WO1993011946A1 - Impression sur films plastiques - Google Patents

Impression sur films plastiques Download PDF

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Publication number
WO1993011946A1
WO1993011946A1 PCT/GB1992/002266 GB9202266W WO9311946A1 WO 1993011946 A1 WO1993011946 A1 WO 1993011946A1 GB 9202266 W GB9202266 W GB 9202266W WO 9311946 A1 WO9311946 A1 WO 9311946A1
Authority
WO
WIPO (PCT)
Prior art keywords
plastics film
layer
document
plastics
printed
Prior art date
Application number
PCT/GB1992/002266
Other languages
English (en)
Inventor
Mark Jennings
Original Assignee
Mark Jennings
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 Mark Jennings filed Critical Mark Jennings
Priority to JP5510699A priority Critical patent/JPH07502465A/ja
Priority to GB9409907A priority patent/GB2277714B/en
Priority to AU30905/92A priority patent/AU670556B2/en
Priority to EP92924796A priority patent/EP0615489B1/fr
Priority to DE69222779T priority patent/DE69222779T2/de
Publication of WO1993011946A1 publication Critical patent/WO1993011946A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/0256—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet the transferable ink pattern being obtained by means of a computer driven printer, e.g. an ink jet or laser printer, or by electrographic means
    • 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
    • B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials

