JPH0446938Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a thermal transfer sheet used in a thermal transfer recording means, and more particularly to a thermal transfer sheet that can be attached to various articles after image transfer.

[Problems to be solved by conventional techniques and ideas]

In recent years, a thermal transfer sheet is heated using a thermal head or the like whose heat generation is controlled by an electric signal, and the sublimable dye in the coloring material layer is transferred onto the thermal transfer sheet to create an image according to the image information. A thermal transfer recording method that records images is widely used, and the thermal transfer sheet used in this recording method is not only capable of recording transferred images, but also allows the sheet after transfer recording to be freely attached to various articles. A so-called label-type thermal transfer sheet that can be used is desired.

The present invention was developed in view of the above-mentioned problems, and is a label-type thermal transfer device that can record a good transferred image and also allows the sheet part that serves as a separator to be easily and quickly peeled off after recording the transferred image. The purpose is to provide sheets.

[Means for solving problems]

The present invention is a thermal transfer sheet formed by sequentially laminating a release layer, an adhesive layer, a sheet base material, and an image receiving layer on a release sheet. The object of the present invention is to provide a thermal transfer sheet that can be separated from an image-receiving sheet portion consisting of a base material and an image-receiving layer, and is characterized in that the support portion is subjected to a half-cut treatment.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

The thermal transfer sheet 1 of the present invention has a laminated structure in which a release layer 3, an adhesive layer 4, a sheet base material 5, and an image-receiving layer 6 are sequentially laminated on a release sheet 2, as shown in FIG. In the figure, 7 indicates a cut line created by the half-cut process.

Further, the thermal transfer sheet 1 of the present invention has a structure that can be peeled off between the support portion 8 consisting of the release sheet 2 and the release layer 3 and the image receiving sheet portion 9 consisting of the adhesive layer 4, the sheet base material 5 and the image receiving layer 6. As shown in FIG. 2, after recording the image, the support 8 can be peeled off from the image-receiving sheet portion 9 along the score line 7.

The image-receiving sheet portion 9 is a portion that is separated from the support portion 8 and attached to various articles after recording a transferred image, and an image-receiving layer 6 is provided on the sheet base material 5.
It is constructed by providing an adhesive layer 4 on the back surface that enables attachment to the surface of a desired article.

As the sheet base material 5, polyethylene terephthalate film is most preferably used, but resin films made of hard vinyl chloride, acrylic, vinylidene chloride, polyolefin, etc. may also be used. The thickness of the base material 5 is 10 to 200 μm.

The image-receiving layer 6 is a layer that receives dye transferred from the thermal transfer sheet by heating during transfer recording.
Any material can be used as long as it is a material that has been conventionally used for forming the image receiving layer of this type of thermal transfer sheet, such as saturated polyester resin, polyacrylic acid ester resin, vinyl chloride-vinyl acetate, etc. Examples include polymers, polystyrene resins, polyamide resins, etc., which may be used alone or in combination.

Furthermore, a release agent layer can be provided on the surface of the image-receiving layer 6 to provide good releasability from the thermal transfer sheet. The release agent layer can be formed by incorporating a release agent into the material when using a release agent that is highly compatible with the material for forming the image-receiving layer, or when the material is not compatible with the material. can be formed by thinly coating the surface of the image-receiving layer. As the mold release agent, silicone oil (for example, a combination of epoxy-modified silicone and amino-modified silicone), fluorine-based or phosphate-based surfactant, etc. can be used.

Examples of the material for the adhesive layer 4 include polyacrylic acid ester, acrylic copolymer, natural rubber, synthetic rubber, petroleum resin, and block copolymers such as SIS and SBR. Moreover, an adhesive reinforcing agent, a plasticizer, a filler, etc. can be added to the above-mentioned adhesive as necessary.

On the other hand, the support section 8 provided below the image-receiving sheet section 9 is composed of a release sheet 2 and a release layer 3 formed on the sheet 2.

