JP2002019343A - Multilayer card and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multilayer card which has image information printed by an ink jet recording method and is excellent in resistances to abrasion, water, weather, stains and others of a printed image, and provide a manufacturing method therefor. SOLUTION: In the multilayer card having an over sheet integrally laminated at least on one surface of a core sheet, (a) an ink receiving layer printed by the ink jet recording method is integrally laminated between one or both surfaces of the core sheet and the over sheet, adjacently to the over sheet, and (b) the ink receiving layer formed of a porous resin layer is subjected to hot-pressing treatment, after printed by the ink jet recording method, so that pores of the porous structure thereof be closed up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer card and a method for manufacturing the same, and more particularly, to a certificate card such as a student card, a medical certificate, a license, a member card; an ATM card, a credit card, a cash card, an ID. The present invention relates to a multi-layered card which can be suitably used for a magnetic card such as a card, a health card (Health Card), a debit card (Debit Card); a smart card having an IC chip or the like;

[0002]

2. Description of the Related Art In recent years, cards such as magnetic cards have deeply penetrated into daily life. These cards have a multilayer structure in which a plurality of plastic sheets, papers, and the like are stacked from the viewpoint of data input, display of image information, durability, and the like. For example, in the case of a magnetic card as an example, as shown in FIG. 6, most of the two core sheets 81 and 82 colored white have transparent oversheets 71 and 72 as shown in FIG.
It has a multilayer structure covered with. On one or both sides of the core sheet, image information such as characters, pictures, and photographs is printed.

[0003] The printed surface is protected by a transparent oversheet and is visible through the oversheet. A magnetic layer such as a magnetic stripe 92 is formed on one or both outer surfaces of the oversheet. These layers are integrally laminated by an adhesive or heat and pressure. In general, a magnetic layer such as a magnetic stripe is formed by coating or thermal transfer on the outer surface after other layers are integrally laminated. In general, the laminate is formed as a continuous sheet material, and is finally cut into the shape of a card into a multi-layered card 100 .

[0004] Many multilayer cards, including magnetic cards, have the basic layer configuration described above, including a core sheet and an oversheet, in addition to additional layers such as colored layers and protective layers. In some cases. In a smart card or the like, an IC chip and an electric circuit are arranged in at least one layer.

[0005] In such a multi-layer card, image information such as characters, pictures, and photographs is printed (printed / recorded) on a core sheet or the like. As a method of forming an image, a method by screen printing is generally used. However, screen printing is suitable for printing uniform image information in mass production, but is not necessarily suitable for small-volume production in terms of cost and equipment. In particular, screen printing is not suitable for printing many types of image information in small-scale production.

As a method for forming image information on a multilayer card, a thermal transfer method using a thermal head is advantageous for small-scale production. As a thermal transfer method, a thermal sublimation transfer recording method is generally adopted because it has excellent gradation reproducibility and can form a fine image. Printing of image information by the thermal sublimation transfer method is generally performed by bringing a thermal head into contact with a recording medium such as a core sheet or an oversheet via an ink ribbon to transfer dye from the ink ribbon. However, in the thermal sublimation transfer method, in addition to the problem that the cost is relatively high, uneven printing on the surface of a recording medium such as a core sheet or an oversheet frequently occurs. In particular, when printing is performed on the surface of a core sheet or a multilayer card in which an IC chip, an electric circuit, or the like is embedded, uneven printing due to unevenness becomes severe. Further, in this method, it is necessary to use a dye ink, so that it is difficult to improve the light fastness of an image.

On the other hand, in the ink jet recording system, ink is ejected from a nozzle to form minute droplets, and the droplets are attached to a base material such as paper as pixels corresponding to an electric input signal, thereby forming characters, pictures, and the like. A recording method for forming an image,
It has features such as low noise, high resolution, and high-speed recording.
In the ink jet recording method, a simple and inexpensive ink jet printer having components necessary for printing such as a printer head and an ink cartridge can be used. In addition, the ink jet printer can easily print out color prints simply by adding heads.

As described above, according to the ink jet recording method, a clear image can be formed, color printing can be easily performed, and an image having a desired shape can be easily formed according to an input. Therefore, the ink jet recording method can generally sufficiently cope with a case of small-volume production and a case of printing various kinds of image information in small-volume production. It is.

However, forming image information on a multilayer card by the ink jet recording method has the following problems. In the ink jet recording method, ink that is relatively hard to dry is used in a jet nozzle portion of an ink jet printer in order to prevent the viscosity of the ink from increasing due to drying of the ink and causing ejection failure. That is, in the ink jet recording system, an aqueous ink in which a water-soluble dye, a binder, an additive, and the like are dissolved in water is generally used. For example, when printing such a water-based ink on a core sheet such as a white vinyl chloride resin sheet, drying and fixing of the ink become defective, and a satisfactory image cannot be formed.

Hitherto, in order to use a synthetic resin sheet as an ink jet recording medium, there has been known a method of forming an ink receiving layer exhibiting rapid water absorption on the synthetic resin sheet. Therefore, a method in which such an ink receiving layer is provided on a core sheet and printing is performed by an inkjet recording method is considered. Alternatively, a method is conceivable in which printing is performed by an inkjet recording method using a recording medium having an ink receiving layer formed on a synthetic resin sheet, and this is incorporated into the multilayer structure of a multilayer card.

