JPS61106293A - Thermal transfer recording sheet for forming transparent original - Google Patents

Abstract

PURPOSE:To provide a thermal transfer recording sheet capable of being printed by a thermal head to give an image capable of being seen in the manner of transparency, by providing a transparent base and a transparent receiving layer provided on the base, the layer receiving a dye transferred from a thermal transfer sheet when being heated. CONSTITUTION:The thermal transfer recording sheet 1 for forming a transparent original comprises a receiving layer 3 on the transparent base 2. Another thermal transfer recording sheet 1 for forming a transparent original comprises a receiving layer 3 on the base 2 and a releasing agent layer 4 provided on at least a part of the layer 3. The thermal transfer sheet 5 comprises a thermal transfer layer 7 on one side of a base 6, and when it is heated, a coloring material in the layer 7 is transferred onto the thermal transfer recording sheet. The layer 7 of the sheet 5 and the receiving layer 3 of the sheet 1 are laminated on each other, and thermal energy according to image information is supplied to the interface of the two sheets, whereby the coloring material in the layer 7 is transferred to the receiving layer 3 in accordance with the thermal energy.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention can be used for overhead projectors (oHP) and slide projectors, or can be used for diazocopy, photoengraving, etc., and can be viewed with transmitted light. The present invention relates to a thermal transfer sheet for creating two continuous transparent originals, in which a printed matter, in other words, a transparent original, is created by transferring coloring material from a thermal transfer sheet.

Conventional Techniques Conventionally, photographic films such as silver halide photographic film and @diazo photographic film have been mainly used as sheets for producing transparent manuscripts. However, in photographic films such as ■ and ◎, images are formed optically, and require exposure, development, and, if necessary, fixing steps, which vary somewhat depending on the material.

Incidentally, in recent years, there has been an increasing demand for creating and using hard copies directly from electrical signals such as images on a CRT.

In response to these demands, a thermal transfer sheet is used in combination with a thermal transfer sheet, which is provided with a sublimable disperse dye layer that has the property of transferring when heated, and the sublimable disperse dye is transferred onto the thermal transfer sheet while being controlled. A method has been proposed to obtain a photograph-like image with gradation. This method is an application of the method used for dyeing heat transfer sheets made of polyester fiber using a heat transfer sheet, but the heating time is sufficiently long for transfer to fibers;
A thermal head is used as a typical heating means when making a hard copy directly from an electrical signal, but heating by a thermal head is usually extremely short. -For example, the printing conditions for polyester fibers are 200°C for about 1 minute, but the thermal head printing conditions are 400°C for several minutes. l
l5I! It is about c. For this reason, it has been impossible to perform transfer onto polyester fibers by combining a conventional thermal transfer sheet and polyester fibers and using a thermal head, and it has also been impossible to create a transparent original.

Problems to be Solved by the Invention Accordingly, an object of the present invention is to provide a thermal transfer sheet that can be printed using a thermal head and can be viewed with transmitted light.

The present invention provides a transparent substrate for creating a transparent original, comprising a transparent substrate and a transparent receiving layer provided on the transparent substrate, which receives dyes transferred from a thermal transfer sheet when heated. Regarding thermal transfer sheets.

Hereinafter, preferred specific examples of the present invention shown in the drawings will be described.

A thermal transfer sheet (hereinafter often referred to as a thermal transfer sheet) 1 for creating a transparent original according to a first aspect of the present invention is a first
As shown in the figure, a receptor layer 3 is provided on a transparent base material 2. Further, as shown in FIG. 2C2, the thermal transfer sheet 1 of the second embodiment of the present invention is provided with a receiving layer 3 on the base material 2, and on at least a portion of the receiving layer 3. A mold release agent layer 4 is provided.

This mold release agent l1i4 may be provided on the entire surface of the receiving layer 5, but as shown in FIG.
; may be provided alone, or a female-type agent may be contained inside the receiving layer 3.

The base material 2 has the role of holding the receptor layer 3, and since heat is applied to the base material 2, it has a mechanical strength that does not cause any trouble in handling even in a heated state.
In addition, it is desirable that the information be transparent.

Specific examples of such transparent base material 2 include polyethylene film, polypropylene film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, polyethylene terephthalate film, polycarbonate film, nylon film, polystyrene film, and ethylene vinyl acetate film. Among plastic films such as polymer films, ethylene vinyl alcohol copolymer films, and ionomers, transparent or translucent films (these may be colored transparent or colored translucent) are included. When importance is placed on preventive properties and heat resistance, polyethylene terephthalate film, polycarbonate film, and nylon film are preferred, and polyethylene terephthalate film is particularly excellent.

The thickness of this base material 2 is usually 3 to 50 μm, preferably 5 μm.
It is about 15 μm.

As mentioned above, the receiving layer 3 of the thermal transfer sheet 1 has the function of receiving and receiving the dye that migrates from the thermal transfer sheet when it is heated. It will be done.

(a) Those having ester bonds Polyester resins, polyacrylic acid ester resins, polycarbonate resins, polyvinyl acetate resins, styrene acrylate resins, vinyl toluene acrylate resins, etc.

(Those with urethane bonds polyurethane resin etc. Those with T-'l amide bond polyamide resin, etc.

(Those with diurea bond urea resin etc.

(e) Other materials with highly polar bonds ``Polycaprolactone resin, styrene-non-fomaleic acid resin, polyvinyl chloride resin, polyacrylonitrile resin, etc.

