JPH09123625A - Sheet for thermal transfer recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet for thermal transfer recording with a low frictional force at the time of non-power supply and at the time of power supply, a least difference in the frictional force between a non-power supply state and a power supply state and high run, and further, with superior preservative stability after application and excellent particle dispersion on a heat-resistant lubricative layer. SOLUTION: This sheet for thermal transfer recording consists of a heat- resistant lubricative layer formed on one of the faces of a base film and a coloring material formed on the other face of the base film. In this case, the heat-resistant lubricative layer contains amino modified silicone oil, carboxyl modified silicone oil and a cohesive high molecular compound. The modification equivalent of the modified silicone oil defined in terms of the weight of the modified silidone oil for 1mol of a modifiable group is 4,000-10,000g for the modified silicone oil and at least, 1,500g for the carboxyl-modified silicone oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer recording sheet, and more particularly to a thermal transfer recording sheet which can be advantageously used for color recording in an OA terminal such as a printer, a facsimile, a copying machine and a television image.

[0002]

2. Description of the Related Art Various methods, such as electrophotography, ink jet, and thermal transfer recording, have been studied for color recording. However, thermal transfer recording methods have other problems in terms of maintainability and operability of the apparatus. This is advantageous as compared with the above method. In the thermal transfer recording method, generally, an image receiving body is superimposed on a color material layer of a thermal transfer recording sheet coated with an ink containing a coloring material, and the back surface of the thermal transfer recording sheet is heated by a thermal head to obtain the color of the thermal transfer recording sheet. Recording is performed by transferring the material to an image receiving member. Such methods include a melting type thermal transfer recording method using a heat melting ink and a sublimation type thermal transfer recording method using an ink containing a sublimable dye.

[0003]

In this type of thermal transfer recording system, since the thermal transfer recording sheet is heated to a high temperature by a thermal head, if the heat resistance of the base film of the thermal transfer recording sheet is insufficient. Then, the base film is fused to the thermal head, and the fusion causes a sticking phenomenon in which the running of the head becomes defective. Furthermore, this causes the sheet to be wrinkled or cut off, making normal recording impossible. For this reason, it has been proposed to provide protective films of various heat-resistant resins in order to improve the heat resistance of the base film (JP-A-55-7467 and JP-A-57-74195). It has also been proposed to add heat-resistant fine particles, a lubricant, a surfactant and the like to the above-mentioned protective layer in order to further improve the properties and reduce the coefficient of friction with the thermal head (Japanese Patent Application Laid-Open No. 55-146790).
JP-A-56-155794 and JP-A-57-1
29789 publications).

However, with the recent increase in the speed of the thermal transfer recording method, a higher load is applied to the thermal transfer sheet because a higher energy is applied to the thermal head than in the prior art. It is difficult to obtain the running performance. The coefficient of friction at the time of non-heating without applying a voltage to the thermal head tends to be large because the effect of the lubricant added to the heat-resistant lubricating layer does not easily appear, and the running property is easily affected. On the other hand, the coefficient of friction at the time of heating and printing in which a voltage is applied to the thermal head also tends to increase because the sticking phenomenon as described above is likely to occur because the heat-resistant lubricating layer is softened by heat. Therefore, a heat-resistant lubricating layer that can always keep the coefficient of friction small is required.

When the thermal transfer recording sheet is running, the coefficient of friction between the back surface of the thermal transfer recording sheet and the thermal head is kept constant regardless of whether it is heated or not, and regardless of the degree of heating. It is desired to be drunk. That is, 1
Since there are areas with high density and areas with low density in the screen, the energy applied to the thermal head will also be different in each part. Here, if the friction coefficient fluctuates greatly due to heating, the tension applied to the color sheet fluctuates depending on the location in one screen. That is, a situation occurs in which the color sheet is pulled by a large amount of tension in one portion, while the tension is hardly applied in another portion. Under such a situation, the color sheet and the image receiving sheet conveyed together with the color sheet may be laterally displaced, or the image receiving sheet may be gradually conveyed obliquely, which makes it difficult to obtain a fine image.

