EP0108883A2 - Procédé pour empêcher la corrosion des cylindres pour machines d'impression - Google Patents

Procédé pour empêcher la corrosion des cylindres pour machines d'impression Download PDF

Info

Publication number
EP0108883A2
EP0108883A2 EP83108957A EP83108957A EP0108883A2 EP 0108883 A2 EP0108883 A2 EP 0108883A2 EP 83108957 A EP83108957 A EP 83108957A EP 83108957 A EP83108957 A EP 83108957A EP 0108883 A2 EP0108883 A2 EP 0108883A2
Authority
EP
European Patent Office
Prior art keywords
printing
corrosion
dampening
benzotriazole
cylinders
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.)
Granted
Application number
EP83108957A
Other languages
German (de)
English (en)
Other versions
EP0108883B1 (fr
EP0108883A3 (en
Inventor
Werner Dr.-Ing. Sondergeld
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT83108957T priority Critical patent/ATE39336T1/de
Publication of EP0108883A2 publication Critical patent/EP0108883A2/fr
Publication of EP0108883A3 publication Critical patent/EP0108883A3/de
Application granted granted Critical
Publication of EP0108883B1 publication Critical patent/EP0108883B1/fr
Expired 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
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/08—Damping; Neutralising or similar differentiation treatments for lithographic printing formes; Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development

Definitions

  • the invention relates to a compound of formula 1H-benzotriazole.
  • the flat printing process is based on the different wetting properties of printing ink and fountain solution. Influencing factors from a wide variety of problem areas, such as different dampening systems, printing plates, substrates and colors affect the printing process.
  • a wide variety of fountain solution additives are known. The correct use of the fountain solution additives means an improvement in economy.
  • DE-OS 2 914 255 it is known from DE-OS 2 914 255 to coat the surfaces of sheet-guiding cylinders to protect against the harmful effects of the materials used for printing and cleaning.
  • Inhibitors to slow the rate of corrosion of metals are known.
  • this inhibitor has not proven itself for the present problem.
  • the object of the invention is to find a method by which the corrosive phenomena that occur in offset printing machines, especially on the cylinders, are prevented.
  • a possibility is to be found to prevent the corrosion of nickel-plated cylinders.
  • the solution to the problem is achieved according to the invention in that the compound 1H-benzotriazole is used as an additive for fountain solution in offset printing machines.
  • 1H-benzotriazole has proven to be particularly effective for protecting nickel-plated cylinder surfaces. Surprisingly, the corrosion protection is complete at pH 5.5 and above. This is just a pH value that is preferably set for dampening solutions in the practice of offset printing.
  • the additive or inhibitor 1H-benzotriazole shows in a particularly advantageous manner no side effects on the properties and function of the printing plate, and on the printability and drying of the printing ink.
  • the inhibitor also has no harmful effects on the printing paper.
  • 1H-Benzotriazole is colorless and does not change the color of the printing paper.
  • the inhibitor does not affect the other components of the dampening solution and their effects.
  • Components are e.g. Buffer system, agent for reducing the surface tension, as well as antimicrobial additives.
  • Buffer system agent for reducing the surface tension
  • antimicrobial additives e.g., antimicrobial additives.
  • fountain solution additives must have an antimicrobial effect, i.e. preserve the fountain solution, because fountain solutions are generally good breeding grounds for microorganisms.
  • the 1 shows a dampening unit 1 with a water tank 2 in the area of a plate cylinder 3.
  • the plate cylinder 3 has a surface 4.1 on which a pressure plate rests.
  • the water tank 2 is arranged in the central axis position of the plate cylinder 3. From the water tank 2 lead 8 and return lines 9 to a dosing and tempering 6, which is filled via an inlet valve 13.
  • a pump 10 doses the liquid from the reservoir 6 into the water tank 2.
  • the liquid is supplied via the inlet valve 13 from a water reservoir 5.
  • a water pipe 14 fills the water reservoir 5 as required.
  • a surface 4 of the printing cylinder 17 can e.g. be nickel plated.
  • the liquid transfer to the pressure cylinder 17 takes place from the dampening unit 1.1. Here the liquid passes through a plate cylinder 3.1. From there, the liquid passes from below via a rubber cylinder 16.1 to the pressure cylinder 17 and thus enables the above-mentioned formation of corrosion.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Manufacturing Of Printed Circuit Boards (AREA)
EP83108957A 1982-11-13 1983-09-10 Procédé pour empêcher la corrosion des cylindres pour machines d'impression Expired EP0108883B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108957T ATE39336T1 (de) 1982-11-13 1983-09-10 Verfahren zur vermeidung von korrosion an druckmaschinenzylindern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3242104 1982-11-13
DE3242104A DE3242104C1 (de) 1982-11-13 1982-11-13 Verwendung eines Zusatzes zum Korrosionsschutz von Druckzylinderoberflaechen

Publications (3)

Publication Number Publication Date
EP0108883A2 true EP0108883A2 (fr) 1984-05-23
EP0108883A3 EP0108883A3 (en) 1986-08-20
EP0108883B1 EP0108883B1 (fr) 1988-12-21

Family

ID=6178109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108957A Expired EP0108883B1 (fr) 1982-11-13 1983-09-10 Procédé pour empêcher la corrosion des cylindres pour machines d'impression

Country Status (3)

Country Link
EP (1) EP0108883B1 (fr)
AT (1) ATE39336T1 (fr)
DE (2) DE3242104C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358113A3 (en) * 1988-09-08 1990-09-26 Hoechst Aktiengesellschaft Fountain solution for offset printing
US5523194A (en) * 1994-09-16 1996-06-04 E. I. Du Pont De Nemours And Company Fount solutions for planographic printing processes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE366560A (fr) * 1929-12-09
US3764323A (en) * 1971-04-15 1973-10-09 Apeco Corp Method of forming lithographic printing plate
US3969237A (en) * 1973-03-22 1976-07-13 Mobil Oil Corporation Lubricant compositions containing benzotriazole derivatives as copper passivators

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358113A3 (en) * 1988-09-08 1990-09-26 Hoechst Aktiengesellschaft Fountain solution for offset printing
US5523194A (en) * 1994-09-16 1996-06-04 E. I. Du Pont De Nemours And Company Fount solutions for planographic printing processes

Also Published As

Publication number Publication date
DE3242104C1 (de) 1985-08-14
DE3378725D1 (en) 1989-01-26
EP0108883B1 (fr) 1988-12-21
EP0108883A3 (en) 1986-08-20
ATE39336T1 (de) 1989-01-15

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