Definitions

  • the present invention relates to printing and more particularly, though not exclusively, to the printing of plastics to produce documents which are harder to copy; it also relates to the construction of the document produced, intermediate products made, and their methods of manufacture.
  • the colourants used can be removed from plastics by the use of solvents such as acetone, thereby leaving the documents open to alteration.
  • solvents such as acetone
  • attempts have been made to bond a further plastics layer over the printed layer thereby enclosing the ink.
  • Two major problems have, however, become apparent. Firstly, it has been found that plastics, for example, PVC or polyester/polyethylene film will not fully bond to itself or each other where one or the other has been coloured with an ink or dye stuff.
  • the present invention can be used to provide products which substantially do not bleed or which bleed at controlled rates.
  • a process for printing a plastics film comprising: printing a colourant onto a layer of material
  • the plastics film is a polyester film coated with polyethylene, such as that purchased from Morane (Banbury, U.K.) under the trade name Morafast.
  • plastics such as, for example, polyvinyl- chloride may be used, but the ink can be removed with acetone.
  • the bonding properties of polyethylene make it preferred and the ink is, after bonding, unaffected by acetone.
  • the ink or dye is transferred to the polyethylene coated surface.
  • the colourant used may be any ink or dye but the following are preferred: diethylene glycol based ink using food dyes as colourants.
  • the material of a particulate or colloidal nature is preferably silica, a sand, silicon, clay or chalk.
  • Silica is most preferred and is referred to throughout the remainder of the specification, although the above alternatives can be used also.
  • the particles are provided in a coating with latex (e.g. PVA) or starch.
  • latex e.g. PVA
  • starch e.g. PVA
  • the backing is a dense paper exceeding
  • the paper has a low level of loose fibres or no loose fibres.
  • Parchment paper is preferred and is produced by dipping paper in cone. H2SO4 and then washing.
  • the colourant or ink can be applied by hand, or by machine.
  • Suitable machines include, for example, computer controlled printers, dot matrix, laser and ink jet printers or printing plates etc, but ink jet printers are preferred.
  • the ink can be transferred to the plastics film by bringing the plastics film into contact with the surface of the material having a particulate nature, which material has been printed over, and subjecting it to a constant heat. This can be done by passing the two layers through a standard laminator. The temperature required will depend on the plastics used and the thickness of the sheets.
  • the backing layer usually paper
  • the backing layer can then be peeled off, with washing and scrubbing if necessary, to leave a printed plastics sheet which has absorbed the ink. Consequently, it is more difficult to remove the inks by the use of solvents than with conventionally printed plastics.
  • printed plastics can also be bonded to a further plastic sheet to encapsulate the ink or dye making the product "tamper proof". This is of particular importance in documents of a security ' nature.
  • plastics sheet comprising thereon a layer of silica.
  • the particle size of most or substantially all the particles is from 5 microns to 0.006 microns in diameter, more preferably from l ⁇ m to
  • the particle size can be determined by passing particles through a graded series of sieves and determining which sieves the particles will or will not pass through.
  • the plastics film used may be formed from any of the plastics hereinbefore mentioned, but the preferred plastics film is a polyester/polyethylene laminate.
  • the layer of particles is formed on the polyethylene side of the laminate.
  • Loadings of 8-20g/m 2 (preferably 10 to 15 g/m 2 ) give opaque documents.
  • the layer of particulate or colloidal material preferably should not be exposed to an atmosphere of above 40% humidity for any lengthy period of time (e.g. not for longer than 20 minutes) .
  • the second plastics film should then be laminated to the first plastics film at a temperature of at or above 350°F. This also applies to the silica, plastics layers and/or paper prior to being used for a product intended not to bleed.
  • the said layer preferably should be exposed to an atmosphere of above 40% humidity (e.g. 40 to 80% humidity) .
  • the first plastics film can be subjected to a very fine water mist. Desirably the layer takes in no further moisture from the atmosphere.
  • the second plastics film then desirably is laminated to the first at a temperature at or below 350°F.
  • a mark akin to a "water mark” can be introduced.
  • the mark as it is hereafter referred may be produced as follows:
  • a sheet of paper preferably with a weight in excess of 80 gms, but lower weights can be used, and having coated thereon fine particles of silica has a design embossed thereon using a metal die or other means for embossing paper.
  • the impression is made on the coated side so that the coated side is depressed, although it will work, though less effectively, the other way round.
  • the embossed sheet is then placed, particle side down over a first plastics sheet and the two sheets are passed through a laminator in the same way as has been described with reference to the transfer of inks from the coated sheet..
  • the backing paper is then removed, and when a second plastics film is bonded to the first film, a mark is visible which mark contains no inks and does not appear to the hand to be raised or lowered in the end product.
  • a sheet comprising a parchment paper backing and having thereon a layer of silica, has a design printed on the silica layer.
  • the inks or dyes used are standard printing dyes and the design is applied by a computer controlled printer, printing plate or other means.
  • a part of the coated surface is raised by embossing the paper with a metal die having a raised design thereon.
  • the printed sheet is then covered, for example, with a 100 microns thick polyester plastics sheet with a 16 micron thick polyethylene coat on at least one side, so that the polyethylene coat faces the silica coated surface of the printed sheet.
  • the two are heated to a temperature at which the polyethylene melts sufficiently to take up ink.
  • this temperature will desirably be between 32°C (90°F) and 60°C (140°F), preferably about 38°C (about 100°F) and can be achieved by passing the respective sheets through, for example, a pouch or role laminator.
  • the polyester sheet is preferably above 30, e.g. up to 500 microns thick and the polyethylene coat is preferably from 12, e.g., up to 20 microns thick. It is desirable that the heat applied is constant and that sufficient pressure is exerted to expel any air from between the sheets.
  • the backing paper is then removed. Generally it can be peeled off, but if it is well stuck down it can be soaked and scrubbed as necessary.
