EP1870253A1 - Méthode pour décoration de surface - Google Patents

Méthode pour décoration de surface Download PDF

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Publication number
EP1870253A1
EP1870253A1 EP06425410A EP06425410A EP1870253A1 EP 1870253 A1 EP1870253 A1 EP 1870253A1 EP 06425410 A EP06425410 A EP 06425410A EP 06425410 A EP06425410 A EP 06425410A EP 1870253 A1 EP1870253 A1 EP 1870253A1
Authority
EP
European Patent Office
Prior art keywords
resin
support
decorative layer
temperature
thermosetting resin
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.)
Withdrawn
Application number
EP06425410A
Other languages
German (de)
English (en)
Inventor
Gilberto Menin
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.)
Menphis SpA
Original Assignee
Menphis SpA
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 Menphis SpA filed Critical Menphis SpA
Priority to EP06425410A priority Critical patent/EP1870253A1/fr
Publication of EP1870253A1 publication Critical patent/EP1870253A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/12—Transfer pictures or the like, e.g. decalcomanias
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/10—Applying flat materials, e.g. leaflets, pieces of fabrics
    • B44C1/105—Applying flat materials, e.g. leaflets, pieces of fabrics comprising an adhesive layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0415—Ornamental plaques, e.g. decorative panels, decorative veneers containing metallic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/043—Ornamental plaques, e.g. decorative panels, decorative veneers containing wooden elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/38—Intermediate layers; Layers between substrate and imaging layer

