JPH0672054A - To-be-transferred body for thermal transfer printing - Google Patents

Abstract

PURPOSE:To prevent the irregularity of images and generation of curls and to share the material in different kinds of machines by forming a base material of four layers of a synthetic resin layer, a cellulose fiber layer, a foam polyolefin layer and an organic material layer having a larger density than the foam layer sequentially from the side in touch with a dye accepting layer. CONSTITUTION:A to-be-tranferred body 1 for thermal transfer printing consists of a base material 8 and a dye accepting layer 9. The base material 8 is in the four-layer structure consisting of a synthetic resin layer 2 of polyacrylic ester resin or the like, a cellulose fiber layer 3, a foam polyolefin layer 4 of foam polyethylene or the like, and a layer 5 of an organic material having a larger density than the foam polyolefin layer 4. The dye accepting layer 9 is provided on the synthetic resin layer 2. The density of the foam polyurethane layer 4 is 30mum-125mum per 0.5-1.0 layer. A 25-75mum thick cellulose fiber paper is used for the cellulose fiber layer 3. The thickness of the synthetic resin layer 2 is 0.1-20mum, and the organic material layer 5 is formed of cellulose fibers having 25-200mum thickness.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a transfer material for thermal transfer printing having a dye receiving layer for fixing a dye transferred from a thermal transfer ink sheet carrying one or more kinds of dyes in response to thermal stimulus. More specifically, it is a sheet-shaped transfer material for thermal transfer printing having a novel structure, which has a high contrast and a high whiteness, and which does not cause curling after transfer and has a high contrast and high quality. The image is obtained, and a transfer material for thermal transfer having a natural feel similar to paper is provided.

[0002]

2. Description of the Related Art As a method for forming an image by thermal transfer,
A thermal fusion transfer printing method and a thermal diffusion transfer printing method are known. The thermal transfer printing in the present invention refers to the latter thermal diffusion transfer printing method, from a thermal transfer ink sheet carrying one or more thermal diffusible dyes, the thermal diffusible dyes at any desired location. In this method, the dye is transferred to the dye receiving layer of the transfer material for thermal transfer printing according to the amount of stimulation. More specifically, the ink layer of a thermal transfer ink sheet having an ink layer composed of an ink in which a thermal diffusion dye is dissolved or dispersed in a binder and the dye receiving layer of a transfer material for thermal transfer having a dye receiving layer are in contact with each other. In the state, using a thermal head, light, laser, or other heating means, the heat diffusible dye at any place is transferred to the transfer target for thermal transfer in an arbitrary amount, and refers to a method for forming an image, Natural color photographic images can be obtained by printing sequentially with ink layers of various tones in the same manner.

This thermal transfer printing system is characterized in that the printer is small, maintenance and inspection are easy, and running cost is economical, and has recently been actively used as an image printing system for video, computers, electronic still cameras and the like. Various products have been developed.

As an example of a conventional transfer material for thermal transfer, there is known one in which a synthetic paper is used as a substrate and a dye receiving layer made of a saturated polyester resin or the like is provided on the surface thereof (Patent Publication, Japanese Patent Laid-Open Publication No. Sho. 59-142189). However, the above-mentioned base material is low in heat resistance such as foamed polypropylene, and heat generated by heat transfer during thermal transfer printing is transferred to the synthetic paper, causing distortion, and there is a problem that curl occurs in the transferred material for thermal transfer after printing. . In addition, synthetic paper is so-called weak, has a different texture from paper, and cannot be broken by hand, for example, a defective printed material, and other recording methods that use paper as recording paper (heat melting transfer method, electrophotography There was a case that the handling was different compared to the method).

As another example of a conventional transfer material for thermal transfer printing, there is also known a material using a paper as a core material and laminating synthetic paper such as a foamed polyolefin film on both sides thereof as a base material. (Patent gazette, JP-A-62-19
8497). However, this substrate has insufficient whiteness, requires an additional white layer, and has low surface smoothness of the foamed polyolefin film and paper, so that the surface of the transferred material for thermal transfer obtained does not have minute irregularities. There was a problem that the printed image obtained by regularity had a low gloss and a poor sense of quality.

