JPS6374694A - Body to be recorded in sublimation-type thermal transfer recording method - Google Patents

Abstract

PURPOSE:To enable easy and high-density dyeing under low-energy conditions with a sublimating dispersion dye, by a method wherein a composition prepared by compounding a specific surface-active agent and a polyester compound of aromatic polyvalent carboxylic acid in specific amounts with a polyester resin and a crosslinker of specific ratios is coated on the surface of a substrate to be cured by an activation energy ray. CONSTITUTION:In order to form a body to be recorded, a composition formed by compunding 100 parts by weight of a mixture consisting of 40-95 wt% of a polyester resin and 60-5 wt% of a crosslinker capable of curing by an activation energy ray, 0.01-10 parts by weight of at least one selected from among silicone surface-active agents and fluorine surface-active agents, and 0.1-30 parts by weight of a polyester compound of aromatic polyvalent carboxylic acid is coated on the surface of a substrate to be cured by the activation energy ray. As the polyester resin, a linear polyester resin of 1% or less crystallinity obtained by the polycondensation of two or more sorts of dicarboxylic acids and two or more sorts of diols is preferably used for enhancing solubility to organic solvent, ease of dyeing, and resistance to light.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording medium in a sublimation type thermal transfer recording system.

E. Prior Art] With the recent rapid spread of office automation, the use of color displays in the core PCs, word processors, office computers, etc. has rapidly increased, and there has been a rapid demand for the practical implementation of recording methods from color signals. There is also a strong demand for color in the field of dry copying machines.

Conventional color recording methods include a light pen method, a wire dot method, and an inkjet method, but each method has drawbacks such as slow recording speed, noise, and clogging of the tiny nozzles that eject ink. On the other hand, the dye-sublimation heat-sensitive transfer recording method does not generate any sound and is easy to operate, maintain, and operate the copying machine.
It has characteristics such as easy management. In addition, in one method, a transfer sheet coated with a sublimable dye is heated with a thermal recording head to sublimate and transfer the dye to the recording medium to obtain color recording, so the energy applied to the thermal head is adjusted. By doing so, it is possible to control the progression of the dye, making it easy to express gradations, and this method is particularly advantageous in obtaining full-color hard copies compared to other recording methods.

For this reason, JP-A-60-81359, JP-A-60-112
No. 493 and the like propose recording materials that can be used in sublimation type thermal transfer recording methods, but these are articles that can be dyed with sublimable cationic dyes and lack stability against light. For this reason, there has been a demand for the development of a recording material that can be dyed with a pigment disperse dye that has good light resistance.

[Problems to be Solved by the Invention] The object of the present invention is to provide a disperse dye dry transfer method that can be easily dyed with a disperse dye under low energy conditions in a sublimation type thermal transfer recording system and has excellent color development and clarity. The objective is to provide a recording medium.

As a result of extensive studies, the present inventors applied active energy rays by coating a composition comprising a specific ratio of a polyester resin and a crosslinking agent, a specific surfactant, and a specific amount of a polyester compound of aromatic polycarboxylic acid. The present inventors have discovered that the recording material obtained by curing with a sublimable disperse dye can be easily dyed under low energy conditions and dyed with high density, and the present invention has been completed.

[Means for solving the problem] In other words, the wooden base 1 has a polyester resin 4 on the surface of the base.
At least one type selected from silicone surfactants and fluorine surfactants is added to 100 parts by weight of a mixture consisting of 0 to 95'gL amount % and 60 to 5 weight % of a crosslinking agent that can be cured by active energy rays. .01 to 10 parts by weight, and 0.1 to 3 parts by weight of an aromatic polycarboxylic acid polyester compound
0 parts by weight. Sublimation y obtained by coating 1llffl material and curing it with active energy rays! l It is a recording medium for thermal transfer recording method.

The present invention will be explained in detail below.

According to the present invention, the polyester resin used in the composition applied to the substrate surface is well stained by sublimable disperse dyes and functions as a binder for the composition, which is necessary for the present invention. It is essential.

