JPH11268429A - Rolled thermal-transfer image receiving sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a non-printed blank space where a printing is not performed from occurring when a full printing with no blank space without printing is performed on an image receiving sheet, and prevent a turbulence of an image, an image void or the like from occurring due to the generation of folded wrinkles when the image receiving sheet meanders, and the end of the image receiving sheet comes into contact with a member of a printer while being carried in the printer. SOLUTION: For this heat-sensitive image receiving sheet 1 which is fed to a printer under a rolled state, the roll-meandering width 2 is kept within 2 mm in the rolled state appearance of the image receiving sheet 1. By this method, when a full printing with no blank space where a printing is not applied of the image receiving sheet 1, is performed, a non-printed blank space where the printing is not applied can be prevented from occurring, and when the image receiving sheet 1 is carried in the printer, a turbulence of the image, and an image void or the like can be prevented from occurring due to the generation of folded wrinkles when the image receiving sheet meanders, and the end of the image receiving sheet comes into contact with a member of the printer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-shaped thermal transfer image-receiving sheet which forms an image by superimposing a thermal transfer sheet and thermally transferring a color material, and more particularly to a printer equipped with a roll-shaped image receiving sheet. The present invention relates to a roll-shaped thermal transfer image-receiving sheet capable of forming an image well when performing full printing without any blank portion where a sheet is not printed.

[0002]

2. Description of the Related Art Heretofore, characters and images have been formed on an object to be transferred by using a thermal transfer system. As the thermal transfer method, a heat-sensitive sublimation transfer method and a heat-sensitive fusion transfer method are widely used. Of these, the thermal sublimation transfer method uses a sublimable dye as a coloring material, and uses a heating device such as a thermal head that controls the heat generation in accordance with image information to form a dye in the sublimable dye layer on the thermal transfer sheet. And a method in which an image is formed by transferring to a transfer receiving body such as a thermal transfer image receiving sheet. In the thermal sublimation transfer system, the transfer amount of the dye can be controlled in dot units by heating for an extremely short time.
The image formed in this way is very clear because the coloring material used is a dye, and is excellent in transparency, so the obtained image is excellent in halftone reproducibility and gradation,
An extremely high-definition image can be obtained. Therefore, a high-quality image comparable to a full-color silver halide photograph can be obtained.

[0003] Due to the development of various hardware and software related to multimedia, this thermal transfer method is a full color hard copy of computer graphics, a still image by satellite communication, and an analog image such as a digital image and video such as a CDROM and the like. As a system, its market is expanding. The specific application of the thermal transfer image receiving sheet by the thermal transfer method is wide-ranging. Typical examples are print proofs, image output, CAD / CAM and other design and design outputs, various medical analysis devices such as CT scans and endoscope cameras, output applications for measurement devices, and instant applications. As an alternative to photos, output of ID photos, ID cards, credit cards, and other photos on cards, as well as composite photos at amusement facilities such as amusement parks, game centers, museums, and aquariums, commemorative photos, and postcards And other applications.

Conventionally, a thermal transfer image-receiving sheet for sublimation transfer used in a heat-sensitive sublimation transfer system has a substrate in which a color material receiving layer is formed on one surface and a back surface slip layer is formed on the other surface. These image receiving sheets were cut into a certain size, and about 50 sheets were put into a cassette as one set, and used by being attached to a printer. In such a case, 2
There has been a problem that a problem caused by the transport system such as a sheet feeding failure such as a sheet insertion or a discharge failure is likely to occur. Recently, printers equipped with a roll-type image receiving sheet have been developed for the purpose of solving these problems and increasing the number of printable sheets. These printers supply an image receiving sheet in a roll form, cut it into a desired size after printing, and use it. The use of such a roll-shaped image receiving sheet solves the problem of poor conveyance, and has an advantage that although the size is determined by the size of the printer, it is relatively easy to achieve a relatively large number of printable sheets. In addition, the image of the above-described thermal sublimation transfer system is desired to have a texture like a photographic paper of silver halide photography, and recently, there is no blank portion that is not printed, and the image is formed on the front surface of the image receiving sheet. Printing is being carried out.

