JP2879823B2 - Sublimation type thermal transfer recording image receiving medium - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sublimation type thermal transfer recording image receiving medium used in combination with a thermal transfer recording medium having a transfer layer containing a thermal sublimation dye.

[Conventional technology]

In recent years, the demand for full-color printers has been increasing year by year, and the recording methods of these full-color printers include an electrophotographic method, an ink jet method, and a thermal transfer method. Of these, the thermal transfer method is often used because of easy maintenance and no noise. Used.

This thermal transfer method is based on a thermal transfer recording medium (color ink sheet) in which a colorant is dispersed in a heat-fusible substance or an ink layer in which a sublimable dye is dispersed in a resin binder is provided on a substrate. An image receiving medium (image receiving sheet) is superimposed on the ink layer surface, and thermal energy controlled by an electric signal of a laser, a thermal head, or the like is applied from the recording medium side, and the ink in that portion is thermally melt-transferred or sublimated onto the image receiving sheet. This is a recording method for forming an image by shifting.

The thermal transfer recording method is roughly classified into a heat-melt transfer type and a sublimation transfer type according to the type of recording medium to be used. Has the advantage of being able to easily obtain a halftone because of sublimation in a monomolecular state and to be able to control the gradation at will, and is considered to be the method most suitable for a full-color printer.

However, in this sublimation type thermal transfer recording system, a color ink sheet is used as a recording supply, and heat recording is selectively performed according to an image signal. In order to obtain one full-color image, yellow, magenta, cyan, (black) )
This method has a drawback that the running cost is high because the ink sheets are used one by one and discarded even if there is an unused portion thereafter.

Therefore, in order to improve this drawback, the speed of the image receiving sheet is set to n times (n
> 1), an n-fold mode method is used in which printing is repeated while both sheets are running. The n-times mode method prints a large number of times with one ink sheet by a relative speed method in which the overlap between the previous use portion and the later use portion of the ink layer is gradually shifted. is there. Further, from the viewpoint of material, an attempt has been made to replace the image receiving substrate with paper such as gravure paper from conventional synthetic paper.

[Problems to be solved by the invention]

However, in the conventional sublimation type thermal transfer recording method, an image receiving medium has been used in which a dye receiving layer formed of a thermoplastic polyester resin or the like showing strong dyeing properties to a sublimation dye is formed on a substrate. However, such an image receiving medium does not have sufficient hardness, friction resistance, and releasability. Particularly, in the n-times mode method, a strong frictional force is applied between the transfer recording medium and the image receiving medium. May wake or break. In detail, in the n-times mode method, the ratio of changing the ratio of the moving speed of the moving velocity [V _1] and the image-receiving medium transfer recording medium [V _2], n = [V _2] / [V _1] Is larger, the number of sheets (n) that can be printed on one transfer recording medium becomes larger, which is preferable. However, at the time of printing, friction occurs because the speeds of the transfer recording medium and the image receiving medium are different, and a larger force is applied as n increases, and fusion and breakage are likely to occur. It can be said that the more printable even if n is large, the more preferable image receiving medium.

Further, the conventional image receiving medium has a drawback that if the substrate is made of paper, the adhesion between the transfer recording medium and the image receiving medium is insufficient, so that a point where the dye is not transferred (so-called white spot) occurs.

Accordingly, the present invention provides a peeling method which can be used in an n-times mode method in which an image has high density, high light resistance, and high preservability, and further requires a higher peeling property than a normal sublimation type thermal transfer recording method. It is a first object of the present invention to provide a sublimation type thermal transfer recording image receiving medium having excellent performance, and to provide a sublimation type thermal transfer recording image receiving medium which does not cause whitening even when the substrate is paper. This is the purpose of 2.

[Means for solving the problem]

According to the present invention, in a sublimation type thermal transfer recording image receiving medium having a dye receiving layer capable of dyeing a sublimation dye on a substrate,
Sublimation type thermal transfer recording image receiving medium, characterized in that the receiving layer is formed from a copolymer containing vinyl chloride, vinyl acetate and a polymerizable unsaturated carboxylic acid as monomer units and an isocyanate compound. Further, there is provided an image receiving medium for sublimation type thermal transfer recording comprising an elastic layer provided between a substrate and the dye receiving layer, and the dye receiving layer further comprises vinyl chloride, vinyl acetate and a polymerized unsaturated carboxylic acid as monomer units. The present invention provides a sublimation type thermal transfer recording image receiving medium, which is obtained by laminating a layer formed of a copolymer containing isocyanate and an isocyanate compound and a layer mainly containing a vinyl chloride resin in this order.

