JPS58181676A - Reproduction of ink sheet - Google Patents

Abstract

PURPOSE:To leave no concave on the surface of an ink layer by attaching and fixing an powder ink on a base layer under pressure with a static power after supplied between the ink layer and an electrode opposite thereto inreproduction of an energization transfer type ink sheet. CONSTITUTION:When the mixture 7 of a powder ink 71 and a magnetic powder 72 is supplied between an electrode position electrode 2 and an electrode sleeve 4 oppoite thereto with an electric field generated, the powder ink 71 separates from the magnetic powder 72 attracted with a magnet 6 and moves to the electrode 2 with the application of a stronger electric field than the electrostatic attraction between the powder ink 71 and the magnetic powder 72 caused by firction so that it is attached to an ink layer 1b. In this case, more of the powder ink 71 is attached to missed section 1c because the missed section 1c of an ink layer 1b generate a larger electrostatic power. Thereafter, as a specified pressure is applied through a pressure roller, the attached ink is deformed plastically to be fixed on a base layer 1a. Thus, the surface of the ink layer becomes roughly flat thereby reproduction of an ink sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an ink layer on an ink sheet after a part of the ink layer is transferred to a recording medium for recording. The present invention relates to an ink sheet recycling method.

Conventionally, an ink layer of an ink sheet made by laminating an ink layer on a conductive base layer is used as a recording medium, and a needle-shaped recording electrode is placed on the base layer of the ink sheet and a return path is arranged at a predetermined distance from the ink layer. With electrodes? There is a known electrical transfer method in which the ink layer is brought into contact with the ink sheet, an image signal voltage is applied between the recording medium and the return electrode, the ink sheet is energized, and a part of the ink layer is melted by Joule heat and transferred to the recording medium. .

In addition, the ink layer of an ink sheet made by laminating an ink layer on a base layer is stacked on a recording medium, a heating element is placed on the base layer side, and an image signal voltage is applied to this heating element to cause the heating element to generate heat, thereby forming a base layer. A thermal transfer method is known in which a layer and an ink layer are heated to melt a portion of the ink layer and transferred to a recording medium.

Then, as an ink sheet recycling method, a part of the ink layer is transferred to the recording medium by these energization transfer methods and the thermal transfer method, and after that, ink is attached to the missing part of the ink layer to regenerate the ink sheet. After applying a predetermined charge to the ink layer of the ink sheet using a corona charger,
It is known that a powder ink having a polarity opposite to these charges is supplied to an ink layer and the powder ink is adhered to the ink layer by electrostatic force.

However, in this ink sheet recycling method, the amount of charge in the missing part of the ink layer after charging the ink layer with a corona charger is smaller than the amount of charge in the ink layer other than the missing part, so it is not enough to fill the missing part of the ink layer. Since it is not possible to supply a sufficient amount of powder ink, there is a drawback that recesses remain on the surface of the ink layer even after regeneration.

In addition, as an ink sheet recycling method, a heated roller is pressed against an ink roller coated with hot-melt ink to melt the ink on the ink roller, and then the melted ink is applied to the ink layer of the ink sheet to form the ink layer. Those that reproduce are known.

However, since this ink sheet recycling method does not involve applying ink, there is a drawback that recesses remain on the surface of the ink layer even after recycling.

An object of the present invention is to provide an ink sheet recycling method that can eliminate the above-mentioned drawbacks.

A feature of the present invention is that an electrode for the electric layer is arranged on the pace layer side of an ink sheet formed by forming an ink layer on one surface of the base layer,
Counter electrodes are placed on the ink layer side at a predetermined interval, and while a predetermined voltage is applied between these electrodes and the counter electrode, a powder ink consisting of almost the same components as the ink layer is inked. The powder ink is supplied between the layer and the counter electrode, and the charge possessed by the powder ink or the charge induced in the powder ink is caused by the electrostatic force received from the electric field formed between the layer electrode and the counter electrode. is applied to the ink layer, and then the powder ink adhered to the ink layer is pressurized to fix it on the base layer.

The R51 of the present invention will be explained in detail below with reference to the drawings.

In FIG. 1, reference numeral 1 indicates an ink sheet. This ink sheet 1 is formed by laminating a heat-meltable ink layer 1b having a resistivity of 10Ω1 or more on one surface of a conductive base layer 1a.