[0005]

When such a full printing is performed on a roll-shaped thermal transfer image-receiving sheet, there is a problem that an unprinted blank portion that is not printed is generated due to the meandering of the image-receiving sheet at the time of small winding. . Further, when the roll-shaped thermal transfer image-receiving sheet is conveyed in the printer, it is meandered, the end of the image-receiving sheet comes into contact with a member of the printer, and a folding wrinkle is generated. There is a problem.

Accordingly, an object of the present invention is to provide a printer equipped with such a roll-shaped thermal transfer image-receiving sheet, when performing full printing without any unprinted margins on the image-receiving sheet, unprinted unprinted margins are eliminated. When it is generated or conveyed in the printer, it is meandering, the end of the image receiving sheet comes into contact with the member of the printer, and folding wrinkles occur,
An object of the present invention is to provide a roll-shaped thermal transfer image-receiving sheet capable of preventing the occurrence of image dripping, image dropping, and the like.

[0007]

In order to achieve the above object, the present invention relates to a thermal transfer image receiving sheet supplied to a printer in a roll state, wherein the image receiving sheet has a roll-like appearance and a winding meandering width of 2 mm or less. There is a feature.
The coefficient of kinetic friction between the receiving layer surface and the back surface of the thermal transfer image-receiving sheet is preferably 0.20 to 0.80.

[0008]

The roll-shaped thermal transfer image-receiving sheet of the present invention is supplied to a printer in a roll state. By setting the winding meandering width within 2 mm in the roll-shaped appearance of the image-receiving sheet, the non-printing margin of the image-receiving sheet is formed. When performing full printing without any printouts, unprinted margins that are not printed may occur, or when transported in the printer, meandering, the edge of the image receiving sheet may come into contact with the members of the printer, and the paper may be folded. Is generated, and it is possible to prevent the image from dropping and the image dropping.

Further, the roll-shaped thermal transfer image-receiving sheet of the present invention has a dynamic friction coefficient between the receiving layer surface and the back surface of the image-receiving sheet.
By keeping it within the range of 0.20 to 0.80, the frictional property of the image receiving sheet is kept moderate, and the heat transfer image receiving sheet may be meandering when wound in a small roll, or may be rolled up until used in a printer after the small roll. It is possible to prevent the winding meandering from increasing during transportation or handling of the thermal transfer image receiving sheet, and to make it easier to fit the winding meandering width within 2 mm in the roll-like appearance of the image receiving sheet.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. When the roll-shaped thermal transfer image-receiving sheet of the present invention is used, in a printer, when performing full printing without a blank portion that is not printed on the image-receiving sheet, an unprinted blank portion that is not printed occurs or is conveyed in the printer. Occasionally, the end of the image receiving sheet comes into contact with a member of the printer due to meandering, so that a wrinkle is generated, and it is possible to prevent the image from dropping, the image dropping, and the like.

FIG. 1 shows an example of the roll-shaped thermal transfer image-receiving sheet of the present invention. FIG. 3 is a plan view of the roll-shaped thermal transfer image-receiving sheet, showing a roll-shaped appearance of the roll-shaped thermal transfer image-receiving sheet 1 wound up on a bobbin 3 and having a meandering width of 2; Also, FIG.
1 shows an example of a layer configuration of a roll-shaped thermal transfer image-receiving sheet of the present invention. That is, as the base material 4, the fine gap layer 8 is formed on the support 7 via the adhesive layer 9, and the receiving layer 5 is formed on the fine gap layer 8 side of the base material 4 via the intermediate layer 10. Provided. Further, a curl prevention layer 6 is formed on the other surface of the base material 4.

(Wound meandering width) The thermal transfer image receiving sheet of the present invention is supplied to a printer in a roll state, and the winding meandering width of the image receiving sheet is within 2 mm. In the roll-shaped appearance, the winding meandering width 2 is not the winding meandering width at the outer periphery of the adjacent image receiving sheets, but is a unit of one winding and shifted to the rightmost end and to the leftmost end as shown in FIG. Means the width of deviation from the part that was set. In order to keep such winding meandering width within 2 mm, the coefficient of kinetic friction between the receiving layer surface and the back surface of the roll-shaped thermal transfer image-receiving sheet is preferably in the range of 0.20 to 0.80,
As a result, the frictional properties of the image receiving sheet are kept moderate, and the winding and meandering of the thermal transfer image receiving sheet during small winding and the transport and handling of the thermal transfer image receiving sheet until use in the printer after the small winding increase the winding and meandering Can be prevented.

