JPH0649393B2 - Correction material for thermal transfer recording and correction method using the same - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer recording correction material used in a thermal transfer recording apparatus such as a thermal typewriter or a thermal printer, and a correction method using the same.

2. Description of the Related Art Conventionally, thermal transfer recording methods have been widely used in various fields, and particularly, noise reduction, miniaturization, energy saving,
It is often used in the field of typewriters because it can be made lighter.

However, when a typewriter is used, some printing errors occur, and therefore it is required for the typewriter and the like to have a mechanism for correcting the printing error.

Impact type lift-off tapes and cover wrap tapes that have been conventionally used require a strong impact at the time of correction and therefore cannot be used at all in a thermal transfer recording method.

Under such circumstances, as a repairing material and a repairing method that can be used in the thermal transfer recording method, a repairing material coated with a white hot-melt ink is used, or a repairing material using an ink having an adhesive property only when heated is used. Then, it is proposed to correct it by superimposing it on the modified part.

Problems to be Solved by the Invention However, when the correction material actually coated with the white hot-melt ink is used for correction, a small heat value of the thermal head causes a thick layer of the hot-melt ink to be thickened. It is impossible to do so, so a single fix cannot completely fix it. In addition, when using a correction material that has adhesiveness only when heated, the melted ink will penetrate into the recording medium such as paper, so the ink at the repaired location must be completely removed. I can't.

Further, when the smoothness of the recording medium paper is low, for example, when the flatness is 50 seconds or less, the transfer efficiency of the thermal transfer recording medium is lowered due to the unevenness of the surface of the paper, which causes voids, The printing ink often penetrates into the inside of the paper, resulting in remarkably difficult correction.

It is an object of the present invention to provide an effective correction material for thermal transfer recording and a correction method for correction in the thermal transfer recording method.

Means for Solving the Problem In the correction of heat-sensitive transfer recording, the present inventor heat-melts a heat-sensitive transfer recording correction material composed of a specific material and a specific composition and a printed ink to be removed, and then, The present invention has been completed based on the finding that factors such as adhesiveness and cooling between each other cause a large difference in effect.

That is, the present invention comprises a heat-resistant base material and a correction medium layer provided thereon, and the correction medium layer contains polyolefin or its derivative and an acrylic resin. A correction material for thermal transfer recording, preferably, in addition to the above, to provide a correction material for thermal transfer recording in which a heat resistant protective layer is provided on a heat resistant substrate opposite to the surface on which the correction medium layer is provided. Is.

The present invention further provides a printing ink on a thermal transfer recording medium,
A thermal transfer recording method in which a thermal head is melted by heating, and the molten ink is peeled from the thermal transfer recording medium to print on the recording medium, wherein a heat-resistant substrate and , A correction medium layer provided thereon, the medium layer being overheated with a heat-sensitive transfer recording correction material containing polyolefin or its derivative and an acrylic resin, and the transferred transfer layer should be corrected. Melt the ink and the correction medium layer of the thermal transfer recording correction material to each other, and after cooling, the melt of the ink at the location to be corrected and the correction medium layer of the thermal transfer recording correction material,
After recovering sufficient adhesive strength to the thermal transfer recording correction material, the correction material for the thermal transfer recording medium and the recording medium are separated to peel off the repaired portion from the recording medium, and the correction for thermal transfer recording is performed. Provided is a method characterized by transferring to wood.

The heat-resistant base material for which the correction material for heat-sensitive transfer recording of the present invention can be used is, for example, thin paper such as glassine paper or condenser paper, or heat-resistant plastic film such as polyester, polyamide, nylon or polypropylene. Its thickness is preferably 20 [mu] or less, more preferably 10 [mu] or less, optimally 2 to 10 [mu].

The correction medium layer provided in the recording material for heat-sensitive transfer of the present invention contains polyolefin or a derivative thereof and an acrylic resin. Its thickness is preferably 1-8 μ. Further, the medium layer may contain a small amount of wax or a softening agent for the purpose of sensitivity adjustment and the like.

The above-mentioned polyolefin or its derivative has a melting point or softening point of 55 to 160 ° C and a penetration of 20 or less (25
℃), melt viscosity is 100 to 10,000 cps (140
Those having physical properties of (° C.) are preferable. In particular, as the polyolefin or its derivative, 5 to 4 of oxidation type low molecular weight polyethylene and vinyl acetate having an acid value of 5 to 30 are used.
0 wt% copolymerized low molecular weight polyethylene, 5 to 15 wt% of an organic acid (eg acrylic acid) copolymerized low molecular weight polyethylene or emulsions and / or dispersions thereof. preferable.

As the acrylic resin, homopolymers such as acrylic acid, acrylic acid ester, acrylamide, acrylonitrile, methacrylic acid, and methacrylic acid ester are preferably copolymers.

