WO2002092353A1 - Method of providing a marking on a substrate - Google Patents

Method of providing a marking on a substrate Download PDF

Info

Publication number
WO2002092353A1
WO2002092353A1 PCT/IB2002/001717 IB0201717W WO02092353A1 WO 2002092353 A1 WO2002092353 A1 WO 2002092353A1 IB 0201717 W IB0201717 W IB 0201717W WO 02092353 A1 WO02092353 A1 WO 02092353A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
substrate
ink
sol
marking
Prior art date
Application number
PCT/IB2002/001717
Other languages
French (fr)
Inventor
Mark F. Peeters
Jan A. Hovius
Dirk H. J. Teeuw
Ytsen Wielstra
Jolanda H. S. Winkel
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to KR10-2003-7000607A priority Critical patent/KR20030026320A/en
Publication of WO2002092353A1 publication Critical patent/WO2002092353A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0045—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by mechanical wave energy, e.g. ultrasonics, cured by electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams, or cured by magnetic or electric fields, e.g. electric discharge, plasma
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0054—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by thermal means, e.g. infrared radiation, heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0072—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using mechanical wave energy, e.g. ultrasonics; using magnetic or electric fields, e.g. electric discharge, plasma
    • 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
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5209—Coatings prepared by radiation-curing, e.g. using photopolymerisable compositions