However, since the conventional ink receiving layer is based on a water-soluble or hydrophilic resin such as polyvinyl alcohol or polyvinylpyrrolidone, the ink-receiving layer is excellent in water absorption, but the printed surface has water or sweat. However, there is a problem of contamination by contact with liquids such as coffee. This problem is difficult to overcome even when the printing surface is covered with the oversheet, because the liquid penetrates from the side surface.
Further, since such an ink receiving layer is very soft as compared with the core sheet, there is a problem that the ink receiving layer is easily damaged even when the oversheet is covered or another protective layer is provided. Another problem is that the conventional ink receiving layer needs to be printed using a dye ink, but the use of the dye ink results in insufficient light fastness of a printed surface.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-layer card having image information printed by an ink jet recording system, and to improve the scratch resistance, water resistance, weather resistance, stain resistance and the like of a printed image. An object of the present invention is to provide an excellent multilayer card and a method for manufacturing the same. Another object of the present invention is to provide a multilayer card having a printed image excellent in light resistance by an ink jet recording system and a method for manufacturing the same.

Another object of the present invention is to have image information printed by an ink jet recording system and to add various functions required for magnetic cards such as cash cards and credit cards, and non-contact IC cards. An object of the present invention is to provide a multilayer card and a method for manufacturing the same.

The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems. As a result, a porous resin layer was used as an ink receiving layer by an ink jet recording method, and after printing on the porous resin layer by an ink jet recording method. A method for closing the porous structure by heat and pressure treatment was conceived. More specifically, an inkjet recording medium having an ink receiving layer made of a porous resin layer on a support is used, or an ink jet recording medium provided with an ink receiving layer made of a porous resin layer on a core sheet is inkjet-printed. Used as a recording medium,
A desired image is printed by an inkjet recording method.

When an oversheet is overlaid on the printed ink receiving layer (printing surface) and an ink jet recording medium is used, a core sheet is disposed below the ink receiving layer and, if necessary, a core sheet is disposed on the other core sheet surface. When the oversheets are also stacked and heated and pressed from both sides, the layers are integrally laminated by heat fusion, and the porous structure of the ink receiving layer is closed. By using a porous resin layer as the ink receiving layer, closing the porous structure after printing, and integrally covering the oversheet, it has excellent scratch resistance, water resistance, weather resistance, stain resistance, etc., A multilayer card having a suitable surface hardness can be obtained. After the ink receiving layer printed by the ink jet recording method is subjected to the heat and pressure treatment, another layer may be overlaid and subjected to the heat and pressure. Further, an adhesive layer can be provided between the respective layers as necessary.

According to the method of the present invention, printing can be performed using a pigment ink, whereby the light resistance of an image can be improved. Further, by adopting such a multilayer structure, various functions can be added by forming a magnetic layer using each layer. The present invention has been completed based on these findings.

[0017]

According to the present invention, there is provided a multi-layer card in which an oversheet is integrally laminated on at least one side of a core sheet, wherein (a) a sheet is provided between one or both sides of the core sheet and the oversheet. An ink receiving layer printed by an inkjet recording method is integrally laminated adjacent to the oversheet, and (b) the ink receiving layer is formed of a porous resin layer; A multi-layer card is provided in which a porous structure is closed by being subjected to a heat and pressure treatment after printing by an ink jet recording method.

Further, according to the present invention, there is provided a method for manufacturing a multilayer card including a step of arranging an oversheet on at least one side of a core sheet and integrally laminating the same. (1) One or both sides of the core sheet and the oversheet In addition, an ink receiving layer composed of a porous resin layer printed by an ink jet recording method is arranged adjacent to the oversheet, and then (2) all the arranged layers are heated and pressed to form each layer. A method for producing a multilayer card is provided, which comprises a series of steps for integrally laminating and closing a porous structure of an ink receiving layer.

Further, according to the present invention, there is provided a method for producing a multilayer card including a step of arranging an oversheet on at least one surface of a core sheet and integrally laminating the oversheet.
Between one or both sides of the core sheet and the oversheet, adjacent to the oversheet, and an ink receiving layer composed of a porous resin layer printed by an inkjet recording method. Disposing an ink receiving layer in which the porous structure is closed, and then (B)
A method for manufacturing a multilayer card is provided, which includes a series of steps of hot-pressing all the arranged layers to integrally laminate the respective layers.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The multilayer card of the present invention has a multilayer structure in which an oversheet is integrally laminated on one or both sides of a core sheet, and is adjacent to one or both oversheets. , An ink receiving layer is arranged below the ink receiving layer.

1. Core Sheet The core sheet generally has a thickness of 2 as shown in FIG.
By using two core sheets, the multilayer card is prevented from being curved, and has an appropriate thickness and strength. As the core sheet, usually, a thermoplastic resin sheet such as a vinyl chloride resin sheet filled with an extender pigment or the like and colored white or milky white is used. By coloring the core sheet white or milky white, concealing properties are imparted, and an image such as a character, a picture, or a photograph can be formed by printing thereon.

In the present invention, such a colored thermoplastic resin sheet can be used as a core sheet.
When the ink receiving layer has a hiding property, it is not limited thereto. If desired, paper can be used as the core sheet, but from the viewpoint of water resistance and durability, a thermoplastic resin sheet is more preferable. Also, if a thermoplastic resin sheet is used as the core sheet, even without using an adhesive,
This is preferable because it can be easily and integrally laminated with another layer by heat and pressure. The core sheet is not limited to two sheets,
One or three or more sheets may be used depending on the thickness, strength, and functions required of the core layer. The total thickness of the core sheet can be appropriately determined according to the purpose of use of the multilayer card, but in the case of a magnetic card or the like, the total thickness is:
Usually 100 to 2000 μm, preferably 100 to 100
It is about 0 μm.

