WO2003101755A1 - Moyen d'authentification - Google Patents

Moyen d'authentification Download PDF

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Publication number
WO2003101755A1
WO2003101755A1 PCT/EP2003/005559 EP0305559W WO03101755A1 WO 2003101755 A1 WO2003101755 A1 WO 2003101755A1 EP 0305559 W EP0305559 W EP 0305559W WO 03101755 A1 WO03101755 A1 WO 03101755A1
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WO
WIPO (PCT)
Prior art keywords
article
region
colorant
film
transparent
Prior art date
Application number
PCT/EP2003/005559
Other languages
English (en)
Inventor
Christopher Regan
Original Assignee
Ucb, S.A.
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 Ucb, S.A. filed Critical Ucb, S.A.
Priority to AU2003237695A priority Critical patent/AU2003237695A1/en
Publication of WO2003101755A1 publication Critical patent/WO2003101755A1/fr

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B19/00—Cameras
    • G03B19/02—Still-picture cameras
    • G03B19/12—Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B42D2035/36—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light

Definitions

  • the present invention relates to security features used to authenticate an article such as a security document comprising a transparent substrate for example a polymer film.
  • a luminescent additive can be incorporated into a polymer film at the time of manufacture so the film will luminescence under an ultra-violet light source to identify the film.
  • incorporating such additives into the film can cause problems as the additive can migrate to the film surface causing blooming. This can adversely effect the surface properties of the film such as its reception to coating and/or its printability.
  • GB 2,300,596 (Portals Ltd) describes a fluorescent security feature in a transparent film (whether in a coating or in the film substrate) which consists of two materials which fluoresce under UV light at different wavelengths. The materials are located in different layers with a UV absorber positioned between these layers. The film is designed to have a different appearance in UV transmitted and reflected light and also exhibits a different appearance depending on which film surface is viewed. This teaches away from the present invention where a window on the film contains UV fluorescent material, and this window is used to view another UV fluorescent security feature positioned in another region of the film so the fluorescent colours combine.
  • the intermediate layer of UV absorber described in '596 would block any such combination or interaction between two UV-fluorescent layers and indeed is designed to do so. Examples of films described in this document are shown schematically in Figures 11 , 12 and 13 herein.
  • the dye fluoresces when irradiated with light of wavelength between 200 nm and 1000 nm to provide a readily verifiable effect of light piping from the edge of the film when the film is irradiated.
  • This document requires that the dye must be located within a laminate sandwich and away from the substrate edge (e.g. see Example 1 , page 9, line 26) to create the best light piping effect.
  • Using two different UV absorbers is not suggested.
  • a laminate structure also teaches away from using more flexible non laminated substrates and thus from self-authentication using a window. Examples of films described in this document are shown schematically in Figures 14 and 15 herein.
  • the window optionally contains an optical variable device such as a Moire pattern or diffraction grating added to the window using a transfer foil.
  • EP 0388090 (De La Rue) describes a sheet with a transparent window as a security device made for example by partially over printing a transparent substrate.
  • the window is used so features printed on the reverse side of the sheet can be seen in register through the window as means to deter counterfeiting and copying.
  • WO 00/41159 (UCB) describes a self-verifying label or article which contains a window used to authenticate a differently located security feature.
  • the present invention may also encompass semi- overt and/or covert features where it would be acceptable to use additional equipment to authenticated the film if necessary. It is not a disadvantage for the security device of the present invention to be hidden from a casual user as the feature may then also remain undisclosed to a counterfeiter (and so not be so readily coped).
  • article includes security documents.
  • an article comprising a first region having a first colorant and transparent second region having a second colorant, where the respective first and second colorants luminesce at different visible wavelengths when excited by excitation means, and where the first and second regions can be overlapped to with one another by manipulation of the article and/or document to form an overlap region between the first and second regions such that when the article is excited, the combined luminescence of both the first and the second colorants is seen through that part of transparent second region which defines the overlap region.
  • a further embodiment of the present invention provides an article comprising a first portion and transparent second portion comprising respectively first and second colorants which fluoresce at different visible wavelengths when irradiated by exciting radiation at separate (preferably non-visible, more preferably UV) wavelengths, the first and second portions being capable of being brought to register with on another by manipulation of the article or document such that when the first portion is irradiated with the exciting radiation through the transparent second portion, the combined fluorescence of both the first and second colorants can be observed through the transparent second portion.
  • first and second portions being capable of being brought to register with on another by manipulation of the article or document such that when the first portion is irradiated with the exciting radiation through the transparent second portion, the combined fluorescence of both the first and second colorants can be observed through the transparent second portion.
  • Another embodiment of the present invention provides a method for authenticating an article comprising a first region having a first colorant and transparent second region having a second colorant, where the respective first and second colorants luminesce at different visible wavelengths when excited by excitation means, the method comprising the steps of:
  • Yet another embodiment of the present invention provides a method of authenticating a product comprising the steps of: (a) positioning into register a first and second portion of an article comprising respectively a first and second colorants which fluoresce at different visible wavelengths when irradiated as different non-visible wavelengths;