The base layer 1a is formed by uniformly dispersing or dissolving a conductive material in a conductive resin or a binder resin. Resins suitable for the binder resin of the base layer 1a include polyester, polycarbonate, polyvinyl butyral resin with a softening point of 150C or higher, styrene resin, acrylic resin such as methyl methacrylate, ethyl acrylate, and n-butyl methacrylate; Silicone resin, urea resin, fluororesin, polyurethane, vinyl chloride resin, polyimide resin, lid polymer 4
Basic organic and inorganic conductive materials such as ammonium salts are used.

The base layer 1a may have anisotropic conductivity, in which the resistivity in the thickness direction is lower than the resistivity in the planar direction, and the resistivity in the thickness direction varies depending on the position. As the base layer 1a having anisotropic conductivity, for example, as shown in FIG. 3, a number of conductive linear materials 1al are embedded in an insulating resin layer 1a2 in a columnar manner in the thickness direction; As shown in FIG. 4, the conductive powder 1a3 is dispersed in the insulating resin 1a2 and the conductive powder 1a3 is oriented in the thickness direction, or as shown in FIG. There is one in which a conductive material 1a4 is filled into a hole in an insulating resin 1a2.

The ink layer 1b is made by uniformly dispersing a powder coloring material in a mixture of a pressure plastic resin that plastically deforms when a predetermined pressure is applied and a thermoplastic resin having a melting point of 50C to 200C, It melts when the temperature reaches a predetermined temperature or higher, and
It undergoes plastic deformation when pressure above a predetermined level is applied.

The pressure plastic resin of the ink layer 1b may include naturally occurring ones such as vegetable waxes, animal waxes, solid fats, and mineral waxes, as well as higher fatty acids or derivatives thereof, or other waxes having an internal melting point of 601? The above are used. Suitable examples of the pressure plastic resin for the ink layer 1b include waxes in a narrow sense such as carnauba wax, starch wax, candelilla wax, sugar cane wax, beeswax, and wool wax; mineral waxes such as montan wax, paraffin wax, and microcrystalline wax; and palmitic acid. , stearic acid, droxystearic acid, behenic acid, etc. with 16 carbon atoms
to 22 solid higher fatty acids; oleic acid amide, stearic acid amide, palmitic acid amide, N-hydroxyethyl-hydroxystearamide, N,N ethylene-bis-stearamide, N,N'-ethylene-bis-
Higher carbon atoms (such as ricinolamide, N,N'-ethylene-bis-hydroxystearylamide) having 16 to 22 carbon atoms (
Hereinafter, the term "high grade" will be used to mean a carbon number of 16 to 22. ) Amides of fatty acids; for example, metal salts of higher fatty acids such as alkali metal salts, alkaline earth metal salts, quick lead, aluminum salts such as aluminum stearate, magnesium stearate, calcium palmitate; palmitic acid hydrazide, stearin Higher fatty acid hydrazide such as acid hydrazide; myristic acid!
- P-hydroxyanilides of higher fatty acids such as hydroxyanilide, P-hydroxyanilide of stearic acid; θ of higher fatty acids such as β-diethylamine ethyl ester hydrochloride of lauric acid, β-diethylaminoethyl ester hydrochloride of stearic acid - diethylaminoethyl ester hydrochloride; higher fatty acid amide-formaldehyde condensate, such as stearic acid amide-formaldehyde condensate, palmitic acid amide-formaldehyde condensate; dye or dye paste having an amino group and 4 mol per dye or dye paste; Salt formation reaction products with higher fatty acids, such as stearic acid, palmitic acid or myristic acid, and dyes or dye pastes; hydrogenated oils such as hydrogenated castor oil and hydrogenated tallow oil; polyethylene wax, oxidation There are polyethylene, etc. An ink layer is a combination of two or more of these! The pressure plastic resin of b may be made of S.

Examples of the thermoplastic resin of the ink 711b include:
Vinyl chloride vinyl acetate copolymer, vinyl chloride vinylidene chloride copolymer, vinyl chloride acrylonitrile copolymer,
Acrylic acid ester acrylonitrile copolymer, acrylic acid ester vinylidene chloride copolymer, acrylic acid ester styrene copolymer, methacrylic acid ester acrylonitrile copolymer, methacrylic acid ester vinylidene chloride copolymer, methacrylic acid ester styrene copolymer,
Urethane elastomer, nylon-silicon thread resin, nitrocellulose-polyamide resin, polyvinyl fluoride,
Vinylidene chloride acrylonitrile copolymer, butadiene acrylonitrile copolymer, polyamide resin, polyvinyl butyral, cellulose derivatives (cellulose acetate butyrate, cellulose diacetate, cellulose triacetate, cellulose propionate, nitrocellulose, etc.), polycarbonate, styrene butadiene Copolymers, polyester resins, chlorovinyl ether acrylate copolymers, amino resins, various synthetic rubber-based thermoplastic resins, and mixtures thereof are used. It is preferable that the pressure plastic resin is mixed with the thermoplastic resin of the ink layer 1:) at a ratio of 201 sots or more.