As the release sheet 2, synthetic paper, cellulose fiber paper, a synthetic resin sheet having a finely uneven surface, or the like is used. Examples of synthetic paper include those made by adding a filler to a polyolefin resin, extruded and stretched, and those made by coating a polyolefin, polystyrene, or polyester sheet with a mixture of a filler and a binder. As the cellulose fiber paper, high quality paper, coated paper, art paper, cast coated paper, processed paper impregnated with, coated with, or internally added with synthetic resin or rubber can be used. In addition, the synthetic resin sheet having a finely uneven surface may be a sheet extruded with a filler such as clay, calcium carbonate, or titanium oxide, or a laminated paper obtained by extrusion on top of high-quality paper, or a sheet whose surface is sandblasted. Alternatively, a material with fine irregularities formed by an embossing method or the like may be used.

The release layer 3 connects the release sheet 2 to the image receiving sheet portion 9.
In order to be easily peelable from the adhesive layer 4 and the mold release layer 3 (specifically, between the adhesive layer 4 and the mold release layer 3), it is formed using a silicone mold release agent mainly composed of polymethylsiloxic acid or polyolefin.

In manufacturing the thermal transfer sheet 1 of the present invention having the laminated structure as described above, first, a release layer 3 is provided on a release sheet 2 to form a support portion 8, and a separate layer is formed on a sheet base material 5. An image receiving layer 6 is provided on the bottom surface of the substrate 5, and an adhesive layer 4 is provided on the lower surface of the base material 5 to form an image receiving sheet portion 9. After that, the release layer 3 and the adhesive layer 4 are made to face each other to form the support portion 8 and the image receiving sheet portion. Laminate 9.

As shown in FIG. 1, the thermal transfer sheet 1 of the present invention has a half-cut structure in which a cut line 7 is provided at a predetermined location of the support portion 8, which penetrates through all the layers constituting the support portion 8, in a layered structure having a laminated structure. Processing is performed. By performing this half-cut treatment, the peeling operation for peeling the support portion 8 from the image-receiving sheet portion 9 after recording the transfer image can be performed easily and quickly. That is, for example, when the thermal transfer sheet 1 is warped with the release sheet 2 on the outside, the support portion 8 begins to peel off naturally around the score line 7 as a boundary, as shown in FIG. The support portion 8 can be completely peeled off from the image receiving sheet portion 9. The cut lines 7 are provided at predetermined locations on the support part 8, for example, as shown in FIG. The shape of the line and the like are set as appropriate. Further, the half-cutting process is usually performed by controlling the depth of penetration using a commercially available punching machine or the like after the thermal transfer sheet is laminated.

The thermal transfer sheet 1 of the present invention can provide an intermediate layer having cushioning properties between the sheet base material 5 and the image-receiving layer 6, and when this intermediate layer is provided, images with less noise and corresponding to image information can be formed. can be transferred and recorded with good reproducibility. Examples of the material constituting the intermediate layer include urethane resin, acrylic resin, ethylene resin, butadiene rubber, and epoxy resin. The thickness of the intermediate layer is 2~20μ
m is preferred.

Further, in the thermal transfer sheet 1 of the present invention, a writing treatment layer 10 can be provided at a predetermined location on the image receiving layer 6, as shown in FIG. This writing processing layer 10 is a layer that allows writing with a pencil, ballpoint pen, fountain pen, etc., and other markings. Conventionally, by providing this layer 10, writing can be performed because the image receiving layer 6 is usually a resin film surface. The impossibility of printing and stamping has been overcome, and comments and the like can be freely written on the layer. The writing processing layer 10 is formed using a mixture of resin such as hydroxyethyl cellulose, polyvinyl acetate, styrene-maleic acid copolymer, and ethylene vinyl acetate copolymer with calcium carbonate, silica, clay, and the like.

Incidentally, it is also possible to provide a detection mark on the thermal transfer sheet of the present invention. The detection mark is extremely convenient when positioning the thermal transfer sheet and the thermal transfer sheet, and for example, a detection mark that can be detected by a phototube detection device can be provided by printing on the back surface of the release sheet 2 or the like. By providing this detection mark, when overlapping transfer is performed using thermal transfer sheets of each color, positioning can be performed accurately, and as a result, a color image with good reproducibility can be obtained.

Further, in the thermal transfer sheet of the present invention, the back surface of the release sheet 2 can contain an antistatic agent.
By containing an antistatic agent, it is possible to make the sheets slide more smoothly, and
This has the effect of preventing dust, etc. from adhering to the thermal transfer sheet. The antistatic agent may be contained in the release sheet 2 or the image-receiving layer 6, or it can be provided as an antistatic agent layer on the back surface of the release sheet 2, but it is preferable to provide it as an antistatic agent layer on the back surface of the release sheet 2. is preferred.

