invention relates to an electrically conductive underlay for offset printing and to a method of using this underlay.
  • a printing plate made of metal or plastic is clamped onto a plate cylinder.
  • the printing form is first moistened via rollers and then inked over other rollers.
  • a blanket (blanket) is stretched on a blanket cylinder. Both cylinders roll against each other.
  • the printing form transfers the printed image to the blanket.
  • the blanket cylinder rolls off against a counter-pressure cylinder. Between these two cylinders, the printed image is transferred to the printing material, which is transported by transfer cylinders.
  • the moisture content of the paper can be used to control how much electrostatic the paper charges.
  • a high moisture content of the paper leads to better conductivity, which reduces electrostatics.
  • films are used as printing medium, there are hardly any possibilities of control.
  • Object of the present invention was therefore to avoid the disadvantages mentioned and to improve the process of offset printing.
  • an electrically conductive pad comprising at least one electric conductive layer and a method with the method steps according to claim 13.
  • the simplest embodiment of the pad according to the invention thus comprises a conductive layer which faces the pad, i. it is arranged between the cylinder and the support, for example the blanket.
  • an electrically conductive underlay for offset printing contributes to significantly better dissipation of electrostatic charges on the cylinders and on the printing substrate. As a result, the web guide and the printed image can be improved.
  • Electrically conductive films are used in explosion protection, in antistatic technology, in ESD (Electrostatic Discharge) and EMC (Electromagnetic Compatibility). As a result, electrostatic charges are largely avoided, so that a safe, rapid adhesion-free and clean, i. Dust-free work is possible.
  • the electrically conductive layer has a resistance in the range of 10 1 to 10 12 ohms / square, preferably in the range of 10 3 to 10 11 ohms / square, and more preferably in the range of 10 4 to 10 8 ohms / square to, most preferably in the range of 10 5 to 10 7 ohms / square.
  • the electrically conductive layer has a resistance in the range of 10 1 to 10 6 ohms / square, preferably in the range of 10 3 to 10 5 ohms / square.
  • the electrically conductive layer has a resistance in the range of 10 6 to 10 11 ohms / square, preferably in the range of 10 7 to 10 9 ohms / square.
  • the electrically conductive layer preferably has electrically conductive substances.
  • the electrically conductive layer can be produced by using conductive organic polymers.
  • EP 1 215 041 A1 and EP 0 981 449 A1 describe solutions for the achievement of conductive surfaces on plastic films.
  • Conductive carbon blacks, graphite and nanotubes as well as other conductive carbon compounds or metals, incorporated into paints or plastics, can also be used in order to achieve an electrically conductive surface.
  • Suitable inorganic pigments which lead to a conductivity are ceramic oxides of metals of subgroups V and VI, in particular ITO (indium tin oxide) and IWO (indium tungsten oxide). Also suitable are metal-doped metal oxides, for example Ga, Sn, As-doped metal oxides such as antimony-doped tin oxides. Coated mica coated therewith is available as a commercial product, for example from Merck, Darmstadt. It is also possible to combine several pigments in the composition.
  • the electrically conductive layer or base comprises at least one carrier layer.
  • the carrier layer is a plastic film, which is coated with the electrically conductive layer, so that, for example, a two-layer structure is present.
  • the electrically conductive layer can be prepared by antistatic coating with quaternary ammonium salts or ITO vapor deposition.
  • Suitable films consist of polyethylene, polypropylene, polyesters such as polyethylene terephthalate or polyethylene naphthalate, polyurethane, polymethyl methacrylate, polyvinyl chloride, polycarbonate or copolymers, or of mixtures thereof.
  • inventive electrically conductive Layer on aluminum, stainless steel, brass or fabric or mixtures thereof or mixtures with plastic films as a carrier layer can be applied.
  • the electrically conductive pad may preferably comprise at least one, more preferably two, more preferably a plurality of compressible, foamed layers.
  • a possible structure thus consists of an electrically conductive layer which is applied to a compressible, foamed layer.
  • Another possible construction is a three-layered construction consisting of a compressible layer, a carrier layer arranged thereon and an electrically conductive layer which forms the uppermost layer.