The polyester resin is a linear thermoplastic polyester resin obtained by the condensation polymerization of a dicarboxylic acid and a diol, or/and a linear thermoplastic polyester resin obtained by the condensation polymerization of an unsaturated polybasic acid having a reactive double bond and a polyhydric alcohol. Among them, unsaturated polyester resins having a molecular Bzooo to 40,000 obtained by condensation polymerization of two or more dicarboxylic acids and two or more diols are preferred, and the crystallinity is 1. % or less, the polyester resin has solubility in organic solvents and ease of dyeing,
and more preferable in terms of good light resistance.

The amount of polyester resin in the mixture with the crosslinking agent is 40
~95% by weight is preferable; if it is less than 40% by weight, the dyeing density with the sublimable disperse dye will not become deep under low energy conditions; on the other hand, if the polyester resin blend exceeds 95% by weight, the amount of crosslinking agent will decrease, The non-blocking property with the color sheet (transfer paper) coated with a sublimable disperse dye was poor, and the product and color sheet were coated with a 5'4 dyeable disperse dye composition and cured with active energy rays. causes blocking (sticking) during thermal transfer, and is more preferably in the range of 55% to 93% by weight.

Specific examples of linear thermoplastic polyester resins obtained by condensation polymerization of two or more dicarboxylic acids and two or more diols include polyester resins obtained from terephthalic acid/isophthalic acid/ethylene glycol/neopentyl glycol. , other terephthalic acid/isophthalic iv/
Ethylene glycol/bisphenol A-ethyleneoxy F +t additive, terephthalic acid/isophthalic acid/ethylene glycol/l, 6-hexanediol, terephthalic acid/isophthalic acid/sebacic acid/ethylene glycol/neopentyl glycol, terephthalic acid/sebacic acid Examples include polyester resins obtained from /ethylene glycol/neopentyl glycol, terephthalic acid/isophthalic acid/adipic acid/ethylene glycol/neopentyl glycol, and two or more types can also be used in combination. In addition, esterified dimethyl terephthalate, instead of terephthalic acid, isophthalic acid, etc.
Of course, it is also possible to use dimethyl isophthalate or the like as a raw material for Mff<.

11i of unsaturated polybasic acid and polyhydric alcohol with reactive double bonds! Examples of the unsaturated polyester resin obtained by polymerization include maleic anhydride m/phthalic anhydride/propylene glycol, maleic anhydride/inphthalic anhydride/inphthalic anhydride/
Propylene glycol, maleic acid/fumaric acid/isophthalic acid/1,3-butanediol, maleic acid/isophthalic acid/neopentyl glycol, maleic anhydride/
Examples include resins obtained from scorched water tetrahydrophthalic acid/dipropylene glycol.

The crosslinking agent is necessary to cure the composition to be coated with active energy rays and to improve the blocking resistance of the composition, and the preferred amount is 5 to 60% by weight of the total amount with the polyester resin. range, more preferably 7 to 4
It is 5% by weight. If the amount of crosslinking agent is less than 5% by weight, blocking tends to occur, whereas if it exceeds 60% by weight, blocking resistance will be good, but the proportion of polyester resin will decrease and sufficient dyeing density will not be obtained. It becomes difficult.

Considering the curing of the composition by the crosslinking agent and the blocking resistance of the composition, it is preferable that the crosslinking agent has at least one type of polyfunctional heptamine. When using these crosslinking agents, the polymerizable group of these crosslinking agents is preferably a hexamer having an acryloyloxy group or a methacryloyloxy group.

Examples of hexamers having a (meth)acryloyloxy group include polyether acrylate or polyether methacrylate (hereinafter, "acrylate or methacrylate" will be abbreviated as "(meth)acrylate"), polyester (meth) Seven types of acrylates, polyol (meth)acrylates, epoxy (meth)acrylates, amide urethane (meth)acrylates, urethane (meth)acrylates, spiroacetal (meth)acrylates, and polybutadiene (meth)acrylates. -, oligomers can be mentioned.

