JPH10157316A - Thermal transfer dye receiving sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal transfer dye receiving sheet in which an image transfer part can be released easily and pasted onto various articles without causing any defective traveling at the time of printing. SOLUTION: A separator part 4 obtained by applying a releasing agent layer 3 to a releasing sheet basic material 2 is bonded to a receiving sheet part 7 obtained by applying an image receiving layer 6 to a receiving sheet basic material 5 such that the releasing agent layer 3 is bonded to the receiving sheet basic material 5 through an adhesive layer 8. The adhesive layer 8 and/or the receiving sheet part 7 is then subjected to discontinuous half-cut processing having one or more bridge part 12 of 1.5mm or shorter thus forming a cutting part region of desired shape and dimensions. Furthermore, formation of burr can be prevented by subjecting the bridge part 12 to quarter cutting 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal dye transfer receiving sheet. More specifically, in the present invention, the image receiving sheet portion having a partial region half-cut into a desired shape is peelably adhered to the separator portion, and after image transfer, the partial region of the image receiving sheet is separated from the separator portion. It can be peeled off and attached to various objects, but before image transfer, and at the time of image transfer, the partial area is stably held on the separator part, and in the printer, the dye heat transfer receiving sheet which does not cause running failure It is about.

[0002]

2. Description of the Related Art In recent years, a thermal printing system, particularly a dye thermal transfer printing system capable of printing a clear full-color image, has attracted attention. The dye thermal transfer printing method is a method in which a receiving layer containing a dye-dyeable resin of a dye thermal transfer receiving sheet is superimposed on a dye layer of a dye ink sheet, and heat supplied from a thermal head or the like corresponding to a desired image is used.
The image is formed by transferring a predetermined amount of the dye at a required portion of the dye layer onto the receiving layer. As the dye ink sheet, three colors including yellow, magenta, and cyan, or three colors including four dyes including black added thereto, or four colors are included.
A full-color image is obtained by sequentially transferring the dyes of the dye ink sheets of each color to the dye thermal transfer receiving sheet. Also, an adhesive label type dye thermal transfer receiving sheet having an adhesive layer or the like formed on the back surface of the sheet so that the sheet after transfer recording thus obtained can be freely attached to various articles is also known. ing.

A label-type dye thermal transfer receiving sheet is
A release sheet substrate and a release agent layer (separator portion);
It is obtained by laminating the pressure-sensitive adhesive layer, the receiving sheet base material and the receiving layer (receiving sheet portion) in the order described above, and the separator portion, the pressure-sensitive adhesive layer and the receiving sheet portion are peelable, The receiving sheet portion can be attached to various articles by the post-adhesive layer. The quality required for this label type dye thermal transfer receiving sheet is that the image density is high, there is no curl due to heat at the time of transfer, the transfer recording can be performed smoothly, and the image is formed after the transfer image recording. For example, the receiving sheet portion and the separator portion can be easily and accurately separated from each other.

[0004] As a label type dye thermal transfer receiving sheet, it is known that a receiving sheet portion or a separator portion is subjected to a half-cut treatment so that a transferred image recording portion area is easily peeled (Japanese Patent Application Laid-Open No. Sho 64-82988). No.). However, with the dye thermal transfer receiving sheet having such a configuration, with the speeding up of the printer and the miniaturization of the printer, the half-cut partial area of the receiving sheet part is peeled off during printing, and it is attached to an ink ribbon or the like. This causes a new problem of causing running failure.

[0005]