Further, in order for the coefficient of kinetic friction between the receiving layer surface and the back surface of the roll-shaped thermal transfer image-receiving sheet to be in the range of 0.20 to 0.80, the layer structure of the thermal transfer image-receiving sheet, the material of each layer and the laminating conditions, etc. The dynamic friction coefficient changes depending on
It can be adjusted by changing the content and type of additives such as a release agent, a surfactant and a filler in the receiving layer and / or the back layer. In the present invention, the coefficient of kinetic friction between the receiving layer surface and the back surface of the thermal transfer image-receiving sheet is in the range of 0.20 to 0.80. And a load of 35 g / cm ²
Is the dynamic friction coefficient at a tensile speed of 500 mm / min.
As shown in FIG. 2, the layer structure of the roll-shaped thermal transfer image-receiving sheet has a multilayer structure such as a receiving layer 5 / intermediate layer 10 / microporous layer 8 / adhesive layer 9 / support 7 / curling prevention layer, and a dynamic friction coefficient. Is preferably performed from the viewpoint of improving the performance of the thermal transfer image-receiving sheet, such as image quality and curl prevention.

In order to keep the meandering width of the roll-shaped thermal transfer image-receiving sheet within 2 mm, the heat-transfer image-receiving sheet is wound around a bobbin, which is a final manufacturing step, that is, in a small winding step, an edge guide controller or the like is used. It goes without saying that winding is performed with less meandering. In the present invention, the mechanical conditions of the manufacturing process such as the small winding process as a requirement of the patent, not to reduce the winding meandering, but by the material conditions of the image receiving sheet such as the layer configuration of the thermal transfer image receiving sheet, It controls the dynamic friction coefficient to reduce winding meandering.

(Receiving Layer) The receiving layer 5 of the thermal transfer image-receiving sheet of the present invention is obtained by adding various additives such as a releasing agent to a varnish mainly composed of a resin which can easily dye a coloring material. Constitute. Typical resins that can be easily dyed include polyolefins such as polypropylene, halogenated resins such as polyvinyl chloride and polyvinylidene chloride, vinyl resins such as polyvinyl acetate and polyacrylate, and copolymers thereof. Coalesce, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polystyrene resins, polyamide resins, copolymers of olefins such as ethylene and propylene with other vinyl monomers, polyurethane, polycarbonate, acrylic resin, ionomer, cellulose A single substance such as a derivative or a mixture thereof can be used. Among them, a polyester resin and a vinyl resin are preferable.

The receiving layer may contain various release agents in order to prevent thermal fusion with the thermal transfer image receiving sheet during image formation. As the release agent, a phosphate ester-based plasticizer, a fluorine-based compound, or silicone oil can be used, and among them, silicone oil is preferred. Various modified silicones such as dimethyl silicone can be used as the silicone oil. Specifically, amino-modified silicone, epoxy-modified silicone, alcohol-modified silicone, vinyl-modified silicone, urethane-modified silicone, or the like may be used, and these may be blended or polymerized by various reactions. One or more release agents are used. The amount of the release agent to be added is preferably 0.5 to 30 parts by weight based on 100 parts by weight of the resin for forming the receiving layer. If the addition amount range is not satisfied, problems such as fusion between the sublimation type thermal transfer sheet and the receptor layer of the thermal transfer image receiving sheet or reduction in printing sensitivity may occur. By adding such a release agent to the receptor layer, the release agent bleeds out on the surface of the receptor layer after the transfer to form a release layer. Further, these release agents may be separately coated on the receiving layer without being added to the receiving layer. The release layer made of the release agent is one of the determinants of the dynamic friction coefficient of the thermal transfer image-receiving sheet, and the thickness of the release layer is preferably 0.05 to 2.0 μm.

In the formation of the receiving layer, a white pigment, a fluorescent whitening agent and the like can be added for the purpose of improving the whiteness of the receiving layer to further enhance the sharpness of the transferred image.
The coating of the receiving layer is performed by a general method such as a roll coating method, a bar coating method, a gravure coating method, a gravure reverse coating method, and an extrusion coating method. The coating amount is preferably about 0.5 to 15 g / m ^{2 in} solid content. Further, such a receiving layer is preferably a continuous coating, but may be formed as a discontinuous coating using a resin emulsion or a water-soluble resin or a resin dispersion. Further, an antistatic agent may be coated on the receiving layer in order to stabilize the transfer of the thermal transfer printer.