The dry weight of the components constituting the correction medium layer provided in the recording material for heat-sensitive transfer of the present invention is preferably 10 to 7 by weight of polyolefin or its derivative.
0%, acrylic resin 10-70%,
The wax is in the range of 10% or less and the filler is in the range of 2 to 30%.

The heat-resistant protective layer that can be provided in the recording material for heat-sensitive transfer of the present invention is provided to prevent sticking of the heat-resistant substrate by increasing the output of the thermal head. For this purpose, higher fatty acid, fluorine resin or silicone resin is used. Its thickness is preferably 1 μm or less. Further, this layer can contain additives such as various plasticizers, if necessary.

Examples of the softening agent that can be used in the heat-resistant protective layer and the correcting medium layer of the present invention include various animal and vegetable oils and mineral oils. A filler can be used to improve mechanical properties and the like. For example, extender pigments such as calcium carbonate and silica can be used.

The thermal transfer recording correction material of the present invention can be manufactured, for example, as follows.

First, the above-mentioned polyolefin or its derivative, acrylic resin or the like is dispersed or melt-dispersed in a solvent to prepare a correcting medium agent. When using emulsion or dispersion, emulsion or emulsion of polyolefin or its derivative, wax emulsion, and acrylic resin are dispersed in water with a disperser such as a ball mill or an attritor to prepare a correction medium. be able to. This correction medium agent is applied to a heat-resistant substrate by an ordinary hot melt type or solvent type coating machine, and solidified or dried.
When the heat-resistant protective layer is provided on the opposite surface of the substrate, the above-mentioned materials may be mixed and dispersed in a solvent, coated and dried.

The correction material for heat-sensitive transfer recording of the present invention can be applied to the correction work in heat-sensitive transfer recording using a general heat-sensitive transfer recording medium, and in particular, it has an ink layer containing a component used in the correction medium as a main component. It can be applied more preferably in correction work in thermal transfer recording. An example of such a thermal transfer recording medium is shown below.

Consisting of a heat resistant base material and an ink layer provided thereon,
The ink layer is a heat-sensitive transfer recording medium containing a polyolefin or a derivative thereof, an acrylic resin, and a colorant, and more preferably, a heat-resistant protective layer and / or a heat-resistant protective layer on the heat-resistant substrate on the side opposite to the ink layer. Alternatively, the thermal transfer recording medium is provided with a release layer between the ink layer and the heat resistant substrate.

As the heat-resistant base material constituting this heat-sensitive transfer recording medium, the same heat-resistant base material as the heat-sensitive transfer recording correction material of the present invention can be used. Further, the heat-resistant protective layer of the heat-sensitive transfer recording medium, and the polyolefin or its derivative of the ink layer, the acrylic resin, etc. are also used as the heat-resistant protective layer of the heat-sensitive transfer recording correction material of the present invention, and the polyolefin or the derivative thereof of the correction medium layer. , Acrylic resin, etc. can be used respectively.

The release layer that can be provided on this thermal transfer recording medium is
It is for facilitating the transfer of the ink layer at the time of heating, and various waxes such as paraffin wax, micro wax, carbanawa wax and montan wax can be used. The thickness is preferably 1 to 4 μ.
This layer can contain various conventional additives such as softeners.

The colorant for the ink layer of the heat-sensitive transfer recording medium is, for example, various pigments such as carbon black, iron oxide, dark blue, lake red and titanium oxide, and basic base dye and neozapon dye.

Next, an example of manufacturing the above thermal transfer recording medium will be described.

When a release layer is provided, the wax described above and, if necessary, various additives mixed or dispersed are applied to a heat resistant substrate by a hot melt coating method or a solvent coating method, and the release is performed by drying. Form the layers. Then, the ink is prepared in the same manner as the correction medium except that the coloring material is added, and the ink is applied onto the release layer and dried to form the same. When the heat-resistant protective layer is provided, the above-mentioned materials may be mixed and dispersed in a solvent, coated and dried, and when the release layer is not provided, the step may be omitted.

Next, a correction method using the thermal transfer recording correction material of the present invention will be described.

First, a correction agent for heat-sensitive transfer is superposed on a portion to be corrected on a recording medium and heated by a thermal head, so that the transferred ink to be corrected and the correction medium layer of the correction material for heat-sensitive transfer recording are mutually separated. Melt. After cooling, the melt recovers sufficient adhesive force to the thermal transfer recording correction material, and then the thermal transfer recording correction material and the recording medium are separated from each other to peel off the corrected portion from the recording medium. , Transfer to correction material for thermal transfer recording and make correction. The relative surface area relationship between the ink at the correction point and the correction medium is ultimately determined by whether or not the above-mentioned adhesive force is recovered after cooling the melt, but in general, For this purpose, a correction medium having substantially the same surface area as that of the ink at the correction portion is superposed and heated and melted. The cooling is preferably cooling to a temperature below the melting point or softening point of the melt. Further, the recording medium and the thermal transfer recording correction material are preferably separated at a steep angle. This is for facilitating the transfer of the ink at the repaired portion to the repairing medium layer. The angle depends on the nature of the recording medium, the mechanism of the typewriter, the nature of the ink, etc.
Although it varies, it is preferable to separate at a large angle as long as these conditions allow. The important point is to melt the ink at the location to be corrected and the correction medium and cool them, that is, to separate them after sufficiently recovering the above-mentioned adhesive force. If you pull it apart at other times, you can't expect a complete fix.