For the above-mentioned reasons, there is a demand for a thermal transfer recording sheet having a heat resistant slipping layer which has a small friction coefficient during heating and a non-heating state and has a small fluctuation. Further, the thermal transfer recording sheet is usually stored by being wound around a plastic cylindrical bobbin or the like, and the heat resistant slipping layer is in contact with a coloring material layer containing a coloring material. Further, the temperature of the thermal transfer recording sheet may be high during storage depending on the storage location and its environment. At this time, if the heat resistant slipping layer and the color material layer containing the color material are fused by heat, a problem such as the appearance of fusion marks during storage when forming an image on the image receptor occurs,
It becomes difficult to obtain a fine image.

In order to solve this problem, there is no fusion between the heat resistant slipping layer of the thermal transfer recording sheet wound around the bobbin and the coloring material layer containing the coloring material even at the time of storage at a high temperature, and image formation is possible. It is required to be able to do without problems.

[0008]

As a result of intensive studies to solve the above problems, the present inventors have selected an amino-modified silicone oil and a carboxy-modified silicone oil having a modified equivalent in the optimum range for the heat resistant slipping layer. By doing so, it is possible to reduce the occurrence of image defects due to the wrinkles of the sheet that are likely to occur during heating in the thermal head, and occur when the thermal head slides on the heat resistant slipping layer of the thermal transfer recording sheet. It has been found that a thermal transfer recording sheet that can reduce frictional force and is particularly excellent in storage stability can be obtained.

That is, the gist of the present invention is to provide a heat transfer recording sheet having a heat-resistant lubricating layer provided on one surface of a base film and a coloring material layer provided on the other surface of the base film.
The modified equivalent weight of the modified silicone oil, which contains the amino-modified silicone oil and the carboxyl-modified silicone oil and the binding polymer compound in the heat resistant slipping layer, and is defined by the weight of the modified silicone oil to 1 mol of the modifying group is , The amino-modified silicone oil is 4,000-
The present invention relates to a thermal transfer recording sheet characterized in that it is 10,000 g and the carboxyl-modified silicone oil is 1,500 g or more.

Hereinafter, the present invention will be described in detail. The amino-modified and carboxyl-modified silicone oil used in the present invention is not particularly limited except the modification equivalent, but for example, a compound having the structure of the following general formula (1) can be used.

[0011]

Embedded image

(In the formula, each R independently represents an alkyl group, a phenyl group, an alkoxy group, an aminoalkyl group or an aminoalkylaminoalkyl group, at least one of which is an aminoalkyl group or Aminoalkyl represents an aminoalkyl group,
In the case of carboxyl-modified silicone oil, each independently represents an alkyl group, a phenyl group or a carboxylalkyl group, at least one of which represents a carboxylalkyl group, and n represents an integer. )

The modified silicone oil is usually synthesized, for example, by the method described in detail in "Silicone Handbook" edited by Kunio Ito (published by Nikkan Kogyo Shimbun Co., Ltd., 1990, page 163 et seq.). As the main raw material, octamethylcyclotetrasiloxane, tetramethyltetraphenylcyclotetrasiloxane, octaphenylcyclotetrasiloxane, etc. are preferable, and these main raw materials and modifying groups (aminoalkyl group, aminoalkylaminoalkyl group, or carboxylalkyl group) It is synthesized by the reaction with silicone oil having

In the present invention, it is necessary that both the amino-modified silicone oil and the carboxyl-modified silicone oil are contained in the heat resistant slipping layer. Since both the amino-modified silicone oil and the carboxyl-modified silicone oil contain a polar group, the polar portion of the ester bond portion contained in the (meth) acrylic polymer compound suitably used in the present invention is It is considered that these modified silicone oils have affinity and are weakly bound to each other, and these modified silicone oils are weakly ionic to each other. As described above, since these modified silicone oils are in an ion-bonded state, they have a role of exhibiting an appropriate increase in retention in the heat resistant slipping layer and exhibiting slipperiness. Therefore, it is necessary that the silicone oil contained in the heat resistant slipping layer has a polar group such as an amino group or a carboxyl group, and it is also important to add the modified silicone oils in an amount relationship so that the ionic bond between the silicone oils sufficiently functions. Is.

