WO2012155156A2 - Procédé d'impression sur aluminium anodisé - Google Patents

Procédé d'impression sur aluminium anodisé Download PDF

Info

Publication number
WO2012155156A2
WO2012155156A2 PCT/ZA2012/000025 ZA2012000025W WO2012155156A2 WO 2012155156 A2 WO2012155156 A2 WO 2012155156A2 ZA 2012000025 W ZA2012000025 W ZA 2012000025W WO 2012155156 A2 WO2012155156 A2 WO 2012155156A2
Authority
WO
WIPO (PCT)
Prior art keywords
printing
anodised aluminium
sheet
film
anodised
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.)
Ceased
Application number
PCT/ZA2012/000025
Other languages
English (en)
Other versions
WO2012155156A3 (fr
Inventor
Howard Alan LUNDIE
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2012155156A2 publication Critical patent/WO2012155156A2/fr
Publication of WO2012155156A3 publication Critical patent/WO2012155156A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0058—Digital printing on surfaces other than ordinary paper on metals and oxidised metal surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing

Definitions

  • This invention relates to a method of printing on anodised aluminium, and to apparatus for printing on anodised aluminium.
  • Aluminium and Aluminium based alloys are commonly used for signs, labels and asset tags.
  • a number of processes are known for printing on Aluminium, and specifically on anodised aluminium, the surface of which comprises an open pore oxide layer, capable of absorbing the printing medium during the printing process.
  • variable data is required to be printed- for example barcodes on asset tags
  • the screen printing method is not ideal, as a new screen is required for each new barcode. It is an object of this invention to provide a method of printing on anodised aluminium and apparatus for printing on anodised Aluminium which, at least partially, alleviates some of the abovementioned problems.
  • Inkjet technology may be used to print the image onto the sheet of anodised aluminium.
  • the ink is preferably a pigment-based ink.
  • the solid micro particles of pigment in the pigment-based ink are too large to enter the anodised pores of the anodised aluminium, and remain as a film on top of the sheet, sealing off the anodised pores below. It is preferable for the pigment-based ink to comprise carbon particles and for the film of solid micro-particles to be a carbon film.
  • the polymer solution may include any inert polymer such as, but not limited to a polyurethane or acrylic polymer dissolved in an appropriate solvent, such as ethanol, isopropanol, benzene or acetone.
  • an appropriate solvent such as ethanol, isopropanol, benzene or acetone.
  • Coating the anodised sheet with the polymer seals off the remaining exposed porous areas, not covered by the solid micro-particles.
  • Removal of the film of micro-particles once the polymer film has dried may be accomplished by wiping the film of micro-particles off with water or suitable solvent, thus exposing the pores that were previously sealed off by the micro-particles.
  • the sheet may then be soaked in a bath of anodising dye as known in the art, allowing the exposed pores to be dyed.
  • the polymer film may be removed using a relevant solvent such as acetone or thinners, and the dyed sheet may be sealed by one of a number of means known in the art.
  • the dyed sheet is sealed by immersing in hot water, which causes the anodised pores to close.
  • the invention also extends to apparatus for printing on anodised aluminium, the apparatus including at least two of the following: means for applying a liquid suspension of solid micro- particles onto the porous surface of a sheet of anodised aluminium, means for applying a polymer film to the printed sheet of anodised aluminium, means for removing the micro-particle film from the top of the porous surface once the polymer film has dried, and means for exposing the sheet to anodising dye.
  • the suspension of solid micro-particles is preferably a suspension of pigment-based ink, further preferably a carbon ink, and the apparatus for applying the pigment-based ink is preferably an inkjet printer.
  • the polymer film may be applied by one of a number of means, including dipping the sheet into the diluted polymer, or spraying a fine film of polymer solution over the sheet.
  • the drying means may include hot air blowers or infrared heaters
  • the micro-particle film may be removed using one or more of a number of means, including a damp cloth, a soft scourer, a buffing machine or a high pressure jet.
  • the means for exposing the sheet to anodising dye may include an anodising dye bath. It is preferable for the bath to be heated.
  • At least a part of the process is automated, and a conveyor system may be employed to move the anodised sheets through at least the first stages of the process.
  • a conveyor system may be employed to move the anodised sheets through at least the first stages of the process.
  • an inkjet printer will be employed to apply a carbon ink to the anodised sheets before they are conveyed through a dryer to dry the film of carbon particles, a spray coater for applying a polymer film, another dryer and a high pressure sprayer for removal of the carbon film.
  • the sheets may then be moved to an anodising bath for dying prior to removal of the polymer film by application of a solvent and finally sealing of the dyed sheet.
  • the invention further extends to anodized aluminium work pieces produced in accordance with the above process.
  • Figure 1 is a flow diagram, showing the steps of the process
  • Figure 2 is a representation of an anodised sheet to which the ink has been applied
  • Figure 3 is a representation of the anodised sheet to which the polymer film has been applied;
  • Figure 4 is a representation of the anodised sheet from which the ink has been removed.
  • the printing process includes the following steps; Printing an image directly onto the porous surface of a sheet of anodised aluminium using a pigment-based ink and ink jet technology.
  • the solid micro-particles of pigment 10 in the pigment based ink are approximately 0.05 to 0.2 micro meter in diameter, and as such are too large to enter the anodised pores 12 of the anodised aluminium sheet 14 which are approximately 100 to 250 angstroms in diameter.
  • the micro-particles of pigment 10 remain as a film on the surface of the anodised sheet 14, sealing off the anodised pores 12 below.
  • the pigment ink is a carbon ink, as carbon does not bond with the polymer film.
  • the ink used will ordinarily be black; Allowing the liquid portion of the ink 16 to be absorbed into the porous surface, and allowing the pigment remaining behind on the surface of the sheet to dry leaving a film of pigment 10 on top.
  • the liquid portion 16 comprises water, alcohol and other chemicals including glycerine, surfactants and anti-fungal agents; Coating the sheet with a polymer solution 18.
  • the polymer solution may include any inert polymer such as polyurethane or acrylic polymer dissolved in an appropriate solvent, such as ethanpl, isopropanol, benzene or acetone.
  • the polymer solution should comprise a polymer that is capable of temporarily sealing the exposed pores, while also being removable with the aid of a suitable solvent when required. In addition the polymer should cross-link when drying.
  • the above process can additionally be combined with a screen print process as known in the art where relevant, for instance, where it is required to print multiple colours.
  • the variable data such as bar codes can be printed using the technology of the invention, while the fixed data, such as a corporate logo can be printed using known screen printing technology.
  • the invention therefore provides a novel process for printing on anodised aluminium.