Specific examples of such monomers or oligomers include 1, 2. B-Polyether (meth)acrylate synthesized from hexanetriol/propylene oxide/acrylic acid, trimethylolpropane/propylene oxide/acrylic acid; adipic acid/l, 6-hexanediol/acrylic acid, succinic acid/trimethylolethane /
Polyester (meth)acrylates synthesized from acrylic acid, etc.; triethylene glycol diacrylate, hexapropylene glycol diacrylate, neopentyl glycol diacrylate, 1,4-butanediol dimethacrylate, 2-ethylhexyl acrylate,
Tetrahydrofurfuryl acrylate, 2-hydroxyethyl methacrylate, ethylcarpitol acrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, 2,2-bis(4-7 kryloyl) oxydiethoxyphenyl)propane, 2,2-bis(4
(meth)acrylate or polyol (meth)acrylate such as -acryloyloxypropoxyphenyl)propane: diglycidyl etherified bisphenol A/acrylic acid, diglycidyl etherified polybisphenol A/acrylic acid.

Triglycidyl etherified glycerin/epoxy (meth)acrylate such as acrylic acid; γ-butyrolactone/
N-methylethanolamine/bis(4-isocyanatocyclohexyl)methane/2-hydroxyethyl acrylate, γ-butyrolactone/N-methylethanolamine/2,8-tolylene diisocyanate/tetraethylene glycol/2-hydroxyethyl acrylate, etc. amide urethane (meth)acrylate, 2.8-
) Urethane acrylates such as lylene diisocyanate diacrylate, inphorone diisocyanate diacrylate, and hexamethylene diisocyanate diacrylate; Spiroacetal acrylate synthesized from diarylidene pentaerythritol/2- and droxyethyl acrylate; Epoxidized butadiene/2 Examples include acrylated polybutadiene synthesized from -hydroxyethyl 7-acrylate, and these polymers and oligomers may be used alone or in a mixture of two or more types.

Among the monomers and oligomers, the following general formula %c is an integer of 1 to 4, and at least 3 Xs are represented by the general formula: C) Iz-CH-COO-Ra- (in the formula
R8 represents a single bond, a polyoxyalkylene group having a fullkylene group having 1 to 8 carbon atoms, or a polyoxyalkylene group having an alkylene group having 1 to 8 carbon atoms, and the remainder is a group having 1 to 8 carbon atoms. Alkyl group, hydroxyl group, ti, amino group, represented by the formula: -(OR9)・-H (in the formula, R9 represents an alkylene group having 1 to 8 carbon atoms, and 1m is a positive integer) Group or formula (OR9)-100
(wherein R9 and m have the same meanings as above), such as dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, tripentaerythritol Erythritol pentaacrylate, tripentaerythritol hexaacrylate, tripentaerythritol heptaacrylate, etc.1
Polybisphenol represented by the following general formula (m) CH3 ... (m) (wherein, n is a positive integer of 1-10, and X is optionally -OH or -0111:0CH-CHz) Type A polyacrylate, for example, diacrylate of diglycidyl etherified bisphenol A, diacrylate of Epicote #1001 (n=3, manufactured by Shell), etc.

The following general formula (IV) CH3 噸... (1'V) (wherein, XI, X2,..., xn are the same or different alkylene groups having 6 or less carbon atoms, or one hydrogen atom of which is a hydroxyl group (n is an integer of θ to 5), such as 2.2-bis(4-acryloyloxyjetoxyphenyl)propane, 2.2-bis(4- Acryloyloxytriethoxyphenyl)propane, 2,2-bis(4-acryloyloxydipropoxyphenyl)propane, and the like.

When ultraviolet rays are used as active energy rays, they have very good quick-drying properties in air, making them particularly preferred crosslinking agents.

The silicone surfactant and/or the fluorine surfactant are essential components in order to prevent blocking with the color sheet (transfer paper) during low energy thermal transfer. In other words, it has been found that in order to obtain a high concentration of color development by sublimable disperse dyes at low energy, it is sufficient to reduce the amount of the crosslinking agent of the present invention, but at the same time, blocking appears significantly. . However, it has been found that by adding at least one selected from a specific silicone surfactant and a fluorine surfactant to this, blocking can be significantly eliminated even if the amount of crosslinking agent is small.

