JP2648617B2 - Transfer recording medium - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sublimation transfer recording medium for image formation which can be used for a printer, a copying machine, a facsimile, and the like.

[Conventional technology]

In recent years, there has been an increasing demand for a recording method suitable for an information processing system, and a sublimation transfer type recording method in which a recording medium carrying a sublimable dye is brought into close contact with a paper to be transferred and heated by a thermal head to perform recording is becoming increasingly popular. It is receiving attention as a method that can achieve image quality.

[Problems to be solved by the invention]

However, the current sublimation recording method has the following disadvantages in some cases.

(1) In the case of full-color recording, if different colors are recorded in a sequential manner, a large amount of expensive sublimable dyes will be consumed and the cost will be extremely high. Further, it is necessary to use a complicated mechanism for mechanical conveyance. is there. Also, a device such as a facsimile that transmits signals in a line-sequential manner requires a large amount of memory.

(2) Since a large amount of energy for sublimation is applied only by the thermal head, the printing speed is slow, the heat storage correction is complicated, and the life of the thermal head is short.

The present invention has been made in view of the above problems, and its object is to reduce the amount of expensive sublimation dye used, reduce costs, can be easily used for facsimile, etc., and have a high printing speed, and heat storage correction. An object of the present invention is to provide a transfer recording medium which is simple and easy to mechanically transport.

[Means for solving the problem]

The object of the present invention is to provide, on a support, a microcapsule comprising an external phase which is cured by the application of light energy and heat energy, and an internal phase containing at least a sublimable dye having a sublimation start temperature of 200 ° C. or lower. This can be achieved by a transfer recording medium characterized by having

 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the transfer recording medium of the present invention and a recording method using the same.

In this embodiment, the transfer recording medium 1 includes a support 1b
The recording layer 1a, which is a distribution layer of the microcapsules 31, is provided on the recording layer 1a. The microcapsules 31 include an external phase curable by a contained sensitive component and an internal phase covered by the external phase.

The transfer recording medium of the present invention is characterized in that the sublimation amount of the sublimable dye contained in the internal phase during transfer is controlled by curing the external phase. Hereinafter, two embodiments (a) and (b) of the sensitive component of the external phase will be exemplified, and the reason why the sublimation amount can be controlled in each embodiment will be described.

(A) When the sensitive component of the external phase contains a monomer having a low molecular weight, if pressure and heat are applied in the transfer step, the uncured external layer melts, exposing the internal phase containing the sublimable dye. On the other hand, the sublimable dye contained in the cured external phase is not exposed, and the amount of sublimation is greatly reduced.

(B) When the sensitive component of the external phase is formed of a relatively high molecular weight prepolymer or polymer, if pressure and heat are applied in the transfer step, the uncured external phase is softened by the heating and is not broken. However, the hardened external phase is broken by the above-mentioned pressurization because its glass transition point is raised and it becomes brittle. Sublimation dyes in capsules that have a broken external phase or an external phase with many broken sites are more easily sublimated.

As described above, an image can be formed by the difference in the sublimation amount of the dye from the microcapsules having the cured external phase and the microcapsules having the non-cured external phase, or by sublimation or non-sublimation.

Hereinafter, a case where light and heat energies are applied as a plurality of energies will be described.

To the recording layer 1a, heat energy modulated according to a recording signal is applied together with light energy of a wavelength selected by a color tone of a sublimable dye contained in an image forming element to be polymerized. "Modulation" refers to changing the position where energy is applied according to the image signal,
“Together” may be the case where light energy and heat energy are applied simultaneously, or the case where light energy and heat energy are applied separately.

For example, in the embodiment shown in FIGS. 1a to 1c, the internal phase of the microcapsule 31 sublimates to exhibit any color tone of cyan (C), magenta (M), and yellow (Y). Contains a sublimable dye. However, the sublimable dye contained in the internal phase is not limited to those exhibiting cyan, magenta, and yellow color tones, and any color sublimable dye may be used depending on the application. If only one type of sublimable dye is used, a monocolor image can be obtained. The microcapsules 31 contain, in addition to the dye, a sensitive component that becomes polymerized when light and heat energy are applied.