As the coloring material for the ink layer 1b, various pigments and dyes such as carbon black, phthalocyanine, spirit black, alkali blue, benzidine yellow, fast red, methyl red, crystal violet, iron oxide, and cadmium sulfide are used.

The ink sheet 1 is produced by a sputtering method, an ion blating method, a vacuum deposition method, a solvent coating method, or the like. The thickness 11 of the paste layer 1a of the ink sheet 10 is approximately 1μm<A't<95μ4, preferably 7μm<1. (4oμ shoulder. Film thickness 12 of ink layer 1b of ink sheet 1 is 5μts<12<, 5r)
μm, preferably 10 μm<12 (30
It is μ bait. The ink sheet 10 pace pigeon 1a may be electrically conductive, and preferably has a resistivity of 10Ω or less. The ink layer 1b of the ink sheet 1 needs to have a resistivity of 10Ω or more.

As a recording method using the above-mentioned ink sheet 1, the ink layer 1b of the ink sheet 1 is used as a recording medium, and the base layer 18 of the ink sheet 10 has a needle-shaped recording electrode and a return electrode arranged at a predetermined interval from the needle-shaped recording electrode. There is a current transfer method in which the ink sheet 1 is energized by contacting the recording medium and the return electrode by applying an image signal current to the ink sheet 1 to melt a part of the ink layer 1b by Zeel heat and transfer it to the recording medium. .

In addition, as a recording method using the ink sheet 1, the ink layer 1b of the ink sheet 1 is placed on the recording medium by 1", a heating element is arranged on the side of the pace layer la, and an image signal current is passed through the heating element to generate heat. There is also a heating transfer method in which the element generates heat or the ink sheet 1 is irradiated with a laser beam to heat the paste layer 1m and the ink layer 1b to melt the ink 1filb and transfer it to the recording medium.

After a part of the ink layer 1b of the ink sheet 1 is transferred to the recording medium by these current transfer methods and heat transfer methods and recording is performed on the recording medium, the ink layer 1b of the ink sheet 1 has the following properties as shown in FIG. As shown in FIG. 1, a missing portion 1c is formed.

An ink recycling method for recycling the ink sheet 1 by attaching powder ink to the missing part 1c of the ink layer 1b of the ink sheet 1 having such a missing part 1c will now be described in detail.

As shown in FIG. 1, the ink sheet 10 base layer 1
The electrode for electrodeposition 2 is placed in contact with a. A voltage application circuit 3 is connected to this electrode for electrode 2 to set it to a predetermined potential. A counter electrode sleeve 4 is rotatably disposed on the ink layer 1b side of the ink sheet 1 at a predetermined distance therefrom. This counter electrode sleeve 4 is rotated in the direction of arrow a by a driving means (not shown). A holding member 5 is disposed inside the counter electrode sleeve 4, and a plurality of magnets 6 are fixed to the holding member 5 at predetermined intervals. The ink layer 1b of the ink sheet l is placed on the outer peripheral surface of the upper 8-counter electrode sleeve 4.
A mixture 7 in which a powder ink 71 made of the same components and having a predetermined electric charge is mixed with magnetic powder 72 such as iron powder to give a predetermined Jfw market charge to the powder ink 71 is used as the magnet 6.
It is held by the magnetic force of The powder ink 71 has an average particle size of 1 μm to 100 μm, preferably 3 μm.
~30 μm, and the square root of unbiased variance σ is ~0.5 μm
The thickness is preferably 30 μm. The mixture 7 of the powder ink 71 and magnetic powder 72 is moved as the counter electrode sleeve 40 rotates.

The above-mentioned inksee) 1 is moved in the direction of arrow b by a conveying means (not shown). A pair of pressure rollers 8 are provided on the side of the counter electrode sleeve 4 in the moving direction of the ink sheet l.
9 are arranged so as to be in pressure contact with each other. These pressure rollers 8 and 9 are rotated in the directions of arrows c and d by driving means (not shown).

After passing between the electrode for electrodepositing 2 and the counter electrode sleeve 4, the above-mentioned ink sea) 1 is connected to a pair of pressure rollers 8, 9.
Inserted between 0.