  • the raised parts caused the polyethylene to be "pushed out” as the paper was laminated to the plastics.
  • the paper having been removed, and laminated a distinctive mark is left.
  • the amount of heat used in lamination affects the clarity of the mark. The hotter the lamination the less clear the resulting mark. Generally a lamination temperature of greater than 49°C (120°F) is used.
  • the silica layer is sandwiched between two polyethylene layers.
  • the Examples illustrated by the Table were performed using parchment paper and a diethylene glycol ink comprising a food dye.
  • the ink was prepared by treating yellow food dye obtainable under the trade mark "GOLD SEAL” (from Clayton & Jowett
  • Bleeding could be effected with other ink jet inks provided that after removing the backing paper the layer of silica is exposed to an atmosphere of at least 40% humidity and the temperature at final lamination was below 177°C (350°F).
  • Yellow, magenta and cyan food dyes are obtainable under the trade mark "GOLD SEAL" and can be used to form ink jet inks as aforesaid, (except that 75% rather than 50% of the volume of the dye is evaporated) . By mixing these dyes in appropriate proportions different colours can be produced, as desired.
  • bleeding it is desirable in certain circumstances for bleeding to occur after a given time. This is the case, for example, where a ticket or card is intended to be valid for a limited period only, the expiry of this period being indicated by bleeding of the ink.
  • the time can be varied at which bleeding occurs.
  • cards can be produced which will normally only bleed after several months (see e.g. Example 2). However, bleeding can be accelerated by puncturing or tearing the card to expose the silica to the atmosphere.
  • the label can be formed with a line or point of weakness to which it is attached via a tag, to the consumer product. When the label is removed from the tag, tearing along the line of weakness exposes the silica to accelerate bleeding.
  • a label comprising the removable holographic image and adhesive is also within the scope of the present invention. It has also been found that if a hologram printed on polyester and placed, e.g. in the centre of a number of various other sheets of printed laminate, then the special effects can be made which to date no- one has been able to photocopy, or even copy using a scanning unit.
  • any part of the top-most layer, if the item is tilted accordingly, is all that can be viewed, so that in the case of a credit card, this top part could be printed with the name, signature and account number of an authorised user.
  • a hybrid document can be produced i.e. one embodying the printed plastics described with an insert of printed paper or a material which can be marked when pressure is applied thereto. Since the printed material used will eventually fade in time, it is preferred in some embodiments to coat the plastics with a material which reflects ultra-violet light or to use an ultra-violet resistant polyester, which light is responsible for the fading.
  • the fading of the ink due to exposure to U.V. light can be used advaritageously.
  • tickets such as concert or football tickets may have certain information printed in an ink which on exposure to a high dosage of ultra-violet light will be destroyed.
  • a heat sensitive material or chemical may be used on the ticket so that a pre-defined number/pattern or image etc. shows up under certain conditions.
  • Fibre optics may be incorporated into a document. They can be applied so that either: a) One or more fibres which have been etched via a laser or other means with either words or a design, are affixed on or between the laminate sheets so that when a light is applied to the edge of the card, where viewed from the front of the card. It has also been found that if the amount of light is- measured at the start of the fibres, the amount of light received at the other end will depend on the amount and size of the words or design etched onto the fibres due to light being diverted through the design. Therefore the amount of light received at the end can be anticipated and measured and if the light does not reach or is over a certain level, then, the card/document will be suspect.
  • a number of fibres are set in such a way that light transmitted onto one edge of the card is received at another edge. Light sensors can then be used to detect the received light and to read it at an angle which is oblique to the direction in which light enters the card, and if the correct message is not received then the card is considered "suspect".
  • the fibres can be arranged in such a way that they can be read as a number i.e. using the same principle as a bar code. Each card can have its own unique number or bar code.
  • a fluorescent fibre can be also used whereby light is transmitted via the surface of the fibre to the fibre ends. These too can be etched and read by a light sensor/reader. If in the case of a credit card, for example, fibre optics are placed across the whole of the card information such as A/C number, name, etc., plus any other information, can be etched in and read by an automatic reader by moving the card relative to the reader.
  • a magnetic strip can, however, be fixed/sprayed onto or into a product of the present invention if desired.
  • a person will read the transparent document against a plain background. If the document is placed against, for example, a white background the details of the document will show up clearly.
  • a plain hinged back can be affixed to the document.
  • the person inspecting the card can both see the card clearly, and by raising the flap can see that no changes or insertions have been made.
  • 3D images can be made by the fact that for example: - mountains and sky can be printed on a first film, trees and bushes on a second etc. If, as has been found, clear film is inserted between these printed films, an effective 3D effect can be made or at least some depth of field achieved.
  • Another addition to the security aspect includes printing a document so small, that it cannot be read by the naked eye, but can be read with the use of a magnifying glass.
  • security can be enhanced by applying a prism effect.
  • the plastics incorporates a number of prisms - some running in one direction and some running in another. To read a document a correcting card is required or the card can be tilted to a certain angle to be able to read it.
  • security can be enhanced by the addition of a foil, preferably metal which has been embossed with lettering or design.
  • This foil is encapsulated between the sheets of plastics material.
  • this foil can be encapsulated in a plane state so that e.g., with credit cards, if the card is stamped with round letters and/or numbers these can be easily read by the naked eye.
  • the card can be used as part of an electrical circuit or a switch to cause a short circuit to, say, light up a bulb or open a door (i.e. as a key card) .
  • Another embodiment of the invention is to print either some or all of the document with white ink/dye etc. This will stop photocopying, as no photocopier can print white.

