EP0284972B1 - Procédé pour obturer des fentes ou des enceintes crées par l'application de clichés sur des cylindres d'impression - Google Patents

Procédé pour obturer des fentes ou des enceintes crées par l'application de clichés sur des cylindres d'impression Download PDF

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Publication number
EP0284972B1
EP0284972B1 EP88104605A EP88104605A EP0284972B1 EP 0284972 B1 EP0284972 B1 EP 0284972B1 EP 88104605 A EP88104605 A EP 88104605A EP 88104605 A EP88104605 A EP 88104605A EP 0284972 B1 EP0284972 B1 EP 0284972B1
Authority
EP
European Patent Office
Prior art keywords
printing
sealing
oils
highly fluorinated
dispersion
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
EP88104605A
Other languages
German (de)
English (en)
Other versions
EP0284972A2 (fr
EP0284972A3 (en
Inventor
Guenter Dr. Wallbillich
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP0284972A2 publication Critical patent/EP0284972A2/fr
Publication of EP0284972A3 publication Critical patent/EP0284972A3/de
Application granted granted Critical
Publication of EP0284972B1 publication Critical patent/EP0284972B1/fr
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
    • B41N6/02—Chemical means for fastening printing formes on mounting boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1293—Devices for filling up the cylinder gap; Devices for removing the filler

