JPH06219068A - Recyclable recording paper - Google Patents

Abstract

(57) [Summary] [Purpose] The recording material such as toner cannot be easily removed even by rubbing it with a hand or an eraser, it has excellent document preservability after recording, and it can be written with a pencil, pen, etc. Provide a reproducible recording paper that can be easily recycled. [Structure] The reproducible recording paper of the present invention comprises a recording paper (1) containing a heat-denaturing material (2) whose adhesion to a resin is weakened by heating.
A recording surface (2a) formed by coating or impregnating the recording paper (1) onto the recording surface (2a), and a recording agent is attached to the recording surface (2a) by an electrophotographic or thermal transfer recording device. By recording, after recording,
The recording material (9) can be reused by contacting it with a heat pressurizing means (8) or a heating means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducible recording paper used in an electrophotographic or thermal transfer recording apparatus and reusable by removing the recording material recorded on the recording surface.

[0002]

2. Description of the Related Art Conventionally, entry (or recording and printing)
An erasable paper that can easily erase the above-mentioned material is known, and for example, as shown in FIG. 8, a releasing member 12 is formed on a recording paper 1 (Japanese Patent Laid-Open No. 1-2972).
94, JP-A-4-67043). When this erasable paper is used in an electrophotographic recording device (electrophotographic recording device such as a copying machine, a facsimile, or an optical printer), recording (or printing) is performed by thermally fusing toner to the surface of the releasable member 10. ) Is performed, and the recording paper 1 is reused by erasing it.

[0003]

However, in the above-mentioned conventional reproducible recording paper, since the surface of the recording paper 1 is releasable, the adhesion between the toner and the recording paper 1 is poor, and it is rubbed with a hand or an eraser. Toner can be easily removed with just this. In this case, there is no problem if it is immediately recycled and used, but there is a problem that when the recorded document, which also has the original role of the recording paper, is stored, the record storability thereof is poor. Further, when writing directly on the recording paper 1 with a pencil or a pen, there is a problem that since the surface is releasable, the adhesion of the ink or carbon is poor, and the letters are easily faded. Further, if the entire surface of the recording paper has releasability, the frictional force generally decreases, and it becomes slippery. For this reason, when the paper is conveyed in the recording apparatus, there is a problem that the paper slips on the conveyance rollers or the like and the paper is jammed in the apparatus. Therefore, the present invention solves the above-mentioned problems of the related art, does not easily remove a recording material such as toner even when rubbed with a hand or an eraser, has excellent document preservability after recording, and writes with a pencil or a pen. It is also an object of the present invention to provide a reproducible recording paper that can be recycled and can be easily recycled by a reproducing device. A further object of the present invention is to provide a reproducible recording paper that can be smoothly transported in a recording device.

[0004]

In order to achieve the above-mentioned object, the reproducible recording paper of the present invention has a heat-denaturing material whose adhesion to a resin is weakened by heating, applied to the recording paper or in the recording paper. The recording surface is formed by impregnation (Claim 1). The reproducible recording paper is obtained by coating or impregnating the heat-denaturing material on or in the recording paper except for a part or all of the leading end margin of the recording paper or the side end margins of the recording paper. It is characterized (Claim 2). Then, in the above reproducible recording paper, after recording an image with a recording agent on the recording surface by a recording device of an electrophotographic system or a thermal transfer system, at the time of reproduction, a thermal pressurizing means is contacted to remove the recording agent (claim (3) Alternatively, the recording material is removed by bringing it into contact with a heating means (claim 4). Further, in the above reproducible recording paper, the heat-modified material is a homopolymer of at least a fluorine-containing acrylate or methacrylate monomer or a copolymer with another monomer (claim 5).

[0005]

