EP2502753B1 - Blanchet polymère - Google Patents

Blanchet polymère Download PDF

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Publication number
EP2502753B1
EP2502753B1 EP12161175.0A EP12161175A EP2502753B1 EP 2502753 B1 EP2502753 B1 EP 2502753B1 EP 12161175 A EP12161175 A EP 12161175A EP 2502753 B1 EP2502753 B1 EP 2502753B1
Authority
EP
European Patent Office
Prior art keywords
layer
printing
printing blanket
din
blanket
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.)
Active
Application number
EP12161175.0A
Other languages
German (de)
English (en)
Other versions
EP2502753A1 (fr
Inventor
Martin Schleussner
Thomas Dietrich
Michael Jotzo
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 EP12161175.0A priority Critical patent/EP2502753B1/fr
Publication of EP2502753A1 publication Critical patent/EP2502753A1/fr
Application granted granted Critical
Publication of EP2502753B1 publication Critical patent/EP2502753B1/fr
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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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/04—Blanket structure multi-layer
    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/02—Top layers
    • 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/04—Intermediate layers
    • 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/06—Backcoats; Back layers; Bottom layers
    • 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds

Definitions

  • the invention relates to printing plates for printing processes, in particular for offset printing.
  • a printing plate made of metal or plastic is dyed. This printing plate transfers the printed image to a blanket. The printed image is then transferred from the blanket to the substrate.
  • the blanket in the printing unit of an offset printing press, the printing plate and the substrate are clamped on the cylinders so that they roll on each other.
  • Printing blankets or printing forms with dimensionally stable fabric layers, compressible layers or metal substrates are available from various manufacturers in a wide variety of constructions.
  • a printing blanket having a printing layer of polyurethane and a core layer of nickel.
  • Object of the present invention is to provide appropriate blankets for offset printing.
  • a printing blanket comprising at least one printing layer of polyurethane, which is separably connected to at least one rigid layer of polyethylene terephthalate, wherein the blanket has at least one compressible layer which is separably connected to at least one layer of the blanket and made of polyurethane, Polyethylene, polypropylene, polyvinyl chloride, nitrile rubber, butyl rubber, styrene-butadiene rubber, ethylene-propylene-diene rubber, polystyrene, silicone and mixtures.
  • a printing blanket is used in which, unlike the usual blankets, the upper polyurethane printing layer is selected.
  • the materials used according to the invention are characterized, inter alia, by good washability. It is compared to the blanket less force when wiping necessary or with a lower consumption of cleaning agents, a clean surface can be achieved. Often, milder detergents, for example water or water with surfactants, instead of the usual alcohols and cleaning spirits can be used. As there are fewer attacks on the surface during cleaning, the frequency of ghost images is reduced.
  • Ghosting typically results from the irreversible change in the surface of a blanket with changes in chemical-physical and mechanical properties.
  • the structure according to claim 1 allows a separation into the components "substructure” and "printing unit” of the blanket. As a result, additional cost savings are possible because in case of destruction or wear either only the "printing unit” or the "substructure” must be replaced.
  • the quantitative change of the pressure point is not linear over the real raster of 2% to 98%.
  • the relationship is represented in the form of the printing characteristic for the printing machine and the printing press configuration.
  • the inventive, polymeric printing layer significantly reduces the changes in the transfer process.
  • Printing press specific properties can be considered across the layers, layers and components.
  • the change in geometry (technical term “pushing the pressure point") in the transfer steps I. to III. are characterized, among other parameters, by the interaction between the transfer surface of the printing plate and the transfer surface of the printing substrate.
  • the pressure point can be elongated, can be transferred at a fraction or not at a small size, or can have a strange, rugged edge structure.
  • the blanket comprises at least one printing layer of polyurethane separably bonded to at least one rigid layer of polyethylene terephthalate, the blanket having at least one compressible layer releasably bonded to at least one layer of the blanket and made of polyurethane, polyethylene, Polypropylene, polyvinyl chloride, nitrile rubber, butyl rubber, styrene-butadiene rubber, ethylene-propylene-diene rubber, polystyrene, silicone, and mixtures.
  • the printing blanket thus comprises exactly three layers (printing, stiff and compressible layer).
  • additional layers may be in the blanket, in which case the compressible layer is either bonded to the rigid layer or bonded to one of the other layers.
  • the blanket comprises at least one flexible layer releasably bonded to at least one further layer of the blanket, and of polyurethane, polyethylene, polypropylene, polyvinyl chloride, nitrile rubber, butyl rubber, styrene-butadiene rubber, ethylene-propylene-diene rubber , Polystyrene, silicone and mixtures is selected,