On the other hand, when the polar group in the modified silicone oil molecule exceeds a certain range, a non-polar organosiloxyl group (monomer unit) having a side chain such as an alkyl group or a phenyl group, which is a portion exhibiting lubricity, is formed. The content becomes low and the lubricity deteriorates. In addition, the modified silicone oil having such a small modification equivalent, that is, having a large number of polar groups in one molecule, enhances the polarity of the coating solution, reduces the compatibility of the binder, or has low polarity organic particles or non-polar particles. To show the tendency to aggregate the surface-treated inorganic particles,
It greatly reduces the storage stability of the coating liquid and the dispersion of particles on the coating surface. Therefore, the modified silicone oil contained in the heat resistant slipping layer needs to be appropriately modified.

Generally, a modification equivalent is known as a unit showing the degree of modification of a modified silicone, and this is defined as the weight of the modified silicone per 1 mol of the modifying group of the modified silicone oil. The amino-modified silicone oil used in the present invention has a modification equivalent represented by weight of amino-modified silicone oil relative to 1 mol of amino groups of 4,000 to 10,000 g, and carboxyl-modified silicone oil contains carboxy per mol of carboxyl groups. The modified equivalent weight expressed by weight of the modified silicone oil must be 1,500 g or more.

The heat resistant slipping layer used in the present invention contains one or more binding polymer compounds as a binder for holding silicone oil and particles.
As the polymer compound, it is preferable to include a polymer compound containing an acrylic acid ester of alkyl alcohol and / or a methacrylic acid ester of alkyl alcohol as a constituent component. More preferably, it has 6 carbon atoms.
20 or more and 20 or less, more preferably 6 or more and 10 carbon atoms
It is preferable that the polymer compound contains the following acrylic acid ester of alkyl alcohol and / or methacrylic acid ester of alkyl alcohol as a constituent component.

The acrylic or methacrylic acid ester of an alkyl alcohol having 6 to 10 carbon atoms is not particularly limited, and examples thereof include hexanol, heptanol, octanol, decanol, dimethylbutanol, ethylbutanol, methylpentanol, dimethylpen. Alcohol such as tanol, ethylpentanol, methylhexanol, ethylhexanol, methylheptanol, cyclohexylethanol, dimethylheptanol, ethyldimethylpentanol, trimethylhexanol, cyclohexylpropanol, dimethyloctanol, cyclohexanol and acrylic acid, or methacrylic acid Can be mentioned.

The polymer containing them as a constituent is a polymer of one or more of these acrylic acids and methacrylic acids, or a polymer of one or more of these acrylic acids and methacrylic acids and other constituents. Copolymers are common. The above-mentioned other constituents are those used for adjusting the physical properties of the polymer, and are not particularly limited, and for example, methyl methacrylate, methyl acrylate, ethyl acrylate, ethyl methacrylate,
Propyl acrylate, propyl methacrylate, isopropyl acrylate, isopropyl methacrylate,
Butyl acrylate, butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, ter-
Acrylic acid esters or methacrylic acid esters having 5 or less carbon atoms such as butyl acrylate and ter-butyl methacrylate, styrene, α-methylstyrene,
Examples thereof include vinyl compounds such as vinyltoluene, acrylic acid, methacrylic acid, maleic acid, acrylonitrile, methacrylonitrile, acrylamide and ethylene chloride. Above all, methyl methacrylate and butyl methacrylate are often used.

The method for synthesizing the polymer compound may be a conventional method,
For example, constituent components mixed in a predetermined amount can be obtained by using a radical polymerization method in a solution according to a conventional method. The polymer compound thus obtained has 6 carbon atoms.
The composition ratio of acrylic acid ester or methacrylic acid ester of alkyl alcohol of 10 to 10 is 0.5
-100% by weight, preferably 1-20% by weight.

Further, to the heat resistant slipping layer of the present invention, another polymer compound other than a polymer compound containing an acrylic acid ester of alkyl alcohol and / or a methacrylic acid ester of alkyl alcohol as a constituent may be added. .
The polymer compound is not particularly limited, but for example, a normal thermoplastic resin having a glass transition temperature of 50 ° C. or higher is preferably used, and specifically, a polyacrylic acid ester,
Polymethacrylic acid ester, vinyl chloride copolymer, styrene / acrylonitrile copolymer, polycarbonate,
Polyester, polyvinyl butyral, polyvinyl acetal, polyurethane and the like are preferably used. If the glass transition temperature of the polymer compound is too low, when the thermal transfer recording sheet is stored at a relatively high temperature, the dye may be transferred from the side of the color material layer that has been rolled up, or the color material layer and heat resistance The slipping layer may cause blocking.