  • the excitation means comprises exciting radiation, more preferably at separate wavelengths for each colorant.
  • the wavelength of each exciting radiation is non-visible, such as UV radiation for example of wavelength 254 nm and/or 365 nm.
  • the exciting radiation for the first colorant may substantially passes through the transparent second region. More conveniently the same source of radiation (but not necessarily the same wavelength) provides the exciting radiation for both the first and the second colorants. Most conveniently both the first and second colorants are excited substantially simultaneously throughout the overlap region.
  • the first colorant throughout the overlap region is excited by the luminescent radiation emitted from the excited second colorant after said radiation passes through the transparent second region.
  • luminescence denotes any emission of visual radiation from an electronically excited state of a material. Luminescence thus encompasses (among other things) both fluorescence and phosphorescence.
  • fluorescence is where the excited state is an unstable singlet from which radiative decay to the ground state occurs very rapidly through an allowed transition. Delayed fluorescence via other routes (such as E-type, P-type and/or recombination fluorescence) may also be possible.
  • An example of phosphorescence is where the excited state is a more stable triplet from which radiative decay to the ground state occurs less rapidly via an intermediate species as the direct radiative path is a forbidden transition.
  • the excited state which luminesces may be formed by any suitable means, most usually by excitation with any suitable radiation, such as high energy invisible UV (photo-luminescence), X-rays (radio-luminescence), electrons (cathodo-luminescence); infra-red radiation (up-conversion); and/or any suitable combinations thereof.
  • any convenient excitation means may be used to obtain a population of excited state.
  • a non exhaustive list of some non-radiative excitation methods includes any of the following and any suitable combinations thereof: chemical reaction (chemi-luminescence - such as peroxide decomposition, singlet oxygen, ion radical and/or electron transfer [e.g. electrochemi-luminescence]); biological process(es) (bio-luminescence); strong electric field (electro-luminescence); and/or stress (tribo-luminescence).
  • the preferred mode(s) of luminescence used in the present invention are fluorescence and/or phosphorescence, more preferably that induced by irradiating with exciting radiation, most preferably by radiation within the UV region.
  • the excitation means is non-destructive of the article and/or document which incorporates the luminescent material(s).
  • the excitation means is non-destructive of the article and/or document which incorporates the luminescent material(s).
  • methods to produce luminescence which require sampling of material, use of highly reactive species, excessive heating, and/or irradiation at excessively high flux densities and/or energies are not generally preferred.
  • UV radiation denotes electromagnetic radiation having a wavelength from about 350 nm to about 750 nm.
  • UV radiation denotes electromagnetic radiation having a wavelength from about 100 nm to about 400 nm.
  • UV-radiation includes the sub regions of UV-A (320 nm to 400 nm), UV-B (290 nm to 320nm) and UV-C (100 nm to 290 nm). It can be seen there is a slight overlap between the visible and UV-A regions of the electromagnetic spectrum. As the context dictates the terms UV-A, UV-B and UV-C are also used herein to denote that a specific wavelength of UV radiation falls within these regions as well as denoting the regions themselves.
  • UV-A The UV in normal sunlight is mostly UV-A with some UV-B and little or no UV-C. Radiation at smaller UV wavelengths is partially (UV-B) and almost completely (UV-C) absorbed by ozone present in the upper atmosphere. Therefore although sunlight alone may be sufficient to produce luminescence, depending on the luminescent material there may also be a need for additional artificial source(s) of UV light to excite strong luminescence (i.e. that which is easily visible in daylight).
  • the UV source which excites luminescence can emit a broad spectrum of wavelengths including those wavelengths desired, or can be tuned to emit only those wavelength(s) which are required to excite the selected luminescent materials(s). Wavelengths of 365 nm (UV-A) and 254 nm (UV-C) are those typically used to detect counterfeiting as they are present in conventional UV lamps.
  • One embodiment of the present invention comprises the selection of first and second colorants which each luminesce at different visible wavelengths when irradiated by non visible radiation (preferably UV).
  • the exciting wavelength(s) for each colorant are substantially different.
  • the first colorant may be applied onto an opacified region of the surface of a polymeric film.
  • the second colorant may be incorporated throughout the whole film, throughout a selected transparent region thereof and/or coated and/or printed on top of a transparent region of the film in which case the film need not be impregnated.
  • transparent means transparent both to the visible light emitted and to the source of excitation radiation where used (such as UV).
  • the first colorant in the first embodiment may be selected so it emits visible light when irradiated at a first wavelength (preferably in the UV) which is neither absorbed by the film nor by the second colorant.
  • the first colorant may be opaque to the wavelength(s) which cause the second colorant to luminesce.
  • a first region of the film may be printed or coated on one side with the first colorant (1).
  • a second region of the film disposed from the first region may comprise a transparent window (7) in the film which may expose the film impregnated with the second colorant and/or may be a overprinted with the second colorant on the same or opposite side of the film (5) to the first colorant (more preferably the opposite side).
  • the transparent window may be formed by a gap in an opacifying coating (3) or treatment on one side of the film surface.
  • arrow A denotes for broad spectrum radiation which excites both colorants and A1 + A2 for those wavelengths which separately excite the first and second colorants respectively.
  • Arrow B denotes luminescence from the first colorant and arrow C from the second colorant. Crossed arrows indicate no luminescence occurs due to the absence of the relevant colorant or the blocking of the exciting radiation to that region.
  • the first and second colorants luminesce at their different visible wavelengths (respectively arrows B and C) to give a marks of different colour in the first region (1) and transparent window (7) respectively.