Furthermore, in the thermal transfer sheet of the present invention, a slippery layer can be provided on the back surface of the release sheet 2. Thermal transfer sheets are stacked and transferred one by one to perform the transfer.At this time, the sheets provided with a slippery layer slide smoothly against each other, and together with the antistatic treatment described above, it is possible to accurately take out one sheet at a time. I can do it. Examples of the slipping layer include methacrylate resins such as methyl methacrylate or corresponding acrylate resins, and vinyl resins such as vinyl chloride-vinyl acetate copolymer.

When actually using the thermal transfer sheet 1 of the present invention constructed as described above, it is combined with a thermal transfer sheet, and the dye in the color material layer of the thermal transfer sheet is transferred to the thermal transfer sheet 1 by heating with a thermal head or the like.
A transfer image is formed on the thermal transfer sheet 1 by transferring to the image receiving layer 6, and then, as shown in FIG.
Starting from this, the support portion 8 is peeled off from the image receiving sheet portion 9, and then, as shown in FIG. 3, the support portion 8 is completely removed, and the image receiving sheet portion 9 on which the transferred image 11 is formed is It is pasted on the desired object 12 to be pasted. The object to be affixed 12 may be any article as long as it can be affixed.

[Effect of idea]

As explained above, since the support part of the thermal transfer sheet of the present invention has been subjected to a half-cut process, the support part begins to peel off easily from the image-receiving sheet part due to the cut lines caused by the above-mentioned process.
As a result, there is an excellent effect that the peeling operation of the support portion can be performed easily and quickly.

In addition, since the heat transfer sheet of the present invention has a structure that is roughly divided into a support part and an image receiving sheet part, the mechanical strength of the heat transfer sheet is reinforced by the support part during image recording, so it is easy to run in printers etc. A transfer image is recorded with good image density, reproducibility, etc., and on the other hand, after image recording, the image-receiving sheet part separates from the support part and has a thinner layer thickness than when it has a support part. Since it is applied to the article in the form of a chisel, it has excellent adhesion suitability (for example, even if the object to be applied has a curved shape, it can be applied in a way that conforms to the surface).

Furthermore, according to the present invention, when pasting a thin layer (in other words, a material with a limited layer thickness) onto a card or the like, it is possible to peel off the entire support part at once. If this is removed, only the thin image-receiving sheet will remain, making it difficult to hold and attach. By performing a half-cut process to allow the image to be peeled off, by peeling off only the supporting portion at the center when pasting, the thin image-receiving sheet portion can be supported by the supporting portion at the periphery. Therefore, it becomes easier to grasp, and as a result, there is a practical effect that it becomes easier to perform the pasting operation.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the thermal transfer sheet of the present invention, FIG. 2 is a vertical cross-sectional view showing the state in which the support portion is peeled off from the image receiving sheet portion of the thermal transfer sheet, and FIG. 3 is a vertical cross-sectional view of the thermal transfer sheet of the present invention. FIG. 4 is a vertical cross-sectional view showing a state in which the image-receiving sheet portion of the thermal transfer sheet is attached to an object to be pasted, and FIG. 4 is an explanatory plan view showing various aspects of the cut lines formed by the half-cut process applied to the support portion. 1... Heat transfer sheet, 2... Peeling sheet, 3
...Release layer, 4...Adhesive layer, 5...Sheet base material,
6... Image receiving layer, 8... Support body part, 9... Image receiving sheet part.

Claims (1)

[Claims for Utility Model Registration] (1) A thermal transfer sheet formed by sequentially laminating a release layer, an adhesive layer, a sheet base material, and an image-receiving layer on a release sheet, the support comprising the release sheet and the release layer; A thermal transfer sheet characterized in that it is removable between a body part and an image-receiving sheet part comprising the above-mentioned adhesive layer, a sheet base material, and an image-receiving layer, and the support part is subjected to a half-cut treatment. (2) The thermal transfer sheet according to claim 1, which has an intermediate layer between the sheet base material and the image-receiving layer. (3) The thermal transfer sheet according to claim 1, which is provided with a release agent layer on the surface of the image-receiving layer. (4) The thermal transfer sheet according to claim 1 of the utility model registration claim, wherein a writing processing layer is provided on the image-receiving layer.