Further, in the heat resistant slipping layer of the present invention, in addition to the above components, organic or inorganic non-sublimable particles, a dispersant, an antistatic agent, an antiblocking agent, an antifoaming agent, Additives such as an antioxidant, a viscosity adjusting agent, a pH adjusting agent, and a lubricant may be added as needed. The particles are added to the heat resistant slipping layer for the purpose of increasing the surface roughness to reduce the coefficient of friction and improving the cleaning property for the head. For this reason, various measures have been taken to reduce the degree of wear by adding spherical particles or soft particles having a uniform particle diameter, and to control the surface roughness with minute particles. As the diameter of spherical particles having a uniform particle diameter or soft particles, crosslinked silicone particles having a particle diameter of several hundred nm to 3 μm, more preferably 0.5 to 2 μm are used, and the size of the fine particles is small. Usually, a material having a thickness of about several tens of nm is suitable, and silica gel whose surface is treated with non-polarity is more preferably used in order to improve the affinity with the binder.

As described above, when particles are added to the heat resistant slipping layer, if the affinity between the solution portion in the coating solution and the particles is low, a phenomenon in which the particles agglomerate and settle is induced, and the heat resistant slipping property is increased. On the surface of the layer, particles have an aggregated shape, and the aggregates form irregularities on the image at the time of printing, so the image quality deteriorates.
Therefore, it is necessary that the particles are distributed individually one by one without aggregating on the surface of the heat-resistant lubricating layer, and it is also required that aggregation and sedimentation of the particles do not occur in the coating solution.

In order to form the heat resistant slipping layer of the present invention, the adhesion between the (meth) acrylic polymer compound and the amino-modified silicone oil and the carboxyl-modified silicone oil, and the base film and the heat resistant slipping layer is improved ( Polymer compounds other than (meth) acrylic polymer compounds,
Then, additives such as particles and a solvent are added and mixed to obtain a heat resistant slipping layer coating solution, which can be formed by coating and drying the coating solution on the base film.

As a mixing ratio in the coating solution for the heat resistant slipping active layer, the value of the ratio of the above-mentioned polymer compound (B) to the (meth) acrylic polymer compound (A) is 0 to 20.
(Weight ratio) is preferable, and more preferably 0.05 to 10
(Weight ratio). Amino-modified silicone oil (C) for polymer compound (A) and polymer compound (B)
The compounding ratio (C + D) / (A + B) of the carboxyl-modified silicone oil (D) is generally 0.01 to 0.3, and preferably 0.05 to 0.2.
Further, the polymer compound (A) and the polymer compound (B)
Spherical particles or soft particles (E) having a particle diameter of about 0.5 to 2 μm and fine particles (F) having a size of several tens of nm or less
The compounding ratio (E + F) / (A + B) is 0.01 to 0.3.
Is generally, and preferably 0.05 to 0.2.

The proportion of acrylic acid ester and / or methacrylic acid ester of alcohol having 6 to 10 carbon atoms as a constituent component in the constituent component of total high molecular weight (A + B) is 1% by weight or more. Is preferred. Particularly preferably, it is 2% by weight or more. The solvent used for the heat resistant slipping layer coating liquid is not particularly limited, but examples thereof include aromatic solvents such as toluene and xylene; methyl ethyl ketone, methyl isobutyl ketone, and the like.
Ketone solvents such as cyclohexanone; ester solvents such as ethyl acetate and butyl acetate; alcohol solvents such as isopropanol and butanol; ether solvents such as dioxane and tetrahydrofuran; amide solvents such as dimethylformamide and N-methylpyrrolidone. Can be mentioned.

The coating solution used for forming the heat resistant slipping layer is, for example, a gravure coater, a reverse coater, an air coater described in "Coating Method" by Yuji Harasaki (1979, published by Maki Shoten). There are various methods such as a method using a doctor coater.
The thickness of the heat-resistant lubricating layer formed on the base film is
The dry film thickness is usually 0.1 to 10 μm, preferably 0.3.
５5 μm.