  • the blanket has at least one compressible layer which is separable with at least one further layer of the blanket and is selected from polyurethane, polyethylene, polypropylene, polyvinyl chloride, nitrile rubber, ethylene-propylene-diene rubber, silicone and mixtures.
  • a compressible layer is a layer that has cavities and resumes its original shape after deformation.
  • the rebound resilience [DIN53512] is 25 to 60%.
  • At least one rigid layer is present, which is separably connected to at least one further layer of the blanket and consists of polyethylene terephthalate.
  • the modulus of elasticity of the strip layer is 1 to 175 kN / mm 2 .
  • a rigid layer means that it has a modulus of elasticity greater than 1.0 kN / mm 2 .
  • the blanket has at least one fabric layer which is separably connected to at least one further layer of the blanket.
  • Particularly suitable as rigid layers are dimensionally stable films, for example made of PET (modulus of elasticity 1.0 to 5.0 kN / mm 2 ), aluminum (modulus of elasticity 65 to 75 kN / mm 2 ), steel (modulus of elasticity 65 to 75 kN / mm 2 ) , Brass or copper (modulus of elasticity 65 to 165 kN / mm 2 ) or combinations thereof, such as aluminum-PET.
  • the layers, which are separably joined, may be bonded together by pressure-sensitive adhesive or by joint assembly on a printing cylinder.
  • Another embodiment is a blanket comprising in addition a pressure-sensitive adhesive layer or a rigid layer.
  • All of these embodiments may additionally include one or more pressure-sensitive adhesive layers and one or more rigid layers. There may also be one or more layers selected from flexible layers, compressible layers, and fabric layers. These may also additionally have a pressure-sensitive adhesive layer.
  • the invention also provides the use of a printing blanket with the features of the invention as blanket in offset printing.
  • tissue layers are dispensed with.
  • fabric layers are present, they are not required for dimensional stability, but may exist as a soft and flexible layer. In this case, preference is given to using chemically stable fabrics which do not swell or fray.
  • no vulcanized rubber grade is used so that grinding processes can be dispensed with.
  • Thermoplastics such as polyurethane can be applied by calendering or by coating on suitable surfaces. Thin coatings form uniform surfaces with suitable formulations. The realizable surfaces are thus produced selectively and in close tolerances with respect to the total thickness.
  • the printing layer may be aligned with a very smooth, slightly roughened or textured surface.
  • thermoset rubber surfaces used hitherto In contrast to the thermoset rubber surfaces used hitherto, the method according to the invention is faster and more cost-effective, since grinding can be dispensed with.
  • plant-specific modifications are necessary (a targeted improvement in the lower grid area, eg 2% to 40%) it may be necessary to use a flexible or compressible structure, as a component or layer under the printing layer to use.
  • a significant portion of the lower part (cylinder packing) can continue to be used beyond the service life of the polymeric transfer layer and can be permanently adhered or repeatedly clamped to remain on the cylinder.
  • the uppermost component contains at least one layer - the polymeric transfer layer - or in addition several layers of flexible, compressible and rigid materials. At least two packages or mechanically separate layers are required if an otherwise rigid composite with two rigid layers is produced (sandwich or corrugated cardboard effect). It makes sense in these cases to undertake the completion of the entire sequence of layers in the printing press. Again, the layers and layers can be self-adhesive connected to each other or stretched with suitable devices on each other.
  • the printing unit is applied directly, in particular by adhesive, to the printing cylinder. This is done over the entire surface or by partially glued pieces.
  • the upper layer of the component may be a rigid plastic.
  • This plastic may have surface features that make it difficult to damage due to mechanical influences that are easy to clean, allowing for reduced or increased release properties to optimize adhesive properties.
  • the composite obtained thereby is considered as a multi-layered component. Due to the layered assembly an otherwise very rigid composite is guided stress-free around a cylinder in individual cases. Nevertheless, the upper component remains interchangeable, the stable composite is selectively separated. The sticking of the pack with the printing polymer can be partial or full-surface.
  • the invention is illustrated by the following figure.
  • FIG. 1 shows a three-layered construction of a printing blanket with a printing layer 1 made of polyurethane, a separable from the printing layer 1 and arranged underneath a rigid layer 2 of polyethylene terephthalate and a compressible layer 3, which forms the lowermost layer.
  • a backing layer of polyethylene terephthalate (Mylar ® A 350 .mu.m, DuPont) is mixed with a suitable binder system (Henkel Liofol UR 2780 ®), a polyurethane film of thickness 500 microns (Swiss film ® 4250, SwissChem AG) was applied.
  • the polyethylene terephthalate side of this laminate is then reacted with a polyethylene foam having a thickness of 1080 microns (TME ® S 0400, Sekisui Alveo GMBH) glued, this also with a suitable binder system for bonding (Henkel Liofol UR 2780 ®).
  • TME ® S 0400 Sekisui Alveo GMBH
  • the total composite results in a thickness of 1.95 mm.
  • the front-side polyurethane film represents the printing side and serves to transfer the printing ink.

