JPH04142995A - Discharge breakdown recording medium - Google Patents

Abstract

PURPOSE:To enhance printing quality and to freely take a hue by partially constituting a protective layer of a conductive region and a non-conductive region. CONSTITUTION:Black ink is applied to a PET support 5 with 188mum thickness by a roll coater to form a colored layer 6 with 5mum thickness. Further, a discharge recording layer 4 is laminated to the colored layer 6 by accumulating aluminum in 50nm thickness by vacuum vapor deposition. Dots each composed of a 0.1mm square are printed on the layer 4 at first as a protective layer 3 in density of 5 dots/mm in 3mum thickness by gravure printing using an acrylic resin having 20% of a silver powder dispersed to obtain a conductive region 2. The area ratio of the dots at this time is 25%. White ink is further applied to the layer 3 using a roll coater to be sufficiently leveled and dried to form a non-conductive region 1 in 2mum thickness to obtain the protective layer 3. The conductive region 2 of a discharge breakdown recording medium is thickner than the non-conductive region 1 thereof and the non-conductive region 1 thereof and the return electrode 8 of a discharge breakdown recording apparatus abuts against the conductive region 2 selectively and efficiently.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to transportation tickets, commuter passes, ticket purchasing cards, telecommunication cards, road passes and cards, and product sales cards for transportation such as railways and lotuses. This invention relates to electrical discharge destruction recording media used for cards, gift certificates, etc.

[Conventional technology]

At present, recording media using magnetic recording methods are used in a wide range of fields such as disks, tapes, cards, cards, and strips on sheets. In particular, magnetic recording media, which are made by coating a plastic sheet with a magnetic material such as iron oxide or barium ferrite and baingu resin, are highly portable, and are used as tickets and tickets on transportation such as trains, as mentioned above. It is widely used for tickets, commuter passes, and distribution media where interest is paid in advance, generally known as prepaid cards. However, since this magnetic recording method records and reproduces information magnetically, it has the disadvantage that the information cannot be visually recognized by the user.

In order to solve this problem, a method has been used in which the usage fee, remaining amount, etc. are printed in advance on the recording medium, and the information is displayed by punching holes therein depending on the usage situation. but,
In this case, the information that can be displayed is limited, and it is extremely difficult to display accurate values such as amounts.

On the other hand, as methods for visually displaying balances, etc., printing methods using thermal transfer, thermal recording methods that develop color on leuco bodies, and methods that print by thermally changing metal vapor deposition films such as tin have been proposed and put into practical use. There is.

However, even these printing methods have problems such as poor maintenance of the recording device, poor weather resistance, and poor heat resistance.

There is a discharge breakdown recording method as a method to solve this problem. This recording method and its recording medium have high heat sensitivity;
Although it has an excellent feature of high printing speed, it needs to have a protective layer to give the recording medium sufficient durability. In this case, it is necessary to impart electrical conductivity to the protective layer in order to achieve electrical conduction at the return electrode. If an attempt is made to make the protective layer electrically conductive, it is difficult to obtain a transparent film, and the color tone of the recording medium cannot be freely set. Furthermore, recording sensitivity and print quality are also restricted by this.

[Problem to be solved by the invention]

The present invention has been made in view of the problems of the prior art as described above, and provides a recording medium with higher print quality in discharge destruction recording media, as well as a recording medium with a free color tone. Its main purpose is to

[Means to solve the problem]

In order to achieve the above object, the discharge rupture recording medium of the present invention is a discharge rupture recording medium in which at least a discharge rupture layer and a protective layer are provided on a support, in which the protective layer partially forms a conductive region. By being composed of a non-conductive region, the printing quality is improved and the color tone can be freely selected.

[Details of the invention] The explanation will be explained in detail using figures.

FIGS. 1 and 2 are cross-sectional explanatory views of the discharge destruction recording medium according to the present invention. These discharge destruction recording media have a discharge recording layer (4) laminated on a support (5) such as paper or plastic, and a protective layer consisting of a non-conductive area (1) and a conductive area (2). (3) is laminated. Now, the support (
Even if the support (5) and the discharge recording layer (4) are colored,
) may have a colored layer exposed by discharge breakdown. Further, a magnetic recording layer may be provided between the support (5) and the discharge recording layer (4) or a colored layer exposed by discharge breakdown. The discharge recording layer (4) is made of a material that can be destroyed by discharge, and is preferably made of metal such as aluminum. Here, the metal discharge recording layer made of aluminum or the like can be provided by a vacuum evaporation method, a sputtering method, an ion blasting method, etc., and the layer thickness is preferably about 10 nm to 1100 nm. The conductive region (2) of the protective layer (3)
) can be provided by offset printing, gravure printing, screen printing, etc., and preferably has a thickness of about 1 to 5 μm.

The material used for the conductive region (2) only needs to have sufficient conductivity, and conductive fillers such as metal powders such as silver and aluminum are added to resins such as acrylic, urethane, epoxy, polystyrene, and polyester. contaminated materials, conductive organic polymers such as polyacetylene, conductive base
Stamp, conductive ink, etc. can be used.

The non-conductive region (1) of the protective layer (3) is the conductive region (2)
After formation, it can be provided using a gravure coater, a spin coater, a roll coater, etc., and the thickness is preferably about 1 to 5 μm. The material used for the non-conductive area (2) does not need to be conductive, and may include resins such as acrylic, urethane, epoxy, polystyrene, or polyester, or resins containing pigments, etc., or various printing inks. etc., you can select anything. Here, these conductive regions (2
) and the material used for the non-conductive region (1), if necessary, a lubricant or the like may be added.

