JP7047443B2 - Method for manufacturing thermal transfer image receiving sheet and printed matter - Google Patents

Description

The present invention relates to a thermal transfer image receiving sheet, a printed matter and a printing system in which images are formed on both sides by sublimation transfer.

Conventionally, a monotonous image such as a gradation image, characters, and symbols has been formed on a base material by using a thermal transfer method. As the thermal transfer method, a sublimation transfer method and a melt transfer method are widely used. Of these, the sublimation transfer method uses a thermal transfer sheet in which a dye layer in which a sublimation dye used as a coloring material is melted or dispersed in a binder resin is supported on a base sheet, and this thermal transfer sheet is used as a dye receiving layer. By superimposing on the provided thermal transfer image receiving sheet and applying energy according to the image information to a heating device such as a thermal head, the sublimation dye contained in the dye layer on the thermal transfer sheet is transferred to the thermal transfer image receiving sheet to transfer the image. It is a method of forming. Here, as a printer that prints on a sheet-fed thermal transfer image receiving sheet by sublimation transfer, for example, one disclosed in Patent Document 1 is known.

In producing a single-wafer-shaped thermal transfer image-receiving sheet having a predetermined shape, as shown in FIG. 6, a plurality of single-wafer-shaped thermal transfer image-receiving sheets larger than the predetermined shape are stacked, and the laminated single-wafer-shaped thermal transfer image-receiving sheets are used. A frame-shaped blade 90 having a substantially quadrangular shape when viewed from above is pressed against the sheet bundle 80. Then, by punching the sheet bundle 80 with the frame-shaped blade 90 as shown in the direction of the arrow in FIG. 6, each thermal transfer image receiving sheet of the sheet bundle 80 is cut at once by the edge portion 92 of the blade 90. In this way, a single-wafer-shaped thermal transfer image receiving sheet having a predetermined shape is produced.

Japanese Unexamined Patent Publication No. 2014-118229

As shown in FIG. 6, when the sheet bundle 80 is punched out by the frame-shaped blade 90 and each thermal transfer image receiving sheet of the sheet bundle 80 is cut at once by the edge portion 92 of the blade 90, the thermal transfer image receiving sheet of each sheet is cut. Warpage (burrs) may occur at the edges. Specifically, as shown in FIG. 6, when the frame-shaped blade 90 is punched downward from above with respect to the sheet bundle 80, the edge portion of each thermal transfer image receiving sheet may warp downward. If such a warp occurs at the edge of the heat transfer image receiving sheet, there is a possibility that the printing quality may deteriorate when printing is performed on the heat transfer image receiving sheet by a heating device such as a thermal head. Here, when an image is formed on only one side of the thermal transfer image receiving sheet, the front and back sides of the thermal transfer receiving sheet are inverted so that the warp of the edge faces the opposite side with respect to the thermal head (that is, thermal transfer). By making the warp of the edge of the image receiving sheet face the opposite side to the thermal transfer sheet), it is possible to prevent the printing quality from deteriorating when printing is performed on the thermal transfer image receiving sheet. However, when an image is formed on both sides of the thermal transfer image receiving sheet, the warp of the edge of the thermal transfer receiving sheet faces the thermal head side when printing is performed on either the front or back surface of the thermal transfer image receiving sheet. Therefore, the printing quality is deteriorated.

The present invention has been made in consideration of such points, and can maintain good printing quality even if images are formed on both sides of the thermal transfer image receiving sheet by sublimation transfer, a thermal transfer image receiving sheet, a printed matter, and a print. The purpose is to provide a system.

The thermal transfer image receiving sheet of the present invention is a thermal transfer image receiving sheet in which images are formed on both sides by sublimation transfer, and has a first edge extending in a direction orthogonal to a transport direction, which is a moving direction with respect to a heating device, and the transport direction. The height of the warp of the first edge portion, which is the height of the first edge portion with respect to a portion 10 mm inward from the first edge portion along the transport direction. It is characterized in that the size is 75 μm or less.

