JPS6322685A - Thermal transfer recording method - Google Patents

Abstract

PURPOSE:To impart high density printing erasable before fixing but indelible after fixing while keeping thermal transfer capacity, 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, after a visible image due to transfer is formed, the microcapsule contained in the second ink layer is broken to perform fixing. CONSTITUTION:A recording medium 16 is closely contacted with the heat- meltable ink layer 13 of a thermal transfer material 11 and the ink layer 13 is locally heated from the back surface of the recording medium 16 corresponding to desired printing by a thermal head 17. A second ink layer 15 is adhered to the recording medium 16 and transferred thereto along with the first ink layer 14 becoming easily releasable from a support by softening to leave a recording image 19a. Further, this recording image 19a is passed between fixing rollers 20a, 20b to receive heat and/or pressure and the microcapsules 15a in the second ink layer are broken corresponding to the recording image 19b to allow color ink 19b' encapsulated to penetrate paper.

Description

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

[Prior Art] The thermal transfer recording method has the general features of the thermal recording method such that the equipment used is lightweight, compact, noiseless, and has excellent operability and maintainability. It is unnecessary and has the characteristics of excellent durability of recorded images, and has recently begun to be widely used.

This thermal transfer recording method generally uses a thermal transfer material made by coating a sheet-like support with a thermal transferable ink made by dispersing a coloring material in a heat-melting binder, and transfers this thermal transfer material to the thermal transfer material. The ink layer is superimposed on the recording medium so as to be in contact with the recording medium, and heat is applied from the support side of the thermal transfer material by a thermal head to transfer the melted ink layer onto the recording medium, thereby applying heat onto the recording medium. A transfer ink image is formed according to the shape of the supplied ink.

However, in the conventional thermal transfer recording method, the transfer recording performance, that is, the print quality or the surface smoothness of the recording medium, has a large @'ff. In the case of a recording medium with a low hardness, there is a problem in that the print quality deteriorates significantly. For this reason,
Generally, paper with a high surface smoothness is used as a recording medium.

Paper with a high level of smoothness is rather special. 1 Ordinary paper is due to the entanglement of fibers! ! It has a degree of unevenness. 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. Or some parts of the statue are missing.
This will reduce print quality.

As described below, there are limits to how molten ink can faithfully adhere to or penetrate into the fine uneven structure of a recording medium in order to provide good quality printing on a recording medium with poor surface smoothness, as described below. do.

Figure 2 shows an example of the cross-sectional curve ρ measured using a stylus needle for bond paper with relatively poor smoothness (smoothness 12 seconds by Beck smoothness meter). Distance It from the upper end of the convex part to the lower end of the concave part (i.e. depth of the valley)
is often expressed as 10 =, and there are cases where the width of the recess exceeds 1ooIL (in Fig. 2, the scale in the vertical and horizontal directions is not uniform), so this cross-sectional curve has FIG. 3 is a superimposed cross-sectional view of a typical thermal transfer material and thermal head during recording, with the vertical and horizontal scales being approximately the same (in the figure, 11 is the thermal transfer material, and this is the same as the support 12).・A thermally transferable ink layer 13 is provided on the - side.As can be seen from 16 (representing the recording medium and 17 representing the thermal head), the four large surfaces are completely filled with molten ink. is an integral part.

Further, when printing is performed on such a recording medium with poor surface smoothness, X is an enlarged 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 portion of the heated part adheres to the convex part of the recording medium or its vicinity, and in addition to the non-heated part a, the heated part corresponds to the concave part of the recording medium. The portion C remains untransferred, and as a result, the print density is insufficient or a part of the image (U: 4 cc portion) is missing, degrading the print quality.

In other words, conventional heat-sensitive transfer materials made of heat-melt ink adhere to recording media with poor surface smoothness, but because the melt viscosity of the heat-melt ink is low, the ink adheres only to the convex portions of the recording medium or the vicinity thereof. figure.

