EP2517891A1 - Support de base compressible pour le bloc d'impression dans la l'impression offset - Google Patents

Support de base compressible pour le bloc d'impression dans la l'impression offset Download PDF

Info

Publication number
EP2517891A1
EP2517891A1 EP11163728A EP11163728A EP2517891A1 EP 2517891 A1 EP2517891 A1 EP 2517891A1 EP 11163728 A EP11163728 A EP 11163728A EP 11163728 A EP11163728 A EP 11163728A EP 2517891 A1 EP2517891 A1 EP 2517891A1
Authority
EP
European Patent Office
Prior art keywords
pad
layer
printing
foamed
printing plate
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Withdrawn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
EP11163728A
Other languages
German (de)
English (en)
Inventor
Dr. Martin Schleussner
Michael Jotzo
Dr. Thomas Dietrich
Dr. Björn 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 EP11163728A priority Critical patent/EP2517891A1/fr
Publication of EP2517891A1 publication Critical patent/EP2517891A1/fr
Withdrawn legal-status Critical Current

Links

Images

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 a pad for offset printing and a method of using the pad.
  • 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 printing plate (printing plate) on a plate cylinder and 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 substrate.
  • Both under the printing form and under the blanket documents are usually used, which allow adjustment of a defined cylinder diameter.
  • These documents can be formed from paper sheets and polymeric materials. While paper sheets are susceptible to swelling and compression, plastic substrates that are used today, for example made of polyester or polyvinyl chloride, are characterized by a very hard structure.
  • All cylinders used are usually not solid cylinders, but have over the cylinder length a recess, also called channel.
  • a recess also called channel.
  • devices for fixing printing form and blanket are devices for fixing printing form and blanket.
  • pressure changes between the rollers and cylinders of the system occur during unrolling.
  • unwanted stripes can arise in the printed image.
  • Object of the present invention was therefore to improve the disadvantages mentioned and thus the method of offset printing.
  • Such a backing under the printing form i. that it is arranged between printing plate and printing plate cylinder, on the one hand reduces the banding, so that an improved printing result is achieved, further the service life of the printing plate is significantly improved, which leads to an increase in the number of rollovers.
  • the foamed layer has a density in the range from 80 kg / m 3 to 1200 kg / m 3 , preferably 100 to 1000 kg / m 3 , particularly preferably 250 to 600 kg / m 3 .
  • the foamed layer may comprise polyurethane, polyethylene, polypropylene, nitrile-butyl rubber, chloroprene rubber, ethylene-propylene-diene rubber and / or silicone, or mixtures thereof.
  • a preferred mixture may include, for example, polyurethane, polyester and polyether. More preferably, the foamed layer is at least 50 % By weight of polyurethane, more preferably 60% or more by weight, most preferably 80% or more by weight of one of said materials or mixtures thereof.
  • the foamed layer preferably has a porosity of at least 50%, preferably 60%, more preferably 70%, most preferably 80%.
  • suitable densities 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 backing according to the invention preferably has at least one dimensionally stable layer.
  • a pad comprising at least two layers, namely the foamed layer and the dimensionally stable layer, has an increased mechanical stability. Furthermore, the foam layer is protected against heavy loads.
  • the dimensionally stable layer may consist of polyester, polycarbonate, polymethyl methacrylate, polyethylene, polypropylene, polyvinyl chloride, in particular hard PVC, aluminum, stainless steel, brass and / or fabric or of mixtures thereof.
  • the pad has at least one flexible layer, so that the pad then comprises at least three layers, namely the foamed layer, the dimensionally stable layer and the flexible layer.
  • a possible arrangement of the layers starting from the surface of the cylinder may be the following: a foamed layer, followed by a dimensionally stable layer, followed by a flexible layer.
  • the above arrangements may have yet another dimensionally stable layer, so as to obtain an at least four-layer pad.
  • both dimensionally stable layers then consist of different materials or polymers.
  • a further construction according to the invention comprises the arrangement: flexible layer, followed by a foamed layer and two dimensionally stable layers which are different in each case based on the material or the polymer of which they are made.
  • five-layered arrangement wherein five-layered preferably refers to the following layers: foamed layer, followed by a dimensionally stable layer, followed by a flexible layer, followed by another dimensionally stable layer and another, the uppermost forming flexible layer.
  • the flexible layer of polyurethane, polyvinyl chloride, silicone, silicone gel, nitrile-butyl rubber and / or styrene-butadiene rubber or mixtures thereof is preferred.
  • Flexible layers have elastic moduli in the range of 1 MPa to 1,000 MPa.