In this image forming method, the recording medium 1 of the present invention is superimposed on the thermal head 20 and irradiated with light so as to cover the entire heat generating portion of the thermal head 20. Irradiation light sequentially irradiates those to which the external phase of the microcapsule 31 reacts. For example, when any of the sublimable dyes of cyan, magenta, and yellow is contained in the internal phase of the microcapsule 31, the wavelength λ (c), λ
Ultraviolet light corresponding to (M) and λ (Y) color information is sequentially irradiated.

That is, first, as shown in FIG. 1a, light of a wavelength λ (Y) is irradiated from the recording phase 1a side of the recording medium 1 and, for example, the heating elements 20b, 20d, 20e and 20f of the thermal head 20 generate heat. Then, of the microcapsules 31 containing the yellow sublimable dye in the internal phase, heat and wavelength λ (Y)
The external phase of the microcapsule 31 to which both of the above-mentioned lights have been added (the hatched portion in FIG. 1a; the microcapsules in which the external phase is hardened is indicated by hatching) is hardened.

Next, as shown in FIG. 1b, the recording layer 1a is irradiated with light having a wavelength of λ (M), and the heating resistors 20a, 20e, and 20f are heated to contain a magenta sublimable dye in the internal phase. Heat and wavelength λ (M) of the external phase of the microcapsule 31
The external phase of the microcapsule 31 to which the light is applied is hardened. Further, as shown in FIG. 1c, when the light having the wavelength λ (C) is irradiated and the desired heating resistor is heated, the external phase of the microcapsule 31 to which the light and the heat are applied is hardened, Microcapsules whose external phase has not hardened
A recording image is formed on the recording layer 1a by 31. This recording image is transferred to the non-recording medium 8 in the next transfer step.

In the transfer step, the recording medium on which the recording image is formed is brought into close proximity to the recording medium, and is heated from the recording medium or the recording medium side to selectively transfer the sublimable dye contained in the internal phase to the recording medium. Form an image. Therefore, the heating temperature at this time is determined so that only the sublimable dye in the recorded image is selectively sublimated.

In the embodiment described above with reference to FIGS. 1a to 1c, a method of forming an image by irradiating light to the entire area of the thermal head 20 and selectively heating the heating elements of the thermal head 20 has been described. By uniformly heating a certain portion of the medium (in the case of the thermal head 20 shown in FIG. 1a, when all the heating elements are heated) and selectively performing light irradiation, a multicolor image can be similarly formed. Can be formed. That is, light energy of a wavelength selected by a sublimable dye modulated by a recording signal and contained in the internal phase of the microcapsule whose external phase is to be polymerized is applied together with the thermal energy.

Explaining in the example shown in FIG. 1a, the heating resistors 20b, 20d,
Instead of heating 20e and 20f, use a thermal head 20
Heats the entire body uniformly, and irradiates light having a wavelength λ (Y) to positions corresponding to the heating resistors 20b, 20d, 20e and 20f.
When irradiating light of wavelength λ (M), the thermal head 20
The whole is heated, and light is irradiated to positions corresponding to the heating resistors 20a, 20e and 20f. The same applies to the case of irradiating light of wavelength λ (C).

In the above description, the thermal head is used as a unit for uniformly heating the whole for convenience, but a uniform heating unit such as a heat roll or a heating plate may be used.

