JPH04307489A - Recorded information display part - Google Patents

Abstract

PURPOSE:To facilitate the visual discrimination of characters and graphics displayed on a visible information display part by providing a clearance between a support and the visible information display part. CONSTITUTION:In a recorded information display part provided with the recordable and evasable visible information display part on its support, a clearance part 4 is provided between a support 3 formed by laminating a magnetic recording layer 7 and a visible information recording part 2. Accordingly, the characters and graphics displayed on the visible information recording part 2 can be visually discriminated clearly. The visual discrimination can be made more clear fauorably by laminating a light reflection layer 6 on the surface of the support 3 at its clearance part 4.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to information recording media such as optical cards, optical disks, IC cards, magnetic cards, magnetic disks, etc., and in particular, it relates to information recording media such as optical cards, optical disks, IC cards, magnetic cards, magnetic disks, etc., and in particular, it relates to information recording media such as optical cards, optical disks, IC cards, magnetic cards, and magnetic disks. The present invention relates to an information recording display body having the following.

0002

BACKGROUND OF THE INVENTION Conventionally, many types of information recording media have been used, but the information content recorded on any of the information recording media cannot be confirmed by direct visual inspection. If the information recorded on such a medium or a part of the information is displayed on the medium in a state where it can be viewed directly, it will be very convenient for those who use the medium. From this point of view, technology related to information recording and display cards that can visually display information recorded on magnetic cards using visible information recording and display materials that can be recorded or erased has already been reported (Japanese Patent Application Laid-Open No. 2-26909
No. 7).

0003

[Problems to be Solved by the Invention] However, since this technology is based on a method of controlling the light transmittance of a thin material, the difference between the transparent part and the non-transparent part in the visible recording display layer is small. When attempting to display a large amount of information in a small area, there is a problem in that the characters, figures, etc. to be displayed become small and difficult to visually distinguish.

0004

[Means for Solving the Problems] Therefore, as a result of intensive studies to solve the problems, the inventors of the present invention found that the above problems could be solved by creating an information recording display body having a specific configuration. reached. That is,
SUMMARY OF THE INVENTION An object of the present invention is to provide an information record/display body in which characters and figures displayed on a visible record/display part can be easily distinguished visually.

[0005]The purpose is to provide an information recording display body having a visible information display section that can be recorded and erased on a support, and a gap is provided between the support and the visible information display section. This can be easily achieved by an information recording display body characterized by the following. The present invention will be explained in detail below. In the present invention, the recordable and erasable visible information display section means that information based on the content recorded on the information recording medium is written on the visible information display section by means such as heat or light irradiation.
Characters, numbers, figures, etc. are displayed in a visible state, and the written characters are erased by means such as heat or light irradiation, and the display and erasure are reversibly repeated any number of times. It is something that can be done.

The visible information display section includes a visible information display layer and a support layer that supports the layer. The support layer is not particularly limited as long as it is a transparent material, but it is usually made of polyolefin, polyvinyl chloride, polyester, acrylic resin, silicone resin, polyester ether, polycarbonate, polyimide, polyether ketone, polysulfone, or polyurethane. , polyamide, polyacetal,
It is preferable to use plastics such as styrene resins, epoxy resins, unsaturated polyester resins, melamine resins, phenol resins, and urea resins, or glass, and specifically, it is preferable to use plastics such as polyethylene terephthalate. When using plastic, it is preferable to select and use a plastic that has a glass transition temperature that is at least 10° C. higher than the temperature at which the light transmittance of the compound forming the visible information display layer changes.

[0007] The support layer is usually in the form of a thin film, and its thickness is not particularly limited, but it is approximately the same or more than the thickness of the visible information display layer, preferably 5 to 5 times the thickness of the layer. Approximately 10 times the thickness, specifically approximately 10 μm to 1 mm, is suitable. As the visible information display layer, for example, JP-A-54-119377, JP-A-55-1541,
No. 98, Japanese Unexamined Patent Publication No. 2-269097, or '
Known examples include those described in Kagaku to Kogyo, Vol. 42, No. 4, pp. 94-97 (1989). That is, when recording and displaying by heat, there are methods that utilize phase change of fatty acids dispersed in polymers, methods that utilize the compatibility-incompatibility phenomenon of polymers, or methods that utilize phase changes of polymers. Examples include things. In addition, when recording and displaying by light irradiation, there are methods that utilize phase transition due to photoisomerization of polymer chains, methods that utilize photoisomerization phenomenon in the alignment matrix, or methods that utilize the photoisomerization phenomenon of liquid crystals in the polymer matrix. Examples include those that utilize phase separation.