  • the modulus of elasticity is measured according to DIN ISO 527-1.
  • the elastic modulus is preferably in the range from 10 MPa to 800 MPa, particularly preferably in the range from 50 to 100 MPa.
  • the compressible pad preferably has a total thickness in the range of 0.02 to 2.5 mm, preferably 0.02 to 1.2 mm, particularly preferably 0.04 to 0.8 mm.
  • the pad comprises two or more foamed layers. These can, depending on the desired backing, each consist of different materials or polymers. Also a structure is possible, wherein 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 backing according to the invention preferably comprises an adhesive layer, for example an adhesive.
  • the adhesive layer may be present between the foamed, flexible and dimensionally stable layers.
  • the adhesive layer also comprises adhesive layers or pressure-sensitive adhesive layers for laminating the respective layers.
  • the adhesive layer is arranged on the underside of the base so that the base can be adhesively secured to the plate cylinder.
  • the invention also provides a method for mounting a printing form in offset printing, comprising the steps of: a) mounting a base and b) mounting a printing forme on this base.
  • a printing form can also be arranged on a base in a first step in order to obtain a base printing form, which is mounted on a printing plate cylinder in a further step.
  • the pad of the invention is mounted on the plate cylinder, then the printing plate is mounted resting on the pad.
  • the pad can be previously laminated with the pressure plate, so that this product can be mounted directly on the plate cylinder.
  • the pad with the adhesive layer is fixed to the printing plate cylinder.
  • 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.
  • the dimensionally stable layer may be a single layer laminated, for example, to a compressible, foamed layer, but it may also consist of several layers. It may be arranged individually or as a laminate of several individual layers in the middle of the substrate. Individual dimensionally stable layers can also be distributed in the base, so that there are flexible or compressible layers between them.
  • the sum of the individual dimensionally stable layers has a nominal thickness of 5-1000 ⁇ m, preferably 10-700 ⁇ m, more preferably 20-540 ⁇ m.
  • the layer structure of the dimensionally stable layer is an arrangement in which two dimensionally stable layers, namely a lower and an upper are used, which are located in the middle of the backing sheet.
  • These two dimensionally stable layers are laminated and can have the following thickness profiles: the lower layer has a thickness profile of 20-500 .mu.m, preferably 20-350 .mu.m, particularly preferably 50-190 .mu.m, the upper layer has a thickness profile of 50-500 .mu.m, preferably 50-350 ⁇ m, more preferably 100-350 ⁇ 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 may also be distributed in the base, for example such that one flexible layer is on top, while the second is in the middle of the base film. 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 consisting of an impression cylinder 30, a blanket cylinder 32 with a blanket 33, a printing plate cylinder 34 with a compressible pad 10 and a pressure plate arranged thereon 36, a fountain roller 38 and some ink rollers 40 shown. Since the invention relates primarily to the documents, the printing unit will not be described in detail at this point.
  • FIGS. 2a to 2d show four embodiments of the pad 10 according to the invention, for example, in a printing unit, as shown in FIG. 1 shown is used.
  • FIG. 2a shows a construction consisting of a compressible, foamed layer 12 and two differently thick, dimensionally stable laminated layers 14 and 16, wherein the layer 16 forms the top layer.
  • FIG. 2b shows a four-layered structure of a pad 10 ", which consists of a compressible, foamed layer 12, two dimensionally stable layers 18 and 20 and of a flexible layer 22, which forms the uppermost layer.
  • Both dimensionally stable layers 18 and 20 are laminated and have the following thickness profiles:
  • the dimensionally stable layer 18 has a thickness profile of 20 to 500 .mu.m, preferably 20 to 350 .mu.m, particularly preferably 50 to 190 .mu.m.
  • the layer 20 has a thickness profile of 50 to 500 .mu.m, preferably 50 to 350 .mu.m, particularly preferably 100 to 350 .mu.m.
  • Figure 2c shows a four-layer structure of a pad 10 '''according to the invention, which consists of a flexible layer 22, a compressible, foamed layer 12 and two dimensionally stable layers 18 and 20.
  • Figure 2d shows a five-layer structure of a pad 10 '''' according to the invention, which consists of a compressible, foamed layer 12, a dimensionally stable layer 18, a flexible layer 24, another dimensionally stable layer 20 and another flexible layer 26.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
EP11163728A 2011-04-26 2011-04-26 Support de base compressible pour le bloc d'impression dans la l'impression offset Withdrawn EP2517891A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11163728A EP2517891A1 (fr) 2011-04-26 2011-04-26 Support de base compressible pour le bloc d'impression dans la l'impression offset