Definitions

  • the invention relates to a method for closing and / or sealing openings, cavities or gaps, such as result from the application of printing plates to forme cylinders, in particular in the region of the end or edge sections of the printing plates, by means of a sealing or sealing compound.
  • the method according to the invention is particularly suitable for closing and / or sealing such openings, cavities or interspaces in intaglio printing plates applied to forme cylinders.
  • rotary printing forms For the production of rotary printing forms, it is known to wrap form cylinders with flat printing plates and to fasten them to the form cylinders in a suitable manner, for example by gluing, magnetically or mechanically by means of suitable holding and clamping elements.
  • a suitable manner for example by gluing, magnetically or mechanically by means of suitable holding and clamping elements.
  • only one printing plate or several printing plates can be applied one behind the other and / or next to one another on the surface of a forme cylinder.
  • This method of producing rotary printing forms is becoming increasingly important, especially in rotogravure printing, because of the simple and cost-saving production and handling of gravure winding plates.
  • the intaglio printing plates are preferably applied to the form cylinder by folding one or both of their end sections and hooking these folded areas into a groove of the forme cylinder provided for this purpose while simultaneously tensioning the intaglio plate.
  • Such openings or gaps which form when applying printing plates to forme cylinders have to be closed in a suitable manner in order to prevent penetration of printing ink, which may result, for example, in detaching the adhesive of the printing plate on the forme cylinder or, in particular in gravure printing, injecting the printing ink and unwanted impression of the column can lead, and also to ensure a smooth squeegee run and thereby prevent damage to the squeegee and printing form surface.
  • the printing surface bounding metal rings are also on the forme cylinder end faces between the forme cylinder surface and the side areas of the applied printing plate or between the printing form surface and the side of the printing cylinder.
  • the present invention has for its object the openings and gaps that form when applying and fixing printing plates to forme cylinders, such as e.g. Gaps, joints, holes, cavities and the like. Sealing and / or sealing quickly and effectively with little effort, while avoiding the disadvantages known from the prior art, so that an all-round uninterrupted printing form surface is obtained which corresponds to the mechanical and withstands chemical stresses.
  • the invention accordingly relates to a method for closing and / or sealing openings, cavities or gaps which are formed when printing plates are applied to forme cylinders, by means of a sealing or sealing compound, which is characterized in that it is used as a sealing or sealing compound a viscous, pasty mass at room temperature based on a dispersion of a solid, powdery, highly fluorinated olefin polymer in an inert, low-volatility, organic liquid is used.
  • the method according to the invention can be used with printing plates of all types applied to forme cylinders, for example high-pressure and flexographic printing plates, it has proven to be particularly favorable and advantageous for gravure printing plates applied to forme cylinders.
  • the sealing or sealing compounds to be used according to the invention the printing plates can not only be held and fixed in any desired position on the forme cylinders, it also prevents the penetration of even thin liquid printing ink into the openings, cavities or gaps mentioned the resulting disadvantages prevented.
  • the openings, voids or gaps closed and / or sealed by the process according to the invention are outstandingly chemically and mechanically stable under the requirements and stresses during printing, show no weaknesses and that those according to the process of the invention Rotogravure forms produced allow a smooth, smooth and smooth sliding of the squeegee on the printing form surface without damaging it.
  • the method according to the invention is particularly advantageous since it can be used universally, there is no need to harden or dry the sealing or sealing compound and the sealing or sealing compound to be used according to the invention is simple and easy to process in the method according to the invention.
  • the method according to the invention is suitable for closing and / or sealing any kind of openings, cavities or gaps in the case of printing plates applied to forme cylinders, it is particularly suitable and can be used without problems and advantageously when closing and / or sealing small or narrow gaps, joints, other openings, spaces and the like.
  • the sealing or sealing compounds to be used according to the invention are viscous, rigid, pasty dispersions of solid, powdery, highly fluorinated, preferably perfluorinated, olefin polymers in inert, low-volatility, organic liquids at room temperature.
  • Highly fluorinated olefin polymers are both highly fluorinated homopolymers and highly fluorinated copolymers of olefins, in particular of ethylene and propylene, and also highly fluorinated olefin polymers which contain ether groups in the main polymer chain.
  • the dispersions to be used according to the invention contain solid, powdery homopolymers or copolymers of highly fluorinated, in particular perfluorinated, ethylene or highly fluorinated, in particular perfluorinated, propylene. These include in particular the polytetrafluorethylene, polyhexafluoropropylene and tetrafluoroethylene-hexafluoropropylene copolymers.
  • the solid, powdery, highly fluorinated olefin polymers contained in the dispersions to be used according to the invention are finely divided and, in addition to fluorine, may also contain to a lesser extent other halogen atoms, in particular chlorine atoms.
  • the solid, powdery, highly fluorinated olefin polymers are preferably perhalogenated, in particular perfluorinated.
  • the viscous, pasty dispersions to be used as sealing or sealing compound according to the invention contain, as a further component, one or more inert, low-volatility organic liquids which act as dispersants for the solid, powdery, highly fluorinated Olefin polymers act.
  • inert, low-volatility, organic dispersing liquids are high-boiling fluorocarbon oils, fluorinated polyether oils, silicone oils or greases or fluorosilicone oils.
  • the inert, organic dispersing liquids are generally low-volatility oils, but they can also be greases.