  • the window may be illuminated from the side opposite the first region (1) with the non-visible exciting radiation (arrow A) to excite both the first and second colorants (e.g. broad spectrum UV) to view a new "UV feature".
  • the film window (7) does not block excitation or luminescence of the first colorant.
  • the second colorant is excited at different wavelengths from the first colorant. This has been found to be important as if the excitation wavelengths of the two colorants are found to be substantially the same, attenuation of radiation due to absorption by the second colorant as the radiation passes through the window means the first colorant does not luminesce or only does so weakly.
  • the second colorant has also been selected so it is transparent to the luminescence from the first colorant.
  • both the first and second colorants can be seen to luminesce at visible wavelengths through the window to a new coloured luminescent feature additive of the luminescent colour of the two colorants.
  • the combined colour seen through the window can be more sensitive to the precise luminescence spectrum of each colorant making it more difficult for a counterfeiter to match the feature. If the second colorant is incorporated into the film directly then the edge effect and luminescence from other parts of the film make it more difficult to reproduce this feature.
  • the new additive luminescence feature can be made one way as for example if the folded film is viewed or / irradiated from the other film surface on the other side of the fold from the transparent window the first colorant and/or it's underlying opaque coat can be selected to block the exciting radiation from the window and/or the luminescence from the second colorant so no colour change can be seen though the transparent window from that side.
  • This feature is thus a non-visible (UV) one-way security feature as it seen from only one side when the film is folded over.
  • the second region is positioned near to or adjacent the edge of the sheet.
  • this feature could be use independently of the first colorant and is a further aspect of the present invention.
  • Various alternative arrangements of a sheet according to the invention are shown in the Figures herein including the one-way effect of the feature seen on folding.
  • Colorants which are suitable for use in the present invention are any with the required luminescent properties which are available from colorant manufacturers.
  • the term 'colorant' as used herein also includes materials which are uncoloured in their unexcited ground state and which only emit coloured light when they are excited. This is indeed advantageous as the presence of colorant can be hidden to the causal user. It will be appreciated that for colorants to be incorporated into a polymer film they must be compatible with the polymer (for example by being, chemically similar).
  • the term 'colorant' encompasses both of the terms 'dye' and 'pigment'. Dyes are usually at least partially soluble in the medium to which they are added and are often small organic molecules which are more unstable.
  • Pigments are usually substantially insoluble in the medium to which they are added and are often inorganic crystalline materials or large organic molecules, which are more stable so their colour tends to fade less over time.
  • the terms 'colorant', 'dye' and 'pigment' can be considered interchangeable as used herein.
  • UV luminescent materials which may be used in the present invention as either the first and/or second materials may comprise: any known and future optical brighteners and/or phosphorescent or fluorescent whitening agents which for example may absorb non-visible UV radiation to luminesce in the visible spectrum.
  • a non-exhaustive list of suitable commercially available materials which fluoresce when excited with UV comprises (known by the following chemical and/or trade names): stilbene derivatives; styryl derivatives of benzene and biphenyl; pyrazolines; bis(benzoxazol-2-yl) derivatives (such as 2'-[2-benzathiazoyl]-6-phosphate-benzathiazole which is available commercially under the trade mark AttoPhos® to detect alkaline phosphatase); benzoxadiazoles (such as nitrobenzoxadiazole (NBD)); coumarins (such as 7-amino-4- methylcoumarin); carbostyrils; naphthalimides; acylamino derivatives of diaminodibenzothiophene disulphonic acid dioxides; pyrene derivatives of triazines; quaternized pyridotriazoles; rhodamines and derivatives thereof (such as tetramethyl
  • fluorescent materials comprise any material (including those already listed herein) which are known in the art as fluorescent labels and/or stains for biological systems.
  • suitable luminescent materials suitable for use in the present invention will be well known to those skilled in the art.
  • suitable commercially available materials which phosphoresce when excited with UV comprise: rare earth phosphors and/or calcium, strontium and/or barium halophosphate phosphors optionally activated with sensitiser ions to provide a route for the triplet state to undergo radiative decay and/or any suitable mixtures and/or combinations thereof.
  • Preferred luminescent (fluorescent and/or phosphorescent) materials which may be used in the present invention comprise any of the following: benzoxadiazoles and derivatives such as: 2'-[2-benzathiazoyl]-6-phosphate-benzathiazole (AttoPhos®); nitrobenzoxadiazole (NBD); 2,5-di(5-(2-methylprop-2-yl)-1 ,3-benzoxazolyl) thiophene which is available commercially from Ciba Speciality Chemicals under the trade mark Uvitex® OB ; coumarins such as:
  • e donor acceptor chromogens such as:
  • lanthanide chelates such as:
  • M may be for example a metal capable of forming a porporphyin complex such as Pd or Pt; any of inorganic phosphorescent materials such as calcium halophosphates phosphors activated with Sb 3+ and/or Mn 2+ sensitiser ions; rare earth phosphors such as: Y 2 O 2 and/or Y 2 O 2 S with Eu 3+ ions; CeMgAlnOig with Tb 3+ ; LaPO 4 with Ce 3+ and/or Tb 3 ; LnMgB 5 O ⁇ 0 with Ce 3+ and/or Tb 3 (where Ln denotes any lanthanide, preferably Gd); BaMg 2 AL ⁇ 6 O 27 with Eu 2+ ; Sr 5 . ⁇ -yBa ⁇ Ca y (PO 4 ) 3 CI with Eu 2+ (where y ⁇ 1); BaSi 2 O 5 with Pb 2+ ; Sr 4 B 4 O 7 with Eu 2+ ; SrAI 14 O 25 with Eu
  • Certain of the aforementioned luminescent materials may act as probes and only luminesce when bound to a target molecule or class of molecules (such as DNA). Where necessary such target molecules can also be added to an article authenticated according to the present invention.
  • This aspect of the invention can optionally be used in combination with the taggants (such as informational molecules e.g. DNA) used as described in the applicant's patent application WO03/030129.
