JPH09300834A - Thermal transfer image receiving sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release easily half-cut areas after forming an image by half-cutting discontinuously laminate sections other than a release sheet into optional shapes for a sheet composed of a substrate to be releasable together with an adhesive mass layer formed on a release surface of the release sheet on which a dye acceptive layer is formed. SOLUTION: In a heat transfer image receiving sheet formed of a substrate to be releasable together with an adhesive mass layer formed on a release surface of the release sheet, on which a dye acceptive layer is formed and used in the sublimation transfer method utilized for a video printer and the like, half-cut lines 3 are formed discontinuously to form sections 13 and 13' forming one bridge section. A discontinuous section of the half-cut lines 3, namely the bridge sections 13 and 13', can be provided on any sites of half-cut areas, and in carrying a thermal transfer image receiving sheet in a thermal transfer printer, it is preferable to provide the bridge sections in the direction conforming to the carrying direction of the thermal transfer image sheet, as the end on the carrying direction side of the heat transfer image receiving sheet in the half-cut areas is easily peeled off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer image-receiving sheet provided with a dye receiving layer for receiving a sublimable dye transferred from a sublimation thermal transfer sheet, and more specifically, it is widely used in various color printer fields such as video printers. The present invention relates to a thermal transfer image-receiving sheet that can be used.

[0002]

2. Description of the Related Art In recent years, image forming systems represented by photographing technology and computer graphics have made remarkable progress. Along with this, the need for color hard copies of images has been increasing. Among various hard copy systems, a thermal transfer image receiving sheet is superposed on a thermal transfer sheet using a sublimable dye as a recording material, and a dye is transferred to the thermal transfer image receiving sheet by heating with a thermal head according to a recording signal to form a recorded image. The method for obtaining the image is extremely focused because the image formed is excellent in transparency, gradation reproducibility of intermediate colors and color reproducibility, and an image comparable to a silver halide photograph can be obtained.

As one application of the thermal transfer image-receiving sheet used in such a sublimation transfer system, a dye-receiving layer on which an image is formed is releasably formed on the surface of release paper (or release sheet), After forming a desired image on the layer, the dye receiving layer is peeled off and attached to an arbitrary article.
5 and 6 show an example of a prior art thermal transfer image-receiving sheet used for the above-mentioned application, and FIG. 6 shows X of FIG.
It is a -X enlarged sectional view. The thermal transfer image-receiving sheet shown in FIG. 5 is a long type having a predetermined width, both ends of which are wound on a core 1 and mounted on a printer to advance in the arrow direction or in the opposite direction to a sublimation type not shown. A thermal transfer sheet is superposed on the surface, and the thermal transfer sheet is imagewise heated from the back side by a thermal head or the like to transfer the dye of the thermal transfer sheet to the surface of the thermal transfer image receiving sheet, and an arbitrary image is formed on the surface of the thermal transfer image receiving sheet. 2 is formed.

The above-mentioned thermal transfer image-receiving sheet is half-cut into an arbitrary shape as shown in FIG. 5, and the details of its cross section are enlarged and shown in FIG. As shown in FIG. 6, the image 2 formed in the area defined by the half-cut line 3, for example, a facial photograph image, is peeled off from the release paper 5 along with the adhesive layer 4 along the half-cut line 3, The peeled image-forming dye receiving layer portion A is attached to an arbitrary article 11, for example, a notebook, a notebook, a bag, or another article, as shown in FIG. 7. Reference numeral 12 in FIG. 5 indicates a detection mark.

As described above, the conventional half-cut thermal transfer image-receiving sheet has a foamed polyethylene terephthalate (PET) film which is the support 6 of the pressure-sensitive adhesive layer 4 and the dye-receiving layer on the release surface of the release paper or release sheet 5. It is composed of a synthetic paper known under the name of YUPO and a dye-dyeable resin layer 7 (dye receiving layer) formed on the support 6. or,
The applicant of the present application has proposed a thermal transfer image-receiving sheet as described above in which a laminate of an unfoamed resin film and a foamed resin film is used as the support to improve the image color density.