  • the inert, low-volatility, organic dispersing liquids are: the corresponding, known fluorinated hydrocarbon oils; highly fluorinated, preferably perfluorinated, polyalkylene ether oils, preferably those polyether oils which are composed of recurring oxyperfluoroalkylene units of the formulas -CF2-O-, -C2F4-O- and / or -C3F6-O-, as described, for example, in DE-A-2 633 736 or are commercially available under the brand name FOMBLIN; Silicone oils or fats, for example of the type of polysiloxanes, such as polyphenylmethylsiloxane, or of the type of reticulated silicone polymers, for example methyl silicone polymers of oily or fatty consistency; as well
  • the dispersions to be used according to the invention can be prepared in a conventional manner known per se by intimate mixing, for example stirring or kneading, of the individual components.
  • the solid, powdery, highly fluorinated olefin polymers and the inert, low-volatility, organic dispersing liquids are selected according to type and quantity and coordinated with one another such that a stable dispersion of the solid, powdery, highly fluorinated olefin polymers in the inert, low-volatility, organic dispersing liquid is produced and this dispersion has a stiff, paste-like consistency at room temperature and is viscoplastic so that it can be deformed under the influence of pressure and shear force, but is not self-flowing.
  • the dispersions to be used according to the invention are usually solvent-free and the weight ratio of powdery, highly fluorinated olefin polymer to the inert, low-volatility, organic dispersion liquid is in the range from about 3: 7 to 6: 4.
  • dispersions which are particularly suitable as sealants or sealing compounds in the process according to the invention are paste-like, rigid, viscoplastic dispersions of powdered polytetrafluoroethylene in perfluoropolyalkylene ether oils of the type mentioned above in a polymer: oil weight ratio of about 35:65 and paste-like, rigid, viscous dispersions of powdery polytetrafluoroethylene in silicone oil, for example polyphenylmethylsiloxane, in a polymer: oil weight ratio of about 1: 1.
  • the viscous, pasty sealing or sealing compounds to be used according to the invention adhere well to metallic and plastic surfaces, so that when they are used according to the invention when closing and / or sealing openings, cavities or gaps in the case of printing plates attached to forme cylinders, a stable connection in the closed or sealed areas. Since the viscous, paste-like sealing or sealing compounds to be used according to the invention do not harden and do not change in any other way, e.g. shrink, the desired effect is retained without restriction during the entire print run when used in accordance with the invention. In particular, they are completely resistant to the ink solvents, i.e. they do not swell or soften and do not change in their other properties.
  • viscous, paste-like dispersions to be used in the process according to the invention as a sealing or sealing compound is that, during the printing process, their shape and surface meet the requirements in the machine, even under the action of the impression cylinder and doctor blade adapt to the mechanical conditions of the printing gap or the doctor blade facet.
  • the viscous, pasty dispersions to be used according to the invention are toxicologically completely harmless and very temperature-stable, i.e. they do not change even at temperatures up to about 200 ° C and more.
  • the viscoplastic, pasty dispersions of the type mentioned can be used to a large extent for closing and / or sealing openings, cavities or gaps which result when printing plates are applied to forme cylinders.
  • the viscous, pasty dispersions to be used according to the invention can be introduced between the printing plate and the forme cylinder, as a result of which not only is the printing plate adhering and fixed on the form cylinder, but at the same time penetration of the printing ink between the printing plate and the form cylinder is avoided.
  • the gap which results when a printing cylinder is wrapped around a printing plate between the, if appropriate folded, end areas of the printing plate, or when a plurality of printing plates are applied behind and / or next to one another on a form cylinder The gaps that result between the end and / or side areas of these printing plates mounted on a forme cylinder are closed and sealed. It has turned out to be a particular advantage that even very narrow and small gaps or joints, which result when printing plates are applied to forme cylinders between the end and / or side areas of the printing plates, can be easily and easily closed according to the invention.
  • the viscous, pasty dispersions to be used according to the invention can be used, for example, to seal the lateral end points of the gap or to close individual openings or joints required for the sealing process with hardenable gap sealing compounds.
  • the application of the viscoplastic, paste-like dispersions to be used in the process according to the invention as sealing or sealing compounds can be carried out in a very simple manner by simply applying the viscous-plastic, paste-like dispersion to the areas of the printing plates and / or forme cylinders to be sealed and by simple mechanical pressing and tightening or Pressing into the openings or cavities to be closed, for example using a spatula, scraper or the like. Excess dispersion material can then be easily removed by simply wiping off the printing form surface or the end faces of the printing form cylinder thus obtained.
  • all known and customary printing plates that can be clamped on forme cylinders of a sheet-fed or web-fed rotary printing press can be used, such as, for example, the known photopolymer high-pressure plates and flexographic printing plates.
  • the method according to the invention is particularly advantageous for gravure printing plates applied to forme cylinders of a rotogravure printing machine.
  • the method according to the invention can be used both for conventional gravure printing plates made of metal with Ballard skin and with particular advantage especially for gravure printing plates with plastic printing layers in which a plastic printing layer is applied to a suitable printing layer support, in particular made of metal, into which the ink-absorbing layers are applied Wells (wells), be it by mechanical engraving or by laser engraving (cf. e.g.
  • rotogravure plates are understood to mean the finished rotogravure plates in which the ink-guiding depressions have already been introduced, as well as the rotogravure plate blanks in which the cells have not yet been formed.
  • printing plates are generally understood to mean both the printing plate blanks which do not yet contain any image information and the finished printing plates with image information, differentiating the printing and non-printing areas.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Material Composition (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Moulding By Coating Moulds (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Claims (10)