As the sublimable dye used in the present invention, for example, known dyes selected from disperse dyes represented by anthraquinone-based compounds and azo-based compounds, and basic dyes represented by ion-drainine-based compounds and leukophenoxazine-based compounds, and the like. Sublimable dyes and the like can be used. In the present invention, a sublimable dye having a sublimation initiation temperature of 200 ° C. or lower is used. Specifically, for example, Kayaset Yellow AG, Kayaset Red B, Kayaset Blue 906 (all manufactured by Nippon Kayaku Co., Ltd.
(Brand name), Resilen Yellow TGL, Ceres Blue GN, Resilen Red TB, Resorin Yellow GRN (above, manufactured by Bayer AG, trade name), Dyanix Yellow 6G-SE, Dyanix Brilliant Yellow 5E-E, Dynix Scarlet 3R-FE, Dianix Scarlet
PTB-67 (Mitsubishi Kasei Corp., trade name), Miketone Yellow 5G, Miketone Red BSF, Miketone Blue FTK
(Mitsui Toatsu Co., Ltd., trade name), Sumicaron Yellow E-4GL, Sumicaron Red FBGL, Sumicaron Blue E-GRL, and the like.

Further, the internal phase of the microcapsule may contain a binder if necessary. As the binder, a commonly used polymer compound or wax is used. For example, as the high molecular compound, butyral resin, acrylic resin, polyester resin, polyamide resin, polyurethane resin, polyvinyl chloride, polystyrene and the like are used. Examples of wax binders include plant waxes such as candelilla wax, carnauba wax, and rice wax; animal waxes such as beeswax and whale wax; mineral waxes such as ceresin and montan wax; and petroleum waxes such as paraffin wax. Synthetic waxes composed of polyethylene wax, sasol wax, montan wax derivatives, paraffin wax derivatives, hardened castor oil, hardened castor oil derivatives, fatty acids such as stearic acid, fatty acid amides and esters. In the present invention, these waxes may be used alone or in combination of two or more.

The external phase of the microcapsule of the present invention contains at least a photopolymerization initiator, a monomer, an oligomer or a polymer having an unsaturated double bond, and if necessary, a binder (binder), a thermal polymerization inhibitor, a plasticizer, An additive such as a surface smoothing agent can be contained.

Examples of the photopolymerization initiator used in the present invention include carbonyl compounds, halogen compounds, azo compounds, organic sulfur compounds and the like, for example, aromatic ketones such as acetophenone, benzophenone, coumarin, xanthone, thioxanthone, chalcone and styrylstyryl ketone. And its derivatives /, diketones such as benzyl, acenaphrenequinone, camphorquinone and derivatives thereof / halogen compounds such as anthraquinonesulfonyl chloride, quinoline sulfonyl chloride, 2,4,6-tris (trichloromethyl) -S-triazine / And so on,
The present invention is not limited to this.

Further, when multicolor recording is performed using the transfer recording medium of the present invention, a light whose reaction speed changes rapidly at different wavelengths according to the color of the sublimable dye contained in the internal phase of the microcapsule. What is necessary is just to make a polymerization initiator contain in the external phase of a microcapsule. As such a combination of photopolymerization initiators, for example, the following combinations can be used.

The maximum sensitivity of a photopolymerization initiator using a combination of the above and an S-triazine having a trihalomethyl group is about 430 to 500 nm.

The photopolymerization initiator using tertiary amines and the like in combination has a maximum sensitivity of about 370 to 400 nm.

Further The photopolymerization initiator using the tertiary amines and the like in combination has a maximum sensitivity of about 300 to 350 nm.

As described above, by changing the maximum sensitivity wavelength range of the photopolymerization initiator to be used, the image forming element can have wavelength selectivity. Therefore, if the above-mentioned photopolymerization initiator is used, color separation of three colors becomes possible. Furthermore, development to full-color recording becomes possible. Further, in the present invention, by using a compound having a large absorption in the ultraviolet to visible regions such as an ultraviolet absorber together with a photopolymerization initiator, the photosensitive wavelength range of the photopolymerization initiator is narrowed, and the spectral property of the photopolymerization initiator is reduced. It is also possible to raise.