2. As the oversheet , a thermoplastic resin sheet such as a transparent vinyl chloride resin sheet is generally used so that the lower printing surface can be seen. Here, “transparent” means that the printed surface is transparent to the extent that the printed surface can be visually observed, and in some cases, it may be translucent or colored. The oversheet has a role of protecting a lower layer such as a printing surface, imparting appropriate hardness to the surface, and forming a magnetic layer thereon. The oversheet is generally arranged on both sides of the multilayer card, but may be arranged only on one side if necessary. The thickness of the oversheet is not particularly limited, but is usually 4 to 500 µm, preferably about 10 to 200 µm.

3. Ink receiving layer In the multilayer card of the present invention, an ink receiving layer printed by an inkjet recording method is integrally laminated between the core sheet and the oversheet and adjacent to the oversheet. When the oversheet is on both sides, an ink receiving layer may be arranged below both of the oversheets. Alternatively, an ink receiving layer may be arranged below one oversheet, and a core sheet printed by another method such as screen printing may be arranged below the other oversheet.

The ink receiving layer is formed of a porous resin layer. After printing by an ink jet recording method, the ink receiving layer is subjected to a heat and pressure treatment to close the porous structure. As such a porous resin layer, preferably a water-insoluble resin, for example, a porous polyethylene resin film, a porous polypropylene film, a porous polyvinyl butyral resin layer, a porous thermoplastic resin layer such as a porous polyvinyl acetal resin layer Can be mentioned.

In the case of a hydrophobic porous plastic film (including a sheet) such as a porous polyethylene film, in order to improve the absorbability and fixability of the aqueous ink used in the ink jet recording system, the printability is improved. It is desirable to perform a surface treatment with a surfactant.

As a method for forming an ink receiving layer composed of a polymer porous layer such as a porous polyvinyl butyral resin layer and a porous polyvinyl acetal resin layer, for example,
A method is known in which a solution in which a polymer material is dissolved in an amide solvent is applied on a film, and then the surface of the coating layer is brought into contact with water of a poor solvent as spray water (JP-A-8-90)
944, JP-A-9-290577). The contacted spray water diffuses into the solvent in the coating layer and solidifies the polymeric material, thereby forming a porous structure.

As a method for precisely controlling the porous structure such as the pore diameter of the porous resin layer, for example, a coating solution containing a polyvinyl butyral resin, a good solvent thereof, and a poor solvent thereof is coated on a support. And drying. More specifically, a low-boiling organic solvent such as methanol is used as a good solvent, and ion-exchanged water or the like is used as a poor solvent. When the coating liquid is applied on a support, and the drying temperature is controlled, and the drying is performed first from a good solvent, aggregation of the polyvinyl butyral resin occurs, and as a result, a porous structure including continuous pores is formed. According to this method, the porous structure such as the pore diameter can be precisely controlled by selecting the type of solvent, controlling the drying temperature, and the like, and the ink receiving layer exhibits excellent printability even when a pigment ink is used. Can be formed.

The ink receiving layer composed of a porous resin layer is printed by an ink jet recording method, and then subjected to a heat and pressure treatment so that the porous structure is closed. It is effective to uniformly disperse the thermoplastic fine particles in the porous resin layer. The thermoplastic fine particles include styrene (co) polymers such as polystyrene, styrene-methyl methacrylate copolymer, styrene-butadiene copolymer, and styrene-vinyl acetate copolymer;
Fine particles of a thermoplastic (co) polymer such as polyolefin such as polyethylene and ethylene-vinyl acetate copolymer; polyvinyl acetate; and polyamide.

For example, when the polyvinyl butyral resin layer is formed using the coating liquid by the above-described method, the thermoplastic fine particles are converted into an emulsion or dispersion of a thermoplastic (co) polymer into the coating liquid. Preferably it is supplied. The average particle size of the thermoplastic fine particles is preferably 0.01 to 20 μm, more preferably 0.03 to 1 μm.
5 μm. The average particle size is a value measured by the Coulter counter method. It is preferable to use thermoplastic fine particles having a minimum film forming temperature, a melting point, or a softening point higher than the drying temperature so as not to form a film in the drying step. The thermoplastic fine particles are used in an amount of 10 to 250 parts by weight based on 100 parts by weight of the polymer forming the porous resin layer.

It is preferable that the porous resin layer contains inorganic fine particles in order to enhance the ink absorbency. Examples of the inorganic fine particles include alumina, silica, titania, and calcium carbonate. As the alumina, a fine powder of aluminum oxide in a γ-type crystal form (for example, a fine powder having an average primary particle diameter of about 13 nm) is preferable. As the silica, colloidal silica and fumed silica are preferable. The inorganic fine particles are the polymer 1 forming the porous resin layer.
It is usually used in a proportion of 200 parts by weight or less, more preferably 150 parts by weight or less, based on 00 parts by weight. If the proportion of the inorganic fine particles is too small, the effect of improving the ink absorbency is small. If the proportion is too large, the porous resin layer may become brittle.

When the porous resin layer is formed of polyvinyl butyral resin or the like, a hydrophobic thermoplastic resin is contained in order to improve the film-forming properties and to improve properties such as strength, water resistance and weather resistance. Can be. Examples of such a hydrophobic thermoplastic resin include a polyurethane resin, a styrene acrylonitrile resin, a polyester resin, an acrylate resin, and anion or cation modified products of these resins. When a hydrophobic thermoplastic resin is used, the polymer 100 forming the porous resin layer may be used.
50 parts by weight or less, preferably 30 parts by weight,
It is used in a proportion of not more than 10 parts by weight, more preferably not more than 10 parts by weight. Also, in order to improve the weather resistance of the porous resin layer,
An ultraviolet absorber, an ultraviolet stabilizer, an antioxidant, a colorant, a pigment, and other fillers can be contained.

The average pore diameter of the porous resin layer can be appropriately selected according to the type of ink used, but is usually about 0.01 to 10 μm, preferably about 0.1 to 8 μm. The thickness of the porous resin layer is not particularly limited, but is usually 5 to 100 μm, preferably about 10 to 80 μm.