[0006]

When an image is formed using the thermal transfer image receiving sheet as in the prior art, both ends of the thermal transfer image receiving sheet as shown in FIG. 5 are wound around the core 1 and the image is further formed. In the printer for use, the thermal transfer image receiving sheet is conveyed via several rollers including the platen roll, and the image forming portion is partially heated by a thermal head or the like to form a desired image. During such image formation, when the thermal transfer image-receiving sheet is curvedly conveyed by a portion such as a roll, the end portion of the area surrounded by the half-cut line 3 is turned up, the half-cut area is peeled from the end portion, and the peeled area As a result of the pressure-sensitive adhesive layer being formed on the back surface of the sheet, there is a problem in that the thermal transfer image-receiving sheet is not conveyed properly in the printer, and image formation is often interrupted.

Such a problem can be solved by improving the adhesive strength of the pressure-sensitive adhesive layer. However, when the adhesive strength of the pressure-sensitive adhesive layer is improved, when the half-cut area after image formation is peeled off, There arises a problem that it becomes difficult to peel off or a part of the peeled region is torn at the time of peeling. Therefore, an object of the present invention is to prevent the peeling of the half-cut area when the image is formed on the half-cut thermal transfer image-receiving sheet in a thermal transfer printer, and the half-cut area is easily peeled after the image formation. It is to provide an image receiving sheet.

[0008]

The above object can be achieved by the present invention described below. That is, the present invention relates to a thermal transfer image receptor comprising at least a release sheet, a pressure-sensitive adhesive layer formed on the release surface thereof, a support which can be peeled off together with the pressure-sensitive adhesive layer, and a dye receiving layer formed thereon. The thermal transfer image-receiving sheet is characterized in that the laminated portion other than the release sheet is half-cut discontinuously into an arbitrary shape in the sheet. If necessary, an intermediate layer (not shown) may be provided between the dye receiving layer and the support. In particular, in the present invention, it is preferable that the discontinuous portion that is not half-cut is formed on the side of the half-cut region in the transport direction of the thermal transfer image-receiving sheet, and at least a part of the support is the transport of the thermal transfer image-receiving sheet. The uniaxially stretched resin film stretched in the direction orthogonal to the direction, or at least a part of the support is a biaxially stretched resin film in which the stretching ratio in the direction orthogonal to the transport direction of the thermal transfer image-receiving sheet is larger than the parallel direction. preferable.

According to the present invention, in the thermal transfer image-receiving sheet as described above, the other laminated portions except the release sheet are half-cut discontinuously into an arbitrary shape, particularly in the moving direction side of the thermal transfer image-receiving sheet in the half-cut area. By leaving a part of the half-cut region uncut, it is possible to provide a thermal transfer image-receiving sheet in which the half-cut region is not peeled off due to the curling of the end of the half-cut region when forming an image in a thermal transfer printer.

[0010]

Next, the present invention will be described in more detail with reference to preferred embodiments. As shown in FIG. 1, the basic form of the thermal transfer image-receiving sheet of the present invention is characterized in that, in the thermal transfer image-receiving sheet as described above, at least one bridge portion 13 is formed by discontinuous half cut lines. It is a thermal transfer image-receiving sheet.

As shown in the enlarged views of the half-cut lines 13 in FIGS. 2a and 2b, the discontinuous portions of the half-cut lines in the thermal transfer image-receiving sheet of the present invention, that is, the bridge portions 13 and 13 ', are either half-cut areas. 2a, since the end of the half-cut area on the transport direction side of the thermal transfer image receiving sheet is easily turned over when the thermal transfer image receiving sheet is transported in the thermal transfer printer,
As shown in b, it is preferable to provide the thermal transfer image receiving sheet in a direction that coincides with the conveying direction (arrow) of the thermal transfer image receiving sheet.