Examples of the monomer, oligomer or polymer having an unsaturated double bond used in the present invention include polyisocyanates and alcohols and amines containing unsaturated double bonds (which may be reacted with polyols if necessary). Urethane acrylates or urethane methacrylates synthesized by a polyaddition reaction with an epoxy resin, epoxy acrylates / or polyester acrylates, spinachacrylates synthesized by an addition reaction of an epoxy resin with acrylic acid or methacrylic acid,
Examples thereof include polyether acrylates, but the present invention is not limited to these.

The polymer has a skeleton of a polyalkyl, polyether, polyester, polyurethane or the like in a main chain, and an acryl group, a methacryl group, a cinnamoyl group, a cinnamylidene acetyl group, a furyl acryloyl group, a cinnamic acid ester in a side chain. Examples thereof include those into which a polymerizable or crosslinkable reactive group is introduced, but the present invention is not limited thereto.

The above-mentioned monomers, oligomers and polymers are preferably semi-solid or solid at room temperature,
Any liquid may be used as long as it maintains a semi-solid or solid state by mixing with a binder described below.

The above-mentioned monomer, oligomer or polymer having an unsaturated double bond and the photopolymerization initiator may be used in combination with a binder. Any binder may be used as long as it is an organic high molecular polymer compatible with a monomer, oligomer or polymer having an unsaturated double bond. As such organic high-molecular polymers, polymethyl acrylate, polyacrylic acid alkyl esters such as polyethyl acrylate, polymethyl methacrylate,
Polymethyl methacrylates such as polyethyl methacrylate, or methacrylic acid copolymers, acrylic acid copolymers, maleic acid copolymers / or chlorinated polyethylene, chlorinated polyolefins such as chlorinated polypropylene, polyvinyl chloride, Polyvinylidene chloride, polyacrylonitrile or a copolymer thereof, further includes polyvinyl alkyl ether, polyethylene, polypropylene, polystyrene, polyamide, polyurethane, chlorinated rubber, cellulose derivative, polyvinyl alcohol, polyvinyl pyrrolidone, etc. However, the present invention is not limited to this. These binders may be used alone or as a mixture of two or more at an appropriate ratio.

The support used in the recording medium of the present invention is not particularly limited, and a conventionally known support can be used as it is. For example, as a support, polyester, polycarbonate, triacetyl cellulose, nylon,
Examples include polyimide.

Hereinafter, a method for producing the transfer recording medium of the present invention will be described.

Generally used sublimable dyes are dissolved in commonly used organic solvents such as ketones, esters, ethers, halogenated hydrocarbons and aromatics, and sensitive components are also often dissolved in the above solvents.

Therefore, the microcapsule manufacturing method used for the recording medium of the present invention may not be able to use a coacervation method, an in situ polymerization method, or the like, which has been used for manufacturing a conventional microcapsule. As a method for manufacturing the recording medium of the present invention, for example, methods (1), (2),
(3) can be used.

(1) A sublimable dye and a binder are dissolved in a solvent and dispersed in, for example, water containing a surfactant, and then the solvent is removed by evaporation to obtain fine particles of an internal phase having a main particle size of 2 to 50 µm. On the other hand, at least a photopolymerization initiator, a monomer, and a prepolymer are dissolved in a solvent, dispersed in a water-soluble polymer such as PVA until the main particle size becomes equal to or smaller than the internal phase, and the fine particles of the internal phase are added. Thus, after the external phase is arranged outside the internal phase, the solvent is dried and applied to the support as it is. In addition, the main particle size means a particle size showing a peak value of the particle size distribution, and the main particle size can be obtained from a number distribution measured by a Coulter counter.

(3) Dissolve the internal phase component and the external phase component in a solvent, respectively, and disperse and dry to obtain internal phase particles and external phase particles having a main particle size equal to or smaller than the internal phase. The external phase is applied to the internal phase external wall by a mechanochemical method. Let me arrange.

