EP0395496B1 - Dem Licht aussetzbare Schicht mit einem Erkennungs- und Sicherheitszeichen und Verwendung einer solchen Schicht - Google Patents

Dem Licht aussetzbare Schicht mit einem Erkennungs- und Sicherheitszeichen und Verwendung einer solchen Schicht Download PDF

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Publication number
EP0395496B1
EP0395496B1 EP90401105A EP90401105A EP0395496B1 EP 0395496 B1 EP0395496 B1 EP 0395496B1 EP 90401105 A EP90401105 A EP 90401105A EP 90401105 A EP90401105 A EP 90401105A EP 0395496 B1 EP0395496 B1 EP 0395496B1
Authority
EP
European Patent Office
Prior art keywords
light
sheet
pigment
sheet according
paper
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.)
Expired - Lifetime
Application number
EP90401105A
Other languages
English (en)
French (fr)
Other versions
EP0395496B2 (de
EP0395496A2 (de
EP0395496A3 (de
Inventor
Gilles Clerc
François Rivat
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.)
CESSIONE;EUROPEAN PRINTED PRODUCTS S.N.C.
Original Assignee
EUROPEAN PRINTED PRODUCTS
ArjoWiggins SAS
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9381155&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0395496(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by EUROPEAN PRINTED PRODUCTS, ArjoWiggins SAS filed Critical EUROPEAN PRINTED PRODUCTS
Priority to AT90401105T priority Critical patent/ATE93776T1/de
Publication of EP0395496A2 publication Critical patent/EP0395496A2/de
Publication of EP0395496A3 publication Critical patent/EP0395496A3/de
Application granted granted Critical
Publication of EP0395496B1 publication Critical patent/EP0395496B1/de
Publication of EP0395496B2 publication Critical patent/EP0395496B2/de
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
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • 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
    • B41M3/06—Veined printings; Fluorescent printings; Stereoscopic images; Imitated patterns, e.g. tissues, textiles

