JP2774749B2 - Magnetic card - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a magnetic recording layer such as a credit card, a bank cash card, an identification card and the like, and a desired area such as letters and numerals is embossed on a predetermined area. Related to a magnetic card.

[0002]

2. Description of the Related Art A magnetic card in which a magnetic recording layer is provided in a predetermined direction in a predetermined width on a substrate made of a thermoplastic resin, and a predetermined area such as letters, numerals, and the like are applied by embossing, It is widely used as a credit card, bank card, identification card, refueling card, shopping card, and the like. These conventional magnetic cards are based on a thermoplastic resin sheet such as vinyl chloride,
Further, the magnetic recording layer is called a magnetic stripe and is made of PET.
(Polyethylene terephthalate) It is formed by thermally transferring or attaching a magnetic layer on a tape or the like to a desired portion on a substrate in a stripe shape.

FIGS. 1 and 2 show the outline of the configuration.
FIG. 1 shows a conventional magnetic card, in which a magnetic card 10 has a substrate 21 and 22 of a vinyl chloride sheet on which characters and patterns 41 and 42 are printed, respectively, and a transparent and transparent character and patterns 41 and 42. A magnetic stripe 31 thermally transferred or attached to a protective layer 34 of a vinyl chloride sheet,
Further, letters and numbers 43 and 44 by emboss processing
Consists of In this configuration, the magnetic stripe 31 restricts the printing surface of characters, designs, etc. 41 and restricts the degree of freedom of design, which hinders high design.
Recently, in order to increase the degree of freedom of this design, as shown in FIG. 2, a concealing layer 32 is provided on the entire surface of the substrate 23 to which the magnetic stripe 31 has been transferred, and letters, designs, etc. 41 are printed on the concealing layer 32. The number of magnetic cards 10 that protect printing with a protective layer 33 is increasing. However, magnetic stripe 3
In order to form the concealing layer 32 for concealing the magnetic stripe 31, a special concealing technique for concealing a step, a color difference and the like between the magnetic stripe 31 and the substrate 23 of the transparent vinyl chloride sheet onto which the magnetic stripe 31 is transferred or adhered is required. And hindered productivity improvement. Furthermore, this magnetic stripe 31
There has been a demand for improvements in terms of material cost and production cost, for example, is relatively expensive, and it is difficult to perform alignment during transfer or sticking formation or alignment during card cutting, resulting in poor yield.

Therefore, in order to solve the above-mentioned conventional problems and to provide an inexpensive and stable magnetic card and a method of manufacturing the same, a magnetic recording layer and a concealing layer,
There is a proposal to sequentially form a design layer (Japanese Patent Laid-Open No. 48-233).
No. 37, JP-A-54-73608, JP-A-2
-249696). Although the magnetic card according to this proposal certainly solves the problems of material cost and production cost, if desired items such as letters and numbers are applied to predetermined positions of the magnetic card by embossing, the magnetic coating of the embossed portion is broken. , Peeling and chipping occur, exposing the base,
There is a problem that the appearance is significantly impaired, which impairs the commercial value and is undesirable.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional magnetic card and to apply desired items such as characters and numerals to a predetermined position of the magnetic card by embossing. Another object of the present invention is to provide a magnetic card that does not cause cracking, peeling, or chipping of the magnetic film of the embossed portion and has good electromagnetic conversion characteristics.

[0006]

