EP0914966B1 - Verbesserte lithographische Schicht für Drucktuch und Drucktuch das diese Schicht verwendet - Google Patents

Verbesserte lithographische Schicht für Drucktuch und Drucktuch das diese Schicht verwendet Download PDF

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Publication number
EP0914966B1
EP0914966B1 EP98402732A EP98402732A EP0914966B1 EP 0914966 B1 EP0914966 B1 EP 0914966B1 EP 98402732 A EP98402732 A EP 98402732A EP 98402732 A EP98402732 A EP 98402732A EP 0914966 B1 EP0914966 B1 EP 0914966B1
Authority
EP
European Patent Office
Prior art keywords
layer
lithographic
printing
blanket
elastomeric material
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
EP98402732A
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English (en)
French (fr)
Other versions
EP0914966A1 (de
Inventor
José Risquez
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.)
MacDermid Graphics Solutions Europe SAS
Original Assignee
MacDermid Graphic Arts SAS
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 MacDermid Graphic Arts SAS filed Critical MacDermid Graphic Arts SAS
Publication of EP0914966A1 publication Critical patent/EP0914966A1/de
Application granted granted Critical
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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
    • 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
    • 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
    • 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
    • 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
    • B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249955—Void-containing component partially impregnated with adjacent component
    • Y10T428/249956—Void-containing component is inorganic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249971—Preformed hollow element-containing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249978—Voids specified as micro
    • Y10T428/249979—Specified thickness of void-containing component [absolute or relative] or numerical cell dimension
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249987—With nonvoid component of specified composition
    • Y10T428/249991—Synthetic resin or natural rubbers

Definitions

  • the main subject of the present invention is a improved lithographic layer for blanket printing.
  • blankets for offset printing generally include a coated support one or more successive layers, themselves coated with an outer or printing layer commonly known as the lithographic layer.
  • the layer lithographic was in an incompressible material, such than nitrile rubber, so as to obtain a good offset printing quality.
  • WO 96/40528 describes a foam sheet and a printing blanket comprising said sheet, where the foam-like compositions are formed by mechanical skimming.
  • EP-A-222680 describes a foam layer comprising voids, usable for making printing blankets, said layer being sandwiched between two layers of fabric substrate.
  • the object of the present invention is to solve in particular the above problems and drawbacks by providing the lithographic layer a certain degree of compressibility which, contrary to all expectations, and whereas the incompressible lithographic layers of prior art were deemed to have the maximum printing advantages, gives said layer very important or even exceptional advantages.
  • the lithographic or printing layer according to this invention is made slightly compressible by including a multiplicity of voids in the elastomeric material constituting said layer.
  • This layer is further characterized in that the voids consist of pre-expanded microspheres or expandable in the elastomeric material.
  • the content of microspheres in the elastomeric material is included between about 0.5 and 10% by weight of the layer and preferably between 2 and 4% by weight of said layer.
  • the lithographic layer of this invention is still characterized in that the diameter of the microspheres in the elastomeric material of the layer is between about 10 and 30 microns.
  • the lithographic layer according to this invention has a thickness of less than 0.7 mm, and preferably less than or equal to 0.3 mm.
  • This invention further relates to a printing blanket comprising a lithographic layer corresponding to one and / or the other of the above characteristics.
  • This printing blanket can advantageously coat the shape of a sleeve.
  • Figure 1 is a schematic sectional view cross-section of a blanket embodiment printing equipped with an outer layer or lithographic sleeve, according to the invention.
  • Figure 2 is a schematic sectional view, more large scale, lithographic layer.
  • Figure 3 is a schematic sectional view of the contact area of two lithographic layers incompressible according to the prior art.
  • Figure 4 is a schematic sectional view of the external face of an incompressible lithographic layer according to the prior art, after finishing by polishing this layer.
  • Figure 5 illustrates the displacement D (microns) in blanket surface, i.e. displacement of the lithographic layer, as a function of position P (millimeters) in the contact area between two blankets.
  • a printing blanket 1 1 which, following the example shown, has the form of a cylinder or sleeve made up, from the inside to the outside, of a support 2 made of metal or other material rigid, of a compressible layer 3 into an elastomer cellular or not, and a lithographic layer 4 according to this invention.
  • the support 2 can have a diameter of about 200 mm and a thickness between 0.1 and 0.3 mm.
  • lithographic layer 4 other layers (not shown) with the layer compressible 3, that is to say, in general, any combination of layers between support 2 and lithographic layer 4.
  • layer compressible 3 that is to say, in general, any combination of layers between support 2 and lithographic layer 4.
  • support 2 may be omitted or replaced by means equivalents.
  • the lithographic layer 4 which is in one elastomeric material is made compressible by the inclusion of a multiplicity of voids in said elastomeric material.
  • This elastomeric material can be any type of rubber known in the art such as rubber vulcanizable nitrile or even combinations nitrile rubber / polysulfide. Also, the material elastomer could be a thermoplastic elastomer crosslinked or not.
  • the voids consist of microspheres 5 incorporated into the elastomeric material of the layer lithographic 4.
  • microspheres 5 can be pre-expanded and incorporated for example in an elastomeric material thermosetting to form the layer lithographic 4.
  • microspheres which are expandable in the elastomeric material, i.e. which contain a solvent which, under the effect of heat at about 100-150 °, causes the expansion of microspheres.
  • Such expandable microspheres can be for example incorporated into an elastomer thermoplastic which can be crosslinked or not.
  • the content of microspheres 5 in the lithographic layer 4 made of elastomeric material constitutes approximately 0.5 to 10% by weight of said layer.
  • a microsphere content will be used between 2 and 4% by weight of layer 4.
  • the diameter of the microspheres 5 in the layer 4 elastomer material will be between about 10 and 30 microns.
  • the thickness E of the layer lithographic 4 with incorporated microspheres 5 sera less than 0.7 mm.
  • the thickness E of the layer 4 will be less than or equal to 0.3 mm.
  • the Young's modulus of the layer lithographic 4 will preferably be located in the interval 1 to 8 megapascals.
  • FIG. 5 illustrates the results of simulations and tests carried out on the lithographic layer 4, compared to a layer classic lithography of the prior art, that is to say an incompressible layer with no voids.
  • the lithographic layer 4 slightly compressible according to this invention will absorb advantageously possible irregularities of any underlying layer, so that the printing surface will be improved.
  • the lithographic layer 4 due to its compressibility, will avoid the presence of beads in the contact area between two printing cylinders, i.e. the area where the paper is pinched between these cylinders. In other words, it will only occur significantly no deformation at the surface of the lithographic layer 4, contrary to what was the case, as seen in FIG. 3, with lithographic layers 10 of the prior art which, at the level of the contact zone Z, necessarily had beads B at the entrance 11 of the paper along the path X-X ', and at the outlet of paper in contact zone Z. Faults printing due to these beads B during the rolling of the blankets are therefore removed with the layer lithographic 4 of the invention.
  • the absence of beads and therefore of deformations of the lithographic layer 4 will avoid any deformation paper and will avoid any offset or cropping of the colors on both sides of the paper. all distortion of the printed image will therefore be advantageously avoided.
  • the lithographic layer according to this invention is more tolerant of variations in thickness without compromise print quality.
  • curve J relates to a layer incompressible lithographic according to the prior art
  • curve K relates to a compressible lithographic layer according to the invention and containing a void content or 4% microspheres
  • curve L concerns a layer lithographic produced according to the principles of the invention with a microsphere content of 10%.
  • the contact zone has a total length of about 8 mm, since it stops respectively on the abscissa -4 and +4 mm.
  • the beads B ( Figure 3) created on the surface of the layer lithographic according to the prior art result in displacement peaks marked J1 in FIG. 4 in entering and leaving the contact zone, these beads affecting in particular the flow of paper and creating printing faults as previously explained.