  • Suitable materials for compressible, foamed layers are in particular polyurethanes, polyethylenes and polypropylenes, nitrile-butyl rubber, chloroprene, ethylene-propylene-diene rubber and silicones or mixtures of these materials.
  • suitable standard weights are between 110 and 400 kg / m 3 , for polypropylene at 80 to 340 kg / m 3 , for silicones at 80 to 560 kg / m 3 and for nitrile-butyl rubber at 280 up to 900 kg / m 3 .
  • the compressible, foamed layers of different polymers are different polymers, depending on the desired pad.
  • both foamed layers consist of the same material or polymer.
  • the foamed layer may be closed-cell or open-celled.
  • the foamed layer may be mixed-celled, i. that it has both closed-cell and open-cell foams.
  • the pad comprises at least one flexible layer.
  • Suitable flexible layers are in particular polyurethanes, polyvinyl chlorides, silicones, silicone gels, nitrile-butyl rubber, styrene-butadiene rubber or mixtures thereof.
  • a possible construction of the underlay according to the invention consists of a flexible layer, a carrier layer arranged thereon and an electrically conductive layer which forms the uppermost layer.
  • a four-layer structure is possible.
  • it can consist of a compressible layer which forms the lowermost layer, a flexible layer arranged thereon, a carrier layer and an electrically conductive layer which forms the uppermost layer.
  • Another embodiment may consist of a first electrically conductive layer which forms the uppermost layer, a carrier layer arranged therebelow, a flexible layer and a second electrically conductive layer which forms the lowermost layer.
  • the pad comprises at least one adhesive layer. This is useful for many applications, since the pad can then be firmly attached to the cylinder.
  • the underlay according to the invention consists of an electrically conductive layer, a carrier layer arranged thereunder and the adhesive layer.
  • the pad consists of an electrically conductive layer, a first carrier layer arranged thereunder, an adhesive layer and a second carrier layer, which forms the lowermost layer.
  • such a construction may also comprise a second adhesive layer, which then forms the lowermost layer, so that a five-layered structure is present.
  • Another exemplary embodiment of a five-layered construction consists of an electrically conductive layer, a carrier layer arranged therebelow, a flexible layer, a compressible layer and an adhesive layer which forms the lowermost layer.
  • the adhesive layer is disposed on the underside of the pad so that the pad may be self-adhered to a cylinder of an offset printing press.
  • the respective layers ie the electrically conductive, the carrier layer, the compressible, foamed layer and the flexible layer are preferably glued together with an adhesive adhesive and / or a bonding agent.
  • pressure-sensitive adhesive layers for laminating the layers may be present.
  • the electroconductive layer of the present invention can be prepared by dispersing inorganic pigments together with insoluble fillers in UV or thermosetting paints.
  • the coating of the plastic film can be carried out by application by wire bar, kiss coating / reverse-roll or screen printing and subsequent curing. It is also possible to incorporate the electrically conductive particles or polymers in plastics, for example by extrusion. Combinations of the above types of coating are also possible.
  • the thickness of the electrically conductive layer according to the invention is in the range from 1 to 100 .mu.m, preferably from 4 to 40 .mu.m, particularly preferably from 8 to 30 .mu.m.
  • the thickness of the backing of the invention is in the range of 1 to 4000 microns.
  • the backing of the invention comprises multiple layers, i. at least two, preferably three, more preferably four, most preferably five, so the conductive layer always forms the outside (starting from the cylinder) of the pad.
  • the electrically conductive layer has a contacting, for example by gluing a copper or silver foil or by plotting a conductive tails.
  • the invention also provides a method for mounting a blanket in offset printing comprising the steps of: a) mounting an electrically conductive pad on a blanket cylinder, and b) mounting a blanket on the electrically conductive pad.
  • a blanket may be placed in a first step on an electrically conductive pad to obtain a pad blanket combination, which is mounted in a further step on a rubber blanket cylinder.
  • the pad according to the invention is fixed to the cylinder with the adhesive layer.
  • the invention relates to a use of the electrically conductive substrate according to the invention in offset printing.