4. The porous resin layer constituting the ink receiving layer of the ink jet recording medium is usually provided on a support for printing by the ink jet recording method. When the porous resin layer is an independent film such as a porous polyethylene film, an ink receiving layer composed of the porous polyethylene film can be provided on the support by lamination with the support. Like a porous polyvinyl butyral resin layer,
When the porous resin layer is formed using a coating liquid, an ink jet recording medium integrated with the support can be provided by applying the coating liquid on the support and drying the coating.

The support is not particularly limited, and various forms of various materials can be used. Usually, a sheet-like substrate is suitably used. As the sheet-like base material, a synthetic resin sheet having heat resistance, dimensional stability, rigidity and the like is preferable. Examples of such a synthetic resin sheet include a sheet (including a film) formed of a synthetic resin such as polyester such as polyethylene terephthalate (PET), cellulose triacetate, polycarbonate, polyvinyl chloride, polypropylene, and polyimide. it can. The thickness of the sheet substrate is
Although it can be appropriately determined according to the application, it is usually 10 to 1
It is about 00 μm. Among these, thickness 25-10
A 0 μm stretched PET film is particularly preferred.

As the support, a synthetic resin sheet having excellent transparency can be used. If a photographic image is desired, a synthetic pigment having a white hiding property is imparted by kneading an extender such as titanium oxide. Use a resin sheet. Further, a sheet-like base material other than a synthetic resin sheet such as synthetic paper or coated paper can be used as a support. On the surface of the support, if necessary, to improve the adhesion, after providing a primer layer, or after performing corona discharge treatment,
A porous resin layer may be formed thereon.

In the present invention, a porous resin layer formed on a support is used as an ink jet recording medium, and printing is performed using an ink jet printer. Alternatively, a core sheet may be used instead of the support, and a porous resin layer may be formed thereon as an ink receiving layer. Or,
When the synthetic resin sheet having the above-described white hiding property is used as a support, the synthetic resin sheet may be used as a core sheet.

Thus, in the present invention, as shown in FIG. 1, the porous resin layer 1 is provided on the ink jet recording medium 10 (FIG. 1a) in which the porous resin layer 1 is provided on the support 2 or the core sheet 3. Inkjet recording medium 11 (FIG. 1)
Using b), printing is performed on the surface of the porous resin layer by an ink jet recording method. An ink receiving layer may be formed on both sides of the core sheet.

After printing on the surface of the porous resin layer by the ink jet recording method, heat and pressure treatment is performed to close the porous structure. The pores of the porous structure may be formed by heat-pressure treatment in the state of the above-described ink jet recording medium, or may be formed by overlaying the printed ink jet recording medium with another layer such as an oversheet to form the entire layer. When heat-pressing and laminating integrally, a method of simultaneously closing holes may be adopted.

5. Multilayer Card FIGS. 2 and 3 show specific examples of the layer configuration of the multilayer card of the present invention. FIG. 2 (2 a) shows an ink jet recording medium 1 in which an ink receiving layer (porous resin layer) 1 is provided on a support 2.
0 is disposed adjacent to the lower layer of the oversheet 41, and a multilayer card 51 having a layer configuration in which two core sheets 31, 32 and the oversheet 42 are disposed thereunder is shown. FIG 2 (2b), the ink-receiving layer on the support 21 and the (porous resin layer) 1 inkjet recording medium 10A having a, and the ink jet recording medium 10B of the ink-receiving layer 1 is provided on the support member 22 A multi-layer card 52 having a layer configuration arranged on both sides is shown.

In FIG. 3 (3 a), the ink jet recording medium 11 having the ink receiving layer (porous resin layer) 1 provided on the core sheet 31 is arranged adjacent to the lower layer of the oversheet 41, , A core card 32 and a multi-layer card 61 having a layer structure in which an oversheet 42 is disposed. FIG. 2B shows an ink jet recording medium 11A having an ink receiving layer 1 provided on a core sheet 31.
And a multilayer card 62 having a layer configuration in which an ink jet recording medium 11B provided with an ink receiving layer 1 on a core sheet 32 is disposed on both sides.

The layer structure of these multilayer cards is merely an example, and the present invention is not limited to these. As described above, the core sheet can have one layer or three or more layers. It is also possible to form a single core sheet and form ink receiving layers on both sides thereof. Also,
The oversheet on the side where the ink receiving layer is not formed may be omitted. Furthermore, the multilayer card according to the invention may have other additional layers arranged.

Since the multilayer card of the present invention can print image information by an ink jet recording method, even in the case of small-volume production, it is necessary to print various types of image information in small-volume production. Even if there is, it is possible to respond. The image is clear, easily colored, and easily formed into a desired shape according to the input.

The multilayer card of the present invention can be printed not only with dye ink but also with pigment ink having excellent weather resistance and light resistance. After printing using an inkjet printer, to close the porous structure, and, to integrally laminate the oversheet on the ink receiving layer,
A multilayer card excellent in scratch resistance, water resistance, weather resistance, stain resistance and the like can be obtained. In particular, after the ink receiving layer is printed, since the porous structure is closed by heat and pressure treatment, water seepage from the side of the ink receiving layer is prevented,
In addition, improvements in water resistance and color density, high cohesion of the receiving layer, and the like have been made.