SUMMARY OF THE INVENTION The present invention comprises a separator section and an image receiving sheet section which are releasably adhered by an adhesive layer, and a partial area formed on the image receiving sheet section by half-cut processing is transferred. An object of the present invention is to provide a dye transfer receiving sheet which does not peel off before or during the transfer process, but can be easily peeled off after the image thermal transfer process.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems of the prior art, and as a result, when half-cutting a dye thermal transfer receiving sheet, a bridge portion having a specific width is used. By providing a discontinuous half-cut with the provision of a very small cut, the present invention has been completed. The dye thermal transfer receiving sheet according to the present invention has a separator portion having a release sheet substrate, a release agent layer formed on one surface thereof, a receiving sheet substrate, and a dye image receiving device formed on one surface thereof. And a pressure-sensitive adhesive layer formed on the opposite surface of the image receiving sheet substrate, a release agent layer of the separator portion, and a receiving sheet substrate of the image receiving sheet portion And is adhered releasably via the pressure-sensitive adhesive layer, the image receiving sheet portion, or the image receiving sheet portion and the pressure-sensitive adhesive layer,
A discontinuous half-cut process that leaves one or more bridge portions having a length of 1.5 mm or less is performed, thereby forming one or more partial regions. Further, in the dye thermal transfer receiving sheet of the present invention, it is preferable that one to three bridge portions having a length of 1.5 mm or less are provided per 10 mm of the discontinuous half cut length. Further, in the dye thermal transfer receiving sheet of the present invention, it is preferable that a quarter cut is provided at substantially the center of each of the bridge portions.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the label-type dye thermal transfer receiving sheet of the present invention, when the image receiving sheet portion or the image receiving sheet portion and the pressure-sensitive adhesive layer are half-cut, the length is 1.5 mm or less. By leaving one or more bridge portions, the running property of the dye thermal transfer receiving sheet in the printer is not hindered. If the length of the bridge portion is more than 1.5 mm, inconveniences such as that the receiving sheet portion is less likely to be peeled from the separator portion or that the receiving sheet portion is easily broken. As the specific dimensions of the bridge part, when the receiving sheet is squeezed by a roll such as a guide roll inside the printer, and runs with the ink ribbon under a pressure of about 2 to 20 kg / 10 to 300 mm, it is cut by half cutting. It is necessary that there is no peeling of the cut partial region, and that the operation of peeling the cut partial region of the receiving sheet portion from the separator portion after printing is easy, and for this, the half cut length, per 10 mm,
Preferably, one to three bridge portions having a length of 1.5 mm or less are provided, and the bridge length is more preferably 0.5 mm or less. As a means for forming the bridge portion, a concave portion (non-blade portion) corresponding to the bridge portion may be formed in the half-cut blade body. In the label-type dye thermal transfer receiving sheet, when the separator part and the pressure-sensitive adhesive layer and the receiving sheet part are peeled off, the bridge part is left uncut on the half-cut line, so that the bridge part is formed. In the vicinity, there is a concern that burrs may be generated in the pressure-sensitive adhesive layer and the receiving sheet portion. In order to prevent the occurrence of such burrs, it is effective to apply a quarter-cut process to a substantially central portion of the bridge portion. As the quarter cut processing means, a shallow portion of the blade corresponding to the quarter cut portion may be formed in the blade used when performing the half cut. In the dye thermal transfer receiving sheet of the present invention, there is no particular limitation on the shape, size, and the like of the partial region formed in the image receiving sheet portion, for example, a square, a rectangle, a character, a star,
It can be formed in a circular shape, an elliptical shape, or any other shape and size.

An embodiment of the dye thermal transfer receiving sheet of the present invention will be described with reference to the accompanying drawings. In FIG. 1, a dye thermal transfer receiving sheet 1 (sticker type) of the present invention has a separator portion 4 in which a release treatment layer 3 is provided on a release sheet substrate 2 and an upper surface of a receiving sheet substrate 5. And a receiving sheet portion 7 provided with an image receiving layer 6 is releasably adhered by an adhesive layer 8 formed on the lower surface of the receiving sheet substrate 5. In FIG. 2, after the dye thermal transfer is performed on the image receiving layer 6 of the dye thermal transfer receiving sheet 1 and a desired dye image is transferred, the separator section 4 and the receiving sheet section 7 are separated. At this time, since the adhesive layer 8 is peeled off while being adhered to the lower surface of the receiving sheet part 7, the receiving sheet part carrying the dye image can be adhered to a desired article by the adhesive layer 8.

FIG. 3 shows a half cut 9 made on the receiving sheet portion 7 and the adhesive layer portion 8 of the dye thermal transfer receiving sheet of the present invention. That is, since the receiving sheet portion 7 and the adhesive layer 8 are separated by the half cut, if the half cut 9 is formed in a closed linear shape as shown in FIG. , The cut partial region 10 surrounded by this half-cut closed line
And a frame portion 11 surrounding the cut portion region 10. The cut portion region 10 can be peeled from the receiving sheet 1. However, in the receiving sheet of the present invention, one or more bridge portions (uncut portions) 12 are formed on the half cut line 9. FIG. 4 shows an example in which four cut portions 10 are formed on one receiving sheet 1. However, the shape, size, number, and arrangement of each cut portion are not particularly limited, Can be set appropriately according to

The details of the half cut will be described with reference to FIGS. 4 and 5. FIG. 3 and 4, the half cut line 9
Are discontinuously formed by the bridge portion 12. Therefore, the cut area portion 10 formed by the half cut line 9 is continuous with the frame portion 11 by the bridge portion 12, so that while the receiving sheet is subjected to an operation such as printing, the cut portion area 10 10 is held safely without peeling. However, since the bridge portion 12 is thin, when the cut portion region 10 is separated from the separator portion, the bridge portion 12 is easily cut.
Peeling of the cut portion region 10 is performed without any trouble.