Only unsatisfactory prints with low print density and many missing prints can be obtained.

Conventionally, in order to obtain a recorded image of good print quality on such a recording medium 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, or A method has been adopted based on the idea that by increasing the thickness of the thermally transferable ink layer, molten ink is faithfully adhered to or penetrated into the fine uneven structure of a recording medium such as paper. However, when a binder with a low melt viscosity is used, the ink layer becomes sticky even at relatively low temperatures, resulting in decreased storage stability and
This causes inconveniences such as staining of the non-printed areas of the W body, and also causes blurring of the transferred image. In addition, when increasing the thickness of the thermal transfer ink layer, bleeding becomes larger and the amount of heat supplied from the thermal head also needs to be increased, which causes the problem of a decrease in printing speed, which is not practical. Ta.

In addition, a thermal transfer material has been proposed in which a first ink layer capable of retaining its shape when heated is provided from the support side, and a second ink layer that exhibits Ta adhesion when heated is further provided on the first ink layer. The film covers the concave parts of the paper, allowing good printing even on uneven paper, but because the ink composition does not penetrate the paper very much, it can be erased, making it very useful in typewriters, etc. However, it has the disadvantage that it is highly susceptible to tampering.

[Problems to be Solved by the Invention] The present invention has been made to solve the above-mentioned conventional problems.1 The main purpose of the present invention is to improve surface smoothness while maintaining various thermal transfer performances. Not only is it suitable for recording media of good quality, but also recording media with poor surface smoothness can be printed with high density and sharpness. Moreover, it is erasable before fixing and cannot be tampered with after fixing. An object of the present invention is to provide a thermal transfer recording method that provides accurate printing.

[Means for solving the problems] That is, the thermal transfer recording method provided by the present invention is as follows:
On the support body, in order from the support side, there are first
an ink layer and a second ink layer that exhibits adhesive properties when heated, and at least the second ink layer contains microcapsules encapsulating a colorant and an oil agent that is liquid or semi-solid at room temperature. The heat-sensitive transfer agent is superimposed on the recording medium and heat is applied from the support side to form a visible image by transfer, and then heat and/or pressure is applied to the visible image to contain it in the at least second ink layer. This method is characterized in that the microcapsules contained in the recording medium are destroyed and the contents are infiltrated into the recording medium for fixation.

According to the thermal transfer recording method of the present invention, when energy is applied to the thermal transfer material by 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 mR property when heated. The first ink layer adheres to the recording medium and moves the ink layer to the recording medium side when the recording medium and the thermal transfer material are peeled off. However, it is extremely difficult to deform, so when heat is applied, the shape of the corresponding dot part is maintained and transferred to the recording medium side by the adhesive force of the second ink layer, covering the concave part of the recording medium, resulting in high print density. This results in high-quality printing with fewer print defects.

Furthermore, by applying heat and/or pressure after printing, the microcapsules in the second ink layer are destroyed and the colored ink, which is liquid or semi-solid at room temperature, in the microcapsules is permeated into the recording medium, making it tamper-proof. It becomes possible.

In the present invention, in order to bring the first ink layer of the thermal transfer material into a state where it can retain its shape when heated, 1. For example, a meltable binder is used as an airless to organic filler (preferably in the form of Wk particles). It can be constructed by binding together to create a structure that does not easily deform even when heated. Furthermore, the second ink layer can be made to exhibit heat adhesive properties by using, for example, 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, quantitative ratios such as "%" and "parts" are based on the sub-ffi standard unless otherwise specified.

FIG. 1 is a schematic cross-sectional view in the thickness direction of a thermal transfer material in the most basic embodiment of the present invention. That is, thermal transfer material 1
1 is usually formed by forming a thermally transferable ink layer 13 on a sheet-like support 12.

