JPS62101484A - Correction of misrecord in thermal transfer recording - Google Patents

Abstract

PURPOSE:To simplify a correcting operation and enable a misprint to be corrected while using the same thermal transfer material as that used for recording, by releasing a thermal transfer material from a recording medium in a specified temperature range. CONSTITUTION:When correcting a misrecord, a thermal transfer material is released from a recording medium in a temperature range in which the adhesive force between a base of the transfer material and a thermally transferrable ink layer and the cohesive force of an ink of the ink layer are greater than the adhesive force between the ink layer and the recording medium. A releasing member 25 is so disposed as to prolong the period of time from the moment the thermal transfer material is welded to a misrecorded image by applying heat by a thermal head 22 to the moment the transfer material is released from the recording medium 24 in the case of correcting the misrecorded image. By this, the temperature of the ink layer and the misrecorded image are lowered, and the transfer material is released from the recording medium in the above-mentioned correcting region, whereby the misrecorded image can be corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for correcting erroneous recording in thermal transfer recording, which involves recovering erroneously recorded images on a thermal transfer material used for thermal transfer recording.

[Conventional technology]

In recent years, with the rapid development of the information industry, various information processing systems have been developed, and recording methods and devices suitable for each information processing system have also been developed and adopted. One such recording method is the thermal recording method.
The equipment used is lightweight, compact, noiseless, and has excellent operability and maintainability, so it has been widely used recently.

However, among the recording papers used in thermal recording methods, ordinary thermal recording paper is a color-forming processed paper containing a color former and a color developer, so it is expensive, and records can be tampered with. The paper has disadvantages such as poor storage stability, such as color development of the paper easily by heat or organic solvents, and discoloration of the recorded image in a relatively short period of time.

A thermal transfer recording method has recently been attracting particular attention as a method that maintains the advantages of the above-mentioned thermal recording method and compensates for the drawbacks associated with the use of thermal recording paper.

This heat-sensitive transfer recording method generally uses a heat-sensitive transfer material having a heat-transferable ink layer formed by dispersing a coloring material in a heat-melting binder, for example, on a sheet-like support.
This thermal transfer material is superimposed on a recording medium so that its thermal transferable ink layer is in contact with the recording medium, and heat is supplied from the support side of the thermal transfer material to a thermal head to thermally transfer the melted ink layer onto the recording medium. By doing so, a transferred recorded image (print) is formed on the recording medium according to the heat supply shape (arm turn). According to this method, the above-mentioned advantages of the thermal recording method can be maintained, plain paper can be used as a recording medium, and the above-described disadvantages associated with the use of thermal recording paper can also be eliminated.

However, even in a thermal transfer recording method having such excellent characteristics, there are still some points that require improvement. One of them is that the transferred recorded image obtained by thermal transfer recording, even if it is due to printing error,
This means that it cannot be easily erased.

As a general means of correcting misprinting, it is possible to use a paint with 9-hidden properties, which has become widely used in recent years. However, the use of such a paint naturally requires a coating operation, and depending on the situation, the coating operation may not be appropriate. In particular, depending on the situation of thermal transfer recording, it may be desirable to correct printing errors immediately on the transfer recording device after they are discovered, but it is not appropriate to perform the above-mentioned paint application work on the transfer recording device. .

Furthermore, a method has already been proposed in which a thermal transfer material having a thermal transferable ink layer containing an obscuring colorant having the same color h as that of the recording medium is used, and the erroneously printed portion is covered with this transfer ink layer. By using this method, it is possible to immediately correct printing errors on the transfer recording device after discovering them, but if the colors of the recording medium and the opaque coloring material are not completely the same, and the ink layer is When the repaired portion is raised by the covering, it becomes easy to distinguish the repaired portion, which is not desirable in terms of appearance.

In addition, as a correction method that does not cause such inconvenience, it is possible to use a non-penetrating thermal transferable ink layer on the recording medium, that is, to prevent the print from excessively penetrating the recording medium such as paper. A method has been considered in which the erroneously printed portion is easily peeled off from the recording medium by forming it in the form of a film.