When recording is performed on the recording surface of the reproducible recording paper of the present invention, which is made of a heat-denaturing material, with an electrophotographic recording device or a thermal transfer recording device, recording is performed with the same adhesiveness as plain paper. be able to. In addition, when the recording surface is contacted with the heat pressurizing means or the heating means after recording, the heat-denaturing material weakens the adhesiveness with the resin, so that the recording material is easily peeled from the recording surface. As a result, the recording material is removed from the recording surface, and the recording paper can be reused. Further, by providing a region where the heat-denaturing material is not applied or impregnated in a part or all of the leading edge margin of the recording paper or the side edge margin portion of the recording paper, there is a problem of slippage between the recording paper and the transport roller due to the area. Therefore, the recording paper can be smoothly conveyed in the recording apparatus.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional configuration diagram of a reproducible recording paper showing an embodiment of the present invention. FIG.
This is an example in which the heat-denaturing material 2 whose adhesion to the resin is weakened when heated is formed into a layer. In addition, the recording paper 1'of FIG.
Is an example in which the heat-denaturing material 2 is impregnated into the recording paper 1 so as to cover the surface of the pulp fiber 1a of the recording paper 1. still,
In the figure (a), since the heat-denaturing material 2 is formed in layers, the surface is smooth, but the figure (b) shows the pulp fiber 1a.
Since it covers only the surface, there are irregularities on the surface. As the heat-modified material 2 whose adhesion to the resin becomes weak when heated, for example, a fluorine-containing acrylate material is used. The present inventors have discovered that this fluorine-containing acrylate material rapidly weakens the adhesive force on the surface of the material when heated to 80 ° C. or higher. By utilizing this property, the recording agent adhered on the recording paper 1 is recorded. The (toner) can be easily peeled off under heating at 80 ° C. or higher. Further, as the material that can be used as the heat-modified material 2, in addition to the above-mentioned fluorine-containing acrylate material, a polymer of a fluorine-containing methacrylate monomer, a copolymer of these monomers (a homopolymer of a methacrylate monomer), and the like. A vinyl-based monomer copolymer (copolymer with another monomer) is preferable. As a method for producing the reproducible recording paper having the configuration of FIG. 1, a method in which a liquid in which the heat denaturing material 2 is dispersed or dissolved is applied to the recording paper or impregnated in the recording paper is preferable. When the value is high, a liquid in which the heat-denaturing material 2 is dispersed or dissolved is applied to the recording paper 1 to form a layered film, as in the embodiment of FIG. When the solid content concentration of the heat-denaturing material 2 is low, the heat-denaturing material 2 is impregnated into the entire recording paper 1 and dried as it is, as in the embodiment of FIG. After impregnation, the paper is blown to form.

Generally, in an electrophotographic recording apparatus, the toner transferred onto the recording paper is finally applied with heat and pressure by a fixing device to fix the toner onto the recording paper. When the reproducible recording paper of the example is applied, the heat-denaturing material 2 is formed so that the adhesion to the resin is weakened by heating. Therefore, even if an attempt is made to fix the toner by applying heat pressure, the toner adheres to the recording paper. It gets harder. Therefore, one method of solving this problem is to apply only pressure without heating as a fixing method of the fixing device. In this case, the toner is deformed and comes into close contact with the recording paper even with only pressure. Further, as shown in FIG. 2, after the heat pressure is applied, the pressure member 3 is cooled and the pressure member is separated. The roller 4 is separated. In this way, if the heat-denaturing material 2 has a strong adhesive force by cooling after applying the heat pressure, even if the pressure member (fixing roller 4) and the recording paper 1 are peeled off, the toner (recording agent) 9 Adheres to the recording paper 1 side. Further, it is more effective if the surface of the pressure member (the pressure roller 3 and the fixing roller 4) of the fixing device is a surface having extremely high releasability from the toner.

Further, another method of solving the above problem is to make the surface of the recording paper 1 easily adhere to the toner due to the mechanical anchor effect, and as shown in FIG. If unevenness is formed on the material 6, the toner is likely to enter the concave portion and the adhesive force is obtained. However, if the adhesion is too strong, it becomes difficult to separate the toner when reproducing the recording paper 1. Therefore, the toner is fixed during recording, and the toner is easily separated during reproduction, so that the toner has an appropriate unevenness. You have to choose. When this method is adopted, in the case of FIG. 1A, the recording surface 2a of the heat-denaturing material 2 is roughened. Further, in the case of FIG. 3B, since the surface has irregularities formed by the mesh of fibers, it is used, but if the mesh is rough, the adhesion between the toner and the recording paper is too strong, so the mesh Roughness must be selected appropriately. Incidentally, the recording paper 1 used in this method
Is suitable for recording paper with a strong calendar such as thermal transfer paper.