According to the present invention, a magnetic recording layer is provided on at least one entire surface of a substrate made of a thermoplastic resin, and a desired area such as a character or a numeral is applied to a predetermined area by embossing. Wherein the magnetic recording layer is formed of a magnetic film having a coercive force of 300 Oe or more in a magnetic powder content of 70% by weight or more and a tensile elongation at break of 50% or more. A magnetic card characterized by the following. Further, the main components of the magnetic recording layer are composed of a magnetic powder, a binder and a polyisocyanate, and the binder is a vinyl chloride-vinyl acetate copolymer, a polyvinyl butyral resin, a styrene-maleic acid resin and a rosin-modified maleic resin. One or more resins A selected from the group of
0 kg / cm ² or less and / or tensile elongation at break 100%
A resin B having the above properties, wherein the resin B is a polyester resin, a polyurethane resin, an ethylene-vinyl acetate copolymer, a polyvinyl chloride resin containing a conventional plasticizer, and a vinyl chloride containing a conventional plasticizer. A magnetic card selected from the group of vinyl acetate copolymers, wherein a concealing layer and a design layer are sequentially formed on the magnetic recording layer, and the magnetic recording layer is a coating layer or a transfer layer; It is. Electronic parts such as ICs may be embedded inside the magnetic card.

Hereinafter, the configuration of the magnetic card of the present invention will be described with reference to the drawings. FIG. 3 shows an example of the magnetic card 10 of the present invention. 21 and 22 are thermoplastic resin sheets such as polyvinyl chloride which can be embossed, 31 is a magnetic recording layer formed on the entire surface of one surface of the base 21,
32 is a concealing layer for concealing the color of the magnetic recording layer 31;
42 is a pattern layer formed by various printing means, 33 is a protection layer of the pattern layer 41 formed by various printing means, and 34 is a transparent and embossable polyvinyl chloride which is a protection layer of the pattern layer 42 And the like. Reference numerals 43 and 44 denote desired items such as characters and numbers by embossing. In this magnetic card 10, as shown in FIG. 4, first, a magnetic recording layer 31 is formed over the entire surface of one surface of a substrate 21 made of a thermoplastic resin sheet such as polyvinyl chloride. This magnetic recording layer 31 has a coercive force 30
It contains 70% by weight or more of magnetic powder of 0 Oe or more, and the finally formed magnetic film has a tensile elongation at break of 50%.
% Is applied and dried by a conventionally known coating method such as a gravure method, a roll method, or a knife edge method to a film thickness of 1 to 50 μm, preferably about 3 to 20 μm. It is formed so that it becomes. This magnetic recording layer 31 is a coating layer. Further, the thickness of the magnetic recording layer 31 is set to 0.
A concealing layer 32 having a thickness of 01 to 10 μm is formed, and a pattern layer 41 and a protective layer 33 thereof are sequentially laminated on the upper layer by various printing means to form the magnetic sheet 11. This magnetic sheet 11
Is called a coating method.

