JPH0524384A - Change card - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a change card that allows you to easily visually check the information content of a card just by looking at it. A change card having an information storage section and a magnetic display section on a base body, wherein the information storage section is composed of a magnetic tape or an IC memory, and the magnetic display section is provided on a substrate and directly or on the substrate. A recording layer containing a microcapsule applied via an intermediate layer, wherein the microcapsule contains a liquid and a magnetic powder floating in the liquid and sensitive to a magnetic field. Therefore, based on the information stored in the information storage portion, it is possible to record and erase the visible information on the recording layer of the magnetic display portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a change card capable of accumulatively recording the change amount, and more particularly to a change card provided with a magnetic display portion of visible information.

[0002]

2. Description of the Related Art In recent years, a magnetic recording material for recording information as magnetic information is capable of instantaneous recording / reproduction / erasing and is extremely stable in recording state. The application to magnetic cards such as change cards that can be recorded has been popular. Such a magnetic card can be read by an information reading device by displaying the recorded content of the information on the display of the device.

[0003]

However, in the conventional change card, as described above, the information reading device is always required in order to visually check the recorded contents of the information. Therefore, even if there is a user's desire to visually check how much amount of change has been accumulated by looking at the card directly at any time, such a request is made. There was no change card to satisfy. There is also a demand for a card that can be clearly displayed and can be easily visually confirmed.

In view of the above circumstances, the present invention was devised, and the object of the present invention is to look at the information content of the card easily by looking at the card directly at any time. It is to provide a change card that can be surely confirmed.

[0005]

In order to solve the above-mentioned problems, the present invention is a change card having an information storage section and a magnetic display section on a base, wherein the information storage section is a magnetic tape or an IC memory. The magnetic display unit has a substrate and a recording layer containing microcapsules coated directly or via an intermediate layer on the substrate, and the liquid and the liquid are contained in the microcapsules. And magnetic powder that is sensitive to a magnetic field are contained in the magnetic recording medium, so that visible information can be recorded and erased on the recording layer of the magnetic display unit based on the information stored in the information storage unit. I chose

[0006]

When the perpendicular magnetic field φV is applied to the card of the present invention as shown in FIG.
2a are vertically aligned, so that the incident light Li from the outside is aligned to the card surface so that the incident light from the outside reaches the surface of the substrate 11 where it is reflected and reflected. Light Lo is generated. In this state, the color of the substrate 11 is visually recognized as reflected light.

On the other hand, as shown in FIG. 6, when a parallel magnetic field φP is applied to the card, the magnetic powder 22a in the microcapsule 22 is horizontally oriented, and incident light Li from the outside is reflected by the magnetic powder 22a, It becomes the reflected light Lo, and in this state, the color of the reflected light from the magnetic powder 22a is visually observed.

Therefore, if the state of FIG. 6 is set to the erased state,
A bright metallic color is visible from the outside. On the other hand, if the state of FIG. 5 is partially written by the vertical magnetic field φV, this portion is visually observed, for example, in black, and can be easily read from the outside.

Of course, it is possible to display by inverting the recording state and the erasing state.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The change card of the present invention will be described in detail below with reference to FIGS. The change card is a card that can cumulatively record the amount of change generated after a shopping card, and has a concept opposite to a so-called prepaid card.

FIG. 1 is a perspective view showing an embodiment of a change card 1. The change card 1 of the present invention includes a base body 2 serving as a base of a medium, a magnetic display unit 10 incorporated on one plane of the base body 2, and an information storage unit 4 incorporated on one plane of the base body 2. is doing.

The substrate 2 is, for example, a plate-like support, which is usually polypropylene, polyethylene, polyethylene terephthalate, vinyl chloride, AB.
It is formed from various plastics such as S, PBT, POM (polyacetal), various metals, various cardboards, and other materials.

The size of the base body 2 is not particularly limited, but is usually a size corresponding to a card that can be easily carried. The thickness is about 0.5 to 2.0 mm.

