JPS6334181A - Thermal transfer recording method - Google Patents

Abstract

PURPOSE:To give printing having high density and good sharpness and erasable before fixing but indelible after fixing, by a method wherein a first ink layer capable of holding a shape at the time of heating and a second ink layer developing adhesiveness at the time of heating are provided on a support and heat or/and pressure is applied to a visible image to destruct the microcapsules contained in the second ink layer and fixing is performed by softening the second ink layer. CONSTITUTION:The first ink layer 14 near to a sheetlike support 12 holes the shape of a dot part at the time of the application of heat and becomes easy to release from the support through a heat-meltable binder. A second ink layer 15 holds adhesive strength to paper to be recorded at the time of the application of heat and is made easy to release from the support to be transferred. After a printed character is formed, the microcapsules containing an oil agent in the second ink layer 15 are destructed by heating or/and pressurizing and the ink layer is softened by the oil agent to fix the printed character. Since the first ink layer 14 corresponding to a dot part to which heat is applied does not flow and holds a dot shape, an image having high printing density is obtained even on paper inferior in smoothness.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a thermal transfer recording method.

[Conventional technology] The thermal transfer recording method has the general characteristics of the thermal recording method, such as the equipment used is lightweight, compact, noiseless, and has excellent operability and maintainability. It is also characterized by excellent durability of recorded images, and has become widely used.

This thermal transfer recording method generally uses a sheet-like support E.
A heat-sensitive transfer material is coated with a heat-transferable ink made by dispersing a coloring material in a heat-melting binder, and this heat-sensitive transfer material is superimposed on a recording medium so that the heat-transferable ink layer is in contact with the recording medium. , a transfer ink image corresponding to the shape of the heat supply is formed on the recording medium by supplying heat from the support side of the thermal transfer material with a thermal head and transferring the melted ink layer to the recording medium.

However, the conventional YA thermal transfer recording method has a large influence on transfer recording performance, that is, print quality or surface smoothness of the recording medium, and it is difficult to perform good printing on recording media with high smoothness. However, in the case of a recording medium with low smoothness, there is a problem that the print quality is considerably low. For this reason,
Generally, paper with a high surface smoothness is used as a recording medium, but paper with a high smoothness is rather special, and ordinary paper has various degrees of unevenness due to the entanglement of fibers.

Therefore, in the case of paper with large surface irregularities, the hot-melted ink cannot penetrate into the paper fibers during printing and only adheres to the convexities on the surface or the vicinity thereof, resulting in sharp edges of the printed image. If there is no print or part of the cover is missing, the print quality will deteriorate.

In this way, in order to provide high-quality printing on recording media with poor surface smoothness, there are limits to how molten ink can faithfully adhere to or penetrate into the fine uneven structure of recording media, as described below. exist.

Figure 2 shows an example of a cross-sectional curve measured using a stylus meter for bond paper with relatively poor smoothness (smoothness 12 seconds by Beck smoothness meter), as shown in Figure 0. The distance from the upper end of the convex part to the lower end of the recess (i.e., the depth of the valley) is often 10, and the width of the recess is sometimes over 100 μ. Therefore, FIG. 3 is a cross-sectional view of a typical thermal transfer material and a thermal head during recording, superimposed on this cross-sectional curve, with the vertical and horizontal scales being approximately the same. (In the figure, 11 is a thermal transfer material, which is formed by providing a thermal transfer ink layer 13 on one side of a support 12, 16 is a recording medium, and 17 is a thermal head). For large surfaces, it is difficult to completely fill them with molten ink.

Further, when printing is performed on such a recording medium with poor surface smoothness, it is actually an enlarged cross-sectional view of the contact portion between the thermal transfer material and the recording medium immediately after thermal transfer. As shown in Figure 4,
The transfer of the heat-melting ink is incomplete, and only a part of the heated part adheres to the convex part of the recording medium or its vicinity, and the part of the heated part that corresponds to the concave part of the recording medium adheres to the concave part of the recording medium. The part C to be printed remains untransferred, and as a result, the printing density may be insufficient or part of the image (c c HA in the figure)
) may be missing, reducing print quality.