That is, the image-receiving medium for sublimation-type thermal transfer recording of the present invention comprises, on a substrate, a copolymer (hereinafter simply referred to as COOH) containing vinyl chloride, vinyl acetate, and a polymerizable unsaturated carboxylic acid as monomer units.
A vinyl chloride resin containing a group) and a dye receiving layer formed from an isocyanate compound.
It has excellent properties of light resistance and preservability, and furthermore, the curing reaction by the COOH group and the isocyanate compound further improves the hardness, abrasion resistance and releasability, and between the substrate and the dye receiving layer. By using a configuration having an elastic layer, even when paper is used as the substrate, the adhesiveness is good and the whitening does not occur.Furthermore, the dye receiving layer is a vinyl chloride resin containing a COOH group. And a layer composed mainly of a vinyl chloride-based resin and a layer formed from the isocyanate compound and the isocyanate compound in this order, the friction resistance of the surface is further improved remarkably.

Next, the present invention will be described with reference to the drawings. The specific configuration and operation of the present invention are as follows.

In FIG. 1, the image receiving medium of the present invention comprises an image receiving substrate A and a dye receiving layer B. That is, the image receiving medium of the present invention has a structure in which a dye receiving layer B mainly composed of a vinyl chloride resin containing a COOH group and an isocyanate compound is coated on an image receiving substrate A. Reference numeral 1 denotes a thermal head, and the sublimation thermal transfer recording medium includes a heat resistant layer 2, a transfer substrate 3, and a dye transfer layer 4.

By the heating from the thermal head 1, the sublimable dye sublimates and diffuses from the dye transfer layer 4 of the sublimation thermal transfer recording medium, and the sublimated dye is transferred to the dye receiving layer B of the image receiving medium. The sublimation dye transferred to the image receiving medium diffuses and dyes in the dye-dyeable resin forming the dye-receiving layer B.

In the image receiving medium of the present invention, the dye receiving layer B is formed from a vinyl chloride resin containing a COOH group and an isocyanate compound. Good image quality, high image density, high light fastness and high storability can be obtained, and the curing reaction between the contained COOH group and the isocyanate compound further improves hardness, abrasion resistance and peelability. And
Even in the n-fold mode method, no fusion or breakage occurs.

In the present invention, the image receiving medium A and the dye receiving layer B
And an elastic layer C can be provided between them. The case where the elastic layer C is provided is shown in FIG. In this case, the elastic layer C
For this reason, even when gravure paper or the like is used as the substrate A, pressure is applied uniformly during recording, and good adhesion to the transfer recording medium is obtained, and a high-density image without whitening can be obtained. .

Further, in the present invention, the dye receiving layer is formed of a layer formed from a vinyl chloride resin containing a COOH group and an isocyanate compound (curing receiving layer) and a layer mainly containing a vinyl chloride resin (surface dye receiving layer). Layer).

The case where the dye receiving layer has a laminated structure is shown, for example, in FIG. That is, in FIG. 3, the second dye-receiving layer B in Figure, the cured receptive layer B ₁ mainly composed of vinyl chloride resin and an isocyanate compound containing a COOH group, vinyl chloride-based laminated thereon that it consists laminates of surface dye receiving layer B ₂ of the resin as a main component is different from the case of FIG. 2. In this case, the dye sublimated from the dye transfer layer 4 sublimation thermal transfer recording medium is being dyed mainly on the surface dye receiving layer B ₂ of the image receiving medium, by which a two-layer, the hardness of the receiving layer At the same time, the friction resistance of the surface is significantly improved. This release agent such as silicone oil in the surface dye receiving layer B ₂ is cured receptive layer B ₁ that is, becomes easy to be concentrated near the surface, appears to be due to the effect is increased.

Dye receiving layer B of the present invention (curing receiving layer in the case of a laminated structure)
The vinyl chloride resin containing a COOH group used in B ₁ ) is a copolymer containing vinyl chloride, vinyl acetate, and a polymerizable unsaturated carboxylic acid as main monomers. The main component is a polymerizable unsaturated carboxylic acid as a secondary component. In this case, examples of the polymerizable unsaturated carboxylic acid include acrylic acid, methacrylic acid, and maleic acid. In addition, in addition to vinyl chloride and a polymerizable unsaturated carboxylic acid, this copolymer further contains other comonomers, for example, vinyl alcohol derivatives such as vinyl acetate and vinyl propionate; methyl acrylate, ethyl acrylate, (Meth) acrylic acid derivatives such as butyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, and 2-hydroxyethyl methacrylate; maleic acid derivatives such as diethyl maleate and dibutyl maleate: methyl vinyl ether, ethyl vinyl ether And vinyl ether derivatives such as butyl vinyl ether; and olefins such as ethylene and propylene.