According to such a thermal transfer image receiving sheet, the height of the warp of the first edge extending in the direction orthogonal to the transport direction, which is the moving direction with respect to the heating device, is 75 μm or less, so that the image is transferred to both sides by sublimation transfer. Even if it is formed, the print quality can be kept good.

In the thermal transfer image receiving sheet of the present invention, the height of the warp of the first edge portion may be within the range of 5 μm or more and 75 μm or less.

The thermal transfer image receiving sheet of the present invention may have a base material and a receiving layer laminated on both sides of the base material.

In this case, the base material may be made of a laminated body.

Further, the thermal transfer image receiving sheet of the present invention may further have a resin layer between the base material and each of the receiving layers.

In this case, the resin layer may be a polyethylene terephthalate film.

Further, the thermal transfer image receiving sheet of the present invention may have a thickness in the range of 100 μm or more and 1000 μm or less.

In this case, the thickness may be 400 μm or more.

Further, in the printed matter of the present invention, an image is formed on the receiving layer in the above-mentioned thermal transfer image receiving sheet.

The printing system of the present invention is a printing system including a thermal transfer image receiving sheet in which images are formed on both sides by sublimation transfer, and a printer in which an image is formed by sublimation transfer of the thermal transfer image receiving sheet by a heating device. The thermal transfer image receiving sheet includes a first edge portion extending in a direction orthogonal to a transport direction, which is a moving direction with respect to the heating device, and a second edge portion extending along the transport direction, from the first edge portion. It is characterized in that the height of the warp of the first edge portion, which is the height of the first edge portion with respect to the portion 10 mm inside along the transport direction, is 75 μm or less.

According to the thermal transfer image receiving sheet, the printed matter and the printing system of the present invention, the printing quality can be kept good even if an image is formed on both sides of the thermal transfer image receiving sheet by sublimation transfer.

It is a top view which shows the structure of the sheet-fed thermal transfer image receiving sheet by embodiment of this invention. It is a side view which shows an example of the structure of the thermal transfer image receiving sheet shown in FIG. It is explanatory drawing which shows the method of defining the height of the warp formed in the 1st edge part of the thermal transfer image receiving sheet shown in FIG. FIG. 3 is a side view showing an operation of forming an image by sublimation transfer of a thermal transfer image receiving sheet shown in FIG. 1 by a heating device such as a thermal head. It is a side view which shows the other example of the structure of the thermal transfer image receiving sheet shown in FIG. It is a perspective view which shows the operation of producing the sheet-fed-shaped thermal transfer image receiving sheet of a predetermined shape by punching a sheet bundle with a blade.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 6 are diagrams showing a configuration of a single-wafer-shaped thermal transfer image receiving sheet according to the present embodiment, an operation of forming an image by sublimation transfer to the thermal transfer image receiving sheet, and the like.

As shown in FIG. 1, the sheet-fed thermal transfer image receiving sheet 10 according to the present embodiment has a rectangular shape in which images are formed on both sides by sublimation transfer. In FIG. 1, the arrow on a white background indicates the transport direction (printing direction) which is the moving direction with respect to the heating device 40 such as the thermal head described later. As shown in FIG. 1, the thermal transfer image receiving sheet 10 has a first edge portion 16 extending in a direction orthogonal to the transport direction and a pair of second edge portions 18 extending along the transport direction.

Further, as shown in FIG. 2, the sheet-fed thermal transfer image receiving sheet 10 according to the present embodiment has a multi-layer structure in which a receiving layer 28 is laminated on both sides of a base material 20. More specifically, as shown in FIG. 2, the resin layer 24 is attached to both the front and back surfaces of the base material 20 by the adhesive 22, and the primer layer 26 is provided on the outside of each resin layer 24, respectively. .. Further, a receiving layer 28 is provided on the outside of each primer layer 26, and each receiving layer 28 is exposed to the outside.