In other words, the heat-sensitive transfer material made of conventional heat-melt ink is used for recording media with poor surface smoothness, and because the melting maturity of the heat-melt ink is low, the ink is applied only to the convex portions of the mark Qvi or the vicinity thereof. It does not adhere and only results in unsatisfactory prints, such as C or thin prints with many missing prints.

Conventionally, in order to obtain recorded images of good print quality for such recording media with poor surface smoothness, it has been necessary to use, for example, a hot-melt binder with a low melt viscosity in at least the surface layer. Alternatively, a method based on the idea that by increasing the thickness of the thermally transferable ink layer, the molten ink is faithfully adhered to or permeated into the fine uneven structure of a recording medium such as paper has been adopted. However, if a binder with a low melt viscosity is used, the ink layer becomes sticky even at relatively low temperatures, resulting in problems such as decreased storage stability and staining of non-printed areas of the recording medium, and also causes problems such as deterioration of the transferred image. Causes smearing. In addition, layer 1'1 of the thermal transferable ink layer
If you increase the size, the smearing will increase and the heat/＼
The idea was to increase the amount of heat supplied from the RAD, but there was a problem that the printing speed decreased, and it was not practical because it would fall over.

Furthermore, a thermal transfer material has been proposed in which a first -r ink layer capable of retaining its shape when heated from the support side and a second ink layer exhibiting adhesive properties when heated are provided thereon. The film covers the concave parts of the paper and allows good printing even when printed on uneven paper, and because the ink composition does not penetrate the paper very much, it can be erased, making it very useful for typewriters etc. 711, and there is a high possibility of falsification.

[Problems to be Solved by the Invention] The present invention has been made to solve the above-mentioned conventional problems, and the main purpose of the present invention is to improve surface smoothness while maintaining various thermal transfer performances. It provides high-density and sharp prints not only on high-quality recording media but also on recording media with good surface smoothness, and is erasable before fixing and tamper-proof after fixing. It is an object of the present invention to provide a thermal transfer recording method that can print a large number of characters.

[Means for solving the problems] That is, the thermal transfer recording method provided by the present invention is as follows:
On the support, from the support side, the first
At least one ink layer and a second ink layer exhibiting heat adhesion are provided in the second ink layer,
A heat-sensitive transfer agent containing microcapsules containing an oil agent that is liquid or semi-solid at room temperature is beaded onto a recording medium, heat is applied from the support side to form a visible image by transfer, and then the visible image is Fixing is performed by applying heat and/or pressure to destroy the microcapsules contained in the at least second ink layer and softening the at least JS2 ink layer by the inclusions. .

According to the thermal transfer recording method of the present invention, when energy is applied to the thermal transfer material by a means such as a thermal head and the ink layer is heated, the second ink layer in the dot portion corresponding to the heating exhibits adhesiveness during heating. When the recording medium and the thermal transfer material are peeled off, the first ink layer adheres to the recording medium, and when the recording medium and the thermal transfer material are peeled off, the ink layer transfers to the recording medium side. It is extremely difficult to deform, so when heat is applied, the shape of the corresponding dot part is maintained, and the adhesive force of the second ink layer transfers it to the recording medium side, covering the concave part of the recording medium, so that the printing density is increased. This means that high-quality prints with less chipping can be obtained.

Furthermore, by applying heat and/or pressure after printing, the microcapsules in the second ink layer are destroyed, and the ink is softened by a liquid or semi-solid oil at room temperature in the microcapsules, and the ink layer is firmly attached to the recording medium. Since it is glued, it is highly tamper-proof.

In the present invention, in order to make the first ink layer of the thermal transfer material capable of retaining its shape when heated, for example, an aluminous to organic filler (preferably in the form of fine particles) is bound with a meltable binder. It can be constructed by having a structure that does not easily deform when worn and heated. In order to make the second ink layer a layer that exhibits heat adhesive properties, this can be achieved, for example, by using a heat adhesive binder.