The proportion of the monomers in the copolymer was 60 to 90% by weight of vinyl chloride, 0.5 to 5% by weight of polymerizable unsaturated carboxylic acid, and 5 to 5% by weight of components other than vinyl chloride and polymerizable unsaturated carboxylic acid. About 39.5% by weight is preferred.

Preferred specific examples of the copolymer include the following.

Vinyl chloride / vinyl acetate / maleic acid copolymer, vinyl chloride / vinyl acetate / maleic acid copolymer, all of which use vinyl chloride / vinyl acetate / maleic acid copolymer . Examples of commercially available products include VMCH and VMCC manufactured by Union Carbide, and Denka Vinyl 1000C, 1000CS, 1000CK manufactured by Denki Kagaku Kogyo.

The isocyanate compound used in the dye-receiving layer B of the present invention (the curing-receiving layer B _{1 in} the case of a laminated structure) includes tolylene diisocyanate, hexamethylene diisocyanate, 4,4-diphenylmethane diisocyanate, and triphenylmethane triisocyanate. Various isocyanate compounds such as hexanetriol and the like can also be used. In addition,
The use ratio of the vinyl chloride resin containing a COOH group and the isocyanate compound is preferably in the range of 0.2 to 2.0 in terms of the molar ratio of NCO / COOH.

As the vinyl chloride resin used in the surface dye receptive layer B ₂ in the case of a laminated structure, for example, it includes such vinyl chloride / vinyl acetate copolymer, those vinyl chloride component is more than 80 wt% preferable. Commercial products include, for example, Union Carbide's VYHH, VYNS, VYHD, VYLF
Denka Vinyl 1000MT, 1000A, 1
000L, 1000D, MHE100, ME120 and the like.

The dye receiving layer B of the present invention (the curing receiving layer B _{1 in} the case of a laminated structure) contains a conventionally known dyeing resin, for example, a polyester resin, a polycarbonate resin, a styrene resin, a silicone resin, or the like. In particular, in the case of a single-layer constitution, it is preferable to contain a vinyl chloride resin.

In addition, a releasing agent such as amino-modified silicone, epoxy-modified silicone, and alkyd-modified silicone can be contained in the dye-receiving layer B (the surface dye-receiving layer B _{2 in} the case of a laminated structure). By using these silicones,
The thermal fusion prevention curing with the transfer recording medium is further improved. The addition amount is preferably 10% by weight or less based on the resin amount of the receiving layer.

Note that a filler can be contained in the dye receiving layer. Examples of the filler include white pigments such as silica, titanium oxide, and calcium carbonate. The amount of the filler is preferably 5 to 60% by weight based on the resin amount of the receiving layer. In addition, these layers may appropriately contain a surfactant, an ultraviolet absorber, an antioxidant, and the like.

When the elastic layer C is provided on the base A in the image receiving medium of the present invention, the material constituting the layer may be a rubber such as butadiene rubber, urethane rubber, styrene butadiene rubber, silicone rubber, chloroprene rubber, or acrylic rubber. Those having elasticity are mentioned.

In addition, as the substrate A in the image receiving medium of the present invention, synthetic paper, baryta paper, art paper, coated paper, gravure paper,
A plastic film or the like is preferably used alone or in a laminate thereof. In the image receiving medium of the present invention, since the dye receiving layer B (the curing receiving layer B _{1 in} the case of a laminated structure) contains a COOH group to improve the adhesion, the conventional dye receiving layer has low adhesion. Even baryta paper and plastic film can maintain sufficient adhesive strength and can be used satisfactorily.

Further, in the conventional image receiving medium, when a paper such as gravure paper is used as the base, the adhesion to the transfer recording medium is insufficient, and whitening occurs in the image, or the image density is reduced. In particular, in the present invention, when an elastic layer is provided between the substrate and the dye receiving layer, pressure is applied uniformly during recording, and a high image density without whitening can be obtained.

The thickness of the elastic layer and the dye receiving layer is preferably about 1 to 10 μm.