(3) After dispersing and drying the internal phase by the above method, a water-soluble polymer thin film is formed by a conventional complex coacervation method and spray drying method, and then dispersed in a solution in which the external phase is dissolved. It is dried by a spray drying method or the like, and the external phase is disposed on the internal phase wall.

The microcapsules and the transfer recording medium used for the point difference recording medium of the present invention can be produced by the above method, but the means for producing the recording medium of the present invention is not limited to these.

Examples of the method for supporting the microcapsules on a support include a method in which the microcapsules are dispersed in a polymer solution such as PVA and coated on the support, and a method in which the microcapsules are chemically or electrostatically bonded with a binder or the like. After supporting on a support, and then coating with a PET film, an aramid film, a PPS film, or the like.

〔The invention's effect〕

In the image forming method using the transfer recording medium of the present invention, the application of energy for forming a recorded image and the application of energy for sublimation are functionally separated. For this reason, compared with the conventional recording method in which the signalized energy for forming the transfer image must be used as the energy for transfer at the same time, the image forming method using the transfer recording medium of the present invention has a higher transfer energy. Need not be delicately controlled, and the conditions for applying energy are eased.
For example, the energy for sublimation may be a non-signalized uniform energy. Therefore, if the transfer recording medium of the present invention is used, the printing speed can be increased,
High-speed recording can be easily realized.

Further, in the thermal head used in the conventional thermal transfer recording apparatus, even the one having the fastest thermal response speed is 1 to 5 m.
sec., and if it is attempted to drive at a repetition cycle faster than that, the temperature rise and fall cannot be performed sufficiently within one cycle, and the effect of heat storage will not occur due to insufficient heating or conversely the temperature will not fall. Appears in image quality. This was one of the biggest factors that hindered the speeding up. However, like the transfer recording medium of the present invention, a heat signal and other energy (light) were used for image formation.
Can be used to change the physical properties that govern transfer characteristics only when light is irradiating, even if the thermal head accumulates heat. Even if a head is used, a recording operation can be performed with a shorter repetition period. Therefore, according to the present invention, high-speed recording is facilitated.

According to the image forming method using the transfer recording medium of the present invention, a full-color image can be recorded line-sequentially by sequentially changing the position information of the image and the color information by light using a heating means such as a thermal head. For this reason, not only can the cost of consumables for the recording medium be significantly reduced, but also if it is used for a facsimile or the like in which signals are sent in a line-sequential manner, the memory cost can be reduced.

〔Example〕

 Hereinafter, the present invention will be described in more detail with reference to examples.

Example 1 30 g of the components shown in Table 1 (internal phase components) were dissolved in 70 g of chloroform, mixed with 500 ml of water in which a surfactant having a HLB value of at least 10 such as a cation or a nonion was dissolved, and heated at 60 ° C. The mixture was emulsified at 3,000 to 3,500 rpm with a homomixer under heating, and further stirred for 30 minutes while heating at 60 ° C., followed by filtration and drying to prepare internal phase particles having a main particle size of 10 μm.

At the same time, all of the components (external phase components) shown in Table 2 were prepared in the same manner as in the above-mentioned internal phase particle preparation method except that the rotation speed of the homomixer was changed from 8000 to 8500 rpm.
μm external phase particles were prepared.

Next, equal amounts of the internal phase particles and the external phase particles produced as described above were mixed, charged into a Henschel mixer, and treated at 1500 rpm for 10 minutes to produce microcapsules.

Then, a 6 μm thick PET film was coated with a urethane-based adhesive (HYD RAN Hw-, trade name, manufactured by Dainippon Ink and Chemicals, Inc.).
After applying 311) at a thickness of 1 μm, the microcapsules were attached to the adhesive surface. Further, an aramid film having a thickness of 2 μm (Toray Industries, Inc.) was brought into close contact with the surface of the attached microcapsule, wound, and then left in nitrogen for 1 hour to produce a recording medium of the present invention.