Definitions

  • the invention relates to a decorative sheet usable for the manufacture of laminated panels, this sheet further comprising recognition and security means.
  • the invention further relates to a composition for printing such a sheet.
  • laminates have been used as materials in homes and commercial and industrial premises. Typical applications of such laminates are the surface coating of walls, table tops, furniture and the like.
  • the so-called high pressure laminates are produced from a core consisting of sheets impregnated with resin.
  • the sheets are generally sheets of kraft paper which has been impregnated with a thermosetting resin and more particularly with a phenolic resin.
  • the sheets are dried, cut, then stacked on top of each other.
  • the number of sheets in the stack depends on the applications and can vary between 3 and 9, but can be higher.
  • a decorative sheet which is generally a sheet of paper carrying a printed or light-colored pattern, and impregnated with a thermosetting resin which does not blacken with heat, for example melamine-formaldehyde resins, benzoguanamine-formaldehyde resins, unsaturated polyester resins.
  • a protective cover sheet without a pattern and transparent in the final laminate, is placed above the decorative sheet. In terms of profession, this protective sheet is called "over-lay".
  • the stack of impregnated sheets is then placed in a press fitted with a sheet giving the surface condition. The stack is then densified by heating and pressing to obtain a unitary structure.
  • thermosetting resins are transformed into thermosetting form and an extremely hard material with a decorative effect is obtained.
  • So-called low pressure laminates are produced in a similar manner to that of high pressure laminates, but the decorative sheet is laminated directly on a particle board or any other basic support.
  • the decorative sheet is traditionally made in the following manner.
  • a sheet of paper is made by draining on a flat canvas an aqueous suspension of cellulose fibers, long and / or short, bleached and / or unbleached, fillers, binders.
  • the sheet thus formed is drained, pressed and dried to form a sheet of paper.
  • This sheet is then printed.
  • the impression usually made is a gravure printing, by means of engraved rollers.
  • the engraving technique consists in making a drawing, for example reproducing a wood or a purely fancy artistic drawing.
  • one to five separate and successive prints are made using one to five rolls.
  • the invention therefore aims to solve this problem.
  • Another problem that arises is the identification of the laminate manufacturer. Indeed, the decorative sheet manufacturer can sell the same authentic sheet to several laminate manufacturers. Each laminate manufacturer generally bears his mark on the laminate, by means of a more or less removable label. Again, there is the problem of identifying the manufacturer of a particular laminate. The invention aims to solve this second problem.
  • An object of the invention is therefore to provide a decorative sheet for laminate panels, comprising means for recognizing the origin of the laminates.
  • the invention relates to a sheet usable for the manufacture of laminated panels, intended to be subjected to the prolonged action of light, characterized in that it comprises an impression at least resistant to light, this impression having a first shade in natural light and a second shade, different from the first, in artificial light.
  • the first design is invisible to natural light and the second design is visible to artificial light.
  • natural light is meant a light source whose wavelengths are between 400 and 700 nanometers and by artificial light, a light source whose wavelengths are less than 400 nanometers and greater than 700 nanometers.
  • pigments and dyes are luminescent. These materials are commonly called “phosphors". These pigments can be fluorescent or phosphorescent.
  • the color sensation produced by conventional pigments or dyes which are not luminescent results from the selective absorption of wavelengths in the visible part of the spectrum. Wavelengths that are not absorbed are reflected or transmitted, which gives the sensation of color. This feeling of color is absent when there is no visible light source, because there is no energy to reflect or transmit.
  • luminescent pigments do not reflect light, but they are themselves sources of light. They have the property of absorbing certain wavelengths, generally wavelengths less than 400 nanometers and invisible to the eye, and of transforming these wavelengths into visible wavelengths. The wavelengths thus emitted produce a sensation of color. When the emission of light continues for a non-negligible period of time, after the excitation energy source has been switched off, the material is said to be phosphorescent.
  • Pigments based on zinc sulfide have been described in the Kirk-Othmer documenet: Encyclopedia of Chemical Technology, 3rd ed, volume 17. These pigments are described as chemically stable.
  • Document EP-A-147252 describes a mixture of a luminescent substance and an anti-storage substance. Such a mixture can be used for marking documents to prevent counterfeiting, for example bank notes, fiduciary papers.
  • the compositions can be introduced onto paper and can be introduced into printing inks. These inks are fatty inks, that is to say containing an oil and the printing is done by offset or intaglio. So far, the problem of marking heat-resistant sheets that can be used to decorate laminates has never been posed.
  • Document AU-A-518,156 describes a sheet of paper comprising an at least light-resistant printing having a first light shade of wavelength between 400 and 700 nm and a second shade different from the first at the wavelength less than 400 nm, the impression being a heliographic impression. However, it is not a paper usable for the manufacture of laminates.
  • Document DE-A-2 910 176 describes a method for characterizing disc packaging using fluorescent printing.
  • GB-2,147,542 describes an article printed using fluorescent or synthetic material.