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Claims (6)

  1. Lithographische oder Druckschicht aus Elastomer für Drucktuch, die durch Einschluß einer Vielzahl von Hohlräumen im die besagte Schicht (4) bildenden Elastomer leicht komprimierbar gemacht wurde, dadurch gekennzeichnet, daß die Hohlräume durch im Elastomer vorexpandierte oder expandierbare Mikrosphären (5) gebildet werden.
  2. Lithographische Schicht gemäß Anspruch 1, dadurch gekennzeichnet, daß der Gehalt an Mikrosphären (5) im Elastomer zwischen ungefähr 0,5 und 10% des Gewichts der Schicht (4) und bevorzugt zwischen 2 und 4% des Gewichts besagter Schicht inbegriffen ist.
  3. Lithographische Schicht gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Durchmesser der Mikrosphären (5) im Elastomer der Schicht (4) zwischen ungefähr 10 und 30 Mikron inbegriffen ist.
  4. Lithographische Schicht gemäß einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß sie eine Stärke (E) unter 0,7 mm und bevorzugt unter oder gleich 0,3 mm hat.
  5. Drucktuch, umfassend eine äußere lithographische Schicht (4) gemäß Anspruch 1 bis 4.
  6. Drucktuch gemäß Anspruch 5, dadurch gekennzeichnet, daß es die Form einer Muffe aufweist.
EP98402732A 1997-11-06 1998-11-02 Verbesserte lithographische Schicht für Drucktuch und Drucktuch das diese Schicht verwendet Expired - Lifetime EP0914966B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9713978 1997-11-06
FR9713978A FR2770451B1 (fr) 1997-11-06 1997-11-06 Couche lithographique perfectionnee pour blanchet d'impression et blanchet equipe de cette couche

Publications (2)

Publication Number Publication Date
EP0914966A1 EP0914966A1 (de) 1999-05-12
EP0914966B1 true EP0914966B1 (de) 2002-03-13