Since the base material 20 has a role of holding a pair of receiving layers 28 and heat is applied during thermal transfer, it is preferable that the base material 20 is a material having mechanical strength to such an extent that it does not hinder handling even in an overheated state. .. The base material 20 is not particularly limited, and is, for example, condenser paper, glassin paper, sulfate paper, high-sized paper, synthetic paper (polyolefin-based, polystyrene-based), high-quality paper, and art paper. , Coated paper, cast coated paper, wallpaper, backing paper, synthetic resin or emulsion impregnated paper, synthetic rubber latex impregnated paper, synthetic resin inner sheet paper, paperboard, etc., cellulose fiber paper, or polyester, polyacrylate, polycarbonate, polyurethane, polyimide , Polyetherimide, cellulose derivative, polyethylene, ethylene-vinyl acetate copolymer, polypropylene, polystyrene, acrylic, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl butyral, nylon, polyether ether ketone, polysulfone, polyether monkey Films such as phon, tetrafluoroethylene, perfluoroalkyl vinyl ether, polyvinylfluoride, tetrafluoroethylene-ethylene copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, polychlorotrifluoroethylene, polyvinylidene fluoride, etc. are listed. Further, a white opaque film formed by adding a white pigment or a filler to these synthetic resins can also be used, but is not limited thereto. Further, as the base material 20, a laminated body made of any combination of the above materials can also be used. Examples of a typical laminate include a laminate of cellulose fiber paper and synthetic paper, or a laminate of cellulose synthetic paper and a plastic film. The thickness of the base material 20 can be appropriately changed depending on the strength and heat resistance required for the thermal transfer image receiving sheet and the material of the material used as the base material 20.

When a paper base material is used as the base material 20, it is preferable to provide resin layers 24 on both the front and back surfaces of the paper base material. As the resin layer 24, it is preferable to provide a polyolefin resin layer, for example, high-density polyethylene, medium-density polyethylene, low-density polyethylene, polyethylene terephthalate, polypropylene, polybutene, polyisobutylene, polyisobutylene, polybutadiene, polyisoprene, ethylene-vinyl acetate. Examples thereof include ethylene copolymers such as copolymers, and among them, polypropylene and polyethylene terephthalate are preferably used. When a thermal transfer image receiving sheet 10 having receiving layers 28 provided on both the front and back surfaces is used, such a resin layer 24 may be omitted.

The receiving layer 28 formed on both sides of the base material 20 in the thermal transfer image receiving sheet 10 receives the sublimation dye transferred from the thermal transfer ink sheet during image formation by thermal transfer, and retains the received sublimation dye in the receiving layer 28. By doing so, an image is formed and maintained on the surface of the receiving layer 28. In the present embodiment, the receiving layer 28 is formed by using a vinyl chloride resin, but may further contain a cross-linking agent, a mold release agent, and other additives. As the vinyl chloride resin, polyvinyl chloride or a vinyl chloride-vinyl acetate copolymer (vinyl chloride resin) can be preferably used.

In the present embodiment, the thermal transfer image receiving sheet 10 whose thickness is generally in the range of 100 μm or more and 1000 μm or less is used. Further, it is more preferable to use a thick thermal transfer image receiving sheet 10 having a thickness of 400 μm or more in general. Further, the length of the first edge portion 16 of the thermal transfer image receiving sheet 10 is preferably in the range of 20 mm or more and 100 mm or less, and more preferably in the range of 40 mm or more and 80 mm or less. Further, the length of the second edge portion 18 of the thermal transfer image receiving sheet 10 is preferably in the range of 40 mm or more and 120 mm or less, and more preferably in the range of 60 mm or more and 100 mm or less. Further, the ratio of the length of the second edge portion 18 to the length of the first edge portion 16 in the thermal transfer image receiving sheet 10 (that is, the length of the second edge portion 18 ÷ the numerical value of the length of the first edge portion 16) is It is preferably in the range of 1 or more and 2 or less, and more preferably in the range of 1.5 or more and 1.8 or less.