[0011] In the receiving sheet of the present invention, the half-cut line is discontinuously formed by the bridge portion. When the cut portion region 10 surrounded by the discontinuous half-cut line 9 is separated from the separator portion, the bridge portion 12 is cut (teared off). Area 1
Burrs may occur at 0. In order to prevent the formation of burrs, it is preferable to perform a quarter cut on the bridge portion as shown in FIGS. In FIG.
The bridge section 12 which makes the half-cut line 9 discontinuous has a quarter cut 1 at its center and along its length.
Apply 3. In FIG. 7, a quarter cut 13 is formed by cutting about half of the upper surface of the receiving sheet portion 7 so that the tip reaches a depth of approximately half the thickness of the receiving sheet substrate 5. Have been. Therefore, the bridge portion can be cut easily and without burrs by the quarter cut 13. What is Bali
As shown in FIG. 8, small projections generated by tearing of the bridge portion are shown around the peeled cut portion area, for example, the “seal”. According to the present invention,
If the bridge portion is quarter-cut, the bridge portion is cut into a smooth shape without generating burrs.

The receiving sheet substrate used in the present invention includes paper substrates such as coated paper, art paper and woodfree paper, laminated paper obtained by laminating a resin such as polyethylene on the paper substrate, and polyester, nylon and polyolefin. Films such as (for example, polypropylene) are exemplified. These two or more sheets may be laminated. Further, these may be a foam or may have a foam layer. There is no particular limitation on the pulp for producing the receiving sheet base paper. Synthetic pulp or the like using polypropylene or the like as a raw material can be used, or a combination thereof may be used. In addition to the above pulp, various fibers such as acrylic fibers, rayon fibers, phenol fibers, polyamide fibers, organic fibers such as polyester fibers, inorganic fibers such as glass fibers, carbon fibers, and alumina fibers can be mixed. . However, when different types of fibers are mixed, from the viewpoint of maintaining the papermaking properties at a practically feasible level, the pulp content is preferably set to 50% by weight or more. Sheet base paper can be obtained.

The release sheet substrate used in the present invention is mainly composed of glassine paper, pigment-coated paper, polylaminate base paper obtained by laminating polyethylene or the like on glassine paper, pigment-coated paper, or high-quality paper, and polypropylene as a main component. Synthetic paper, a polyethylene terephthalate film, or the like can be used. For forming the release agent layer of the separator portion, for example, a silicone-based release agent can be used. To form the release agent layer, the release agent is applied on one surface of the release sheet base material by a gravure coater, a bar coater, or the like, and dried. In this case, the coating amount of the release agent is
The solid content is preferably 0.3 to 1.5 g / m ² , and more preferably 0.5 to 1.2 g / m ² .
If the coating amount (solid content) of the release agent layer is less than 0.3 g / m ² , the obtained peeling performance may vary widely, and if it exceeds 1.5 g / m ² , the release property may become large. The mold effect saturates and can be economically disadvantageous.

As the pressure-sensitive adhesive used in the present invention, acrylic, synthetic rubber, natural rubber, silicone-based pressure-sensitive adhesives can be used. The pressure-sensitive adhesive is applied to the surface of the release agent layer of the separator portion, and after drying, the formed pressure-sensitive adhesive layer may be bonded to the back surface of the receiving sheet portion having the receiving layer on the front surface side. Then, after a pressure-sensitive adhesive is applied to the back surface of the receiving sheet portion (the surface without the receiving layer) and dried, the release agent layer of the separator portion may be bonded to this pressure-sensitive adhesive layer. In addition, a crosslinking agent and a filler can be added to the adhesive as needed.