An antistatic layer may be provided on the receiving layer surface or the back surface of the image receiving sheet, or on the outermost surface of both surfaces. Antistatic layer is an antistatic agent, fatty acid ester, sulfate ester, phosphate ester, amides, quaternary ammonium salts,
It can be formed by coating and dissolving or dispersing betaines, amino acids, acrylic resins, ethylene oxide adducts and the like in a solvent. The forming means may be the same as the above-described receiving layer. The coating amount of the antistatic layer is preferably from 0.001 to 0.1 g / m ² when dried.

(Intermediate Layer) An intermediate layer 10 can be provided between the receiving layer and the base material, if necessary. As the middle layer,
Any material may be used for that purpose. For example,
High whiteness can be obtained by using a resin obtained by adding various white pigments to a resin. Further, a fluorescent whitening agent, an antistatic agent and the like can be added as required.
Further, an intermediate layer may be provided as necessary for the purpose of improving the adhesiveness between the base material described later and the above-mentioned receiving layer.
Further, in order to improve the adhesiveness, a pretreatment for providing an intermediate layer such as a corona discharge treatment or an ozone treatment may be performed in advance on the surface of the substrate on which the receiving layer is to be formed.

As the intermediate layer, a layer obtained by curing a thermoplastic resin, a thermosetting resin, or a thermoplastic resin having a functional group by using various curing agents or other methods can be used. Specifically, polyvinyl alcohol, polyvinylpyrrolidone, polyester, chlorinated polypropylene,
Modified polyolefins, urethane resins, acrylic resins, polycarbonates, ionomers, resins obtained by curing monofunctional and / or polyfunctional hydroxyl-containing prepolymers with isocyanate or the like can be used. To these resins, titanium oxide, calcium carbonate, barium sulfate and other known inorganic pigments and organic fillers, additives such as fluorescent brighteners, etc., in order to impart functions such as whiteness and concealing properties as necessary. Can be added. The coating thickness is 0.
It is preferably about 5 to 30 μm.

(Substrate) Substrate 4 used for thermal transfer image-receiving sheet
As the various types of paper, synthetic paper, plastic sheets, and the like, the above-described receiving layer may be formed directly or via a primer layer, but has higher printing sensitivity and has no density unevenness or white spots. In order to obtain high image quality, the existence of the layer 8 having fine voids is indispensable. As the layer having fine voids, a plastic sheet or synthetic paper having fine voids inside can be used. Further, a layer having fine voids can be formed on various supports 7 by various coating methods. As a plastic sheet or synthetic paper having fine voids, a polyolefin, particularly polypropylene, is mainly used, and a polymer incompatible with an inorganic facial and / or polypropylene is blended, and these are used as a void formation initiator, and a mixture thereof is used. Is preferably a plastic sheet or a synthetic paper formed by stretching. When these are mainly composed of polyester, etc., because of their viscoelastic or thermal properties, cushioning properties and heat insulation properties are inferior to those mainly composed of polypropylene, so that printing sensitivity is poor, and Density unevenness is also likely to occur.

Taking these points into consideration, the elastic modulus at 20 ° C. of the plastic sheet and synthetic paper is 5 × 10 ⁸ P
a to 1 × 10 ¹⁰ Pa is preferable. These plastic sheets and synthetic papers are usually formed by biaxial stretching. Therefore, they shrink by heating.
The shrinkage when these are left at 110 ° C. for 60 seconds is
0.5% to 2.5%. The above-mentioned plastic sheet or synthetic paper may itself be a single layer including layers having fine voids, or may have a multilayer structure. In the case of a multi-layer configuration, all of the constituent layers may contain fine voids, or a layer having no fine voids may exist. And on this plastic sheet or synthetic paper,
If necessary, a white pigment may be mixed as a hiding agent. In order to increase whiteness, an additive such as a fluorescent whitening agent may be provided. A layer having fine voids has a thickness of 30 to 80 μm.
m is preferred.

As the layer having fine voids, it is also possible to form a layer having fine voids on a support by a coating method. As plastic resin to be used, polyester, urethane resin, polycarbonate,
Known resins such as acrylic resin, polyvinyl chloride, polyvinyl acetate and the like can be used alone or in combination of two or more. The support 7 may be a conventionally known one. Various types of paper such as high-quality paper, coated paper, art paper, cast-coated paper, glassine paper, synthetic paper, non-woven fabric, and plastic sheets such as polyethylene terephthalate, acrylic, polyethylene, and polypropylene, etc. Can be used.