Next, the operation of forming an image on both the front and back surfaces of the thermal transfer image receiving sheet 10 will be briefly described with reference to FIG. A printer that prints on a single-wafer heat transfer image receiving sheet 10 by sublimation transfer includes a heating device 40 such as a thermal head and a platen roller 42 provided at a position facing the heating device 40, and receives a heat transfer image. A printing position on the sheet 10 is formed between the heating device 40 and the platen roller 42. Then, as shown in FIG. 4, when the thermal transfer image receiving sheet 10 and the thermal transfer sheet 30 such as the ink ribbon are superposed and conveyed to the gap between the heating device 40 and the platen roller 42, the heating device 40 causes the thermal transfer sheet 30 to be conveyed. The thermal transfer image receiving sheet 10 and the thermal transfer sheet 30 are pressed toward the platen roller 42 and heated. The transport direction of the thermal transfer image receiving sheet 10 at this time (that is, the left direction in FIG. 4) is the direction indicated by the arrow on the white background in FIG. The heating device 40 is a plurality of heat generating elements (not shown) arranged along the width direction (vertical direction in FIG. 1) of the thermal transfer image receiving sheet 10, that is, the direction orthogonal to the paper surface of FIG. 4 at the position corresponding to the printing position. By selectively heating some of these heat-generating elements among these plurality of heat-generating elements, the dye formed on the surface of the thermal transfer sheet 30 in a pattern corresponding to the image to be printed can be obtained. It is sublimated and transferred to the thermal transfer image receiving sheet 10, whereby printing on the thermal transfer image receiving sheet 10 can be performed. In the present embodiment, the print system is configured by such a thermal transfer image receiving sheet 10 and a printer. In the printing system, when an image is formed on the thermal transfer image receiving sheet 10 by the printer, the thermal transfer image receiving sheet 10 is formed. Is adapted to move in the extending direction of the second edge 18 of the thermal transfer image receiving sheet 10 with respect to the heating device 40.

More specifically, the printing by the heating device 40 is designed to separately apply the three primary colors of yellow (Y), magenta (M), and cyan (C) and the overcoat agent (OC). In addition, the thermal transfer sheet 30 is provided with a region for each color and an overcoat agent separately. That is, until all the printings are completed on the same thermal transfer image receiving sheet 10, the thermal transfer image receiving sheet 10 is conveyed in the printing direction while printing is performed, and the thermal transfer image receiving sheet 10 is conveyed in the opposite direction and aligned with the printing start position again. , The operation of performing the next printing is repeated. Of course, when printing with only a single color is sufficient, it is sufficient to discharge the printing as it is after printing without repeating the printing operation. It should be noted that even if the printing is performed in a single color only, the printing may be repeated several times in the same printing area.

Further, in the present embodiment, in order to form an image on both the front and back surfaces of the thermal transfer image receiving sheet 10, after printing is performed on one surface of the thermal transfer image receiving sheet 10 by the heating device 40, the front and back surfaces of the thermal transfer image receiving sheet 10 are formed. By inverting the above, printing is performed by the heating device 40 on the other surface of the thermal transfer image receiving sheet 10.

Here, in the thermal transfer image receiving sheet 10 of the present embodiment, a portion that is 10 mm inside from the first edge portion 16 along the transport direction (that is, is 10 mm inside from the first edge portion 16 in FIG. 1). The height of the warp of the first edge portion 16, which is the height of the first edge portion 16 with respect to the location), is within the range of 5 μm or more and 75 μm or less. A method of defining the height of the warp of the first edge portion 16 will be described with reference to FIG. As shown in FIG. 3, the warp height a of the first edge portion 16 is a portion of the thermal transfer image receiving sheet 10 that is 10 mm inward along the transport direction from the first edge portion 16 (that is, at the reference numeral P). It is the height of the first edge portion 16 with respect to the indicated portion). The height of such warpage is measured over the entire length of the first edge portion 16. In such a measurement, the thermal transfer image receiving sheet 10 having a warp height of more than 75 μm is not used at any one point in the total length of the first edge portion 16. If printing is performed by the heating device 40 on the thermal transfer image receiving sheet 10 in which the warp height of the first edge portion 16 is larger than 75 μm, when printing is performed on the thermal transfer image receiving sheet 10 by the heating device 40. This is because the printing quality may deteriorate. Further, when the height of the warp of the first edge portion 16 of the thermal transfer image receiving sheet 10 is to be smaller than 5 μm, a predetermined sheet bundle 80 is punched out by a frame-shaped blade 90 as shown in FIG. There is a problem that the non-defective rate decreases when the sheet-fed thermal transfer image receiving sheet 10 having a shape is produced. As described above, in the present embodiment, it is preferable to use the thermal transfer image receiving sheet 10 such that the warp height of the first edge portion 16 is within the range of 5 μm or more and 75 μm or less, whereby both sides thereof are subjected to sublimation transfer. Even if an image is formed on the surface, the print quality can be kept good.