In this method, in order to remove the erroneously recorded portion from the recording medium, the erroneously recorded portion is removed from the recording medium by using an eraser, or by adhering the erroneously printed character to a pressure-sensitive adhesive tape or adhesive tape. However, correction using an eraser is complicated in operation and difficult to correct on a small recording device. In addition, corrections using pressure-sensitive adhesive tape or adhesive tape can be made on the recording device, but depending on the installation environment of the recording device (external factors such as temperature and humidity), the cohesive force of the adhesive of the adhesive tape may be affected. Because of this, when the adhesive tape is peeled off from the recording medium, the adhesive may remain on the recording medium along with the erroneous prints, making it impossible to correct them. Therefore, if the recording medium is paper, the surface may be destroyed. Furthermore, when adhering the adhesive tape to the incorrectly printed area, it is necessary to apply a large amount of pressure, so it is necessary to provide a pressure head, a pressure roll, etc. in addition to the thermal head, and the recording device becomes large and complicated. I don't like it.

In addition, when making corrections using heat-sensitive adhesive tape, it is possible to adhere to erroneously recorded images by applying heat with a thermal head, but in reality, a heat-sensitive adhesive tape for correction is incorporated into the recording device in addition to the heat-sensitive transfer material. This is an obstacle to miniaturization and quantification of recording devices.

[Problems to be solved by the invention]

The present invention has been made to solve the above-mentioned conventional problems and to provide a method for correcting erroneous recording in thermal transfer recording, which can efficiently recover erroneously recorded images using a thermal transfer material used for thermal transfer recording. It is.

The present invention has also been made to provide a method for correcting erroneous recordings using thermal transfer recording, which allows corrections to be made without causing damage to the recording medium or causing inconvenience to the appearance of the recording medium due to difficulty in identifying the corrected portion. It is.

The present invention has also been made to provide a method for correcting erroneous recording by thermal transfer recording, in which the correction mechanism is not complicated and the thermal transfer recording apparatus can be simplified.

[Means for solving problems]

That is, the method for correcting erroneous recordings in thermal transfer recording provided by the present invention corrects transfer recordings that are erroneously formed on a recording medium during thermal transfer recording using a thermal transfer material having a thermally transferable ink layer on a support. In a method for correcting recording errors in thermal transfer recording in which an image is recovered by thermally adhering it to the same thermal transfer ink layer used for recording, the thermal transfer ink layer used for recovery is provided with a lower thermal energy than during recording. After the thermal adhesion is applied to the erroneously recorded image, the adhesive force between the support of the thermal transfer material and the thermal transferable ink layer and the cohesive force of the ink in the thermal transferable ink layer cause the adhesion between the thermal transferable ink layer and the recording medium. This method is characterized in that erroneously recorded images are recovered by peeling the thermal transfer material from the recording medium in a temperature range in which the force and the resistance become large.

[Specific explanation of the structure and effects of the invention]

In the present invention, since the physical properties of the thermal transfer ink layer when used for recording and the physical properties when used for correction are changed, thermal transfer recording and error recording correction can be performed using the same thermal transfer ink One of its characteristics is that it uses layers. Here, the physical properties include the adhesive strength between the support of the heat-sensitive transfer material and the heat-transferable ink layer (hereinafter referred to as F□);
The cohesive force of the ink in the thermal transfer ink layer (hereinafter referred to as F) and the adhesive force between the thermal transfer ink layer and the recording medium (hereinafter referred to as F)
Correction is possible by utilizing changes in these physical properties between thermal transfer recording and correction of erroneous recording. That is, during thermal transfer recording, thermal transfer is possible when F becomes relatively higher than F and Fl, but when correcting erroneous recording, F and F become higher than F. By making the amount relatively high, it becomes possible to accurately recover erroneously recorded images without causing damage or contamination to the recording medium or cohesive failure within the ink layer.

This can be illustrated graphically as shown in Figure 1. 1st
In the figure, F, , F, and F have the above-mentioned meanings, and F4
indicates the adhesive force between the thermal transfer ink layer used for correction and the erroneously recorded image.