Among silicone surfactants, compounds containing blocks of polydimethylsiloxane and polyoxyalkylene (which may be slightly modified with other functional groups) are effective, and are particularly effective against CH3- in silicone surfactants. (Si
The ratio of O)+12- group and one OR- group (R: alkylene residue) is C)lx-(SiO)+z2-/-OR-=
Those having a ratio of 1/10 to 110.1 are preferable because they are excellent in improving blocking properties and leveling properties when the composition is used as a coating agent, but surprisingly, these silicone surfactants have a high dyeing concentration. It has been found that this method is also effective in improving the properties of the cured composition and the transparency of the cured composition. If a silicone surfactant is not added, the dyeing density may be poor or the cured composition may become white and cloudy. The preferred range of these is 115 to 1
It is in the range of 10.2.

As a specific example of silicone surfactant, general formula (V)
, (VI) C)13 CH3+ 5i-0)r-(P) VI-R+
-(V)CH3 (in the formula, P is +CH2CH20) "1,000CH20HO)y-
Yes.

CH3 m and n are 1.2.3. ..., and X and y are 0, 1, 2, 3, . Represent the number of... and take i1. R1 represents -H, an alkyl group, an acyl group, an aryl group, an acetoxy group, etc.)CH3CH3CH3(-Si-0)a+5i-0)y-R2-(Vl
)CH3Q (in the formula, Q is +CH2)Z -0-(CH2CH20)r
(-GH2CHO)v-1hCH3, where m and n are 1, 2, 3. ... positive! 2! numbers, and X and y are 0, 1, 2, 3 . The number of...

2 represents O or an integer from 1 to 5, Formula 1% R2 represents -S-CHx, -H, an alkyl group, an acyl group, or a CH3 aryl group, R3 represents -H, an alkyl group, an acyl group, or an aryl group group, acetoxy group, etc.
) There are compounds shown by the following, and it is also possible to use two or more of these in combination.

It is possible to easily dye with a sublimable disperse dye by applying the composition described above to the basic surface and curing it, but in order to dye with even higher concentration, it is necessary to add polyester to these compositions. Oxyalkylene concentration 0.1-30
It has been found that it is sufficient to mix parts by weight (based on a total of 100 parts by weight of the polyester resin and crosslinking agent).

Polyesters of aromatic polyhydric carboxylic acids include polyesters such as phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, pyromellitic acid, and natuthalic acid.For example, dimethyl phthalate, diethyl phthalate, dimethyl terephthalate, Examples include diethyl terephthalate, dibutyl isophthalate, trioctyl trimellitate, triethyl trimellitate, and tetramethyl pyromellitate, but aromatic polyvalent Preferably, the carboxylic acid polyester compound is a diester of heptalic acid, isophthalic acid, or terephthalic acid and is solid at room temperature, such as dimethyl terephthalate, diethyl terephthalate, bis-hydroxyethoxyethyl terephthalate, and the like.

In addition, - General formula (I) (where n is a positive integer of 1 to 5, indicates that the bond is at any position of the ortho position, meta position, or para position,
It can be arbitrarily changed depending on n.

R1, R2,...+Rn, l are the same or different alkylene groups. ) Polyester compounds of aromatic polycarboxylic acids that are solid at room temperature are effective in further improving dyeing density and preventing bleeding, and more preferred specific examples include bis-hydroxyethyl terephthalate and bis-hydroxypropyl. Phthalate, HO-02H4 (-oco-
e-COO-C2Hs-)20Hnatowo'% can be obtained.

As mentioned above, the suitable blending ratio of these compounds is 0.
The range is 1 to 30 parts by weight, preferably 0.2 to 20 parts by weight.
Parts by weight range. If the amount of the compounding agent is less than 0.1 parts by weight, the effect of improving the dyeing density is small, and if it exceeds 30 parts by weight, these compounds may bleed onto the surface or conversely reduce the dyeing density.

