JPS6211637A - Laminated sheet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention Purpose of the Invention [Industrial Field of Application] The present invention provides a sticker for use in manufacturing cards having a magnetic recording medium that is difficult to forge and easy to distinguish between genuine and false. Regarding the mating sheet.

[Background Art] In recent years, cards with magnetic recording media have become extremely popular and are used in a wide range of applications, including cash cards, bank passbooks, credit cards, train tickets, coupon tickets, and commuter passes. As these magnetic cards become more popular, there are people who misuse them by forging or copying them.
There is a need for technology to prevent this and accurately determine the authenticity of cards.

Problem to be Solved by the Invention 1 The object of the present invention is to meet the above requirements, effectively prevent forgery, and easily determine the authenticity even if forgery is made.
To provide a laminated sheet for manufacturing cards that can eliminate fake cards.

Structure of the Invention [Means for Solving the Problems] The laminated sheet of the present invention has an infrared reflective layer and an infrared absorbing layer laminated in this order from the inside to the outside on one side of a base material, It is characterized by having an adhesive layer on the other side, and may have a magnetic recording layer between each layer on either side of the base material.

The laminated sheet of the present invention has various aspects, which will be explained below with reference to the drawings.

In the embodiment shown in FIG. 1, a magnetic recording layer 2, an infrared reflecting layer 3, and an infrared absorbing layer 4 are laminated in this order from inside to outside on one side of a base material 1, and on the other side. It has an adhesive layer 8.

In the embodiment shown in FIG. 2, an infrared reflective layer 3 and an infrared absorbing layer 4 are arranged on one side of the base material 1 from the inside to the outside.
are laminated in this order and have an adhesive layer 8 on the other side.

In the embodiment shown in FIG. 3, a magnetic recording layer 2 made of a material with high infrared transmittance is provided on one side of the base material 1', an infrared absorbing layer 4 is provided outside of the magnetic recording layer 2, and the base material 1' serves also as an infrared reflective layer and has an adhesive layer 8 on the other side.

In the embodiment shown in FIG. 4, an infrared absorbing layer 4 is provided on one side of a base material 1', the base material 1' also serves as an infrared reflective layer, and has an adhesive layer 8 on the other side.

In the embodiment shown in FIG. 5, an infrared reflective layer 3, a magnetic recording layer 2 made of a material with high infrared transmittance, and an infrared absorbing layer 4 are arranged on one side of the base material 1 from the inside to the outside in this order. and has an adhesive layer 8 on the other side.

In the embodiment shown in FIG. 6, a magnetic recording layer 2' made of a material with high infrared reflectance and an infrared absorbing layer 4 are laminated in this order from the inside to the outside on one side of the base material 1. The magnetic recording layer 2' also serves as an infrared reflective layer, and the other side has an adhesive M8.

In the embodiment shown in FIG. 7, a magnetic recording layer 2 made of a material with high infrared transmittance is provided on one side of the base material 1, an infrared absorbing layer 4 is provided externally from the magnetic recording layer 2, and an infrared absorbing layer 4 is provided on the other side. It has an adhesive layer 8' which also serves as a reflective layer.

In the embodiment shown in FIG. 8, an infrared absorbing layer 4 is provided on one side of the base material 1, and an adhesive layer 8' which also serves as an infrared reflecting layer is provided on the other side.

As shown in FIGS. 1 to 8, the laminated sheet of the present invention preferably includes a hiding layer 5,
One or more types of the printing layer 6 and the protective layer 7 are provided in this order when two or more types are used.

The base material is sheet-like or plate-like, and its materials include nylon, cellulose diacetate, cellulose triacetate, and polystyrene.

Plastics such as polyethylene, polypropylene, polyester, polyimide, polycarbonate, metals such as copper and aluminum, paper, impregnated paper, etc. can be used alone or as a composite. A preferable material may be selected from the above-mentioned materials in consideration of the physical properties required of the base material, such as strength, rigidity, hiding power, and light opacity.