  1. Procédé pour obturer et/ou boucher des orifices, espaces creux ou intervalles formés lors de l'application de plaques d'impression sur un cylindre imprimeur, au moyen d'une masse d'étanchéité ou d'obturation, caractérisé en ce que l'on utilise en tant que masse d'étanchéité ou d'obturation une masse pâteuse, plastique et résistante à température ambiante, à base d'une dispersion d'un polymère solide, pulvérulent, d'oléfine fortement fluorée dans un liquide organique inerte, peu volatil.
  2. Procédé selon la revendication 1, caractérisé en ce que la dispersion contient un homo- ou co-polymère solide pulvérulent d'oléfine fortement fluorée, en particulier d'éthylène ou de propylène perfluoré.
  3. Procédé selon la revendication 2, caractérisé en ce que la dispersion contient, en tant que polymère solide pulvérulent d'oléfine fortement fluorée, un polytétrafluoréthylène, un polyhexafluoropropylène, un copolymère tétrafluoréthylène-hexafluoropropylène ou un mélange de tels polymères.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la dispersion contient, en tant que liquide organique inerte peu volatil servant de milieu dispersant pour les polymères pulvérulents d'oléfines fortement fluorées, des huiles d'hydrocarbures fluorés, des huiles de polyéthers fortement fluorés, des huiles ou graisses de silicones ou des huiles de fluoro-silicones.
  5. Procédé selon la revendication 4, caractérisé en ce que la dispersion contient, en tant que liquide organique inerte peu volatil, une huile de polyalkylèneéther perfluoré constitué de motifs répétés de formules -CF₂-O-, -C₂F₄-O et/ou -C₃F₆-O-, ou de mélanges de ces motifs.
  6. Procédé selon la revendication 4, caractérisé en ce que la dispersion contient, en tant que liquide organique inerte peu volatil, un polysiloxane éventuellement fluoré à consistance huileuse ou grasse.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la dispersion contient les polymères pulvérulents d'oléfines fortement fluorées et le liquide organique inerte peu volatil dans des proportions relatives en poids allant d'environ 3:7 à 6:4.
  8. Procédé selon l'une des revendications 1 à 5 ou 7, caractérisé en ce que l'on utilise une dispersion pâteuse, plastique et résistante, d'un polytétrafluoréthylène pulvérulent dans des huiles de polyalkylène-éthers perfluorés contenant elles-mêmes des motifs répétés de formule -CF₂-O-, -C₂F₄-O- et/ou -C₃F6-O- en des proportions relatives en poids d'environ 35:65 entre le polytétrafluoréthylène et l'huile de polyalkylèneéther perfluoré.
  9. Procédé selon l'une des revendications 1 à 4 ou 6 à 7, caractérisé en ce que l'on utilise une dispersion pâteuse, plastique et résistante, d'un polytétrafluoréthylène pulvérulent dans du polyphénylméthylsiloxane, en des proportions relatives en poids d'environ 1:1 entre le polytétrafluoréthylène et le polyphénylméthylsiloxane.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce que, pour l'obturation ou le bouchage des orifices, des espaces creux ou des intervalles, la dispersion pâteuse, plastique et résistante, est appliquée mécaniquement et refoulée sous pression.
EP88104605A 1987-03-31 1988-03-23 Procédé pour obturer des fentes ou des enceintes crées par l'application de clichés sur des cylindres d'impression Expired - Lifetime EP0284972B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3710146 1987-03-31
DE19873710146 DE3710146A1 (de) 1987-03-31 1987-03-31 Verfahren zum verschliessen und/oder abdichten von oeffnungen, hohl- oder zwischenraeumen bei auf formzylindern aufgebrachten druckplatten

