JPS6294396A - Information record medium - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an information recording medium in which both image information such as characters or figures and digital signals for data processing can be recorded in a superimposed manner on one surface of a substrate.

2. Description of the Related Art Magnetic cards, in which a magnetic recording layer is provided on the surface of a non-magnetic substrate such as plastic or paper, are widely used for applications such as magnetic commuter passes, magnetic coupon tickets, and credit cards.

In these magnetic cards, characters, codes, figures, etc. are printed on the blank space on the surface of the substrate other than the magnetic recording layer or on the back surface. However, when the magnetic recording layer is expanded, the area on which characters, codes, figures, etc. can be printed is reduced. In the opposite case, there is a problem that the magnetically recordable area decreases.

In order to solve such problems, conventionally, as shown in the partially enlarged view of FIG. , figures, etc. are printed using normal printing methods such as offset, gravure, or letterpress, or are sometimes printed directly on the magnetic recording layer without providing the white layer 5), and then a protective varnish layer 6 is applied thereon.
A magnetic card equipped with a magnetic card has been proposed and is in use. In FIG. 3, reference number 7 indicates printing ink applied by printing.

Problems to be Solved by the Invention However, manufacturing magnetic cards by the method described above not only requires high costs due to plate making, printing, etc.
It is not possible to adequately respond to requests for different printing contents for each card.

An object of the present invention is to provide an information recording medium that can solve the conventional problems as described above.

Means and Action for Solving the Problems The information recording medium according to the present invention is characterized in that a low-resistance magnetic recording layer is provided on the surface of a non-magnetic substrate, and a dielectric layer is provided on top of the low-resistance magnetic recording layer to form an electrostatic recording layer. It is possible to record image information such as characters, codes, and figures on the dielectric layer using electrostatic recording, and to magnetically record information necessary for data processing on the magnetic recording layer. . That is, according to the information recording medium of the present invention, image information and data processing information can be recorded in an overlapping manner on one surface of the substrate.

Embodiments Next, the present invention will be described in more detail with reference to embodiments of the present invention based on FIGS. 1 and 2 of the accompanying drawings.

FIG. 1 is a sectional view of an information recording medium showing an embodiment of the present invention.

(Nominally 188 μm thick white polyethylene phthalate) (P
ET) 60 parts of acicular T-Pe203 magnetic material (MR-r manufactured by Titan Industries) and 10 parts of carbon black (Conductex 5C manufactured by Columbia Chemical) were added to one side of the substrate 1 of the film. Sekisui Chemical's S-LEC A) Magnetic paint uniformly dispersed in a lacquer consisting of 30 parts of a binder and an organic solvent has a thickness of approximately 10% after drying.
The magnetic coating layer 2 is coated uniformly on μm and dried after magnetic field orientation.
Form A.

Next, on this magnetic coating layer 2A, by vacuum evaporation method,
Co metal is obliquely deposited to form a ferromagnetic metal thin film layer 2B, and the magnetic coating layer 2A and the ferromagnetic metal thin film layer 2B form a magnetic recording layer 2'.

Further, on the ferromagnetic metal thin film layer 2B, a dielectric layer paint consisting of 70 parts of vinyl chloride resin (PVC), 230 parts of 5i0, and an organic solvent is uniformly applied to a dry thickness of about 2 μm and dried to create a dielectric layer. After forming layer 3, it is punched out to a desired size to create a card-shaped information recording medium.

This information recording medium has a cotton density of 6/mm and a needle diameter of 0 and 1.
Image information was electrostatically recorded using a multi-stylus (multi-needle) type electrostatic recording head of 1.5 mm in diameter at a potential of -500 to -800 V and an application time of 1 dot of 20 μsec, as shown schematically in FIG. After developing with electrostatic toner 4, an image is formed by heat fixing with an infrared flash lamp. next,
Magnetic head (gap length 30 μm) rack width 2111
111. 42 digital signals with core material Sendust)
Saturated recording was performed at a recording density of 0FCI. As a result, the recorded image information was faithfully recorded, even in small characters in 1-bit units, and the digital information recorded on the magnetic recording layer had output fluctuations within 5%, which is sufficient for practical use.