Definitions

  • the invention relates to a method of providing a marking on a substrate which is provided with a curable coating.
  • tampon printing is often performed by means of tampon printing.
  • the advantage of tampon printing is that inks of many colors can be used. Tampon printing provides a very wide freedom in the use of colors, while in addition it is a comparatively inexpensive process.
  • a disadvantage is that tampon printing is an inflexible process as regards the shape of the substrate and of the image. The process can be used on substrates of planar shape, and also still of slightly curved shape. However, as soon as the substrate has a somewhat complicated three-dimensional shape, it becomes very difficult if not impossible to apply this process. Another method of applying markings or inscriptions involves the use of a laser.
  • the laser In laser marking, the laser can be controlled in any manner desired such that complicated surfaces can also be provided with markings.
  • Laser marking is a flexible process in that respect. The freedom of choice of colors, however, is very limited in laser marking. Only few colors can be used owing to the limited number of pigments in the coloring agent. Laser marking is mostly used for providing technical inscriptions, such as the type number of a device.
  • the invention is for this purpose characterized in that, after the provision of the coating on the substrate, an ink compatible with the coating is provided on said coating, which ink subsequently penetrates into the coating, whereupon finally the coating is cured.
  • a solution of the coating is provided on the substrate, for example by means of dip coating or spray coating.
  • an ink is provided on the still somewhat moist coating, which ink can penetrate into the coating. So the ink does not remain on the surface of the coating, but penetrates into it and after some time will lie entirely inside the coating. The moment the ink is provided has an influence on the quality of the marking. If the ink is provided on a coating which is too wet, the ink will flow out and a blurred image will be obtained.
  • the ink If the ink is provided after a too long waiting time, however, the ink will penetrate insufficiently into the coating.
  • the solvent of the solution of the coating must have been sufficiently removed before the ink is provided, so that flowing-out of the ink is prevented as much as possible. It is found then after curing that the ink can be easily removed.
  • the marking has a high degree of wear resistance because the coloring agents or pigments are present entirely inside the layer. The wear resistance is much greater than in the case of tampon printing.
  • the method is in fact suitable for inks of a wide variety of colors and can be implemented with various contactless spraying techniques, so that also 3D surfaces can be provided with images in a simple manner.
  • the coating is preferably dried before the ink is provided.
  • the optimum drying time is dependent on inter alia the type of coating and the type of image. If the image has large, even surfaces, a longer drying time will be necessary than if the image comprises thin lines or dots.
  • the drying time may be shorter in the case of drying at a higher temperature than at room temperature or in the case of forced drying (by air flow).
  • the ink is provided in an ink jet process, for example, by a thermal ink jet technology, but a piezo ink jet technology is alternatively also possible.
  • a normal spraying process could also be used.
  • the colorant of the ink comprises a dye.
  • inks with organic coloring agents or pigments may be used.
  • organic inks are readily available commercially.
  • inks containing inorganic pigments pigment dispersions may also be used. The choice depends on the type of coating and accordingly on the application of the substrate. If it is designed for use at high temperatures, the coating suitable for this will be cured at a high temperature, and inorganic pigments will have to be used for the dispersion.
  • Organic pigments may preferably be used for lower temperatures.
  • the inks or pigment dispersions may be water-based and/or alcohol-based, as long as they are compatible with the coating.
  • the coating is a sol-gel solution obtained in a sol-gel process, said sol-gel solution is a solution on the basis of tetraethylorthosilicate (TEOS) and 3-glycidyloxypropyltrimethoxysilane (GLYMO) which is provided on a polyamide substrate.
  • TEOS tetraethylorthosilicate
  • GLYMO 3-glycidyloxypropyltrimethoxysilane
  • Sol-gel solutions which are suitable for the provision of a marking or image in the manner described above are known from WO 98/13434 and WO 98/22548.
  • the coating is a sol-gel solution obtained in a sol-gel process
  • said sol-gel solution is a solution on the basis of tetraethylorthosilicate (TEOS) and methyltrimethoxysilane (MTMS) which is provided on an aluminum substrate.
  • TEOS tetraethylorthosilicate
  • MTMS methyltrimethoxysilane
  • the invention also relates to an implement with a wall portion formed by at least one substrate provided with a coating in which a marking was provided in accordance with the method described above.
  • the sol-gel layer has a thickness of approximately 10 ⁇ m.
  • the ink used is a normal commercially available ink (for example from HP).
  • the drying time at room temperature is approximately 20 minutes. Curing takes place at a temperature of approximately 160 °C.
  • the image on the substrate showed a high wear resistance and was resistant to alcohol and MEK (methylethyl ketone).
  • This example starts with an aluminum substrate such as may be used for the sole plate of an electric ion.
  • the substrate should accordingly be suitable for use at elevated temperatures (350 °C).
  • a sol-gel solution on the basis of TEOS (tetraethylorthosilicate) and MTMS (methyltrimethoxysilane) is provided on the aluminum substrate.
  • the ink used is a water-based Fe 2 O 3 pigment dispersion.
  • the drying time at room temperature is approximately 20 minutes.
  • the ink is provided by an ink jet technology. Curing takes place at a temperature of approximately 350 °C.
  • the image obtained complies fully with the wear resistance requirements.
  • the pigments in the image retain their color after exposure to high temperatures (350 °C) for long periods.
  • the material of the substrate used is an acrylonitril-butadieen- styreen copolymer (ABS).
  • a blank UN curable coating (Belticure matted UN-lacquer A.5.F.1 / LK.l 1763 (Schaepman)) was used. This coating is acrylate based.
  • the ink used in this example is obtained by solving a black dye in ethyl alcohol. The ink was printed on the uncured coating using an inkjet printer. The coating was cured after the ink was allowed to diffuse for 15 minutes. It was cured using an Actiprint UN tunnel. After the coating was cured the marking had a high abrasion resistance and was resistant to ethyl alcohol.
  • Example 4 the material of the substrate used is an an acrylonitril- butadieen-styreen copolymer (ABS).
  • a blank UN curable coating (UV-lacquer 1322 995 88326 (Eques)) was used. This coating is acrylate based. To insure good adhesion between the coating and the substrate, the coating was left 10 minutes before the ink was applied on the coating.
  • the ink used in this example is obtained by solving a black dye in ethyl alcohol. The ink was printed on the uncured coating using an inkjet printer. The coating was cured 30 seconds after printing. It was cured using an Actiprint UN tunnel. After the coating was cured the marking had a high abrasion resistance and was resistant to ethyl alcohol.

