EP0394560A2 - Rouleaux encreurs oléophiles hydrophobes et microporeux - Google Patents

Rouleaux encreurs oléophiles hydrophobes et microporeux Download PDF

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Publication number
EP0394560A2
EP0394560A2 EP89124064A EP89124064A EP0394560A2 EP 0394560 A2 EP0394560 A2 EP 0394560A2 EP 89124064 A EP89124064 A EP 89124064A EP 89124064 A EP89124064 A EP 89124064A EP 0394560 A2 EP0394560 A2 EP 0394560A2
Authority
EP
European Patent Office
Prior art keywords
oleophilic
ink
poly
copolymers
organic 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.)
Granted
Application number
EP89124064A
Other languages
German (de)
English (en)
Other versions
EP0394560B1 (fr
EP0394560A3 (fr
Inventor
Thomas A. Fadner
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.)
Boeing North American Inc
Original Assignee
Rockwell International Corp
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 Rockwell International Corp filed Critical Rockwell International Corp
Publication of EP0394560A2 publication Critical patent/EP0394560A2/fr
Publication of EP0394560A3 publication Critical patent/EP0394560A3/fr
Application granted granted Critical
Publication of EP0394560B1 publication Critical patent/EP0394560B1/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
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/06—Shells for rollers of printing machines for inking rollers
    • 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
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/02—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
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/10—Location or type of the layers in shells for rollers of printing machines 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
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds

Definitions

  • Fadner and Hycner in U.S. Patent 4,537,127 and Fadner in U.S. Patent 4,603,634 have disclosed advantageous method and means wherein the surface of an ink metering roller will possess the dual property of being both hydrophobic and oleophilic, that is water-repelling and oil attracting. This dual property can be present whether the lithographic ink metering roller surface is formed with ink retaining dimensioned cells or is formed with a surface possessing irregularly spaced cavities capable of retaining ink.
  • Fadner, et al, prior art references also teach that even when consistent ink metering is assured by providing a metering roller surface that is both hydrophobic and oleophilic, the water contents of the ink films on the inking rollers may vary across the press width, depending upon the relative amounts of ink and water consumed in satisfying the format being printed.
  • To accomplish uniform ink availability across the press during a printing run it is necessary to assure that a constant ink composition is continuously available to all portions of the printing plate. Unless constant ink composition is available across the press width, the water content tends to increase in regions of low print density and undesirable print quality occurs.
  • Means for obtaining press wide uniformity of ink composition are disclosed in the Fadner, et al U.S. Patent 4,690,055.
  • Printing formats are not uniform generally and are rarely the same from press-run to press-run. Consequently, the extent of ink debonding by water when operating an apparatus utilizing the oleophilic and hydrophilic technology will depend upon the instantaneous amounts of water present in the ink at various locations on the metering roller. These locations correspond in turn to the various cross-press ink and water amounts required to print the format on the printing plate. The higher the water content in the ink at a hydrophilic/region, the greater will be the propensity for loss of ink carrying capability because of debonding of ink in the corresponding localized region. The result is variable ink input from press-run to press-run as the printed format is changed, with concomitant printed regions of unexpectedly low or unexpectedly high optical density.
  • Hard ceramic materials such as chromium and aluminum oxides and tungsten carbide are naturally high energy materials and correspondingly tend to be hydrophilic in the presence of water and tend to be oleophilic in the presence only of oily materials.
  • Metering rollers manufactured using these materials while often used successfully in conjunction with either water based inks or with oil based inks in letterpress printing, fail to deliver consistent quantities of ink during lithographic printing utilizing oil-based inks having water present.
  • the extent of ink delivery inconsistency is determined by whether water present in the ink has displaced or debonded ink from the roller's ceramic surface. As previously noted, the extent of debonding depends upon the water content of the ink at any selected cross-press location, which water content in turn depends upon the format being printed.
  • Fadner U.S. Patent 4,601,242 discloses one means to use the advantageously hard and wear-resistant ceramic property to obtain reasonably long lithographic ink metering roller lifetimes.
  • ceramic powder, and in particular alumina is flame sprayed in a purposefully thin layer of less than about 2 mils thickness over a copper-plated metering roller base. Copper is naturally hydrophobic and oleophilic. This procedure results in a hard, wear-resistant surface that has sufficient inter-particle porosity relative to ink and water interactions that the surface acts as if it was copper, therefore retaining ink in preference to water, yet simultaneously acts as a wear-resistant ceramic material relative to scraping blade wearing action.
  • An additional object of this invention is to provide a process for producing an ink metering roll having a micro-porous wear-resistant surface layer that is infused with a chemically inert substantially organic material that is oleophilic and hydrophobic.
  • Still another object of this invention is to provide means whereby hard and wear-resistant but naturally hydrophilic ceramic materials can be used as part of a composite layer that has hydrophobic and oleophilic properties without detracting from their naturally excellent wear-resistant quality.
  • a further object of this invention is to provide an improved inking roller having a composite structure that combines high degrees of wear resistance with a preferential attraction for and retention of oil inks in the presence of water.
  • hydrophilic or water-loving surfaces such as ceramic materials are, in the absence of water, oleophilic or oil loving.
  • the ink When fresh, unused, water-free lithographic ink is applied to a ceramic, the ink initially exhibits good adhesion to and wetting of the roller surface. Under these initial conditions, normal ink-metering performance is observed.
  • a condition is reached where a combination of roller nip pressure and increasing water content in the ink force water through the ink layer to the ceramic metering roller surface. By adhering preferentially to the rollers' surface, the water debonds the ink from that surface, thereby disallowing subsequent pickup of ink from the ink input means.
  • Fig. 6 of the drawings illustrates the manner in which the oleophilic and hydrophobic material is infused into the interstitial voids formed by the ceramic coating.
  • numeral 50 indicates generally the composite wear resistant layer
  • numeral 51 identifies the particles of ceramic material
  • numeral 52 the infused oleophilic and hydrophobic organic material.
  • the entire interconnecting network of voids formed by the deposited ceramic layer be infused substantially completely throughout the volume of the layer.
  • Best Water contact angle 90° or higher Ink Oil contact angle 10° or lower and spreading. Maybe Acceptable Water contact angle 80° or higher. Ink Oil contact angle 10° or lower and spreading. Probably Not Acceptable Water contact angle less than about 80° Ink Oil contact angle greater than 10° and/or non-spreading.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Laminated Bodies (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
EP19890124064 1989-04-27 1989-12-28 Rouleaux encreurs oléophiles hydrophobes et microporeux Expired - Lifetime EP0394560B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34506589A 1989-04-27 1989-04-27
US345065 1989-04-27

