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
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
  • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
• • 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
  • B32B29/00—Layered products comprising a layer of paper or cardboard
• • 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
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal 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
  • B32B15/092—Layered products comprising a layer of metal comprising metal 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 comprising epoxy resins
• • 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
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal 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
  • B32B15/095—Layered products comprising a layer of metal comprising metal 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 comprising polyurethanes
• • 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
  • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
• • 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
  • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
• • 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
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• • 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
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
  • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
  • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
  • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
• • 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
  • B32B2307/402—Coloured
• • 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
  • B32B2307/402—Coloured
  • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
• • 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
  • B32B2554/00—Paper of special types, e.g. banknotes
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
  • D21H27/30—Multi-ply
  • D21H27/32—Multi-ply with materials applied between the sheets

Definitions

• the present invention relates to a security paper for, for example, tickets, in the form of a laminate which comprises at least two laminate layers with at least one paste layer therebetween.
• the term "security paper” is taken in this patent application to signify a sheet-shaped material, possibly stored in the rolled-up state, on which text and images are intended to be printed or applied, and which is intended to be used for travel tickets, lottery tickets and other securities for short-term use.
• the sheet-shaped material includes not only paper fibre but also other materials such as, for example, paste, plastic, glass fibre and metal foil.
• European Patent Application carrying publication number 0 453 131 discloses a security paper which is built up in two layers with a paste layer therebetween. On the inside of one or both of the paper layers, authenticity indicators are printed. The optical properties of the paste between the paper layers is such that the authenticity indicators are practically invisible in reflected light but are visible in transmitted light. It is also possible to design the authenticity indicator such that it can only be discovered with invisible light or with magnetic aids.
• the disadvantages inherent in a paper type according to this patent application is that it either requires good light conditions in order to discover an authenticity indicator which is visible in transmitted light, or special technical aids for discovering the authenticity indicators which can only be discovered with the aid of magnetism or invisible light.
• EP 0 491 099- Al shows a security tape which is built up from a plurality of layers of material, viz. a plastic film, two layers of adhesive material and a protective layer which is drawn off when the tape is put into use.
• the layer of adhesive material which lies most proximal the plastic film adheres best to this film and is, moreover, coloured.
• the coloured adhesive material adheres less well to the barrier material than to the plastic film.
• the adhesive material which is most proximal the substrate to which the tape is bonded has a strongly adhesive capability.
• the tape When the tape is torn off from the substrate, a pattern appears since the coloured adhesive material accompanies the plastic film apart from at those places which are provided with the barrier material.
• the invention is principally intended to create tamper-proof closures or seals which cannot be opened without this becoming apparent. It is also conceivable that the tape is employed for authenticity inspection, for example such that each authentic document is provided with a length of the tape which cannot be moved over to a forgery.
• a major disadvantage is that an authenticity inspection entails that the authenticity of the tape is inspected in that it is pulled off so that the characteristic pattern appears. This procedure entails that a genuine document would appear as a forgery on a second inspection. After all, during long train journeys, tickets are often inspected more than once.
• the present invention has for its object to realise a security paper whose authenticity may simply be verified without access to specific technical aids.
• the method of production is also cost-effective, but is not available to the general public.
• the object forming the basis of the present invention is attained if the security paper disclosed by way of introduction is characterized in that at least one paste layer has a colour which differs from the adjacent layers.
