WO2016102274A1 - Card with special visual effect and associated manufacturing process - Google Patents

Card with special visual effect and associated manufacturing process Download PDF

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Publication number
WO2016102274A1
WO2016102274A1 PCT/EP2015/080023 EP2015080023W WO2016102274A1 WO 2016102274 A1 WO2016102274 A1 WO 2016102274A1 EP 2015080023 W EP2015080023 W EP 2015080023W WO 2016102274 A1 WO2016102274 A1 WO 2016102274A1
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WO
WIPO (PCT)
Prior art keywords
layer
ink
effect
mirror
card
Prior art date
Application number
PCT/EP2015/080023
Other languages
French (fr)
Inventor
David Andrieux
Stéphane Karafotis
Gilles Kodjagueuzian
Original Assignee
Gemalto Sa
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 Gemalto Sa filed Critical Gemalto Sa
Publication of WO2016102274A1 publication Critical patent/WO2016102274A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • 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
    • 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
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/455—Associating two or more layers using heat
    • 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
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/46—Associating two or more layers using pressure
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/24—Organic non-macromolecular coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/41—Opaque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/414—Translucent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2425/00—Cards, e.g. identity cards, credit cards
    • 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
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • 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
    • B41M7/0027—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers by lamination or by fusion of the coatings or layers