The magnetic display portion 10 incorporated in such a base body 2 has a laminated structure as shown in FIG. That is, the magnetic display unit 10 includes a substrate 11, a recording layer 20 provided on the substrate 11, and a protective layer 14 provided on the substrate 11 with an anchor layer 13 interposed therebetween.

The material of the substrate 11 is not particularly limited as long as it serves as a sheet-shaped support of various plastics, papers, metals, etc., but the substrate 11 itself is colored black or the surface of the substrate 11 is black. Colored ones are particularly preferable for making the display contrast clear. As a coloring means, for example, barium sulfate, microsilica, carbon black, or another pigment may be kneaded into various plastic raw materials and then molded into a sheet. Such a substrate 1
The thickness of 1 is usually about 50 to 200 μm.

The recording layer 20 provided on the substrate 11 has a plurality of microcapsules 22 and a binder 2.
4 is provided. Liquid 22b is contained in the microcapsule 22.
And the magnetic powder 22a are contained therein, and the magnetic powder 22a is in a state of being suspended in the vehicle.

The vehicle preferably contains a polar liquid, a hydrophobic liquid, and a thermoplastic resin. Examples of polar liquids include alcohols, ketones, esters, carboxylic acids, and amino compounds having polar groups such as a hydroxy group, a carbonyl group, a carboxy group, and an amino group. More specifically, esters such as aromatic acid esters, fatty acid esters, alcohol esters, and oxyacid esters are common, and dibutyl phthalate, octidiphenyl phosphate, dioctyl sebacate, triacetone, castor oil, etc. It is mentioned as a suitable example.

As the hydrophobic liquid, a low-volatile aliphatic compound,
Aromatic hydrocarbons and mixtures thereof which are commonly used in microcapsules for pressure-sensitive copying paper are preferred.
Any thermoplastic resin can be used as long as it can be stably dissolved in the mixed liquid of the polar liquid and the hydrophobic liquid. Among them, those which have good transparency during dissolution and which do not gel by an electric field, a magnetic field, light, heat, temperature, etc. and which do not adversely affect the microcapsule wall forming reaction are selected. . Preferable examples include polyvinyl butyral, polyvinyl acetate, alicyclic saturated hydrocarbon resin, polymethacrylic acid ester, acetyl cellulose, ethyl cellulose and the like.

The viscosity of the vehicle containing such components at room temperature is about 20 to 5000 cP. The viscosity mainly varies depending on the content of the thermoplastic resin, and the content of the thermoplastic resin is about 2 to 50 wt%. Also,
The content rate of the polar fluid is appropriately set in consideration of compatibility with the thermoplastic resin, stability of the magnetic powder, and the like.

As the magnetic powder, iron, nickel, iron-nickel, stainless steel such as iron-nickel-chromium, aluminum-cobalt alloy, samarium-cobalt alloy, etc. are used. The shape of the magnetic powder is preferably a so-called flake shape, and it is preferable that the thickness is as thin as possible and the ratio of the thickness to the particle size is large. The particle size is
It is set to about 3 to 15 μm. If the particle size becomes large, it will not be well housed in the capsule due to the relationship with the particle size of the capsule, and the reaction to external magnetism will be delayed. On the other hand, when the particle size is small, when magnetized, the difference in light reflectance between the horizontal direction and the vertical direction becomes small, and the contrast during recording deteriorates.

The coercive force of such magnetic powder may be appropriately selected depending on the use of the medium used, and is usually 50.
A material of 0 Oe (Oersted) or more is used. Further, from the viewpoint of improving the dispersibility of the magnetic powder in the vehicle and preventing the magnetic powder from aggregating with each other, the surface of the magnetic powder may be previously coated with various known organic materials. Also,
Aluminum or silver may be vapor-deposited on the surface of the magnetic powder in order to increase the reflectance of the magnetic powder.