Further, as another example of a conventional transfer material for thermal transfer printing, one using a high quality paper coated with polyethylene or the like as a base material (Patent Publication, JP-A-60-
No. 236794) and a white polyester film provided with a dye receiving layer (Japanese Patent Laid-Open No. 63-2806).
No. 86) is also known. However, these base materials have too high rigidity, and therefore have too small cushioning property, and the contact area with the thermal head becomes small at the time of printing with a printer, resulting in insufficient heat conduction and reduced thermal transfer efficiency, resulting in an image obtained. Not only the density is insufficient, but the contact pressure between the thermal transfer ink sheet and the transfer material for thermal transfer printing (pressure applied to the thermal transfer ink sheet and the transfer material for thermal transfer printing) is low, and the image may be blurred. was there. Another example of a conventional transfer material for thermal transfer printing is a combination of a white polyester film and a base sheet (synthetic paper, paper) having higher flexibility than the film, and a base film is further provided under the base sheet. A transfer material for thermal transfer printing having a laminated structure is also known (Japanese Patent Laid-Open No. 2-263689). This has improved cushioning properties and sufficient image density can be obtained, but depending on the type of printer, for example, the thermal head has a mechanism in which the contact pressure differs between the central part and the peripheral part. When transfer printing is carried out using, the image may have some faintness, especially at the edges, and the texture is a firm and unnatural feel of plastic, which is not always satisfactory. Was not.

[0007]

DISCLOSURE OF THE INVENTION The present invention solves the problems of the above-mentioned prior art, enhances cushioning properties, has a large whiteness, has sufficient gloss, and has a high-class feeling of high contrast. Providing a transfer material for thermal transfer printing, the image density after printing is large, there is no printing unevenness or blurring, especially there is no image unevenness at the center and edge of the image, curling does not easily occur, even printers with different mechanisms An object of the present invention is to provide a transfer material for thermal transfer printing that can be used in common and has a natural feel similar to paper.

[0008]

The present invention has been made in order to achieve the above-mentioned object, and in a transfer material for thermal transfer printing, wherein a dye receiving layer is provided on at least one surface of a base material, the base material is used. Of at least 4 layers, in order from the side in contact with the dye receiving layer, a layer made of synthetic resin, a layer made of cellulose fiber, a layer made of expanded polyolefin, and a layer made of an organic material having a density higher than that of the expanded polyolefin. It is a transferred material for thermal transfer printing.

Further, according to the present invention, the density of the foamed polyolefin is 0.5 to 1.0, and the thickness of the layer is 30.
a transfer body for thermal transfer printing having a size of μm to 125 μm,
The layer made of the cellulose fibers has a thickness of 25 μm to 75 μm.
The transfer material for thermal transfer printing having a thickness of 0.1 μm, the thickness of the layer made of the synthetic resin being 0.1 μm to 20 μm, and the organic material having a density higher than that of the foamed polyolefin is cellulose. A transfer material for thermal transfer printing, which is made of fibers and has a thickness of 25 μm to 200 μm.

The present invention will be described in more detail below with reference to the preferred embodiments.

FIG. 1 shows a basic structure of a transfer body for thermal transfer printing of the present invention. The transfer body 1 for thermal transfer printing is composed of a layer 2 made of synthetic resin, a layer 3 made of cellulose fiber, and a foamed polyolefin. A dye receiving layer 9 is provided on one side of a substrate 8 composed of a layer 4 composed of the above, a layer 5 composed of an organic material having a density higher than that of the expanded polyolefin, and adhesive layers 6 and 7 for adhering these layers.

The layer 2 made of synthetic resin used in the present invention is
It is a layer that is mainly composed of various synthetic resins and covers the texture unevenness of the surface of the layer 3 made of cellulose fiber,
The surface of the layer is smoothed, and it has the effects of improving the smoothness of the substrate and improving the roughness of the printed image.

The synthetic resin may be selected from various kinds of resins, but it is not limited to polyacrylic ester resin, nitrocellulose resin, polyvinyl acetate resin, polyvinyl chloride resin, vinyl chloride / vinyl acetate copolymer resin, Acrylonitrile / styrene copolymer resin, acrylonitrile /
Butadiene / styrene copolymer resin, acetate resin,
Synthetic resins such as polyurethane resin, polystyrene resin, polyethylene resin, polypropylene resin, polystyrene / butadiene copolymer resin, nylon resin and epoxy resin can be used alone or in a mixture.