The multilayer card of the present invention can be used for a magnetic card or an IC.
When used as a card or the like, for example, a magnetic layer can be provided, or an IC chip or an electric circuit pattern can be embedded. The magnetic layer is usually formed on the oversheet by coating or thermal pressure transfer. The magnetic layer may be provided on the inner surface side of the oversheet. Alternatively, a magnetic layer may be formed on the outer surface of the oversheet, and another oversheet may be further provided thereon as a protective layer. The magnetic layer can be formed on one or both sides of the multilayer card. The IC chip and the electric circuit pattern can be provided on the oversheet or the core sheet. IC
When a chip or an electric circuit pattern is embedded in a core sheet or sandwiched between core sheets, the core sheet that has been subjected to such processing in advance can be used for lamination. By mounting various functional components in this manner, a multi-layer card provided with functionality can be obtained.

6. The manufacturing method Figure 4 and 5 of the multilayer card, a specific example of a method for manufacturing a multilayer card according to the present invention. However, in the manufacturing method shown in FIGS. 4 and 5, each layer configuration is an example, and the present invention is not limited to this. As described above, there are many types of layer configurations of the multilayer card.

In the method shown in FIG. 4, (1) ink-jet recording is performed using an ink-jet printer on the surface of the ink-receiving layer of the ink-jet recording medium 10 in which the ink-receiving layer 1 (porous resin layer) is provided on the support 2. (2) arranging the oversheet 41 on the ink receiving layer of the printed ink jet recording medium, arranging the core sheets 31 and 32 below the support of the ink jet recording medium, Over sheet 4 under sheet 32
And (3) heating and pressurizing (hot pressing) all of the arranged layers so as to integrally laminate the respective layers, and at the same time, to close the porous structure of the ink receiving layer. Through a series of steps, the multilayer card 51A is manufactured.

In the method shown in FIG. 5, (1) ink-jet recording is performed using an ink-jet printer on the surface of the ink-receiving layer of the ink-jet recording medium 10 in which the ink-receiving layer 1 (porous resin layer) is provided on the support 2. (2) heat-pressing the printed inkjet recording medium to close the porous structure of the ink receiving layer,
(3) Place the oversheet 41 on the ink receiving layer,
A core sheet 3 is provided under the support of the ink jet recording medium.
A step of disposing the oversheet 42 below the core sheet 32; and (4) heating and pressurizing (heating and pressing) all of the disposed layers to integrally laminate the respective layers. The multilayer card 51B is manufactured through a series of steps.

According to these manufacturing methods, after printing on the surface of the ink receiving layer, each layer is laminated,
Even when a layer in which a C chip or an electric circuit is embedded or sandwiched is interposed, print quality is not impaired due to unevenness caused by the layer.

In order to apply heat pressure to all layers or to heat-press the ink receiving layer, a method using a press machine or passing between hot rolls can be adopted. The conditions of the heat and pressure treatment are not particularly limited as long as the layers can be integrally laminated. The heat treatment temperature is usually about 60 to 180 ° C. The pressure for pressurization is usually about 1 to 40 kg / cm ² .

The stamping of the laminate into the shape of a card is usually carried out after manufacturing a laminated body integrated by heat and pressure or after passing through an additional processing step such as forming a magnetic layer on the laminate. It is. However, depending on the case, it is also possible to obtain a multilayer card in the form of a card by cutting each layer into a card shape in advance and laminating them together by heat and pressure. Alternatively, each layer other than the oversheet may be punched into a card shape, and the oversheet may be coated thereon.

[0052]

EXAMPLES Example 1 10 g of polyvinyl butyral resin was dissolved in 130 g of methanol, and then Aerosil Al ₂ O ₃ .C (average primary particle diameter of 13 g) was added to the obtained solution.
6 g of γ-type aluminum oxide fine particles (nm, manufactured by Nippon Aerosil Co., Ltd.) were mixed to prepare a solution A. AP-6730
[Styrene / acrylic type thermoplastic fine particles, solid content concentration 4
5%, Showa Polymer Co., Ltd.] and 28 g of ion-exchanged water.
After adding 5 g, 17 g of methanol was carefully added so as not to cause a shock, thereby preparing a solution B. Thereafter, the solution A and the solution B were mixed to obtain a coating liquid for an ink receiving layer.

One side of a 36 μm-thick polyester film [Melinex 339, easily adhesive-treated film, manufactured by Teijin Dupont Film Co., Ltd.] was coated on a bar coater so that the coating thickness after drying was 50 μm. And apply
Next, the ink was dried at 65 ° C. for 1 minute and further at 75 ° C. for 1 minute to obtain an ink jet recording medium having an ink receiving layer formed of a porous polyvinyl butyral resin layer.

After a target print was recorded on the surface of the ink receiving layer of this ink jet recording medium using an ink jet printer, a 100 μm thick
Under the support (polyester film), two white vinyl chloride sheets having a thickness of 280 μm, and a transparent vinyl chloride sheet having a thickness of 100 μm as a lower layer. A press plate having a mirror surface is applied to both surfaces of these layers, and a pressure of 15 kg / cm ² is applied by a press machine.
The heat and pressure treatment was performed at a temperature of 120 ° C. for 1 hour.
After that, a card having a smooth surface was obtained by punching into a card size using a punching machine.

Example 2 Polyester film having a thickness of 36 μm [Melinex 339, easily adhesive-treated film,
Teijin Dupont Film Co., Ltd.] and an adhesive [Seikabond E-263 (solid content concentration 63%) / crosslinking agent C-26]
(Solid content 40%) = 15/3 mixed solution, solid content 10 wt%, manufactured by Dainichi Seika]
The coating was dried at an oblique angle of 55 μm) and dried, followed by dry lamination with KH2055M (manufactured by Mitsubishi Chemical Corporation) as a porous polyethylene film. Gravure coater (120 oblique, plate depth 55 μm) on the adhered porous film surface
At a solid content of 10% by weight to obtain an ink jet recording medium.