As shown in FIG. 6, the rotating shafts 8a and 9a at both ends of the pressure rollers 8 and 90 are connected to the holding parts 1'lo and 1', respectively.
1 and is rotatably held. The holding member 11 is fixed to an immovable member. One end of the holding member 1o is rotatably connected to one end of the holding member 11 by a connecting pin 12.

The other ends of these holding members 10 and 11 are provided with holes 1°a and 1°.
la is formed. Shafts 13 are arranged so as to pass through the holes 10a, lla of these holding members 10.11, and these shafts 13 are fixed to immovable members. The holding member 1o is rotatable about the shaft 13 within a predetermined range.

A locking piece 14 is provided at the upper end of the shaft 13,
A suppressing spring 15 is provided on the shaft 13 between the locking piece 14 and the holding member 1o. This spring 15 presses the holding member 1o downward to bring the pressure roller 8 into pressure contact with the pressure roller 9.

A voltage application circuit 16 is connected to the opposing X-pole sleeve 4 to set it to a predetermined potential. Above electrodeposition &2
An electric field is formed between the electrode sleeve 4 and the electrode sleeve 4 by the voltage application circuits 3 and 1G, which generates an electrostatic force that moves the charge of the powder ink 71 in all directions of the electrodeposition electrode 2.

For example, when the powder ink 71 has a positive charge, the voltage application circuit 3 sets the electrodeposition electrode 2 to a predetermined negative potential, and the voltage application circuit 1G sets the electrode sleeve 4 to a predetermined negative potential.
Let be a predetermined positive potential. In addition, in this case, opposing 1! The pole sleeve 4 may be grounded.

Between the electrode for electrodeposition 2 and the counter electrode sleeve 4 *-
When a mixture 7 of powder ink 71 and magnetic powder 72 is supplied between them with a field formed as shown in FIG. Since an electrostatic force stronger than the electrostatic attraction between the electric charge of the magnetic powder 72 and the electric charge of the powder ink 71 acts on the electric charge of the powder ink 71 due to the electric field, the powder ink 71 is moved toward the electrode for electrode 20 and the ink layer of the ink sheet 1 is moved. It attaches to 1b. In this case, since a current substantially flows between the electrode 2 for the electric layer and the counter electrode sleeve 4, the potential of the surface of the missing portion IC of the ink layer 1b is set as VA, and the missing portion of the ink layer lb If the potential of the other surface is VB, there is a voltage drop in the ink layer 1b, so IVAI>IV, so the magnitude of the electrostatic force acting on the charge of the powder ink 71 is determined by the difference in the missing part of the ink layer 1b. 11 of the ink layer 1c is larger than the portion of the ink layer 1b other than the missing portion 1c. Therefore, the powder ink 71 is in the ink layer 1b.
The missing part IC of the ink layer 1b from the part other than the missing part 1c of
This results in more adhesion to the surface. In order to make the difference between VA and VB more than a predetermined value, the resistivity of the ink layer 1b is set to 1.
Set to 00 wounds or higher.

Ink sheet 1 in which the base layer 1a has anisotropic conductivity
In this case, since the electric flux is concentrated, there is an advantage that the powder ink 71 can be more concentrated in the missing portion 1c of the ink layer 1b. The distance between the base layer 1a of the ink sheet 10 and the counter electrode sleeve 4 is set to be much larger than the thickness of the ink layer 1b.

The ink sheet 1 has the powder ink 71 adhered to the missing portion IC of the ink layer 1b by the electric field formed between the electrode for electrode 2 and the counter electrode sleeve 4, and the pressure roller 8,
The pressure rollers 8 and 9 apply a predetermined pressure to the powder ink 71a in the missing portion IC of the ink layer 1b, plastically deforming the powder ink 71a, and forming the base layer 1a.
Let it settle in. The pressure means for fixing the powder ink 71a supplied to the missing portion IC of the ink layer 1b of the ink sheet 1 to the base layer 1a by applying pressure and plastically deforming it is not limited to the above-mentioned embodiment. do not have.

Incidentally, the mixture 7 of the powder ink 71 and magnetic powder 72?
: Instead of the counter electrode sleeve 40 that moves the mixture 7 of the powder ink 71 and the magnetic powder 72 and also serves as an electrode, the sleeve that moves the mixture 7 of the powder ink 71 and the magnetic powder 72 and the counter electrode may be arranged separately. With the powder ink having conductivity and magnetism held on the surface of the ink sheet 40, this powder ink may be supplied to the missing portion IC of the ink 711b of the ink sheet 1. In this case, when the powder ink approaches the base layer 1a of the missing part 1c of the ink layer 1b of the ink sheet 1, charges of opposite polarity to the charges of the base layer 1a are fermented in the powder ink, and magnetic The electrostatic force overcomes the binding force and the powder ink forms the missing part IC of the ink layer 1b of the ink sheet 1.
Attach to.