When a recording paper on which the heat-denaturing material of the present invention is formed is used in an electrophotographic recording apparatus or a thermal transfer recording apparatus, if the heat-denaturing material is formed on the entire surface, the paper feed roller and the recording paper of the recording apparatus are separated. It may become slippery, and print defects may occur due to jams and misalignment of the recording paper. Therefore, the inventors of the present invention evaluated the recording paper in which a region not formed with the heat-denaturing material was formed in a part of the paper, and as a result, as shown in FIG.
As shown in, when a region not formed by the heat-denaturing material is formed at the leading end of the recording paper or the side end of the recording paper in the direction parallel to the moving direction, slippage between the recording paper and the paper feed roller is caused by the region. It was found that the problem could be solved and the recording paper could be fed smoothly. Therefore, in the present invention, the blank area of the recording paper is an area not formed by the heat-denaturing material. The area (margin) not formed by the heat-denatured material is shown in FIGS.
As shown in, even a part of the leading edge of the recording paper is effective. Further, in the case where a region (margin) which is not formed of the heat-denaturing material is formed on the side edge portion of the recording paper, only one side of the recording paper may be used as shown in FIG. 5C. It is suitable that the width (W) of the region (margin) not formed by the heat-denaturing material is approximately 5 mm to 10 mm. Further, in the case of the side edge portion of the recording paper, the length (L) thereof needs to be the length of the paper.

Next, a reproducing method for reusing the recording paper 1 after recording (transferring a toner image or adhering ink) will be described. As shown in FIG. 6, the reproducing apparatus is composed of a peeling roller 7 which is a recording material (toner or ink) peeling member and a pressure roller 8 with a heater which is a heat pressing means, and the surface of the peeling roller 7 is It is better to be formed by an adhesive material. It is more desirable that this adhesive material has a property that the adhesiveness is increased by heating and the adhesiveness is weakened at room temperature. For example, a vinyl chloride polymer, an acrylic polymer, or an ethylene vinyl acetate polymer is desirable.
It is not necessary to apply strong pressure when using this material.
Further, since the toner for the electrophotographic recording device and the ink for thermal transfer recording are softened by heating, as another example of the recording agent peeling member, a member which the recording agent is likely to adhere to by heating or pressure contact is preferable. For example, aluminum and its alloys, brass and other metals, and resins such as polyethylene and polypropylene are preferable. In the case of this resin, peelability is better when a strong pressure is applied. Further, as shown in the figure, it is better to provide a cleaner 10 for removing the recording material 9 attached to the peeling roller 7. Alternatively, as shown in FIG. 7, when the recording agent peeling member (peeling roller 7) is a metal, a rolling roller 11 is provided, and the recording agent 9 is rolled on the peeling roller 7 with the recording agent 9 still attached. However, it may be flattened. In any of the examples of FIG. 6 and FIG.
It is desirable to heat the recording paper.

Next, concrete examples using the above-mentioned various materials will be described. [Example 1] Fluorine-containing acrylate copolymer material (Tex Guard manufactured by Daikin Industries) as a heat-modifying material whose adhesion to a resin is weakened by heating, thermal transfer paper (Ricoh plain paper type) on recording paper, and electronic as a recording device. Using a photographic recording device (Ricoh PPC5530), the recording paper was impregnated with a solution prepared by diluting the heat-modified material to 1 wt% with CFC-113, and then dried at 120 ° C. for 30 minutes to give a reproducible recording paper. It was made. Then, as a method for removing the toner after recording, by placing a reproducible recording paper on a plate heated to 130 ° C., pressing a commercially available aluminum foil against the recording surface, and then removing the aluminum foil in a heated state,
The toner was peeled off. As a result of this experiment, the image quality similar to that of ordinary recording paper was obtained by the electrophotographic recording apparatus, and good toner adhesion was achieved. Further, the toner could not be removed even if the recording portion was rubbed with an eraser. Next, when the recording paper was regenerated by the above peeling method, all the toner was peeled off from the recording paper. This operation was repeated 5 times, but good results were obtained, and the performance was not inferior.

[Embodiment 2] A fluorine-containing methacrylate copolymer material (Osaka Organic 17FM monomer) is used as a heat-modifying material whose adhesion to a resin is weakened by heating, a recording paper is a thermal transfer paper (Ricoh plain paper type), a recording device. As an electrophotographic recording device (Ricoh PPC5530),
The recording paper was impregnated with a solution prepared by diluting the above heat-modified material to 1 wt% with CFC-113, and then dried at 120 ° C. for 30 minutes to produce a reproducible recording paper. As a method for removing the toner after recording, the recording paper is placed on a plate heated to 130 ° C., a commercially available vinyl tape is pressed against the recording surface, and the vinyl tape is removed in a heated state to remove the toner. did. As a result of this experiment, the image quality similar to that of ordinary recording paper was obtained by the electrophotographic recording apparatus, and good toner adhesion was achieved. Further, the toner could not be removed even if the recording portion was rubbed with an eraser. Next, when the recording paper was regenerated by the above peeling method, all the toner was peeled off from the recording paper. This operation was repeated 5 times, but good results were obtained, and the performance was not inferior.