Further, in order to obtain a good contrast of the transferred image, it is preferable that the transferred material for thermal transfer printing has a whiteness of 90% or more, and the layer 2 made of synthetic resin is white as the base material 8. In order to increase the degree of brightness, add inorganic particles such as barium sulfate, titanium oxide, aluminum oxide, silicon dioxide, calcium carbonate, etc., alone or as a mixture, and adjust the whiteness to 90% or more. You can

If necessary, a plasticizer, a surfactant, an antistatic agent, a fluorescent agent, etc. may be added to the layer 2 made of a synthetic resin for use. As a coating material for forming the layer 2 made of a synthetic resin, any of a solvent type, an aqueous type and a solventless type can be used.

The thickness of the layer 2 made of synthetic resin is 0.1 μm.
m to 20 μm is preferable from the viewpoint of smoothness improving effect, adhesion, coating cost, etc., and more preferably 5 μm to 20 μm.
The range is m.

As a coating method, a wire bar coating method, an air knife coating method and the like, as well as various coating methods such as gravure, offset, flexo, screen and hot melt are used.

The foamed polyolefin constituting the base material of the present invention is a sheet-shaped material in which a polyolefin contains an inorganic filler, a foaming agent and the like and fine bubbles are contained in the layer, and a foamed polyethylene film, a foamed polypropylene film or the like. Although any of the above can be used, a foamed polypropylene film is preferable in terms of flexibility and strength.
Of course, these may be stretched.

In the present invention, the layer 4 composed of the expanded polyolefin fulfills a cushioning function when the thermal transfer ink sheet and the transferred material for thermal transfer printing are pressed by the thermal head and has a density of 0.5 to 1.0. is there. A structure in which the layer of the foamed polyolefin is sandwiched by a layer 5 made of an organic material having a higher density and a higher density than the foamed polyolefin having this density, a layer 2 made of the above synthetic resin, and a layer 3 made of cellulose fibers described below. The material to be transferred for thermal transfer printing using the base material having the above can obtain a uniform image density even when printing is performed under a non-uniform contact pressure between the thermal head and the feed roller, which may cause image unevenness or In addition to having the effect of preventing blurring, it also has a beautiful gloss and is hard to curl and has good flatness.

If the density of the foamed polyolefin is too high, or if another material having a small cushioning property is used, the above non-uniform contact pressure cannot be corrected and the transferred image density becomes non-uniform. More often than not. If this density is too low, the strength will be low, and
It is difficult to produce and laminate a layer of the expanded polyolefin having a thin thickness of m or less.

The thickness of the layer 4 made of expanded polyolefin is preferably 20 μm to 200 μm, more preferably 3 from the viewpoints of flexibility, strength, required cushioning property and economical efficiency.
0 μm to 125 μm is preferable.

The layer 3 composed of cellulose fibers used in the present invention is a cellulose fiber paper having a thickness of 25 μm to 75 μm.
It is preferable for it to be within the range since the cushioning property of the expanded polyolefin is not impaired. If the thickness is too small, the strength of the cellulose fiber paper will be weak and the laminating process will be difficult. If the thickness is too large, the rigidity of the cellulose fiber paper will reduce the cushioning property as a substrate.

Cellulose fiber paper refers to paper made mainly from natural pulp or recycled pulp, and may contain a binder, a pigment, a fluorescent agent, a stabilizer and the like.
Specific examples include high-quality paper, semi-high-quality paper, medium-quality paper, recycled paper, India paper, thin paper, art paper, coated paper, cast coated paper and the like. In addition, in the case of cellulose fiber paper such as art paper, coated paper, cast coated paper, etc., which is obtained by coating a paint on the paper, the coating layer itself acts as the layer 2 made of the synthetic resin in the present invention, and is practically used. Some of them have a substantially sufficient surface smoothness, and in this case, they can be treated as an integrated layer of a cellulose fiber and a layer of a synthetic resin, and can be regarded as within the scope of the present invention. The term “smoothness of surface practically sufficient” as used herein refers to a smoothness defined by JIS-P8119 as Beck's smoothness of 300 seconds or more, and more preferably 500 seconds or more. Is larger, the more preferable. Of course, also in this case, a layer made of a synthetic resin may be newly formed by coating on the coating layer.