After the image is formed, the half-cut area on which the image is formed is peeled off and attached to another article. When the half-cut area is peeled off, the bridges 13 and 13 'are formed.
If the width of the bridge is large, these bridge parts 13, 13 '
There is a case where the bridge does not break and a tear is generated from these bridge portions inside and outside the half cut line. Such a problem is that the support, which will be described later, is composed of a uniaxially stretched film, and the stretching direction and the two bridge portions 13, 13 'are used.
It is solved by configuring so that the directions of are the same.

FIG. 3 is an enlarged sectional view taken along line XX of FIG.
The layer structure of the thermal transfer image-receiving sheet of the present invention is, as shown in FIG. 3, a release sheet 5 and an adhesive layer 4 formed on the release surface thereof.
And a support 6 which can be peeled off together with the pressure-sensitive adhesive layer 4, and a dye receiving layer 7 formed thereon. Further, as an example of the thermal transfer image receiving sheet of another preferred embodiment of the present invention, as shown in the enlarged sectional view of FIG. 4, in the thermal transfer image receiving sheet, the support (8 + 9 + 10) is in contact with the pressure-sensitive adhesive layer 4. Unfoamed resin film 8 and dye receiving layer 7
By forming a laminate with the foamed resin film 9 in contact with, it is possible to improve the dye-coloring property of the formed image, particularly the dye-coloring property of the dark portion of the image.

Release sheet 5 used in the present invention.
Is a material obtained by subjecting the surface of a conventionally known plastic film or poly-laminated paper to a release treatment with a known release agent such as silicone. For example, Lumirror T-60 (thickness: 50 μm) manufactured by Toray, or diamond foil. W-400 (thickness 38
μm) and can be used. These release sheets preferably have a thickness of 20 μm to 100 μm. If the release sheet is too thin, the thermal transfer image-receiving sheet does not have so-called stiffness, roll feeding becomes difficult, and wrinkles occur in the thermal transfer image-receiving sheet. Or On the other hand, if the release sheet is too thick, the resulting thermal transfer image-receiving sheet will be too thick and will be difficult to apply to a thermal transfer printer.

Further, in the example of the thermal transfer image-receiving sheet of another preferred embodiment of the present invention, a surface-untreated polyolefin resin film, particularly preferably a stretched or non-stretched polypropylene resin film, is used as a release sheet. In addition to peeling prevention by the bridge part,
It is possible to prevent peeling of the half-cut area during image formation.

Surface-untreated polyolefin resin films, such as polyethylene films and polypolypropylene films, and particularly stretched or unstretched polypropylene resin films are preferable. According to the findings of the inventor,
Especially stretched or unstretched polypropylene resin film,
When a thermal transfer image-receiving sheet is formed on the surface without performing a releasing treatment as in the prior art, the release sheet and the adhesive layer are separated according to JIS P8139 by appropriately selecting the type of the adhesive. Strength is about 40-900
g, preferably in the range of about 100 to 700 g, the half-cut area is not peeled off during image formation, and the half-cut area is easily peeled off after image formation without tearing. it can. The release sheet 5 has a thickness of about 20 to 100 μm, preferably about 35 to 75 μm. Such a stretched or non-stretched polypropylene resin film can be obtained from the market as, for example, Pyrene manufactured by Toyobo, Trefan manufactured by Toray, Taiko FC manufactured by Nimura Kagaku, or the like.

The pressure-sensitive adhesive 4 used in the present invention is
Any conventionally known solvent-based or water-based pressure-sensitive adhesive may be used, and the coating amount on the release sheet is about 8 to 30 g / m ^2.
(Solid content) is generally used, and the adhesive strength is JIS
In the method of P8139, a pressure-sensitive adhesive showing a pressure-sensitive adhesive force in the range of 50 to 900 g, preferably 100 to 750 g / m ² , is preferable. When the pressure-sensitive adhesive as described above is used to form the pressure-sensitive adhesive layer 4 on the release sheet 6, it is preferable to select and use the peeling strength within the above range.

The support 6 in the thermal transfer image-receiving sheet of the present invention may be a conventionally known one, for example, Toyopearl SS P4255 (thickness: 35 μm) manufactured by Toyobo Co., Ltd., MW247 (thickness: 35) manufactured by Mobile Plastic Europe.
foamed polypropylene film, such as W-900 (50 μm) made by Diafoil, E-60 (50 made by Toray).
A foamed polyethylene terephthalate film such as μm) is preferably used.

