EP2692538B1 - Feuille intérmediaire pour un blanchet métallique pour l'impression - Google Patents

Feuille intérmediaire pour un blanchet métallique pour l'impression Download PDF

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Publication number
EP2692538B1
EP2692538B1 EP12178440.9A EP12178440A EP2692538B1 EP 2692538 B1 EP2692538 B1 EP 2692538B1 EP 12178440 A EP12178440 A EP 12178440A EP 2692538 B1 EP2692538 B1 EP 2692538B1
Authority
EP
European Patent Office
Prior art keywords
layer
metal
film
underlay film
film according
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.)
Not-in-force
Application number
EP12178440.9A
Other languages
German (de)
English (en)
Other versions
EP2692538A1 (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 EP12178440.9A priority Critical patent/EP2692538B1/fr
Publication of EP2692538A1 publication Critical patent/EP2692538A1/fr
Application granted granted Critical
Publication of EP2692538B1 publication Critical patent/EP2692538B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B41N2210/10—Location or type of the layers in multi-layer blankets or like coverings characterised by inorganic compounds, e.g. pigments
    • 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 present invention relates to a backing sheet for a metal blanket, a metal blanket and the use of the backing sheet.
  • Offset printing presses consist of a system of solid cylinders, which provide for a pinpoint transfer of the print image from the printing plate on a rubber blanket cylinder on the substrate and must have an extremely high degree of accuracy. The latter is also required by the consumables used on these cylinders. Smallest inaccuracies can quickly lead to an imbalance at very high speeds or lead to faster wear over the height of several million settlements against each other.
  • blanket plates In order to reduce the imbalance of a blanket cylinder to a minimum, blanket plates have been developed, which guarantee the blanket surface maximum rest and in which the blanket plates are introduced by means of folding in a very narrow clamping range.
  • the protective films have so far usually consisted of a polyester film with thermal bonding. The films are first cut to size and then applied with the introduction of high temperatures. In the process, the films shrink, change their thickness spectrum and can not ensure complete underlaying of the blanket plate. Larger films can not be used as they would not fit between the base surface defined by the fold of the two clamping straps.
  • a heat-sealable film which is laminated to the metal side of the metal blanket by heat and pressure.
  • Such heat-sealable film composites which are usually made of polyester and a thermoplastic polyurethane, have high heat shrinkage values.
  • Laminates consisting of a polyethylene terephthalate film (PET) and a thermoplastic polyurethane film (TPU) were tempered at 130 ° C. for 30 minutes and shrinkage values of 1.0 to 1.8% were found. These are unacceptable values when it comes to providing dimensionally stable film composites.
  • EP 2 070 717 describes a blanket for a blanket for offset printing comprising at least one foamed layer.
  • EP 2 106 925 discloses a backing sheet for offset printing comprising at least one self-adherent polymer film.
  • JP A 52-135386 describes a laminated material that serves as a meat wrapper.
  • PSA adhesive Pressure Sensitive Adhesive
  • PET films can be easily glued to the underside of metal blankets.
  • PSA adhesive Pressure Sensitive Adhesive
  • they are not dimensionally stable in the same way and show high shrinkage values of 0.8 to 1.8%.
  • PSA adhesive are not resistant enough to solvents and cleaning fluids that are used in the printing industry, on the other they quickly lose the adhesion at temperatures of 50 ° C and higher temperatures, as they do not are more shear stable.
  • the heat-sealable thermoplastic material must adhere well to the carrier layer and must not tear, shed or infiltrated with water or solvents throughout the life of the blanket.
  • a heat-sealable film laminate is desired, which has a shrinkage of 0% if possible and in which the layers are virtually inseparably connected.
  • the object of the present invention is to provide a backing film which overcomes at least some of the disadvantages of the prior art.
  • the dimensionally stable carrier layer contributes significantly to increasing the quality of the backing film.
  • a layer whose shrinkage in TD (transverse direction), ie transversely to the running direction and in MD (machine direction), ie in the direction of the running direction of the film web, measured at 130 ° C. for 30 minutes does not have a dimensional stability of 0.5% exceeds.
  • the film is measured, the temperature for 30 min at 130 ° C, cooled again to room temperature and measured the width and length changes. At a width of 100 cm, the width after treatment must be at least 99.5 cm. The same very small shrinkage change is also observed in the thickness of the film; however, this is more difficult to measure due to the smaller thickness.
  • the scale support layer is selected from aluminum or polyamide.