The thermal transferable ink layer 13 itself has a multilayer structure. The thermally transferable ink layer 13 having a multilayer structure includes a first ink layer 14 close to the sheet-like support 12 and a second ink layer 15 in contact with the recording medium. The first ink layer 14 mainly contains porcelain to organic fine particles and a heat-fusible binder. The second ink layer 15 mainly includes microcapsules 15a containing an oil agent and a colorant that are liquid or semi-solid at room temperature, and a thermoadhesive binder.

As the support 12, conventionally known films and papers can be used as they are, such as polyester, polycarbonate, triacetylcellulose, 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. There are no particular restrictions on the use, and when using a thermal head, silicone resin, fluororesin, polyimide resin, epoxy resin, phenol resin, melamine resin, nitrocellulose may be used on the surface of the support that comes into contact with the thermal head. The heat resistance of the support can be improved by providing a heat-resistant a-layer consisting of the like, or it is also possible to use a support material that could not be used conventionally.

In the example of ill, since the first ink layer 14 covers the concave portions of the recording medium, 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 The thermofusible binder that makes up the material is melted by applying heat.

It has two effects: it becomes easy to peel off from the support.

In order to work in this way, the first ink M! f14
The binder 8b needs to be composed of a binder 8b that melts when heat is applied by means such as a heating head, and inorganic and/or organic fine particles that control the fluidity of the binder 8b. In order to transfer the first ink layer 14 while maintaining its shape without flowing when heat is applied, the outflow start temperature (using a Shimadzu flow tester (Model FT-500A, load 30 kg, temperature increase) is required. speed 2
The apparent temperature of the ink is the temperature at which the ink begins to flow out from the nozzle of the cylinder when the viscosity-temperature curve is calculated under the condition of °C/sin) is 60 °C to 180 °C, particularly 60 °C to 1
Preferably, it is in the range of 60°C. If the %E onset temperature is less than 60°C, the first ink layer may melt and flow or deform when heat is applied under pressure, causing the dots to be heated. The ink layer corresponding to the ink layer 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 may not be possible to cut between the heat-applied area and the non-heat-applied area even when heat is applied, or it may easily peel off from the support, resulting in poor printing or not being possible.

The heat-melting inder constituting the first ink layer has a softening point RAB method of 50°C to 160°C, especially 60°C to 150°C.
If the temperature is below 50°C, the ink layer will remain sticky, and when printed documents are stacked and stored, the documents will stick together or the ink will 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 Nisderwalas, low molecular weight polyethylene, and Fischer-Tropsch wax, higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid, higher alcohols such as stearyl alcohol and behenyl alcohol, fatty acid esters of sucrose, and sorbitan. Esters such as fatty acid esters, amides such as oleamide, polyamide resins, polyester resins, epoxy resins, polyurethane resins, polyolefin resins, polyacrylic resins, polyvinyl chloride resins, polyvinyl acetate resins, Elastomers such as cellulose resin, polyvinyl alcohol resin, petroleum resin, phenolic resin, polystyrene resin, natural rubber, styrene-butadiene rubber, imprene rubber, chloroprene rubber, or plasticizer, oil agent such as mineral oil, vegetable oil, etc., as appropriate. They are selected, mixed if necessary, and used in such a way that they fall within the above softening point range. ′
The fine particles, which are another element constituting the first ink layer, are made of pure or organic materials, and the inorganic fine particles include carbon black, graphite, calcium oxide,
There are metal powders such as calcium carbonate, talc, barium sulfate, magnesium carbonate, alumina, silica, copper, and nickel, and alkaline fine particles include organic pigments, wood powder, bone powder,
Finely ground crosslinked and solidified thermosetting resin, styrene
Gelled spherical fine particles of acrylic resin, molecules l1lsoo,
oo.