The substrate 4 may be made of various papers, synthetic papers, plastic sheets or the like, but it is preferable to provide the support 7 with the fine void layer 8 as described above. At that time,
When the fine void layer 8 is a plastic sheet or synthetic paper,
It can be bonded to the support 7 by the adhesive layer 9. As a bonding method, for example, a known lamination method such as dry lamination, non-solvent (hot melt) lamination, and EC lamination method can be used, and preferred methods are dry lamination and non-solvent lamination. Suitable adhesives for the non-solvent lamination method include, for example, Takenate A-720L manufactured by Takeda Pharmaceutical Co., Ltd.
Suitable adhesives for dry lamination include, for example, Takelac A manufactured by Takeda Pharmaceutical Co., Ltd.
969 / Takenate A-5 (3/1).
The amount of these adhesives used is about 1 to 8 g in solid content.
/ M ² , preferably in the range of ^{2 to} 6 g / m ² .

(Curl Prevention Layer) It is preferable to provide a curl prevention layer 6 on the other surface of the substrate of the thermal transfer image receiving sheet. As the name implies, the anti-curl layer 6 can prevent the thermal transfer image-receiving sheet from curling, and can also provide an appropriate sliding property for improving the transportability of the thermal transfer printer. The curl prevention layer 6 is mainly composed of a resin such as polyvinyl alcohol, polyvinylidene chloride, polyethylene, polypropylene, modified polyolefin, polyethylene terephthalate, and polycarbonate, and can contain various fillers for imparting slipperiness. And
The anti-curl layer 6 is formed by forming a synthetic resin layer in a film shape in advance, laminating the synthetic resin film on a support 7, or by applying a prepared coating liquid. It can be formed by any of the methods or extrusion lamination methods. When the anti-curl layer is formed by the extrusion laminating method, a multi-layer anti-curl layer can be formed by co-extrusion lamination to have multiple functions. The thickness of the anti-curl layer is 1 to 50 μm
The degree is preferred. Further, on the anti-curl layer, various kinds of fillers can be dispersed in the above-mentioned resin to form a back surface slip layer, and the surface of the layer can be made uneven.

(Bobbin) The roll-shaped thermal transfer image-receiving sheet of the present invention is wound around a bobbin as a core. The bobbin 3 used may be a paper tube made of pulp. A plastic molded product having almost no dimensional change with respect to humidity is preferred. Examples of the material of the plastic molded product include polymers such as polystyrene, polyacetal, ABS, vinyl chloride, polycarbonate, and polyester. Further, since the thermal transfer image receiving sheet is wound around the outer periphery of the bobbin, it is preferable that the accuracy of the bobbin outer diameter is particularly high, and the dimensional tolerance is 0.5.
% Is desirable. If the dimensional accuracy is high, the thermal transfer image-receiving sheet is rolled without eccentricity, has a small winding meandering width, and is wound.

The thermal transfer image-receiving sheet of the present invention has a constitution of receiving layer / substrate / adhesive layer / release sheet, which is called a label or seal type, and the release sheet can be peeled off from the adhesive layer. However, the present invention can also be applied to those in which a receiving layer / substrate / adhesive layer is attached as a seal to any article. The pressure-sensitive adhesive layer can be formed using any of conventionally known solvent-based and water-based pressure-sensitive adhesives. Examples of the adhesive include vinyl acetate resin, acrylic resin, vinyl acetate-acryl copolymer, vinyl acetate-vinyl chloride copolymer, ethylene-vinyl acetate copolymer, polyurethane resin, natural rubber, chloroprene rubber, and nitrile rubber. And the like. The coating amount of the adhesive layer is about 8 to 30 g / m
² (solid content) is common, and is applied on a release sheet by a conventionally known method, that is, a method such as gravure coating, gravure reverse coating, or roll coating, and dried to form an adhesive layer. The release sheet is a material obtained by subjecting a surface of a conventionally known plastic film or poly-laminate paper to a release treatment with a known release agent such as silicone. The release sheet having a thickness of 20 to 100 μm is preferably used.