As a method for forming the magnetic sheet 11, as shown in FIG.
No. 5 containing 70% by weight or more of magnetic powder having a coercive force of 300 Oe or more over the entire surface above the release layer 35, and adjusting the composition so that the finally formed film has a tensile elongation at break of 50% or more. The thickness of the obtained magnetic paint is from 1 to 50 μm, preferably from 3 to 20 μm by a conventionally known coating method such as a gravure method, a roll method, and a knife edge method.
The magnetic recording layer 31 is formed by coating and drying to the extent that the magnetic recording layer 31 has an adhesive layer 36, and the magnetic recording layer 31 side is entirely coated on one side of the base 21 made of a thermoplastic resin sheet such as polyvinyl chloride. After transfer by applying pressure or heat and pressure, the support 25 is peeled off, and a thickness of 0.01 mm is formed on the transferred magnetic recording layer 31 by a known method.
A concealing layer 32 having a thickness of 10 to 10 μm is formed, and a pattern layer 41 and its protective layer 33 are successively laminated by various printing means on the upper layer to form the magnetic sheet 11, or as shown in FIG.
On the release layer 35 of the support 25 on which the release layer 35 has been formed, a concealing layer 32 having a thickness of 0.01 to 10 μm is formed by a known method.
A gravure method, a roll method, a knife, and a magnetic paint containing 70% by weight or more of a magnetic powder of 0 Oe or more and blended and adjusted so that the finally formed coating film has a characteristic of a tensile elongation at break of 50% or more. By a conventionally known coating method such as an edge method, the film thickness is 1 to 50 μm, preferably 3 to 20 μm.
The magnetic recording layer 31 is formed by coating and drying so as to have a thickness of about μ, and the magnetic recording layer 31 is formed on one side of a base 21 made of a thermoplastic resin sheet such as polyvinyl chloride via an adhesive layer 36. Then, the support 25 is peeled off and transferred onto the concealing layer 32 and the concealing layer 32 of the magnetic recording layer 31 which have been transferred.
The pattern layer 41 and its protective layer 33 are sequentially laminated by various printing means to form the magnetic sheet 11, or as shown in FIG. 7, the release layer 35 of the support 25 on which the release layer 35 is formed.
A protective layer 33 and a design layer 41 are stacked on the pattern layer 41 by various printing means, and a concealing layer 32 having a thickness of 0.01 to 10 μ is formed on the design layer 41 by a known method. A gravure method is used to prepare a magnetic paint containing 70% by weight or more of magnetic powder having a coercive force of 300 Oe or more over the entire surface and blended and adjusted so that the finally formed film has a characteristic of a tensile elongation at break of 50% or more. The film thickness is from 1 to 50 by a conventionally known coating method such as a roll method and a knife edge method.
μ, preferably about 3 to 20 μm, to form a magnetic recording layer 31 by coating and drying. A base made of a thermoplastic resin sheet such as polyvinyl chloride is provided on the magnetic recording layer 31 side via an adhesive layer 36. 21 is brought into close contact with the entire surface of one of the surfaces and transferred by pressing or heating and pressing.
And the magnetic sheet 11 can be formed. 5, 6, and 7 is referred to as a transfer method, and the magnetic recording layer 31 formed by this method is a transfer layer.

Next, a design layer 42 is formed on one surface of the substrate 22 by various printing means, and a protective layer 34 of a transparent sheet and the magnetic sheet 11 are formed on the upper and lower surfaces of the substrate 22.
4 are arranged as shown in FIG. 4, and thermocompression bonding or bonding with an adhesive is performed by a hot press. Thereafter, it is stamped and formed into a desired size, and characters and numerals 43 and 44 are formed in a predetermined area by embossing to obtain a magnetic card 10 having the structure shown in FIG. Further, an electronic component such as an IC may be embedded inside the card. In the above example, the number and thickness of the bases 21 and 22 and the protective layer 34 are
There is no particular limitation. For example, as shown in FIG. 8, the base 22 may be omitted to form a two-layer structure, or the protective layer 34 may be omitted as shown in FIG. However, in the case of a one-layer configuration, the hot pressing step is omitted, and the protective layer 33 is laminated on the design layer 42 by various printing means. Further, the magnetic sheets 11 are arranged such that the base 21 is on the inner side as shown in FIG. 10 and bonded by heat pressing or bonding with an adhesive, and then punching and forming into a desired size. Characters and numerals 43 and 44 by embossing may be formed in the area of, and the magnetic card 10 having the structure shown in FIG.