• Fig. 1 is a cross section through a torn security paper according to the present invention, the rupture having taken place in a first manner;
• Fig. 2 is a view corresponding to that of Fig. 1, the rupture having taken place in a second manner;
• Fig. 3 is a straight top plan view of the security paper according to Fig. 1, when a corner has been torn off;
• Fig. 4 is a cross section through the security paper according to a second embodiment.
• Fig.5 schematically illustrates the production of a laminate.
• Fig. 1 shows a security paper 1 according to the present invention.
• the security paper 1 consists of two laminate layers 2, 3 and a paste layer 4 located therebetween.
• the thickness of the laminate layers is considerably greater than the thickness of the paste layer.
• the Figure also shows the rupture surface 5 which occurs when the paper is torn.
• the interfaces between the layers 2 and 4 and between the layers 3 and 4, respectively have been exposed. This entails that the paper and the torn-off edge will have an appearance which is shown schematically in Fig. 3.
• the material in both the laminate layers and in the paste layer must be selected with great care.
• the laminate layers are, for example, plastic, paper or metal of such a thickness and mechanical strength that it is possible to tear up the finished laminate without major difficulty.
• the finished laminate must, however, withstand a certain normal handling without coming apart.
• the paste layer suitably consists of a curing or setting adhesive.
• the so-called two can adhesives polyurethane or epoxy glue can be employed.
• the joint between the paste layer 4 and the laminate layers 2, 3 must be stronger than the inner strength of the layers, so that the coloured paste layer is reliably exposed when the paper 1 is torn. In other words, the strength at right angles to the plane of the paper must be less than the strength of the joint between the paste and the laminate layer.
• the paste 4 penetrates a slight distance into the laminate layers 2 and 3, on condition that these are more or less porous. In those - normally occurring - cases when at least one of the laminate layers 2, 3 surrounding the paste layer 4 consists of paper, this results in the paper fibres forming a reinforcement in the paste layer. The reinforcement affords increased strength to the joint between paper and paste.
• the laminate layer 2, 3 ruptures at the border between the area which is unaffected by the paste and the area in which the paste has penetrated.
• This type of rupture is shown in Fig. 1, while Fig. 2 shows an example of a rupture which has taken place in the paste layer rather than in the joints.
• the paste or adhesive 4 is of the curing or setting type, so that, after lamination, it can neither be dissolved nor melted. This is vital to prevent the replacement of any of the laminate layers and by such means make possible a forgery.
• the lamination of the security paper 1 proceeds in accordance with that technique which is illustrated schematically in Fig. 5.
• a laminate layer, the so-called noble film 8 is led from the magazine reel 9 through the roller pair
• the roller 11 is coated in the bath 12 with paste which is applied also to the film 8 when this passes through the roller pair 10, 11.
• the noble film coated with paste is thereafter led a shorter or longer distance, during which time a certain drying may possibly take place, to the so-called lamination nip between the rollers 13 and 14.
• the coated noble film is laminated together with an additional lamination layer 15 which is unwound from the magazine reel 16.
• the laminate 1 has been formed and this is led to the magazine reel 17.
• a distinctive feature of the paper according to the present invention is that a colour pigment has been admixed into the paste. If a two can adhesive is employed, the colour pigment is suitably admixed into one of the two components which together make up the adhesive.
• Fig. 4 shows an alternative embodiment of the present invention.
• the laminate 1 has been provided with an additional laminate layer 7 which is united with the other laminate layers with the aid of a paste layer 6.
• the paste layers 4 and 6 may have the same colour, but may also be of different colours in order to give a clearly distinguished rupture surface on being torn.
• the laminate layers 2, 3, 7 may have mutually identical colours, but also be of colours which differ from one another. In general, the point of interest is that the colours and the thickness of the laminate layers 2, 3, 7 and the paste 4, 6, respectively are selected such that the paste layers 4, 6 do not shine through the outer laminate layers 2, 7.
• the laminate 1 with additional paste layers and laminate layers.
• the laminate layers are often paper, but may also be of other materials, such as plastic or metal foil.
• one or more of the paste layers consist of a plastic foil which may possibly be coloured.

Landscapes

• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Finance (AREA)
• Laminated Bodies (AREA)
• Paper (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20411735

Family Applications (1)

Country Status (5)

Cited By (4)

Citations (2)

• 1998
  • 1998-06-17 SE SE9802154A patent/SE513878C2/sv not_active IP Right Cessation
• 1999
  • 1999-05-20 EP EP99931650A patent/EP1090186A1/en not_active Withdrawn
  • 1999-05-20 AU AU48093/99A patent/AU4809399A/en not_active Abandoned
  • 1999-05-20 WO PCT/SE1999/000856 patent/WO1999066127A1/en active Application Filing
• 2000
  • 2000-12-13 NO NO20006364A patent/NO20006364L/no unknown

Patent Citations (2)

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