  • a specific example of a second colorant which may be used when the polymer film is a polyolefin such as BOPP is the dye which fluoresces blue when excited at 365 nm (UV-A), which is available commercially from Ciba under the trade mark Uvitex® OB (structure given previously).
  • Colorants which luminesce when excited at 280 nm include phosphorescent rare earth complexes for example those available from Honeywell under the trade mark Lumilux® and these could be used as the first colorant especially in combination with a second colorant of Uvitex® OB.
  • Colorants which luminesce at two wavelengths when excited at 330 nm (UV-A) and at 270 nm (UV-C) (dual wavelength) include mixtures of two or more luminescent materials for example the pigment composition comprising a mixture of two phosphor complexes Y 2 O 2 S:Eu and Zn 2 SiO 4 :Mn which phosphoresce respectively pink (525 nm) and yellow / green (625 nm).
  • This composition is available commercially from Honeywell under the trade name Lumilux® CD-R/G I. Such mixtures can be used as either the first or second colorant herein.
  • the authentication means described herein can use any other means to bring the first and second colorants into register as described for example a sheet can be bent, folded and/or twisted.
  • Differently shaped articles e.g.3D articles such as bottles
  • the security feature of the present invention may be incorporated directly into a suitable article and/or document or may be attached thereto (e.g. in a permanent or tamper evident manner) and/or is otherwise associated therewith as part of a security and/or authentication means.
  • a suitable article and/or document or may be attached thereto (e.g. in a permanent or tamper evident manner) and/or is otherwise associated therewith as part of a security and/or authentication means.
  • the term article includes but is not limited to printed matter such as documents.
  • Suitable articles which may be authenticated as described herein may comprise an integral part of a larger article and/or product (e.g. a high value article whose authenticity it is desired to check).
  • the article may comprise for example a label and/or tag which is designed to be or attached to another article and/or for example comprise the packaging associated with another article.
  • An article of the present invention (in which the article and/or product to which the security article is attached, of which it is an integral part and/or with which it is associated), may preferably be one which would otherwise be susceptible to counterfeiting due to the high value, prestige and/or other importance associated with the article and/or product and/or where authentication of a genuine article and/or product is desired.
  • an article of the present invention comprises a security document such as one or more of; security tag, label, packaging, brand, trademark, logo, currency note, cheque, share certificate, bond, stamp, passport, official document, ticket, security pass and the like.
  • a security document such as one or more of; security tag, label, packaging, brand, trademark, logo, currency note, cheque, share certificate, bond, stamp, passport, official document, ticket, security pass and the like.
  • an article of the present invention is associated with, attached to and/or comprises an article selected from at least one of the group consisting of: antique objects; audio and/or visual goods for example blank and/or pre-recorded media in any format (e.g. compact disks, audio tapes and/or video tapes); chemical products for example pesticides, cleaning products, washing powders and/or detergents; tobacco products for example cigarettes, cigars, and/or tobacco goods; clothing articles for example leather articles; soft and/or alcoholic beverages for example wines or spirits; entertainment goods for example toys and/or computer games; foodstuffs for example tea, coffee, meats, fish, caviar and/or delicatessen produce, electrical and electronics parts for example computers and/or spare parts therefor, electronic objects and/or computer software, high technology machines and/or equipment; jewellery for example watches; leisure items for example binoculars and/or telescopes; perfumes and/or cosmetics for example shampoos, soaps, perfumes, deodorants, body lotions, creams, toothbrushes, toothpastes, razor
  • optical glasses and/or sunglasses and/or pharmaceutical products
  • pharmaceutical products e.g. in any suitable form for application for example pills, tablets, syrups and/or lotions
  • military equipment for example guns, gun sights, ammunition, rockets, military clothing, foodstuffs, gas-masks, mines, grenades and/or ordinance
  • photographic industry goods for example cameras and/or pellicles
  • scientific instruments and spare parts therefor for example microscopes, chromatographic apparatus, spectrometric and/or nuclear magnetic resonance apparatus
  • machinery and spare parts for the transport industry for example parts for automotive, aerospace and/or aeronautical industry goods, cars, lorries/trucks, motorcycles, space vehicles, rocket ships, vehicle's windscreen stickers, tax discs, trains, coaches and buses, aeroplanes, tubes, trams, helicopters, deep sea exploration equipment, submarines, ships, boats, liners and/or merchant vessels; travel goods for example luggage; security goods, for example currency (such as bank-notes), cheques, share certificates, stamps and/or official documents; sports
  • An article made using the authentication means as described herein may comprise any other compatible security and/or authentication means in any compatible combination comprises, optionally in corresponding patterns the article: such as any of Moire inducing pattern, optical lens, Fresnel lens, multiple micro-lens, lenticular lens, distorting lens, metameric ink, micro-printing and polarising filter.
  • a further aspect of the invention broadly comprises a method of manufacturing a comprising the step of: applying an article (for example a security document) as described herein to the product as an integral part of the product, by attaching the article to the product and/or by associating the article with the product.
  • an article for example a security document
  • Another aspect of the invention broadly comprises a method of authenticating a product comprising the steps of:
  • Still other aspects of the invention broadly comprise:
  • Preferred articles of the invention comprise a self supporting sheet like substrate which incorporate a transparent or translucent window suitable for use with the authentication feature as described herein.
  • Sheets which may be used to make the authentication device of the present invention comprise membranes, films, layers, laminates, webs, vellums, pellicles, skins, matrices, mats, veils, weaves, coatings, additives, impregnates, composites, and similar terms, mixtures and/or combinations thereof whether synthetic or natural and such sheets may be suitable for the uses described herein, for example to form (in whole or in part) packaging, labels and/or documents which may have need of a security and/or tracking feature.