Publications (3)

Publication Number Publication Date
EP0284972A2 EP0284972A2 (fr) 1988-10-05
EP0284972A3 EP0284972A3 (en) 1989-11-08
EP0284972B1 true EP0284972B1 (fr) 1991-11-06

Family

ID=6324140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88104605A Expired - Lifetime EP0284972B1 (fr) 1987-03-31 1988-03-23 Procédé pour obturer des fentes ou des enceintes crées par l'application de clichés sur des cylindres d'impression

Country Status (5)

Country Link
US (1) US5075365A (fr)
EP (1) EP0284972B1 (fr)
JP (1) JPS63262291A (fr)
DE (2) DE3710146A1 (fr)
ES (1) ES2026958T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920093A1 (de) * 1989-06-20 1991-01-03 Basf Ag Verfahren zum verschliessen und/oder abdichten von oeffnungen, hohl- oder zwischenraeumen bei auf formzylindern aufgebrachten druckplatten
GB2248845B (en) * 1990-10-17 1994-08-10 Ass Elect Ind A sealing composition and a mineral insulated electric cable termination employing such composition
WO1992021715A1 (fr) * 1991-06-04 1992-12-10 Donaldson Company, Inc. Produits au polytetrafluoroethylene traites avec un fluide et leur fabrication
DE19731771A1 (de) * 1997-07-24 1999-01-28 Bultykhanova Natalia Abdichtungsverfahren
US6911488B2 (en) 2000-09-27 2005-06-28 Shamrock Technologies, Inc. Physical methods of dispersing characteristic use particles and compositions thereof
US7600853B2 (en) * 2005-11-17 2009-10-13 Lexmark International, Inc. Liquid applied seal for inkjet orifices

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363464A (en) * 1930-10-31 1931-12-24 George Thomas Baldwin Improvements in or relating to printing cylinders
US2056991A (en) * 1934-03-13 1936-10-13 Hoe & Co R Printing cylinder
US2285116A (en) * 1938-10-12 1942-06-02 Interchem Corp Printing plate
US3740369A (en) * 1971-06-25 1973-06-19 Du Pont Low viscosity solution of fluoropolymer due to the use of polar organic compounds
US3879302A (en) * 1973-07-10 1975-04-22 Ebert Michael Fluorocarbon-based sealing compound
IT1040273B (it) * 1975-07-30 1979-12-20 Montedison Spa Oli perfluoropolieterei selezionati ad altissima purezza ea bassa volatilita
DE2545124C3 (de) * 1975-10-08 1979-05-10 Albert-Frankenthal Ag, 6710 Frankenthal Vorrichtung zum Aufspannen von biegsamen Druckplatten auf dem Formzylinder von Rotations-Tiefdruckmaschinen
DE2545618A1 (de) * 1975-10-11 1977-04-21 Frankenthal Ag Albert Formzylinder fuer tiefdruck mit einer magnetisch aufgespannten wickelplatte
DE2633445A1 (de) * 1976-07-24 1978-01-26 Frankenthal Ag Albert Formzylinder zum aufspannen von wickelplatten fuer das tiefdruckverfahren
ES462278A1 (es) * 1976-09-18 1978-05-16 Hoechst Ag Procedimiento para la fabricacion de material para juntas defibras de politetrafluoretileno.
AU5179879A (en) * 1978-10-17 1980-04-24 Unasco Pty. Ltd. Pipe jointing or sealing compositions
DK159251C (da) * 1983-03-12 1991-02-18 Basf Ag Fremgangsmaade til lukning af spalten mellem en paa et dybtrykapparats trykformcylinder opspaendt dybtrykplades ender, samt indretning ved dybtryksapparatet, til udoevelse af fremgangsmaaden
GB8416571D0 (en) * 1984-06-29 1984-08-01 Asahi Chemical Industry Uk Ltd Flexographic printing
DE3433045A1 (de) * 1984-09-08 1986-03-20 Basf Ag, 6700 Ludwigshafen Lichthaertbare verschlussmasse, insbesondere zum verschliessen des spaltes zwischen den enden von auf formzylinder aufgespannten tiefdruckplatten
DE3433046A1 (de) * 1984-09-08 1986-03-20 Basf Ag, 6700 Ludwigshafen Verfahren zum verschliessen des spaltes zwischen den enden von auf formzylindern aufgespannten tiefdruckplatten

Also Published As

Publication number Publication date
EP0284972A2 (fr) 1988-10-05
EP0284972A3 (en) 1989-11-08
US5075365A (en) 1991-12-24
DE3865994D1 (de) 1991-12-12
ES2026958T3 (es) 1992-05-16
DE3710146A1 (de) 1988-10-13
JPS63262291A (ja) 1988-10-28

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