Definitions

  • This invention relates to the graphics personalisation of multilayer documents, such as cards compliant with ISO 7810, which will be referred to by the generic term 'cards' in the text below.
  • the invention relates particularly to a process for manufacturing such cards using lamination so as to give them a special visual effect, and the cards obtained thereby.
  • Another known means for creating a marbled visual effect is to print a first pattern on the document followed by the printing of a second pattern with ink, which, when the solvents contained in it evaporate, forms cracks through which the first pattern can be seen.
  • the marbled visual effect in this case is random but its rendering may also be affected by the treatment and protection applied subsequently to the document.
  • ink comprising solvents that allow the formation of cracks can lead to additional manufacturing costs because a drying time is required for the solvents to evaporate so that the marbled visual effect is satisfactory.
  • document EP-2705958 describes a card with a random marbled visual effect obtained as a result of the cracking of a layer printed on a substrate and coated with a translucent protective layer, where cracking occurs when all the layers are laminated together.
  • a translucent protective layer As a result of such cracking of the printed layer, the surface of the substrate becomes locally visible through the cracks, where the whole can be seen through the protective translucent layer.
  • the patterns printed first on the substrate and the patterns of the layer that is printed in a second stage and cracked randomly by lamination the required marbled effects are achieved.
  • This invention is aimed at proposing a new process for manufacturing cards that makes it possible to obtain a card with a new visual effect that is random and durable over time. It also aims to allow the achievement of the new effect in a simple and economical manner, in steps of a process of the conventional type for making cards such as bank cards, identification cards etc.
  • the invention is aimed at a process for manufacturing a multilayer card with a special visual effect, of the type where a layer of printing ink suitable for transformation during a lamination stage as a result of the temperature and pressure constraints applied during said lamination of the card is applied between an opaque base substrate layer and a translucent or transparent substrate layer, and said lamination is then carried out.
  • the process is characterised in that the layer of printing ink comprises mirror-effect ink with pigments that change directions during lamination, resulting in a visual effect of crinkled or dented metal.
  • Mirror-effect ink is ink which, after it is applied on a transparent or translucent substrate, reflects light at least partly through that substrate.
  • the inventors have discovered that as a result of the temperature and pressure constraints imposed during lamination, the creep of the substrate material leads to a random change in the direction of ink pigments, leading to the effect of crinkled or dented metal, as will be described below.
  • the mirror-effect ink is applied on the transparent or translucent substrate and the opaque substrate layer is then placed against the layer of ink thus applied.
  • the ink is applied by screen printing, to obtain sufficient thickness to achieve the required effect.
  • a printing screen with a mesh between 77 and 150 l/cm is used.
  • the final thickness of the applied ink after lamination is typically 5 to 15 ⁇ .
  • the mass of the base layer of substrate is white.
  • the transparent substrate layer and the opaque substrate layer are in PVC.
  • the inventors have observed that the change in ink that results in the required effect does not occur if the substrate is in polycarbonate, for example. That is because with polycarbonate, the lamination parameters, such as temperature and pressure in particular, are different from those used for the substrate layers in PVC and have a negative effect on the ink: change in colour, degradation of the final appearance. Further, because polycarbonate does not creep with lamination, the required crinkled or dented metal effect cannot be seen.
  • the mirror-effect ink is cured by ultraviolet radiation, and is made up of:
  • the lamination step which is suitable for resulting in a change in direction of the pigments of the mirror-effect ink, comprises the following as a minimum:
  • the manufacturing of cards could also comprise additional printing operations, typically offset printing, on one of the two sides of the aforementioned assembly comprising the two layers of substrate enclosing the layer of mirror-effect ink, and conventional operations for placing protective layers on the two sides, printed in this manner or not.