After a target print is recorded on the surface of the ink receiving layer (porous polyethylene film) of the ink jet recording medium by an ink jet printer, a 100 μm thick transparent vinyl chloride sheet is placed on the ink receiving layer of the ink jet recording medium. Two white vinyl chloride sheets having a thickness of 280 μm and a transparent vinyl chloride sheet having a thickness of 100 μm were further disposed below the white vinyl chloride sheets. A press plate having a mirror surface is applied to both surfaces of all layers, and a pressure of 15 kg / cm is applied by a press machine.
^{2. The} heat and pressure treatment was performed at a temperature of 120 ° C. for 1 hour. After that, a card having a smooth surface was obtained by punching into a card size using a punching machine.

Example 3 10 g of polyvinyl butyral resin was dissolved in 130 g of methanol, and Aerosil Al ₂ O ₃ · C (average primary particle size: 1) was added to the obtained solution.
6 g of 3 nm γ-type aluminum oxide fine particles (manufactured by Nippon Aerosil Co., Ltd.) was mixed to prepare solution A. AP-673
0 [styrene / acrylic type thermoplastic fine particles, solid content concentration 45%, Showa Polymer Co., Ltd.]
After the addition of 3.5 g, 17 g of methanol was carefully added so as not to cause a shock, thereby preparing a solution B. Thereafter, the solution A and the solution B were mixed to obtain a coating liquid for an ink receiving layer.

One side of a 36 μm-thick polyester film [Melinex 339, easily adhesive-treated film, manufactured by Teijin Dupont Film Co., Ltd.] was coated on a bar coater so that the coating thickness after drying was 50 μm. And apply
Next, drying was performed at 65 ° C. for 1 minute and further at 75 ° C. for 1 minute to obtain an ink jet recording medium having an ink receiving layer formed thereon.

After recording the target print on the ink receiving layer (porous polyvinyl butyral resin layer) of the ink jet recording medium using an ink jet printer,
The ink jet recording medium was subjected to heat and pressure treatment between a heating roll and a pressure roll set at 130 ° C. to close the porous structure of the ink receiving layer. Next, on the ink receiving layer of the ink jet recording medium, a transparent vinyl chloride sheet having a thickness of 100 μm, two white vinyl chloride sheets having a thickness of 280 μm, and a transparent vinyl chloride sheet having a thickness of 100 μm were further disposed below. A press plate having a mirror surface is applied to both surfaces of all the layers, and a pressure of 15 kg / c is applied by a press machine.
The heat and pressure treatment was performed over 1 hour under the conditions of m ² and a temperature of 120 ° C. After that, a card having a smooth surface was obtained by punching into a card size using a punching machine.

Example 4 Polyester film having a thickness of 36 μm [Melinex 339, an easily adhesive-treated film,
Teijin Dupont Film Co., Ltd.] and an adhesive [Seikabond E-263 (solid content concentration 63%) / crosslinking agent C-26]
(Solid content 40%) = 15/3 mixed solution, solid content 10 wt%, manufactured by Dainichi Seika]
The coating was dried at an oblique angle of 55 μm) and dried, followed by dry lamination with KH2055M (manufactured by Mitsubishi Chemical Corporation) as a porous polyethylene film. The surface of the adhered porous film was treated with a surfactant EMULGEN 408 (manufactured by Kao Corporation) at a solid concentration of 10 wt% using a gravure coater (120 slant, plate depth 55 μm) to obtain an ink jet recording medium.

After a target print is recorded on the surface of the ink receiving layer (porous polyethylene film) of the ink jet recording medium using an ink jet printer, the ink jet recording medium is subjected to a heat and pressure treatment, and the ink receiving layer is porous. The structure was closed. Thereafter, a transparent vinyl chloride sheet having a thickness of 100 μm was placed on the ink receiving layer of the ink jet recording medium, two white vinyl chloride sheets having a thickness of 280 μm were placed below, and a transparent vinyl chloride sheet having a thickness of 100 μm was further placed below. A press plate having a mirror surface is applied to both surfaces of all the layers, and a pressure of 15 kg / c is applied by a press machine.
The heat and pressure treatment was performed over 1 hour under the conditions of m ² and a temperature of 120 ° C. After that, a card having a smooth surface was obtained by punching into a card size using a punching machine.

[Comparative Example 1] Aqueous dispersion of Aerosil Al ₂ O ₃ · C (gamma-type aluminum oxide fine particles having an average primary particle diameter of 13 nm, manufactured by Nippon Aerosil Co., Ltd.) having a solid content of 30% by weight
50 g and polyvinyl alcohol (Kuraray Co., PVA2
35) 120 g of a solid content of 10% was mixed to prepare a coating liquid. The amount of the coating liquid after drying on a polyethylene terephthalate (PET) film having a thickness of 36 μm is 3 μm.
Coating was performed using a bar coater so as to be 0 g / m ² . After drying, an ink jet recording medium was obtained.

After a target print is recorded on the surface of the ink receiving layer (PVA layer) of the ink jet recording medium using an ink jet printer, a 100 μm thick transparent vinyl chloride sheet is formed on the ink receiving layer of the ink jet recording medium. 280μm thick white vinyl chloride sheet 2 below
And a transparent vinyl chloride sheet having a thickness of 100 μm as a lower layer. A press plate having a mirror surface is applied to both surfaces of these layers, and a pressure of 15 kg / cm is applied by a press machine.
^{2. The} heat and pressure treatment was performed at a temperature of 120 ° C. for 1 hour. After that, a card having a smooth surface was obtained by punching into a card size using a punching machine.