Definitions

  • the present invention relates to a process for surface decoration.
  • the present invention is addressed to the decoration of metal surfaces belonging to aluminium section members, sheet metals, sheet metal rolls known in the particular technical field as "coils", etc., to which a particular appearance is required to be given.
  • the present invention is also addressed to decoration of MDF surfaces, i.e. wooden surfaces made up of wood fibres or narrow bundles obtained through high-temperature thermomechanical grinding, bonded together with or without use of thermosetting adhesives and hot pressed.
  • the present invention is used for decorating metal door and window frames that must have a wood-like aesthetic appearance or reproduce particular chromatic fancy images.
  • the present invention is concerned with the decoration of surfaces by means of inks/paints having colouring pigments of sizes included between 0.5 and 10 microns that cannot be applied by means of the known sublimation techniques.
  • thermoadhesive/thermosetting resin a thermoadhesive/thermosetting resin onto the surface to be decorated.
  • the metal surface is electrostatically charged and introduced into a mist of powders of said thermosetting resin.
  • the resin under the action of the electrostatic field, lays onto the surface and becomes fixed thereto.
  • the surface is maintained to a temperature of about 100-130°C, to enable the resin to reveal and keep its thermoadhesive properties, and sprayed by means of a spray gun for example, with a colouring paint adhering to the resin itself.
  • the surface is then brought to a predetermined temperature of about 200°C, to which the resin polymerises retaining the colouring powders in a stable manner.
  • the just described known process is in any case a limiting process because it does not allow execution of particular patterns but it only enables colouring of the surfaces in a substantially uniform manner because laying of the individual paint pigments is quite random.
  • the transfer technique For application of patterns, use of the transfer technique is also known.
  • the pattern is originally positioned on a support, a layer of release material, of the waxy type for example, being interposed therebetween.
  • the support is associated with the surface to be decorated with the colouring pigments in contact with said surface.
  • the surface and support are brought to such a temperature (about 100-130°C) that detachment of the colouring layer from the support is caused through melting of the waxy layer, as well as transfer of same onto the surface.
  • the adhesion/clinging force of the dye or colouring material to the surface carried out by means of the transfer process is in any case weak, so that the colouring layer often separates from the surface itself.
  • the technical task of the present invention is to propose a process for surface decoration that is free from the above mentioned drawbacks.
  • Another aim of the present invention is to propose a process enabling sure application of decorations also when they are very complicated.
  • a surface to be decorated has been generally identified with reference numeral 1.
  • Surface 1 is preferably made of metal material such as steel or an aluminium alloy and for instance belongs to a section member, a flat section, a rolled section currently referred to as "coil", etc.
  • Surface 1 can also be a MDF surface, i.e. a wooden surface made up of wood fibres or narrow bundles obtained through high-temperature thermomechanical grinding, bonded together with or without use of thermosetting adhesives and hot pressed.
  • MDF surface i.e. a wooden surface made up of wood fibres or narrow bundles obtained through high-temperature thermomechanical grinding, bonded together with or without use of thermosetting adhesives and hot pressed.
  • thermosetting resin 2 is first applied to surface 1, the function of resin 2 being to form an anchoring substrate for the decoration.
  • thermosetting resin 2 is preferably selected from two-component resins comprising catalysts that can be activated to predetermined temperatures.
  • Thermosetting resins are cross-linked polymers that, once modelled to high temperatures, cannot be modified as regards their shape.
  • the main feature of same is their resistance to high temperatures.
  • thermosetting resins used are polyurethane powders, epoxy resins, polyamide resins, acrylic resins polyester resins, for example.
  • thermosetting resin 2 to surface 1 can be carried out following different methods, such as painting, spraying, coating, silk-screen printing, rotogravure, depending on the type of resin 2 used.
  • this application is of the electrostatic type.
  • the metal surface is electrostatically charged and introduced into a mist of powders of said thermosetting resin 2.
  • the resin powder under the action of the electrostatic field, lays onto the surface 1 and is provisionally fixed thereto.
  • surface 1 is previously made electrically conductive, by previously dipping said surface 1 into a solution of an electrically conductive material.
  • Fig. 1 When laying has been carried out (Fig. 1), surface 1 is heated to a temperature Tp so as to fix the resin 2 to surface 1 at least provisionally.
  • Tp The exact pre-heating temperature Tp depends on the resin used and is generally included between 100°C and 150°C.
  • heating is obtained by introducing the workpiece carrying surface 1 to be decorated into an oven, an infrared oven for example, of known type and as used in current painting processes.
  • a support 3 Before or during preparation of surface 1, a support 3 is to be provided which has an intermediate release layer 4, of the silicone, TeflonTM, paraffin type, and preferably of the waxy type, and at least one decorative layer 5 superposed on the waxy layer 4 (Fig. 1).
  • the intermediate layer 4 is capable of retaining the decorative layer 5 at room temperature and melting at temperatures included between 100°C and 150°C as specified below, so as to release the retained decorative layer 5.
  • the decorative layer 5 may contain one or more types of ink/paint and may represent the most different shapes and colours without any limitation.
  • the types of ink used are pigment inks, water inks or inks in a solvent and they are not sublimable.
  • the decorative layer 5 has colouring pigments 5a of sizes included between 0.5 and 10 microns.
  • the support 3 is preferably defined by a film of plastic or paper material.
  • the film is selected from the group consisting of polyesters, polyamides, polyethylene, polypropylene.
  • thermosetting resin 2 are preheated to the temperature Tp, so as to fix resin 2 to surface 1 at least temporarily.
  • surface 1 is drawn out of the oven and preferably cooled to enable cold coupling of same to the support 3.
  • the support 3 is positioned on surface 1 by bringing the decorative layer 5 into contact with the resin 2, which resin 2 has not yet been submitted to polymerisation or hardened (Figs. 2 and 3).
  • the support 2 temporarily adheres to surface 1 and, also when application has been completed, can be in any case shifted relative to said surface 1, so as to correct a possible positioning error.
  • the surface 1 and support 3 are therefore heated until causing separation of the decorative layer 5 from the support 3, adhesion of the decorative layer 5 to the thermosetting resin 2 and subsequent polymerisation and hardening of this resin 2 together with the decorative layer 5.
  • This heating too can be advantageously obtained by introduction of surface 1 and support 3 into an oven of known type.
  • heating is carried out in a first step, during which the surface 1 to be decorated and the support 3 are brought to a first temperature "T 1 ".
  • T 1 a first temperature
  • the resin 2 takes the above mentioned adhesive properties and the waxy layer 4 loses its consistency and releases the decorative layer 5. Therefore transfer of the decorative layer 5 to surface 1 occurs.
  • the parts of resin 2 not concerned with pigments 5a tend to increase their volume during polymerisation, while the parts of resin 2 covered with pigments 5a do not substantially increase their volume, generating therefore a decoration having different depth levels.
  • the second temperature “T 2 " is higher than the first temperature "T 1 ". Said temperatures “T 1 ", “T 2 " depend on the type of resin used.
  • the first temperature “T 1 " is included between 100°C and 150°C.
  • the second temperature “T 2 " is included between 160°C and 220°C.
  • Surface 1 and the transferred decorative layer 5 are preferably maintained to the second temperature "T 2 " for a period of time included between 5 and 30 minutes, depending on the selected temperature "T 2 ".
  • the decorated surface 1 can be advantageously submitted to a quality control.
  • the invention reaches the intended purposes and achieves important advantages.
  • the process of the invention allows also complicated and aesthetically high-quality decorations to be obtained, which decorations show an excellent adhesion/clinging of the paint/paints to the decorated surface.
  • the present process enables the percentage of decorated pieces with faults to be drastically reduced, because the quality control takes place before polymerisation of the resin and the decoration.
  • the process of the invention is also particularly advantageous even if compared with known sublimation techniques.
  • RAL powders/ paints can be used which are less expensive than the specific paints used for sublimation techniques.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP06425410A 2006-06-16 2006-06-16 Méthode pour décoration de surface Withdrawn EP1870253A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06425410A EP1870253A1 (fr) 2006-06-16 2006-06-16 Méthode pour décoration de surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06425410A EP1870253A1 (fr) 2006-06-16 2006-06-16 Méthode pour décoration de surface