  • Suitable materials from which to make sheets with the authentication device described herein comprise thermoplastic polymers such as BOPP and/or biopolymers such as cellulose or polylactic acid.
  • Other suitable sheet materials suitable to form the authentication device described herein are well known to those skilled in the art. A non- exhaustive list of such materials is given in the applicant's patent application WO02/40579 for a film coated with a nanostarch coating as an oxygen barrier (especially the section from page 14, lines 1 to 24) and this document is incorporated herein by reference.
  • Suitable polyolefin (e.g. BOPP) polymer films are also described in WO02/40579 (page 14, line 25 to page 18, line 27).
  • Additives suitable for use in polyolefin films are described in WO02/40579 (page 18, line 29 to page 21 , line 37)
  • Suitable biopolymeric films for use in the present invention comprise cellulose and/or polylactic acid films.
  • Other suitable biopolymers and preferred features thereof are described in the applicant's patent application WO 02/074874 for a wet glue label, (especially the section from page 5, line 33 to page 8, line 6) and this document is incorporated herein by reference.
  • Suitable uses of such sheets include as documents, synthetic paper, labels, graphic art displays, print receptive substrates (e.g. using conventional printing methods such as screen, flexographic, gravure, offset etc and/or digital printing methods such as ink-jet printing, thermal image transfer and/or electrorepography), food packaging, lidding, overwrap, stretch wrap, shrink wrap and/or for tamper evidence.
  • the films may be supplied in any suitable form e.g. as roll stock and/or sheets.
  • Preferred sheets for use herein are which may be optionally coated, metallised, opacified or otherwise conventionally treated at least over part of the surface thereof so that a transparent region remains thereon.
  • Figure 1 is a sectional view through part of a film of the present invention comprising a first exemplary embodiment of a security device of the invention where a region (101 ) of a first luminescent colorant (B) is printed is printed on top of the opaque coating (103).
  • the core film (105) is impregnated with a second luminescent colorant (C).
  • Figure 2 and 3 show the film of Figure 1 folded over itself with alternate surfaces adjacent in each Figure and illuminated with broad spectrum UV (A). Folded either way the film appearance viewed through the window (103) without the coating (103) is different from the rest of the film.
  • Figure 4 is a sectional view through part of a film of the present invention comprising a second exemplary embodiment of a security device of the invention where the region (101) of the first luminescent colorant (B) is printed on the other side of the film to the opaque coating (103).
  • Figure 5 and 6 show the film of Figure 4 folded over itself with alternate surfaces adjacent in each Figure and illuminated with broad spectrum UV (A).
  • Folded one way Figure 5) the film appearance viewed through the window (103) is the same as the rest of the film as the opaque coat (103) blocks excitation of the colorants.
  • Folded the other way in Figure 6) the film appearance viewed through the window (107) is different from the rest of the film.
  • Figure 7 is a sectional view through part of a film of the present invention comprising a third exemplary embodiment of a security device of the invention similar to the film in Figure 4 where the first region (201) and the core film layer (205) luminesce when irradiated at different UV wavelengths.
  • Figure 8 to 10 show the film of Figure 7 folded over itself and illuminated with UV at a wavelength to cause respectively in Figure 8 the first area (201), in Figure 9 the core film layer (205) and in Figure 10 both of them to luminesce.. In each case the film appearance viewed through the window (207) is different from the rest of the film.
  • Figure 11 is a sectional view through part of a prior art film (such as described in GB 2,300,956) comprising two UV fluorescent materials in different layers (301 , 305) with a UV opaque layer (303) there between.
  • Figure 12 to 13 show the film of Figure 11 folded over itself with alternate surfaces adjacent in each Figure and illuminated with broad spectrum UV (A). It can been that the both colorants (B and C) cannot fluoresce simultaneously as the UV radiation (A) does not pass through the opaque layer (303).
  • Figure 14 is a sectional view through part of a prior art film (such as described in EP 0775589) comprising a UV fluorescent layer (401) sandwiched between two transparent layers.
  • Figure 15 shows that the when the film is illuminated with broad spectrum UV (A) the fluorescent layer emits light of only one colour (B) irrespective of whether of not the film is folded over itself.
  • Figure 16 is a sectional view through part of a prior art film (such as described in DE
  • Figures 17 and 18 show the film of Figure 16 folded over itself with alternate surfaces adjacent in each Figure and illuminated with broad spectrum UV (A). It can been that the both colorants (B and C) in the coating fluoresce simultaneously to give the coating a uniform appearance.
  • a conventional stiffened BOPP three layer film of thickeness 90 microns was produced by coextrusion in the well know bubble process comprising a core polymer layer of BOPP and other surface polymer layers for easier of printablity and further coating and surface treatment.
  • An additive Uvitex OB (described herein) which luminesces in blue after irradiation at 365 nm was added to the core polypropylene polymer before extrusion and orientation at a concentration of 0.002% (2 x 10 "3 %).
  • the resulted film was opacified by use of a conventional coating apart from a transparent window near one edge.
  • a rare earth complex pigment which luminesces red / orange on irradiation at 254 nm was printed onto the film in a first region sufficiently spaced from the window so the window can be folded over that region.
  • the first region On irradiation of the flat film with an artificial UV source at wavelengths of 254 nm and 365 nm the first region was seen to luminesce orange red and the transparent window luminesced blue. In addition a blue glow was seen from the film edge near the window due to total internal reflection of the luminescence within the film.
  • the film was folded so the window overlapped the first region and UV irradiated (254 nm and 365 nm) through the window. A purple / green luminescence was seen through the window as well as blue glow from the film edge near the window.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