  • EP 0253 543 describes a printing ink comprising a metallic compound, a luminescent compound and one or more inert compounds. Such ink is used for credit cards.
  • an essential technical problem to be solved is the fact that the sheets are intended to be subjected to heat, for a period of several tens of minutes, or even several hours. Indeed, when it comes to laminate sheets, during densification, the sheet is subjected to temperatures of more than 100 ° C., for 20 minutes. Similarly, when manufacturing papers covered with metal or metallized, these papers are subjected to high temperatures, especially when hot stamping is carried out.
  • Marking sheets for example for laminates, also poses different and additional problems of marking paper for banknotes and other security documents.
  • the decorative sheets for laminates are necessarily impregnated with a thermosetting resin.
  • the impregnated sheet is placed on a particle board or a stack of impregnated kraft paper sheets. Then we press the assembly against a sheet.
  • a technical problem posed is that the prints must not transfer from the decorative sheet onto the sheet which must remain clean.
  • a second technical problem to be solved is that during the impregnation, the decorative sheet passes
  • thermosetting resin creeps under the action of heat and pressure and if it contains luminescent printing substances, these these flow together and cause smudging of the final impression.
  • the luminescent substances used have a very good resistance to light.
  • these sheets can be used for panels used as materials in homes and furniture tops and they are therefore intended to be subjected to the action of light for extended periods of time.
  • the Applicant has tried many luminescent substances sold on the market and has been able to find that those which are well suited are mineral pigments. Indeed, organic molecules are very sensitive to external conditions and degrade easily in light, as well as in heat.
  • the Applicant has been able to use mineral pigments having a very good resistance to light and resist high temperatures for long periods of time, namely temperatures above 100 ° C., preferably between 140 and 200 ° C., by example 140-150 ° C for at least 10 min to 2 hours, for example 20 to 30 minutes.
  • luminescent substances used according to the invention such as zinc sulfides or their mixture with other metallic sulfides are resistant to heat, for periods of time of more than 10 min.
  • the luminescent substances are pigments based on zinc sulfide in admixture with cadmium sulfide. These pigments can have a particle size of less than 40 micrometers.
  • Pigments of zinc sulfide or zinc sulfide and cadmium which are activated by copper can be used. Their preparation method is known and is for example described in H.W. Leverenz, An introduction to luminescence of solids: S. John, Wiley & Sons, Inc. New York, Chapman & Hall Ltd London, 1950.
  • Pigments based on zinc sulfide emitting in various wavelengths have been described in patent applications EP-A-34059, EP-A-78538, EP-A-91184 filed by the Japanese company KASEI OPTONIX. Pigments which are very suitable are also pigments based on zinc sulphide, manufactured by the German company RIEDEL DE HAEN.
  • mixtures of luminescent substances can be used, provided that they are resistant to light, heat, pressure, as mentioned above.
  • This mixture is applied to a sheet of white paper of 90 g / m2 by gravure printing.
  • the cylinder was etched by electronic etching, the cells having a depth of 37 micrometers, the height of the frame being 190 micrometers, and the width of the frame being 210 micrometers.
  • the size of the pigment particles is about 0.1 to 40 micrometers, which allows printing with such cells.
  • This sheet is subjected to a temperature of 160 ° C. by placing it between two hot plates for 15 minutes. Then we illuminate the paper with UV rays. The blue print appears again.
  • Example 2 The same mixture is made as in Example 1, but the mineral pigment is replaced by an organic pigment which is an N-substituted anthranilic acid of the type described in document DE-A-3225966.
  • the fluorescent print no longer appears.
  • Example 2 The same mixture is made as in Example 1, with pigments sold by the company OPTONIX, under different numbers.
  • the resistance to daylight is 3 to 6 measured according to the Wool scale test and the resistance to ultraviolet rays is 5 to 6.
  • the Wool scale test corresponds to standards NF T 51056 and NF T 51058. It consists in illuminating a sample comprising an impression with a Xenon lamp for 90 hours or 300 hours and in comparing the sample obtained with strands of wool with shades ranging from 1 to 8, the number 1 corresponding to color degradation, the number 8 corresponding to non-degradation.
  • Paper is printed by heliography, using one to five color prints in the traditional way. This paper is then decorated and has this decorative aspect and visible by lighting in natural light. A heliography printing is then carried out by carrying out one to three prints using the ink mixtures of Examples 1 to 9.
  • the initial design is not modified in natural light. When we illuminate the paper in ultra-violet light, the initial drawing disappears and it is the superimposed drawing that becomes visible.
  • the invention relates not only to a means of marking and recognizing sheets subjected to temperature, and / or to pressure and to light, for long periods of time, but also relates to a new means of decorating these sheets.
  • Polyvinyl chloride sheets can also be printed which are laminated to particle board by bonding and pressure. These plates used for furnishing must be resistant to light. It is also possible to print sheets of polyethylene, polypropylene, optionally coated and possibly impregnated with a resin.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Textile Engineering (AREA)
  • Vascular Medicine (AREA)
  • Laminated Bodies (AREA)
  • Road Signs Or Road Markings (AREA)
  • Pens And Brushes (AREA)
  • Printing Methods (AREA)
  • Toys (AREA)
  • Paper (AREA)