In addition to the synthetic resins mentioned above, mixtures or copolymers thereof may also be used.

Further, the receiving layer 3 can also be formed from two types of resins having different properties. For example, -io.

The first region of the receptive layer is formed of a synthetic resin having a glass transition temperature of ~20°C and a polar group, and the second region of the receptive layer is formed of a synthetic resin having a glass transition temperature of 40°C or higher. This first
Both the region and the second region are exposed on the surface of the receptor layer, the first region occupies 15% or more of the surface, the first region exists independently of each other in the form of an island, and the island-like portion It is preferable that the length in the longitudinal direction of each is 0.5 to 2 mm.

The thermally transferred portion 1 of the first aspect of the present invention contains a two-dye-permeable mold release agent in the receiving layer 3 made of the resin as described above.

As such a mold release agent, solid waxes, fluorine-based or phosphate-based surfactants, silicone oils, etc. are used. These compounds are added in advance to the resin forming the receptive layer, and the resulting resin mixture solution is applied onto the base material and dried to obtain the receptive layer. do.

The solid wax is preferably dispersed as fine particles in the resin forming the receptor layer 3. Therefore, the solid wax is preferably treated with a ball mill, tint mill, etc., before being added to the resin. As the wax, polyethylene wax, amide wax, Teflon powder, etc. are used.The solid wax is added in an amount of 5 to 50 parts by weight, preferably 10 to 20 parts by weight of the resin. If the amount added is less than 5% by weight, a sufficient mold release effect cannot be obtained,
The thermal transfer layer may thermally adhere to the receiver 1-. If the amount added exceeds 50% by weight, the dye that migrates from the thermal transfer layer upon heating cannot be sufficiently received, and the resulting image may not have sufficient resolution.

A fluorine-based or phosphate-based surfactant is also added as a mold release agent to the resin forming the receptor layer. It is thought that a part of the surfactant added to the resin appears on the surface of the receptor layer, and therefore a mold release effect is obtained.

Such surfactants include specific examples (diphosphate ester compounds such as Plysurf A208S, Plysurf A210G, and Plysurf DB-01 (above No. 1).
Industrial Pharmaceuticals), Gafatsuk R8-410, Gafatsuk RA
-600゜Gafatsuku uz610 (toho chemical industry)
, and Unidyne DS50 as a fluorosurfactant.
1. Unidyne DS502 (Daikin Industries), FO4
30, FO431 (Sumitomo 3M), etc. This surfactant is added to the resin in a range of 0.5 to 10% of the resin it.
It is added by the mouse of Sakazumechi. If the amount added is less than 0.5 weight percent, a sufficient mold release effect cannot be obtained. In addition, if the amount added exceeds 10% by weight, the surface of the receptor layer becomes sticky, dirt tends to adhere to the surface, and when the transfer layer and receptor layer come into contact, the transfer layer becomes sticky even without heating. The dye may migrate to the receiving layer, causing background smearing.

In addition, silicone oils also contain C in the resin forming the receptor layer.
It is added as a mold release agent. Although oily silicone oils can be used, hardened silicone oils are preferred. Examples of the curable silicone oil include reaction curable, photocurable, and catalytic curable silicone oils. Among these, reaction-curing silicone oils are particularly preferred.

When using such curable silicone oils as a mold release agent, the surface of the receiving layer may become sticky or have dust attached, compared to the case of the surfactant-based mold release agents mentioned above. Therefore, a large amount of C can be used. The curable silicone oil can be added to the resin in an amount of 0.5 to 30% by weight based on the weight of the resin. If the amount added is less than 0.5% by weight, a sufficient release effect may not be obtained and the swallow transfer layer may thermally adhere to the receptor layer. If the amount added exceeds 30% by weight, the dye that migrates from the thermal transfer layer upon heating cannot be fully received (1:1), and the resulting image may not have sufficient recording density.

The reaction-curing silicone oil is preferably one obtained by reaction-curing an amino-modified silicone oil and an epoxy-modified silicone oil.

Specifically, amine-modified silicone oils include ICP-595, KF-857, and KF- manufactured by Shin-Etsu Chemical Co., Ltd.
858, -60-16
4, KP-103, etc. are used.

Catalyst or photo-curable silicone oil Teha, KS
705F-1'8 (catalyst), K 8705F-ps-
1 (catalyst), K8720. Examples include KS770-PL-5 (catalyst) and KS774-PL-5.

As described above, the thermal transfer sheet 1 of the second aspect of the present invention has the receptor layer 3 made of the resin provided on the base material 2, and furthermore, the receptor layer 3 is provided on at least a portion of the receptor layer 3. Although the mold release agent layer 4 is provided (or removed), this mold release agent layer 4
The above-mentioned mold release agent is dissolved or dispersed in a suitable solvent, and the resulting solution or dispersion is applied onto the receptor layer 3,
It can then be formed by drying.

The film thickness of this mold release agent layer is 0.01 to 5 μm, preferably 0.01 to 5 μm.
．． It is desirable that the thickness is 0.05 to 2 μm.

When the thickness of the release agent layer is less than 0.01 μm, sufficient
If the length exceeds 5'11 m, dye permeability will be hindered, which is not preferable.

As mentioned above, the release agent layer 4 may be provided on the entire surface of the receptive layer 3, but may be provided only on a part of the receptive layer 3. Generally, the release agent layer While it is difficult to print explanatory text etc. on top, it is possible to print on top of the receiver.