Abstract

En utilisant une matière particulaire pour absorber l'encre, cette dernière peut être transférée sur un film plastique avec un haut degré de fidelité. Le film plastique peut être ensuite stratifié avec d'autres films plastiques à des fins de sécurité pour obtenir un document de sécurité. L'humidité et la température de stratification peuvent être différentes afin d'obtenir un document qui ne dégorge pas ou qui dégorge après un certain temps.
PCT/GB1992/002266 1991-12-07 1992-12-07 Impression sur films plastiques WO1993011946A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP5510699A JPH07502465A (ja) 1991-12-07 1992-12-07 プラスチックフィルムへの印刷
GB9409907A GB2277714B (en) 1991-12-07 1992-12-07 Printing on plastic films
AU30905/92A AU670556B2 (en) 1991-12-07 1992-12-07 Printing on plastic films
EP92924796A EP0615489B1 (fr) 1991-12-07 1992-12-07 Impression sur films plastiques
DE69222779T DE69222779T2 (de) 1991-12-07 1992-12-07 Drucken auf kunststoffolien

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919126048A GB9126048D0 (en) 1991-12-07 1991-12-07 Printing
GB9126048.9 1991-12-07

Publications (1)

Publication Number Publication Date
WO1993011946A1 true WO1993011946A1 (fr) 1993-06-24

Family

ID=10705877

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/002266 WO1993011946A1 (fr) 1991-12-07 1992-12-07 Impression sur films plastiques

Country Status (8)

Country Link
EP (1) EP0615489B1 (fr)
JP (1) JPH07502465A (fr)
AU (1) AU670556B2 (fr)
CA (1) CA2125137A1 (fr)
DE (1) DE69222779T2 (fr)
GB (2) GB9126048D0 (fr)
NZ (1) NZ246064A (fr)
WO (1) WO1993011946A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2111429A2 (es) * 1994-03-22 1998-03-01 Signe Sa Papel de seguridad utilizado contra la duplicacion y/o la modificacion fraudulenta de documentos de seguridad.
GB2383012A (en) * 2001-09-12 2003-06-18 Mark Jennings An anti-counterfeit printing method which also provides means of showing the passage of time.
WO2006130887A3 (fr) * 2005-06-09 2008-07-10 Swarovski & Co Corps marque constitue d'un materiau transparent

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2142734B1 (es) * 1997-10-24 2001-01-01 Signe Sa Procedimiento para imprimir grafismos de seguridad sobre elementos laminares.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0208573A1 (fr) * 1985-06-24 1987-01-14 ARJOMARI-PRIOUX Société anonyme dite Document de sécurité utilisant des fibres optiques et procédé d'authentification
EP0419241A2 (fr) * 1989-09-19 1991-03-27 Minnesota Mining And Manufacturing Company Film de couverture transparent contre la falsification d'un document

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215392A (ja) * 1982-06-08 1983-12-14 Sanyo Electric Co Ltd 透明フイルムへの画像記録方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0208573A1 (fr) * 1985-06-24 1987-01-14 ARJOMARI-PRIOUX Société anonyme dite Document de sécurité utilisant des fibres optiques et procédé d'authentification
EP0419241A2 (fr) * 1989-09-19 1991-03-27 Minnesota Mining And Manufacturing Company Film de couverture transparent contre la falsification d'un document

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch, Week 7316, April 1973 Derwent Publications Ltd., London, GB; Class A03, AN 73-22509U *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 069 (M-286)31 March 1984 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2111429A2 (es) * 1994-03-22 1998-03-01 Signe Sa Papel de seguridad utilizado contra la duplicacion y/o la modificacion fraudulenta de documentos de seguridad.
GB2383012A (en) * 2001-09-12 2003-06-18 Mark Jennings An anti-counterfeit printing method which also provides means of showing the passage of time.
WO2006130887A3 (fr) * 2005-06-09 2008-07-10 Swarovski & Co Corps marque constitue d'un materiau transparent

Also Published As

Publication number Publication date
AU670556B2 (en) 1996-07-25
DE69222779T2 (de) 1999-09-16
EP0615489A1 (fr) 1994-09-21
JPH07502465A (ja) 1995-03-16
GB9126048D0 (en) 1992-02-05
GB2277714A (en) 1994-11-09
DE69222779D1 (de) 1997-11-20
NZ246064A (en) 1996-02-27
CA2125137A1 (fr) 1993-06-08
GB9409907D0 (en) 1994-07-06
AU3090592A (en) 1993-07-19
EP0615489B1 (fr) 1997-10-15
GB2277714B (en) 1995-10-25

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