When thermal energy is applied to the thermal transferable ink layer, the thermal transferable ink layer exhibits adhesive strength (point a), and the adhesive strength F with the recording medium gradually increases, and the adhesion between the support and the thermal transferable ink layer increases. From point f (temperature A) at which the force F1 is exceeded, it becomes possible to adhere to the recording medium. The adhesive force increases as the temperature rises, and when the temperature reaches the point at which the maximum applied energy is reached (point b), F3 increases as the cohesive force of the thermal transfer ink increases, and reaches its maximum at room temperature. The behavior of F□, F, which shows a value upon heat application and cooling, generally shows reversibility. F4 is the adhesive force between the thermal transfer ink layer and the erroneously recorded image when correcting the erroneous recording. 6 points), the behavior is substantially the same as the cohesive force F2 of the ink. In the present invention, when recording,
The conditions for applying energy so that the thermal transfer ink reaches a specific temperature (point A) or higher in FIG. 1 and for peeling the thermal transfer material from the recording medium during recording are Fl < F.
The principle of maintaining the strength relationship x * Fm is F in Figure 1.
It is necessary to perform this in the region of f-+g. In addition, when recovering an erroneously recorded image, it is necessary to apply energy that allows the thermal transfer ink layer to thermally adhere to the erroneously recorded image. It is necessary to apply heat more than (point B). The conditions for peeling the thermal transfer material from the recording medium are as follows:
The strength relationship Fm<Fx-Fs can be maintained. F, g −
By performing this in the +c region, that is, below a specific temperature (6 points), it becomes possible to remove the recording medium from the recording medium to compensate for the erroneous recording.

In the present invention [In order to obtain a thermal transfer material according to the above-mentioned principle, the present inventors constructed a thermal transfer material used in the present invention, which has no measurable adhesive force and cohesive force, by the method described below. Selected materials.

The contact strength F1 between the support and the thermal transferable ink layer and the adhesive strength F between the recording medium and the thermal transferable ink layer are determined by measuring the peeling force between each layer under the following conditions using a measuring device: Shimadzu Autograph DC- 2000° ■Measurement sample manufactured by Takashi Seisakusho Width 25+w 180° peel strength Tensile speed 300 m/mln Measurement temperature 20°C to 100°C The cohesive force F of the thermal transferable ink layer was measured under the following conditions.

Measuring equipment: Shimadzu Autograph DC-2000゜ Measurement sample manufactured by Takafusa Manufacturing Co., Ltd. Thickness: 0.1 to 2 ■ Width: 25 ■ Gripping interval: 20 m Tensile speed: 300 m+/min Measuring temperature: 20 to 100°C Under the above measurement conditions, KFl, F, As a result of measuring F and F, in order to enable printing and correction using the same heat-sensitive transfer material according to the above principle diagram, it is particularly important to select a heat-melting material among the constituent elements of the heat-transferable ink layer. It turned out to be. In other words, heat-melting materials include polyamide resins, polyester resins, extremely high molecular weight epoxy resins, polyurethane resins, polyacrylic resins (for example, polymethyl methacrylate, polyacrylamide), and vinyls such as polyvinyl pyrrolidone. resin, polyvinyl chloride resin (e.g. vinyl chloride-based resin)
Vinylidene chloride copolymer, vinyl chloride-vinegar [hinyl copolymer]
fi compound (In), cellulose resin (e.g. Eva methyl cellulose, ethyl cellulose, Calgoxy methyl cellulose), polyvinyl k7A/coal resin (e.g. polyvinyl alcohol, partially saponified polyvinyl alcohol, etc.), petroleum resin, rosin-based conductor , coumaron-indene resin, terpene resin, nogalac type phenolic resin,
Polystyrene resin, polyolefin thread resin (e.g. polyethylene, polypropylene, polybutene, ethylene-
(vinyl acetate copolymer, etc.), polyvinyl needle thread resin,
It is preferable to use polyethylene glycol resin, elastomers, natural rubber, styrene-butadiene rubber, isozolene rubber, etc. as main materials, and materials with a high softening temperature and high melt viscosity are particularly preferable.

The softening temperature of the thermofusible material is 50 to 160°C, and even 6
The temperature is preferably in the range of 0 to 150°C. In addition, the melt viscosity at 150°C is 2 centipoise to 200,000 centipoise, and furthermore 10 centipoise to 150,000 centipoise (
(rotational viscometer) range. The softening temperature herein refers to the temperature at which the sample begins to flow using a Shimadzu flow tester model CFT-500 under the conditions of a load of 10 kIi, an increase in temperature, and a temperature rate of °C/min.

Based on such physical property conditions, one or more types of the above-mentioned wide range of heat-melting materials can be selected and used.

In the present invention, the thermally transferable ink layer containing such a heat-melting material can have a single layer structure, or can have a two or more layer structure. In addition to the heat-melting material, various additives such as 1, plasticizer, oil agent, etc. can be used in these thermal transfer ink layers, and at least 1.
Each ink layer contains a coloring material. (9) Waxes such as carnauba wax, paraffin wax, Sasol wax, microcrystalline wax, castor wax; stearic acid, lumitic acid, lauric acid, aluminum stearate; Lead stearate, barium stearate,
Higher fatty acids such as zinc stearate, zinc palmitate, methyl hydroxyl, tephrate, and glycerol monohydroxystearate, or derivatives such as their metal salts and esters can be used.