Therefore, if it is necessary to print on a thermal transfer sheet, it is preferable to apply the release agent only on a portion of the receiver 1.

The third aspect of the thermal transfer sheet according to the present invention is characterized in that the above-mentioned solid receptor layer contains fine silica powder.

In the present invention, silica refers to silicon dioxide or a substance containing silicon dioxide as a main component. The finely powdered silica to be contained in the receiver has an average particle size of 10 to 100 mμ and a specific surface area of less than 250 fN''/?, more preferably an average particle size of 10 to 50 mμ and a specific surface area of 20 to 20 ON'I.
P is used.

If the average particle size of the fine powder silica is larger than this range, the dispersion stability of the fine powder silica in the coating composition for the thermal transfer layer used to form the receptor layer will decrease, and the smoothness of the surface of the receptor layer of the thermal transfer sheet will deteriorate. This results in significant damage and the image obtained by thermal transfer becomes unclear. Furthermore, if the average particle size of the fine powder silica is smaller than this range, the fluidity of the coating composition for thermal transfer 1 used to form the receptor layer will decrease, and the effect of adding fine powder silica to the thermal transfer sheet will not be sufficiently exhibited. Not done.

Specific examples of fine powder silica that satisfy these conditions include AERO8IL R972 and AERO8IL
130, AERO8IL 200, AgRO8IL
0X50, AERO8IL TT600, AERO
8-engine L MOX80, AEROS I LMOX17
0 (silica powder manufactured by Aerosil Co., Ltd.).

Further, the content of fine powder silica is in the range of 5 to 20% by weight, more preferably 5 to 10% by weight, based on the weight of the receiving layer.

These finely powdered silicas are added in advance to the resin forming the receptor layer, and the resulting resin mixture solution is applied onto a substrate and dried to form the receptor layer.

When forming the receptor layer, various additives are added in addition to the above-mentioned finely powdered silica, but these ingredients are selected from those that do not interfere with the fixation of the dye that migrates from the thermal transfer sheet during heating. It should be. Such additives include:
Examples of cured products of silicone compounds include cured products of epoxy-modified silicone oil and amino-modified silicone oil. Details of each of these modified silicone oils are as described above.

Alternatively, the receiving layer may be formed by applying a dispersion coating film of at least one resin and water on a substrate and then drying it.

As a resin as a dispersoid constituting a dispersion with water,
(b) A mixture of the same type of 11111 with high and low dyeability; (c) At least one resin has dyeability. ,
Mixtures of one or more resins that are not compatible with each other may be used.

The size of the dyeability of a resin depends on its physical properties.

In particular, it is considered to be approximately proportional to the glass transition temperature.

In general, it can be said that resins with a glass transition temperature of 1,100°C to 20°C generally have a low ability to be dyed, and resins with a glass transition temperature of 40°C or higher generally have a high ability to be dyed.

In the present invention, the term "dispersion" refers to a liquid.
It includes both a liquid dispersion system (emulsion) and a liquid-solid dispersion system (eggplant suspension).

Preferred specific examples of the resin-water dispersion mentioned above include:
Examples include:

) Natural rubber latex (natural rubber sap concentrate) fbl Synthetic rubber latex (synthetic rubber aqueous dispersion obtained by emulsion polymerization) SBR (styrene/butadiene copolymer) latex,
Polychloroprene latex, polybutadiene latex, butyl rubber (polybutene) latex, etc.

[cl Synthetic resin emulsion (synthetic resin aqueous dispersion obtained by emulsion polymerization) Polyacrylic acid ester emulsion, polyvinyl acetate emulsion, ethylene/vinyl acetate copolymer emulsion, fostyrene emulsion, polyvinyl chloride emulsion.

idl Synthetic resin aqueous dispersion (synthetic resin aqueous dispersion obtained by dispersing a synthetic resin solution or synthetic resin melt in water) Polyester aqueous dispersion, polyurethane aqueous dispersion, polyethylene aqueous dispersion, etc.

Further, the above-mentioned aqueous resin dispersion may contain a dispersant in order to stabilize dispersion.

Preferred specific examples of the dispersant to be added include the following.

(Il Emulsifiers Anionic surfactants such as carboxylates, sulfonates, sulfate ester salts, phosphate ester salts, and phosphonates; cationic surfactants such as amine salts, quaternary ansonicum salts, phosphonates, and sulfonium salts) Surfactants, amphoteric surfactants such as betaine and sulfopetaine, and nonionic surfactants such as fatty acid monoglycerol esters and fatty acid polyglycol esters.

fill Protective colloid polyvinyl alcohol, ethylene/vinyl alcohol copolymer, polyacrylic acid, polymethacrylic acid, hydromediethyl cellulose, hydroxypropyl cellulose,
Methylcellulose, ethylcellulose, etc.

[ll Self-emulsifying resin A dispersion resin such as polar group-containing polycrethane, which has polarity itself and is localized on the particle surface to impart dispersion stability.

The composition of the above-mentioned resin aqueous dispersion is, in weight ratio, resin component 2
0 to 70 inches, more preferably 30 to 60 inches, moisture 30 to
80 inches, more preferably in the range of 40 to 70 inches.

Furthermore, the weight ratio of the dispersant to the resin component is 0.1 to 1.
0%, preferably 1 to 5%.