The layer 5 made of an organic material having a density higher than that of the expanded polyolefin of the present invention has a function of preventing curling during processing or after printing. A film containing plastic as a main component (hereinafter, simply referred to as a plastic film) constitutes this layer. Alternatively, cellulose fiber paper may be used, and a laminate of these plastic films and cellulose fiber paper may be used. When cellulose fiber paper is used, it is possible to obtain a layer 4 made of expanded polyolefin from the cellulose fiber sandwiching it. The resulting layer 3 has similar heat shrinkage characteristics and dry shrinkage characteristics, and is preferable for curling prevention. In particular,
High-quality paper, semi-high-quality paper, medium-quality paper, recycled paper, India paper,
Examples include thin paper, art paper, coated paper, cast coated paper, art post paper, fancy coated paper, and board, and those having a thickness of 25 μm to 200 μm can be used. The use of these organic materials, which have a higher density than the foamed polyolefin, imparts appropriate rigidity to the transferred material for thermal transfer printing, and by using cellulose fiber paper, it gives a natural feel to the texture, waist strength, etc. Obtainable.

Adhesive layer 6 for adhering each layer constituting the present invention
Numerals 7 and 7 are layers made of a conventionally known adhesive. Specifically, as the adhesive, polyester resin, polyacrylic ester resin, polycarbonate resin, polyvinyl acetate resin, polystyrene acrylic ester resin, vinyltoluene acrylic ester are used. Examples thereof include resins, polyurethane resins, nylon resins, urea resins, epoxy resins and the like.

These adhesives may contain extender pigments such as silica, calcium carbonate, titanium oxide and zinc oxide, if necessary.

For the adhesion of each layer, the above-mentioned adhesive is applied by a coating method such as an air knife coating method, a reverse roll coating method, a gravure coating method, a wire bar coating method, etc., and after drying, another material which constitutes the transferred material is formed. It can be performed by passing between the pressure rollers together with each layer.

The dye receiving layer 9 receives the heat diffusible dye which is transferred from the thermal transfer ink sheet according to the amount of thermal stimulus, and is a layer 2 made of at least a synthetic resin as a base material.
It is provided on one side. Materials for the dye receiving layer include polyester resin, polyacrylic ester resin, polycarbonate resin, polyvinyl acetate resin, styrene / acrylic ester copolymer resin, vinyltoluene / acrylic ester copolymer resin, polyurethane resin, nylon. Resins, urea resins, polycaprolactam resins, styrene resins, polyvinyl chloride resins, vinyl chloride / vinyl acetate copolymers, polyacrylonitrile, and other synthetic resins can be used alone or in a mixture.

In order to improve the releasability from the thermal transfer ink sheet, a solid wax, a fluorine-based or phosphoric ester-based surfactant, and a release agent such as silicone oil are contained in the dye-receiving layer, if necessary. Can be made. Further, an ultraviolet absorber, an antioxidant or the like for improving the light resistance of the transferred dye may be added to the dye receiving layer.

An intermediate layer may be provided between the dye receiving layer and the substrate, and the intermediate layer has an effect of improving the adhesion of the dye receiving layer, an antistatic effect, and a dye bleeding prevention. In addition to having a function such as a dye diffusion preventing effect, a white pigment can be contained to have an effect of improving the whiteness of the substrate.

The transfer material for thermal transfer printing of the present invention may further have a backside resin layer on the surface of the substrate opposite to the dye receiving layer. This backside resin layer has the role of preventing curling of the substrate due to dimensional changes of the cellulose fiber paper due to changes in temperature and humidity, as well as the addition of an antistatic agent to prevent the antistatic effect, and the addition of a lubricant to improve the slipping effect and the clay effect. A filler such as calcium carbonate, silica, or titanium oxide can be added to impart functions such as an effect of improving the writability. Further, as the back surface resin layer, the same or similar material as the layer made of synthetic resin may be applied. In this case, a dye receiving layer may be further formed on the back resin layer so that the dye receiving layer is provided on both sides of the substrate.