Further, as an example of the thermal transfer image receiving sheet of another preferred embodiment of the present invention, as shown in the enlarged sectional view of FIG. 3, in the thermal transfer image receiving sheet, a support (8 + 9) is used.
+10) consists of a laminate of an unfoamed resin film 8 in contact with the pressure-sensitive adhesive layer 4 and a foamed resin film 9 in contact with the dye receiving layer 7. By doing so, it is possible to improve the formed image, particularly the color density of the high density portion, and form a high quality image.

Unfoamed resin film 8 useful in the above
Is an unfoamed film such as polyethylene terephthalate, polyethylene, or polypropylene, and any conventionally known unfoamed resin film can be used in the present invention,
The thickness is preferably in the range of about 10 to 50 μm. If the film thickness is too thin, there is no so-called stiffness, and the resulting thermal transfer image-receiving sheet has curl due to thermal contraction during image formation with a thermal head, etc., while if it is too thick, curl due to heat setting during image formation with a thermal head etc. Easier to do. As a preferred example, for example,
The Toray Lumirror S-10 (thickness 12 μm) may be used.

Further, as a useful foamed resin film 9,
A conventionally known foamed resin film such as a foamed polypropylene film or a foamed polyethylene terephthalate film can be used, and a foamed polypropylene film is particularly preferable in terms of its cushioning property. The thickness of these films is 3
About 0 to 60 μm is preferable. As a preferable example, for example, Toyopearl P4255 (thickness: 35 μ, manufactured by Toyobo Co., Ltd.)
m) and Toyopearl P4256 (thickness 60 μm) and the like.

As a method for laminating the unfoamed resin film 8 and the foamed resin film 9, known laminating methods such as dry lamination, non-solvent (hot melt) lamination and EC lamination can be used, but a preferable method. Are dry lamination and non-solvent lamination methods. Examples of the adhesive suitable for the non-solvent lamination method include Takenate A-720L manufactured by Takeda Pharmaceutical Co., Ltd., and examples of the adhesive suitable for dry lamination include Takelac A969 / Takenate A-produced by Takeda Pharmaceutical Co., Ltd. 5 (3/1) and the like. About in the solid content of the amount of these adhesives 1-8 g / ^{m 2,} preferably in the range from 2 to 6 g / ^{m 2.}

In the thermal transfer image-receiving sheet of the present invention illustrated in FIG. 3, the dye receiving layer may be formed on the support 6 in advance, or the support 6 and the release sheet 5 may be laminated. After that, it may be provided on the surface of the foamed resin film 6 which is a support. Further, in the thermal transfer image-receiving sheet of the present invention illustrated in FIG. 4, the dye receiving layer may be formed on the foamed resin film 9 before the foamed resin film 9 and the unfoamed resin film 8 are laminated. , Foamed resin film 9
May be provided on the surface of the foamed resin film 9 of the support constituted by laminating the non-foamed resin film 8 and the support (8 + 9 + 10) and the release paper or the release sheet 5 and then supported. It may be provided on the surface of the foamed resin film 9 of the body. Further, this support is a foamed resin film, for example,
A foamed polyethylene terephthalate film or a foamed polypropylene film may be used alone.

As the material for forming the dye receiving layer, for example, polyolefin resin such as polypropylene, polyvinyl chloride / vinyl acetate copolymer, ethylene.
Copolymers of vinyl acetate copolymers, halogenated polymers such as polyvinylidene chloride, polyester resins such as polyvinyl acetate and polyacrylic esters, polystyrene resins, polyamide resins, olefins such as ethylene and propyne, and other vinyl monomers. Examples of the resin include polymer resins, ionomers, cellulosic resins such as cellulose diacetate, and polycarbonates. Among them, polyester resins, vinyl chloride / vinyl acetate copolymers, and mixtures thereof are particularly preferable.