[Embodiment 3] A fluorine-containing methacrylate copolymer material (Osaka Organic 17FM Monomer) is used as a heat-modifying material whose adhesiveness to a resin is weakened by heating, thermal transfer paper (Ricoh plain paper type), recording device. Using a thermal transfer printer (Ricoh), the recording paper is impregnated with a solution prepared by diluting the heat-denaturing material to 1 wt% with CFC-113, and then dried at 120 ° C. for 30 minutes to produce a reproducible recording paper. did. Then, as a method of peeling off the ink after recording, the recording paper is placed on a plate heated to 130 ° C., a roller coated with a commercially available ethylene vinyl acetate copolymer (EVA Sumitomo Chemical) is pressed against the recording surface, The ink was peeled off by removing the roller in a heated state.
As a result of this experiment, an image quality similar to that of ordinary recording paper was obtained by the thermal transfer printer, and good ink adhesion was performed.
Writing with a pencil was also good. Next, when the recording paper was regenerated by the above peeling method, all the ink was peeled off from the recording paper. This operation was repeated 5 times, but good results were obtained, and the performance was not inferior.

[Example 4] A fluorine-containing acrylate copolymer material (Tex Guard manufactured by Daikin Industries) as a heat-modifying material whose adhesion to a resin is weakened by heating, thermal transfer paper (Ricoh plain paper type), recording paper An electrophotographic recording device (Ricoh PPC5530) is used as the device, and the margin of the recording paper is 10 mm at the leading end and 5 m at both ends.
m, a mask was applied to this area, and a solution obtained by diluting the above heat-denaturing material with CFC-113 to 1 wt% was applied to the above-mentioned recording paper by spray coating.
A reproducible recording paper was prepared by drying for 0 minutes. Then, as a method for removing the toner after recording, a reproducible recording paper is placed on a plate heated to 130 ° C., a commercially available aluminum foil is pressed against the recording surface, and the aluminum foil is removed in a heated state. Was peeled off. As a result of this experiment, the image quality similar to that of ordinary recording paper was obtained by the electrophotographic recording apparatus, and good toner adhesion was achieved. At this time, no jam occurred. Next, when the recording paper was regenerated by the above peeling method, all the toner was peeled off from the recording paper. This operation was repeated 5 times, but good results were obtained, and the performance was not inferior.

[Embodiment 5] A fluorine-containing acrylate copolymer material (Osaka Organic 17F monomer) is used as a heat-modifying material whose adhesion to a resin is weakened by heating, recording paper is heat transfer paper (Ricoh plain paper type), recording device. Each of the thermal transfer printers (Ricoh) was used as the recording paper, and the margin of the recording paper was set to 5 mm only at one side edge, and a mask was applied to this area.
A solution diluted to 1 wt% was applied to the above recording paper and then dried at 120 ° C. for 30 minutes to prepare a reproducible recording paper. Then, as a method of peeling the ink after recording,
The recording paper is placed on a plate heated to 30 ° C, and a roller coated with a commercially available ethylene vinyl acetate copolymer (EVA Sumitomo Chemical Co., Ltd.) is pressed against the recording surface, and the roller is removed in a heated state to remove the ink. Peeled off. As a result of this experiment, an image quality similar to that of ordinary recording paper was obtained by the thermal transfer printer, and good ink adhesion was performed. At this time, the paper conveying roller of the printer and the paper did not slip, and the printing was not disturbed. Next, when the recording paper was regenerated by the above peeling method, all the ink was peeled off from the recording paper. This operation was repeated 5 times, but good results were obtained, and the performance was not inferior.

Next, a comparative example for comparison with the above-mentioned example will be shown. [Comparative Example 1] A silicone mold release agent (Toray Silicone 20
0), thermal transfer paper (Ricoh plain paper type) as recording paper, and electrophotographic recording device (Ricoh PPC553 as recording device).
0) was used to spray-coat the above materials on recording paper and dried at 120 ° C. for 30 minutes to prepare a reproducible recording paper. Then, as a method of removing the toner after recording,
The recording paper was placed on a plate heated to 130 ° C., a commercially available aluminum foil was pressed against the recording surface, and the aluminum foil was removed in a heated state to remove the toner. As a result of this experiment, the image quality similar to that of ordinary recording paper was obtained by the electrophotographic recording apparatus, and good toner adhesion was achieved. Next, when the recording paper was regenerated by the above peeling method,
The toner was hardly peeled off from the recording paper. Therefore,
It could not be used as recycled paper.