Comparative Example 2 10 g of a polyvinyl butyral resin was dissolved in 130 g of methanol, and then Aerosil Al ₂ O ₃ .C (average primary particle size: 1) was added to the obtained solution.
6 g of 3 nm γ-type aluminum oxide fine particles (manufactured by Nippon Aerosil Co., Ltd.) was mixed to prepare solution A. AP-673
0 [styrene / acrylic type thermoplastic fine particles, solid content concentration 45%, Showa Polymer Co., Ltd.]
After adding 3.5 g, 17 g of methanol was carefully added so as not to cause a shock, thereby preparing a solution B. Thereafter, the solution A and the solution B were mixed to obtain a coating liquid for an ink receiving layer.

One side of a 36 μm-thick polyester film [Melinex 339, easily adhesive-treated film, manufactured by Teijin Dupont Film Co., Ltd.] was coated on a bar coater so that the coating thickness after drying was 50 μm. And apply
Next, the ink was dried at 65 ° C. for 1 minute and further at 75 ° C. for 1 minute to obtain an ink jet recording medium having an ink receiving layer formed of a porous polyvinyl butyral resin layer.

After a target print is recorded on the surface of the ink receiving layer (porous polyvinyl butyral resin layer) of the ink jet recording medium by using an ink jet printer, the ink jet recording medium is subjected to a heat and pressure treatment to thereby form the ink receiving layer. The porous structure was closed. No oversheet was placed on the ink receiving layer of this ink jet recording medium, and two white vinyl chloride sheets having a thickness of 280 μm and a transparent vinyl chloride sheet having a thickness of 100 μm were further disposed below the oversheet. . A press plate having a mirror surface is applied to both surfaces of all layers, and a pressure of 15 kg / cm ² is applied by a press machine.
The heat and pressure treatment was performed at a temperature of 120 ° C. for 1 hour.
After that, a card having a smooth surface was obtained by punching into a card size using a punching machine.

[Comparative Example 3] 10 g of polyvinyl butyral resin was dissolved in 130 g of methanol, and then Aerosil Al ₂ O ₃ · C (average primary particle diameter of 1 g) was added to the obtained solution.
6 g of 3 nm γ-type aluminum oxide fine particles (manufactured by Nippon Aerosil Co., Ltd.) was mixed to prepare solution A. AP-673
0 [styrene / acrylic type thermoplastic fine particles, solid content concentration 45%, Showa Polymer Co., Ltd.]
After adding 3.5 g, 17 g of methanol was carefully added so as not to cause a shock, thereby preparing a solution B. Thereafter, the solution A and the solution B were mixed to obtain a coating liquid for an ink receiving layer.

One side of a 36 μm-thick polyester film [Melinex 339, easily adhesive-treated film, manufactured by Teijin Dupont Film Co., Ltd.] was coated on a bar coater so that the coating thickness after drying was 50 μm. And apply
Next, the ink was dried at 65 ° C. for 1 minute and further at 75 ° C. for 1 minute to obtain an ink jet recording medium having an ink receiving layer formed of a porous polyvinyl butyral resin layer.

Under the ink jet recording medium, a thickness of 28
Two white vinyl chloride sheets having a thickness of 0 μm and a transparent vinyl chloride sheet having a thickness of 100 μm were further disposed below the white vinyl chloride sheets. A press plate having mirror surfaces on both surfaces of all layers was applied, and a heat-pressure treatment was performed by a press machine at a pressure of 15 kg / cm ² and a temperature of 120 ° C. for 1 hour. Thereafter, printing was performed on the surface of the ink receiving layer by an inkjet printer.

Comparative Example 4 A polyester film having a thickness of 36 μm [Melinex 339, an easily adhesive-treated film,
Teijin Dupont Film Co., Ltd.], apply an adhesive [SK, solid content concentration 10 wt%, manufactured by Dainichi Seika] with a gravure coater (120 oblique, plate depth 55 μm), dry, and then use a porous polyethylene film. Dry lamination was performed with a certain KH2055M (manufactured by Mitsubishi Chemical Corporation). A gravure coater (120 inclined, plate depth 55
μm) surfactant Emulgen 408 [Kao Corporation
The solid content concentration was 10 wt% to obtain an ink jet recording medium.

The thickness 2 below the ink jet recording medium
Two 80 μm white vinyl chloride sheets and a 100 μm thick transparent vinyl chloride sheet were further disposed below the white vinyl chloride sheets. A press plate having mirror surfaces on both surfaces of all layers was applied, and a heat-pressure treatment was performed by a press machine at a pressure of 15 kg / cm ² and a temperature of 120 ° C. for 1 hour. Thereafter, printing was performed on the surface of the ink receiving layer by an inkjet printer.

<Evaluation of Physical Properties, etc.> (1) Print Evaluation Print evaluation was performed by printing a pigment ink with a pigment ink jet printer [ink label writer "Tevra" JET JPC770 manufactured by King Jim Co., Ltd.]. . Ink Absorbability The solid printed portion was touched with a finger, and it was observed whether or not ink adhered to the finger. A case where the ink did not adhere 30 seconds after printing was evaluated as good (良好), and a case where the ink adhered was evaluated as poor (×).

(2) Lettering test The lettering stick (No. 3) was pressed for 20 seconds with a load of 0.3 kg weight from the vertical direction of the surface of the ink receiving layer, and no trace was left (残). A case where a small amount was left was marked (（), and a mark was left (x). (3) Water resistance The prepared multilayer card was immersed in water for 24 hours, and the case where no water permeated the ink receiving layer was good (）), and the case where water permeated the ink receiving layer was poor (×). And

[0074]

[Table 1]

[0075]

According to the present invention, there is provided a multi-layer card having image information printed by an ink jet recording system, wherein the multi-layer card has excellent scratch resistance, water resistance, weather resistance, stain resistance and the like of a printed image. And a method for manufacturing the same.
Further, according to the present invention, there is provided a multilayer card having a printed image excellent in light resistance by an ink jet recording system and a method for manufacturing the same. Furthermore, according to the present invention, a multi-layer card having image information printed by an ink jet recording system and capable of adding various functions required for a magnetic card such as a cash card, a credit card, a non-contact IC card, and the like. A manufacturing method is provided.