  • additional printing operations typically offset printing, on one of the two sides of the aforementioned assembly comprising the two layers of substrate enclosing the layer of mirror-effect ink, and conventional operations for placing protective layers on the two sides, printed in this manner or not.
  • a layer of ink as defined above is applied on two layers of transparent PVC, and the two layers are placed on each side respectively of the layer of opaque PVC, so as to achieve the crinkled or dented metal effect on both sides of the card made finally.
  • a card can be made with such an effect on only one side, by using an opaque substrate layer and only one transparent or translucent PVC substrate layer on which a layer of mirror-effect ink is applied as indicated above.
  • the invention is also aimed at making a card with a special visual effect, typically obtained using the process described above, where said card comprises an opaque base substrate layer and a translucent or transparent substrate layer, and a layer of mirror-effect printing ink between the two substrate layers, where light is reflected through the translucent or transparent substrate layer, and the layer of printing ink has pigments turned in different directions creating a visual effect of crinkled or dented metal.
  • the thickness of the mirror-effect ink is typically 5 to 15 ⁇ .
  • the transparent or translucent substrate layer and the opaque substrate layer are in PVC.
  • the mirror-effect ink is cured by ultraviolet radiation, and is made up of:
  • the card comprises a median opaque layer in white PVC and comprises on both sides of that opaque layer transparent or translucent substrate layers enclosing between them and the median layer a layer of mirror-effect ink,
  • the card comprises protective layers on both sides.
  • figure 1 is a schematic sectional view of a card according to the invention.
  • figure 2 is a view illustrating the visual appearance of the card after lamination.
  • Figure 1 is a sectional view of a card 1 to standard ISO 7810. That card 1 may for example be a bank card for payment, an identification card, an identity card or a magnetic card, a smart card or a Near Field Communication (NFC) card. It is typically about 0.8 to 1 .2 mm thick.
  • NFC Near Field Communication
  • the card 1 comprises a median base substrate layer 1 1 in opaque white PVC and, on each side of that base layer, a transparent or translucent substrate layer 12 in transparent or translucent PVC.
  • the card further comprises, between the layers of substrate 1 1 and 12, a layer of mirror-effect ink 13 that is about 10 ⁇ thick. That layer of ink, the making of which will be detailed below, reflects the incident light passing through the transparent substrate layer 12 and creates a special random visual effect of dented or crinkled metal, as illustrated in figure 2.
  • the layer 13 of mirror-effect ink may extend over the entire surface of the card 1 , as illustrated in figure 2, but may also extend over only part of the surface.
  • a microchip or an antenna or another electronic component required for the working of the card may be integrated in or between the two layers of substrate 1 1 and 12.
  • the card further comprises, on the opposite sites of the assembly formed by the layers of substrate incorporating the film of mirror ink between them, printing, 14, 15, of the ordinary type, with the offset process, serving informational or decorative purposes.
  • the card further comprises, on each side, a transparent or translucent protective layer 1 6, 17.
  • the card as illustrated in figures 1 and 2, is manufactured as follows.
  • the transparent or translucent substrate layers 1 1 are prepared in a transparent or translucent sheet of PVC.
  • a layer of mirror-effect ink 13 is applied on one side of each layer of transparent or translucent substrate 1 1 using screen printing.
  • the mirror-effect ink is typically ink containing aluminium, designed to create a mirror effect.
  • composition of the ink is typically:
  • the two inked substrate layers are placed on two sides of the opaque substrate layer respectively, which layer is obtained from an opaque PVC sheet, preferably mass-dyed and white.
  • the two transparent substrate layers are set against the opaque substrate layer with the layer of ink near the opaque layer.
  • the card is then laminated, with the application of the two steps below:
  • the fact that the ink deformations are obtained during the conventional step of laminating a multilayer card makes it possible to integrate the achievement of the special visual effect into the standard manufacturing process and thus limit the costs of manufacturing and of creating that visual effect.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