[0032]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto. In the text, “parts” or “%” are based on weight unless otherwise specified, and in the case of showing unitless numerical ratios, they are weight ratios. Further, the density indicates a bulk density calculated by weight / volume.

Evaluation of the transferred material for thermal transfer printing was carried out by the following method.

(Whiteness) The whiteness and hue of the transferred material for thermal transfer were measured using a color analyzer manufactured by Tokyo Denshoku Co., Ltd.

(Feeling of Transferred Body) The feel of paper was judged by whether or not the transferred body for thermal transfer printing could be broken by hand. Those that could be broken by hand were accepted, and those that could not be rejected were indicated.

(Transfer image density) The image signal level is 0 to 2
It is changed in 9 steps between 54 and input to a printer (Hitachi, Ltd. thermal transfer printer VY200) in which a thermal transfer ink sheet and a transfer target for thermal transfer printing are set, and the thermal head is heated according to these levels, The maximum color density of the obtained transferred image was measured with a Sakura densitometer PDA85.

With the (curl) image signal level set to 0 (black level), a thermal transfer ink sheet and a transfer target for thermal transfer printing are set and input to a printer (thermal transfer printer VY200 manufactured by Hitachi, Ltd.) for printing, and the resulting thermal transfer is obtained. The transfer material for printing was placed on a smooth table with the inner surface of the curl facing upward, and the heights of the four corners jumped up were measured to obtain an average value. It should be noted that (−) indicates curl with the dye receiving layer inside, and (+) indicates curl with the dye receiving layer outside.

(Transfer Uniformity) The uniformity of the printed transfer image was visually judged.

(Comprehensive Evaluation) Good evaluation results of the transfer material for thermal transfer printing are indicated by ◯, problematic ones by x, and intermediate border lines by Δ.

[0040]

Example 1 Foamed polyolefin film (TOYOPEARL (registered trademark) SS-P4256, manufactured by Toyobo Co., Ltd., thickness 50 μm)
m, density 0.65), a urethane adhesive (Adcoat (registered trademark) AD308 manufactured by Toyo Morton Co., Ltd., main agent: curing agent: ethyl acetate = 1: 1: 5) was applied using a bar coater, and the coating was performed at 80 ° C. for 3 times. Dried for 5 minutes (coating amount after drying: 4 g / m
² ). Cellulose fiber paper, T, manufactured by Jujo Paper Co., Ltd.
RW-7 (thickness 67 μm, density 0.98) was placed and passed through a heat roller at a temperature of 80 ° C. for adhesion. Next, a urethane adhesive was similarly applied to another surface of the foamed polyolefin film, dried, another cellulose fiber paper (TRW-7 manufactured by Jujo Paper Co., Ltd.) was placed, and similarly bonded through a heat roller. The obtained base material was left to stand for one week for aging to cure the adhesive before use.

A white ink (PSCUP63 white) manufactured by Toyo Ink Co., Ltd. as a synthetic resin was applied to one surface of this base material using a wire bar coater and dried to form a layer made of a synthetic resin (coating thickness after drying 12 μm. ). Further, the following dye-receptive layer composition was applied thereto by using a wire bar coater and dried (coating amount after drying 4 g / m ² ),
Then, it was cut into A6 size to obtain a transfer-receiving member for thermal transfer printing of the present invention.

The transferred material for thermal transfer printing thus obtained has a high whiteness of 97.0% and has appropriate rigidity and flexibility, so that it can be torn by hand like paper. Very close and favorable.

Dye-Receptive Layer Composition Polyester Resin (Byron (registered trademark) 200 manufactured by Toyobo Co., Ltd.) 10.0 parts Modified silicone (KF393 manufactured by Shin-Etsu Chemical Co., Ltd.) 0.1 part Curing agent (Modacure (registered trademark) manufactured by Monsanto Co., Ltd.) 0.5 part Ultraviolet absorber (Tinubin (registered trademark) 900 manufactured by Ciba-Geigy) 0.1 part Solvent (toluene: methyl ethyl ketone = 3: 2) 49.3 parts On the other hand, polyester film (Lumirror (registered trademark) manufactured by Toray Industries Inc., A slip layer was formed on one side having a thickness of 6 μm using silicone oil as a lubricant. Next, the following ink composition was applied to the surface opposite to the slip layer and dried to form an ink layer having a thickness of 1 μm to obtain a thermal transfer ink sheet.