[0008] Examples of materials that utilize the phase change of fatty acids dispersed in polymers include polyvinyl chloride, a copolymer of vinylidene chloride and acrylonitrile, a copolymer of vinyl chloride and vinyl acetate, and saran resin. Alternatively, a polymer compound such as a mixture of polyvinyl chloride and styrene-acrylonitrile copolymer, and fatty acids such as tricontanoic acid, hexacosanoic acid, tetracosanoic acid, docosanoic acid, behenic acid, or stearic acid, especially higher fatty acids having 12 or more carbon atoms. Examples include those in which . A mixture of a vinylidene fluoride-hexafluoroacetone copolymer and a low-molecular-weight methyl methacrylate is an example of a compound that utilizes the compatibility-incompatibility phenomenon of polymers. Examples of what can be used include polymeric compounds such as poly(1,4-benzenethiol-co-1,4-divinylbenzene). Further, examples of compounds that utilize phase transition due to photoisomerization of polymer chains include conjugated polymer compounds consisting of benzenedithiol and divinylbenzene. Examples of devices that utilize the photoisomerization phenomenon in an alignment matrix include those in which a compound that reversibly photoisomerizes, such as azobenzene or fulgide, is dispersed in a polymeric cholesteric liquid crystal. Examples of methods that utilize phase separation of liquid crystal include methods in which nematic liquid crystal is dispersed in a polymer matrix and microparticles of liquid crystal material are formed by phase separation.

In the present invention, any of these can be applied, but it is preferable to use one that performs recording and display using heat. In particular, it is preferable to use one that utilizes the phase change of fatty acids dispersed in a polymer. Specifically, the polymer compound is a copolymer of vinyl chloride and vinyl acetate, and the fatty acid is behenic acid, hexacosanoic acid, It is preferable to use a visible information display layer obtained by dispersing a higher fatty acid having 12 or more carbon atoms such as tricontanoic acid or stearic acid.

[0010] In such a case, the fatty acid and the polymer compound are
A solution containing these compounds is obtained by dissolving them in a solvent that can dissolve both of them, and this is cast onto a support layer to form a thin film-like visible information display layer and dried. Configures a visible information display section. The solvent used is
Although there are no particular limitations on the solvent as long as it can dissolve the polymer compound and fatty acid, specifically, it is preferable to use an organic solvent such as tetrahydrofuran. The amount of fatty acid blended is usually 1 to 50 parts per 100 parts of the polymer compound.
The amount is preferably about 10 to 40 parts.

[0011] An overcoat layer may be provided on the surface of the visible information display layer in the visible information display section in order to prevent damage to the visible information display layer that occurs during writing and erasing with a thermal head or the like. Examples of the overcoat layer include a layer made of an ultraviolet curable resin, a layer containing fine silica powder, and a silica coating layer coated by a sol-gel method. These may be used alone or in combination.

[0012] Next, the above-described visual information display section is placed on a support. Such a support is not particularly limited as long as it can support the above-mentioned visible information display section, and various materials may be used depending on the purpose. When the information recording display of the present invention is used for an optical card, an IC card, a magnetic card, etc., a visible information display section may be provided on the card as a support. For example, in the case of an optical card, there is an invisible information recording section on a polycarbonate board.
Two-layer or three-layer Se-Te based write-once optical recording material,
Te-based write-once optical recording materials such as TeC and TeOX, organic dye-based write-once optical recording materials such as cyanine-based and phthalocyanine-based, furthermore, Tb-Fe-Co-based magneto-optical recording materials,
A visible information display section may be provided using a rewritable optical recording material such as a chalcogenite phase change recording material formed by coating or vapor deposition.

[0013] The present invention is characterized in that, when forming the above-mentioned visible information display section on such a support, a gap is provided between the support and the visible information display section. Here, the method of forming the void is not particularly limited, and examples include a method of forming the void through a spacer such as transparent plastic or glass; A simple method is to apply the agent in stripes and adhere the visible information display section to the stripes to form the voids. Various methods can be used to apply the adhesive in stripes onto the support, and for example, it is preferable to use a method in which the adhesive is applied with a wire bar coater or the like. The adhesive is not particularly limited, and common adhesives such as epoxy adhesives, phenol adhesives, vinyl resin adhesives, and acrylic adhesives can be used.

The thickness of the gap between the support and the visible information display area is not particularly limited, but is usually 0.01 mm.
A thickness of approximately 1 mm to 1 mm is sufficient. By providing a void, the characters displayed on the visible information display section,
Figures, etc. can be clearly identified visually. Although the reason for this is not clear in detail, it is thought that there is a difference in the refractive index of light between the visible information display section and the void section. therefore,
Usually, a gas such as air exists in the gap, but if necessary, it may be filled with a liquid or the like having a different refractive index from that of the visible information display section.