The pressure-sensitive adhesive layer has a peeling force between the receiving sheet portion and the separator portion (this peeling force is determined by cutting the dye thermal transfer receiving sheet to a width of 20 mm and separating the receiving sheet portion from the separator portion at a constant speed of 180 mm). (Defined as the load (g / 20mm) required when peeling at a pulling angle of °)
However, when measured at a peel speed of 90 mm / min,
It is preferably adjusted to be 15 g / 20 mm, and more preferably adjusted to be 3 to 10 g / 20 mm. If the peeling force is less than 2 g / 20 mm, unintended peeling of the receiving sheet portion may occur inside the printer, causing troubles such as poor running. On the other hand, if it exceeds 15 g / 20 mm, peeling may occur. Since the force is excessive, it may be difficult to separate the cut portion area of the receiving sheet portion from the separator portion. Means for adjusting the release force include appropriately setting the kind of the pressure-sensitive adhesive, release agent, and, if necessary, the cross-linking agent and the filler, and the application amount of the pressure-sensitive adhesive layer. The application amount of the pressure-sensitive adhesive layer is 10 to 30 g.
/ M ² (solid content). If the amount of the adhesive applied is less than 10 g / m ² , the adhesion may become unstable, and if it exceeds 30 g / m ² , the effect of the adhesive may be saturated and economically disadvantageous.

When the dye thermal transfer receiving sheet travels inside the printer, at least one or more antistatic agent layers are applied to the front and / or back surface of the dye thermal transfer receiving sheet to prevent occurrence of running trouble due to static electricity. You may.

In the present invention, the image receiving layer is formed by
It is preferable to use a resin having a good affinity for the dyeing dye transferred from the ink ribbon, and as such a dye-dying resin, a polyester resin, a polycarbonate resin, a vinyl chloride copolymer, or a cellulose derivative is used. Is preferred. In order to prevent the ink ribbon and the dye image receiving layer from fusing due to heating of the thermal head during printing, a crosslinking agent, a slipping agent, a release agent, etc. are added as necessary to the dye image receiving layer. Is preferred. If necessary, a fluorescent dye, a plasticizer, an antioxidant, a pigment, an ultraviolet absorber and the like may be added to the dye image receiving layer. These additives may be mixed with the main component of the dye image receiving layer and coated, or may be coated as a separate coating layer on and / or below the dye image receiving layer. In the present invention, the dye image receiving layer is formed by using a bar coater, a gravure coater, a comma coater, a blade coater, a coater such as an air knife coater, and applying a coating liquid for forming a receiving layer according to a conventional method, followed by drying. Done.

[0018]

The present invention will be described in more detail with reference to the following examples, which do not limit the scope of the present invention. In Examples, “%” and “parts” indicate “% by weight” and “parts by weight” unless otherwise specified.

[0019] In each of Examples 1-4 and Comparative Examples 1-2 Examples 1-4 and Comparative Examples 1 and 2, mainly composed of polyethylene terephthalate, a foam structure, 5
A film having a thickness of 0 μm (trade name: 50, manufactured by Toray Industries, Inc.)
E63S) as a receiving sheet substrate, and on one surface thereof, a coating composition having the following composition for forming a dye image receiving layer:
1 was applied by a die coating method at a solid content of 8 g / m ² and dried.

Coating composition- 1 component parts by weight Saturated polyester resin (trade name: Byron 200, manufactured by Toyobo Co., Ltd.) 100 parts Silicone resin (trade name: SH3746, manufactured by Toray Dow Corning Silicone Co., Ltd.) 5 parts Toluene / methyl ethyl ketone 5/1 Mixed solvent 595 parts

Formation of pressure- sensitive adhesive layer A pressure-sensitive adhesive layer was formed by the following method. On the opposite side of the receiving sheet substrate, an adhesive (trade name: Olivain BPS-
4891, manufactured by Toyo Ink Co., Ltd.)
/ M ² and dried by application to form an adhesive layer.

The polyolefin adhered to the separator portion is a main component, and has a foamed structure and a thickness of 100 μm.
Film (manufactured by Diafoil Hoechst)
(Trademark: W900J) as a release sheet substrate, and one surface thereof is provided with a silicone release agent (manufactured by Shin-Etsu Chemical Co., Ltd.).
(Trademark: KS-830) was applied by a gravure coating method so as to have a solid content of 0.6 g / m ² and dried to form a release agent layer, thereby producing a separator paper. The release agent layer of the separator paper and the pressure-sensitive adhesive layer on the receiving sheet substrate were overlapped and adhered. Next, discontinuous half-cut was performed on the image receiving sheet portion so that the bridge portion shown in Table 1 below was left, to prepare a dye thermal transfer receiving sheet having a cut portion region. In Examples 1 and 2, a quarter cut having a depth of 25 μm was applied to the entire width of the bridge at the center of the bridge along the width direction.

[0023]

[Table 1]

Runability test 50 sheets of the dye thermal transfer receiving sheet were subjected to a sublimation video printer (trade name: CVP-G7, manufactured by Sony), and the runnability in the printer was evaluated in the following two grades. ：: No peeling of the image receiving sheet portion occurred in the printer. ×: Peeling of the cut portion area of one to four sheets of the image receiving sheet portion occurred in the printer. Table 2 shows the evaluation results.