La présente invention concerne un article d'authentification (par ex. un document de sécurisation ou une feuille fait(e) d'un film polymère transparent tel que du polypropylène à orientation biaxiale (BOPP)), qui comprend une première matière luminescente dans une première zone (201) ( par ex. un revêtement, éventuellement à motif, d'un pigment d'un complexe de terre rare) et une seconde matière luminescente dans une seconde zone (207) (par ex. 2,5-thiophèneduiyl bis(5-tert-butyl-1,3-benzoaxole - Uvitex B de CIBA éventuellement incorporé à 2 x 10-3 % en poids dans la couche noyau (205) du film polymère). La seconde zone comprend une fenêtre transparente (207), le reste de l'article étant éventuellement opaque. L'article peut être replié sur lui-même de sorte que la fenêtre (207) recouvre au moins une partie de la première zone. Les deux matières sont luminescentes à des longueurs d'onde différentes de la plage du visible lorsqu'elles sont excitées (par ex. le revêtement émet une fluorescence rouge/oranger lorsqu'il est excité avec des UV-C à 254 nm alors que la fenêtre émet une fluorescence bleue lorsqu'elle est excitée avec des UV-A à 365 nm). Cependant, lorsque l'article est replié de sorte que la première zone (201) peut être vue à travers la fenêtre transparente (207) puis excitée (par exemple éclairée avec des UV à large spectre), la luminescence combinée des deux matières est perçue comme un changement de couleur (par ex. une émission de fluorescence dans le violet/vert) qui peut servir à authentifier l'article.
PCT/EP2003/005559 2002-05-31 2003-05-27 Moyen d'authentification WO2003101755A1 (fr)