Further, the order of formation of the conductive region (2) and the non-conductive region (1) may be reversed.

FIG. 3 is an explanatory view of the appearance of the discharge destruction recording medium of the present invention. (1) is a non-conductive region of the protective layer, and (2) is a conductive region. Here, the patterns of the non-conductive region and the conductive region may be reversed. Here, the ratio of the conductive area to the entire area can take any value from 1 to 100%, but is preferably about 5 to 40%. In addition, the shapes of the conductive region and the non-conductive region can be freely selected, such as square, rectangle, circle, or ellipse, depending on the conditions of the recording device such as the recording needle and return electrode, and their arrangement can also be changed. Can be set depending on device conditions.

FIG. 4 is an explanatory diagram of the appearance of another discharge destruction recording medium of the present invention. (1) is a non-conductive region of the 8W layer, and (2) is a conductive region. Here, the ratio of the conductive area can take any value from 1 to 100% with respect to the total area, but it is 5 to 4%.
Approximately 0% is desirable.

[Effect]

By making the conductive area a part of the protective layer in this way, the selectivity of the material such as resin used for the non-conductive area is increased, the color etc. can be freely selected in the non-conductive area, and various designs can be created. It is also possible to form characters such as . Further, since a material regardless of conductivity can be used for the non-conductive region, recording sensitivity and print quality can be improved. Furthermore, since there are fewer restrictions on the material of the protective layer, it becomes possible to obtain a discharge rupture recording medium with better resistance.

Next, the present invention will be explained in detail with reference to FIGS. 5 and 6.

[Example 1] FIG. 5 shows a cross-sectional conceptual diagram of printing.

Black ink is applied on a PET support (5) with a thickness of 188 μm using a roll coater, and a colored layer (6) with a thickness of 5 μm is formed.
was formed. Further, aluminum was deposited to a thickness of 50 nm by vacuum evaporation to form a discharge recording layer (4). On top of this, as a protective layer (3), acrylic resin in which 20% silver powder was dispersed was printed using gravure printing to print square halftone dots with a side of 0.1 mm at 5 mm dots and a thickness of 3 μm, and conductive areas ( 2) was obtained. The area ratio of the halftone dots at this time was 25%. Further, white ink was applied on top of this using a roll coater, and after sufficient leveling, it was dried to form a non-conductive region (1) with a thickness of 2 μm to obtain protection N (3). The discharge destruction recording medium thus obtained was cut into card shapes to obtain test pieces. As can be understood from the drawing, the conductive region (2) of the discharge breakdown recording medium shown here is thicker than the non-conductive region (1), and the return electrode (8) of the discharge breakdown recording device is thicker than the non-conductive region (1). The contact is made selectively and efficiently.

When a potential of -4 OV was applied to the recording needle (7) and recording was performed on the thus obtained test piece as shown in FIG. 5, good printing results were obtained. Here, return electrode (
8) had a sufficient contact area to always be in contact with the conductive region (2).

[Example 2] FIG. 6 shows a cross-sectional conceptual diagram of printing.

Black ink is applied on a PET support (5) with a thickness of 188 μm using a roll coater, and a colored layer (6) with a thickness of 5 μm is formed.
was formed. Further, aluminum was deposited to a thickness of 50 nm by vacuum evaporation to form a discharge recording layer (4). On top of this, as a protective layer (3), first coat an acrylic resin with 20% silver powder dispersed in it using a gravure coater in the form of stripes with a width of 200 mm and a pitch of 600 mm, with a thickness of 3 μrrl'7.
'A conductive area (2) was obtained. Furthermore, from above this, use a gravure coater to apply 2μ of white ink to areas other than the conductive areas.
m was applied to form a non-conductive region (1). The discharge destruction recording medium thus obtained was cut into card shapes to obtain test pieces. The area ratio of the conductive region at this time is 27%.

When a potential of -4 OV was applied to the recording needle (7) and recording was performed on the thus obtained test piece as shown in FIG. 6, good printing results were obtained. Here, return electrode (
8) runs at a position where it can always come into contact with the striped conductive region (2).

〔Effect of the invention〕

In a discharge rupture recording medium in which at least a discharge recording layer and a protective layer are sequentially provided on a support, since the protective layer is composed of a conductive area and a non-conductive area, the selectivity of the material in the non-conductive area is improved. In addition to improving printing sensitivity and printing quality, it also allows for free selection of colors, etc.
It is also possible to form various designs and characters.

[Brief explanation of the drawing]

1 and 2 are cross-sectional explanatory diagrams of the discharge rupture recording medium according to the present invention, FIGS. 3 and 4 are external explanatory diagrams of the discharge rupture recording medium according to the present invention, and FIGS. FIG. 6 is a cross-sectional printing conceptual diagram of Example 1 and Example 2, respectively. (1)...Non-conductive area (2)...Conductive area (3)...Protective layer (4...Discharge recording layer (5...Support (6...Black layer (7)... ...Recording needle (8...Return electrode (9...Recording power source patent application Person: Toppan Printing Co., Ltd. Representative Kazuo Suzuki) Figure 3 Figure 4 Figure 5 Figure

Claims (4)

[Claims] (1) A discharge recording medium comprising at least a discharge recording layer and a protective layer sequentially provided on a support, the protective layer comprising a conductive region and a non-conductive region. (2) The discharge breakdown recording medium according to claim 1, wherein the conductive region has a halftone dot shape. (3) The discharge destruction recording medium according to claim 1, wherein the non-conductive region has a dot shape. (4) The discharge destruction recording medium according to claim 1, wherein the conductive region is strip-shaped.