The thickness of the base material is approximately 0.005 to 5 mm. When it also serves as an infrared reflective layer, milky white polyester is preferred.

The magnetic recording layer is T Fe2O3, CO coated @T-Fe2
03. Fe5o4. CrO2, Fe, Fe-Cr,
Fe-Go, Co-Cr, Go-Ni
.

Known magnetic fine particles such as MnAl, Ba ferrite, and 3r ferrite dispersed in a suitable resin or ink vehicle can be formed on a substrate by a coating method such as a gravure method, a roll method, or a knife method.

The magnetic recording layer may also include Fe, Fe-Cr, Fe
-Co, Co-Cr, etc. 1 metal or alloy,
It can also be formed as a thin film on a base material by vacuum evaporation, sputtering, plating, or the like.

When forming the magnetic recording layer by coating, the film thickness is 1
-100μ, preferably about 5-10μ. When the magnetic recording layer is formed by vacuum evaporation, sputtering, or plating, the film thickness is 1008 to 1 μm, preferably 500 μm.
~10008.

Examples of the resin or ink vehicle for dispersing magnetic fine particles such as γ-Fe2O3 include butyral resin, vinyl chloride-vinyl acetate copolymer resin, urethane resin, polyester resin, cellulose resin, acrylic resin, and styrene-maleic acid copolymer resin. If necessary, a rubber resin such as nitrile rubber, a urethane elastomer, etc. are added.

The infrared reflective layer is formed using a paint or ink obtained by dispersing a pigment with high infrared reflectance in a binder. Binders include cellulose derivatives such as ethyl cellulose, ethyl hydroxyethyl cellulose, cellulose acetate propionate, and cellulose acetate, styrene resins such as polystyrene, poly-α-methylstyrene, polymethyl methacrylate, polyethyl methacrylate, and polyethyl acrylate. , acrylic or methacrylic resins such as butyl polyacrylate, rosin, rosin-modified malein Hf'! resin, rosin-modified phenolic resin, polymerized rosin, etc., gin ester resin, polyvinyl acetate resin, coumaron (sting resin, vinyl toluene resin, vinyl chloride resin, polyester resin, polyurethane resin, butyral resin, etc.). If necessary, a plasticizer and other various additives may be used.The layer may be formed by a conventional coating or printing method such as a gravure method, a roll method, a knife method, or an offset method.

The magnetic recording layer is made of Fe, Fe-Cr, Fe-C
o.

If the magnetic recording layer is formed using a metal or alloy such as C0-Cr by vacuum evaporation, sputtering, plating, etc., the magnetic recording layer can also serve as an infrared reflective layer. Furthermore, Ding e, Sn, In, AI.

Metals such as 3i, pb, and Zn, their alloys, and T
A film of a compound such as e-carbide can also be formed by vacuum evaporation, sputtering, plating, etc. to serve as an infrared reflective layer.

The infrared absorbing layer is formed at a desired position by coating or printing a material in which quinocyanines, thiacyanins, and the like having high infrared absorbance are dispersed in a binder similar to that used for the infrared reflective layer.

The concealing layer is formed by applying or printing the same binder as above and adding various pigments that transmit infrared rays or do not transmit visible light to form a paint or ink.

The printing layer is provided by printing a desired pattern using a known ink and printing method. Like the hiding layer, it is preferable to use an ink that reflects or absorbs visible light and transmits infrared rays.

The protective layer can be formed by laminating a synthetic resin film, extrusion coating, or applying a synthetic resin paint. The synthetic resin constituting the protective layer may be the same as the synthetic resin used to form the reflective layer, taking into consideration the intended use and adhesion with other layers.

The use of a thermosetting synthetic resin is advantageous in terms of surface hardness and prevention of contamination, and it is particularly preferable to use a paint containing an ultraviolet curable synthetic resin because it can be cured instantly after application.