When using tetrahydrofurfuryl acrylate, which has strong polymer solubility and low viscosity, as a component of the crosslinking agent, the composition of the present invention composed of the above components can be applied directly to coatings such as roll coating, barcode coating, and blade coating. However, in order to improve coating workability, it is necessary to blend these compositions with a solvent such as ethyl alcohol, methyl ethyl ketone, toluene, ethyl acetate, dimethyl formamide, etc. to adjust the coating viscosity to an appropriate level. This makes it easier to apply curtain coats, flow coats, dip coats, etc.

Depending on the purpose for which one or more of the compositions is used, fine inorganic particles of several circumferences or less, such as silica, alumina,
Talc, titanium Mide, etc. may be blended.

The composition of the present invention is cured by active energy rays such as electron beams and ultraviolet rays, but in consideration of radiation source control, it is better to use ultraviolet rays. It is preferable to add 0.1 to 10.0 parts by weight of a photopolymerization initiator per 100 parts by weight of the total of the polyester resin and crosslinking agent. Specific examples of the photopolymerization initiator include benzoin, benzoin butyl ether, and benzyl dimethyl. Ketal, ethylphenylglyoxylate, jetoxyacetophenone,
1,1-dichloroacetophenone, 4'-inpropyl-2- and 2-methylpropiophenone, 1-
Hydroxycyclohexyl phenyl ketone, benzophenone, benzophenone/jetanolamine, 4.4'
-carbonyl compounds such as bisdimethylaminobenzophenone, 2-methylthioxanthone, tart-butylanthraquinone, and benzyl; sulfur compounds such as tetramethylthiuram monosulfide and tetramethylthiuram disulfide; azobisisobutyronidonyl, azobis-2,
Azo compounds such as 4-dimethylvaleronitrile; peroxide compounds such as benzoyl peroxide and di-tert-butyl peroxide; these compounds may be used alone or in a mixed system of two or more.

A film or paper shape is suitable as a substrate for coating the above composition and irradiating active energy rays to obtain a recording medium, such as polyester film, polypropylene film, nylon film, and vinyl chloride film. Plastic film-like materials such as: coated paper, baryta paper, art paper, etc. that are mainly made of wood fibers; paper-like materials such as acrylic paper, PP paper, polyester paper that are mainly made of plastic fibers, and transparent Polyester film is suitable in terms of properties, and PP paper is suitable in terms of image quality.

These papers or films can be used as they are, or if necessary, they can be pretreated by washing, etching, corona discharge, active energy ray irradiation, dyeing, printing, etc. good.

By applying the sublimable disperse dye dyeable composition to these substrates by the above-described coating method, the film thickness after curing is 0.5 to 10.
The coating is carried out uniformly so that the weight is 0 gm, preferably 1 to 50 gm.

When the film thickness becomes thinner than 0.5 Bm, the diffusion of the dye reaches saturation halfway and it is not possible to dye the film in C color.

On the other hand, if the film thickness exceeds 100 lumens, blocking tends to occur during heating.

When stacking dyed films or papers, it is better to apply the composition to only one side of the substrate in order to prevent the disperse dye from transferring, but in order to actively prevent the dye from transferring, It is more preferable to provide a non-migration layer on the surface opposite to the coated surface of the sublimable disperse dye o'f dyeing composition.

As the composition forming the non-migration layer, the above-mentioned polyfunctional fl
A coating agent consisting of 100 parts by weight of a monomer or oligomer mixture consisting of a functional monomer or/and a functional monomer and, if necessary, 0.1 to 100 parts by weight of the above-mentioned photopolymerization initiator can be used; In order to sufficiently prevent dye migration, it is necessary that the monomer or oligomer mixture has an average of 1.5 or more polymerizable groups per molecule. Similar to the sublimable disperse dye dyeable composition, these coating agents can also be adjusted in viscosity with a solvent, coated on a substrate, and cured.

[Examples] Below, examples of the present invention are listed and explained in more detail.
JJ. In addition, in Examples and Comparative Examples, all "r parts" represent parts by weight.