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Claims (11)

  1. Blanchet d'impression pour impression offset, comprenant au moins une couche d'impression en polyuréthane qui est reliée de façon séparable à au moins une couche rigide en polyéthylène téréphtalate, le blanchet d'impression comportant au moins une couche compressible qui est reliée de façon séparable à au moins une couche du blanchet d'impression et, est choisi parmi le polyuréthanne, le polyéthylène, le polypropylène, le polychlorure de vinyle, le caoutchouc nitrile, le caoutchouc butyle, le caoutchouc styrène-butadiène, le caoutchouc éthylène-propylène-diène, le polystyrène, la silicone et leurs mélanges.
  2. Blanchet d'impression selon la revendication 1, dans lequel la couche d'impression présente au moins une des propriétés suivantes :
    - flexibilité/module E [DIN 13316] : de 0,001 à 1,0 kN/mm2, de préférence de 0,1 à 0,5 kN/mm2
    - élasticité de rebondissement [DIN 53512] : de 25 à 55%, de préférence de 35 à 45%
    - énergie de surface, [DIN 8296 A/B] : de 18 à 56 mN/m, de 25 à 40 mN/m
    - dureté Shore (A), [DIN 53505] : de 25 à 95 unité de dureté Shore, de préférence 40 à 70 Shore
    - rugosité [DIN 4762/4768/ISO 4288]:
    - Ra : de 0,0 µm à 2 µm, de préférence de 0,1 µm à 1 µm
    - Rz : de 1,0 µm à 25 µm, de 5 à 15 µm.
  3. Blanchet d'impression selon la revendication 1 ou 2, le blanchet d'impression comportant au moins une couche flexible qui est reliée de manière séparable à au moins une autre couche du blanchet d'impression et est choisi parmi le polyuréthane, le polyéthylène, le polypropylène, le chlorure de polyvinyle, le caoutchouc nitrile, le caoutchouc butyle, le caoutchouc styrène-butadiène, caoutchouc éthylène-propylène-diène, le polystyrène, la silicone, et leurs mélanges.
  4. Blanchet d'impression selon l'une des revendications 1 à 3, dans lequel la couche flexible présentant au moins une des propriétés suivantes impression :
    - flexibilité/module E [DIN 13316] : de 0,001 à 1,0 kN/mm2
    - élasticité de rebondissement [DIN 53512] : 25 à 55%
    - dureté Shore (A), [DIN 53505) : de 25 à 95 unité de dureté shore.
  5. Blanchet d'impression selon l'une des revendications 1 à 4, le blanchet d'impression comportant au moins une couche de tissu qui est reliée de façon séparable à au moins une autre couche du blanchet d'impression.
  6. Blanchet d'impression selon l'une des revendications 1 à 5, dans lequel les couches sont reliées de façon séparable par un adhésif ou par montage commun sur un cylindre d'impression, de préférence deux couches n'étant fixées l'une sur l'autre que par montage commun.
  7. Blanchet d'impression selon l'une au moins des revendications 1 à 6, comprenant précisément
    - une couche d'impression
    - une couche rigide
    - une couche compressible.
  8. Blanchet d'impression selon l'une des revendications 1 à 7, comprenant :
    - une couche d'impression
    - une couche rigide
    - une couche compressible
    - Une couche d'adhésif sensible à la pression.
  9. Blanchet d'impression selon la revendication 8, comprenant en outre :
    - une première couche choisie parmi une couche flexible, une couche compressible ou couche de tissu
    - une seconde couche choisie parmi une couche flexible, une couche compressible ou une couche de tissu.
  10. Utilisation d'un blanchet d'impression selon les revendications 1 à 9 comme un blanchet d'impression pour machines d'impression.
  11. Utilisation selon la revendication 10 comme blanchet d'impression dans l'impression offset.
EP12161175.0A 2011-03-24 2012-03-26 Blanchet polymère Active EP2502753B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12161175.0A EP2502753B1 (fr) 2011-03-24 2012-03-26 Blanchet polymère