At the time of image formation, a release agent is added to the dye-receiving layer resin in order to prevent fusion of the sublimation heat transfer sheet having a dye layer with the dye-receiving layer of the heat transfer image-receiving sheet or reduction of printing sensitivity. Can be mixed. Preferred release agents used by mixing are silicone oil,
Examples thereof include phosphoric acid ester-based surfactants and fluorine-based surfactants, with silicone oil being preferred. As the silicone oil, modified silicone oil such as epoxy modified, vinyl modified, alkyl modified, amino modified, carboxyl modified, alcohol modified, fluorine modified, alkylaralkyl polyether modified, epoxy / polyether modified, polyether modified, etc. is desirable.

As the release agent, one type or two or more types are used. The amount of the release agent added is preferably 0.5 to 30 parts by weight with respect to 100 parts by weight of the dye-receiving layer forming resin. If the addition amount range is not satisfied, problems such as fusion between the sublimation heat transfer sheet and the dye receiving layer of the heat transfer image-receiving sheet or reduction in printing sensitivity may occur. By adding such a release agent to the dye receiving layer, the release agent bleeds out on the surface of the dye receiving layer after transfer to form a release layer. Further, these release agents may be separately coated on the dye receiving layer without being added to the resin for forming the dye receiving layer.

The dye-receptive layer may be prepared by dissolving the resin as described above to which the necessary additives such as a release agent are added on the surface of a foamed resin film in an appropriate organic solvent or dispersing it in an organic solvent or water. It is formed by coating and drying the dispersion thus prepared by a suitable coating method. In forming the dye receiving layer, a white pigment, a fluorescent whitening agent, or the like can be added for the purpose of improving the whiteness of the dye receiving layer and further increasing the sharpness of the transferred image. The dye receiving layer formed as described above may have any thickness, but it is generally 1 to 50 μm thick.

Further, such a dye receiving layer is preferably a continuous coating, but it may be formed as a discontinuous coating by using a resin emulsion or a water-soluble resin or a resin dispersion. Further, an antistatic agent may be coated on the dye receiving layer in order to stabilize the conveyance in the printer. Further, a suitable slip layer (not shown) can be provided on the surface of the thermal transfer image-receiving sheet opposite to the dye-receiving layer in order to prevent double feed during paper feeding in the printer. As the slip layer, butyral resin, polyacrylates, polymethacrylates, polyvinylidene chloride, polyester, polyurethane, polycarbonate, polycarbonate, polyvinyl acetate, etc. alone or blended, various fine particles and silicone etc. Those to which a lubricant has been added can be used.

In the present invention, the thermal transfer image-receiving sheet as described above is half-cut so that the thickness of the release sheet is left and the bridge portion 13 is formed at the at least one location. As the half-cut device, any conventionally known device can be used, for example, a linear cutter blade having a predetermined shape whose height can be adjusted on a horizontal pedestal,
A device having a part corresponding to the above-mentioned bulge part 13 is provided, and a device including an upper mold that can move up and down and a pedestal made of an elastic body such as rubber is used. By inserting the thermal transfer image-receiving sheet, adjusting the height of the blade, and moving the upper mold up and down, a half-cut line having a desired shape can be formed on the thermal transfer image-receiving sheet. Of course, a cylinder type rotary cutter may be used instead of the above device.

A method of forming an image on the thermal transfer image-receiving sheet of the present invention formed as described above may be a conventionally known sublimation thermal transfer system, for example, a dye layer of three colors of yellow, cyan and magenta is sequentially layered. Using the thermal transfer sheet having, a desired full-color image is formed on the dye receiving layer of the thermal transfer image receiving sheet of the present invention by a known thermal head type printer, and a layer containing an imaged dye receiving layer is formed,
It can be peeled from the release paper together with the pressure-sensitive adhesive layer, and the layer containing the peeled dye receiving layer can be attached to any article.

When the thermal transfer image-receiving sheet is half-cut as described above, an image is formed in the half-cut area, and the half-cut area image-formed by the same method as shown in FIG. 7 is formed. Peel off as well as any article 11
Can be adhered to.