The present invention will be described in further detail below with reference to the drawings as necessary.

In the following description, "%" and "parts" used for quantitative ratios are based on gi amount unless otherwise specified.

1L21 is a schematic diagram in the thickness direction of a heat-sensitive transfer material in the most basic embodiment of the present invention. That is, the thermal transfer material 11 is usually formed by forming a thermal transferable ink layer 13 on a sheet-like support 12, and the thermal transferable ink layer 13 has a monolayer structure or a multilayer structure. The thermally transferable ink layer 13 having a multilayer structure consists of a first ink layer 14ζ close to the sheet-like support 12 and a second ink M15 in contact with the recording medium. The first ink layer 14 contains inorganic or organic fine particles and a heat-fusible binder as one component.

The second ink layer 15 mainly includes microcapsules containing an oil agent that is liquid or semi-solid at room temperature and a heat-adhesive binder.

As the support 12, conventionally known films and papers can be used as they are, such as polyester, polycarbonate, triacetyl cellulose, polyamide,
Plastic films with relatively good heat resistance such as polyimide, cellophane or parchment paper, condenser paper, etc. can be suitably used. The thickness of the support is preferably about 1 to 15 microns when considering a thermal head as a heat source during thermal transfer.For example, a heat source that can selectively heat the thermal transfer ink layer using laser light may be used There are no particular restrictions when using a thermal head, and when using a thermal head, the surface of the support that comes into contact with the thermal head may be coated with silicone resin, fluororesin, polyimide resin, epoxy resin, phenolic resin, melamine resin, nitrocellulose, etc. The heat resistance of the support can be improved by providing a heat-resistant protective layer consisting of the following, or it is possible to use a support material that could not be used conventionally.

In the example shown in FIG. 1, the first ink layer 14 covers four parts of the recording medium, so it does not flow even when heat is applied and maintains the shape of the dot portion to which heat is applied, and the first ink layer 14 covers four parts of the recording medium. 2. The heat-melting binder constituting the ink layer melts when heat is applied, making it easy to peel off from the support.
It has two effects.

In order to function in this way, the first ink layer 14 must be made of a binder 8b that melts when heat is applied by means such as a thermal head, and inorganic and/or organic fine particles that control the fluidity of the binder 8b. or is necessary. When the first ink layer 14 is heated, fIL! In order to transfer the ink while keeping its shape without lI, the apparent viscosity of the ink is maintained at the flow start temperature (Shimadzu Flow Tester CFT-500A type), a load of 30 kg, and a temperature increase rate of 2°C/sin. When the temperature curve is calculated, the temperature at which the ink starts to flow out from the nozzle of the cylinder) is 60°C to 180°C, especially 60°C to
Preferably, it is in the range of 160°C. If the outflow start temperature is less than 60°C, when heat is applied under pressure, the first ink layer will melt and flow or deform, corresponding to the dots to which heat is applied. The ink layer portion cannot sufficiently cover the concave portions of the paper, which is undesirable as it leads to a decrease in edge sharpness due to print defects and a decrease in print density.

If the outflow starting temperature exceeds 180° C., it is not preferable because even if heat is applied, the film may not be cut between the heat applying part and the violent heat applying part, or it may easily peel off from the support, making it impossible to obtain good printing.

The heat-melting binder constituting the first ink layer has a softening point RAB method of 50°C to 160°C, particularly preferably 60°C to 150°C. If the softening temperature is less than 50°C, the ink layer will remain sticky and the printed documents When you save the documents one on top of the other, the documents may stain each other, or the ink may transfer to the back of the document, which is undesirable.
Furthermore, if the temperature is 160° C. or higher, the transferability may deteriorate or the energy applied during printing may become too high, leaving problems in compatibility with hardware.