〔The invention's effect〕

Since the image receiving medium for sublimation type thermal transfer recording of the present invention has the above-described configuration, the image receiving medium according to claim 1 has the following features: (a) no thermal fusion during recording; Even in the system, no fusing, breakage, etc. occur. (B) An image with high image density, high light fastness and high storage stability can be obtained. (C) Even when baryta paper or a plastic film is used as the substrate, It has an outstanding effect of maintaining sufficient adhesive strength.

Further, in the image receiving medium of claim (2), (d) even when paper such as gravure paper is used as the substrate,
This has the additional effect that the adhesiveness to the transfer recording medium is good and a high-density image without whitening can be obtained.

 Further, in the image receiving medium of claim (3), there is an additional effect that (e) the friction resistance is further improved.

〔Example〕

Next, the present invention will be described in more detail by way of examples. In addition, all the parts shown below are based on weight.

Example 1 A mixture having the following composition was sufficiently mixed and dispersed to prepare a dye receiving layer coating solution [Solution A].

[A liquid]

Vinyl chloride / vinyl acetate / maleic acid 10 parts Copolymer (trade name: VMCH; manufactured by Union Carbide) Isocyanate (trade name: Coronate L; manufactured by Nippon Polyurethane Industry) 5 parts Amino-modified silicone 0.5 part (trade name: SF-8417; 0.5 parts of epoxy-modified silicone (manufactured by Toray Silicone Co., Ltd.) (product name: SF-8411; manufactured by Toray Silicone Co., Ltd.) 40 parts of toluene 40 parts of methyl ethyl ketone Next, [solution A] was used for the thickness of about 150 μm using a wire bar.
m on synthetic paper (trade name: Yupo FPG-150; manufactured by Oji Yuka Synthetic Paper Co., Ltd.) and dried at a drying temperature of 75 ° C. for 1 minute to form a dye receiving layer having a thickness of about 5 μm. Further, the mixture was stored at 80 ° C. for 3 hours and cured to prepare an image receiving medium of the present invention.

On the other hand, as a sublimation transfer recording medium, a 6 μm thick silicone cured resin film (about 1 μm thick) was provided as a back layer.
On a PET film, a coating solution [solution B] for an ink layer (ie, a dye transfer layer) having the following formulation was applied to a thickness of about 2 μm,
A transfer recording medium was obtained.

[B liquid]

Polyvinyl butyral 10 parts (trade name BX-1; manufactured by Sekisui Chemical Co., Ltd.) Sublimation disperse dye for cyan 6 parts (trade name Kayaset 714: manufactured by Nippon Kayaku Co., Ltd.) Methyl ethyl ketone 45 parts Toluene 45 parts The obtained transfer recording medium and image receiving medium Were superposed such that the ink layer of the transfer recording medium and the dye receiving layer of the image receiving medium faced each other, and image recording was performed by changing the heating energy from the back of the transfer recording medium with a thermal head. Here, recording was performed under the condition that the speed ratio between the transfer recording medium and the image receiving medium was n = 10. The recording density of the thermal head was 6 dots / mm, and the recording output was 0.42 W / dot.

Example 2 In Example 1, instead of [Solution A], the following [Solution C] was used.
An image receiving medium of the present invention was prepared in the same manner as in Example 1 except that the following was used.

[Liquid C]

 Vinyl chloride / vinyl acetate / maleic acid 7 parts Copolymer (trade name VMCC; manufactured by Union Carbide) Vinyl chloride / vinyl acetate copolymer 7 parts (trade name VYHH; manufactured by Union Carbide) Isocyanate 3 parts (trade name Coronate) L; Nippon Polyurethane Industry Co., Ltd.) Amino-modified silicone 0.5 part (trade name: SF8417; Toray Silicone Co., Ltd.) Epoxy-modified silicone 0.5 part (trade name: SF8411; Toray Silicone Co., Ltd.) Toluene 40 parts Methyl ethyl ketone 40 parts Image recording was performed in the same manner as described above.

Comparative Example 1 A comparative image-receiving medium was prepared in the same manner as in Example 1 except that the following [Solution D] was used as the coating solution for the dye-receiving layer.
In addition, an image was recorded.