Next, the magnetic recording layer 31 of the magnetic card 10 according to the present invention will be described in detail. First, one or more resins A selected from the group consisting of a vinyl chloride-vinyl acetate copolymer, a polyvinyl butyral resin, a styrene-maleic acid resin, and a rosin-modified maleic resin are preferably 50% by weight or less in the binder. Use 5-30% by weight,
Magnetic powder having a coercive force of 300 Oe or more (for example, γ
-Fe ₂ O ₃ , Co-attached γ-Fe ₂ O ₃ , Fe ₃ O ₄ , C
rO ₂ , Fe, Fe—Cr, Fe—Co, Co—Cr,
Co-Ni, MnAl, Ba ferrite, Sr ferrite, etc.) are primarily dispersed. Here, the amount of the magnetic powder is 70% by weight or more of the finally formed magnetic film. Then, polyester resin, polyurethane resin, ethylene-
With a tensile strength at break of 500 kg / cm ² or less selected from the group of a vinyl acetate copolymer, a polyvinyl chloride resin containing a conventional plasticizer, and a vinyl chloride-vinyl acetate copolymer containing a conventional plasticizer. The resin B having one or both of tensile elongation at break of 100% or more is used in an amount of 50% by weight or more, preferably 70 to 95% by weight in the binder, and is secondarily dispersed. An appropriate amount of a polyisocyanate as a curing agent is added to and mixed with this dispersion to prepare a magnetic paint. This polyisocyanate is a low molecular weight isocyanate compound. By adding this low molecular weight isocyanate compound, the friction resistance and adhesion of the coating are improved, but if added excessively, the hardness of the coating becomes high and the emboss treatment is performed. Cracking, peeling, and chipping occur in the magnetic coating in the portion, exposing the base, and significantly impairing the appearance. Therefore, the addition amount is desirably 30% by weight or less, particularly 5 to 30% by weight of the binder component. As these polyisocyanates,
Many commercially available polyisocyanates can be used as curing agents for polyurethane. For example, Coronate L, Coronate HL, Coronate EH, manufactured by Nippon Polyurethane
Coronate 2030, Coronate 3030, Coronate 3041, Coronate 4048, Coronate 4190,
Coronate 4192 and the like. Using this adjusted magnetic paint, a magnetic film is formed on the substrate 21 by a coating method or a transfer method. The thickness of the magnetic film is about 1 to 50 μm for obtaining good electromagnetic conversion characteristics, and preferably 3 to 20 μm for obtaining good resolution.
μ is desirable. The formed magnetic film has a tensile elongation at break of 50% or more.

Here, the magnetic film having a tensile elongation at break of less than 50% can be obtained by embossing desired characters such as characters and numerals after forming the magnetic card 10. The coating is cracked, peeled off, and dropped, exposing the base and significantly impairing the appearance. Further, at a tensile breaking strength of 500 kg / cm ² or less, a tensile breaking elongation of 1
When a resin having no property of not less than 00% is used as the binder resin B, the formed film does not show a tensile elongation at break of 50% or more. Further, when the amount of the magnetic powder in the magnetic film is less than 70% by weight, many of the films show a tensile breaking elongation of 50% or more regardless of the binder, and after forming the magnetic card 10, Even if desired items such as characters and numbers are applied to predetermined positions by embossing, the magnetic coating of the embossed portion does not crack, peel or drop. However, the electromagnetic conversion characteristics of the magnetic coating are inferior to those of conventional magnetic cards. Here, there is a method of increasing the output voltage by increasing the thickness of the magnetic film in order to improve the electromagnetic conversion characteristics, but there is a limit, and conversely, the resolution is reduced.

[0012]

The present invention will now be described in detail with reference to examples and comparative examples. (Example 1) The magnetic paint used in Example 1 is blended and adjusted. 28 parts by weight of Co-coated γ-Fe ₂ O ₃ 2 parts by weight of polyvinyl chloride-vinyl acetate resin <trade name VAGH: manufactured by UCC> 1 part by weight of a phosphate ester dispersant <trade name: Phosphanol RE410: manufactured by Toho Chemical> Toluene 15 parts by weight Methyl ethyl ketone (MEK) 14 parts by weight Subtotal 60 parts by weight The above composition is mixed and dispersed in a ball mill for 24 hours. 60 parts by weight of the mixed dispersion 7 parts by weight of the polyester resin <trade name: Hydrolon 300: manufactured by Toyobo> 17 parts by weight of toluene 16 parts by weight of MEK Total 100 parts by weight Next, the polyester resin and the solvent are mixed into the mixed dispersion with the above composition. And dispersed in a ball mill for 24 hours, and then as a curing agent, coronate L of polyisocyanate is used.
(Manufactured by Nippon Polyurethane Co., Ltd.) was added in an amount of 2 parts by weight, and mixed and stirred so as to be uniform to obtain a magnetic paint. Here, the polyester resin Byron 300 (manufactured by Toyobo) is a resin having a tensile elongation at break of 700% and a tensile strength at break of 50 kg / cm ² . The properties of the magnetic film formed by drying the magnetic paint were measured.
At 6% by weight, the tensile elongation at break was 80%. Using this magnetic paint, a coating method or a transfer method is used to obtain a thickness of 2
A 0μ magnetic coating was formed on a 100μ thick vinyl chloride sheet. Using this, the magnetic sheet 11 of FIG. 3 is formed, and after forming the magnetic card 10, embossing is performed at a predetermined position to determine whether or not the embossed character portion has cracked or peeled off, and to determine the electromagnetic conversion characteristics of the magnetic recording portion. The judgment was made. Table 1 shows the results.
Shown in