  • the pad according to the invention is preferably used as a pad for a blanket cylinder and a transfer cylinder.
  • the blanket cylinder assembly between the blanket and the roller (cylinder) takes place; on the transfer cylinder between the anti-marking film (a color-repellent cloth) and the roller (cylinder).
  • the transfer cylinder between the anti-marking film (a color-repellent cloth) and the roller (cylinder).
  • it can also be used on a printing plate cylinder, a paint cylinder and a counter-pressure cylinder to reduce electrostatic charge.
  • sheet guide plates, guide plates and the feed table of the offset printing press can be equipped with such an electrically conductive base.
  • the carrier layer which is connected to the electrically conductive layer can be a single layer or, for example, also be laminated to a compressible, foamed layer. It can consist of several layers. It may be arranged individually or as a laminate or of several individual layers in the substrate. The sum of these individual layers has a nominal thickness of 5-1000 ⁇ m, preferably 10-700 ⁇ m, more preferably 20-540 ⁇ m.
  • Compressible, foamed layers have nominal thicknesses of 20-1500 ⁇ m, preferably 20-600 ⁇ m, particularly preferably 20-450 ⁇ m. It is also possible to use two or more individual compressible, foamed layers which are laminated. The compressible, foamed layers can also be distributed in the base, for example, such that a compressible, foamed layer is arranged at the bottom, the second, however, in the middle of the backing film. Regardless of the arrangement of the foamed layers, the sum of their individual nominal thicknesses is 20-1500 ⁇ m, preferably 20-600 ⁇ m, particularly preferably 20-450 ⁇ m.
  • Flexible layers have nominal thicknesses of 100-1100 ⁇ m, preferably 100-600 ⁇ m, particularly preferably 150-500 ⁇ m. It is also possible to use two or more individual flexible layers which are laminated. The flexible layers can also be distributed in the base. Regardless of the arrangement of the flexible layers, the sum of the nominal thicknesses is then 100-1100 .mu.m, preferably 100-600 .mu.m, particularly preferably 150-500 .mu.m.
  • FIG. 1 is a typical construction of a printing unit (10), consisting of an impression cylinder (12), a blanket cylinder (14) with a blanket (16), a printing plate cylinder (18) with an electrically conductive pad (20) and a pressure plate (22) arranged thereon, a dampening roller (25) and some ink rollers (24). Since the invention relates primarily to the pad, the printing unit will not be described in detail at this point.
  • FIGS. 2 to 10 show nineantssbe admir the pad (20) according to the invention, for example, in a printing unit (10), as shown in FIG. 1 shown is used.
  • FIG. 2 shows a structure consisting of a carrier layer (28) and an electrically conductive layer (26) arranged thereon.
  • FIG. 3 shows a structure consisting of a carrier layer (28), an electrically conductive layer (26) arranged thereon and an adhesive layer (30) arranged under the carrier layer (28).
  • FIG. 4 shows a further three-layer structure, consisting of a carrier layer (28), an electrically conductive layer (26) arranged thereon and a compressible layer (32) which forms the lowermost layer.
  • FIG. 5 shows a flexible layer (34) followed by a carrier layer (28) and an electrically conductive layer (26) disposed thereon.
  • FIG. 6 shows a four-layered construction with a first and a second carrier layer (28 '), (28 "), which are respectively arranged above and below an adhesive layer (30) and an electrically conductive layer (26), which on the first carrier layer (28 ') is arranged.
  • FIG. 7 a five-layered structure is shown, consisting of an electrically conductive layer (26) which forms the uppermost layer, a first carrier layer (28 ') arranged thereunder, a first adhesive layer (30') arranged underneath, a second carrier layer (28 ") and a second adhesive layer (30") which forms the lowermost layer.
  • FIG. 8 shows a structure consisting of a compressible layer (32), a flexible layer (34), a carrier layer (28) and, the top layer forming, electrically conductive layer (26).
  • FIG. 9 is another example of a five-layer structure consisting of an adhesive layer (30), a compressible layer (32), a flexible layer (34), a carrier layer (28) and an electrically conductive layer (26) arranged thereon.
  • FIG. 10 shows a sandwich construction of a substrate with a first electrically conductive layer (26 ') and a second electrically conductive layer (26 "), which respectively form the top and the bottom layer, and a carrier layer (28) or a flexible layer ( 34) disposed between the two electrically conductive layers (26 '), (26 ").