Ink composition Dye (DISPERSOL RED (registered trademark) B-2B manufactured by ICI) 4.0 parts Ethyl cellulose (manufactured by Hercules) 4.4 parts Solvent (tetrahydrofuran) 100.0 parts Transfer for thermal transfer printing Thermal transfer printer (VY200 manufactured by Hitachi, Ltd.) using the body and thermal transfer ink sheet
A print test was performed using.

The results are shown in Table 1, and an image having high uniformity and no blur was obtained. Further, the curl after printing was small, and the contrast and texture were high.

[0046]

Comparative Example 1 A transfer material for thermal transfer printing for comparison was obtained in the same manner as in Example 1 except that the layer made of the synthetic resin of Example 1 was not formed. Using this, a printing test was conducted in the same manner as in Example 1.

The transferred material for thermal transfer printing thus obtained had no layer made of synthetic resin, so that the surface was not smooth and the entire surface was rough. Further, the maximum color density was as low as 1.0, and the obtained image was inferior in contrast to Example 1.

[0048]

[Comparative Example 2] The foamed polyolefin film used in Example 1 was replaced with a foamed polyester film (Diafoil W
A transfer material for thermal transfer printing for comparison was obtained in the same manner as in Example 1 except that the thickness was changed to 900E, the thickness was 50 μm, and the density was 1.13). Using this, a printing test was conducted in the same manner as in Example 1.

The transfer material for thermal transfer printing thus obtained was not preferable because it could not be torn by hand, and the obtained image had fading in the peripheral portion.

[0050]

Comparative Example 3 A transfer material for thermal transfer printing for comparison was obtained in the same manner as in Example 1 except that the layer of cellulose fiber paper on the side opposite to the dye receiving layer of the substrate was omitted. This product caused significant curl due to shrinkage of the foamed polyolefin film in the dye receiving layer drying step. Using this, a printing test was conducted in the same manner as in Example 1, but paper feeding defects frequently occurred.

[0051]

[Comparative Example 4] A white polyester film having a thickness of 1
A transfer material for thermal transfer printing for comparison was obtained in the same manner as in Example 1 except that the 25 μm Melinex 329 alone was used. Using this, a printing test was conducted in the same manner as in Example 1.

The transfer material for thermal transfer printing thus obtained could not be torn by hand, had too high rigidity and had a plastic feel, and exhibited an unnatural feel as compared with Example 1. The obtained image was inferior to that of Example 1 because the peripheral portion of the image was blurred.

[0053]

[Comparative Example 5] As a base material, high-quality coated paper (OK coat manufactured by Daio Paper Co., 80 g / m ² ) was coated with polyethylene (Mirason M-10P (registered trademark)) having a thickness of 10 μm at 180 ° C. at 180 ° C. A comparative transfer material for thermal transfer printing having no white coating layer was obtained in the same manner as in Example 1 except that the material was melt-coated. Using this, a printing test was conducted in the same manner as in Example 1.

The obtained image was inferior to that of Example 1 because the peripheral portion of the image was blurred.

[0055]

[Comparative Example 6] Fine coated paper (OK coating manufactured by Daio Paper Co.,
44 g / m ² ) on both sides of the foamed polyolefin film (Toyopearl (registered trademark) SS-P425 manufactured by Toyobo Co., Ltd.)
5, thickness 35 μm, density 0.64) were adhered. The adhesive used was Adcoat AD308 manufactured by Toyo Morton Co., Ltd., and a mixture of a main agent: a curing agent: ethyl acetate in a ratio of 1: 1: 5 was applied to the foamed polyolefin film so that the thickness after drying was 4 μm, and the fine quality was obtained after drying. It was adhered to both sides of the coated paper and used as a base material. Hereinafter, in the same manner as in Example 1,
A transfer material for thermal transfer printing for comparison was obtained. Using this, a printing test was conducted in the same manner as in Example 1.

The whiteness of the transferred material for thermal transfer printing obtained was as low as 88.1%, and the surface was irregular with minute irregularities. The obtained image also lacked gloss, It was poor in luxury.