The card comprises an opaque substrate layer (11) in PVC and a translucent or transparent substrate layer (12) in PVC and a layer (13) of mirror-effect printing ink between the two substrate layers, the pigments of which change directions during lamination, where the mirror-effect printing ink layer allows light to be reflected through the translucent or transparent substrate layer and creates a visual effect of crinkled or dented metal.

Description

CARD WITH SPECIAL VISUAL EFFECT AND ASSOCIATED
MANUFACTURING PROCESS
This invention relates to the graphics personalisation of multilayer documents, such as cards compliant with ISO 7810, which will be referred to by the generic term 'cards' in the text below. The invention relates particularly to a process for manufacturing such cards using lamination so as to give them a special visual effect, and the cards obtained thereby.
In order to create a special visual effect on a multilayer document, there is a known process for reproducing on each document a marbled pattern made up of at least two colours by means of printing. However, the pattern is identical for each printed document, and its rendering may be affected by the treatment and protection that is subsequently applied to the document.
Another known means for creating a marbled visual effect is to print a first pattern on the document followed by the printing of a second pattern with ink, which, when the solvents contained in it evaporate, forms cracks through which the first pattern can be seen. The marbled visual effect in this case is random but its rendering may also be affected by the treatment and protection applied subsequently to the document. Further, the use of ink comprising solvents that allow the formation of cracks can lead to additional manufacturing costs because a drying time is required for the solvents to evaporate so that the marbled visual effect is satisfactory.
Also, document EP-2705958 describes a card with a random marbled visual effect obtained as a result of the cracking of a layer printed on a substrate and coated with a translucent protective layer, where cracking occurs when all the layers are laminated together. As a result of such cracking of the printed layer, the surface of the substrate becomes locally visible through the cracks, where the whole can be seen through the protective translucent layer. As a result of the patterns printed first on the substrate and the patterns of the layer that is printed in a second stage and cracked randomly by lamination, the required marbled effects are achieved.
This invention is aimed at proposing a new process for manufacturing cards that makes it possible to obtain a card with a new visual effect that is random and durable over time. It also aims to allow the achievement of the new effect in a simple and economical manner, in steps of a process of the conventional type for making cards such as bank cards, identification cards etc.
With those objectives in mind, the invention is aimed at a process for manufacturing a multilayer card with a special visual effect, of the type where a layer of printing ink suitable for transformation during a lamination stage as a result of the temperature and pressure constraints applied during said lamination of the card is applied between an opaque base substrate layer and a translucent or transparent substrate layer, and said lamination is then carried out.
According to the invention, the process is characterised in that the layer of printing ink comprises mirror-effect ink with pigments that change directions during lamination, resulting in a visual effect of crinkled or dented metal.
Mirror-effect ink is ink which, after it is applied on a transparent or translucent substrate, reflects light at least partly through that substrate.
The inventors have discovered that as a result of the temperature and pressure constraints imposed during lamination, the creep of the substrate material leads to a random change in the direction of ink pigments, leading to the effect of crinkled or dented metal, as will be described below.
In a particular arrangement, the mirror-effect ink is applied on the transparent or translucent substrate and the opaque substrate layer is then placed against the layer of ink thus applied. Preferably, the ink is applied by screen printing, to obtain sufficient thickness to achieve the required effect. Typically, a printing screen with a mesh between 77 and 150 l/cm is used. The final thickness of the applied ink after lamination is typically 5 to 15 μηι.
In another particular arrangement, the mass of the base layer of substrate is white.
In another particular arrangement, the transparent substrate layer and the opaque substrate layer are in PVC. The inventors have observed that the change in ink that results in the required effect does not occur if the substrate is in polycarbonate, for example. That is because with polycarbonate, the lamination parameters, such as temperature and pressure in particular, are different from those used for the substrate layers in PVC and have a negative effect on the ink: change in colour, degradation of the final appearance. Further, because polycarbonate does not creep with lamination, the required crinkled or dented metal effect cannot be seen.
Preferably, the mirror-effect ink is cured by ultraviolet radiation, and is made up of:
V 50 to 93.5% 2-butoxyethanol,
•S 5 to 10% aluminium powder, stabilised,
1 to 2.5% acetone,
•S 0.5 to 1 % 3-(2-aminoethylamino)propyltrimethoxysilane.
In a preferable arrangement, the lamination step, which is suitable for resulting in a change in direction of the pigments of the mirror-effect ink, comprises the following as a minimum:
• a first treatment at temperature ranging from 1 10 to 150 °C with pressure of 80 to 120N/cm2 for 10 to 20 min, • a second treatment at temperature ranging from 14 to 18 °C with pressure of 250 to 290N/cm2 for 10 to 20 min.