[0028]

The present invention will be described more specifically with reference to the following examples and comparative examples. It should be noted that “part” or “%” in the text is based on weight. (Example 1) An intermediate layer and a receptor layer having the following composition were sequentially applied to a 39 μm-thick microvoid film of a microvoid layer, dried, and then an adhesive having the following composition was applied to the surface opposite to the surface on which the receptor layer was formed. Coated and dried. However, the coating amount of each layer at the time of drying, the intermediate layer 2.0 g / m ^2, the receiving layer 4.2 g / m ^2, an adhesive layer 4.0 g / m ^2. Next, a coated paper having a basis weight of 186.1 g / m ² was used as a support, and a polyethylene resin layer and a polypropylene resin layer were formed on one surface of the coated paper by a co-extrusion method as a curl prevention layer by a lamination method. However, the thickness of the polyethylene resin layer is 14μ.
m, the thickness of the polypropylene resin layer was 19 μm, and the polyethylene resin layer was in contact with the support. The above adhesive layer and the surface of the support on which the anti-curl layer was not formed were adhered to prepare a thermal transfer image-receiving sheet. Then, an antistatic layer having the following composition was applied on the surface of the anti-curl layer and dried to form a layer. Further, a thermal transfer image-receiving sheet having a width of 110 mm and a length of 24 m was wound around a polystyrene bobbin having an outer diameter of 30 mm and a width of 140 mm.

Intermediate layer coating liquid polyester resin (WR-905, manufactured by Nippon Polyurethane Co., Ltd.) 13.1 parts Titanium oxide (TCA888, manufactured by Tochem Products Co., Ltd.) 26.2 parts Fluorescent brightener (Ubitex) BAC, Nippon Ciba-Gaikey Co., Ltd.) 0.39 parts Water 60.0 parts Water / IPA = 1 / l 32.0 parts

Receptive layer coating liquid Vinyl chloride-vinyl acetate copolymer 12.0 parts (Denka vinyl # 1000A, manufactured by Denki Kagaku Kogyo KK) Epoxy-modified silicone 0.8 parts (X-22-3000T, Shin-Etsu Chemical Co., Ltd.) Amino-modified silicone 0.24 part (X-22-1660B-3, manufactured by Shin-Etsu Chemical Co., Ltd.) Toluene / MEK = 1/1 60.0 parts

Adhesive layer coating solution polyfunctional polyol 30 parts (Takelac A-969V, manufactured by Takeda Pharmaceutical Co., Ltd.) Isocyanate 10 parts (Takenate A-5, manufactured by Takeda Pharmaceutical Co., Ltd.) 60 parts of ethyl acetate

Polyethylene resin layer High-density polyethylene resin (J-LEX LZ0139-5, manufactured by Nippon Polyolefin Co., Ltd.) Polypropylene resin layer Polypropylene resin (J-Alomer LR711-5, manufactured by Nippon Polyolefin Co., Ltd.)

Antistatic layer coating liquid Antistatic agent (TB34, manufactured by Matsumoto Yushi Co., Ltd.) 1 part IPA 1000 parts

(Example 2) In the roll-shaped thermal transfer image-receiving sheet prepared in Example 1, a writing layer having the following composition was formed on the surface of the anti-curl layer so that the coating amount was 1.75 g / m ² when dried. A roll-shaped thermal transfer image-receiving sheet was produced in the same manner as in Example 1 except for the above.

Coating solution for writing layer 30 parts polyvinyl butyral (# 3000-1, manufactured by Denki Kagaku Kogyo KK) Nylon filler (MW-330, manufactured by Shinto Paint Co., Ltd.) 5 parts Silica (Sylysia 250, Fuji Silysia) Chemical Co., Ltd.) 60 parts Chelating agent (Orgatex TC-750, manufactured by Matsumoto Pharmaceutical Co., Ltd.) 5 parts Toluene / MEK = 1/1 400 parts

Comparative Example 1 Synthetic paper YUPO “HDU-60” was adhered to both sides of 72.3 g / m ² natural paper with the adhesive used in Example 1, and Example 1 was applied to one surface. The intermediate layer and the receiving layer were formed using the coating liquid for the intermediate layer and the receiving layer used in the above. On the other side, the coating amounts of the intermediate layer and the writing layer having the following composition at the time of drying were 0.5 g / m ² and 2.5 g /
m ² to produce a thermal transfer image-receiving sheet,
Wound on a bobbin similar to the bobbin used in Example 1,
A roll-shaped thermal transfer image-receiving sheet of Comparative Example 1 was produced.