Example 2 The magnetic paint used in Example 2 is blended and adjusted. 30 parts by weight of γ-Fe ₂ O _{3 2} parts by weight of polyvinyl butyral resin <trade name: ESREC BL-1: manufactured by Sekisui Chemical> 1 part by weight of zircoaluminate coupling agent <trade name: Manchem APG: manufactured by Kusumoto Kasei> Isopropyl alcohol (IPA) 9 parts by weight Toluene 9 parts by weight MEK 9 parts by weight Subtotal 60 parts by weight The above composition is mixed and dispersed in a ball mill for 24 hours. Mixed dispersion 60 parts by weight Polycarbonate-polyurethane resin 19 parts by weight <Taiferamine MAU9031: manufactured by Dainichi Seika Kogyo Co., Ltd.> Toluene 11 parts by weight MEK 10 parts by weight Total 100 parts by weight After mixing the polycarbonate-polyurethane resin and the solvent with each other and dispersing them in a ball mill for 24 hours, 2 parts by weight of a polyisocyanate Coronate L (manufactured by Nippon Polyurethane) are added as a curing agent, and the mixture is mixed and stirred so as to be uniform. Paint.
Here, polycarbonate-polyurethane resin Diferamine MAU 9031 (manufactured by Dainichi Seika Kogyo) has a tensile elongation at break of 200% and a tensile strength at break of 300 kg / cm.
It is a resin having the characteristics of ² . The properties of the magnetic film formed by drying the magnetic paint were measured. As a result, the amount of the magnetic powder was 78% by weight, and the tensile elongation at break was 52%.
This magnetic paint was treated in the same manner as in Example 1 to determine whether or not the embossed character portion had cracked or peeled off, and to determine the electromagnetic conversion characteristics of the magnetic recording portion. Table 1 shows the results.

Example 3 The composition of the magnetic paint used in Example 3 is adjusted. 29 parts by weight of barium ferrite 2 parts by weight of styrene-maleic acid resin <trade name: Sulfur-la-Hol: manufactured by BASF> 1 part by weight of phosphate ester dispersant <trade name: Phosphanol RE410: manufactured by Toho Chemical> IPA 9 weights Parts Toluene 10 parts by weight MEK 9 parts by weight Subtotal 60 parts by weight The above composition is mixed and dispersed in a ball mill for 24 hours. Mixed dispersion 60 parts by weight Polyurethane resin 26 parts by weight <Trade name Seika Phon U-74: manufactured by Dainichi Seika Kogyo> Toluene 5 parts by weight IPA 4 parts by weight MEK 5 parts by weight Total 100 parts by weight After mixing a polyurethane resin and a solvent with the above composition and dispersing them in a ball mill for 24 hours, coronate L of polyisocyanate is used as a curing agent.
(Manufactured by Nippon Polyurethane Co., Ltd.) was added in an amount of 2 parts by weight, and mixed and stirred so as to be uniform to obtain a magnetic paint. Here, Seikabond U-74 of polyurethane resin (manufactured by Dainichi Seika Kogyo)
Has a tensile breaking elongation of 300% and a tensile breaking strength of 200 k
It is a resin having characteristics of g / cm ² . The properties of the magnetic film formed by drying the magnetic paint were measured. As a result, the amount of the magnetic powder was 77% by weight, and the tensile elongation at break was 58%. The same treatment as in Example 1 was performed on this magnetic paint,
The presence or absence of cracks and peeling of the embossed character portion and the electromagnetic conversion characteristics of the magnetic recording portion were determined. Table 1 shows the results.