In addition to the treatment specific to the invention, the manufacturing of cards could also comprise additional printing operations, typically offset printing, on one of the two sides of the aforementioned assembly comprising the two layers of substrate enclosing the layer of mirror-effect ink, and conventional operations for placing protective layers on the two sides, printed in this manner or not.
In a preferable arrangement, a layer of ink as defined above is applied on two layers of transparent PVC, and the two layers are placed on each side respectively of the layer of opaque PVC, so as to achieve the crinkled or dented metal effect on both sides of the card made finally. However, a card can be made with such an effect on only one side, by using an opaque substrate layer and only one transparent or translucent PVC substrate layer on which a layer of mirror-effect ink is applied as indicated above.
The invention is also aimed at making a card with a special visual effect, typically obtained using the process described above, where said card comprises an opaque base substrate layer and a translucent or transparent substrate layer, and a layer of mirror-effect printing ink between the two substrate layers, where light is reflected through the translucent or transparent substrate layer, and the layer of printing ink has pigments turned in different directions creating a visual effect of crinkled or dented metal.
According to additional particularities:
• the thickness of the mirror-effect ink is typically 5 to 15 μηι.
• the mass of the opaque substrate layer is white.
• the transparent or translucent substrate layer and the opaque substrate layer are in PVC. • preferably, the mirror-effect ink is cured by ultraviolet radiation, and is made up of:
V 50 to 93.5% 2-butoxyethanol,
•S 5 to 10% aluminium powder, stabilised,
1 to 2.5% acetone,
•S 0.5 to 1 % 3-(2-aminoethylamino)propyltrimethoxysilane.
• the card comprises a median opaque layer in white PVC and comprises on both sides of that opaque layer transparent or translucent substrate layers enclosing between them and the median layer a layer of mirror-effect ink,
• the card comprises protective layers on both sides.
Other characteristics and benefits will appear in the description below of a card according to the invention, and the method for manufacturing the card.
Reference will be made to the attached drawings, where:
• figure 1 is a schematic sectional view of a card according to the invention.
• figure 2 is a view illustrating the visual appearance of the card after lamination.
Figure 1 is a sectional view of a card 1 to standard ISO 7810. That card 1 may for example be a bank card for payment, an identification card, an identity card or a magnetic card, a smart card or a Near Field Communication (NFC) card. It is typically about 0.8 to 1 .2 mm thick.
The card 1 comprises a median base substrate layer 1 1 in opaque white PVC and, on each side of that base layer, a transparent or translucent substrate layer 12 in transparent or translucent PVC. The card further comprises, between the layers of substrate 1 1 and 12, a layer of mirror-effect ink 13 that is about 10 μηι thick. That layer of ink, the making of which will be detailed below, reflects the incident light passing through the transparent substrate layer 12 and creates a special random visual effect of dented or crinkled metal, as illustrated in figure 2.
It must be noted that the layer 13 of mirror-effect ink may extend over the entire surface of the card 1 , as illustrated in figure 2, but may also extend over only part of the surface. A microchip or an antenna or another electronic component required for the working of the card may be integrated in or between the two layers of substrate 1 1 and 12.
In the example in figure 1 , the card further comprises, on the opposite sites of the assembly formed by the layers of substrate incorporating the film of mirror ink between them, printing, 14, 15, of the ordinary type, with the offset process, serving informational or decorative purposes. The card further comprises, on each side, a transparent or translucent protective layer 1 6, 17.
The card, as illustrated in figures 1 and 2, is manufactured as follows.
The transparent or translucent substrate layers 1 1 are prepared in a transparent or translucent sheet of PVC.
A layer of mirror-effect ink 13 is applied on one side of each layer of transparent or translucent substrate 1 1 using screen printing.
The mirror-effect ink is typically ink containing aluminium, designed to create a mirror effect.
The composition of the ink is typically:
V 50 to 93.5% 2-butoxyethanol, 5 to 10% aluminium powder, stabilised,
1 to 2.5% acetone,
•S 0.5 to 1 % 3-(2-aminoethylamino)propyltrimethoxysilane
After uniform application of the ink on the two transparent substrate layers, the two inked substrate layers are placed on two sides of the opaque substrate layer respectively, which layer is obtained from an opaque PVC sheet, preferably mass-dyed and white. The two transparent substrate layers are set against the opaque substrate layer with the layer of ink near the opaque layer.
Then the information or decorations 14 and 15 are printed and the protective layers 1 6 and 17 are put in place on each side of the card.
The card is then laminated, with the application of the two steps below:
• a first treatment at high temperature of 130°C with pressure of 100.56 N/cm2 for 15 min,
• a second treatment at low temperature of 1 6°C with stronger pressure of 270.1 N/cm2, also for some 15 min, that sequence of treatments changes the direction of the pigments of the mirror-effect ink, while assembling the different layers that make up the whole, as is well known elsewhere.
Besides, the fact that the ink deformations are obtained during the conventional step of laminating a multilayer card makes it possible to integrate the achievement of the special visual effect into the standard manufacturing process and thus limit the costs of manufacturing and of creating that visual effect.