The multilayer card of the present invention is excellent in light resistance and scratch resistance by performing a heat and pressure treatment as compared with the heat-sensitive sublimation transfer method, and can cope with small-volume printed matter. Further, according to the present invention, an image with high reproducibility can be recorded even if the multilayer card has irregularities. In the method for producing a multilayer card of the present invention, the ink receiving layer printed and recorded in advance is heat-pressure fused to form a multilayer card, so that the smoothness of the card is improved. Therefore, the vibration of the card when reading the magnetic information is reduced, and the magnetic reading failure can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a specific example of a layer configuration of an inkjet recording medium.

FIG. 2 is a sectional view showing a specific example of a layer configuration of the multilayer card of the present invention.

FIG. 3 is a sectional view showing another specific example of the layer configuration of the multilayer card of the present invention.

FIG. 4 is an explanatory diagram showing a specific example of a step of integrally laminating each layer by performing a heat-pressure treatment.

FIG. 5 is an explanatory view showing another specific example of a step of integrally laminating each layer by performing a heat-pressure treatment.

FIG. 6 is an explanatory diagram showing a specific example of a layer configuration of a conventional magnetic card.

[Explanation of symbols]

 1: ink receiving layer 2: support 3: core sheet 10: inkjet recording medium 10A: inkjet recording medium 11: inkjet recording medium 11B: inkjet recording medium 21: support 22: support 31: core sheet 32: core sheet 41 : Over sheet 42: Over sheet 51: Layer configuration of multilayer card 51 A: Layer configuration of multilayer card 51 B: Layer configuration of multilayer card 52: Layer configuration of multilayer card 61: Layer configuration of multilayer card 62: Layer configuration of multilayer card 71 : Over sheet 81: core sheet 82: core sheet 91: printing 92: magnetic stripe 100: magnetic card

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06K 19/06 B41J 3/04 101Y 19/077 G06K 19/00 BK (72) Inventor Kazuhiko Yanagisawa Tokyo 2-3-3 Sekiguchi, Bunkyo-ku Nichiban Co., Ltd.F-term (reference) BA05 BB02 BB09 CA01

Claims (17)

[Claims] 1. A multilayer card in which an oversheet is integrally laminated on at least one side of a core sheet,
(A) between one or both surfaces of the core sheet and the oversheet, an ink receiving layer printed by an ink jet recording method is integrally laminated adjacent to the oversheet, and (b) The ink receiving layer,
A multilayer card formed of a porous resin layer, which is printed by an ink jet recording method and then subjected to a heat and pressure treatment so that a porous structure is closed. 2. The multilayer card according to claim 1, wherein said ink receiving layer is an ink receiving layer provided on a support, and said support is also integrally laminated. 3. The multilayer card according to claim 1, wherein said ink receiving layer is provided on a surface of a core sheet. 4. The multilayer card according to claim 1, wherein said ink receiving layer is formed from a porous thermoplastic resin layer. 5. The multilayer card according to claim 4, wherein said ink receiving layer is formed of a porous thermoplastic resin layer containing thermoplastic fine particles. 6. The multilayer card according to claim 4, wherein said ink receiving layer is formed of a porous thermoplastic resin layer containing inorganic fine particles. 7. The multilayer card according to claim 4, wherein said ink receiving layer is formed of a porous thermoplastic resin layer containing thermoplastic fine particles and inorganic fine particles. 8. The multilayer card according to claim 1, wherein the ink receiving layer is printed with a pigment ink by an ink jet recording system. 9. The multilayer card according to claim 1, wherein a magnetic layer is further formed on the outer surface or the inner surface of at least one of the outer layers. 10. The multilayer card according to claim 1, wherein an IC chip is further arranged on at least one of the layers. 11. An electric circuit pattern is further arranged on at least one of the layers.
The multilayer card according to any one of the above. 12. A method for manufacturing a multilayer card including a step of disposing an oversheet on at least one surface of a core sheet and integrally laminating the oversheet, wherein (1) an oversheet is provided between one or both surfaces of the core sheet and the oversheet. Next to the sheet, an ink receiving layer made of a porous resin layer printed by an ink jet recording method is further arranged, and then (2) all the arranged layers are heated and pressed to laminate each layer integrally. And a series of steps for closing the porous structure of the ink receiving layer. 13. The method according to claim 12, wherein the ink receiving layer is an ink receiving layer provided on a support, and the support is disposed together with the ink receiving layer. 14. The method according to claim 12, wherein said ink receiving layer is provided on a surface of a core sheet. 15. A method for manufacturing a multilayer card comprising a step of arranging an oversheet on at least one side of a core sheet and integrally laminating the oversheet, wherein (A) an oversheet is provided between one or both sides of the core sheet and the oversheet. Adjacent to the sheet, there is further disposed an ink receiving layer comprising a porous resin layer printed by an ink jet recording method, wherein the ink receiving layer has been subjected to a heat and pressure treatment and the porous structure is closed. Then, (B) a method for manufacturing a multilayer card, comprising a series of steps of hot-pressing all the arranged layers and integrally laminating each layer. 16. The method according to claim 15, wherein the ink receiving layer is an ink receiving layer provided on a support, and the support is disposed together with the ink receiving layer. 17. The method according to claim 15, wherein the ink receiving layer is provided on a surface of a core sheet.