Furthermore, in the present invention, by providing a gap between the support and the visible information display section, characters, figures, etc. displayed on the visible information display section can be clearly visually distinguished, but preferably. can be visually identified more clearly by laminating a light-reflecting layer on the surface of the support. The light reflecting layer is not particularly limited as long as it can substantially totally reflect the light incident through the visible information display section. Specifically, an aluminum vapor-deposited layer etc. can be mentioned.

[0016]

[Examples] The present invention will be explained below in detail with reference to Examples, but the present invention is not limited to the following Examples unless the gist thereof is exceeded. Example 1 3 parts by weight of vinyl chloride/vinyl acetate copolymer (manufactured by Nippon Zeon Co., Ltd., "GEON400X150ML"), 1 part by weight of stearic acid (manufactured by Nippon Oil & Fats Co., Ltd., Sakura Brand Stearic Acid)
Part by weight is tetrahydrofuran (manufactured by Kishida Chemical Co., Ltd., Reagent 1)
grade) was dissolved in 15 parts by weight. The film thickness after drying the above solution on a 100 micron thick biaxially stretched polyethylene terephthalate film (manufactured by Diafoil Co., Ltd.) using a wire bar coater (outer diameter 8 mm, 8 thin wires/10 mm winding) It was applied so that the thickness was 20 microns.

After removing the solvent from the coating film, heat treatment was performed to prepare a polyester film carrying a transparent recording layer. Using a wire bar coater (outer diameter 8 mm, 24 thin wires/10 mm winding), adhesive (Cemedine for photography, manufactured by Cemedine) was applied in stripes on the back side of the film.
A film made by laminating blue-colored silver origami (manufactured by Grimm Hobby Co., Ltd., Color Foil) and coated with a magnetic recording medium (
A floppy disk (manufactured by Kasei Verbatim Co., Ltd.) was laminated in the same manner to obtain an information recording display.

The obtained information recording display body was printed using a thermal printer (manufactured by Toshiba Corporation, word processor JW-95).
H), and characters were printed on the recording layer. The white characters appearing on the recording layer were clearly readable visually both from the front and from an oblique direction. The printed display was heated for 10 seconds in an oven maintained at 54 degrees Celsius, and when the temperature returned to room temperature, the characters disappeared and the transparent recording layer returned. When characters were printed again in the same manner as above, the area heated by the thermal head became cloudy, and the characters could be clearly read visually from both the front and diagonal directions, just as before erasing. Example 2 Same as Example 1 except that instead of laminating blue-colored silver origami as a light reflecting agent, a polyester film carrying a recording layer and a blue origami without a reflective layer were laminated. An information record display body was obtained. Although the characters printed by the thermal printer were slightly less white than those in Example 1, they were easily legible visually both from the front and from an oblique direction. Comparative Example 1 In Example 1, a glass bar with an outer diameter of 8 mm was used instead of the wire bar coater when applying the adhesive, and the polyester film supporting the recording layer and blue-colored silver origami were coated so that no air layer remained. An information recording display body was obtained in the same manner as in Example 1 except that the layers were laminated. The characters printed by the thermal printer were easily readable visually from the front, but were difficult to read from an angle. Comparative Example 2 In Example 2, when applying the adhesive, a glass bar with an outer diameter of 8 mm was used instead of the wire bar coater to laminate the polyester film carrying the recording layer and the blue colored origami so that no air layer remained. Except for the above, an information recording display body was obtained in the same manner as in Example 2. The characters printed by the thermal printer were difficult to visually read from both the front and diagonal directions.

[0019]

Effects of the Invention According to the present invention, in an information recording display body having a rewritable visible information display section, a layer having voids is provided below the rewritable visible recording display layer, and if necessary, a layer having voids is provided. By configuring an information recording display by providing a light reflective layer below the layer containing the information, visual interpretation of visible information is significantly improved, and as a result, great convenience can be provided to the user.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of a visible information display section of an information recording display body that is an embodiment of the present invention.

[Explanation of symbols]

1 Overcoat layer 2 Rewritable visible information recording display layer 3
Base material layer 4 Adhesive layer 5 with voids Colored layer 6 Reflective layer 7 Magnetic recording layer

Claims (2)

[Claims] [Claim 1] An information recording and display body having a visible information display section that can be recorded and erased on a support, characterized in that a gap is provided between the support and the visible information display section. Record display body. 2. The information recording and display body according to claim 1, wherein the support has a light reflecting layer laminated on the surface of the support on the void side.