Reference example 1. Creating a transfer sheet Use commercially available transfer paper with a thickness of 60ILm (Kayasef) Blue 13
A transfer sheet was prepared by uniformly applying a 5% trichlorethylene solution of 6CEI (manufactured by Honkayaku).

Reference example 2. Dry heat transfer method A sheet of paper is placed on an ironing board, a recording medium is placed on top of the paper, and the transfer sheet prepared in Reference Example 1 is overlaid. Further, a commercially available paper with a thickness of 85 gm was placed on top of this, and then heated on a hot plate at 145° C. for 10 seconds under pressure of 1 kg/cm 2 .

Reference example 3. Evaluation of Blocking Resistance After the dry heat transfer in Reference Example 2, when the dyed article and the transfer sheet were peeled off, the blocking resistance was expressed as "good" if the dyed article could be easily peeled off, and the dyed article was tacky. Items that required some effort were labeled as ``defective.''

Reference example 4. Staining density measurement method Use a color analyzer (Hitachi Model 307) to measure the dye density, and in the case of a transparent recording medium, measure the light transmittance T and calculate it as -1ogT, and in the case of an opaque recording medium, calculate the reflectance. R was measured and calculated as -1ogR.

Examples 1 and 2: Comparative Examples 1 to 7 After mixing and adjusting the compositions shown in Table 1, they were mixed at 1100 p.
It is coated uniformly on one side of a thick transparent polyester film (Lumirror manufactured by Toshi Co., Ltd., product number 100, type 510) by the flow coating method, and then irradiated with ultraviolet rays using a 2kW high-pressure mercury lamp in the air, resulting in a film thickness of 4JL. A recording material dyeable with a sublimable disperse dye was obtained. These articles were evaluated according to Reference Examples 1 to 4, and the results are shown below.

A peel test of the cured composition to polyester film using cellophane tape revealed that
The article of the invention was good and did not peel.

B HE T : Bis-hydroxyethyl terephthalate 2P6A Nidipentaerythritol hexaacrylate 2P5A Nidipentaerythritol pentaacrylate 2P4A Nidipentaerythritol tetraacrylate A-DEP : 2,2-bis(4-acryloyloxyjetoxyphenyl)propane polyester resin A: Resin consisting of terephthalic acid/isophthalic acid/ethylene glycol/neopentyl glycol (molecular weight: 1500G to 20000, 7g 65°C) Silicone surfactant A: Cl3 CH3 CHi4SiO]s [SiO]rHl CH30-(elf CH20)-r+ C82Cl0
) v-CH3CH3 2m+n+1/nx+ny = 2+5 Example 3゜Polyester resin B 75 parts, acrylic acid addition diacrylate of diglycidyl etherified bisphenol A 1
0 copies, 2P6A5 copies, 2P5A5 copies, 2P4A5 copies, B
A composition consisting of 4 parts of HET, 85 parts of a silicone surfactant, 6 parts of 2-hydroxy-2-methylpropiophenone as a photopolymerization initiator, 300 parts of toluene, and 100 parts of methyl ethyl ketone was uniformly flowed onto one side of PP paper. After the coating was applied, ultraviolet rays were irradiated in the air using 2 kiloliters of high-pressure water to obtain a recording medium having a layer of the composition of the present invention having a film thickness of 5 liters.

When this was subjected to an experiment according to Reference Examples 1 to 4, it was well stained without blocking and showed a reflection optical density of -1 part gR=0.95.

(Note) Polyester resin B: Resin consisting of terephthalic acid/sebacic acid/ethylene glycol/neopentyl glycol (molecular weight: 20,000-25,000.T glO°C) Silicone surfactant B: CH30-(C)I2CHO)Y-( cH2CH20)
v-HCH3 2m+n+1/nx+ny = 0.35 Example 4 60 parts of polyester resin C on one side of coated paper.