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11163728A EP2517891A1 (fr) 2011-04-26 2011-04-26 Support de base compressible pour le bloc d'impression dans la l'impression offset

Publications (1)

Publication Number Publication Date
EP2517891A1 true EP2517891A1 (fr) 2012-10-31

Family

ID=44511742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11163728A Withdrawn EP2517891A1 (fr) 2011-04-26 2011-04-26 Support de base compressible pour le bloc d'impression dans la l'impression offset

Country Status (1)

Country Link
EP (1) EP2517891A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001026907A1 (fr) * 1999-10-13 2001-04-19 Hatec Produktions- Und Handelsgesellschaft Mbh Support pour dispositif d'impression et fardage destines a l'impression de materiaux a imprimer non planes
WO2003057497A1 (fr) * 2002-01-08 2003-07-17 Tesa Ag Bandes adhesives destinees a coller des plaques d'impression
EP2070717A1 (fr) * 2007-12-10 2009-06-17 Folex Coating GmbH Support compressible sous blanchet de caoutchouc en impression offset
EP2116584A1 (fr) * 2008-05-09 2009-11-11 Tesa AG Bandes adhésives destinées au collage de plaques de pression

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001026907A1 (fr) * 1999-10-13 2001-04-19 Hatec Produktions- Und Handelsgesellschaft Mbh Support pour dispositif d'impression et fardage destines a l'impression de materiaux a imprimer non planes
WO2003057497A1 (fr) * 2002-01-08 2003-07-17 Tesa Ag Bandes adhesives destinees a coller des plaques d'impression
EP2070717A1 (fr) * 2007-12-10 2009-06-17 Folex Coating GmbH Support compressible sous blanchet de caoutchouc en impression offset
EP2116584A1 (fr) * 2008-05-09 2009-11-11 Tesa AG Bandes adhésives destinées au collage de plaques de pression

Similar Documents

Publication Publication Date Title
DE69230944T2 (de) Komprimierbares drucktuch und verfahren zur herstellung
EP2421713A1 (fr) Produit plat multicouche présentant la forme d'un blanchet ou d'une plaque d'impression pour impression par flexographie ou typographie et doté d'une gravure laser
EP1560717B1 (fr) Blanchet d'imprimerie et procede permettant de reduire la corrosion et l'abrasion de blanchets d'imprimerie et de cylindres porte-blanchets
EP2502753B1 (fr) Blanchet polymère
EP0491253B1 (fr) Feuille de montage
DE2244765C3 (de) Drucktuch
EP2070717B1 (fr) Procédé de montage d'un blanchet de caoutchouc en impression offset
US6019042A (en) Printing blanket for offset printing
WO2007115642A2 (fr) Dispositif à film d'impression
EP1230095B1 (fr) Support pour dispositif d'impression et fardage destines a l'impression de materiaux a imprimer non planes
DE602004001574T2 (de) Unterlage für einen Gummituch-bzw. Druckzylinder in Druckerpressen
EP2517891A1 (fr) Support de base compressible pour le bloc d'impression dans la l'impression offset
DE102008047096A1 (de) Drucktuch für ein Kaltfolientransferverfahren
EP1227937B1 (fr) Groupe d'impression et methode destines a l'impression de carton ondule
EP1208997B1 (fr) couverture pour l'impression offset
EP0739731B1 (fr) Dispositif d'impression pour réaliser des perforations et/ou des découpages pour des machines d'impression de feuilles offset
EP2543517A1 (fr) Support conducteur d'électricité pour la pression offset
EP1551631A2 (fr) Raclette notamment destinee a la serigraphie
DE102015112206A1 (de) Montageklebeband und Verwendung des Montageklebebandes für die Druckindustrie
EP1390202B1 (fr) Procede de production d'une plaque d'impression pouvant etre directement gravee au laser, et plaque d'impression produite selon ledit procede
DE20014158U1 (de) Unterbaumaterial für Offset-Druckmaschinen
EP1332871B1 (fr) Plaque d'impression composée de plusieurs couches séparables
EP2692538B1 (fr) Feuille intérmediaire pour un blanchet métallique pour l'impression
DE20305146U1 (de) Druckwerk für den Offset- der Flexodruck mit einem auf dem Drucktuchzylinder aufgespannten Drucktuch und Drucktuch für das Druckwerk
DE102015102906B4 (de) Druckvorrichtung für Hochdruck und Tiefdruck

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20130503