Heat-melting binders that meet these conditions include natural waxes such as spermaceti wax, beeswax, lanolin, carnauba wax, candelilla wax, montan wax, and ceresin wax, petroleum waxes such as paraffin wax and microcrystalline wax, oxidized waxes,
Synthetic waxes such as ester walrus, low molecular weight polyethylene, Fuchsia Robuschwa Six, higher fatty acids such as lauric acid, myristic acid, monovalmitic acid, stearic acid, and behenic acid, higher alcohols such as stearyl alcohol and behenyl alcohol, and alcohols such as stearyl alcohol and behenyl alcohol. Esters such as sugar fatty acid esters and sorbitan fatty acid esters, amides such as oleylamide, polyamide resins, polyester resins, epoxy resins, polyurethane resins, polyolefin resins, polyacrylic resins, polyvinyl chloride resins Elastomers or plasticizers such as resins, polyvinyl acetate resins, cellulose resins, polyvinyl alcohol resins, petroleum resins, phenolic resins, polystyrene resins, natural rubber, styrene-butadiene rubber, isoprene rubber, chloroprene rubber, mineral oil,
An oil agent such as vegetable oil is appropriately selected, mixed if necessary, and used in such a manner that it falls within the above-mentioned softening point range.

The fine particles, which are another element constituting the first ink layer, are made of organic materials such as carbon black, graphite, calcium oxide, calcium carbonate, talc, barium sulfate, carbonate, etc. There are gold powders such as magnesium, alumina, silica, copper, and nickel, and organic fine particles include organic pigments, wood powder, bone powder,
Finely ground crosslinked and solidified thermosetting resin, styrene
Gelled spherical particles of acrylic 84 fat, molecular weight 500.0
There are fine particles of high molecular weight polyolefin with about 0 fat content or more. These may be used alone or in combination.The average particle diameter of the fine particles is determined by the sedimentation method as 1), 1 to 5, and more preferably 0. The old ~ IJL one is good.

The ratio of the heat-fusible binder and fine particles constituting the first ink layer must be blended so that it falls within the above-mentioned outflow starting temperature range, and in addition, from the viewpoint of print cutting, the ratio of the fine particles/heat-fusible binder = 1/9 to 8/2 is desirable; if it is less than 1/9, 1 in the first ink layer
If the M4J force is too strong, the printing will be cut off, especially because of the film-like excess transferred portion in the direction of running of the hot head of the dots, which is undesirable. The second ink layer 15, which is undesirable because it does not form a layer, has adhesive force to the recording paper when heat is applied, and is easily peeled off from the support at the interface between the support and the first ink layer. To play the role of transferring the first ink layer from the support side to the recording paper side, and to destroy the microcapsules 9a containing the oil agent in the second ink layer 15 by heating and/or applying pressure after forming the print. The oil agent in the microcapsules 9a serves to soften the ink layer and fix the print, and the second ink layer 15 is mainly composed of a heat-adhesive binder and an oil-containing mancrocapsule.

Further, as the oil agent, a semicircular shape that is liquid at room temperature or has a softening point or melting point of 60° C. or lower is used. Specific examples of such oils include cottonseed oil, rapeseed oil, camellia oil, castor oil, peanut oil, olive oil, lanolin, beef tallow, lard, animal and vegetable oils such as whale oil, mineral oils such as motor oil, spindle oil, and dynamo oil, vaseline, and glycerin. ,
In addition to polyethylene glycol, dioctyl phthalate, tricresyl phosphate, dibutyl phthalate, monoolein, sorbitan trioleate, etc., derivatives such as waxes, higher fatty acids or their esters within the range that satisfies the conditions in 1-1. , thermal IIf plastic resins, etc. are also used.

To obtain microcapsules containing the above-mentioned oil agent,
Conventional microencapsulation methods such as a method of dispersing an oil agent in a solution of wall material resin and spray drying the dispersion, a phase separation method, a complex coacervation method, and an interfacial polymerization method are adopted as appropriate.Also, as a wall material resin, Also, known 8QT plastic resins or thermosetting resins suitable for these microencapsulation methods are suitable.