[D liquid]

Polyester resin 10 parts (trade name: Byron 200; manufactured by Toyobo Co., Ltd.) Amino-modified silicone 0.1 part (trade name: SF8417; manufactured by Toray Silicone Co., Ltd.) Epoxy-modified silicone 0.1 part (trade name: SF8411; manufactured by Toray Silicone Co., Ltd.) Toluene 40 parts Methyl ethyl ketone 40 Part Comparative Example 2 A comparative image receiving medium was prepared and an image was recorded in the same manner as in Comparative Example 1, except that the following [Solution E] was used instead of [Solution D].

[E liquid]

Vinyl chloride / vinyl acetate copolymer 10 parts (trade name: VYHH; manufactured by Union Carbide) Amino-modified silicone 0.1 parts (trade name: SF8417; manufactured by Toray Silicone Co.) Epoxy-modified silicone 0.1 part (trade name: SF8411; manufactured by Toray Silicone Co., Ltd.) Toluene 40 parts Methyl ethyl ketone 40 parts or more The surface of the transfer recording medium and the image receiving medium after image recording was visually observed. Table 1 shows the results.

Example 3 A mixture having the following composition was sufficiently mixed and dispersed to prepare a coating liquid for elastic layer [Solution F] and a coating liquid for dye receiving layer [Solution G].

[F liquid]

Styrene / butadiene copolymer 50 parts (trade name: Polyrac 750; manufactured by Mitsui Toatsu Co.) Water 50 parts [Solution G] Vinyl chloride / vinyl acetate / maleic acid 7 parts copolymer (trade name: VMCH; manufactured by Union Carbide) Vinyl chloride / vinyl acetate copolymer 7 parts (trade name VYHH; manufactured by Union Carbide) Silicone oil 1 part (trade name KF393; manufactured by Shin-Etsu Chemical Co., Ltd.) Isocyanate (trade name Coronate L; 1 part manufactured by Nippon Polyurethane Industry) Toluene 40 parts Methyl ethyl ketone 40 parts Next, using a wire bar, apply [Solution F] to a thickness of about 60 μm.
On kravia paper (made by Honshu Paper Co., Ltd.) and a thickness of about 2μ
After forming an elastic layer of m, [Solution G] was applied on the elastic layer using a wire bar to form a dye receiving layer having a thickness of about 3 μm, thereby preparing an image receiving medium of the present invention.

The obtained image receiving medium and the same transfer recording medium as obtained in Example 1 were overlapped so that the ink layer of the transfer recording medium and the dye receiving layer of the image receiving medium faced each other. Change the heating energy with the head,
Perform image recording, observe the presence or absence of heat fusion by changing the speed ratio between the transfer recording medium and the image receiving medium, observe the image after recording (whether there is no white spot), and perform the light resistance and storage stability test of the image. Done. The recording density of the thermal head is 6 dots / m
m, and the recording output was 0.42 W / dot.

Example 4 An image receiving medium of the present invention was prepared in the same manner as in Example 3 except that [F Solution] and [G Solution] were replaced by the following [H Solution] and [I Solution], respectively. It was created.

[H liquid]

Silicone rubber (trade name: DX35-203A; manufactured by Toray Silicone Co., Ltd.) [Solution I] Vinyl chloride / vinyl acetate / maleic acid 10 parts copolymer (trade name: VMCC; manufactured by Union Carbide Co.) Vinyl chloride / vinyl acetate copolymer 10 Part (VYNS; manufactured by Union Carbide) Isocyanate 1 part (brand name: Coronate L; manufactured by Nippon Polyurethane Industry Co., Ltd.) Silicone oil 0.5 part (brand name: SF8417; manufactured by Toray Silicone) Silicone oil (brand name: SF8411; Toray Silicone Then, image recording was performed in the same manner as in Example 3, and observation of the presence or absence of heat fusion, light resistance test, and the like were performed.

Example 5 Instead of the dye receiving layer coating liquid [solution G] in Example 3, the following curing receiving layer coating liquid [solution J] and surface dye receiving layer coating liquid [liquid K] were used. Except that a [liquid J] was applied to form a hardening receiving layer having a thickness of about 2 μm, and then a [liquid K] was coated on the hardening receiving layer to form a surface dye receiving layer having a thickness of about 2 μm. In the same manner as in Example 3, an image receiving medium of the present invention was prepared.

[J liquid]

Vinyl chloride / vinyl acetate / maleic acid 10 parts Copolymer (trade name VMCH; manufactured by Union Carbide Co.) Isocyanate (trade name Coronate L; 1 part manufactured by Nippon Polyurethane Industry Co., Ltd.) Toluene 40 parts Methyl ethyl ketone 40 parts [Solution K] Vinyl chloride / Vinyl acetate copolymer 10 parts (trade name VYHH; manufactured by Union Carbide Co.) Silicone oil 0.2 parts (trade name SF8417; manufactured by Siren Silicone Co.) Toluene 40 parts Methyl ethyl ketone 40 parts Subsequently, image recording was performed in the same manner as in Example 3. , And observation of the presence or absence of heat fusion, light resistance test, and the like were performed.