FIG. 2 is a partial sectional view showing the transfer recording medium of the present embodiment obtained as described above. This transfer recording medium 1
A microcapsule 1a is adhered on a PET film (support) 1b by a urethane-based adhesive 1c, and an aramid film 1d (a protective sheet and does not allow oxygen that inhibits the reaction to pass therethrough) is formed on the microcapsule 1a layer. )) Are in close contact with each other.

The transfer recording medium of this example obtained as described above was mounted on the image forming apparatus shown in FIG.

FIG. 3 is a schematic diagram showing an example of an apparatus for forming an image using the recording medium of the present invention. This device is
It is mainly composed of a transfer image forming section and a transfer section, and the transfer image forming section includes fluorescent lamps 3a, 3b,
3c and the thermal head 2, and the transfer section has a heating roll 7 and a pressure roll 6. The thermal head 2 in this apparatus is 8 bits / min, and the fluorescent lamps 3a, 3b and 3c are 40 W fluorescent lamps having peak wavelengths of 335 nm, 390 nm and 450 nm, respectively, as shown in FIG.

First, the recording medium 1 wound around the supply roll is conveyed to the transfer section, and the desired position of the recording medium 1 is heated by the thermal head 2 and irradiated by the fluorescent lamp 3b at the timing shown in FIG. To form a transferred image.

Next, the aramid film (protective sheet) 1d of the recording medium 1 on which the transferred image has been formed is peeled off by the peeling roll 4, and subsequently conveyed to the transfer unit, and simultaneously with the synthetic paper (Fuji Chemical Industries, Ltd.) conveyed to the transfer unit. 5) and heated and pressed (25 kg / cm ² ) by a heating roll 7 and a pressure roll 6 having a surface temperature of 150 ° C.

Next, the synthetic paper 5 was peeled off, and the recording medium 1 was taken up on a take-up roll 8. As a result, a good blue recorded image was formed on the recording medium 1.

In the above-described method, image formation was performed in the same manner as described above except that the condition of the drive pulse width of the thermal head 2 was changed within the range of 0 to 20 msec. The drive pulse width (20−τ) And the density of the recorded image showed a relationship as shown in FIG. The density of the recorded image is OD
(Optical density) value. From the results, it is understood that good density gradation can be realized by changing the drive pulse width.

Example 2 The components (internal phase components) shown in Tables 1 and 3 were each made in the same manner as in Example 1, except that the dominant particle size of double different colors was 10 μm.
m internal phase particles, and the double internal phase particles
The present invention was carried out in exactly the same manner as in Example 1 except that the microcapsules were formed with the two kinds of external phase particles prepared in the same manner as in Example 1 except for the components (external phase components) shown in Tables and Table 4. A transfer recording medium was manufactured.

Next, using the transfer recording medium, the thermal head 2
The image formation was performed by the apparatus shown in FIG. 3 in exactly the same manner as in Example 1 except that the heating in step 1 and the light irradiation with the fluorescent lamps 3a, 3b, 3c were performed at the timing shown in FIG.
A good recorded image composed of cyan, magenta, and blue was formed on the recording medium.

Example 3 Internal phase particles having a main particle size of 4 μm in three different colors were produced in the same manner as in Example 1 except that the components (internal phase components) shown in Tables 1, 3 and 5 were used.

Next, the three kinds of internal phase particles were dispersed in a 2% by weight aqueous solution of PVA (▲ = 800, manufactured by Kishida Chemical Co., Ltd.), dried by spray drying, and coated with PVA. I got

Next, among the three kinds of internal phase particles coated on the PVA, the internal phase particles composed of the components shown in Table 1 were dispersed in a 20% by weight solution of the components (external phase components) shown in Table 2 in chloroform. The external phase component was coated on the internal phase particles by a spray drying method to produce microcapsules.