Family

ID=9513120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98402732A Expired - Lifetime EP0914966B1 (de) 1997-11-06 1998-11-02 Verbesserte lithographische Schicht für Drucktuch und Drucktuch das diese Schicht verwendet

Country Status (7)

Country Link
US (1) US6146748A (de)
EP (1) EP0914966B1 (de)
JP (1) JPH11208139A (de)
AU (1) AU743882B2 (de)
CA (1) CA2252897C (de)
DE (1) DE69804187T2 (de)
FR (1) FR2770451B1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952802A1 (de) * 1999-11-02 2001-05-03 Roland Man Druckmasch Druckwerk für den Druck von Wellkarton
FR2809666B1 (fr) * 2000-05-31 2003-03-14 Rollin Sa Procede de fabrication d'un blanchet d'impression multicouches et blanchet ainsi obtenu
FR2809667B1 (fr) 2000-05-31 2003-03-14 Rollin Sa Procede de fabrication d'un blanchet d'impression et blanchet ainsi obtenu
FR2809665B1 (fr) * 2000-05-31 2003-03-14 Rollin Sa Procede de fabrication d'un blanchet d'impression comportant une couche au dos en un materiau polymere et blanchet ainsi obtenu
US20020119323A1 (en) * 2000-12-15 2002-08-29 Johann Weinert Compressible polyurethane layer and process for the preparation therof
DE50114671D1 (de) * 2000-12-15 2009-03-12 Boettcher Gmbh & Co Felix Rotationssymmetrischer Körper, kompressible Polyurethananschicht und Verfahren zur Herstellung derselben
US20060060317A1 (en) * 2004-09-20 2006-03-23 International Paper Company Method to reduce back trap offset print mottle
FR2887490B1 (fr) * 2005-06-23 2008-12-19 Macdermid Graphic Arts Sas Soc Blanchet d'impression offset et procede de realisation d'un tel blanchet
DE102010055576A1 (de) 2010-12-21 2012-06-21 Manroland Ag Drucktuch für eine Rollenrotationsdruckmaschine

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE831705C (de) * 1950-10-06 1952-02-18 Continental Gummi Werke Ag Drucktuch, insbesondere fuer Unterzugszwecke
DE1165046B (de) * 1961-03-09 1964-03-12 Continental Gummi Werke Ag Drucktuch
US4093764A (en) * 1976-10-13 1978-06-06 Dayco Corporation Compressible printing blanket
US4093487A (en) * 1976-11-15 1978-06-06 Dayco Corporation Method of continuously making a printing blanket construction
US4337700A (en) * 1980-05-30 1982-07-06 Pathfinder Graphic Associates, Inc. Blanket cylinder construction for printing press
DE3401350C2 (de) * 1984-01-17 1986-01-23 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Zylinderaufzug für einen Gummizylinder einer Offsetrotationsdruckmaschine
US4771078A (en) * 1985-11-12 1988-09-13 The Goodyear Tire & Rubber Company Method of producing a foam from a radiation-curable composition
FR2631668B2 (fr) * 1988-01-15 1993-11-12 Hutchinson Supports elastiques de suspension
IT219231Z2 (it) * 1990-02-09 1993-02-08 Fiocchi Munizioni Spa Contenitore alveolare per inneschi esplosivi
US5069958A (en) * 1990-05-29 1991-12-03 Milliken Research Corporation Printer's blanket
US5066537A (en) * 1990-10-04 1991-11-19 W. R. Grace & Co.-Conn. Printing blanket containing a high elongation fabric
AU619437B3 (en) * 1991-03-25 1991-11-20 Franciscus Martina Johannes Van Eijndhoven Vertical pole ground anchor
DE4203148C2 (de) * 1992-02-05 1994-02-03 Koenig & Bauer Ag Anordnung zum Halten der unteren Lage von zweilagigen Aufzügen für Druckzylinder von Rotationsdruckmaschinen
US5350623A (en) * 1992-09-21 1994-09-27 Derrick Steven L Compressible blanket assembly
FR2718079B1 (fr) * 1994-03-31 1996-05-15 Rollin Sa Blanchet d'impression perfectionné et cylindre d'impression équipé de ce blanchet.
AU4705596A (en) * 1995-06-07 1996-12-30 Pt Sub, Inc. Thiol-containing photosensitive polymeric foam compositions

Also Published As

Publication number Publication date
CA2252897C (en) 2008-02-19
FR2770451A1 (fr) 1999-05-07
JPH11208139A (ja) 1999-08-03
US6146748A (en) 2000-11-14
DE69804187T2 (de) 2002-11-07
AU9140198A (en) 1999-05-27
FR2770451B1 (fr) 1999-12-31
EP0914966A1 (de) 1999-05-12
DE69804187D1 (de) 2002-04-18
AU743882B2 (en) 2002-02-07
CA2252897A1 (en) 1999-05-06

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