Comparative Example 1 The tensile elongation at break of the magnetic film was 5
A comparative example of less than 0% is shown. The blend of the magnetic paint used in Comparative Example 1 is adjusted. 28 parts by weight of Co-coated γ-Fe ₂ O ₃ 2 parts by weight of polyvinyl chloride-vinyl acetate resin <trade name VAGH: manufactured by UCC> 1 part by weight of a phosphate ester dispersant <trade name: Phosphanol RE410: manufactured by Toho Chemical> Toluene 15 parts by weight MEK 14 parts by weight Subtotal 60 parts by weight The above composition is mixed and dispersed by a ball mill for 24 hours. 60 parts by weight of the mixed dispersion 7 parts by weight of the polyester resin <trade name: Hyron 200: manufactured by Toyobo> 17 parts by weight of toluene 16 parts by weight of MEK Total 100 parts by weight Next, the polyester resin and the solvent were mixed into the mixed dispersion with the above composition. And dispersed in a ball mill for 24 hours, and then as a curing agent, coronate L of polyisocyanate is used.
(Manufactured by Nippon Polyurethane Co., Ltd.) was added in an amount of 2 parts by weight, and mixed and stirred so as to be uniform to obtain a magnetic paint. Here, the polyester resin Byron 200 (manufactured by Toyobo) has a tensile elongation at break of 3% and a tensile strength at break of 600 kg / cm ² . The properties of the magnetic film formed by drying the magnetic paint were measured.
At 6% by weight, the tensile elongation at break was 10%. This magnetic paint was treated in the same manner as in Example 1 to determine whether or not the embossed character portion had cracked or peeled off, and to determine the electromagnetic conversion characteristics of the magnetic recording portion. Table 1 shows the results.

Comparative Example 2 Further, a comparative example in which the magnetic coating has a tensile elongation at break of less than 50% is shown. The blend of the magnetic paint used in Comparative Example 2 is adjusted. 29 parts by weight of barium ferrite 2 parts by weight of styrene-maleic acid resin <trade name: Sulfur-la-Hol: manufactured by BASF> 1 part by weight of phosphate ester dispersant <trade name: Phosphanol RE410: manufactured by Toho Chemical> IPA 9 weights Parts Toluene 10 parts by weight MEK 9 parts by weight Subtotal 60 parts by weight The above composition is mixed and dispersed in a ball mill for 24 hours. 60 parts by weight of the mixed dispersion 16 parts by weight of the polyurethane resin <trade name Seika Phon U-74: manufactured by Dainichi Seika Kogyo> 9 parts by weight of toluene 7 parts by weight of IPA 8 parts by weight of MEK 100 parts by weight in total After mixing a polyurethane resin of the same resin B and a solvent as in Example 3 with the above composition and dispersing them in a ball mill for 24 hours, 2 parts by weight of a polyisocyanate Coronate L (manufactured by Nippon Polyurethane) was added as a curing agent. The mixture was mixed and stirred so as to be uniform to obtain a magnetic paint. When the characteristics of the magnetic film formed by drying the magnetic paint were measured, the amount of the magnetic powder was 71% by weight and the tensile elongation at break was 42%. This magnetic paint is treated in the same manner as in Example 1 to determine whether the embossed character portion is cracked or peeled off.
The electromagnetic conversion characteristics of the magnetic recording section were determined. Table 1 shows the results.