There are fine particles of high molecular weight polyolefin of about 100% or more. These may be used alone or in combination.The average particle size of the fine particles is determined by the sedimentation method or 0. O1-5, more preferably 0.01
~ig's 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 = t/'] ~ 8/2 is desirable; if it is less than 1/'I, the cohesive force within the first ink layer is strong, leading to print breakage, especially the film quality of dots in the running direction of the thermal head. The second ink layer 15 is undesirable because it becomes difficult to cut due to the excess transferred portion, and when it exceeds 8/2, the binding force due to the heat-melting binder is lost and one layer is not formed, which is undesirable. , has an adhesive force to the recording paper, and plays the role of transferring the pAg & easy-to-stick first ink layer from the support to the recording paper at the support-first ink layer interface. After forming the print, heat and/or pressure is applied to form the second ink layer 1.
The microcapsules 9a containing the colored ink in the microcapsules 9a are destroyed, the colored ink in the microcapsules 9a penetrates into the recording medium, and the print is fixed.
Second ink Jf? 15 is composed of a thermoadhesive binder and a microcapsule containing colored ink. 0 The microcapsule containing colored ink can use all the dyes, pigments, etc. used in normal recording as a coloring material, and can also be used as an oil agent. is liquid at room temperature or semi-solid with a softening point or melting point of 60° C. or lower. Specific examples of such oils include cottonseed oil, rapeseed oil, camellia oil, castor oil, peanut oil, olive oil, lanolin, beef tallow,
Animal and vegetable oils and fats such as lard and whale oil, mineral oils such as motor oil, spindle oil, and dynamo oil, petrolatum, chrycerin, polyethylene glycol, dioctyl phthalate, tricresiflephosphate, dibutyl phthalate, monoolein, and sorbitan trioleate, as well as the above. Waxes, derivatives such as higher fatty acids or their esters, thermoplastic resins, etc. can also be used within the range that satisfies the conditions.

In order to obtain the microcapsules containing the coloring material and oil described in 2.1, a mixture of the R coloring material and the oil is obtained, and then this is dispersed in a solution of wall material resin, and one dispersion is spray-dried, or a phase Conventional microencapsulation methods such as separation method, complex coacervation method, and interfacial polymerization method are adopted as appropriate.Also, as wall material resin, known thermosetting resins or thermosetting resins suitable for these microencapsulation methods can be used. Resin is appropriately employed.

The microcapsules have a diameter of 0.1 to 15. Especially 0-
1 to 10, later can be preferably used.

The thickness of the coating resin is preferably in the range of 0.01 to 0.5 mm.The ratio of each component in the microcapsules is 2 to 200 parts of oil, especially 5 to 10 parts of oil per 10 parts of colorant.
A range of 0 parts is preferred.

On the other hand, thermoadhesive binders soften or melt when heat is applied by means such as a thermal head, and have adhesive strength due to mechanical PaR such as a throwing effect, van der Waals force, covalent bond, hydrogen bond, etc., to the recording paper. It is necessary to have In other words, the recording paper and the polyester film have a thickness of 1
100 through the material constituting the second ink layer of OJL.
A test piece with a diameter of 25 mm bonded under pressure and heating conditions of 1 kg/cm'' and 1 second at 25°C was subjected to a 180@feather peel test at 25°C and the peel strength was 30g725.
It is preferable to use a material with an adhesive strength of m5 or more, and the temperature at which such adhesive strength is developed is preferably 65 to 150 degrees Celsius based on an adhesion test on a thermally inclined hot plate.
If it is less than 15, the storage stability of the ink ribbon will be difficult.
If the temperature is 0° C. or higher, sufficient adhesive strength 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. resins, polyvinyl alcohol resins, polystyrene resins, petroleum resins, phenolic resins, epoxy resins, natural rubber, styrene-butadiene rubber,
Heat-sensitive and pressure-sensitive materials such as elastomers such as isoprene rubber and chloroprene rubber, or mixtures of the above resins with appropriate oils such as plasticizers, mineral oils, and vegetable oils, blends of resins listed in E, and EVA-based hot melt adhesives. You can use adhesive.

The colored ink-containing microcapsules are mixed with 2 to 200 parts, preferably 5 to 100 parts, of a thermoadhesive binder per 16 parts of the microcapsules.The colored ink-containing microcapsules are included in at least the second ink layer 15. Of course, it may be included in the first ink layer 14.