Priority Applications (1)

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AU2003237695A AU2003237695A1 (en) 2002-05-31 2003-05-27 Authentication means

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GBGB0212638.1A GB0212638D0 (en) 2002-05-31 2002-05-31 Authentication means
GB0212638.1 2002-05-31

Publications (1)

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WO2003101755A1 true WO2003101755A1 (fr) 2003-12-11

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004087795A1 (fr) * 2003-04-02 2004-10-14 Ucb, S.A. Element d'authentification
WO2006029744A1 (fr) * 2004-09-15 2006-03-23 Ovd Kinegram Ag Document de securite
WO2006101217A2 (fr) * 2005-03-22 2006-09-28 Fujifilm Corporation Composes lumineux comprenant un ion de lanthanides
EP1719637A2 (fr) * 2005-05-06 2006-11-08 Canadian Bank Note Company, Ltd. Document de sécurité avec caractéristique d'authenticité UV
EP1801148A1 (fr) * 2005-12-20 2007-06-27 Total Petrochemicals Research Feluy Procédé pour la séparation et le recyclage des articles en polypropylène
JP2008074892A (ja) * 2006-09-19 2008-04-03 Fujifilm Corp 蛍光性重合体微粒子セット、蛍光検出用複合体セット、蛍光性重合体微粒子組成物及び蛍光検出方法
WO2008141632A2 (fr) * 2007-05-23 2008-11-27 Loessl Fariborz Martin Zahedi Élément sous forme de feuille permettant une reconnaissance d'authenticité
EP2292329A1 (fr) 2009-09-08 2011-03-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Substrat polymère doté d'une structure fluorescente, son procédé de fabrication et son utilisation
WO2011012893A3 (fr) * 2009-07-31 2011-06-23 Innovia Films Sarl Document de sécurité
WO2013020984A1 (fr) * 2011-08-08 2013-02-14 Banque De France Dispositif de securite luminescent pour un document comportant une fenetre transparente
WO2013020983A1 (fr) * 2011-08-08 2013-02-14 Banque De France Dispositif de securite luminescent anime pour un document, procede de detection et dispositif de detection correspondants
WO2013124160A1 (fr) 2012-02-23 2013-08-29 Sicpa Holding Sa Document audible identification pour des personnes ayant une déficience visuelle
WO2014086531A1 (fr) 2012-12-07 2014-06-12 Sicpa Holding Sa Élément de sécurité de documents à pavages non périodiques
WO2017054012A1 (fr) * 2015-09-27 2017-03-30 Purdue Research Foundation Appareil de triboluminescence et procédé de détection rapide de cristallinité homochirale dans des formulations pharmaceutiques

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WO1983000659A1 (fr) 1981-08-24 1983-03-03 Solomon, David, Henry Amelioration aux billets de banque et autres
WO1990000980A1 (fr) * 1988-07-25 1990-02-08 Elba Holding Bv Piece d'identite stratifiee avec protection contre la falsification par destratification
EP0388090A1 (fr) 1989-03-10 1990-09-19 THOMAS DE LA RUE & COMPANY LIMITED Feuille avec dispositif de sécurité
DE4114732A1 (de) 1991-05-06 1992-11-12 Helmut Dr Bayer Sicherheitskennzeichnung fuer papiere und andere materialien mit ebenen oberflaechen
GB2300596A (en) 1995-05-10 1996-11-13 Portals Ltd Fluorescent security feature for cheques and banknotes
EP0775589A1 (fr) 1995-11-23 1997-05-28 Agfa-Gevaert N.V. Document de sécurité laminé contenant un colorant fluorescent
WO1998015418A1 (fr) 1996-10-10 1998-04-16 Securency Pty. Ltd. Documents de securite a auto-verification
WO2000041159A1 (fr) 1999-01-08 2000-07-13 Ucb, S.A. Moyen d'authentification