2P6A 5 parts, 2P5A 5 parts, 2P4A 5 parts,
2.2-bis(4-acryloxydipropoxyphenyl)-propane 25 parts, diethyl terephthalate 5 parts, silicone surfactant 04 parts, 2-hydrochloride 2-methylpropiophenone 5 parts, ethyl acetate 250 parts , 250 parts of methyl ethyl ketone, 50 parts of silica (Aerosil R-
972, manufactured by Nippon Aerosil Co., Ltd.) was uniformly coated using a blade coating method to a film thickness of 10,
It was cured by irradiating it with ultraviolet light in the air. When this was subjected to dry heat transfer according to Reference Examples 1 to 4, it was dyed well without blocking, and the reflection optical density was -1 part g.
It showed R-0,74.

(Note) Polyester resin C: Resin consisting of terephthalic acid/isophthalic acid/sebacic acid/ethylene glycol/neopentyl glycol (molecular weight: 20,000 to 25,000.T
g 10°C) Silicone surfactant C: CH3,0-(CH2CH20)y-(Go(Hs)z
2 Intestines n+1/nx= 1.3 [Effects of the Invention] The disperse dye dry transfer coloring recording medium of the present invention is as follows.

It is easily dyed at high concentration with sublimable disperse dyes, has much better color development and vividness than conventional dyes, has excellent blocking resistance and high heat resistance, and is dispersible. Dry transfer of dyes can be carried out at low temperatures and in a short time with low energy. Therefore, the recording medium of the present invention is extremely useful as, for example, a color copying material for color copying, electrophotography, or information recording.In particular, the recording medium of the present invention using a transparent IJ1 substrate has excellent transparency and is of great industrial value for OHP applications.

Claims (1)

[Claims] 1. On the surface of the substrate, 40 to 95% by weight of polyester resin and 60 to 5% by weight of a crosslinking agent that can be cured by active energy rays.
at least one selected from silicone surfactants and fluorine surfactants.
A sublimation type heat-sensitive transfer obtained by coating a composition containing 0.01 to 10 parts by weight of seeds and 0.1 to 30 parts by weight of a polyester compound of aromatic polycarboxylic acid and curing with active energy rays. Recorded object of recording method. 2. The recording medium according to claim 1, wherein the polyester resin is a linear thermoplastic polyester resin obtained by polycondensation of dicarboxylic acid and diol. 3. The recording medium according to claim 1, wherein the polyester resin is an unsaturated polyester resin obtained by condensation polymerization of an unsaturated polybasic acid having a reactive double bond and a polyhydric alcohol. 4. The linear thermoplastic polyester resin is a resin obtained by polycondensation of two or more dicarboxylic acids and two or more diols, and has a crystallinity of 1% or less. Recorded object. 5. The recording medium according to claim 1, wherein the crosslinking agent contains at least one type of polyfunctional monomer. 6. The recording medium according to claim 1 or 5, wherein the polymerizable group of the crosslinking agent is a (meth)acryloyloxy group. 7. The main component of the silicone surfactant is a polyoxyalkylene modified product of polydimethylsiloxane, and CH_3
-(SiO)_1_/_2- and -OR- ratio is CH_3
-(SiO)_1_/_2-/-OR-=1/10~1
/0.1. 8. The recording medium according to claim 1, wherein the polyester compound of aromatic polycarboxylic acid is a diester of phthalic acid, isophthalic acid, or terephthalic acid, and is solid at room temperature. 9. The recording medium according to claim 1, wherein the polyester compound of aromatic polyhydric carboxylic acid has the following general formula (I) and is solid at room temperature. ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・・・・
(I) (Here, n is a positive integer from 1 to 5, indicating that the bond is at any position such as ortho position, meta position, or para position, and can be arbitrarily changed depending on n. R_1, R_2 ,・・・・・・・・・,R_n_+_1
are the same or different alkylene groups. 10. The recording medium according to claim 1, wherein the active energy rays are ultraviolet rays. 11. Mixture 10 consisting of polyester resin and crosslinking agent
11. The recording medium according to claim 1 or 10, wherein 0.01 to 10 parts by weight of a photopolymerization initiator is blended with respect to 0 parts by weight. 12. The recording medium according to claim 1, wherein the substrate is a plastic film. 13. The recording medium according to claim 1, wherein the substrate is plastic paper. 14. The recording medium according to claim 1, wherein the base material is paper mainly composed of wood fibers.