Abstract

Method of applying a marking or image on a substrate which is provided with a curable coating. After the application the coating on the substrate, an ink which is compatible with the coating is applied on the wet coating. The ink penetrates into the coating and then cured.

Description

Method of providing a marking on a substrate
The invention relates to a method of providing a marking on a substrate which is provided with a curable coating.
The provision of markings or images on the substrate mentioned above is often performed by means of tampon printing. The advantage of tampon printing is that inks of many colors can be used. Tampon printing provides a very wide freedom in the use of colors, while in addition it is a comparatively inexpensive process. A disadvantage is that tampon printing is an inflexible process as regards the shape of the substrate and of the image. The process can be used on substrates of planar shape, and also still of slightly curved shape. However, as soon as the substrate has a somewhat complicated three-dimensional shape, it becomes very difficult if not impossible to apply this process. Another method of applying markings or inscriptions involves the use of a laser. In laser marking, the laser can be controlled in any manner desired such that complicated surfaces can also be provided with markings. Laser marking is a flexible process in that respect. The freedom of choice of colors, however, is very limited in laser marking. Only few colors can be used owing to the limited number of pigments in the coloring agent. Laser marking is mostly used for providing technical inscriptions, such as the type number of a device.
It is an object of the invention to provide a method by which a marking is provided on a coating of a substrate which affords a high degree of freedom in color choice, which method is flexible as regards its use on complicated shapes of the substrate and of the image, while the marking or image obtained has a high resistance to wear and resistant to chemicals, like ethyl alcohol.
The invention is for this purpose characterized in that, after the provision of the coating on the substrate, an ink compatible with the coating is provided on said coating, which ink subsequently penetrates into the coating, whereupon finally the coating is cured. A solution of the coating is provided on the substrate, for example by means of dip coating or spray coating. Then an ink is provided on the still somewhat moist coating, which ink can penetrate into the coating. So the ink does not remain on the surface of the coating, but penetrates into it and after some time will lie entirely inside the coating. The moment the ink is provided has an influence on the quality of the marking. If the ink is provided on a coating which is too wet, the ink will flow out and a blurred image will be obtained. If the ink is provided after a too long waiting time, however, the ink will penetrate insufficiently into the coating. The solvent of the solution of the coating must have been sufficiently removed before the ink is provided, so that flowing-out of the ink is prevented as much as possible. It is found then after curing that the ink can be easily removed. The marking has a high degree of wear resistance because the coloring agents or pigments are present entirely inside the layer. The wear resistance is much greater than in the case of tampon printing. The method is in fact suitable for inks of a wide variety of colors and can be implemented with various contactless spraying techniques, so that also 3D surfaces can be provided with images in a simple manner.
The coating is preferably dried before the ink is provided. The optimum drying time is dependent on inter alia the type of coating and the type of image. If the image has large, even surfaces, a longer drying time will be necessary than if the image comprises thin lines or dots. The drying time may be shorter in the case of drying at a higher temperature than at room temperature or in the case of forced drying (by air flow).
Preferably, the ink is provided in an ink jet process, for example, by a thermal ink jet technology, but a piezo ink jet technology is alternatively also possible. A normal spraying process could also be used.