The thermal transfer recording correction material of the present invention and the correction method using the same will be described with reference to the following examples. The evaluation was performed visually.

Example 1 A 4 μm thick PET (polyethylene terephthalate) as a heat resistant substrate was coated with a silicone resin as a heat resistant protective layer on one side to a thickness of 0.5 μm. Using a thermal recording medium in which the printing ink consisting of the following components is applied in layers on the other side of the heat-resistant substrate, it is printed on the paper usually used for thermal recording with a general thermal typewriter. did.

This printed part is used as a heat resistant base material with a thickness of 4 μm.
Thermal transfer recording in which ET (polyethylene terephthalate) was coated on one side with a silicone resin to a thickness of 0.5 μ to form a heat-resistant protective layer, and the other side was formed with a correction medium layer consisting of the components shown below. The correction material was used to make corrections using the thermal typewriter. As a result, it was possible to completely remove the ink at the corrected portion with one correction.

Comparative Example 1 Printing and correction were carried out in the same manner as in Example 1 except that the printing ink and the correction medium of Example 1 were replaced with the components shown below. It was impossible to remove the ink.

Example 2 Printing and correction were performed in the same manner as in Example 1 except that the plain paper used in Example 1 was replaced with a paper having a smoothness of 8 seconds. As a result, it was possible to remove the ink at the location to be completely corrected by one correction.

Comparative Example 2 Printing and correction were performed in the same manner as in Example 2 except that the thermal transfer recording correction material used in Comparative Example 1 was used. As a result, it was impossible to completely fix it with a single modification.

EFFECTS OF THE INVENTION When the correction material for heat-sensitive transfer recording and the correction method using the same of the present invention are used for correction in heat-sensitive transfer recording, not only plain paper but also a recording medium such as paper having poor smoothness is printed. The part can be removed with a single modification. Also,
By using the correction material of the present invention, it is possible to perform the correction without causing the ink printed at the time of the correction to penetrate into the recording medium.

Claims (5)

[Claims] 1. A printing ink on a heat-sensitive transfer recording medium is melted by heating a thermal head, and the melted ink is peeled off from the heat-sensitive transfer recording medium. A thermal transfer recording correction material comprising a heat-resistant substrate and a correction medium layer provided thereon is superposed and heated, and the transferred ink to be corrected and the thermal transfer recording correction material correction medium layer. After melting each other and then cooling, the melted material between the ink at the location to be corrected and the correction medium layer of the thermal transfer recording correction material restores sufficient adhesive force to the thermal transfer recording correction material. In addition, the above-mentioned correction for thermal transfer recording used in the correction method, which comprises separating the correction material for thermal transfer recording from the recording medium by separating the recording medium from the recording medium, and transferring to the correction material for thermal transfer recording. For material There are, for thermal transfer recording modified material characterized in that said modified media layer comprises a polyolefin or a derivative thereof and an acrylic resin. 2. A heat-sensitive transfer recording correction material according to claim 1, wherein a heat-resistant protective layer is provided on the heat-resistant substrate on the surface opposite to the surface on which the correction medium layer is provided. . 3. The heat-sensitive transfer recording correction material according to claim 1, wherein the heat-resistant base material is paper or plastic. 4. A correction in a thermal transfer recording method in which a printing ink on a thermal transfer recording medium is melted by heating a thermal head and the molten ink is peeled off from the thermal transfer recording medium to print on a recording medium. Method,
A heat-sensitive transfer recording correction material comprising a heat-resistant base material and a correction medium layer provided thereon at a correction position on a recording medium, and the medium layer contains a polyolefin or its derivative and an acrylic resin. And heat the ink to be corrected and the correction medium layer of the heat-sensitive transfer recording correction material to melt each other, and then cool the ink at the location to be corrected and the heat-transfer recording correction material. After the melt with the correction medium layer of (1) has restored sufficient adhesive force to the correction material for thermal transfer recording, the correction material for thermal transfer recording and the recording medium are separated from each other so that the correction point is located on the recording medium. Peel off more,
A method characterized by migrating to a correction material for thermal transfer recording. 5. A thermal transfer recording medium comprising a heat resistant substrate and an ink layer provided thereon, the ink layer comprising a polyolefin or its derivative, an acrylic resin, and a coloring material. The method according to claim 4.