It is also known to form the heat resistant slipping layer by using a thermosetting resin. In that case, a liquid containing a thermosetting resin and a curing agent is applied and dried, and then cured. And heat-treated to obtain a heat resistant slipping layer of the cured film. Good performance can be obtained, but the cost is high because a thermosetting step is required. When a thermoplastic resin is used, it is advantageous in terms of cost because there is no curing step.

The base film used in the thermal transfer recording sheet of the present invention is not particularly limited, and examples thereof include polyethylene terephthalate film, polyamide film, polyaramid film, polyimide film,
Examples thereof include a polycarbonate film, a polyphenylene sulfide film, a polysulfone film, a cellophane, a triacetate film, and a polypropylene film. Among them, a polyethylene terephthalate film is preferable in terms of mechanical strength, dimensional stability, heat resistance, and price, and in particular, biaxial. Stretched polyethylene terephthalate films are preferred. The thickness of these base films is generally 1 to 30 μm, but preferably 2 to 10 μm.
m.

An adhesive layer may be provided on the base film for the purpose of improving the adhesiveness with the heat resistant slipping layer.
Although there is no particular limitation on the composition of the adhesive layer, a polyester resin is preferable. The method for forming the coloring material layer provided on the surface opposite to the heat resistant slipping layer on the base film of the thermal transfer recording sheet is not particularly limited, and, for example, in the case of a sublimation type thermal transfer recording sheet, An ink can be prepared by dissolving or dispersing a sublimation or heat diffusible dye and a binder resin having good heat resistance in an appropriate solvent, and the ink can be applied to a base film and dried to form an ink. In the case of a thermal transfer recording sheet, a coloring material such as a pigment or a dye is dissolved or dispersed in a heat-fusible substance using a solvent, if necessary, to prepare an ink, and the ink is applied to a base film, It can be formed by drying.

The sublimation or heat diffusible dye used in the sublimation type thermal transfer recording sheet is not particularly limited, and is an azo type, anthraquinone type, styryl type, indoaniline type, quinophthalone type, azomethine type, coumarin type, or condensation type. Various nonionic dyes such as ring systems are used, and as the binder resin, polycarbonate resin, polysulfone resin, polyvinyl butyral resin, phenoxy resin, polyarylate resin, polyamide resin,
Polyaramid resin, polyimide resin, polyetherimide resin, polyester resin, acrylonitrile-styrene resin and acetylcellulose, methylcellulose,
Cellulose-based resins such as ethyl cellulose are used. Examples of the solvent include aromatic solvents such as toluene and xylene; ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; ester solvents such as ethyl acetate and butyl acetate; alcohol solvents such as isopropanol, butanol and methyl cellosolve; Ether-based solvents such as dioxane and tetrahydrofuran; amide-based solvents such as dimethylformamide and N-methylpyrrolidone are used.

As the coloring material used for the fusion type thermal transfer recording, for example, inorganic pigments such as carbon black as pigments; various organic pigments such as azo type and condensed polycyclic type are used. , Basic dyes, oil-soluble dyes, metal complex dyes and the like are used. As the heat-fusible substance, a solid or semi-solid substance having a melting point of 40 to 120 ° C. is preferable, and examples thereof include paraffin wax, microcrystalline wax, carnauba wax, montan wax, wood wax, and oil-based synthetic wax. As the solvent, those similar to the case of the above-described sublimation type thermal transfer recording sheet can be used.

In addition to the above-mentioned components, the above-mentioned ink for the color material layer contains, if necessary, organic or inorganic non-sublimable particles, a dispersant, an antistatic agent, an antiblocking agent, an antifoaming agent, an antioxidant. You may add additives, such as an agent, a viscosity modifier, a pH adjuster, and a lubricant. These color material layer inks may be applied by the same application method as that of the heat-resistant lubricating layer, and the coating film thickness is suitably 0.1 to 5 μm in terms of dry film thickness. Further, in the production of the thermal transfer recording sheet of the present invention, in order to improve the adhesion between each layer formed by the above coating and the base film, the surface of the base film may be subjected to a corona treatment or a polyester resin. An undercoating treatment with a cellulose resin, a polyvinyl alcohol resin, a urethane resin, a polyvinylidene chloride resin, or the like may be performed.