Publications (3)

Publication Number Publication Date
EP0394560A2 true EP0394560A2 (fr) 1990-10-31
EP0394560A3 EP0394560A3 (fr) 1991-01-30
EP0394560B1 EP0394560B1 (fr) 1994-12-07

Family

ID=23353341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890124064 Expired - Lifetime EP0394560B1 (fr) 1989-04-27 1989-12-28 Rouleaux encreurs oléophiles hydrophobes et microporeux

Country Status (5)

Country Link
EP (1) EP0394560B1 (fr)
JP (1) JP2617234B2 (fr)
AU (1) AU638222B2 (fr)
CA (1) CA2005580C (fr)
DE (2) DE68919830T2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10104164B4 (de) * 2001-01-30 2005-11-10 Nanogate Coating Systems Gmbh Gegenstand mit Versiegelung und dessen Verwendung in einer Druckmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043013A (en) * 1974-07-13 1977-08-23 Firma Felix Bottcher Transfer roller
US4301730A (en) * 1977-09-29 1981-11-24 Pamarco Incorporated Anilox roll and method of making the same
GB2049102A (en) * 1979-05-03 1980-12-17 Csi Corp Transfer roll
DE3316348C2 (de) * 1983-05-05 1985-03-07 PTG Plasma-Oberflächentechnik GmbH, 7240 Horb Verfahren zum Beschichten eines Werkstückes
JPS6044394A (ja) * 1983-08-22 1985-03-09 Mitsubishi Heavy Ind Ltd インキロ−ラ

Also Published As

Publication number Publication date
JP2617234B2 (ja) 1997-06-04
DE68919830T2 (de) 1995-06-01
CA2005580C (fr) 1995-07-18
EP0394560B1 (fr) 1994-12-07
DE394560T1 (de) 1991-02-28
CA2005580A1 (fr) 1990-10-27
AU4783390A (en) 1990-11-01
JPH02299888A (ja) 1990-12-12
AU638222B2 (en) 1993-06-24
EP0394560A3 (fr) 1991-01-30
DE68919830D1 (de) 1995-01-19

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