The colorant of the ink comprises a dye. Also inks with organic coloring agents or pigments may be used. The advantage of organic inks is that they are readily available commercially. But inks containing inorganic pigments (pigment dispersions) may also be used. The choice depends on the type of coating and accordingly on the application of the substrate. If it is designed for use at high temperatures, the coating suitable for this will be cured at a high temperature, and inorganic pigments will have to be used for the dispersion. Organic pigments may preferably be used for lower temperatures. The inks or pigment dispersions may be water-based and/or alcohol-based, as long as they are compatible with the coating. It is also possible to use a substrate which already comprises another coating or coatings applied before the coating on which the ink is provided. These coatings must of course be compatible with each other. In a preferred method of the invention the coating is a sol-gel solution obtained in a sol-gel process, said sol-gel solution is a solution on the basis of tetraethylorthosilicate (TEOS) and 3-glycidyloxypropyltrimethoxysilane (GLYMO) which is provided on a polyamide substrate. Sol-gel solutions which are suitable for the provision of a marking or image in the manner described above are known from WO 98/13434 and WO 98/22548.
In another preferred method of the invention the coating is a sol-gel solution obtained in a sol-gel process, said sol-gel solution is a solution on the basis of tetraethylorthosilicate (TEOS) and methyltrimethoxysilane (MTMS) which is provided on an aluminum substrate.
The invention also relates to an implement with a wall portion formed by at least one substrate provided with a coating in which a marking was provided in accordance with the method described above.
The invention will be explained with reference to examples.
Example 1
This example starts with a substrate made of polyamide (IXEF from the Solvay company) which may form part of a domestic appliance or a personal care appliance, such as an electric shaver, a toothbrush, etc. A sol-gel solution on the basis of TEOS
(tetraethylorthosilicate) and GLYMO (3-glycidyloxypropyltrimethoxysilane) is provided on the substrate. The sol-gel layer has a thickness of approximately 10 μm. The ink used is a normal commercially available ink (for example from HP). The drying time at room temperature is approximately 20 minutes. Curing takes place at a temperature of approximately 160 °C. The image on the substrate showed a high wear resistance and was resistant to alcohol and MEK (methylethyl ketone).
Example 2
This example starts with an aluminum substrate such as may be used for the sole plate of an electric ion. The substrate should accordingly be suitable for use at elevated temperatures (350 °C). A sol-gel solution on the basis of TEOS (tetraethylorthosilicate) and MTMS (methyltrimethoxysilane) is provided on the aluminum substrate. The ink used is a water-based Fe2O3 pigment dispersion. The drying time at room temperature is approximately 20 minutes. The ink is provided by an ink jet technology. Curing takes place at a temperature of approximately 350 °C. The image obtained complies fully with the wear resistance requirements. The pigments in the image retain their color after exposure to high temperatures (350 °C) for long periods.
Example 3
In this example the material of the substrate used is an acrylonitril-butadieen- styreen copolymer (ABS). A blank UN curable coating (Belticure matted UN-lacquer A.5.F.1 / LK.l 1763 (Schaepman)) was used. This coating is acrylate based. The ink used in this example is obtained by solving a black dye in ethyl alcohol. The ink was printed on the uncured coating using an inkjet printer. The coating was cured after the ink was allowed to diffuse for 15 minutes. It was cured using an Actiprint UN tunnel. After the coating was cured the marking had a high abrasion resistance and was resistant to ethyl alcohol.
Example 4 In this example the material of the substrate used is an an acrylonitril- butadieen-styreen copolymer (ABS). A blank UN curable coating (UV-lacquer 1322 995 88326 (Eques)) was used. This coating is acrylate based. To insure good adhesion between the coating and the substrate, the coating was left 10 minutes before the ink was applied on the coating. The ink used in this example is obtained by solving a black dye in ethyl alcohol. The ink was printed on the uncured coating using an inkjet printer. The coating was cured 30 seconds after printing. It was cured using an Actiprint UN tunnel. After the coating was cured the marking had a high abrasion resistance and was resistant to ethyl alcohol.