[0057]

Example 2 As a layer made of synthetic resin, a titanium white / polyethylene (Mitsui Toatsu Chemical Co., Ltd. misoran 10-P (registered trademark) = 7/3 kneaded product was mixed so as to have a thickness of 12 μm.
A transfer member for thermal transfer printing of the present invention was obtained in the same manner as in Example 1 except that the melt coating was performed at 80 ° C. A printing test was conducted in the same manner as in Example 1.

The results are shown in Table 1. As in the case of Example 1, the material to be transferred for thermal transfer printing had a favorable paper feel, and the obtained image had a high contrast and had no blur. Was given. The curl after printing was also small.

[0059]

Example 3 As a foamed polyolefin film, Sanipearl (registered trademark) # 100 manufactured by Mitsui Toatsu Co., Ltd. (thickness 100
A transfer material for thermal transfer printing of the present invention was obtained in the same manner as in Example 1 except that the particle size was 0.6 μm and the density was 0.62). Using this, a printing test was conducted in the same manner as in Example 1.

The results are shown in Table 1. The material to be transferred for thermal transfer printing has a favorable paper feel, and the obtained image has a high contrast and has no blurring and is of practical value as in Example 1. It was a thing. The curl after printing was also small.

[0061]

Example 4 The foamed polyolefin film of Example 1 was prepared by using YUPO (registered trademark) FPG (thickness 60 μm, manufactured by Oji Yuka Co.
Except that the density was changed to 0.82), in the same manner as in Example 1,
A transfer material for thermal transfer printing of the present invention was obtained. Using this, a printing test was conducted in the same manner as in Example 1.

The results are shown in Table 1, and the transferred material for thermal transfer printing had a favorable paper feel. Further, although the obtained image may have a slight blur, it was generally preferable.

[0063]

Example 5 The procedure of Example 1 was repeated, except that the cellulose fiber paper of Example 1 was replaced with a gravure printing paper top coat G (thickness: 59 μm, density: 1.32) manufactured by Kanzaki Paper Co., Ltd.
A layer made of a foamed polyolefin was sandwiched between two sheets of this cellulose fiber paper, and a transfer material for thermal transfer printing of the present invention was obtained, which was composed of a base material having a layer made of a synthetic resin provided on one surface thereof. Using this, a printing test was conducted in the same manner as in Example 1.

The results are shown in Table 1, and the transferred material for thermal transfer printing had a favorable paper feel. Further, the obtained image has a high contrast as in Example 1,
A clear image was obtained. The curl after printing was also small.

[0065]

Example 6 The cellulosic fiber paper on the dye receiving layer side of the expanded polyolefin film of Example 1 was changed to KS Mirror Coat Wrap (registered trademark) (thickness 58 μm, density 1.10) manufactured by Kanzaki Paper Co., Ltd. The cellulosic fiber paper of was changed to OK coat (registered trademark) (thickness 64 μm, density 1.20) manufactured by Daio Paper Co., Ltd. A resin smoothing layer having a thickness of about 15 μm was provided on one surface of the KS mirror coat wrap by a cast coating method, and the Bekk smoothness thereof was 1000 seconds or more. The resin was laminated in the same manner as in Example 1 so that the resin smooth layer side was in contact with the dye receiving layer. The surface of the obtained base material on the KS mirror coat wrap side had gloss by itself, and exhibited a favorable feel. Thereafter, in the same manner as in Example 1, a transfer material for thermal transfer printing of the present invention was obtained. Using this, a printing test was conducted in the same manner as in Example 1.

The results are shown in Table 1, and the transferred material for thermal transfer printing had a favorable paper feel. Further, although the obtained image may have a slight blur, it was generally preferable.

[0067]

Example 7 The present invention was carried out in the same manner as in Example 5 except that a styrene / butadiene resin JSR latex 0617 manufactured by Japan Synthetic Rubber Co., Ltd. was applied as a layer made of a synthetic resin so as to have a dry film thickness of about 15 μm. A transfer material for thermal transfer printing was obtained. Using this, a printing test was conducted in the same manner as in Example 1.

The results are shown in Table 1. The material to be transferred for thermal transfer printing had a favorable paper feel. Further, the obtained image has a high contrast as in Example 1,
A clear image was obtained. The curl after printing was also small.