Various additives are added to the above #4 fat-water dispersion,
These components should be selected so as not to interfere with the fixation of dyes that migrate from the thermal transfer sheet upon heating. Examples of such additives include cured products of silicone compounds, such as epoxy-modified silicone oils, and amino acids to improve the releasability from the thermal transfer sheet.

The formation of the receptor 1 with the resin aqueous dispersion having the above composition is firstly carried out by
This is carried out by providing an aqueous resin dispersion coating on a substrate by an appropriate printing or coating method, such as wire per coating, and then drying this. The thickness of the receptor layer may be appropriately selected depending on the type of substrate, etc., but it is usually desirable that the thickness after drying be in the range of 1 to 20 μm, preferably 2 to 10 μm.

Furthermore, if necessary, a release layer may be formed on the surface of the receptor layer in order to improve the releasability from the thermal transfer sheet. As a composition that provides such mold release properties, cured products of silicone compounds, such as cured products of epoxy-modified silicone oil and amino-modified silicone oil, are preferably used. Details of each of these modified silicone oils are as described above.

The thermal transfer sheet 1 as described above is used in combination with a thermal transfer sheet. As shown in FIG. 4, a typical thermal transfer sheet 5 has a structure in which a thermal transfer sheet 7 is provided on one side of a support 6, and this thermal transfer sheet 7 is included in the thermal transfer sheet 7 when heated. The coloring material is transferred onto the heat-transferred notebook.

Examples of such coloring materials include disperse dyes, oil dyes, certain basic dyes, and intermediates that can be converted into these dyes, which have a relatively small molecular weight of approximately 150 to 400. They are selected from among these and used in consideration of thermal transfer temperature, thermal transfer efficiency, hue, color rendering, weather resistance, etc.

The above coloring material is dispersed in a suitable synthetic resin binder forming a thermal transfer layer and provided on the support 6. As such a synthetic resin binder, it is usually preferable to select one that has high heat resistance and does not hinder the migration of the coloring material that occurs when heated; for example, the following are used.

ip Cellulose resin ethyl cellulose - human mixed ethyl cellulose, ethyl hydroxy cellulose, hydroquinepropyl cellulose, methyl cellulose, cellulose acetate, cellulose acetate butyrate, etc.

(Ir) Vinyl resins polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyvinylpyrrolidone, polyester, polyacrylamide, etc.

Among the above synthetic resin binders, polyvinyl butyral resin or cellulose resin is preferred from the viewpoint of heat resistance.

To provide the thermal transfer 117 on the support 6, the coloring material and the synthetic resin binder are melted or kneaded with a diluent to form a thermal transfer coating composition, and this is applied onto the support 6 by an appropriate printing or coating method. Just set it up. Note that optional additives may be added to the coating composition for thermal transfer 1, if necessary.

The basic structure of the thermal transfer sheet is as described above,
When directly heating the surface of the support using a contact heating means such as a thermal head, as shown in FIG. By providing the lubricating agent @8 containing a mold release agent, it is possible to prevent the heating means such as a thermal head from fusing with the support and to improve the sliding properties.

The thermal transfer sheet and the thermal transfer sheet prepared as described above are stacked facing each other so that the thermal transfer field of the thermal transfer sheet and the receiving area 1 of the thermal transfer sheet are in contact with each other, as shown in FIG. By applying thermal energy in accordance with the image information to the interface, the coloring material in the thermal transfer layer can be transferred to the receiver I in accordance with the thermal energy.

Functions and Effects The thermal transfer sheet for creating transparent originals of the present invention has the above-mentioned structure, and is composed of a transparent base material and a transparent receiving layer provided thereon. By transferring the image, it can be used in an overhead projector, slide projector, etc., or as a positive or negative for diazo copying or photoengraving.

Example 1 An ink composition for forming reception 1 having the following composition was prepared, and a thickness of 1 was prepared.
Dry coating amount is 4.05'/m on 00 μm polyethylene terephthalate film (Lumirror #100 manufactured by Toshi).
It was coated to give a heat transfer sheet and then dried to obtain a heat transfer sheet.

Polyester resin: Vylon200 (Toyobo)
...... 1 part by weight Amino-modified silicone: KF~393 (Shin-Etsu Chemical) 0.03 part by weight Epoxy-modified silicone: X-22- 345 (Shin-Etsu Chemical) 0.03 parts by weight Methyl ethyl ketone/toluene/cyclohequinanone (weight ratio 4:4:2)...
...:... 90 parts by weight Next, thermal transfer 1 having the following composition
A forming ink composition was prepared, and a dry coating amount of 1. A thermal transfer sheet was obtained by coating and drying so as to give OF/-.

Disperse dye: KST-B-136 (Nippon Kayaku)...
・・・・・・・・・ 0.4 Part by weight Ethyl hydroxyethyl cellulose (Vercules) ・・・・・・・・・・・・ 0.6
! 1 part) f Luethin/toluene (weight ratio 1:1) 90 parts by weight Facing the thermal transfer of the obtained thermal transfer sheet and the receiving layer of the thermal transfer sheet. When the sheets were placed one on top of the other, heated from the thermal transfer sheet side with a thermal head to print, and then both sheets were peeled off, the receiving layer and transfer layer peeled off easily.
No peeling of the transfer layer resin to the receiving layer occurred, and a recorded image with continuous gradations was obtained.