Further, in the present embodiment, among the edges of the thermal transfer image receiving sheet 10, not only the first edge 16 on the front end side in the transport direction (that is, the left edge of the thermal transfer image receiving sheet 10 in FIG. 1) but also the transport. The height of the warp of the first edge portion 16 on the rear end side in the direction (that is, the right edge portion of the thermal transfer image receiving sheet 10 in FIG. 1) is also within the range of 5 μm or more and 75 μm or less.

Regarding the second edge portion 18 extending along the transport direction in the thermal transfer image receiving sheet 10, there is no particular inconvenience even if the warp height of the second edge portion 18 is larger than 75 μm. As shown in FIG. 4, when printing is performed on the thermal transfer image receiving sheet 10 by the heating device 40, the thermal transfer image receiving sheet 10 and the thermal transfer sheet 30 are transferred to the gap between the heating device 40 and the platen roller 42 in a superposed state. Then, the thermal transfer image receiving sheet 10 and the thermal transfer sheet 30 are pressed toward the platen roller 42 by the heating device 40, so that while the thermal transfer image receiving sheet 10 is sandwiched between the heating device 40 and the platen roller 42. This is because the warp of the second edge portion 18 is corrected so as to be flat by the pressing force of the heating device 40.

The thermal transfer image receiving sheet according to the present invention is not limited to the above-described aspect, and various modifications can be made.

For example, as a thermal transfer image receiving sheet, a sheet having a rectangular printing portion in which images are formed on both sides by sublimation transfer and a handle portion gripped by an operator may be used. In this case, after the image is formed on both sides of the printing portion by sublimation transfer, the boundary line between the printing portion and the handle portion is cut so that the handle portion is separated from the printing portion. Become. In such a thermal transfer image receiving sheet, there is no particular inconvenience even if the height of the warp of the edge portion extending in the direction orthogonal to the transport direction in the handle portion is larger than 75 μm.

Further, as the thermal transfer image receiving sheet according to the present invention, a sheet in which an image receiving layer is transferred to a substrate by melt transfer and then an image is formed on the image receiving layer by sublimation transfer may be used. The thermal transfer image receiving sheet according to such a modification will be described with reference to FIG. In the thermal transfer image receiving sheet 10a shown in FIG. 5, the resin layers 24 are attached to both the front and back surfaces of the base material 20 by an adhesive 22, and each resin layer 24 is exposed to the outside. Further, when printing is performed on such a thermal transfer image receiving sheet 10a, the image receiving layer is first transferred to the outside of the resin layer 24 by melt transfer, and then the image is received by sublimation transfer by a heating device such as a thermal head. An image is formed on the layer. That is, the receiving layer is superposed on the outer side of the resin layer 24 of the thermal transfer image receiving sheet 10a shown in FIG. 5, and then an image is formed on the image receiving layer. Even in such a thermal transfer image receiving sheet 10a, the height of the warp of the first edge extending in the direction orthogonal to the transport direction, which is the moving direction with respect to the heating device, is within the range of 5 μm or more and 75 μm or less. As described above, even in the thermal transfer image receiving sheet 10a shown in FIG. 5, by setting the warp height of the first edge portion to 75 μm or less, the image receiving layer is superposed on the outside of the resin layer 24 and then the image is received by sublimation transfer. Even if an image is formed on both sides of the layer, the printing quality can be kept good.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. The present invention is not limited to the following examples.