[0069]

[Example 8] A transfer material for thermal transfer printing of the present invention having a backside resin layer, which was applied on both sides when a layer made of the synthetic resin of Example 1 was applied and a dye receiving layer was formed on one side thereof. Obtained. Using this, a printing test was conducted in the same manner as in Example 1.

The results are shown in Table 1. The material to be transferred for thermal transfer printing had a desirable paper feel, and its back surface had a desirable gloss. Further, the obtained image had a high contrast and no blurring, as in the case of Example 1. The curl after printing was also small.

[0071]

Example 9 A nitrified cotton paint (Adlock (registered trademark) 083-3101 manufactured by Rock Paint Co., Ltd.) was applied after drying on the surface opposite to the surface having the dye receiving layer of the transfer material for thermal transfer printing of Example 5. An amount of 4 g / m ² was applied to obtain a transfer material for thermal transfer printing of the present invention having a back surface resin layer. Using this, a printing test was conducted in the same manner as in Example 1.

The results are shown in Table 1. The material to be transferred for thermal transfer printing had a desirable paper feel, and its back surface had a desirable gloss. Further, the obtained image had a high contrast and no blurring, as in the case of Example 1. In addition, the curl after printing is not only small, but also in the test where the transfer material for thermal transfer printing is subjected to a sudden change in humidity, curling due to expansion and contraction of the cellulose fiber paper due to the nitrification cotton paint when the humidity changes The effect of doing was seen effectively, and the curl generated was small.

Table 1 below summarizes the results of the printing tests conducted on the transfer materials for thermal transfer printing of the above Examples and Comparative Examples.

[0074]

[Table 1]

[0075]

As described above, the transfer material for thermal transfer printing of the present invention is a transfer material for thermal transfer printing in which a dye receiving layer is provided on at least one surface of a base material, and the base material has at least four layers. Consisting of a layer composed of a synthetic resin, a layer composed of cellulose fibers, in order from the side in contact with the dye receiving layer.
Since it is composed of a layer made of foamed polyolefin and a layer made of an organic material having a density higher than that of the foamed polyolefin, the material to be transferred for thermal transfer printing has a favorable feel similar to paper and can be torn by hand, and further, thermal transfer can be performed. The cushioning property of the transfer material for printing is enhanced, and it has appropriate rigidity,
High contrast, high image density, no print unevenness or blurring, especially no image unevenness at the center and edge of the image,
Curling is difficult, whiteness is large, gloss is sufficient, and it has a high-grade feeling, and has versatility that can be commonly used by printers having different mechanisms.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the basic structure of a transfer body for thermal transfer printing of the present invention.

[Explanation of symbols]

1 Transferred material for thermal transfer printing 2 Layer made of synthetic resin 3 Layer made of cellulose fiber 4 Layer made of expanded polyolefin 5 A layer made of an organic material having a density higher than that of the foamed polyolefin 6, 7 ... Adhesive layer 8 ... Base material 9 ... Dye receiving layer

Claims (5)

[Claims] 1. A transfer material for thermal transfer printing having a dye receiving layer on at least one surface of a substrate, the substrate comprising at least 4 layers, and a synthetic resin in order from the side in contact with the dye receiving layer. Layer, a layer composed of cellulose fibers,
A transfer body for thermal transfer printing, comprising a layer made of a foamed polyolefin and a layer made of an organic material having a density higher than that of the foamed polyolefin. 2. The density of the expanded polyolefin is 0.5 to
1.0 and the thickness of the layer is 30 μm to 125 μm
The transfer material for thermal transfer printing according to claim 1, wherein 3. The thickness of the layer composed of cellulose fibers is 25.
The transfer-receiving member for thermal transfer printing according to claim 1 or 2, wherein the transfer-receiving member has a thickness of μm to 75 μm. 4. The thickness of the layer made of synthetic resin is 0.1 μm.
It is -20 micrometers, Claim 1, Claim 2 characterized by the above-mentioned.
Alternatively, the transferred material for thermal transfer printing according to claim 3. 5. The organic material having a density higher than that of the expanded polyolefin is composed of a cellulose fiber, and the thickness of the layer is 25 μm to 200 μm, wherein the organic material has a thickness of 25 μm to 200 μm. 5. The transfer material for thermal transfer printing according to item 4.