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11159610 2011-03-24
EP12161175.0A EP2502753B1 (fr) 2011-03-24 2012-03-26 Blanchet polymère

Publications (2)

Publication Number Publication Date
EP2502753A1 EP2502753A1 (fr) 2012-09-26
EP2502753B1 true EP2502753B1 (fr) 2015-07-01

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011053748A1 (de) * 2011-09-19 2013-03-21 Contitech Elastomer-Beschichtungen Gmbh Mehrschichtiges Flächengebilde zur Verwendung als Drucktuch oder Druckplatte für den Hochdruck, insbesondere den Flexodruck
US9555616B2 (en) 2013-06-11 2017-01-31 Ball Corporation Variable printing process using soft secondary plates and specialty inks
JP6444790B2 (ja) * 2015-03-26 2018-12-26 国立大学法人山形大学 印刷装置及び印刷装置に用いられるブランケット
WO2016168488A1 (fr) * 2015-04-14 2016-10-20 Ball Corporation Procédé d'impression variable utilisant des plaques secondaires flexibles et des encres spéciales
DE102015213057A1 (de) * 2015-07-13 2017-01-19 Contitech Elastomer-Beschichtungen Gmbh Farbübertragungsmedium
ITUB20160940A1 (it) * 2016-02-22 2017-08-22 Trelleborg Coated Systems Italy S P A Telo gommato per un cilindro di stampa di una macchina per stampa
WO2023084547A1 (fr) * 2021-11-12 2023-05-19 Roberto Levi Acobas Revêtement pour un cylindre porte-blanchet d'une machine d'impression

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276947A (en) 1961-04-17 1966-10-04 Us Rubber Co Lithographic printer's blanket and method of making same
US8082842B2 (en) 2006-05-31 2011-12-27 Xerox Corporation Perfluorinated polyether release agent for phase change ink members
US20100307356A1 (en) 2008-02-04 2010-12-09 Felice Rossini Bridged sleeve/cylinder and method of making same for web offset printing machines
US20090193991A1 (en) 2008-02-04 2009-08-06 Felice Rossini Blanket sleeve and cylinder and method of making same

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Publication number Publication date
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