[0032]

Next, the present invention will be described more specifically with reference to examples and comparative examples. It should be noted that “part” or “%” in the text is based on weight. Example 1 First, on one surface of a foamed polyethylene terephthalate film ((trade name: W-900, manufactured by DIAFOIL, thickness 50 μm), a coating liquid for a dye receiving layer having the following composition was applied at a solid content of 4.0 g / m 2. ^The dye receiving layer was formed by coating and drying at a ratio of ² .

Composition of coating liquid : Vinyl chloride / vinyl acetate copolymer (# 1000A, manufactured by Denki Kagaku Kogyo) 40 parts Polyester (Vylon 600, manufactured by Toyobo) 40 parts Vinyl chloride / styrene / acrylic copolymer (Denkalac) # 400A, manufactured by Denka Kagaku Kogyo Co., Ltd. 20 parts Vinyl-modified silicone (X-6212-12, manufactured by Shin-Etsu Chemical Co., Ltd.) 10 parts Catalyst (CAT-PLR-5, manufactured by Shin-Etsu Chemical Co., Ltd.) 5 parts Catalyst (CAT-PL-50T) , Shin-Etsu Chemical Co., Ltd.) 6 parts Methyl ethyl ketone / toluene (1/1) 400 parts

Next, on the surface of the foamed polyethylene terephthalate film on the side where the dye receiving layer is not formed,
A pressure-sensitive adhesive having the following composition was applied at a solid content coating amount of 15 g / m ² , and heat-dried at a temperature of 70 ° C. for 1 minute to form a pressure-sensitive adhesive layer. Adhesive Acrylic Copolymer (SKDyne 1310L, manufactured by Soken Chemical Co., Ltd.) 48 parts Epoxy resin (curing agent E-AX, manufactured by Soken Chemical Co., Ltd.) 0.36 part Ethyl acetate 51.64 parts

Separately, a surface-untreated biaxially oriented polypropylene film ((trade name: PYREN P2156, manufactured by Toyobo Co., Ltd.,
The pressure-sensitive adhesive layer surface of the above-described laminate was laminated on one surface of one side (thickness 50 μm) so as to face it. Finally, as an antistatic agent on the surface of the dye receiving layer, a quaternary ammonium salt compound (Matsumoto Yushi-Seiyaku Co., Ltd., TB-34 1/1000 dilution liquid)
Was applied to form a thermal transfer image-receiving sheet. The above-mentioned thermal transfer image-receiving sheet was half-cut into the shape shown in FIG. 2b, leaving the thickness of the releasable film, to obtain a thermal transfer image-receiving sheet of the present invention. The size of one screen is 110 x 110 m
m, and 12 small sections of 20 × 15 mm are formed in this one screen as shown in the figure.

Example 2 As the release sheet in Example 1, a polyethylene terephthalate film (manufactured by Toray, T-60, manufactured by Toray Co., Ltd.), the surface of which was release-treated by coating vinyl-modified silicone at a solid content of 0.3 g / m ² was applied. , 35 μm), but in Example 1
A half-cut thermal transfer image-receiving sheet of the present invention was obtained in the same manner as. Example 3 The present invention was carried out in the same manner as in Example 1 except that a synthetic paper (trade name: YUPO FPU60, manufactured by Oji Yuka, thickness: 60 μm) was used in place of the support (foamed polyethylene terephthalate) in Example 1. A half-cut thermal transfer image-receiving sheet of was obtained.