Claims

CLAIMS:
1. A method of providing a marking on a substrate which is provided with a curable coating, characterized in that, after the provision of the coating on the substrate, an ink compatible with the coating is provided on said coating, which ink subsequently penetrates into the coating, whereupon finally the coating is cured.
2. A method as claimed in claim 1, characterized in that the coating is preliminarily dried before the ink is applied.
3. A method as claimed in claim 1 or 2, characterized in that the ink is provided by means of an ink j et process.
4. A method as claimed in claim 1, 2, or 3, characterized in that the ink used is a water-based and/or alcohol-based ink.
5. A method as claimed in any one of the claims 1 to 4, characterized in that colorant of the ink comprises a dye, an organic or inorganic pigments or a combination thereof.
6. A method as claimed in any one of the claims 1 to 5, characterized in that the coating is a thermal curable coating.
7. A method as claimed in any one of the claims 1 to 5, characterized in that the coating is a UN curable coating.
8. A method as claimed in any one of the claims 1 to 5, characterized in that the coating is cured by air.
9. A method as claimed in any one of the claims 1 to 8, characterized in that the substrate is a polymer.
10. A method as claimed in any one of the claims 1 to 8, characterized in that the material of the substrate is a metal.
11. A method as claimed in any one of the claims 1 to 8, characterized in that the material of the substrate is a ceramic.
12. A method as claimed in any one of the claims 1 to 8, characterized in that the material of the substrate is wood.
13. A method as claimed in any one of the claims 1 to 8, characterized in that the material of the substrate is glass.
14. A method as claimed in any one of the claims 1 to 5, characterized in that the coating is a sol-gel solution obtained in a sol-gel process, said sol-gel solution is a solution on the basis of tetraethylorthosilicate (TEOS) and 3-glycidyloxypropyltrimethoxysilane (GLYMO) which is provided on a polyamide substrate.
15. A method as claimed in any one of the claims 1 to 5, characterized in that the coating is a sol-gel solution obtained in a sol-gel process, said sol-gel solution is a solution on the basis of tetraethylorthosilicate (TEOS) and methyltrimethoxysilane (MTMS) which is provided on an aluminum substrate.
16. An implement having a wall portion formed by at least one substrate provided with a coating in which a marking is provided by a method as claimed in any one of the preceding claims.
PCT/IB2002/001717 2001-05-17 2002-05-16 Method of providing a marking on a substrate WO2002092353A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-2003-7000607A KR20030026320A (en) 2001-05-17 2002-05-16 Method of providing a marking on a substrate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01201858.6 2001-05-17
EP01201858 2001-05-17

Publications (1)

Publication Number Publication Date
WO2002092353A1 true WO2002092353A1 (en) 2002-11-21

Family

ID=8180325

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/001717 WO2002092353A1 (en) 2001-05-17 2002-05-16 Method of providing a marking on a substrate

Country Status (3)

Country Link
KR (1) KR20030026320A (en)
CN (1) CN1463228A (en)
WO (1) WO2002092353A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142579A (en) * 1983-05-13 1985-01-23 Canon Kk Curing printed images
EP0775596A1 (en) * 1995-11-22 1997-05-28 E.I. Du Pont De Nemours And Company Process for providing durable images on a printed medium
US5989771A (en) * 1995-06-27 1999-11-23 Kimoto Co., Ltd. Ink jet recording materials
EP1010539A1 (en) * 1998-12-18 2000-06-21 Eastman Kodak Company Ink jet printing process
WO2001034402A1 (en) * 1999-11-09 2001-05-17 Koninklijke Philips Electronics N.V. Method of providing a marking on a substrate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142579A (en) * 1983-05-13 1985-01-23 Canon Kk Curing printed images
US5989771A (en) * 1995-06-27 1999-11-23 Kimoto Co., Ltd. Ink jet recording materials
EP0775596A1 (en) * 1995-11-22 1997-05-28 E.I. Du Pont De Nemours And Company Process for providing durable images on a printed medium
EP1010539A1 (en) * 1998-12-18 2000-06-21 Eastman Kodak Company Ink jet printing process
WO2001034402A1 (en) * 1999-11-09 2001-05-17 Koninklijke Philips Electronics N.V. Method of providing a marking on a substrate

Also Published As

Publication number Publication date
KR20030026320A (en) 2003-03-31
CN1463228A (en) 2003-12-24

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