At the same time, in the same manner as the above method, the internal phase particles composed of the components shown in Table 3 were replaced with the components (external phase components) shown in Table 4 and the internal phase particles composed of the components shown in Table 5 were replaced with the sixth.
Microcapsules were prepared by coating with the components (external phase components) shown in the table.

The three types of microcapsules obtained as described above (each having an internal phase exhibiting a different color and having an external phase containing a photopolymerization initiator in a different photosensitive wavelength region) were mixed in an equal amount, and the mixture was mixed. In the same manner as in Example 1, a transfer recording medium of the present invention was produced.

Next, using the transfer recording medium, the thermal head 2
The image formation was carried out by the apparatus shown in FIG. 3 in exactly the same manner as in Example 1 except that the heating in Step 1 and the light irradiation by the fluorescent lamps 3a, 3b and 3c were performed at the timing shown in FIG. A good full-color recorded image was formed on the medium.

Example 4 Internal phase particles having a main particle size of 10 μm were produced in exactly the same manner as in Example 1 except for the components (internal phase components) shown in Table 1.

Next, 50 g of the components shown in Table 7 were dissolved in chloroform at a concentration of 20% by weight, and PVA (manufactured by Kishida Chemical Co., Ltd.)
(主体 = 800) in 300 ml of a 15% by weight aqueous solution of
The emulsion was emulsified to about 5 μm. In this emulsified solution,
A dispersion in which 50 g of the internal phase particles were dispersed in 150 ml of water was added, and the mixture was stirred at a temperature of 60 ° C. for 3 hours.

Next, 1 water was added, and the mixture was allowed to stand for 12 hours. The supernatant was removed to obtain a PVA solution of microcapsules.
This was applied on a PET film with an applicator and dried to produce a transfer recording medium of the present invention as shown in FIG.

Next, using the transfer recording medium, the thermal head 2
The image formation was performed by the apparatus shown in FIG. 3 in exactly the same manner as in Example 1 except that the heating in Example 1 and the light irradiation by the fluorescent lamps 3a, 3b and 3c were performed at the timing shown in FIG. A good recorded image of cyan was formed on the medium.

[Brief description of the drawings]

1a to 1c are partial views for explaining an example of an image forming method using the transfer recording medium of the present invention, and FIG. 2 is a partial view showing the transfer recording medium manufactured in Examples 1 to 3. FIG. 3 is a schematic view showing the image forming apparatus used in Examples 1 to 4, and FIGS. 4, 6, and 7 are Examples 1 and 2, respectively.
FIGS. 5A and 5B are timing charts of a fluorescent lamp and a thermal head at the time of image formation in FIGS. 3 and 3. FIG. 5 is a diagram showing a drive pulse width of the thermal head at the time of image formation and a density of an obtained recorded image in the first embodiment. FIG. 8 is a partial view showing the transfer recording medium prepared in Example 4, and FIG. 9 is a photopolymerization initiator which is one of the external phase components used in Examples 1 to 4. FIG. 10 is a diagram showing an emission spectrum of a fluorescent lamp of the image forming apparatus used in Examples 1 to 4. DESCRIPTION OF SYMBOLS 1 ... Transfer recording medium, 31 ... Microcapsule, 1a ... Recording layer, 1b ... Support 1c ... Binder layer 1d ... Overcoat film 2 ... Thermal head, 3a, 3b, 3c ... Fluorescent lamp 4 Peeling roll 5 Transfer paper (synthetic paper) 6 Pressure roll 7 Heating roll 8 Winding roll

Claims (2)

(57) [Claims] 1. A support having microcapsules comprising an external phase which is cured by application of light energy and heat energy and an internal phase containing at least a sublimable dye having a sublimation initiation temperature of 200 ° C. or less. And a transfer recording medium. 2. The transfer recording medium according to claim 1, wherein a plurality of types of microcapsules whose external phases are sensitive to light in different wavelength ranges are provided on said support.