Peeling Test After printing on the printer, a simple test was conducted in which the cut area of the image receiving sheet was peeled by hand. The results were evaluated in the following three grades and are shown in Table 2. A: Peeled off easily. ：: There was some resistance to peeling, but there was no problem in practical use of the peeled partial area. X: The peeling is difficult, the peeled partial area is bent, and cannot be put to practical use.

Peeling Test In Examples 1 and 2 and Comparative Example 1, the occurrence of burrs due to peeling of the cut portion area was tested. Result 3
It was rated on a scale. Table 2 shows the results. A: Almost no burrs were observed. ：: Fine burrs were observed, but there was no practical problem. X: Large burrs are formed and cannot be put to practical use.

[0027]

[Table 2]

[0028]

According to the dye thermal transfer receiving sheet of the present invention, the image receiving sheet portion is provided with a bridge portion in a half-cut for defining the cut portion region so that the bridge portion is discontinuous, so that the cut portion region is formed before the transfer. , And during the transfer process (printing), it is stably held on the separator part,
Therefore, no trouble occurs during the transfer operation, and after the transfer processing, the cut portion area carrying the image can be easily peeled off from the separator portion. Further, by performing a quarter cut on the bridge portion, it is possible to prevent burrs from being generated in the separated cut portion region. Therefore, the dye thermal transfer receiving sheet of the present invention has high practical value as a sticking tack sheet.

[Brief description of the drawings]

FIG. 1 is a cross-sectional explanatory view showing a configuration of a dye thermal transfer receiving sheet of the present invention.

FIG. 2 is a cross-sectional explanatory view showing a peeling state of a receiving sheet portion and a separator portion in the receiving sheet of FIG.

FIG. 3 is an explanatory sectional view showing a situation when the receiving sheet of FIG. 1 is subjected to a half cut.

FIG. 4 is an explanatory plan view showing an example of a situation in which half-cut leaving a bridge portion has been performed on the dye thermal transfer receiving sheet of the present invention.

FIG. 5 is an explanatory partial plan view showing an example of a half cut in which a bridge portion is left.

FIG. 6 is an explanatory partial plan view showing an example of performing quarter cut on a bridge portion left during half cut.

FIG. 7 is an explanatory cross-sectional view showing an example of performing a quarter cut on a receiving sheet portion.

FIG. 8 is an explanatory plan view showing an example of burrs generated in a cut portion area that has been peeled off.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Dye thermal transfer receiving sheet 2 ... Peeling sheet base material 3 ... Release processing layer 4 ... Separator part 5 ... Receiving sheet base material 6 ... Image receiving layer 7 ... Receiving sheet part 8 ... Adhesive layer 9 ... Half cut 10 ... Cut part area 11 ... Frame part 12 ... Bridge part 13 ... Quarter cut 14 ... Burr

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hidetada Sawamoto 1-10-6 Shinonome, Koto-ku, Tokyo Oji Paper Co., Ltd. Shinonome Research Center (72) Inventor Hikaru Kobayashi 6-7 Kita Shinagawa, Shinagawa-ku, Tokyo No. 35 Inside Sony Corporation (72) Inventor Shige Wada 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Kiyoshi Nagata 2-3-3 Nihonbashi Kodenmacho, Chuo-ku, Tokyo Oji Chemical Co., Ltd.

Claims (3)

[Claims] 1. A separator part (4) having a release sheet substrate (2) and a release agent layer (3) formed on one surface thereof, a receiving sheet substrate (5), and one surface thereof An image receiving sheet portion (7) having a dye image receiving layer (6) formed thereon, and an adhesive layer (8) formed on the opposite surface of the image receiving sheet substrate, wherein the separator portion The release agent layer and the receiving sheet substrate of the image receiving sheet portion are releasably adhered via the adhesive layer, and the image receiving sheet portion, or the image receiving sheet portion and the adhesive layer A half-cut process for leaving at least one bridge portion (9) having a length of 1.5 mm or less, thereby forming at least one partial region. Thermal transfer receiving sheet. 2. The dye thermal transfer receiving sheet according to claim 1, wherein 1 to 3 bridge portions having a length of 1.5 mm or less are provided per 10 mm of the half cut length. 3. At approximately the center of each of said bridges,
A quarter cut treatment is performed.
3. The dye heat transfer receiving sheet according to item 1.