  • thermoplastic polyurethane As a heat-sealable polymer is suitable polyurethane.
  • FIG. 1 shows a laminate according to the invention, in which a thermoplastic polyurethane is bonded to an aluminum layer.
  • This laminate after FIG. 1 For example, it is bonded to the underside of a metal blanket at 120 ° C and pressures of 5 to 10 bar.
  • the TPU serves as an adhesive, such that it develops heat-sealable properties under heat and adheres to the surface of the metal blanket due to its lowered viscosity. After cooling, a virtually inseparable composite has formed.
  • FIG. 2 shows a laminate consisting of polyamide film and thermoplastic polyurethane.
  • the polyamide film is the carrier.
  • this laminate is also attached to a metal blanket under heat and pressure.
  • a laminate according to FIG. 1 shows a measured shrinkage of 0%.
  • a laminate after FIG. 2 shows a shrinkage of less than 0.5% under the same conditions.
  • Foil laminates as per FIG. 1 and FIG. 2 serve very well to provide dimensionally stable film composites that ensure a complete under construction of the blanket plate even after thermal application. A shrinkage of less than 0.5% can still be accepted when it comes to ensuring only the smallest differences in thickness in the resulting composite with the metal blanket.
  • the laminates of aluminum and TPU or polyamide and TPU are easy to cut. It creates clean edges and no brittle edge breaks as in the use of polyester.
  • the provided film composites are stable against temperatures of 130 ° C and influences of solvents and cleaners used in the printing process.
  • composites made of aluminum foil and TPU or polyamide and TPU show the highest bond adhesion values.
  • the TPU is preferred.
  • the carrier film can be laminated with other film layers that provide functionality.
  • PET can be used to install a protective layer between the metal blanket and aluminum of the heat-sealable film and the steel cylinder of the press.
  • the thickness of the film composite can be increased and precisely adjusted via the PET layer.
  • the PET in the heat of hot lamination, the PET may tend to have a higher shrinkage, but it is kept in shape by the low-shrinkage layer such as aluminum or polyamide.
  • a foam may also be laminated to the backing layer to make the entire composite more elastic and more compressible. For example, vibrations that are omnipresent in the press can be better absorbed and a cleaner and more precise print image is achieved.
  • film composites can be formed, which form a combination of two beneficial properties, ie a PET layer to increase the thickness and a foam layer that ensures compressible properties.
  • FIG. 3 shows a laminate consisting of aluminum foil and TPU.
  • the aluminum foil forms the carrier of the film laminate.
  • a layer of PET was attached, which forms a protective layer and increases the thickness of the composite and thus the desired total thickness can be easily adjusted.
  • FIG. 4 shows a laminate consisting of polyamide film and TPU.
  • the polyamide film forms the carrier of the film laminate.
  • FIG. 5 shows a laminate consisting of polyamide film and TPU.
  • the polyamide film forms the carrier of the film laminate.
  • a layer of foam was attached to the polyamide on the underside, which increases the compressibility of the composite.
  • FIG. 6 shows a laminate consisting of aluminum foil and TPU.
  • the aluminum foil forms the carrier of the film laminate.
  • a layer of PET was attached to the underside of the aluminum, including foam. This makes it possible to adjust the thickness and the compressibility of the composite.
  • PET polyurethane
  • polyethylene polyethylene
  • polypropylene polyvinyl chloride
  • polyacrylates such as polymethyl methacrylate, polystyrene, polytetrafluoroethylene
  • polyamides other polyesters
  • polyglycols polyglycols
  • Silicones biopolymers, synthetically produced biodegradable polymers, or mixtures thereof
  • chemically-linked combinations such as copolymers. is selected.
  • metals or fabrics are also suitable.
  • Suitable materials for compressible, foamed layers are, in particular, polyurethanes, polyethylenes and polypropylenes, polystyrene, nitrile-butyl rubber, neoprenes, ethylene-propylene-diene rubber and silicones or mixtures of these materials.
  • the invention also provides a metal printing blanket comprising a metal layer, on top of which there is a printing layer, wherein on the underside of the metal layer of a backing film according to the invention is present.
  • Another object is the use of a backing sheet according to the invention as a support for a metal blanket.
  • a 50 .mu.m thick aluminum foil is bonded with a thermoplastic polyurethane film of 100 .mu.m thickness with Herberts EPS 7146®, a laminating adhesive from Bostik.
  • the thickness of the adhesive layer is 10 microns, the thickness of the overall composite is about 160 microns.
  • a 100 ⁇ m thick polyamide film is bonded to Herbert's EPS 7146® with a 70 ⁇ m thermoplastic polyurethane film.
  • the thickness of the adhesive layer is 8 microns, the thickness of the overall composite is about 178 microns.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Laminated Bodies (AREA)

