JPS5957788A - Recording medium - Google Patents

Abstract

PURPOSE:To provide a recording medium capable of being easily produed from inexpensive materials and capable of developing acolor in sufficient density with low energy, wherein a layer of a metal capable of librating electrons through oxidation such as Al, a color former capable of forming a color through recution and a metallic compound are combined with each other. CONSTITUTION:A base 1 (e.g., a paper, a plastic film, a metallic foil) is provided at least on a surface thereof with a conductive layer 2 comprising a metal (e.g., Mg, Al) capable of librating electrons when being oxidized by impressing a voltage thereon. A conductive binder layer 3 incorporating a color material capable of forming a color or being discolored when being reduced by impressing a voltage thereon [e.g., a tetrasolium salt of the formula (wherein R is phenyl, alkyl; R' is H, alkyl, phenyl, COOC2H5 or the like)] and a metallic compound (e.g., an oxide of Zn, Ti or the like, a sulfide of Cd or the like) is provided on the surface of the base 3 to obtain the recording medium. EFFECT:Recording is accomplished by impressing a low voltage of not higher than 10V.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording medium that requires less electrical energy to acquire.

As a conventional recording medium, end t1 - recording method, number *.

Destruction record 0 method, it'Q small: Ki 10,000 style or song t1
4. A primary coloring type used in a thermal recording method and the like and a secondary coloring type used in an electrostatic recording method are known. In a primary color recording medium, a self-image is obtained only by the energy given during writing, so the number is 10.
V - divides the current of several 1aav and the small current of several 10mA,
In the case of a secondary coloring type recording medium V, the image obtained by performing toner density with a pressure of 1 [JOV or more and a relatively small energy of several μA current] is expressed as t(1 energy The energy consumption [d] is large in both methods (2).In recent years, such recording
As various media have become widely used in commercial fields, there has been a demand for recording media that consumes less energy and is capable of high-speed recording. It is important to reduce the energy consumption in order to make the power output (2) ton / 11 shi into P general 1. However, it is important to use less energy. In order to reduce the energy of self-recording media as a substitute for the O direction, low-temperature coloring pyjisero is inevitably obtained 1, at!N
32 is a minimum requirement because the storage stability of the body will be reduced, and the recording media in the Aton Recording Method, the Hou117 Destruction Group P Power Method, and the Moekan Heat Sensitive Recording Method C2 are all used for recording. Since it has an energy threshold of 14, recording itself cannot be performed with energy including i11 below the threshold f14, and the thermal energy that hits the recording medium is large as usual.

Therefore, the purpose of the invention of wood was to record C including the enfolded energy.
The objective is to provide a recording medium with low energy consumption.

In order to achieve the above object, the present inventor has conducted research on Jilt.
Oxidation of aluminum, etc. (T← from two, gold F which releases children)
The present invention was achieved by discovering that recording can be achieved by applying a low η1 of 10 V or less and pressure by combining the r% layer, a coloring agent with a color forming property of yellowish color, and a compound in gold 1. This is what I did.

As will be described in more detail below, the present invention provides a method for applying a voltage to the surface of a substrate having at least a conductive layer containing a metal that emits electrons when oxidized by the application of voltage. The main idea is a recording medium characterized by being formed with a single layer of a conductive binder containing a color T (and a metal compound).

FIG. 1 is a V cross-sectional view showing an embodiment of the recording medium of Wood's invention, in which a conductive layer 1-ii is formed on the surface of a substrate 1, and a conductive layer 2 containing a metal that is oxidized by pressure application and releases particles. , and the color t that is reduced and colored or decolored by the ton pressure stamp 7JII.
(and a conductive binder layer 6 containing a metal compound) is successively supplemented.

As for the substrate 1 in (2) above, any material that provides the necessary rigidity and strength to the recording medium may be used, and divine paper, plastic film, metal foil, or a composite thereof may be used. I can do it.

As the metal contained in the conductive layer 2 that is more oxidized and emits electrons, a metal with a relatively large ionization value is used, such as Mg, Oa, AI, Zn,
re, Ni, Sn, Pb, etc. Among these, A1 is preferably used in terms of chemical stability, ease of loading, and cost, but is not limited to C2. A conductive layer is formed using these metals. A synthetic resin paint in which powder is dispersed, more preferably a conductive synthetic resin (several layers of paint) using a conductive synthetic side layer as a binder, may be formed by applying two coats on the substrate.

Guide 714. The conductive layer 2 is stable even under high humidity (needs to function as two electrodes, so the thickness is preferably 0.1 mμ or more, and the conductivity is serum resistance io).

A metal thickness of Ω or less is preferable.

As can be easily understood from the above explanation, if the conductive layer 2 itself has sufficient rigidity and strength,
It is sufficient to use a substrate having at least C2 on its surface a quadruple layer containing a metal which may be close to each other and which releases small molecules when oxidized.

As a coloring agent contained in the conductive binder layer 3 that develops color by being reduced upon application of an electric current, tetrazolium salt, which is generally expressed, is superior in terms of recording sensitivity and color development. The color hue of the tetrazolium salt can be arbitrarily set by selecting the substituents R and R in the above general formula.

In addition to tetrazolium salts, coloring agents include salts of metals contained in the conductive layer 2C2, which have a smaller tendency to ionize than the metals that release electrons when oxidized by voltage application, and which develop or discolor upon reduction. You can use it if you have it.

Examples include, but are not limited to, heteropolyphosphoric acids such as phosphomolybdic acid and their salts as color-forming types, and dyes such as basic dyes and vat dyes as decolorable types.

As a coloring agent for pi, other than these compounds can be used, regardless of whether it is an organic compound or an inorganic compound, as long as it is reductively colorable. May be used.