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  • Laminated Bodies (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP12175542A 2011-07-07 2012-07-09 Support conducteur d'électricité pour la pression offset Withdrawn EP2543517A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12175542A EP2543517A1 (fr) 2011-07-07 2012-07-09 Support conducteur d'électricité pour la pression offset

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11173098 2011-07-07
EP12175542A EP2543517A1 (fr) 2011-07-07 2012-07-09 Support conducteur d'électricité pour la pression offset

Publications (1)

Publication Number Publication Date
EP2543517A1 true EP2543517A1 (fr) 2013-01-09

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ID=46397113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12175542A Withdrawn EP2543517A1 (fr) 2011-07-07 2012-07-09 Support conducteur d'électricité pour la pression offset

Country Status (1)

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EP (1) EP2543517A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103214802A (zh) * 2013-04-19 2013-07-24 北京中纺优丝特种纤维科技有限公司 一种聚酯纤维导电母粒预分散体及其制备方法
CN108162520A (zh) * 2017-12-22 2018-06-15 天津润成橡胶制品股份有限公司 一种防静电橡胶板及其制备方法

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235772A (en) * 1961-08-08 1966-02-15 Gurin Emanuel Anti-static printer's blanket in combination with grounded metal roller
EP0121935A2 (fr) * 1983-04-11 1984-10-17 Fuji Photo Film Co., Ltd. Matériau pour plaque d'impression électrophotographique
EP0149036A2 (fr) * 1984-01-17 1985-07-24 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Cylindre porte-blanchet pour machine rotative d'impression offset
EP0981449A1 (fr) 1997-05-03 2000-03-01 Technoplast Beschichtungsgesellschaft MBH Bandes imprimees conductrices en matiere plastique
US6393985B1 (en) * 1998-12-28 2002-05-28 Fuji Photo Co., Ltd. Direct drawing type lithographic printing plate precursor
EP1215041A1 (fr) 2000-12-16 2002-06-19 technoplast Beschichtungsgesellschaft mbH Surfaces conducteurs résistant à l'abrasion et imprimables
EP1239328A2 (fr) * 2001-03-06 2002-09-11 Agfa-Gevaert Matériau d'enregistrement photosensible avec revêtement électroconducteur sur la face arrière
EP1470915A1 (fr) * 2003-04-23 2004-10-27 Konica Minolta Medical & Graphic, Inc. Procédé pour préparer une plaque d'impression et plaque d'impression
EP1514681A1 (fr) * 2003-09-11 2005-03-16 Konica Minolta Medical & Graphic, Inc. Produit pour plaque d'impression en forme de rouleau du type développement sur presse
EP1561597A2 (fr) * 2004-02-06 2005-08-10 Konica Minolta Medical & Graphic, Inc. Matériau pour une plaque d'impression planographique, plaque d'impression planographique et procédé d'impression
EP1630609A1 (fr) * 2004-08-23 2006-03-01 Konica Minolta Medical & Graphic, Inc. Matériau pour plaque d'impression et plaque d'impression
DE102009051444A1 (de) * 2009-10-30 2011-05-05 Weros Technology Gmbh Druckverfahren und Druckmaschine
EP2361784A1 (fr) * 2010-02-22 2011-08-31 ContiTech Elastomer-Beschichtungen GmbH Blanchet

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235772A (en) * 1961-08-08 1966-02-15 Gurin Emanuel Anti-static printer's blanket in combination with grounded metal roller
EP0121935A2 (fr) * 1983-04-11 1984-10-17 Fuji Photo Film Co., Ltd. Matériau pour plaque d'impression électrophotographique
EP0149036A2 (fr) * 1984-01-17 1985-07-24 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Cylindre porte-blanchet pour machine rotative d'impression offset
EP0981449A1 (fr) 1997-05-03 2000-03-01 Technoplast Beschichtungsgesellschaft MBH Bandes imprimees conductrices en matiere plastique
US6393985B1 (en) * 1998-12-28 2002-05-28 Fuji Photo Co., Ltd. Direct drawing type lithographic printing plate precursor
EP1215041A1 (fr) 2000-12-16 2002-06-19 technoplast Beschichtungsgesellschaft mbH Surfaces conducteurs résistant à l'abrasion et imprimables
EP1239328A2 (fr) * 2001-03-06 2002-09-11 Agfa-Gevaert Matériau d'enregistrement photosensible avec revêtement électroconducteur sur la face arrière
EP1470915A1 (fr) * 2003-04-23 2004-10-27 Konica Minolta Medical & Graphic, Inc. Procédé pour préparer une plaque d'impression et plaque d'impression
EP1514681A1 (fr) * 2003-09-11 2005-03-16 Konica Minolta Medical & Graphic, Inc. Produit pour plaque d'impression en forme de rouleau du type développement sur presse
EP1561597A2 (fr) * 2004-02-06 2005-08-10 Konica Minolta Medical & Graphic, Inc. Matériau pour une plaque d'impression planographique, plaque d'impression planographique et procédé d'impression
EP1630609A1 (fr) * 2004-08-23 2006-03-01 Konica Minolta Medical & Graphic, Inc. Matériau pour plaque d'impression et plaque d'impression
DE102009051444A1 (de) * 2009-10-30 2011-05-05 Weros Technology Gmbh Druckverfahren und Druckmaschine
EP2361784A1 (fr) * 2010-02-22 2011-08-31 ContiTech Elastomer-Beschichtungen GmbH Blanchet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103214802A (zh) * 2013-04-19 2013-07-24 北京中纺优丝特种纤维科技有限公司 一种聚酯纤维导电母粒预分散体及其制备方法
CN103214802B (zh) * 2013-04-19 2016-02-17 北京中纺优丝特种纤维科技有限公司 一种聚酯纤维导电母粒预分散体及其制备方法
CN108162520A (zh) * 2017-12-22 2018-06-15 天津润成橡胶制品股份有限公司 一种防静电橡胶板及其制备方法
CN108162520B (zh) * 2017-12-22 2019-09-24 天津润成橡胶制品股份有限公司 一种防静电橡胶板及其制备方法

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