Claims (8)

  1. Film de base pour un blanchet métallique pour l'impression comprenant au moins une couche de support dimensionnellement stable et un polymère thermosoudable, où la couche de support dimensionnellement stable est sélectionnée à partir de l'aluminium ou du polyamide, où le polymère thermosoudable adhère à la couche de support et où le polymère thermosoudable est un polyuréthane.
  2. Film de base selon la revendication 1, caractérisé en ce que le polymère thermosoudable est un polyuréthane à action de réticulation.
  3. Film de base selon l'une des revendications 1 ou 2, caractérisé en ce qu'une couche de polyester est en outre présente et se trouve en contact avec la couche de support dimensionnellement stable.
  4. Film de base selon l'une des revendications 1 ou 2, caractérisé en ce qu'une couche constituée d'une mousse polymère à cellules ouvertes ou fermées est en outre reliée, se trouvant en contact avec la couche de support dimensionnellement stable.
  5. Film de base selon l'une des revendications 1 ou 2, caractérisé en ce qu'une couche de polyester est présente et se trouve contact avec la couche de support dimensionnellement stable, laquelle couche de polyester est reliée à une couche constituée d'une mousse polymère à cellules ouvertes ou fermées.
  6. Blanchet métallique pour l'impression comprenant une couche métallique, sur la face supérieure de laquelle se trouve une couche d'impression, et dans lequel un film de base selon l'une des revendications 1 à 5 est présent sur la face inférieure de la couche métallique.
  7. Procédé destiné au montage d'un blanchet à dos métallique pour l'impression comprenant les étapes suivantes :
    a) mise en place d'un blanchet à dos métallique pour l'impression ;
    b) thermosoudage d'un film de base selon l'une des revendications 1 à 5.
  8. Utilisation d'un film de base, selon l'une des revendications 1 à 5, comme support pour un blanchet métallique pour l'impression.
EP12178440.9A 2012-07-30 2012-07-30 Feuille intérmediaire pour un blanchet métallique pour l'impression Not-in-force EP2692538B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12178440.9A EP2692538B1 (fr) 2012-07-30 2012-07-30 Feuille intérmediaire pour un blanchet métallique pour l'impression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12178440.9A EP2692538B1 (fr) 2012-07-30 2012-07-30 Feuille intérmediaire pour un blanchet métallique pour l'impression

Publications (2)

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EP2692538A1 EP2692538A1 (fr) 2014-02-05
EP2692538B1 true EP2692538B1 (fr) 2017-03-15

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ID=46614332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12178440.9A Not-in-force EP2692538B1 (fr) 2012-07-30 2012-07-30 Feuille intérmediaire pour un blanchet métallique pour l'impression

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52135386A (en) * 1976-05-08 1977-11-12 Gunze Kk Laminated film with good low temperature heat seal property
US4699841A (en) * 1985-02-25 1987-10-13 Akzo Nv Flexible multilayer polymide laminates

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20071348A1 (it) 2007-07-06 2009-01-07 Trelleborg Engineered Systems Metodo per la realizzazione di un rivestimento (metal back printing blanket) di cilindro tipografico con foglio plastico termoadesivo come sottorivestimento
EP2070717B1 (fr) * 2007-12-10 2013-05-15 Folex Coating GmbH Procédé de montage d'un blanchet de caoutchouc en impression offset
ATE543658T1 (de) * 2008-03-31 2012-02-15 Celfa Ag Selbsthaftende unterlagefolie

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52135386A (en) * 1976-05-08 1977-11-12 Gunze Kk Laminated film with good low temperature heat seal property
US4699841A (en) * 1985-02-25 1987-10-13 Akzo Nv Flexible multilayer polymide laminates

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Publication number Publication date
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