The adhesive layer is necessary for binders such as salt acetic acid copolymer, ethylene-vinyl acetate copolymer, salt pyropropionic acid copolymer, rubber resin, cyanoacrylate resin, cellulose resin, ionomer, and polyolefin. It can be formed on a desired portion of a substrate by coating means such as gravure, roll, knife, etc. using a paint for an adhesive layer prepared by adding additives and kneading with a solvent or diluent.

[Function] When infrared rays are irradiated onto cards having magnetic recording media manufactured using the laminated sheet of the present invention, the portions where the infrared absorbing layer 4 is present hardly reflect infrared rays, while the portions where the infrared absorbing layer 4 is not present reflect the infrared rays. Since the infrared reflective layer 3 is provided inside, the infrared rays are reflected at a high rate. Based on this difference in reflectance, characters and patterns can be read and authenticated. Since the difference in reflectance is large, misreading is virtually zero.

In a preferred embodiment in which a concealing layer 5 that transmits infrared rays is provided on the infrared absorbing layer 4, the presence of the infrared absorbing layer 4 is not even detected, so that characters and patterns cannot be visually distinguished.

If you print M6 such as background pattern, pattern, and letters on top of it,
Enhance the effect even more.

[Example 1] A magnetic paint having the following composition was prepared. (All "parts" are parts by weight.) T Fe2O3 [T MRDJ (Titan Kogyo) 75 parts Partially saponified vinyl chloride vinyl acetate copolymer resin "Vinyrite VAGHJ (UCC) 10 parts Polyurethane elastomer resin "Zambren 1B114
BJ (Sanyo Chemical Industries) 25 parts Cotton-like saturated polyester resin "Vylon Rv53SS" (Toyobo) 10 parts Isopropyl alcohol 50 parts Methyl ethyl ketone 50 parts Toluene
50 parts Isocyanate curing agent FAT Mytic NY-220AJ (Mitsubishi Kasei)
This magnetic paint was gravure coated on one side of a polyester film base material (3 parts, 273 parts in total) with a thickness of 50 microns to form a magnetic recording layer with a thickness of 10 microns.

A paint for an infrared reflective layer having the following formulation was prepared.

Partially saline raw salt vinyl vinyl acetate copolymer resin [Vinyrite VAGHj 20 parts White pigment 10 parts Isocyanate curing agent [Takenate D11ONj (Soken Yakuhin Kogyo) 3 parts Methyl ethyl ketone 30 parts Toluene
30 parts total 93 parts This paint for an infrared reflective layer was gravure coated on the magnetic recording layer to form an infrared reflective layer with a thickness of 2 μm.

A paint for an infrared absorbing layer having the following formulation was prepared.

Partially carbonated raw salt vinyl acetate copolymer resin [Vinyrite VAGHj 20 parts Pigment rIR750J (Nippon Herbal Medicine) 10 parts Isocyanate hardening agent "Takenate D11ONJ (Soken Yakuhin Kogyo) 3 parts Methyl ethyl ketone 30 parts Toluene
30 parts, 93 parts in total This paint for an infrared absorbing layer was coated in a barcode pattern on the infrared reflective layer by gravure printing to form an infrared absorbing layer with a thickness of 2 μm.

A coating for a concealing layer was prepared with the following formulation.

Partially saponified vinyl chloride vinyl acetate copolymer resin [VINYLITE V A G HJ 20
Part pigment 10 parts Isocyanate curing agent [Takenate D11ONj (Narita Pharmaceutical Industries) 3 parts Methyl ethyl ketone 30 parts Toluene
30 parts in total, 93 parts This coating material for the hiding layer was gravure coated on the infrared adsorption layer to form a hiding layer with a thickness of 1 μm.

A printing layer paint having the following formulation was prepared.

Partially saponified chloride vinyl acetate copolymer resin “Vinyrite VAGHJ 20 parts Pigment 10 parts Isocyanate curing agent [Takenate D11ONJ (Narita Pharmaceutical Industries) 3 parts Methyl ethyl ketone 30 parts Toluene
30 copies total 93 copies Gravure printing was carried out on the hiding layer using this printing layer paint,
A printed layer with a thickness of 1 μm was formed.