Publications (1)

Publication Number Publication Date
EP1870253A1 true EP1870253A1 (fr) 2007-12-26

Family

ID=37607249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06425410A Withdrawn EP1870253A1 (fr) 2006-06-16 2006-06-16 Méthode pour décoration de surface

Country Status (1)

Country Link
EP (1) EP1870253A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3907974A (en) * 1973-11-08 1975-09-23 Dennison Mfg Co Curable decorating systems for glass or metal containers
GB1600115A (en) * 1976-06-28 1981-10-14 Bemrsoe Spendon Ltd Processes for applying designs to aluminium strip
US5976296A (en) * 1998-04-27 1999-11-02 American Trim, Llc Transfer printing of complex objects
WO2001049486A1 (fr) * 1999-12-30 2001-07-12 Mitsubishi Chemical America, Inc. Procede d'impression de substrat metalliques par transfert thermique et articles revetus d'une surface decorative correspondants
US20050150591A1 (en) * 2004-01-08 2005-07-14 Roscoe Manufacturing Corporation Method for applying images to surfaces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3907974A (en) * 1973-11-08 1975-09-23 Dennison Mfg Co Curable decorating systems for glass or metal containers
GB1600115A (en) * 1976-06-28 1981-10-14 Bemrsoe Spendon Ltd Processes for applying designs to aluminium strip
US5976296A (en) * 1998-04-27 1999-11-02 American Trim, Llc Transfer printing of complex objects
WO2001049486A1 (fr) * 1999-12-30 2001-07-12 Mitsubishi Chemical America, Inc. Procede d'impression de substrat metalliques par transfert thermique et articles revetus d'une surface decorative correspondants
US20050150591A1 (en) * 2004-01-08 2005-07-14 Roscoe Manufacturing Corporation Method for applying images to surfaces

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