Example 2 An ink composition for forming Reception 1 having the following composition was prepared, and applied onto the same polyethylene terephthalate film as used in Example 1 at a dry coating weight of 4.0 P/g, and dried to form Reception 1. was formed.

Polyester resin: Vylon 200 (Toyobo)
・・・・・・・・・・・・ 1.0 Part by weight Methyl ethyl ketone/toluene (weight ratio 1:1) ・・・・・・・・・・・・ 90
Parts by Weight Next, a solution for forming a mold release agent layer having the following composition was applied to the above polyester resin using a Miyapar 56 and dried at 100° C. for 5 minutes.

Amino-modified silicone: KF-393 1.0 parts by weight Evokin-modified silicone: X-22-3as...
... 1.0 parts by weight ethanol ...
25.0 parts by weight Isopropyl alcohol 23.0 parts by weight The solution for forming the release agent layer has a dry coating amount of about 0. It was applied so that it became 15f/-. When this was recorded under the same printing conditions as in Example 1, no heat fusion of the thermal transfer droplets occurred on the receiving layer, and good mold releasability was observed. It could be used as.

Example 3 A polyester solution having the same composition as in Example 2 was applied to the entire surface of an A5 size (148++ sx 210 ym) polyethylene terephthalate film (100 μm in diameter) and dried to form receptor resin 1 (dry application [4 ,OP
/fn').

Next, a release agent layer ink composition having the same composition as in Example 2,
By gravure printing method, it was applied to half the area of A6 size and dried to form mold release agent 1 (Release agent @ thickness: about 0.1μ
m).

Next, sublimation transfer recording was performed in the same manner as in the above example only on the part where the mold release agent layer was formed, and in this case as well, no flaking occurred at all in Transfer 1, indicating good mold releasability. .

Next, thermal transfer printing using wax was performed on the remaining polyester resin part using a thermal transfer printer TN5000 (Toshiba), and a clear black print was obtained, confirming the ease of addition, and it could be used as a manuscript for an overhead projector. Ta.

Example 4 An ink composition for forming a receptor layer having the following composition was prepared, and a polyethylene terephthalate film (thickness 100
μm) and dried at 100° C. for 10 minutes (dry coating 11: approximately 4.5 P/rn”).

Polyester resin: Vylon 103 (Toyobo T
g-47℃) ・・・・・・・・・・・・ 0.8 parts by weight KVA-based polymer plasticizer: Elvaloy 741P (Mitsui Polychemical Co., Ltd.
Tg--37°C)・・・・・・・・・・・・ 0,2
Part by weight Amino-modified silicone: KF857 (Shin-Etsu Chemical) ・・・・・・・・・・・・ 0.04
Part by weight Epoxy modified silicone KF103 (Shin-Etsu Chemical) ・・・・・・・・・・・・ 0.0
4 parts by weight methyl ethyl ketone/toluene/cyclohexanone (weight ratio 4:4:2)...
...90 parts by weight Next, when printing was carried out in the same manner as in Example 1, it showed good mold releasability, and no scratches occurred on the transfer layer, and the obtained material was used as a document for an overhead projector. It could be used as.

Example 5 An ink composition for forming Receipt 1 having the following composition was prepared, and a polyethylene terephthalate film (box 10
0μm) was cloth dried (Dry application method 4.Ofiζ1° polyurethane elastomer (Dainippon Ink Kagaku Bandex T5,570 Tg--55℃)...
...α5! Part polyvinyl butyral (Tanesui Kagaku, Eslec BX-ITg-83℃) ・・・・・・・・・・・・ α5 Part by weight Methyl ethyl ketone/toluene/Ethyl cellosolve (M bond ratio 4:j:2)...・・・・・・
...90 Heavy electrical part Next, a solution for forming mold release agent 1 having the same composition as in Example 2 was applied onto the receiving surface under the same conditions and dried to form a mold release agent.

When this was printed using a thermal head in the same manner as in Example 1, the transfer showed good peelability without thermal melting on the receiving surface, and the obtained material could be used as a document for an overhead projector. Ta.

~ + −−+ , −−−
V 1st period 1? -i of r is-
Na-i Momote Example 6 9 μm thick P with corona treatment on one side as a base material
Using ET film (Toyobo 1s-PET), a coating composition for a thermal transfer layer having the following composition was coated on the corona-treated film surface by wire bar coating so that the dry thickness was 1 μm. A small amount of Noricone oil (X-41/4003A, manufactured by Shin-Etsu Silicone Co., Ltd.) was applied to the back surface to perform back surface treatment, and a thermal transfer sheet was obtained.

Thermal transfer layer paint composition Disperse dye (Kayaset Blue 13 (S) manufactured by Nippon Kayaku Co., Ltd.) 4 parts by weight Ethylhydrokine Ethyl cellulose (Vercules M) S-weight Ti toluene
40 parts by weight methyl ethyl keto 7
40 parts by weight Dioxane 10 parts by weight A polyethylene terephthalate film with a thickness of 100 μm was used as a base material, and thermal transfer target 1 having the following composition was applied on the surface of this film.
The composition was coated with a wire bar coating so that the dry thickness was 5 mm to form a thermal transfer sheet.

Drying was performed at 100° C. for 1 hour after preliminary drying at around room temperature.