[Example 1]
As the thermal transfer image receiving sheet according to Example 1, a multilayer structure having receiving layers on both sides of the base material was prepared. Specifically, as shown in FIG. 2, a resin layer is provided on both the front and back surfaces of the base material with an adhesive, a primer layer is provided on the outside of each resin layer, and further, a primer layer is provided on the outside of each primer layer. A thermal transfer image receiving sheet was prepared in which a receiving layer was provided and each receiving layer was exposed to the outside. The method for producing such a thermal transfer image receiving sheet will be described in detail below.

(Creation of thermal transfer image receiving sheet)
A primer layer coating liquid having the following composition is applied onto a 12 μm-thick PET (polyethylene terephthalate) film and dried so that the thickness at the time of drying is 1.5 μm to form a primer layer, and then the primer layer is formed. A coating liquid for a receiving layer having the following composition is applied and dried on a bar coater so that the thickness at the time of drying is 4 μm to form a receiving layer, and the primer layer and the receiving layer are formed on the PET film. A laminated body laminated in order was obtained. Next, the laminate obtained above was bonded onto one surface of a core material paper (OKL Card Oji Paper Co., Ltd.) having a thickness of 390 μm (basis weight 360 g / m ² ). Similarly, on the other side of the core material paper, a laminate in which the primer layer and the receiving layer were laminated in this order was laminated on the PET film. The core paper and the laminate were bonded with a coating liquid for an adhesive layer (thickness 4 μm) having the following composition. As a result, a thermal transfer image receiving sheet provided with a PET film, a primer layer, and a receiving layer on both sides of the core material paper was obtained from the core material paper side.

(Coating liquid for primer layer)
-Polyester resin 4.2 parts (Polyester (registered trademark) WR-905 Nippon Synthetic Chemical Industry Co., Ltd.)
-Titanium oxide 8.4 parts (TCA-888 Sakai Chemical Industry Co., Ltd.)
・ Isopropyl alcohol 10 parts ・ Water 30 parts

(Coating liquid for receiving layer)
・ 10 parts of vinyl chloride-vinyl acetate copolymer (Solvine (registered trademark) C Nissin Chemical Industry Co., Ltd.)
・ Silicone oil 1 part (X-22-3000T Shin-Etsu Chemical Co., Ltd.)
・ 35 parts of toluene ・ 35 parts of methyl ethyl ketone

(Coating liquid for adhesive layer)
・ 30 parts of urethane resin (Takelac (registered trademark) A-969V Mitsui Chemicals, Inc.)
・ 10 parts of isocyanate (Takenate (registered trademark) A-5 Mitsui Chemicals, Inc.)
・ 60 parts of ethyl acetate

[Example 2]
The thermal transfer image receiving sheet according to Example 2 was prepared in the same manner as in Example 1 except that the thickness of the PET film was changed to 50 μm.

[Example 3]
The thermal transfer image receiving sheet according to Example 3 was prepared in the same manner as in Example 1 except that the PET film was changed to a porous PP film having a thickness of 50 μm.

[Comparative Example 1]
A thermal transfer image receiving sheet according to Comparative Example 1 was prepared in the same manner as in Example 1 except that the thickness of the PET film was changed to 4.5 μm.

[Comparative Example 2]
A thermal transfer image receiving sheet according to Comparative Example 2 was prepared in the same manner as in Example 1 except that the PET film was changed to a porous PP film having a thickness of 35 μm.

[Evaluation of thermal transfer image receiving sheet]
With respect to the thermal transfer image receiving sheets according to Examples 1 to 3 and Comparative Examples 1 and 2 above, the warp height of the first edge portion extending in the direction orthogonal to the moving direction (transporting direction) with respect to the heating device was measured. In addition, the thermal transfer image receiving sheets according to Examples 1 to 3 and Comparative Examples 1 and 2 were visually evaluated for white spots in the image after printing was performed by the heating device. The evaluation results are shown below.
[Evaluation criteria]
○: No white spots.
×: White spots occur.