The thickness of the first ink layer is preferably 1 to loILm, the thickness of the second ink layer is preferably 0.1 to log,m, and the thickness of the entire ink layer is preferably 1 to 15 pm.

At least one of the first and second ink layers 14.15 contains a colorant. It is desirable that both layers contain a colorant, or the second ink layer should contain a coloring agent of 0 to 20%, and the first ink layer should preferably contain a colorant of 0 to 8%, depending on its adhesion to the recording medium.
0% is desirable.

In addition, the above-mentioned outflow start temperature, adhesive strength, and adhesive force development temperature are, of course, for the state in which the colorant-containing microcapsules or the inorganic and/or organic forged particles added in the first ink layer are contained. .

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 pressurized in contact with the recording medium 16 between the head 17 and platen 18 as shown in FIG. 6 during transfer. As a result, the second ink layer adheres to the convex portions of the recording medium 4 and generates adhesive force with the recording medium 16. The adhesion of the first ink layer to the support at the heated portion decreases, and the cohesive force within the first ink layer also decreases, causing the first ink layer to peel off from the support as shown in Figure 7, leaving the heated area and the non-contact area. It breaks at the border with the heat application section. In addition, since the first ink layer corresponding to the dot portion to which heat is applied does not flow and maintains the dot shape, it covers the concave portions of the recording medium and prevents print defects even on highly uneven and low smooth paper. An image 19 with high print density and no blemishes is obtained.

In order to obtain the thermal transfer material of the present invention, a first ink layer, a second ink layer,
For each ink layer of
Materials selected from fine particles, colorants, additives, etc. are melted and kneaded using a dispersion or mixing device, or kneaded with a suitable solvent to obtain hot-melt, solution or dispersion ink. Ink is 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 the present 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-mentioned 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 an image in the MS2 ink layer. The difference from the conventional thermal transfer recording method is that it includes a fixing step in which the microcapsules are destroyed and the colored ink in the microcapsules permeates into the recording medium. It is.

That is, the recording medium 16 is brought into close contact with the heat-melting ink layer 13 of the thermal transfer material 11, and the platen 18 is
The ink 7913 is locally heated in accordance with a desired printing or transfer pattern by applying heat pulses by the thermal head 17 while being supported by the ink 7913. The temperature of the heated portion of the ink layer 13 rises, 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 is easily peeled off from the support, leaving a recorded image 19a. , Furthermore, this recorded image 19
A is passed between the fixing rollers 20a and 20b and heated or/
By applying pressure, the microcapsules in the second ink layer, such as the recorded image 19b, are destroyed and the encapsulated colored ink 19b'' penetrates into the paper.Therefore, even if the recorded image 19b is peeled off, the colored ink 19b remains intact. ' remains on the recording paper, making it possible to prevent tampering.

Although an example in which a thermal head is used as a heat source for thermal transfer recording has been described above, it is easy to understand that the present invention can be implemented similarly when using other heat sources such as laser light.

[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.

Ink A obtained by evaporating the water in Ink A had a solid content starting temperature of 95° C. Inks for the primary and second ink layers were prepared in the following order.

First, 2 parts of blue dye was dissolved and dispersed in 10 ifB of olive oil to obtain a colored penetrating ink.

9 parts of this ink is 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 is dispersed in 30 parts of a 10% aqueous gum arabic solution. 82
Add 140 parts of 40°C hot water while stirring, and adjust the pH to 4-4.3 while dropping 10% acetic acid. This liquid was heated at 5℃.
Cool, add 1 part of 30% formalin aqueous solution, then add 10%
% Na0ll aqueous solution was added dropwise to control 911 of the system to 9. Next, the system is heated to 50°C to obtain a microcapsule dispersion. This capsule dispersion was centrifuged and dried to obtain n-color ink-containing microcapsules. The average particle size was 3 pots.