The microcapsules have a diameter of 11 to 15 g, especially 0.
1-10 #L can be preferably used.

The thickness of the deposited resin is preferably 0.0 l-os #L.

On the other hand, thermoadhesive binders soften or melt when heat is applied using a heat head or other means, and have adhesive strength to the recording paper through mechanical adhesion such as a projection effect or chemical adhesion such as van der Waals forces, covalent bonds, and hydrogen bonds. It is necessary to have. That is, the recording paper and the polyester film were made to have a thickness of 10 mm.
100°C through the material constituting the second ink layer of IL
, l kg/cm", A 180'" peel test was performed on a test piece with a diameter of 25 mm bonded under pressure and heating conditions of 1 second at 25°C and 100 mm/sin, and the peel strength at that time was 30 g/cm.
It is preferable to use a material with an adhesive strength of 25 mm or more, and the temperature at which such adhesive strength is developed is preferably 65 to 150°C from an adhesion test on a thermally inclined hot plate6.
If the temperature is below 5 degrees Celsius, the ink ribbon will have poor storage stability.
If the temperature is higher than 150° C., sufficient adhesive force cannot be developed, which is not preferable.

Materials that meet this adhesive strength and adhesive force development temperature include polyolefin resins, polyvinyl acetate resins, polyvinyl chloride resins, polyacrylic resins, polyester resins, polyvinyl butyral resins, polyamide resins, and polyurethane. elastomers such as polyvinyl alcohol resin, polystyrene resin, petroleum resin, phenol resin, epoxy resin, natural rubber, styrene butadiene rubber, isoprene rubber, chloroprene rubber, or the above resins with plasticizers and mineral oil. , a mixture of oils such as vegetable oil, a blend of the above-mentioned resins, or a heat-sensitive and pressure-sensitive IaB agent such as an EVA hot melt adhesive can be used. The oil agent-containing microcapsule contains 2 to 200 parts, preferably 5 to 100 parts, based on the 161.
It is used by mixing it with a heat-adhesive binder. The oil agent-containing microcapsules only need to be included in at least the second ink layer 15, and of course may be included in the first ink layer 14.

The thickness of the first ink layer is preferably 1 to 10 gm, the thickness of the second ink layer is preferably 0.1 to lopm, and the thickness of all ink layers is preferably 1 to 15 ITl.

At least one of the first and second ink layers 14.15 contains a colorant. Whether or not both layers contain a colorant is desirable; the second ink layer has a colorant content of 0 to 20%, and the first ink layer preferably has a colorant content of 0 to 8%, depending on its adhesion to the recording medium.
0% is desirable.

Furthermore, the above-mentioned outflow start temperature, adhesive strength, and IarI force development temperature are, of course, for the state in which the microcapsules containing the coloring agent oil or the inorganic and/or organic fine particles added are contained in the first ink layer.

As the coloring material, various dyes and pigments widely used in the field of printing and recording are used.

The thermal transfer material of the present invention is in a state as shown in FIG. 5 before transfer, or is heated and pressed in contact with the recording medium 16 between the head 17 and platen 18 as shown in 61''!!l during transfer. As a result, the second ink layer adheres to the convex portion of the recording medium 4 and generates adhesive force with the recording medium 16.The first ink layer has reduced adhesion to the support at the heated portion, and Furthermore, due to a decrease in the concentration of the first ink layer, the first ink layer peels off from the support as shown in Fig. 7 and breaks from the boundary between the heat-applied area and the non-heat-applied area, and corresponds to the heat-applied dot area. Since the first ink layer does not flow and maintains a dot shape, it covers the concave portions of the recording medium and provides 1t19 with high print density without print defects even on highly uneven paper with low smoothness. .