Claims (8)

1. Folie, die sich zur Herstellung von Schichtstoffen eignet und dazu bestimmt ist, einer längeren Einwirkung von Licht ausgesetzt zu sein, enthaltend einen Aufdruck, der mindestens lichtecht ist und eine erste Färbung beim Licht der Wellenlänge zwischen 400 und 700 Nanometer und eine zweite Färbung, die sich von der ersten unterscheidet, beim Licht der Wellenlänge unter 400 Nanometer und oberhalb 700 Nanometer darbietet, dadurch gekennzeichnet, daßderAufdruckein heliographischeraufdruck ist, der mit Hilfe einer flüssigen Tinte erfolgt, die mindestens ein lumineszierendes Pigment enthält, das während mindestens 10 Minuten gegenüber Temperaturen oberhalb von 100°C widerstandsfähig ist.
2. Folie gemäß Anspruch 1, dadurch gekennzeichnet, daß das Pigment 20 bis 30 Minuten gegenüber Temperaturen von 140 bis 200°C widerstandsfähig ist.
3. Folie gemäß einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß das Pigment ein Zinksulfid ist.
4. Folie gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Pigment mindestens ein Zinksulfid, ein zweites Metallsulfid und gegebenenfalls mindestens ein Aktivierungsmittel enthält.
5. Folie gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Pigment ein Gemisch aus Zinksulfid und Cadmiumsulfid ist, das durch Kupfer aktiviert ist.
6. Folie gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Pigment eine Echtheit gegenüber ultravioletten Strahlen von über 5 und vorzugsweise 6 besitzt.
7. Folie gemäß einem derAnsprüche 1 bis 6, dadurch gekennzeichnet, daß das Pigment eine Teilchengröße von unter 40 Mikrometer aufweist.
8. Folie gemäß einem derAnsprüche 1 bis 7, dadurch gekennzeichnet, daß sie aus Papier, Polyvinylchlorid, Polyethylen oder Polypropylen besteht und gegebenenfalls beschichtet und gegebenenfalls mit einem wärmehärtbaren Harz imprägniert ist.
EP90401105A 1989-04-26 1990-04-25 Dem Licht aussetzbare Schicht mit einem Erkennungs- und Sicherheitszeichen und Verwendung einer solchen Schicht Expired - Lifetime EP0395496B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90401105T ATE93776T1 (de) 1989-04-26 1990-04-25 Dem licht aussetzbare schicht mit einem erkennungs- und sicherheitszeichen und verwendung einer solchen schicht.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8905541 1989-04-26
FR8905541A FR2646378B1 (fr) 1989-04-26 1989-04-26 Feuille destinee a etre soumise a l'action de la lumiere, comportant des moyens de reconnaissance et de securite, et application d'une telle feuille

Publications (4)

Publication Number Publication Date
EP0395496A2 EP0395496A2 (de) 1990-10-31
EP0395496A3 EP0395496A3 (de) 1991-03-13
EP0395496B1 true EP0395496B1 (de) 1993-09-01
EP0395496B2 EP0395496B2 (de) 1998-01-14

Family

ID=9381155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401105A Expired - Lifetime EP0395496B2 (de) 1989-04-26 1990-04-25 Dem Licht aussetzbare Schicht mit einem Erkennungs- und Sicherheitszeichen und Verwendung einer solchen Schicht

Country Status (5)

Country Link
EP (1) EP0395496B2 (de)
AT (1) ATE93776T1 (de)
DE (1) DE69002997T3 (de)
ES (1) ES2045839T5 (de)
FR (1) FR2646378B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000079A1 (de) 2008-01-17 2009-07-30 Otger Terhürne, Holzwerk GmbH & Co. Nachleuchtendes Element eines Belages

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6395408B1 (en) 1996-06-28 2002-05-28 Pioneer Plastics Corporation Decorative laminate incorporating photoluminescent material
US20080268228A1 (en) 2007-04-27 2008-10-30 Panolam Industries International, Inc. Multi-colored decorative laminate

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2277169A (en) * 1938-08-02 1942-03-24 Joseph L Switzer Press process of making reproduction impresses and product thereof
US3011978A (en) * 1959-07-16 1961-12-05 Burroughs Corp Luminescent printing composition and method of making the same
DE2656831A1 (de) * 1976-12-15 1978-06-22 Westag & Getalit Ag Verfahren zur herstellung einer arbeitsplatte mit oberflaechenmuster
DE2910176A1 (de) * 1979-03-15 1980-09-25 Guenter Alt Verfahren und vorrichtung zur kennzeichnung von druckprodukten
US4652464A (en) * 1982-08-23 1987-03-24 Ludlum John P Printing fine art with fluorescent and non-fluorescent colorants
GB2147542A (en) * 1983-10-05 1985-05-15 Fade In Products Printed articles
GB8616878D0 (en) * 1986-07-10 1986-08-20 De La Rue Thomas & Co Ltd Coating compositions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000079A1 (de) 2008-01-17 2009-07-30 Otger Terhürne, Holzwerk GmbH & Co. Nachleuchtendes Element eines Belages

Also Published As

Publication number Publication date
ES2045839T5 (es) 1998-05-16
DE69002997D1 (de) 1993-10-07
ATE93776T1 (de) 1993-09-15
DE69002997T3 (de) 1998-03-26
FR2646378B1 (fr) 1994-11-25
DE69002997T2 (de) 1994-01-20
EP0395496B2 (de) 1998-01-14
ES2045839T3 (es) 1994-01-16
FR2646378A1 (fr) 1990-11-02
EP0395496A2 (de) 1990-10-31
EP0395496A3 (de) 1991-03-13

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