[0034]

EXAMPLES The present invention will be described in more detail below with reference to examples, but the examples are not intended to limit the present invention as long as the gist thereof is not exceeded. Example 1 (a) Preparation of thermal transfer recording sheet A copolymer of methacrylic acid alkylate as a binder (trade name; FR-4660, methyl methacrylate, butyl methacrylate, and 2-ethyl-1-hexyl methacrylate terpolymer) Combined <methylmethacrylate: butylmethacrylate: 2-ethyl-1-hexylmethacrylate = 92: 5: 3 (weight ratio)>, 80 parts by weight of Mitsubishi Rayon Co., Ltd., saturated polyester (trade name; Byron 200, Tg 67 ° C.), 20 parts by weight of Toyobo Co., Ltd., amino-modified silicone oil (trade name: KF-868, modified equivalent weight: 8,800 g / mol,
Viscosity 90 cSt (25 ° C., manufactured by Shin-Etsu Chemical Co., Ltd.)
5 parts by weight, carboxy-modified silicone oil (trade name;
X-22-162C, modified equivalent weight; 2,330 g / mo
1, viscosity 207 cSt (25 ° C., manufactured by Shin-Etsu Chemical Co., Ltd.) 8 parts by weight, spherical silicone resin (trade name; Trefil R-930, average particle size 1.52 μm, manufactured by Toray Dow Corning Silicone Co., Ltd.) 5 parts by weight Part, amorphous silica fine particles (trade name; Aerosil R-972, average particle size of about 16 nm, manufactured by Nippon Aerosil Co., Ltd.) 5 parts by weight, and surfactant (trade name: Surfynol 104, manufactured by Nissin Chemical Industry Co., Ltd.) 1 part by weight is mixed with a mixed solvent of toluene and 2-butanone to prepare a suspension having a solid content of 20% by weight, glass beads having an average particle diameter of 2 mm are added thereto, and the mixture is dispersed with a paint shaker for 2 hours. Then, a coating solution was prepared.

This coating solution was applied to a biaxially stretched polyethylene terephthalate film (thickness of 4.5 μm) so as to have a wet film thickness of about 7.5 μm, and dried at 130 ° C. for 5 seconds to form a heat resistant slipping layer. On the side opposite to the heat resistant slipping layer of this film, a red sublimable dye (color index,
Disperse Red 60) 4 parts by weight, phenoxy resin 1
About 1 μm of an ink containing 0 parts by weight, 90 parts by weight of methyl ethyl ketone, and 10 parts by weight of isopropanol was applied and dried.
A color material layer having a thickness of m was formed to prepare a thermal transfer recording sheet.

(B) Preparation of Image Receptor 10 parts by weight of TR-220 (trade name, saturated polyester resin, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), amino-modified silicone oil (trade name; KF393, manufactured by Shin-Etsu Chemical Co., Ltd.) 0.5 parts by weight, 15 parts by weight of methyl ethyl ketone,
A liquid consisting of 15 parts by weight of toluene was applied to a synthetic paper (trade name: YUPO FPG150, manufactured by Oji Yuka Synthetic Paper Co., Ltd.) with a wire bar, dried (dried film thickness: about 5 μm), and further heated in an oven at 90 ° C. for 20 minutes An image receptor was prepared by heat-drying for minutes.

(C) Measurement of running torque The color material layer surface of the thermal transfer recording sheet prepared in (a) above and the resin coated surface of the image receptor prepared in (b) above are overlapped to make the recording sheet heat resistant. Using a partial Grace type line thermal head having a heating resistor density of 6 dots / mm on the surface of the slipping layer, it is sandwiched between a platen roller having a radius of 2.75 cm and a printing pressure of 2 kg, and the platen roller is rotated at 6 rpm. When rotating, the printing energy is not applied to the thermal head at all, or 0.4 W / dot of electric power is intermittently applied for 16 msec at a 33 msec cycle to perform transfer recording, and the rotational load generated on the platen roller at this time Was measured using a load torque tester (MDT2-AMP, manufactured by Shinmei Denki). The results are shown in Table 1.

(D) Distribution of particles on surface of heat resistant slipping layer The surface of the heat resistant slipping layer of the thermal transfer recording sheet prepared in (a) above was observed with an optical microscope at a magnification of 1000 times.
The evaluation criteria are as shown below. The results are shown in Table 1. Evaluation Criteria ◯: Particle trefil R-930 is almost completely independently distributed, and aggregation of fine particle Aerosil R-972 is not observed. X: Particle Trefil R-930 and fine particle Aerosil R-
972 forms a large aggregate of 20 μm or more, and the particle trefil R-930 is not confirmed by itself. XX: Particle Trefil R-930 and fine particle Aerosil R
-972 forms very large aggregates.