Colorants include carne black, nigrosine dye,
Lamp Black, Sudan Black SM, Alkaline Flu, First Yellow G, Pencil Shin Erocopigment
Yellow, India First Orange, Irgazine Red, Varanitroaniline Red, Toluidine Red, Carmine FB, Δ-Manent Bordeaux FRB,
Pigment Ole: yjiR, Lysol Red 20. Lake Red C, Rhodamine FB, Rhodamine B Lake, Methi A, -Bio L/T) B Lake, Phthalocyanine Blue, Pidamento Blue, Bridgent 0 Green B1 Phthalocyanine Green, Oil Yellow GG, Zapon Q Fast Yellow CGG, Kayasera) Y963
, Kayaset YG, Sumiplast Niro G, Zapon Fast Orange RR, Oil Scarlet, Sumiplast Orange G, Orazol 0 Brown B, Pomelo First Scarlet CG, Eisen Subiron Red, BEH.

Oil pink OP, Victoria blue F4R.

All of the various dyes and pigments used in the fields of printing and recording can be used, such as Fastgen Blue 5007, Sudan Blue, and Oil Peacock Blue. These colorants are typically heat-fusible materials such as 100! It can be used in a proportion of 3 to 450 parts by weight.

As for the material of the support used in the present invention, the adhesion between the support and the thermal transfer ink varies depending on the combination with the heat-melt material used, but basically the heat-melt material described above is used. Any known material that has been used conventionally can be used. Specifically, plastic films with relatively good heat resistance such as polyester, polycarbonate, triacetyl cellulose, aromatic polyamide, polyphenylene sulfide, polyimide, cellophane, parchment paper, etc. can be used. In addition, the thickness of the support is preferably about 1 to 15 microns when considering a thermal head as a heat source during thermal transfer, but for example, a heat source such as a laser beam that can selectively heat the thermal transferable ink layer There are no particular restrictions when using. In addition, when using a thermal head, the surface of the support that comes into contact with the thermal head may be made of silicone resin, fluororesin, polyimide resin, epoxy resin, phenolic resin, etc.
By providing a heat-resistant protective layer made of melamine resin, acrylic resin, nitrocellulose, etc., the heat resistance of the K support can be improved, or it is also possible to use support materials that could not be used conventionally.

The planar shape of the heat-sensitive transfer material used in the present invention is not particularly limited, but it is generally used in the shape of a typewriter or a wide tape used for line printers. Further, for color recording, it is also possible to use a thermal transfer material in which heat-melting ink of several tones is applied in stripes or blocks.

Further, the thermal transfer recording method using the thermal transfer material used in the present invention is not particularly different from a conventional method, and the recording medium made of plain paper or the like is laminated so as to be in contact with the thermal transferable ink layer of the thermal transfer material. Preferably, the desired recording A is made from the support side of the heat-sensitive transfer material using a thermal head or a laser beam.
? After applying heat in a pattern according to the turn, the heat-sensitive transfer material and the recording medium may be separated.

An example of a specific method and means for correcting erroneous recording in the present invention is shown in FIGS. 2(d) and 2(e). In FIG. 2, 21 is a thermal transfer material, 22 is a thermal head, 23 is a printed image, 24 is a recording medium, and 25 is a peeling member.

In FIG. 2(0), after the thermal transfer material receives heat from the thermal head 22, it is immediately peeled off from the recording medium 24, and is peeled off in the specific area described above, so that printing becomes possible. However, in the case of correcting the erroneous recording, as shown in FIG. By also providing a peeling member 25 in order to delay the time until peeling off from the medium, the temperature of the thermal transfer ink layer and the erroneously recorded image decreases, and the layer peels off within the corrected area as described in the FA theory. It becomes possible to correct erroneous records.

In addition, a peeling member is used to increase the time until the thermal transfer material is peeled from the recording medium at the hour of the hour, but the peeling member is configured to move in accordance with the drive of the thermal head. , attached to a fixed carriage or ribbon cassette with a thermal head. Further, since the peeling member conveys the ink ribbon, it is preferably formed of a roller-like material or a similar material with low frictional resistance. Furthermore, in order to increase the time required for peeling off, it is necessary to provide the thermal head at a position approximately 2 to 50 mm away from the thermal head. Specifically, when energizing and recording as shown in Fig. 2, as shown in Fig. 2 (0),
The peeling member 25 is not in contact with the recording medium. Therefore, since the ribbon is peeled off immediately after receiving heat from the thermal head, recording can be performed.