Coating composition for thermal transfer layer Pylon 290C (polyester resin manufactured by Toyobo Co., Ltd.) 8 parts by weight Aerosil 1
30 (fine powder silica manufactured by Nippon Aerosil: specific surface area 130d15', average particle size 16mμ) 0.4 parts by weight KF-39! + (Amino-modified silicone oil manufactured by Shin-Etsu Silicone) 0.2 parts by weight X-22-
393 (epoxy modified silicone oil manufactured by Shin-Etsu Norifun) 0.2 parts by weight Toluene 35 parts by weight Methyl ethyl ketone 35 parts by weight Cycloquinanone
30 parts by weight of the thermal transfer sheet obtained as described above and the notes to be thermally transferred were combined, and a thermal head output of 1 w/dot, a pulse width of 0, 3-4.
Thermal transfer was carried out under the conditions of 5 m sec and dot density of 1 mm, and the optical reflection density of the high color density recording area was measured using a Macbeth RD 918 reflectometer.
A value of 0 was obtained, and the manuscript could be used as an overhead projector.

When the above thermally transferred thermal transfer sheet and the polyethylene tereptate film used as the base material of the thermal transfer sheet were stacked together and left to stand for 60 hours under a load of 10 P/d, it was found that the transfer of dye from the thermal transfer sheet resulted in No contamination of the polyethylene terephthalate film was observed.

Comparative Example 1 A thermal transfer sheet similar to that obtained in Example 6 and a thermal transfer sheet produced in the same manner as in Example 6 except that fine powder silica was excluded from the coating composition for thermal transfer target 1 in Example 1. When thermal transfer was carried out in the same manner as in Example 6, a value of 2.2 was obtained as the optical reflection density of the high color density recording area.

When the above heat-transferred thermal transfer sheet and the polyethylene terephthalate film used as the base material of the thermal transfer sheet in Example 6 were overlapped and left to stand under the same conditions as in Example 6, the thermal transfer sheet was separated from the thermal transfer sheet. The contamination of the polyethylene terephtate film due to dye migration was significant.

Comparative Example 2 A thermal transfer notebook was prepared in the same manner as in Example 6, and in Example 6, Aerosil 680 (fine powder manufactured by Nippon Aerosil) was used instead of Aerosil 130 as the fine powder silica in the coating composition for thermal transfer target 1. Thermal transfer was performed in the same manner as in Example 6 in combination with a thermally transferred notebook prepared in the same manner as in Example 6, except that silica particles (average particle diameter of approximately 7 mμ, specific surface area of 380Fd151'-) were used. As a result, the optical reflection density of the high color density recording area was 2.
A value of 3 was obtained, and the manuscript could be used as an overhead projector.

When the above-mentioned heat-transferred notebook and the polyethylene terephthalate film used as the base material of the heat-transfer sheet in Example 6 were superimposed and left to stand under the same conditions as in Example 6, the dye from the heat-transfer sheet was removed. Contamination of polyethylene terephthalate due to migration was significant.

Example 7 A thermal transfer sheet similar to that obtained in Example 6 and the same weight part of 7 Aerosil ox instead of Aerosil 130 as fine powder silica in the coating composition for the thermal transfer layer in Example B.
50 (Nippon Aerosil Fine Powder Silicani Average Particle Size Approximately 40
Example 6 except that mμ, specific surface area 5[]m/P) was used.
and a heat transfer sheet obtained in the same manner,
When thermal transfer was carried out in the same manner as in Example 6, an optical reflection density of 1.5 was obtained in the high color density recording area, and it could be used as an original for an overhead projector.

When the above thermally transferred thermal transfer sheet and the polyethylene terephthalate film used as the base material of the thermal transfer sheet in Example 6 were superimposed and left to stand under the same conditions as in Example 6, the transfer of dye from the thermal transfer sheet resulted in Contamination of the polyethylene terephthalate film was rarely observed.

Example 8 A 100 μm polyethylene terephthalate film was used as a base material, and a heat transfer sheet 1 was prepared by applying a coating composition for thermal transfer 1 having the following composition on the surface using wire par coating so that the dry thickness was 7 μm. Formed.

Drying was carried out at 100' for 1 hour after preliminary drying at around room temperature.

Coating composition for thermal transfer ESLETSUKU BX-1 (Tanezu Chemical Co., Ltd. butyral resin) 8 parts by weight Aerosil 2
00 (Nippon Aerosil fine powder silica: specific surface area 200 fn" IP, average particle size 12 mμ) 0.8 parts by weight KF-393 (Shin-Etsu Silicon amino-modified silicone oil) 0.2 parts by weight X-22-293 (Shin-Etsu Silicon) Evokin modified silicone oil) □ 0.2 parts by weight Toluene 55 parts by weight Methyl ethyl ketone
35 parts by weight cyclohexanone 30
A thermal transfer sheet similar to that obtained in Example 6 by weight,
When thermal transfer was carried out in the same manner as in Example 6 using the above thermal transfer sheet in combination, a value of 1.8 was obtained as an optical reflection density in a high color density area, and the document could be used as an overhead projector manuscript.

When the above heat-transferred thermal transfer sheet and the polyethylene terephthalate film used as the base material of the thermal transfer sheet were overlapped and left to stand under the same conditions as in Example 6, the polyethylene terephthalate film was formed due to the transfer of dye from the thermal transfer notebook. No contamination was observed.

Comparative Example 3 A thermal transfer sheet similar to that obtained in Example 6 and a thermal transfer sheet obtained in the same manner as in Example 7 except that fine powder silica was excluded from the coating composition for thermal transfer target 1 in Example 7. When thermal transfer was performed in the same manner as in Example 6 using the sheet, the optical reflection density of the high color density recording area was 17.
The value was obtained.