Further, it is preferable to contain a dye or a pigment in the microcapsules in order to improve the contrast. Such microcapsules are disclosed, for example, in US Pat. No. 2,800,458 and British Patent 1142.
It is manufactured by various known methods disclosed in US Pat. No. 556, US Pat. No. 4,001,140 and the like. The volume average particle diameter of the microcapsules is preferably 10 to 100 μm. If this value is too small, the total amount of magnetic powder contained in the capsule will be small, and the contrast during recording will not be sufficient. On the contrary, if this value becomes too large, the recording layer surface becomes uneven, and the recorded image becomes non-uniform.

The binder used for coating such microcapsules is not particularly limited as long as it does not damage the walls of the microcapsules and adheres well to the surface of the substrate 11. More preferable specific examples include hydroxyethyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, polyvinylpyrrolidone and the like.

The thickness of the recording layer 20 containing such microcapsules is usually 50 to 200 μm.
The protective layer 14 is provided on the recording layer 20 via the anchor layer 13.

As the anchor layer 13, polyester,
A material such as acrylic is used. The anchor layer 13 has a thickness of about 5 to 20 μm. Protective layer 14
As the material, materials such as polyester and polycarbonate are used. The thickness of the protective layer 14 is 200 to
It is set to about 100 μm.

The magnetic display portion 10 formed as described above.
It is preferable that the magnetic layer 30 is embedded under the magnetic layer 30 as shown in FIG. This magnetic layer is made of iron, nickel, stainless steel such as iron / nickel or iron / nickel / chrome, aluminum / cobalt alloy, samarium / cobalt alloy, or the like. Its size is similar to that of the magnetic display unit 10, and its thickness is 5 to 2
It is about 00 μm.

In this embodiment, a magnetic stripe 4 is fixed along the longitudinal direction of the card as an information storage section incorporated in the lower plane of the base body 2. Based on the recorded information written on the magnetic stripe 4, visible information can be recorded and erased on the recording layer 20 of the magnetic display section 10. Instead of the magnetic stripe 4, it is also preferable to incorporate an IC memory in the base 2 as an information storage unit. In this case, the storage capacity is significantly increased. It should be noted that reading of information stored in the information storage unit and writing of visible information to the magnetic display unit are performed by a device (not shown).

Next, the present invention will be described in more detail with reference to specific experimental examples. <Experimental Example 1> Preparation of dispersion liquid of flaky magnetic powder 18.0 g of magnetic flaky powder-Fe / Ni alloy, Fe: Ni = 64: 36-Saturation magnetization θs 129-Residual magnetic flux density θr 65-Coercive force Hc 540 ・ Average particle size 9.2 μm ・ Specific surface area 0.096 m ² / g ・ Specific gravity 8.1 Ethyl cellulose (trade name; N-7, manufactured by Hercules, USA) 7.5 g Dimethyl phthalate 36.5 g Phenyl xylyl Ethane (trade name; Nisseki Hysol SAS) 36.5 g While stirring this mixed solution, the mixture was heated to 90 ° C. to dissolve ethyl cellulose and a coloring dye.

Preparation of stock solution for encapsulation Gelatin 1.5 g Arabic gum 15 g Pure water 170 g was dissolved at 50 ° C. to prepare a stock solution for encapsulation.

Microcapsules were prepared using the stock solution for encapsulation and the dispersion liquid of the above magnetic powder. Preparation of microcapsules 80 g of the above-mentioned stock solution for encapsulation had a 2% NaOH aqueous solution.
Dispersion of the above magnetic powder 60 g while adding 7 g and stirring
Was gradually added and then emulsified until the particle size became 50 μm.

Next, 250 g of pure water at about 50 ° C. was added, and the pH of the system was adjusted with a 5% aqueous acetic acid solution while keeping the mixed system with this emulsion at 50 ° C. Then slowly cool 5
Add 4.2 g of 0% glutaraldehyde and continue to add 3
The stirring was continued for a while to harden the capsule wall to obtain a magnetic capsule slurry.