The magnetic recording layer 2' has the feature that it plays the role of a conductive layer of a normal electrostatic recording medium during electrostatic recording, and plays the role of a normal magnetic recording layer during digital signal recording and reproduction. have. In addition, in this embodiment, the magnetic recording layer 2' is made of two layers, the magnetic coating film 2A and the ferromagnetic metal thin film 2B, because this is more effective in achieving high resolution for both electrostatic recording and magnetic recording. It is. However, the present invention is not limited thereto, and the magnetic recording layer may be composed of a single magnetic layer with low resistance.

In the present invention, the magnetic materials constituting the magnetic recording layer include r-FeJa, Fe3O4, Co-coated γ-
Ferromagnetic metal oxide powder such as Pe20s, Ban I 6FB203, ferromagnetic metal powder such as Fe, Fe-Co, Co-Ni ferromagnetic plating film, perpendicular magnetization film such as Co-Cr, etc. can be used as a single layer or in multiple layers. It can be used.

The magnetic recording layer has a specific resistance value of 103 Ω in order to function as a low resistance layer during electrostatic recording.
- It is preferable that it is below cm.

In the present invention, materials constituting the dielectric layer include polymeric resins such as acrylic esters, methacrylic esters, vinyl chloride, vinyl acetate, vinylidene chloride, and polyesters, as well as titanium dioxide, colloidal silica, talc, and clay. Inorganic pigments can be used.

In the above embodiment, an example was explained in which PVC resin and SiO2 pigment were used as the constituent materials of the dielectric layer 3. However, a polyester resin was used instead of the PVC resin, and a toner containing a sublimable dye was used as the electrostatic toner 4. By recording the image using the same method, it is possible to provide the feature that the sublimable dye permeates into the dielectric layer 3 and is fixed during thermal fixation. In addition, multicolor printing is also possible using color toners.

In the above embodiment, an example was described in which the recording layer (magnetic recording layer 2' and dielectric layer 3) was formed on one side of the base 1.
Of course, recording layers can be formed on both sides of the substrate 1.

Further, although this embodiment was applied to a card-shaped medium, the present invention is not limited to this, and can be applied to sheet-shaped, tape-shaped, disk-shaped, and drum-shaped information recording media.
It is equally effective when applied.

Effects of the Invention The present invention has a configuration in which a low-resistance magnetic recording layer is provided on the surface of a non-magnetic substrate such as plastic or paper, and a dielectric layer is further provided on top of the magnetic recording layer. , codes, graphics, etc. can be recorded in an overlapping manner, increasing the amount of information that can be recorded. At the same time, it is possible to cope with recording contents that vary from sheet to sheet, thereby reducing costs.

Furthermore, since the information recording medium of the present invention does not use the conventional printing method using a commercially available printing machine when forming an image, it is more effective against fraud such as forgery and falsification.

[Brief explanation of drawings]

1 is a cross-sectional view of an information recording medium as an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a state in which electrostatic toner is applied to the information recording medium of FIG. 1 by electrostatic recording, and FIG. FIG. 3 is a partially enlarged sectional view showing an example of a conventional magnetic card. 1...Base, 2'...Magnetic recording layer, 2
A: Magnetic coating film, 2B: Ferromagnetic metal thin film, 3: Dielectric layer, 4: Electrostatic toner. Figure 1 Figure 2 Figure 3

Claims (5)

[Claims] (1) A low-resistance magnetic recording layer is provided on the surface of a non-magnetic substrate,
An information recording medium characterized in that a dielectric layer is provided thereon to form an electrostatic recording layer. (2) The specific resistance of the magnetic recording layer is 10^3Ω・cm
An information recording medium according to claim (1) below. (3) The magnetic recording layer consists of two layers: a magnetic coating layer mainly composed of magnetic powder and a polymeric resin binder, and a ferromagnetic metal thin film.
The information recording medium according to claim (1) or (2), which has a layered structure. (4) The dielectric layer is a coating layer mainly composed of a white insulating inorganic pigment and an insulating polymeric resin binder. ) Information recording media described in section 2. (5) The information recording medium according to claim 4, wherein the insulating inorganic pigment is a SiO_2 pigment, and the polymer resin binder is a polyester resin.