(E) Dispersion stability of particles in coating solution The coating solution prepared in (a) above was allowed to stand for 1 week and the sedimentation of particles was observed. The evaluation criteria are as follows, and the results are
1 is shown. Evaluation criteria ○: No sedimentation of particles is observed in the coating liquid. X: Sedimentation of particles is confirmed in the coating liquid.

Example 2 In place of KF-868 used as the amino-modified silicone oil in Example 1, 5 parts by weight of KF-865 (modified equivalent weight 4,400 g / mol, manufactured by Shin-Etsu Chemical Co., Ltd.) was used to obtain heat-resistant lubricity. The test was performed in the same manner as in Example 1 except that the layers were prepared. Table 1 shows the results.

Example 3 In place of KF-868 used as the amino-modified silicone oil in Example 1, 5 parts by weight of KF-859 (modified equivalent weight 6,125 g / mol, manufactured by Shin-Etsu Chemical Co., Ltd.) was used to obtain heat-resistant lubricity. The test was performed in the same manner as in Example 1 except that the layers were prepared. Table 1 shows the results.

Example 4 In place of KF-868 used as the amino-modified silicone oil in Example 1, 5 parts by weight of KF-860 (modification equivalent 7,600 g / mol, manufactured by Shin-Etsu Chemical Co., Ltd.) was used for heat-resistant lubricity. The test was performed in the same manner as in Example 1 except that the layers were prepared. Table 1 shows the results.

Comparative Example 1 In place of KF-868 used as the amino-modified silicone oil in Example 1, 5 parts by weight of BY-16-850 (modified equivalent 1,500 g / mol, manufactured by Toray Dow Corning Silicone Co., Ltd.) was used. A test was conducted in the same manner as in Example 1 except that the heat resistant slipping layer was produced by the above method. Table 1 shows the results.
Shown in

Comparative Example 2 In place of KF-868 used as the amino-modified silicone oil in Example 1, 5 parts by weight of KF-869 (modified equivalent weight 3,800 g / mol, manufactured by Shin-Etsu Chemical Co., Ltd.) was used to obtain heat-resistant lubricity. The test was performed in the same manner as in Example 1 except that the layers were prepared. Table 1 shows the results.

Comparative Example 3 In place of KF-868 used as the amino-modified silicone oil in Example 1, 5 parts by weight of KF-8005 (modified equivalent weight of 11,000 g / mol, manufactured by Shin-Etsu Chemical Co., Ltd.) was used to provide heat-resistant lubricity. The test was performed in the same manner as in Example 1 except that the layers were prepared. Table 1 shows the results.

Comparative Example 4 In place of KF-868 used as the amino-modified silicone oil in Example 1, PS-513 (modified equivalent weight 2
The test was performed in the same manner as in Example 1 except that the heat resistant slipping layer was prepared by using 5 parts by weight of 7,000 g / mol, manufactured by United Chemical Technology Co., Ltd.). Table 1 shows the results.
Shown in

[0047]

[Table 1]

[0048]

INDUSTRIAL APPLICABILITY The heat-sensitive transfer recording sheet having the heat resistant slipping layer of the present invention has a small frictional force when energy is not applied and when it is applied, and has a small difference in frictional force between non-application and application of energy. In particular, it is excellent in storage stability of the coating solution and dispersibility of particles on the surface of the heat resistant slipping layer.

Claims (2)

[Claims] 1. A thermal transfer recording sheet having a heat resistant slipping layer provided on one side of a base film and a coloring material layer provided on the other side of the base film, wherein an amino-modified silicone oil and Modified group 1 containing carboxyl-modified silicone oil and a binding polymer compound
The modified equivalent weight of the modified silicone oil defined by the weight of the modified silicone oil with respect to mol is such that the amino-modified silicone oil is 4,000 to 10,000 g and the carboxyl-modified silicone oil is 1,500 g or more. Sheet for thermal transfer recording. 2. The thermal transfer recording sheet according to claim 1, wherein the heat resistant slipping layer contains heat resistant particles.