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Publication number Priority date Publication date Assignee Title
WO1983000659A1 (fr) 1981-08-24 1983-03-03 Solomon, David, Henry Amelioration aux billets de banque et autres
WO1990000980A1 (fr) * 1988-07-25 1990-02-08 Elba Holding Bv Piece d'identite stratifiee avec protection contre la falsification par destratification
EP0388090A1 (fr) 1989-03-10 1990-09-19 THOMAS DE LA RUE & COMPANY LIMITED Feuille avec dispositif de sécurité
DE4114732A1 (de) 1991-05-06 1992-11-12 Helmut Dr Bayer Sicherheitskennzeichnung fuer papiere und andere materialien mit ebenen oberflaechen
GB2300596A (en) 1995-05-10 1996-11-13 Portals Ltd Fluorescent security feature for cheques and banknotes
EP0775589A1 (fr) 1995-11-23 1997-05-28 Agfa-Gevaert N.V. Document de sécurité laminé contenant un colorant fluorescent
WO1998015418A1 (fr) 1996-10-10 1998-04-16 Securency Pty. Ltd. Documents de securite a auto-verification
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WO2000041159A1 (fr) 1999-01-08 2000-07-13 Ucb, S.A. Moyen d'authentification

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004087795A1 (fr) * 2003-04-02 2004-10-14 Ucb, S.A. Element d'authentification
US7762591B2 (en) 2004-09-15 2010-07-27 Ovd Kinegram Ag Security document
WO2006029744A1 (fr) * 2004-09-15 2006-03-23 Ovd Kinegram Ag Document de securite
WO2006101217A2 (fr) * 2005-03-22 2006-09-28 Fujifilm Corporation Composes lumineux comprenant un ion de lanthanides
JP2006299230A (ja) * 2005-03-22 2006-11-02 Fuji Photo Film Co Ltd ランタニドイオンを含有する発光性化合物
WO2006101217A3 (fr) * 2005-03-22 2007-04-19 Fujifilm Corp Composes lumineux comprenant un ion de lanthanides
EP1719637A2 (fr) * 2005-05-06 2006-11-08 Canadian Bank Note Company, Ltd. Document de sécurité avec caractéristique d'authenticité UV
EP1719637A3 (fr) * 2005-05-06 2012-06-06 Canadian Bank Note Company, Limited Document de sécurité avec caractéristique d'authenticité UV
EP1801148A1 (fr) * 2005-12-20 2007-06-27 Total Petrochemicals Research Feluy Procédé pour la séparation et le recyclage des articles en polypropylène
WO2007071702A1 (fr) * 2005-12-20 2007-06-28 Total Petrochemicals Research Feluy Methode de tri et de recyclage d'articles en polypropylene
JP2008074892A (ja) * 2006-09-19 2008-04-03 Fujifilm Corp 蛍光性重合体微粒子セット、蛍光検出用複合体セット、蛍光性重合体微粒子組成物及び蛍光検出方法
WO2008141632A2 (fr) * 2007-05-23 2008-11-27 Loessl Fariborz Martin Zahedi Élément sous forme de feuille permettant une reconnaissance d'authenticité
WO2008141632A3 (fr) * 2007-05-23 2009-05-07 Loessl Fariborz Martin Zahedi Élément sous forme de feuille permettant une reconnaissance d'authenticité
WO2011012893A3 (fr) * 2009-07-31 2011-06-23 Innovia Films Sarl Document de sécurité
US9878572B2 (en) 2009-07-31 2018-01-30 Innovia Films Limited Security document
EP2292329A1 (fr) 2009-09-08 2011-03-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Substrat polymère doté d'une structure fluorescente, son procédé de fabrication et son utilisation
US9597688B2 (en) 2009-09-08 2017-03-21 Ibidi Gmbh Polymer substrate with fluorescent structure, method for the production thereof and the use thereof
WO2013020983A1 (fr) * 2011-08-08 2013-02-14 Banque De France Dispositif de securite luminescent anime pour un document, procede de detection et dispositif de detection correspondants
FR2978936A1 (fr) * 2011-08-08 2013-02-15 Banque De France Dispositif de securite luminescent pour un document comportant une fenetre transparente.
FR2978937A1 (fr) * 2011-08-08 2013-02-15 Banque De France Dispositif de securite luminescent anime pour un document, procede de detection et dispositif de detection correspondants.
WO2013020984A1 (fr) * 2011-08-08 2013-02-14 Banque De France Dispositif de securite luminescent pour un document comportant une fenetre transparente
WO2013124160A1 (fr) 2012-02-23 2013-08-29 Sicpa Holding Sa Document audible identification pour des personnes ayant une déficience visuelle
WO2014086531A1 (fr) 2012-12-07 2014-06-12 Sicpa Holding Sa Élément de sécurité de documents à pavages non périodiques
WO2017054012A1 (fr) * 2015-09-27 2017-03-30 Purdue Research Foundation Appareil de triboluminescence et procédé de détection rapide de cristallinité homochirale dans des formulations pharmaceutiques

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GB0212638D0 (en) 2002-07-10
AU2003237695A1 (en) 2003-12-19

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