A protective layer paint having the following formulation was prepared.

Polyvinyl butyral resin [S-LEC BXj (Tsukumizu Kagaku) 3 parts Moisture-curing urethane resin [Olestar M95-50AJ (Mitsui Toatsu) 3 parts Methyl ethyl ketone 30 parts Toluene
30 parts ethyl acetate
30 parts total 96 parts This paint for a protective layer was gravure coated on the printing layer to form a protective layer with a thickness of 0.5 μm.

A paint for the adhesive layer was prepared with the following formulation.

Vinyl chloride vinyl acetate copolymer resin “Denkarac 721J (
Electrochemistry') 10 parts acrylic resin
20 parts toluene
80 parts ethyl acetate
80 parts total 190 parts This paint for adhesive layer was gravure coated on the other side of the base material to form an adhesive layer with a thickness of 10 μm.

The laminated sheet formed in the above order was of the form shown in FIG. 1, and was laminated to a card base material to produce a card having a magnetic recording medium.

This card has good performance in both writing and reading information, and it is easy and accurate to determine authenticity using infrared rays, which is rare.

Next, a laminated sheet of the embodiment shown in FIG. 2 was obtained in the same manner as above except that the magnetic recording layer was not provided.

This was bonded to a card base material having a magnetic recording medium on one side to form a card. This card had similar performance.

[Example 21 A magnetic recording layer, an infrared absorbing layer, a hiding layer, a printing layer and The laminated sheet in which the protective layer is formed in this order and the adhesive layer is formed on the other side is of the embodiment shown in Fig. 3, and this is laminated to a card base material to have a magnetic recording medium. Manufactured cards. This card also had the same performance as the product of Example 1.

Next, 1 q of laminated sheets of the embodiment shown in FIG. 4 were prepared in the same manner as above except that no magnetic recording layer was provided.

The card produced using this also had the same performance as the product of Example 1.

[Example 3] An infrared reflective layer, a magnetic recording layer, an infrared absorbing layer, a hiding layer, a printing layer and a protective layer were coated on one side of a polyester film substrate with a thickness of 50 μm using the same paint as in Example 1. A laminated sheet in which the layers are formed in this order and an adhesive layer is formed on the other side is of the embodiment shown in Fig. 5, and is laminated to a card base material to form a card with a magnetic recording medium. was manufactured.

This card also had the same performance as the product of Example 1.

(Example 4) On one side of a polyester film base material with a thickness of 50 μm, GO-Ni was deposited to a thickness of 500 μm using a vacuum deposition method to form a magnetic recording layer that also served as an infrared reflective layer. .
Subsequently, using the same paint as in Example 1, an infrared absorbing layer, a hiding layer, a printing layer, and a protective layer were formed in this order on this magnetic recording layer, and an adhesive layer was formed on the other side. The laminated sheet was of the form shown in FIG. 6, and was laminated to a base material to produce a card having a magnetic recording medium.
This card also had the same performance as the product of Example 1.

[Example 5] An adhesive paint having the following formulation was prepared.

Vinyl chloride vinyl acetate copolymer resin “Denkarac 721J”
10 parts acrylic resin
20 parts toluene
80 parts ethyl acetate
80 parts white pigment 1
0 parts total 200 parts A magnetic recording layer, an infrared absorbing layer, a hiding layer, a printing layer and a protective layer were coated on one side of a 50 μm thick polyester film base material in this order using the same paint as in Example 1. An adhesive layer that also served as an infrared reflective layer was formed on the other side using the above-mentioned adhesive paint. The obtained laminated sheet had the form shown in FIG. 7, and the cards manufactured using this sheet and having a recording medium on the .mu. side had the same performance as the product of Example 1.

Next, a laminated sheet of the embodiment shown in FIG. 8 was obtained in the same manner as above except that the magnetic recording layer was not provided.

The card produced using this also had the same performance as the product of Example 1.