[Comparative Example 2] A silicone release sheet (SYL-) is used as a material whose adhesiveness to a resin does not change even when heated.
OFF7600, Dow Corning), thermal transfer paper (Ricoh plain paper type) as recording paper, and electrophotographic recording device (Ricoh PPC5530) as recording device.
As a method for removing the toner after recording, the recording paper is placed on a plate heated to 130 ° C., a commercially available aluminum foil is pressed against the recording surface, and the aluminum foil is removed in a heated state to remove the toner. . As a result of this experiment, recording was performed by an electrophotographic recording device, but the toner was not attached to the silicone portion at all, and printing could not be performed.

[0018]

As described above, in the reproducible recording paper according to claim 1, the recording paper is coated with or impregnated with a heat-denaturing material whose adhesion to the resin is weakened by heating. Since it has a recording surface that is formed by, the recording agent has good adhesion to the recording sheet and cannot be removed even when the recording agent is rubbed with an eraser during recording (as with plain paper). Excellent in writing property, good writing with a pencil or the like, and the recording material can be easily removed from the recording paper by a reproducing device.

Further, in the reproducible recording paper according to claim 2, by providing a region where the heat-denaturing material is not applied or impregnated in a part or all of the leading end margin of the recording paper or the side end margin of the recording paper. The area can solve the problem of slippage between the recording paper and the conveying roller, the recording paper can be smoothly conveyed in the recording apparatus, and printing defects and jams can be significantly reduced.

Further, in the reproducible recording paper according to claim 3 or 4, after recording an image with a recording agent on the recording surface by an electrophotographic or thermal transfer recording device, at the time of reproduction, a heat pressurizing means, or Since the recording material is removed by bringing the heating means into contact with it, the recording material can be removed from the recording paper by a simple method, and the recording paper can be reused.

Further, in the reproducible recording paper of claim 5, since a homopolymer of a fluorine-containing acrylate or methacrylate monomer or a copolymer with another monomer is used as the heat-modifying material, when the recording agent is peeled ( At the time of heating), a remarkable peeling effect of the recording material on the recording paper can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram of a reproducible recording paper showing an embodiment of the present invention, (a) is an example in which a heat denaturing material is formed in layers on the surface of the recording paper, and (b) is a recording paper. In this example, a recording paper is impregnated with a heat-modified material so as to cover the surface of the pulp fiber.

FIG. 2 is a configuration diagram showing a fixing device when the reproducible recording paper of the present invention is used in an electrophotographic recording device.

FIG. 3 is a cross-sectional configuration diagram showing a reproducible recording paper for enhancing the adhesion of toner.

FIG. 4 is an explanatory diagram of a region (a blank portion) that is not formed of a heat-denaturing material on the recording paper.

FIG. 5 is a diagram showing an example of forming a region (margin part) of the recording paper which is not formed by a heat-denaturing material, wherein (a) and (b) are examples in which a margin part is formed at a part of the front end of the recording paper. , (C) are examples in which a margin is formed only on one side of the side edge of the recording paper.

FIG. 6 is a configuration diagram showing a reproducing device provided with a cleaner.

FIG. 7 is an explanatory diagram showing a reproducing device provided with a rolling roller.

FIG. 8 is a sectional view showing a conventional reproducible recording paper in which a release member is formed on the recording paper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Recording paper 2 ... Thermally denatured material 2a ... Recording surface 7 ... Peeling roller 8 ... Thermal pressing means 9 ... Recording agent

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideki Tomono 1-3-6 Nakamagome, Ota-ku, Tokyo, Ricoh Co., Ltd.

Claims (5)

[Claims] 1. A reproducible recording paper having a recording surface formed by coating or impregnating a recording paper with a heat-denaturing material whose adhesion to a resin is weakened by heating. 2. The heat-denaturing material, except for a part or all of a leading edge margin of the recording paper or a side edge margin portion of the recording paper,
The reproducible recording paper according to claim 1, which is applied on the recording paper or impregnated in the recording paper. 3. A recording material is recorded on the recording surface by an electrophotographic or thermal transfer recording device, and then a recording material is removed by contacting a heat pressurizing means during reproduction. A reproducible recording paper according to items 1 and 2. 4. The recording medium is recorded on the recording surface by an electrophotographic or thermal transfer recording device, and then the recording medium is removed by contacting a heating means during reproduction. , 2 reproducible recording paper. 5. The reproducible recording paper according to claim 1, wherein the heat-modified material is a homopolymer of at least a fluorine-containing acrylate or methacrylate monomer or a copolymer with another monomer.