As shown in Table 1 above, in each of the cases where the PET film and the porous PP film are used as the resin layer, if the thickness of these films is made too small, the first edge extending in the direction orthogonal to the transport direction is obtained. The height of the warp of the portion became larger than 75 μm. Further, when the height of the warp of the first edge extending in the direction orthogonal to the transport direction is 75 μm or less, white spots do not occur or slightly occur in the image after printing by the heating device. However, there was no problem in actual use. On the other hand, when the height of the warp of the first edge extending in the direction orthogonal to the transport direction exceeds 75 μm, white spots occur in the image after the printing is performed by the heating device, and the printing quality is poor. became.

Further, when the PET film is used as the resin layer, the warp of the first edge portion extending in the direction orthogonal to the transport direction is higher than that when the porous PP film having the same film thickness is used as the resin layer. Has become smaller (see Example 2 and Example 3). Therefore, it is more preferable to use a PET film as the resin layer in order to reduce the height of the warp of the first edge portion extending in the direction orthogonal to the transport direction.

10, 10a Thermal transfer image receiving sheet 16 1st edge 18 2nd edge 20 Base material 22 Adhesive 24 Resin layer 26 Primer layer 28 Receiving layer 30 Thermal transfer sheet 40 Heating device 42 Platen roller 80 Sheet bundle 90 Blade 92 Edge part

Claims (9)

A method for manufacturing a thermal transfer image receiving sheet in which images are formed on both sides by sublimation transfer.
A process of stacking a plurality of sheet-shaped first thermal transfer image receiving sheets larger than a predetermined shape, and
By punching out a bundle of sheets composed of a plurality of laminated sheet-fed first thermal transfer image receiving sheets with a frame-shaped blade, a first edge portion extending in a direction orthogonal to a transport direction, which is a moving direction with respect to a heating device, and a first edge portion. A step of producing a sheet-fed second thermal transfer image receiving sheet having a predetermined shape and having a second edge extending along the transport direction.
A step of measuring the height of the warp of the first edge portion, which is the height of the first edge portion with respect to a portion 10 mm inside from the first edge portion along the transport direction.
The second thermal transfer image receiving sheet having a warp height of the first edge portion of more than 75 μm is prevented from being used in the step of forming an image by sublimation transfer, and the warp height of the first edge portion is increased. A method for producing a thermal transfer image receiving sheet , comprising a step of selecting the second thermal transfer image receiving sheet having a size of 75 μm or less so as to be used in a step of forming an image by sublimation transfer . The thermal transfer according to claim 1, wherein the second thermal transfer image receiving sheet having a warp height of the first edge portion in the range of 5 μm or more and 75 μm or less is selected for use in a step of forming an image by sublimation transfer. Manufacturing method of image receiving sheet. The method for manufacturing a thermal transfer image receiving sheet according to claim 1 or 2, wherein the second thermal transfer receiving sheet has a substrate and a receiving layer laminated on both sides of the substrate. The method for manufacturing a thermal transfer image receiving sheet according to claim 3, wherein the base material is a laminated body. The method for producing a thermal transfer image receiving sheet according to claim 3 or 4, further comprising a resin layer between the substrate and each receiving layer. The method for manufacturing a thermal transfer image receiving sheet according to claim 5, wherein the resin layer is a polyethylene terephthalate film. The method for manufacturing a thermal transfer image receiving sheet according to any one of claims 1 to 6, wherein the second thermal transfer image receiving sheet has a thickness in the range of 100 μm or more and 1000 μm or less. The method for manufacturing a thermal transfer image receiving sheet according to claim 7, wherein the second thermal transfer image receiving sheet has a thickness of 400 μm or more. Production of a printed matter further comprising a step of forming an image on the receiving layer in the second thermal transfer image receiving sheet produced by the method for producing a thermal transfer image receiving sheet according to any one of claims 3 to 6. Method .

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