Example 4 First, a foamed polypropylene film (made by Mobil, M
A similar dye receiving layer was formed on one surface of W846 (thickness: 35 μm) in the same manner as in Example 1. Next, an adhesive having the following composition was applied to the surface of the expanded polypropylene film on which the dye receiving layer was not formed at a solid coating amount of 3 g / m ² , and the PET film (manufactured by Toray, transparent PE
(T T-60, thickness 25 μm) were attached. Adhesive Urethane resin (Takelac A-969V, manufactured by Takeda Pharmaceutical) 30 parts Isocyanate curing agent (Takenate A-5, manufactured by Takeda Pharmaceutical) 10 parts Ethyl acetate 80 parts

On the exposed surface of the PET film laminated as described above, an adhesive having the following composition was applied in a solid content of 15 g /
It was applied at a ratio of m ² and heat-dried at a temperature of 70 ° C. for 1 minute to form a pressure-sensitive adhesive layer. Adhesive Acrylic Copolymer (SKDyne 1310L, manufactured by Soken Chemical Co., Ltd.) 48 parts Epoxy resin (curing agent E-AX, manufactured by Soken Chemical Co., Ltd.) 0.36 part Ethyl acetate 51.64 parts

Separately, a surface-untreated biaxially oriented polypropylene film (trade name Pyrene P2156, manufactured by Toyobo Co., Ltd., thickness 50 μm) was laminated on one surface with the pressure-sensitive adhesive layer surface of the above-mentioned laminate facing each other. Finally, as an antistatic agent on the surface of the dye receiving layer, a quaternary ammonium salt compound (Matsumoto Yushi-Seiyaku Co., Ltd., TB-34 1/1000 dilution liquid)
Was applied to form a thermal transfer image-receiving sheet. The above thermal transfer image-receiving sheet was half-cut into the shape shown in FIG. 2a, leaving the thickness of the releasable film, to obtain a thermal transfer image-receiving sheet of the present invention. The size of one screen is 110 x 110 m
m, and 12 small sections of 20 × 15 mm are formed in this one screen as shown in the figure. Example 5 In the same manner as in Example 4 except that the polyethylene terephthalate film in Example 4 was replaced by a polyethylene film (Calarian Y, 20 μm, manufactured by Toyo Kagaku Co., Ltd.) that was uniaxially stretched in the transverse direction, was bonded to the expanded polypropylene film. A half-cut thermal transfer image-receiving sheet of the present invention was obtained. Example 6 A half-cut thermal transfer image-receiving sheet of the present invention was obtained in the same manner as in Example 5 except that the release sheet used in Example 2 was used instead of the release sheet in Example 5.

Example 7 In place of the polyethylene terephthalate film in Example 4, a polypropylene film (Toray, Trefan YT-22, 30 μm manufactured by Toray Co., Ltd.) having a high stretching ratio in the transverse direction was bonded to the expanded polypropylene film. A half-cut thermal transfer image-receiving sheet of the present invention was obtained in the same manner as in 4. Comparative Example 1 A half-cut thermal transfer image-receiving sheet of Comparative Example was obtained in the same manner as in Example 2 except that half-cutting was performed in the shape shown in FIG. Comparative Example 2 A half-cut thermal transfer image-receiving sheet of Comparative Example was obtained in the same manner as in Example 6 except that half-cutting was performed in the shape shown in FIG.

A sublimation heat transfer sheet (manufactured by Dai Nippon Printing Co., Ltd.) having dye layers of three colors of yellow, cyan and magenta in a frame order and the above-mentioned heat transfer image-receiving sheets of the present invention and the comparative example are provided with respective dye layers and dye receiving elements. Face-to-face and overlap, and apply the head applied voltage of 12.0 from the back side of the thermal transfer sheet.
V, pulse width 16 msec. Printing cycle 33.3mse
Recording was performed with a thermal head under the conditions of c and dot density of 6 dots / line, and a full-color facial photograph was formed on the dye receiving layer of the thermal transfer image receiving sheet. The reflection density of the black portion of the same portion of each obtained image was measured, and the results shown in Table 1 below were obtained. Further, when the image quality was visually evaluated, the results shown in Table 1 below were obtained.