When the polyethylene terephthalate film was superimposed and left to stand under the same conditions as in Example 6, the polyethylene terephthalate film was noticeably contaminated due to transfer of dye from the thermal transfer sheet.

Example 9 In Example 6, 2.5 was used instead of Nippon Kayaku Kayaset Blue 136 as a disperse dye in the coating composition for thermal transfer 1.
A thermal transfer sheet was obtained in the same manner as in Example 6 except that part by weight of Nippon Kayaku Kayaset Red B was used.

A 100 μm polyethylene terephthalate film was used as a base material, and a heat transfer coating composition having the following composition was coated on the surface of the film by wire bar coating to a dry thickness of 5 μm to form a heat transfer sheet.

Drying was carried out at IOO'C for 1 hour after preliminary drying at around room temperature.

Coating composition for thermal transfer layer Pylon 200 (polyester resin manufactured by Toyobo Co., Ltd.) 4 parts by weight Pylon 29
0 (Polyester resin manufactured by Toyobo) 4 parts by weight Aerosil R
972 (fine powder silica made by Nippon Aerosil: specific surface area 110Fd/P, average particle size 16 mμ) 0.6 parts by weight KF-393 (amino-modified silicone oil made by Shin-Etsu Nuricon) 0.2 parts by weight X-22-295 (Shin-Etsu Silicone Epokin modified silicone oil) 0.2 parts by weight Toluene 35 parts by weight Methyl ethyl ketone 35 parts by weight Cyclohexanone
When the thermal transfer sheet obtained in the above manner and the thermal transfer sheet were combined to form a thermal transfer sheet in the same manner as in Example 6, the optical reflection density of the high color density area was 1. A value of 1 was obtained, and the manuscript could be used as an overhead projector.

When the above thermally transferred thermal transfer sheet and the polyethylene terephthalate film used as the base material of the thermal transfer sheet in Example 6 were stacked and left to stand under the same conditions as in Example 6, dye transfer from the thermal transfer sheet was observed. No contamination of the polyethylene terephthalate film was observed.

Example 10 9 pm thick P with corona treatment on one side as base material
Using an ET film (5-PET manufactured by Toyobo Co., Ltd.), a dye composition for a thermal transfer layer of the following composition was coated on the corona-treated film surface by wire bar coating so that the dry thickness was 1 μm. Then, a small amount of Nonricorn Oil (X-41/do03A, manufactured by Shin-Etsu Silicone Co., Ltd.) was applied to the back surface for back surface treatment to obtain a thermal transfer sheet.

Thermal transfer @ Paint composition Dispersed dye (Nippon Kayaku Kayaset Blue 136) 4 parts by weight Ethyl hydroxyethyl cellulose (Vercules V) 5its toluene
40 parts by weight methyl ethyl ketone
40 parts by weight Diochitin 10 parts by weight A 100 μm polyethylene terephthalate film was used as a base material, and a coating composition for a thermal transfer layer having the following composition was applied on the surface of the film by wire coating so that the dry thickness was 7 μm. It was dried at ℃ for 1 hour.

Coating composition for thermal transfer layer Pyronal MO-120075 parts by weight (polyester resin manufactured by Toyobo Co., Ltd.) (estimated solid content) Izerax S-10
40 (Polyurethane 25 weight part dispersion manufactured by Hoya Chemical Co., Ltd.)
(Estimation of solid content) Next, a mold release coating composition having the following composition was coated on the surface of the receiving layer formed as described above by wire par coating so that the dry thickness was 0.2 μm (= coating A thermal transfer sheet was formed by drying at 100° C. for 1 hour.

Release paint composition KF-393 (amino-modified silicone oil manufactured by Shin-Etsu Nuricon) 3 parts by weight X-22-
395 (epoxy-modified silicone oil manufactured by Shin-Etsu Silicone Co., Ltd.) 5 parts by weight Ethyl alcohol 100 parts by weight The thermal transfer sheet obtained as described above and the sheet to be thermally transferred are combined, and the output IW/dots and pulses of the thermal head are measured using a thermal transfer printer. Thermal transfer was performed under the following conditions: width 0, 3-4.5 m sec, dot density 5 dots/g
When the optical reflection density of the high color density recording area was measured using a reflection densitometer, a value of 2.1 was obtained, and the original could be used as an overhead projector.

When the above thermally transferred thermal transfer sheet and the synthetic paper used as the base material of the thermal transfer sheet were stacked together and left to stand at 60°C for 60 hours under a load of 10 l/crn, the dye from the thermal transfer sheet was removed. No contamination of the synthetic paper due to migration was observed. Further, no disturbance of the thermally transferred image due to diffusion of the dye inside the thermally transferred sheet was observed.

Example 11 A thermal transfer sheet similar to that obtained in Example 10 was obtained in the same manner as in Example 1 except that Pyrocal MD-1200 was excluded from the coating composition for the layer to be thermally transferred in Example 10. Example 1 in combination with a thermal transfer sheet
When thermal transfer was carried out in the same manner as in Example 0, an optical reflection density of 2.0 was obtained in the high color density recording area, and it could be used as an original for an overhead projector.