Comparative Example 3 Next, a comparative example in which the amount of magnetic powder in the magnetic coating is less than 70% by weight will be described. The magnetic paint used in Comparative Example 3 is blended and adjusted. 24 parts by weight of Co-coated γ-Fe ₂ O ₃ 2 parts by weight of polyvinyl chloride-vinyl acetate resin <trade name VAGH: manufactured by UCC> 1 part by weight of a phosphate ester dispersant <trade name: Phosphanol RE410: manufactured by Toho Chemical> Toluene 17 parts by weight MEK 16 parts by weight Subtotal 60 parts by weight The above composition is mixed and dispersed in a ball mill for 24 hours. 60 parts by weight of the mixed dispersion 11 parts by weight of a polyester resin <trade name: Hyron 300: manufactured by Toyobo> 14 parts by weight of toluene 15 parts by weight of MEK 100 parts by weight in total A polyester resin of the same resin B and a solvent were mixed and dispersed in a ball mill for 24 hours. Then, as a curing agent, coronate L (manufactured by Nippon Polyurethane) of polyisocyanate was added.
A part by weight was added and mixed and stirred so as to be uniform to obtain a magnetic paint. When the characteristics of the magnetic film formed by drying the magnetic paint were measured, the amount of the magnetic powder was 64% by weight and the tensile elongation at break was 95%. This magnetic paint was treated in the same manner as in Example 1, and the presence or absence of cracks and peeling of the embossed character portion and the electromagnetic conversion characteristics of the magnetic recording portion were determined according to the following measurement methods. Table 1 shows the results.

<< Measurement method of characteristic value >> [Electromagnetic conversion characteristics]-Measurement method of coercive force H (Elsted II), squareness ratio Rs (-), residual magnetic flux (Max / cm) Vibrating sample magnetometer (RIKEN ELECTRONICS CO., LTD.) )
BHV-30) Maximum applicable magnetic field: 10 (kilo-sted) Specimen size: 10 mm × 10 mm square Magnetization direction: easy axis Pass / fail of characteristic values: squareness ratio: 0.7 or more passed Residual magnetic flux: 1.2 (Max / cm) or more ・ Resolution (%), output voltage (mV) measurement method Magnetic card reproduction output measuring device (manufactured by Apolomec Co., Ltd.) Test piece size: JIS-II type card Recording method: F2F modulation method Recording data 0 Card running speed: 190 (mm / sec) Head gap: recording 50 (μm), reproduction 20 (μm) Recording density: 210 (BPI), 420 (BPI) Recording current: 90% of saturation output voltage Write current (mA) Output voltage: Average reproduction output voltage (mV) when recording at a recording density of 210 BPI Resolution: {Average reproduction output voltage (mV) when recording at a recording density of 420 BPI} / ｛When recording at a recording density of 210 BPI Average playback output voltage (mV)｝ × 100 (%) Pass / Fail: Resolution: 90% or more is （(good), the following is × (bad) Output voltage: 500 mV or more is ○ (good), the following is × (bad)

[Coating properties] Measurement method of tensile elongation at break (%) According to JIS K5400 (8.8 tensile strength and elongation) Dry coating thickness: 20 (μm) Peeling speed: 50 (mm / min) Measuring method of magnetic powder content (%) According to JIS K5407 (8. Ash content) Determine magnetic powder content by ash content in dry film • Measuring method of emboss resistance (cracking) Emboss treatment: EMBOSSER NE-1000 (( Direct observation of the embossed part with an optical microscope. Classification into the following six stages (JIS K5500) No cracks ... 6 Hair cracks ... 5 Shallow cracks ... 4 Crazing ... 3 Deep cracks ... 2 Alligator cracks ... 1 Quality of properties: 6-4: ○ (good), 3-1: × (poor) ・ Emboss resistance (peeling) Measurement method of embossing: EMBOSSER NE-1000 (manufactured by Nipponjiken Co., Ltd.) JIS Z1522 Attach the adhesive tape to the embossed part and rub it with the eraser specified in JIS S6050. Attach the tape 1-2 minutes after applying the tape, hold one end of the tape and press the embossed surface. Maintain a right angle to and peel off instantaneously. Evaluate by visually observing the state of the embossed part. Good or bad: Evaluated for both the coating method and the transfer method magnetic card. No peeling: ○ (good), peeling : × (defective) ・ Comprehensive evaluation: Good in both electromagnetic conversion characteristics and film characteristics ○ (good) × (defective) if any of them is defective

[0020]

[0021]

According to the present invention, it is possible to produce a magnetic card of low cost and of stable quality in the same manner as the conventionally proposed magnetic card.
Cracking, peeling and chipping of the magnetic coating in the embossed part are eliminated, and the embossed part is also beautiful,
In addition, a magnetic card having good electromagnetic conversion characteristics can be created.