Formulation B (solid content: 40%) 40 parts of colored ink-containing microcapsules The components of the above formulation were mixed to obtain coating T liquid B for the second ink layer. This coating solution B was applied to a polyethylene terephthalate film (hereinafter referred to as P).
It was applied to a thickness of 101L on ET film (ET film), and then layered with a dry test paper and bonded for 1 second under a pressure of 1kg/cs on a thermally inclined plate (Kofler Hot Bench), resulting in an adhesive temperature of 78. It was found that the adhesive bonded at temperatures above ℃.Also, when bonded under the same conditions at 90℃, the tensile strength was 18
The peel strength at 0°C was 180g725/-, 1.
5 # Apply ink A on the LPET film with an applicator and dry at 50°C for 5 minutes to evaporate the wood to obtain a first ink layer with a thickness of 4 bars. Next, apply ink B on the first ink layer in the same manner. was coated with an applicator and dried at 50° C. for 5 minutes to obtain a second ink layer with a thickness of 4 to complete a thermal transfer material CI).

Comparative Example A thermal transfer material (n) was completed in the same manner as in the example except that the colored ink-containing microcapsules were not blended into the second ink layer. Thermal transfer material (I) thus obtained,
(II) using a serial type thermal head (resistance value 68 Ω, pulse width 1.1 sec, applied voltage 6.
Printing was carried out on paper having a Beck slippage of 12 seconds with an applied voltage of 5 V), and in the example, the paper was passed between fixing rolls at a pressure of 5 kg/cm2. The printing evaluation and fixing evaluation at that time are shown in the table below.

Table note) The print density and hollow prints are based on the obtained print “I”.
Measure the vertical M part of `` with a microdensitometer (manufactured by Konishiroku Photo Industry Co., Ltd.).
Under the conditions, take the average f1 of A1 measured in the lateral direction three times. In the chart obtained in this case, the convex peak 1~
For each total value of the height of the third highest peak, the values obtained by measuring and calculating three different portions 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 a NoS 10 eraser manufactured by Lion Co., Ltd. was applied with a load of 500 g/cm'' and the print was moved back and forth over the print.

As described above, the thermal transfer recording method of the present invention can produce good prints with high print density, no blurring, no blurring, and few hollow holes, can be easily corrected, and is highly tamper-proof. It is very effective because it allows

[Brief explanation of the drawing]

ic; a is a schematic cross-sectional view of a thermal transfer material used in the thermal transfer recording method of the present invention, and FIG. 2 is a bond paper (Heck smoothness 1).
2 seconds), the cross-sectional curve measured using a stylus meter, 3rd
The figure shows 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. , 5UA is a schematic sectional view before transfer when thermal transfer is performed using the thermal transfer material used in the present invention, and FIG. 6 is a schematic sectional view when heat is applied to the hA thermal transfer material used in the present invention. Figure 7 shows the heat-sensitive transfer material used in the present invention and the recording medium. □Schematic cross-sectional view after 1 separation,
FIG. 8 is a schematic cross-sectional view showing the thermal transfer recording method of the present invention. 11...Thermal transfer material, 12...Support, 13...-
Thermal transferable ink layer, 16--Recording medium, 18--Platen, 17--Thermal oven. Agent Patent Attorney Minoru Yamashita Child 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 5 One comment 17 Figure 6 Figure 7 Figure 8 and Ua

Claims (1)

[Claims] On the support, from the support side, the first
an ink layer and a second ink layer that exhibits adhesive properties when heated, and at least the second ink layer contains microcapsules containing a colorant and an oil agent that is liquid or semi-solid at room temperature. The heat-sensitive transfer material is superimposed on the recording medium and heat is applied from the support side to form a visible image by transfer, and then heat and/or pressure is applied to the visible image to contain it in the at least second ink layer. A thermal transfer recording method characterized by destroying microcapsules contained in the liquid and allowing the inclusions to permeate into a recording medium for fixation.