However, when making corrections (see Figure 2), the peeling member 25 moves so as to come into contact with the recording medium, and after receiving heat from the thermal head, it moves by the distance it takes to reach the peeling member. The peeling time will be delayed.

This makes it possible to correct printing errors as shown in FIG. 2(e).

Although FIG. 2 shows an example of delaying the time until peeling by using a peeling member, other methods and means that satisfy the conditions for peeling within the correction area shown in FIG. The present invention is not limited to the example shown in FIG. 2.

The present invention will be explained in more detail below with reference to specific examples. Hereinafter, "parts" represent "parts by weight."

Example 1 <Ink 1> (Solid content ratio) Ink 1 was prepared by thoroughly stirring and mixing each component of the above formulation to obtain a uniformly dispersed state. Ink 1 was applied onto a polyethylene tere-7 tallate film (hereinafter referred to as PET) having a thickness of 6 μm using an applicator so that the dry film thickness was 2 μm, and the film was dried at 70° C. to form a first ink layer.

Ink 2> (Solid content ratio) Ink 2 was prepared by thoroughly stirring and mixing each component of the above formulation.

Ink 2 is applied on the previously provided first ink layer, and 70
It was dried at .degree. C. to form a second ink layer with a dry film thickness of 2 to 3 .mu.m, thereby obtaining a thermal transfer material (I).

Thermal transfer recording was performed on the thus obtained thermal transfer material (I) under the following conditions.

As a result, prints with good extreme pressure clarity and good print density and quality were obtained. Next, by thermally adhering the thermal transfer material (I) to the erroneous printing under the following conditions and peeling it off from the recording medium, it became possible to erase the erroneous printing.

In addition, the softening temperature and melt viscosity of the ink layer in this example were as follows.

Softening temperature °C Melt viscosity (150 °C, 7Φ calendars) 1st ink layer 78 8200 2nd ink layer 89 15000
The A, B, and C values explained in Fig. 41 are A=102°C, B-75°C, and C=72°C, which satisfy the principle of the present invention.

<Proportional Example 1> After printing the thermal transfer material (I) obtained in Example 1 under Condition 1, an attempt was made to thermally adhere it under Condition 3 below and peel it off from the recording medium. The erroneous print could not be erased, but instead the thermal transfer ink layer was transferred.

〔Effect of the invention〕

According to the method of the present invention, it is difficult to distinguish the part to be corrected for erroneous printing in thermal transfer recording, the correction operation is simple and favorable in appearance, and the same thermal transfer material used for recording is used to correct erroneous printing. As a result, the width of the recording device can be simplified.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram for explaining the principle of the method of the present invention, and for explaining an example of a specific method and means for correcting curve misrecording, which schematically shows changes in the physical properties of a thermally transferable ink layer. . F-technique: Adhesive force between the support and the thermal transferable ink layer, F,
... '+ & adhesion of thermal transfer ink, F, ... Adhesion between recording medium and thermal transfer ink 1-, F4 ... Adhesion between thermal transfer ink layer and incorrectly recorded image, 21 ... Thermal transfer wood,
22... Thermal head, 23... Printing, 24... Recording medium, 25... Peeling member. Agent Patent Attorney Jo Taira Yamashita Figure 1 (C) Figure 2

Claims (1)

[Claims] During thermal transfer recording using a thermal transfer material having a thermal transferable ink layer on a support, the transferred recorded image that is mistakenly formed on the recording medium is thermally adhered to the same thermal transferable ink layer used for recording. In a method for correcting erroneous recordings in thermal transfer recording that is recovered by using a thermal transfer material, after applying lower thermal energy than during recording to the thermal transfer ink layer used for the recovery and thermally adhering it to the erroneously recorded image, Peeling the thermal transfer material from the recording medium within a temperature range in which the adhesive force between the body and the thermal transfer ink layer and the cohesive force of the ink in the thermal transfer ink layer are greater than the adhesive force between the thermal transfer ink layer and the recording medium. A method for correcting erroneous recording in thermal transfer recording, characterized by recovering an erroneously recorded image.