Claims

1 . A process for manufacturing a multilayer card with a special visual effect, where a layer of printing ink suitable for transformation during a lamination stage is applied between an opaque base substrate layer (1 1 ) and a translucent or transparent substrate layer (12), and said lamination is then carried out,
characterised in that the layer of printing ink (13) comprises mirror- effect ink with pigments that change directions during lamination, resulting in a visual effect of crinkled or dented metal.
2. A process according to claim 1 , characterised in that the mirror- effect ink layer (13) is applied on the transparent or translucent substrate layer (12).
3. A process according to claims 1 or 2, characterised in that the mirror- effect ink layer (13) is applied by screen printing.
4. A process according to claim 1 , characterised in that the thickness of the ink applied is 5 to 15 μηι.
5. A process according to claim 1 , characterised in that the opaque substrate layer (1 1 ) is white.
6. A process according to claim 1 , characterised in that the opaque substrate layer (12) and the transparent or translucent substrate layer are in PVC.
7. A process according to claim 1 , characterised in that the mirror- effect ink comprises:
V 50 to 93.5% 2-butoxyethanol, 5 to 10% aluminium powder, stabilised,
1 to 2.5% acetone,
•S 0.5 to 1 % 3-(2-aminoethylamino)propyltrimethoxysilane.
8. A process according to claim 1 , characterised in that the lamination step, which is suitable for cracking the mirror-effect ink, comprises the following as a minimum:
• a first treatment at temperature ranging from 1 10 to 150 °C with pressure of 80 to 120N/cm2 for 10 to 20 min,
· a second treatment at temperature ranging from 14 to 18°C with pressure of 250 to 290 N/cm2 for 10 to 20 min.
9. A process according to claim 1 , characterised in that a layer of ink (13) is applied on two layers (12) of transparent PVC, and the two layers are placed on each side respectively of the opaque PVC layer (1 1 ), so as to achieve the crinkled or dented metal effect on both sides of the card made finally.
10. A card with a special visual effect, comprising an opaque base substrate layer (1 1 ) and a translucent or transparent substrate layer (12), and a layer of mirror-effect printing ink between the two substrate layers, where light is reflected through the translucent or transparent substrate layer, and the layer of printing ink has pigments turned in different directions creating a visual effect of crinkled or dented metal.
1 1 . A card according to claim 1 1 , characterised in that the thickness of the mirror-effect ink applied is 5 to 15 μηι.
12. A card according to claim 1 1 , characterised in that the mass of the base substrate layer (1 1 ) is white.
13. A card according to claim 1 1 , characterised in that the transparent or translucent substrate layer (12) and the opaque substrate layer (1 1 ) are in PVC.
14. A card according to claim 1 1 , characterised in that it comprises a median opaque layer in white PVC (1 1 ) and comprises on both sides of that opaque layer (1 1 ) transparent or translucent substrate layers (12) enclosing between them and the median layer a layer of mirror-effect ink (13).
15. A card according to claim 1 1 , characterised in that the mirror- effect ink is ink that is cured with ultraviolet radiation, comprising:
V 50 to 93.5% 2-butoxyethanol,
•S 5 to 10% aluminium powder, stabilised,
1 to 2.5% acetone,
•S 0.5 to 1 % 3-(2-aminoethylamino)propyltrimethoxysilane.
PCT/EP2015/080023 2014-12-22 2015-12-16 Card with special visual effect and associated manufacturing process WO2016102274A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14307136.3 2014-12-22
EP14307136.3A EP3037263A1 (en) 2014-12-22 2014-12-22 Card with specific visual effect and method for manufacturing same

Publications (1)

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WO2016102274A1 true WO2016102274A1 (en) 2016-06-30

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WO (1) WO2016102274A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2705958A1 (en) 2012-09-05 2014-03-12 Gemalto SA Card with marbled visual effect and method for manufacturing the same
US20140210200A1 (en) * 2011-04-01 2014-07-31 Giesecke & Devrient Gmbh Optically Variable Security Element Comprising Optically Variable Colour Layer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140210200A1 (en) * 2011-04-01 2014-07-31 Giesecke & Devrient Gmbh Optically Variable Security Element Comprising Optically Variable Colour Layer
EP2705958A1 (en) 2012-09-05 2014-03-12 Gemalto SA Card with marbled visual effect and method for manufacturing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LINGNER MARKETING - WWW.LINGNER.DE / DAS MACHWERK ET AL: "Screen Printing Inks, Screen Stretching Service and Stencil Service, Pad Printing Inks by Proell Services | Products > Special Products", 15 May 2007 (2007-05-15), XP055192941, Retrieved from the Internet <URL:http://web.archive.org/web/20070515070339/http://www.proell.de/html-e/index.php?menu=2,2,2&id=27> [retrieved on 20150602] *

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