[Brief description of the drawings]

FIG. 1 is a plan view and a TT ′ cross-sectional view showing a configuration of a conventional magnetic card;

FIG. 2 is a plan view and a TT ′ cross-sectional view showing a configuration of a conventional magnetic card;

FIG. 3 is a plan view of a magnetic card according to an embodiment of the present invention and T.
-T 'sectional view,

FIG. 4 is a cross-sectional view for explaining a method of manufacturing the magnetic card of the present invention.

FIG. 5 is a sectional view for explaining a method of manufacturing the magnetic card of the present invention;

FIG. 6 is a sectional view for explaining a method of manufacturing the magnetic card of the present invention.

FIG. 7 is a cross-sectional view for explaining a method of manufacturing the magnetic card of the present invention.

FIG. 8 is a sectional view showing another embodiment of the magnetic card of the present invention;

FIG. 9 is a sectional view showing another embodiment of the magnetic card of the present invention;

10 is a sectional view for explaining a method of manufacturing the magnetic card of the present invention shown in FIG.

FIG. 11 is a sectional view showing another embodiment of the magnetic card of the present invention.

[Explanation of symbols]

 10 Magnetic card 11 Magnetic sheet 21,22,23 Base 25 Support 31 ..... magnetic recording layer 32 ..... covering layer 33,34 ..... protective layer 35. ..... Adhesive layer 41,42 .... Printed characters, designs, etc. 43,44 .... Characters, numbers, etc. by emboss processing

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Katsufumi Awaya Ryoke 4-3-25, Ryoke, Kawaguchi City, Saitama Prefecture Examiner, Hiroshi Kitaoka, Dainichi Seika Kogyo Co., Ltd. (56) References JP-A 5-139077 (JP, A (58) Fields surveyed (Int. Cl. ⁶ , DB name) G11B 5/702 B42D 15/10 501 G11B 5/80

Claims (7)

(57) [Claims] 1. A magnetic card having a magnetic recording layer provided on at least one entire surface of a substrate made of a thermoplastic resin and applying desired characters such as characters and numerals to a predetermined area by embossing. A magnetic card comprising: a magnetic recording layer containing at least 70% by weight of a magnetic powder of at least 300 Oersted and having a tensile elongation at break of at least 50%. 2. The magnetic card according to claim 1, wherein the main components of the magnetic recording layer comprise a magnetic powder, a binder and a polyisocyanate. 3. A resin having at least one resin A selected from the group consisting of a vinyl chloride-vinyl acetate copolymer, a polyvinyl butyral resin, a styrene-maleic acid resin and a rosin-modified maleic resin, and a tensile strength at break. 500k
3. The magnetic card according to claim 2, comprising a resin B having a characteristic of not more than g / cm ² and / or a tensile elongation at break of 100% or more. 4. A resin B comprising a polyester resin, a polyurethane resin, an ethylene-vinyl acetate copolymer, a polyvinyl chloride resin containing a conventional plasticizer and a vinyl chloride-vinyl acetate copolymer containing a conventional plasticizer. 4. The magnetic card according to claim 3, wherein the magnetic card is selected from a group. 5. The method according to claim 1, wherein a concealing layer and a design layer are sequentially formed on the magnetic recording layer.
The magnetic card according to 2, 3, or 4. 6. The method according to claim 1, wherein the magnetic recording layer is a coating layer or a transfer layer.
Magnetic card as described. 7. An electronic component such as an IC is embedded in the card.
Or a magnetic card according to 6.