Effects of the Invention The laminated sheet of the present invention can be used to manufacture cards with magnetic recording media, even though the presence of the magnetic recording layer is relatively easily known and may be copied. Since the presence of the infrared reflective layer and absorbing layer is not easily detected, there is little risk of counterfeiting. Therefore, even if there is a counterfeit product in which only the magnetic recording layer is copied, the product cannot be affected by infrared rays, so it can be immediately recognized as a counterfeit product and can be eliminated. A conventional device can be used to write information to the magnetic recording layer, and a means for determining the difference in infrared reflectance for reading only needs to be added.

In a preferred embodiment in which a hiding layer, a printed layer, and a protective layer are provided, the hiding layer makes it difficult to detect that the infrared absorbing layer is provided, and the printed layer further enhances the effect. In addition,
The protective layer protects entries such as commuter passes or credit cards from abrasion and provides durability for items that need to be carried and presented over long periods of time.

[Brief explanation of drawings]

1, 2, 3, 4, 5, 6, 7, and 8 are schematic diagrams showing various aspects of the structure of the laminated sheet of the present invention. FIG. 1-...Base material 1'...Base material 2 which also serves as an infrared reflective layer...Magnetic recording layer 2'...Magnetic recording layer 3 which also serves as an infrared reflective layer...Infrared reflective layer 4... - Infrared absorbing layer 5... Hiding layer 6... Printing layer 7... Protective layer 8... Adhesive layer 8'... Adhesive layer that also serves as an infrared reflecting layer Patent applicant
Dai Nippon Printing Co., Ltd. Agent Patent Attorney Souo Suga Figure 1 Figure 2111 Figure 3 @ Figure 4 Figure 6

Claims (11)

[Claims] (1) An infrared reflective layer and an infrared absorbing layer are laminated in this order from the inside to the outside on one side of the base material, and an adhesive layer is provided on the other side. A laminated sheet that may have a magnetic recording layer between each layer on one side. (2) A magnetic recording layer, an infrared reflective layer, and an infrared absorbing layer are laminated in this order from the inside to the outside on one side of the base material, and an adhesive layer is provided on the other side. 1
Laminated sheet. (3) The adhesive according to claim 1, which has an infrared reflective layer and an infrared absorbing layer laminated in this order from the inside to the outside on one side of the base material, and an adhesive layer on the other side. Combined sheet. (4) A magnetic recording layer made of a material with high infrared transmittance is provided on one side of the base material, and an infrared absorbing layer is provided outside of it, and the base material also serves as an infrared reflective layer and is adhered to the other side. The laminated sheet according to claim 1, which has an agent layer. (5) The laminated sheet according to claim 1, wherein an infrared absorbing layer is provided on one side of the base material, the base material also serves as an infrared reflective layer, and an adhesive layer is provided on the other side. (6) An infrared reflective layer, a magnetic recording layer made of a material with high infrared transmittance, and an infrared absorbing layer are laminated in this order from the inside to the outside on one side of the base material, and an adhesive is applied on the other side. The laminated sheet according to claim 1, which has a layer. (7) A magnetic recording layer made of a material with high infrared reflectance and an infrared absorbing layer are laminated in this order from the inside to the outside on one side of the base material, so that the magnetic recording layer reflects infrared rays. The laminated sheet according to claim 1, which also serves as a layer and has an adhesive layer on the other side. (8) A magnetic recording layer made of a material with high infrared transmittance is provided on one side of the base material, an infrared absorbing layer is provided outside of the magnetic recording layer, and an adhesive layer that also serves as an infrared reflective layer is provided on the other side. A laminated sheet according to claim 1 having the following. (9) The laminated sheet according to claim 1, which has an infrared absorbing layer on one side of the base material and an adhesive layer that also serves as an infrared reflective layer on the other side. (10) Any one of claims 1 to 9, wherein one or more of a hiding layer, a printed layer, and a protective layer are provided outside the infrared absorbing layer, and in the case of two or more, in this order. That laminated sheet. (11) A laminated sheet according to any one of claims 1 to 10, which is used for manufacturing commuter passes or credit cards.