The metal compounds used in the present invention include oxides such as zinc, titanium, tantalum, cerium, zirconium, germanium, tungsten, or molybdenum, sulfides such as cadmium or antimony, or salts of molybdic acid or tungstic acid. can be mentioned. The metal compound described above is conductive and effectively transfers electrons to the coloring material when the metal in the outer layer 2 undergoes oxidation. Conductive binder dispersed in one layer 6
In addition to improving the electrical conductivity of No. 3, it also has a very large surface area, so electrons are distributed to the coloring material very efficiently. Furthermore, since these metal compounds have very strong surface adsorption ability, it is thought that the efficiency of distributing heavy molecules to the coloring material is further increased. When using a fully bent oxide semiconductor as a metal compound, the oxidation state of the metal is not uniform, and metal ions with a low oxidation state may partially coexist (in fact, this is preferable from the point of view of electrical conductivity). .Also, gold F
The oxide semiconductor may be of a type in which electrical conductivity is improved by doping with a different metal such as aluminum, iron, zinc, or nickel.

The conductive binder layer 3 that self-extinguishes the color former and metal compound described in ``2'' is a conductive binder, such as a quaternary ammonium salt or a sulfonate-based 61 conductive polymer, and a color former, a metal compound, and a conductive binder. It is possible to add an agent or diluent +1 (rIA) to form a paint, and spread it on the surface of the conductive layer 2 by a known coating method. Alternatively, the above-mentioned conductive layer,
If a synthetic molecule is used, the coloring state is likely to be affected by the wet IW, so it is better to use a fij-conducting polymer with minimal stirring or to use a flexible synthetic resin.

4ν (1) In addition to the binder 1 ring 3, an auxiliary agent may be added to the hue and to facilitate the transfer of electrons between the metal compound. Examples of the auxiliary agent include ethylene glycol, glycerin, and triethanol. Compounds that convert hydroxyl groups such as amine, jetanolamine, monoethanolamine, or propylene glycol can be mentioned, and the addition of these auxiliaries improves the efficiency of color development.

Furthermore, the conductive binder 1ζ43 may contain a pigment particulate agent that prevents re-agglomeration of the metal compound in the paint used in forming 1-5. The coating film condition of the binder layer 6 was also poor.

Since the above conductive binder layer 3 is applied with C2rE pressure in its immediate direction, 9 is preferable for forming the artist, but considering the color density and hiding property, it is 111 m to 20%1.
m, more preferably 6 μm to 10 μm.

To record on the recording medium of the present invention, as shown in FIG.
Connect one side to the $14 side and move the recording medium and recording needle in parallel C2, or arrange many recording sides and apply 4 juices to the appropriate record Q1 ( Start from step 2. The conditions for bending vary slightly depending on the recording medium, recording side, and type of image around f, but it is approximately 5 to 20 minutes.
V, 1 mA/♀1.

The energy provided by this voltage application (2) is what triggers writing, and this (: lighter color development (
However, due to the reducing action of the curtain plate, the coloring reaction progresses after the application of heavy pressure is finished.

When a voltage is applied to the recording medium of the present invention as described above, #I
2 t'≠ is achieved first by applying the voltage 'l
The 'electrons injected from li and jllp reduce the coloring agent in the conductive layer and cause a light color to develop, and the metal on the surface of the substrate is activated by electricity. When the metal in the layer becomes a metal cation, electrons are emitted, and the emitted electrons act on the colored Ml+ to cause coloring, so that the contrast of 1TIiI (fl) can be said to be the same as above.

In addition, when recording on the recording medium of the present invention, the conductive layer and the coloring agent can exchange electrons in a circular manner by cleaning the surface of the outer layer, improving conductivity, removing insulating materials, etc. , color development is promoted and broadened. However, the surface state and fl
(H's relationship with Shinaga is not necessarily clear.

Since the recording medium of the present invention is of a built-in energy type that can increase the width, high-speed recording fk can be performed with IOV and energy of about 1 mA.

The recording medium of the present invention described above can provide color development with a density of 7 minutes at low energy. Therefore, it is sufficient to supply an electrical signal to the recording needle at about IOV, and the ip! #-i directly via fA circuit 1. Since it is possible to simplify the recording device and make it into a small helicopter, it is possible to use electricity. (1
Can be driven by humans. The father is a primary color type, so the current I
There is no need for fP, standard settings, etc., and it is possible to downsize the recording device. μ, i is the city 1 of the present invention. The blasphemy medium has the advantage of being relatively inexpensive and easy to manufacture using a half-layer.

In addition to the above-mentioned effects, the recording medium of the present invention also has the advantage of high color development efficiency since it contains a metal compound in the conductive portion and the binder layer.

Below (2) Examples to more concretely illustrate the present invention:
Let me give you an example.

Example: An aluminum steam heating set with a slightly oxidized surface was used, and the λ layer surface was coated with the paint described above, and dried 1% L 7m.

Paint The recording paper obtained above each uses 10V
DC voltage was applied. At this time, the current was 1 mA. Immediately after recording, the color development was deep (KIN M'-703), but after 1 hour, the IJ value increased twice (approximately 0.8).

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the recording medium of the present invention, and FIG.
FIG. 4 is a cross-sectional view showing a method of performing a 512th dipping at 1/1 using the recording medium shown in the figure.

Claims (2)

[Claims] (1) On the surface of a substrate having at least a conductive layer containing a metal that is oxidized and emits electrons when applied with voltage, a color of 1 μm, which is reduced to produce or discolor by applying pressure, is applied.
A recording medium characterized in that a single layer of a conductive binder is formed between the r rows and a metal compound. (2) The medium described in item (1) of box +IX of the claims, characterized in that the conductive binder layer further contains an auxiliary agent.