Transportability : Judgment was made by the number of times the printer was stopped when continuous images were formed on 100 thermal transfer image-receiving sheets. Good: Printer stopped 2 times or less Poor Printer stopped 20 times or more Image quality : Visual observation ◎: Very light and shade, clear, and powerful. ◯: Excellent light and shade, clear, and powerful. X: A flat plate shape is felt as a whole. Color density : Densitometer RD- manufactured by Macbeth, USA
918, measured. Adhesive strength (peel strength) : The peel strength between the release sheet and the adhesive layer is 35 mm sample width according to JIS P8139.
It measured on condition of. Handleability : Peelability when the half-cut area is peeled off after image formation. ⊚: The bridge portion was peeled off smoothly without being caught, and the bridge portion was evenly cut. ◯: The bridge portion was somewhat caught, but peeled off smoothly, and the bridge portion was evenly cut. Δ: The bridge portion was somewhat caught, and the bridge portion was not uniform. X: Somehow caught at the bridge portion and ruptured laterally from the bridge portion.

[0043]

[Table 1] Performance evaluation

[0044]

As described above, according to the present invention, in the thermal transfer image-receiving sheet as described above, other laminated portions except the release sheet are half-cut discontinuously into an arbitrary shape, and particularly the progress of the thermal transfer image-receiving sheet in the half-cut area. By leaving a part of the direction side uncut, it is possible to provide a thermal transfer image receiving sheet in which the half cut region is not peeled off due to the curling of the end of the half cut region when forming an image in the thermal transfer printer.

[Brief description of drawings]

FIG. 1 is a diagram schematically illustrating a plane of a thermal transfer image-receiving sheet of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a diagram schematically illustrating a cross section of the thermal transfer image receiving sheet of the present invention.

FIG. 4 is a diagram schematically illustrating a cross section of a thermal transfer image receiving sheet according to another example of the present invention.

FIG. 5 is a diagram schematically illustrating a conventional half-cut thermal transfer image-receiving sheet.

6 is an enlarged sectional view taken along line XX of FIG.

FIG. 7 is a diagram illustrating a state in which a peeled image is attached to another article. 1: Core 2: Image 3: Half cut line 4: Adhesive layer 5: Release sheet 6: Support (foamed resin film) 7: Dye receiving layer 8: Unfoamed resin film 9: Foamed resin film 10: Adhesive Agent layer 11: Article 12: Detection mark

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mineo Yamauchi 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. (72) Inventor Kazunobu Imoto 1-chome, Ichigaya-Kagacho, Shinjuku-ku, Tokyo No. 1 Dai Nippon Printing Co., Ltd.

Claims (8)

[Claims] 1. A thermal transfer image-receiving sheet comprising at least a release sheet, a pressure-sensitive adhesive layer formed on the release surface thereof, a support releasable together with the pressure-sensitive adhesive layer, and a dye-receiving layer formed thereon. In the thermal transfer image-receiving sheet, the laminated portion other than the release sheet is discontinuously half-cut into an arbitrary shape. 2. The thermal transfer image-receiving sheet according to claim 1, wherein the discontinuous portion which is not half-cut is formed in the half-cut region on the conveying direction side of the thermal transfer image-receiving sheet. 3. The thermal transfer image-receiving sheet according to claim 1, wherein at least a part of the support is a uniaxially stretched resin film stretched in a direction orthogonal to the transport direction of the thermal transfer image-receiving sheet. 4. The thermal transfer image receiving sheet according to claim 1, wherein at least a part of the support is a biaxially stretched resin film having a stretching ratio in a direction orthogonal to the transport direction of the thermal transfer image receiving sheet larger than that in the parallel direction. 5. The thermal transfer image-receiving sheet according to claim 1, wherein the support comprises a laminate of an unfoamed resin film in contact with the pressure-sensitive adhesive layer and a foamed resin film in contact with the dye receiving layer. 6. The thermal transfer image-receiving sheet according to claim 1, wherein the release sheet comprises a surface-untreated polyolefin resin film. 7. The thermal transfer image-receiving sheet according to claim 6, wherein the surface-untreated polyolefin resin film is a stretched or non-stretched polypropylene resin film. 8. The peel strength according to JIS P8139 between the surface-untreated polyolefin resin film and the pressure-sensitive adhesive layer is 4
The thermal transfer image-receiving sheet according to claim 6, which has a weight of 0 to 900 g.