In order to obtain the thermal transfer material of the present invention, a first ink layer, a second ink layer,
For each of the ink layers, if necessary, materials selected from the above-mentioned heat-melting binders, oil-containing microcapsules, fine particles, colorants, additives, etc. are melt-kneaded using a dispersion or mixing device, or Alternatively, the ink may be kneaded with a suitable solvent to obtain a hot-melt ink or a solution or dispersion ink, and these inks may be sequentially applied onto a support to form a first ink layer and a second ink layer.

The planar shape of the thermal transfer material of this invention is not particularly limited, but it is generally used in the shape of a typewriter ribbon or a wide tape used in line printers. Further, for color recording, a heat-sensitive transfer agent may be used in which heat-melting inks of several tones are applied separately in stripes or blocks.

The thermal transfer recording method using the above thermal transfer material is not particularly different from a normal thermal transfer recording method until an image is obtained, but after the image is formed, heat and/or pressure is applied to the image to form a second ink layer. This differs from the conventional thermal transfer recording method in that it includes a fixing process in which the microcapsules inside are destroyed, the oil agent in the microcapsules permeates into the ink layer, the ink layer is softened, and the image is fixed. FIG. 2 is a schematic cross-sectional view in the thickness direction of a heat-sensitive transfer material showing the main points.

That is, the recording medium 16 is brought into close contact with the heat-melting ink layer 10 of the thermal transfer material 11, and the platen 18 is
The ink layer 13 is locally heated in accordance with a desired printing or transfer pattern by applying heat pulses by a thermal head 17 while supporting the ink layer 13 by a thermal head 17 . The temperature of the heated portion of the ink layer 13 increases, and the second ink layer adheres to the recording medium, and is transferred to the recording medium together with the first ink layer, which has softened and becomes easier to separate from the support, leaving a recorded image 19a. Furthermore, by passing this recorded image 19a between fixing rollers 20a and 20b and applying heat and/or pressure, the microcapsules in the second ink layer are destroyed as shown in the recorded image 19b, and the encapsulated oil agent and the ink layer are destroyed. Penetrates the paper. Therefore, the recorded image 19b becomes soft and strongly adheres to the recording paper, and even if the printed image is partially peeled off, a portion of the colored ink 19b' remains on the recording paper, making it reliable to prevent tampering.

In the above, an example in which a thermal head is used as a heat source for thermal transfer recording has been described, but it is easy to understand that the same method can be used when using other heat sources such as a laser beam.

[Example] The present invention will be explained in more detail with reference to Examples below.

Example 1 Prescription A.

Each component of the above formulation was stirred at room temperature for 15 minutes to uniformly disperse carbon black to prepare ink A for the first ink layer.

1' The water to Nno is complete υ-C1! The temperature at which solids began to flow into the lr2 ring was 95°C.
Ink for the ink layer was prepared in the following order.

9 parts of dibutyl phthalate (DBP) are emulsified and dispersed in 30 parts of a 10% aqueous gelatin solution containing sodium dodecyl sulfate as a surfactant using an ultrasonic emulsifier. This dispersion liquid is dispersed in 30 parts of lθ% gum arabic aqueous solution. 140f of 40°C hot water while stirring! Add A and adjust the pH to 4-4.3 using 10% acetic acid.
IWJ. Cool this solution to 5°C, add 1 part of 30% formalin aqueous solution, and then dropwise add 10% Na011 aqueous solution to control the pH of the system to 9.6 Next, raise the temperature of the system to 50°C to disperse microcapsules. Get the liquid. This capsule dispersion was centrifuged and dried to obtain DBP-containing microcapsules. The average particle size was 3.

Prescription B Coating liquid B for second ink layer was obtained by mixing each component of the above recipe. This coating solution B was coated on a polyethylene terephthalate film (hereinafter referred to as PET film) to a thickness of toIL, and the dried test paper was layered on top of the coated paper, and the coating solution was processed by 1 kg/am'' on a thermally inclined plate (Kofler hot bench) 1. When bonded for 1 second under pressure, it was found that the adhesive bonded at a bonding temperature of 78°C or higher.Also, when bonded under the same conditions at 90°C, the peel strength (180°C peel strength) was 180 g/25 m/m. .1.5 Coat ink A on the PET film with an applicator, dry at 50°C for 5 minutes, and dry thoroughly with water to a thickness of 64 mm.
Finally, apply ink B to the first ink layer 1- with an applicator in the same manner as above. Dry at SSO°C for 5 minutes to obtain a second ink layer with a thickness of 4 μm to form a heat-sensitive transfer material. CI)
completed.