When the above heat-transferred heat-transfer sheet and the synthetic paper used as the base material of the heat-transfer sheet in Example 10 were superimposed and left to stand under the same conditions as in Example 10, it was found that the transfer of dye from the heat-transfer notebook caused Although no staining of the synthetic paper was observed, some disturbance of the thermally transferred image was observed due to diffusion of the dye inside the thermally transferred sheet.

Example 12 In Example 10, 2,5 was used instead of Nippon Kayaku Cassette Blue 136 as a disperse dye in the coating composition for the thermal transfer layer.
A thermal transfer sheet was obtained in the same manner as in Example 10 except that part by weight of Cassette Red B manufactured by Nippon Kayaku was used.

A thermal transfer sheet was formed in the same manner as in Example 10, except that the composition of the coating composition for the thermal transfer layer was changed as described below.

Coating Composition for Heat Transfer Layer (Aqueous Dispersion) Ril-based Emulsion) The heat transfer sheet obtained as described above and the heat transfer sheet were combined and thermal transfer was performed in the same manner as in Example 10, resulting in a high color density. 1.2 as the optical reflection density of
This value was obtained, and the manuscript could be used as an overhead projector.

When the thermal transfer sheet was left to stand under the same conditions as in Example 10, the synthetic paper was contaminated due to transfer of dye from the thermal transfer sheet, and the thermally transferred image was disturbed due to dye diffusion inside the thermal transfer notebook. was not recognized.

Example 13 A thermal transfer sheet similar to that obtained in Example 10, and a thermal transfer sheet obtained in the same manner as in Example 10 except that the composition of the coating composition for the layer to be thermally transferred in Example 10 was changed as follows. When thermal transfer was carried out in the same manner as in Example 10, a value of 1.8 was obtained as the optical reflection density of the high color density recording area, and it could be used as a document for an overhead projector.

Coating composition for thermal transfer layer Acronal YJ-2730D 33 parts by weight (Oilized perdice cracker (solid carrier) grill emulsion) Vinizol DU-23067 parts by weight (Daido Kasei polyurethane (solid carrier) aqueous dispersion) The above thermal transfer When the finished thermal transfer sheet and the polyethylene terephthalate film used as the base material of the thermal transfer notebook in Example 10 were superimposed and left to stand under the same conditions as in Example 10, the polyethylene terephthalate film was removed due to the transfer of dye from the thermal transfer sheet. No disturbance of the thermally transferred image due to contamination inside the thermally transferred sheet was observed due to the contamination of the film.

Example 14 A thermal transfer sheet similar to that obtained in Example 12 and a thermal transfer sheet obtained in the same manner as in Example 10 except that the composition of the coating composition for the layer to be thermally transferred in Example 10 was changed as follows. When thermal transfer was performed in the same manner as in Example 10 using the sheet, the optical reflection density of the high color density recording area was obtained as 1.1, and it could be used as a manuscript for an overhead projector. .

Coating composition for thermal transfer layer Eye Lux S-01806 (aqueous dispersion of polyurethane (solid carrier) manufactured by Hodogaya Chemical Co., Ltd.) Eye Lux S-404ON 35 parts by weight (polyurethane (solid carrier) manufactured by Hodogaya Chemical Co., Ltd.) Aqueous dispersion) When the above thermally transferred thermal transfer sheet and the synthetic paper used as the base material of the thermal transfer sheet in Example 10 were combined and left to stand under the same conditions as in Example 10, the dye from the thermal transfer sheet was Contamination of the synthetic paper due to migration of dye and diffusion of dye inside the thermal transfer sheet: No disturbance of the thermally transferred image was observed.

[Brief explanation of the drawing]

Figures 1 to 3 are cross-sectional views showing a plate thermal transfer sheet for creating transparent originals according to the present invention, Figures 4 and 5 are cross-sectional views showing a thermal transfer sheet, and Figure 6 is a cross-sectional view of a thermal transfer sheet for creating transparent manuscripts of the present invention. FIG. 2 is a cross-sectional view showing a state in which a thermal transfer sheet and a thermal transfer sheet for creating a transparent original are overlapped. 1・・・・・・・・・・・・・・・Thermal transfer notebook for creating transparent manuscripts 2・・・・・・・・・・・・・・・Transparent base material 3.
・・・・・・・・・・・・・・・Acceptance asthma 4・・・・・・
・・・・・・・・・Mold release agent layer 5・・・・・・・・・
・・・・・・・・・Thermal transfer sheet 6・・・・・・・・・・・・
......Support 7...Thermal transfer layer 8...Smooth layer Fig. 1 1 Cover for creating transparent original Thermal transfer sheet Figure 2 Figure 3 Figure 4 Figure 5 To the heat transfer sheet 5 Figure 5 Figure 6

Claims (4)

[Claims] (1) A cover for creating a transparent original, comprising a transparent base material and a transparent receptor layer provided on the transparent base material, which receives dyes that migrate from the thermal transfer sheet when heated. Heat transfer sheet. (2) Claim 1, characterized in that a dye-permeable mold release agent is contained on the surface or inside of the receptor layer.
Thermal transfer sheet for creating transparent manuscripts as described in section. (3) The transmission according to claim 1 or 2, characterized in that the receptor layer contains silica powder with an average particle diameter of 10 to 100 mμ and a comparative surface roughness of less than 250 g/m^2. Thermal transfer sheet for manuscript creation. (4) The receptor layer is formed by providing a dispersion coating film made of at least one type of resin and water on the base material and drying it. Thermal transfer sheet for creating transparent manuscripts as described in item 1.