Comparative Example 3 An image receiving medium for comparison was prepared and image recording was performed in the same manner as in Example 3, except that the following [Liquid L] was used as the coating liquid for the dye receiving layer and the elastic layer was not provided, and an image was recorded. Observation of the presence or absence of fusion and a light resistance test were performed.

[L liquid]

Polyester resin 10 parts (trade name Byron 200; manufactured by Toyobo Co., Ltd.) Silicone oil 1 part (trade name KF393; manufactured by Shin-Etsu Chemical Co., Ltd.) Toluene 40 parts Methyl ethyl ketone 40 parts Comparative Example 4 In Comparative Example 3, instead of [Liquid L] An image receiving medium for comparison was prepared and image recording was performed in the same manner as in Comparative Example 3 except that the following [M solution] was used, and observation of the presence or absence of heat fusion, light resistance test, and the like were performed.

[M liquid]

Vinyl chloride / vinyl acetate copolymer 10 parts (trade name VYHH; manufactured by Union Carbide) Silicone oil 1 part (trade name KF393; manufactured by Shin-Etsu Chemical Co., Ltd.) Toluene 40 parts Methyl ethyl ketone 40 parts Comparative Example 5 As coating liquid for dye receiving layer An image receiving medium for comparison was prepared in the same manner as in Example 3 except that the above [M solution] was used.
In addition, image recording was performed, and observation of the presence or absence of heat fusion, light resistance test, and the like were performed.

Table 2 shows the above results. In addition, the test method was performed as follows.

(I) Thermal fusion: the moving speed ratio between the transfer medium and the image receiving medium [V ₂
/ V ₁ ] = n is changed from 1 to 10, and the peeled state is observed.

(Ii) Light fastness: Observe the changes after exposing the sample after recording for 24 hours with a xenon phenodemeter.

(Iii) Storage property: Observe changes after leaving the sample after recording in a dark place at 60 ° C. for 100 hours.

From the above results, the image-receiving medium for sublimation-type thermal transfer recording of the present invention has no thermal fusion at the time of recording, has good releasability, does not generate fusion even in the n-fold mode system, and has light resistance and storage. It can be seen that an image having excellent properties can be obtained. Further, it can be seen that the sublimation type thermal transfer recording image receiving medium of the present invention in which an elastic layer is provided between the substrate and the dye receiving layer does not cause whitening even when paper is used as the substrate.

[Brief description of the drawings]

1 to 3 are schematic sectional views showing an image receiving mechanism of a sublimation type thermal transfer recording medium according to the present invention, and also include schematic sectional views of a sublimation thermal transfer recording medium. A: image receiving substrate, B: dye receiving layer, B ₁ : curing receiving layer, B ₂ ...
Surface dye receiving layer, C: elastic layer, 1: thermal head, 2
... heat-resistant layer of transfer recording medium, 3 ... transfer substrate of transfer recording medium, 4 ... dye transfer layer of transfer recording medium.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hidehiro Mochizuki 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (56) References JP-A-63-87285 (JP, A) JP-A Sho 63-212588 (JP, A) JP-A-64-5886 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41M 5/38-5/40

Claims (3)

(57) [Claims] 1. A sublimation type thermal transfer recording image receiving medium having a dye receiving layer capable of dyeing a sublimation dye on a substrate, wherein the receiving layer comprises vinyl chloride, vinyl acetate and a polymerizable unsaturated carboxylic acid as monomer units. A sublimation-type image transfer medium for thermal transfer recording, characterized in that the medium is formed from a copolymer containing the compound and an isocyanate compound. 2. The sublimation type thermal transfer recording image receiving medium according to claim 1, wherein an elastic layer is provided between the substrate and the dye receiving layer. 3. A dye-receiving layer comprising a layer formed from a copolymer containing vinyl chloride, vinyl acetate and a polymerizable unsaturated carboxylic acid as monomer units and an isocyanate compound, and a layer mainly containing a vinyl chloride resin. 3. The sublimation type thermal transfer recording image receiving medium according to claim 1, wherein the image receiving medium is laminated in that order.