Landscapes

  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Printing Methods (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

L'invention concerne un procédé d'impression pour imprimer une image directement sur la surface poreuse d'une feuille d'aluminium anodisé, le procédé consistant à déposer une encre directement sur la surface poreuse d'une feuille d'aluminium anodisé pour former une image imprimée, à sécher l'encre, laissant un film de microparticules solides sur la surface de la feuille d'aluminium anodisé, à revêtir la feuille d'une solution polymère filmogène, et à laisser sécher, à retirer le film de microparticules solides de la partie supérieure de la surface poreuse et à exposer la feuille à un colorant d'anodisation.
PCT/ZA2012/000025 2011-05-10 2012-04-25 Procédé d'impression sur aluminium anodisé Ceased WO2012155156A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA201103389 2011-05-10
ZA2011/03389 2011-05-10

Publications (2)

Publication Number Publication Date
WO2012155156A2 true WO2012155156A2 (fr) 2012-11-15
WO2012155156A3 WO2012155156A3 (fr) 2013-06-13

Family

ID=47140062

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2012/000025 Ceased WO2012155156A2 (fr) 2011-05-10 2012-04-25 Procédé d'impression sur aluminium anodisé

Country Status (1)

Country Link
WO (1) WO2012155156A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104827790A (zh) * 2015-05-28 2015-08-12 阳江市科耐尔实业有限公司 一种烤花刀的制备方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339500A2 (fr) * 1976-01-27 1977-08-26 Duminil Franck Panneau decoratif en aluminium traite et procede de preparation
ES452499A1 (es) * 1976-10-05 1978-04-01 Brugarolas Sa Procedimiento para colmatar peliculas obtenidas por oxida- cion anodica sobre el aluminio y sus aleaciones.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104827790A (zh) * 2015-05-28 2015-08-12 阳江市科耐尔实业有限公司 一种烤花刀的制备方法
CN104827790B (zh) * 2015-05-28 2017-08-18 阳江市科耐尔实业有限公司 一种烤花刀的制备方法

Also Published As

Publication number Publication date
WO2012155156A3 (fr) 2013-06-13

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