Furthermore, the means for supplying charged powder ink between the electrode for electrode 2 and the counter electrode and between the missing portion of the ink layer 1b of the ink sheet L and the counter electrode includes:
The present invention is not limited to the above-described embodiments, and may include a fur brush development method, a pressure development method, a microfield donor method, a powder cloud method, etc., which are known as methods for developing electrostatic latent images in electrophotography. It may be an applied one.

Next, an experimental example will be shown to confirm the effects of the present invention.

Experimental Example A mixture of 481 parts of polyethylene wax having a melting point of 90C and 2 parts by weight of nigrosine was kneaded in a heated roll mill, cooled, and then ground in a dienodomin mill to obtain a powder ink. These powder inks were classified using a classifier, and the average particle size was 11μ, and the square root of unbiased variance σ
I obtained a powder ink whose thickness is 6.1 μm, and the thickness is 30 μm as the upper d pin ink sheet 1.
The resistance in the thickness direction is 3Ω, and the surface resistance is 3X10
40 parts of fine ferrite powder with an average particle size of 0.7μ, 483% of polyethylene wax with a melting point of 90C, and 2 parts by weight of nigrosine are added to the anisotropically conductive base layer 1a having an average particle size of 0.7 μm. Ink layer 1 consisting of 10 Bt parts of conductive carbon blank and having a film thickness of 25 μm
A material formed by laminating B was used.

Using this ink sheet 1, the ink layer 1biC of the ink sheet 1 is recorded on a recording medium by the above-described current transfer method.
i number of missing sICs were formed.

Next, as shown in FIG. 1, the powder ink is held in the opposing 11-pole sleeve 4, the distance between the opposing electrode sleeve 4 and the ink sheet 1 is set to 1000 μm, and the pair 2 of the same tube sleeve 4 and the electronic display The ink sheet 1 is moved so as to pass between the IIL pole 2, and the pole sleeve 4 is grounded on the opposite side, and the electrode 2 is set at a height of 1250 mm to form the ink layer 1b of the ink sheet 1. Powder ink was supplied and adhered to the missing IC.

Next, stainless steel rollers with a diameter of 80 m are used as the pressure rollers 8 and 9, the nip width of these pressure rollers 8 and 9 is 11111, and the nip width is 5°0~/
With the pressure rollers 8.9 in pressure contact with the linear pressure of l in e, powder ink was supplied to the missing part IC of the ink layer 1b between them while rotating the pressure rollers 8 and 9. When the ink sheet 1 was folded in half and the powder ink was pressed, the powder ink was plastically deformed and fixed on the base layer 1a, and the surface of the ink layer 1b became substantially flat.

In the ink sheet recycling method of the present invention, more powder ink is attached to the missing parts of the ink layer than to other parts, so the ink sheet can be recycled so that the surface of the ink layer becomes substantially flat.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an apparatus for implementing the present invention, FIG. 2 is a diagram for explaining the present invention, and FIGS. 3 to 5 are diagrams showing other base layers of the ink sheet used in the present invention. FIG. 6 is a partially cutaway perspective view showing the embodiment, and FIG. 6 is a perspective view showing the pressure roller of the apparatus shown in FIG. 1.3, 1... Ink sheet, 1a... Base layer, 1b...
・Ink layer, LC...missing part, 2...for blasphemy! very,
3,1G...voltage application circuit, 4...opposed ti misleve 8,9...pressure roller, 71...powder ink, 72...magnetic powder candle 9 40% 5 prongs

Claims (1)

[Claims] The base of an ink sheet after a part of the ink layer of the ink sheet is formed on one surface of a conductive base layer with an ink layer having a resistivity of 109 (minimum) or more and is transferred to a recording medium for recording. A state in which an electrode for electrodepositing is placed in contact with the layer, a counter electrode is placed at a predetermined distance from this on the ink layer side of the ink sheet, and a predetermined voltage is applied between these electrodes for electrodepositing and the counter electrode. Then, a powder ink made of the same components as the ink layer is supplied between the ink layer and the counter electrode, so that the charge possessed by the powder ink or the charge generated in the powder ink is made to face the electrode for electrodeposition. The powder ink is attached to the ink layer by the electrostatic force received from the electric field formed between the ink layer and the ink layer, and then the powder ink attached to the ink layer is pressurized and fixed to the base layer. How to recycle ink sheets.