[0037]Intermediate layer coating liquid Urethane resin (N-5199, manufactured by Nippon Polyurethane Co., Ltd.) 20 parts IPA / MEK / toluene = 1/2/2 40 parts Writing layer coating liquid Cellulose resin (L-30, manufactured by Daicel Chemical Industries, Ltd.) 30 parts Nylon filler (MW-330, manufactured by Shinto Paint Co., Ltd.) 10 parts Silica (Sylysia 250, manufactured by Fuji Silysia Chemical Ltd.) 40 parts MEK / Methanol = 1/1 400 parts

In the rolled thermal transfer image receiving sheets of the above Examples and Comparative Examples, the dynamic friction coefficient was measured under the following conditions.
The winding meandering width was measured. Further, image formation was performed under the following conditions, and the image quality was examined. Dynamic friction coefficient The receiving layer side and the curl prevention layer side of each thermal transfer image-receiving sheet were overlapped, and the dynamic friction coefficient was measured at a load of 35 g / cm ² and a tensile speed of 500 mm / min.

Winding meandering width Each roll-shaped thermal transfer image receiving sheet is wound up by a length of 24 m on the same type of bobbin by the same small winding machine. Each roll-shaped thermal transfer image-receiving sheet was wrapped in an air cushion, placed in a cardboard box, transported from Tokyo to Osaka by truck, and after arriving in Osaka, the package was unwrapped and the winding meandering width was measured.

Image Quality An image is formed by using a thermal transfer test printer by using a thermal transfer sheet having dye layers of three colors of yellow, magenta and cyan in a plane-sequential manner and each of the above-mentioned roll-form thermal transfer image receiving sheets. When an unprinted blank area occurs, which is not printed on the printed image,
The end of the image receiving sheet came into contact with a member of the printer while meandering, and a wrinkle was generated. However, the above-mentioned printer is a printer that performs full printing without any blank portions on the image receiving sheet.

The evaluation is based on the following criteria. ：: Unprinted unprinted margins are not recognized, and only the image due to wrinkles is missing, and no missing image is recognized. ×: Unprinted blanks are not printed, or only images due to wrinkles are detected. Image drop is observed.

The measurement and evaluation results are shown in Table 1 below.

[Table 1]

[0043]

As described above, the roll-shaped thermal transfer image-receiving sheet of the present invention is supplied to a printer in a roll state, and the roll-shaped appearance of the image-receiving sheet has a winding meandering width of 2 m.
m or less, when performing full printing without any non-printed margins on the image receiving sheet, unprinted unprinted margins occur, or meander when conveyed in the printer, Can be prevented from coming into contact with a member of the printer, causing a wrinkle, and causing only an image to be blurred, an image dropping, and the like. The coefficient of kinetic friction between the receiving layer surface and the back surface of the image receiving sheet is 0.20 to 0.20.
By keeping it within the range of 0.80, the frictional property of the image receiving sheet is appropriately maintained, the winding of the thermal transfer image receiving sheet may be meandered at the time of small winding, and the roll-shaped thermal transfer image receiving sheet may be used until it is used in a printer after the small winding. It is possible to prevent the winding meandering from increasing during transportation and handling, and to make it easier to fit the winding meandering width within 2 mm with the roll-shaped appearance of the image receiving sheet.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a roll-shaped thermal transfer image-receiving sheet of the present invention.

FIG. 2 is a cross-sectional view illustrating an example of a layer configuration of a roll-shaped thermal transfer image-receiving sheet of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 roll-shaped thermal transfer image-receiving sheet 2 winding meandering width 3 bobbin 4 base material 5 receiving layer 6 anti-curl layer 7 support 8 microvoid layer 9 adhesive layer 10 intermediate layer

Claims (2)

[Claims] 1. A thermal transfer image receiving sheet supplied to a printer in a roll state, wherein a winding meandering width of the image receiving sheet in the form of a roll is within 2 mm. 2. The roll-shaped thermal transfer image receiving sheet according to claim 1, wherein the coefficient of kinetic friction between the receiving layer surface and the back surface of the thermal transfer image receiving sheet is 0.20 to 0.80.