Comparative Example A thermal transfer material (n) was completed in the same manner as in the example except that DPE-containing microcapsules were not blended into the second ink layer. Thermal transfer material CI), (n
) using a serial type thermal head (resistance value 6
8Ω, pulse width 1.1ssec, applied voltage 6.5V)
Printing was performed on paper with a Bekk smoothness of 12 seconds using an applied voltage of
Next, in the example, it was passed between fixing rolls at a pressure of 5 kg/cm''.The printing evaluation and fixing evaluation at that time are shown in the table below.

Table note: The print density and hollow print are based on the obtained print "I"
Slit the vertical line of `` with a microdensitometer (Konishi Roku Photo Industry Co., Ltd. GL) rllllQOX100m.
Under these conditions, take the average value of the values measured in the lateral direction three times. In this case, the sum of the heights of the first to third highest peaks of the convex peaks in the preceding chart is 1 (I), and the sum of the heights of the first to third lowest concave peaks is Hkll. .Print density is 1LAx+11611M□, and hollow print is 1LAx-11v+.

□.

For each value, the calculation results obtained by measuring and calculating three different parts are shown. The higher the value, the better the density of the print, and the smaller the value, the better the print with fewer holes.

The fixability was evaluated based on the degree of remaining print when the print was moved back and forth 10 times with a No. 5lO eraser manufactured by Lion Co., Ltd. under a load of 500 g/cm2.

As described above, the thermal transfer recording method of the present invention provides good prints with high print density, no blurring, no blurring, and few hollow holes, is easy to correct, and has excellent tamper resistance. It is very effective because it allows

4. Accurate explanation of Z-plane Figure 1 is a schematic cross-sectional view of the thermal transfer material used in the thermal transfer recording method described in Book 9.1], and Figure 2 is a schematic cross-sectional view of the heat-sensitive transfer material used in the thermal transfer recording method described in Book 9.1.
2 seconds), the cross-sectional curve measured using a stylus meter, 3rd
The figure is a cross-sectional view of a typical thermal transfer material and thermal head during recording, superimposed on the cross-sectional curve of Figure 2. Figure 4 is an enlarged cross-sectional view of the contact area between the thermal transfer material and the recording medium immediately after thermal transfer. , FIG. 5 is used in the present invention! The schematic cross-sectional view and tjSG diagram before thermal transfer in the case of thermal transfer using the il thermal transfer material are 11! used in the present invention. A schematic cross-sectional view when heat is applied to the thermal transfer material, No. 71'''4 is a schematic cross-sectional view after the thermal transfer material and recording medium are separated after heat is applied to the thermal transfer material used for ungenerated IJl, Fig. 8 1 is a schematic cross-sectional view showing the thermal transfer recording method of the present invention.

11-! l! thermal transfer material, 12...-Support, 13...-thermal transferable ink layer, 16...recording medium, 18...Platen, 17...I have a fever.

Agent Patent Attorney Sekihei Yamashita Direction 1 Figure 2 ― Figure 3

Claims (1)

[Claims] On the support, from the support side, the first
and a second ink layer that exhibits adhesive properties when heated, and at least the second ink layer contains microcapsules containing an oil agent that is liquid or semi-solid at room temperature. After superimposing the material on the recording medium and applying heat from the support side to form a visible image by transfer, heat and/or pressure is applied to the visible image to remove the microorganisms contained in the at least second ink layer. A thermal transfer recording method characterized in that fixing is performed by destroying a capsule and softening the at least second ink layer by the inclusions.