Then, the magnetic capsule slurry was passed through a mesh filter to make the particle size uniform (250 mesh filter remaining) to obtain a recording layer forming sample. Preparation of Card Sample First, as shown in FIG. 4, in a concave portion of a PVC resin substrate of 54 × 85.6 and 0.76 mm in thickness, which was previously housed in an IC memory and had a concave portion formed on the surface thereof. A magnetic sample 10 having a layered structure was laminated to produce a card sample (Sample 1).

A specific method for laminating the magnetic display portion 10 is as follows. A PET film is coated with a primer (anchor agent) in a predetermined amount by a coating machine, dried and wound.

Next, a predetermined amount of microcapsule ink is coated on the primer surface of this coated PET film with a coating machine and wound in the same manner. Sumi (black) ink is further coated on the primer and microcapsule coated one.

Similarly, the adhesive is finally coated to complete the lamination. Then, a magnetic layer 30 made of iron having a thickness of 16.4 × 75.6 and a thickness of 0.4 mm was buried under the magnetic display portion 10 of the sample 1 to prepare a sample 2.

Information writing (recording) and erasing tests were performed on these two samples. That is, by using a device provided with an information reading unit and a writing unit, predetermined information recorded in the IC memory is read,
After that, information was written on the display part of the sample. For writing, if a vertical magnetic field (650 Oe) is applied to a predetermined position,
The magnetic powder in the capsule of the recording layer was vertically oriented and turned black. When the difference in lightness between the bright background and the blackening was measured with a color difference meter (manufactured by Suga Test Instruments Co., Ltd.), it was 14
There was a difference of 20 points between Sample 2 and Sample 2, and it was confirmed that blackened recording was possible in a bright background, and both were confirmed to be put to practical use. In particular, it was also confirmed that the latter one has a magnetic layer, so that the gradation of recorded display becomes clearer.

[0037]

The change card of the present invention is a card having an information storage section and a magnetic display section on a base, wherein the information storage section comprises a magnetic tape or an IC memory, and the magnetic display section comprises: It has a substrate and a recording layer containing microcapsules coated directly or via an intermediate layer on the substrate, and in the microcapsules, a liquid and a liquid floating in the liquid and exposed to a magnetic field. It contains a magnetic powder that is sensitive, and makes it possible to record and erase visible information in the recording layer of the magnetic display section based on the information stored in the information storage section, so that at any time Even if there is, there is an effect that the information content of the card can be visually and easily and surely confirmed just by directly looking at the medium.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a change card.

FIG. 2 is a front view of the change card 1.

3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a cross-sectional view showing a layer structure of a magnetic display unit.

FIG. 5 is a cross-sectional view showing the behavior of magnetic powder in a capsule when a vertical magnetic field is applied to the surface of a change card.

FIG. 6 is a cross-sectional view showing the behavior of the magnetic powder in the capsule when a horizontal magnetic field is applied to the surface of the change card.

[Explanation of symbols]

1 ... Change card 4 ... Information storage 10 ... Magnetic display 20 ... Recording layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location G11B 5/80 7303-5D // G07F 7/08 (72) Inventor Yoshiaki Hida Enoki Shinjuku-ku, Tokyo 7th Town Dai Nippon Printing Co., Ltd. (72) Inventor Masao Gogami 7 Enokicho Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd.

Claims (3)

[Claims] 1. A change card having an information storage section and a magnetic display section on a base, wherein the information storage section is a magnetic tape or an IC memory, and the magnetic display section has a substrate and a substrate thereon. A recording layer containing microcapsules applied directly or via an intermediate layer, in which liquid and magnetic powder floating in the liquid and sensitive to a magnetic field are contained. A change card, which is contained and is capable of recording and erasing visible information on the recording layer of the magnetic display section based on the information stored in the information storage section. 2. The change card according to claim 1, wherein a magnetic material layer is embedded below the recording layer. 3. The magnetic layer is made of flakes of fine particles of iron, nickel, stainless steel such as iron-nickel or iron-nickel-chrome, aluminum-cobalt alloy, samarium-cobalt alloy, or the like. The change card according to claim 2, wherein: