JP2021041593A - Thermal transfer image receiving sheet, roll of thermal transfer image receiving sheet and thermal transfer printing device - Google Patents

Abstract

To remove paper powder or dust adhered onto a roller to prevent a printing quality from deteriorating.SOLUTION: A thermal transfer image receiving sheet includes: a reception layer on one side of a base material; and an adhesive layer with an adhesive face exposed partially in a longer direction. The adhesive layer may be provided on both sides. An adhesive force of the adhesive layer is 0.02 N/25 mm to 1.0 N/25 mm. An detection mark may be provided at a boundary part of the adhesive layer. The adhesive layer may be provided at a wound core side in a roll of a thermal transfer image receiving sheet composed of a wound body of the thermal transfer image receiving sheet.SELECTED DRAWING: Figure 1

Description

The present invention relates to a thermal transfer image receiving sheet, a roll of a thermal transfer image receiving sheet, and a thermal transfer printing apparatus.

The thermal transfer printing device brings the color material surface of the thermal transfer sheet into contact with the image receiving sheet, heats the image with the thermal head pressed against the back side of the thermal transfer sheet, transfers the color material of the thermal transfer sheet to the image receiving sheet, and prints an image. It is a thing.

The thermal transfer printing apparatus is provided with a large number of rollers for transporting the image receiving sheet. When the printing process is repeated, paper dust generated from the image receiving sheet, dust caused by the device installation environment, and the like adhere to these rollers. When paper dust or dust moves from the roller to the image receiving sheet, there is a problem that the printing quality is deteriorated.

Japanese Unexamined Patent Publication No. 8-48433

An object of the present invention is to provide a heat transfer image receiving sheet, a roll of the heat transfer image receiving sheet, and a heat transfer printing device capable of removing paper dust and dust adhering to a roller.

The heat transfer image receiving sheet of the present invention is a heat transfer image receiving sheet in which a receiving layer is provided on one surface of a base material, and an adhesive layer having an exposed adhesive surface is provided in a part in the longitudinal direction.

In one aspect of the present invention, the adhesive layer is provided on both sides.

In one aspect of the present invention, the adhesive strength of the adhesive layer is 0.02 N / 25 mm or more and 1.0 N / 25 mm or less.

In one aspect of the present invention, a detection mark is provided at the boundary portion of the adhesive layer.

The roll of the heat transfer image receiving sheet of the present invention is a roll of the heat transfer image receiving sheet made of a wound body of the heat transfer image receiving sheet of the present invention, and the adhesive layer is provided on the winding core side.

The thermal transfer printing apparatus of the present invention heats a plurality of rollers for conveying the thermal transfer image sheet of the present invention and the thermal transfer sheet, and transfers a coloring material from the thermal transfer sheet to the receiving layer of the thermal transfer image sheet to form an image. A photographic image portion to be printed, a cutter that cuts the thermal transfer image receiving sheet in the lateral direction and cuts out a printing object containing the image, a margin piece from the thermal transfer image receiving sheet, and a collection container for collecting the margin piece. The adhesive layer is cut to a predetermined width by the cutter and collected in the collection container.

According to the present invention, it is possible to remove paper dust and dust adhering to the rollers and prevent deterioration of printing quality.

It is a schematic block diagram of a thermal transfer printing apparatus. 2A and 2B are plan views of the thermal transfer image receiving sheet. 3A and 3B are plan views of the thermal transfer image receiving sheet. 4A and 4B are plan views of the image receiving paper according to another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the thermal transfer printing apparatus 1 is set with a roll paper 2 in which a long thermal transfer image receiving sheet W (hereinafter, referred to as an image receiving sheet W) is wound in a roll shape. The image receiving sheet W drawn out from the paper 2 is continuously conveyed to the thermal head 4 via the pair of grip rollers 3. The image receiving sheet W has a base sheet and a receiving layer provided on one surface of the base sheet. Conventionally known materials can be used for the base sheet and the receiving layer.

The image receiving sheet W conveyed to the thermal head 4 is sandwiched between the thermal head 4 and the platen roller 7 arranged at a position facing the thermal head 4 so as to be sandwiched between the image receiving sheet W supplied from the supply unit 5. Guided between them, the image receiving sheet W and the thermal transfer sheet S are pressure-welded. Conventionally known heat transfer sheets S can be used.

When the thermal head 4 applies thermal energy according to the printing information to the thermal transfer sheet S while the image receiving sheet W and the thermal transfer sheet S are in pressure contact with each other, the color material in the thermal transfer sheet S is transferred to the image receiving sheet W side. The image is formed. After that, the pressure welding by the platen roller 7 is released, and the printing operation is completed.

In the above-mentioned printing operation, a full-color image can be printed by repeating the printing operation of each color by the thermal transfer sheet S provided with a plurality of color material layers in a surface sequence. For example, as the color material layer, a thermal transfer sheet S having yellow, magenta, and cyan color material layers in a surface-sequential manner can be used. Further, as the thermal transfer sheet S, not only the above-mentioned three-color color material layer but also a special color layer and a protective layer are used, and if desired, a wider variety of printing is applied or printed on the image receiving sheet. A protective layer can be provided on the image.

The used thermal transfer sheet S is wound up by the winding unit 6 and collected.

The image receiving sheet W on which a desired image is printed by a printing unit including a thermal head 4 and a platen roller 7 is conveyed by a plurality of rollers such as a guide roller 9 and a conveying roller 10, and has a predetermined size (for example, by a cutter 11). It is cut into a user-specified size such as L size or 2L size) and discharged to the tray 13 as a printed matter 12.

The size of the image formed by the printing unit on the image receiving sheet W may be made larger than that of the printing object 12, and margin areas may be provided on the front side and the rear side of the image. This margin area is provided in order to produce the printed matter 12 having no margin and to prevent the image to be formed on the printed matter 12 from being cut. The cutter 11 cuts the image receiving sheet W in the lateral direction at a position where a predetermined margin is left with respect to the front edge of the image formed on the image receiving sheet W. Further, the cutter 11 cuts the image receiving sheet W at a position where a predetermined margin is left with respect to the rear edge of the image. The cut-off margin area is housed in a collection container (not shown) in the apparatus as an unnecessary margin piece.

Next, the image receiving sheet W will be described. As shown in FIGS. 2A and 2B, the image receiving sheet W is provided with an adhesive layer AL having an exposed adhesive surface at least in a part in the longitudinal direction. FIG. 2A shows an example in which the adhesive layer AL is provided on the winding core side, and FIG. 2B shows an example in which the adhesive layer AL is provided in the middle portion in the longitudinal direction. The workability when setting the roll paper 2 in the apparatus is better when the adhesive layer AL is provided on the winding core side or the intermediate portion than when it is provided on the outer side of the winding. The adhesive layer AL may be provided only on one surface of the image receiving sheet W, or may be provided on both sides.

2A and 2B show an example in which the adhesive layer AL is continuously provided over the entire width direction (short direction) of the image receiving sheet W, but the adhesive layer AL is 20% or more of the width of the image receiving sheet W. It suffices if it is provided. Further, the adhesive layers AL may be continuously provided in the width direction, or may be provided at intervals.

When the adhesive layer AL of the image receiving sheet W passes through the transfer path of the thermal transfer printing device 1, paper dust and dust adhering to the surfaces of a plurality of rollers such as the grip roller 3, the platen roller 7, the guide roller 9, and the transfer roller 10. Etc. are removed by the adhesive layer AL. As a result, it is possible to prevent paper dust, dust, etc. from moving from the roller to the printing area of the image receiving sheet W, and to prevent deterioration of the printing quality.

The adhesive layer AL may be formed by applying an adhesive on the receiving layer or the back surface of the image receiving sheet W, or an adhesive sheet having the adhesive applied on one side or both sides of another base material may be applied to the image receiving sheet W. It may be connected. A double-sided adhesive sheet may be attached on the receiving layer or the back surface of the image receiving sheet W to form the adhesive layer AL. Further, the image receiving sheet W has a release portion in which a receiving layer, a base material and an adhesive layer are laminated, and a release sheet in which the release surface is detachably bonded to the adhesive layer of the release portion. The seal type thermal transfer image receiving sheet may be used, and the portion where the adhesive layer is exposed by removing a part of the receiving layer and the base material layer may be used as the adhesive layer AL for removing paper dust, dust and the like.

As the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer AL, an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, or the like can be used.

The adhesive strength of the adhesive layer AL is preferably about 0.02 N / 25 mm or more and 1.0 N / 25 mm. By setting the adhesive strength to 0.02 N / 25 mm or more, it becomes easy to remove paper dust and dust on the roller surface. By setting the adhesive strength to 1.0 N / 25 mm or less, the image receiving sheet W is smoothly conveyed in the apparatus.

As shown in FIGS. 3A and 3B, the detection mark D may be provided at a boundary portion such as the front end or the rear end of the adhesive layer AL. By detecting the detection mark D by a sensor (not shown) provided in the thermal transfer printing device 1, the position of the adhesive layer AL can be confirmed and printing on the adhesive layer AL can be prevented. The portion of the roll paper 2 that is located on the outside or inside of the adhesive layer AL and is in contact with the adhesive layer AL may not be used for printing.

The length of the adhesive layer AL in the longitudinal direction of the image receiving sheet W is preferably the circumference of the transport roller or more, and is, for example, about 3 cm or more and 30 cm or less. The adhesive layer AL portion may be cut with a cutter 11 and discharged to the same tray 13 as the printed matter 12, or may be cut into small pieces with a width of about 4 mm and collected in a margin piece collection container. In particular, when the adhesive layer AL is provided in the middle of the image receiving sheet W as shown in FIG. 2B, it is preferable to cut the adhesive layer AL portion into small pieces and collect the margin pieces in the collection container. A dedicated collection container may be provided separately from the margin piece collection container.

In FIGS. 2A, 2B, 3A, and 3B, the adhesive layer AL is a solid pattern, but it may be a repeating pattern of fine lines or figures. The adhesive layer AL may be provided at only one place on the image receiving sheet W, or may be provided at a plurality of places at intervals in the longitudinal direction. The adhesive layer AL is preferably contained in 50% or less of the entire image receiving sheet W.

Although the roll paper type image receiving paper has been described in the above embodiment, as shown in FIG. 4A, the adhesive layer AL may be provided at the end of the sheet-fed type image receiving paper W1. It is preferable to provide a perforation M at the boundary between the adhesive layer AL and the image forming region G so that the adhesive layer AL can be easily separated. An image may be formed larger than the perforation M so that the image is formed on the entire surface of the image forming region G. Therefore, it is preferable that a predetermined interval is provided between the adhesive layer AL and the perforation M. As shown in FIG. 4B, the adhesive layer AL may be provided at both ends of the image receiving paper W1.

Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to the following Examples as long as the gist of the present invention is not exceeded.

(Example 1)
Acrylic adhesive (manufactured by Fujikura Kasei Co., Ltd., LKG-1101) and polyisocyanate curing agent (manufactured by Tosoh Co., Ltd., Coronate L) are applied to one side of commercially available coated paper, and the adhesive strength is 0.3 N / 25 mm. A pressure-sensitive adhesive sheet having a thickness of 250 μm was prepared.

The adhesive strength was measured by the following method. First, the SUS plate was fixed to a precision universal testing machine (AGS-100B manufactured by Shimadzu Corporation), and the adhesive surface of the adhesive sheet cut to a width of 1 inch and a length of 150 mm was adhered to the SUS plate and left for 1 minute. .. Then, the adhesive sheet was peeled off by 90 ° under the conditions of TEST SPEED 300 mm / M, CHART SPEED 100 mm / M, and a distance of 120 mm, and the adhesive strength was measured. The measurement environment was a temperature of 25 ° C. and a humidity of 50%.

This adhesive sheet 30 cm was connected to the core of an image receiving sheet (sublimation printer DS620 (image receiving sheet dedicated to Dai Nippon Printing Co., Ltd.)) and rolled into a roll to form roll paper.

(Example 2)
The roll paper of Example 2 was produced in the same manner as in Example 1 except that a black detection mark was provided at the joint portion of the adhesive sheet.

(Example 3)
Acrylic adhesive (Fujikura Kasei Co., Ltd., LKG-1101) and polyisocyanate curing agent (Tosoh Co., Ltd., Coronate L) and acrylic resin (Mitsubishi Chemical Co., Ltd., Dianal BR-) Using a coating liquid obtained by mixing 87) with a solid content ratio of 1: 5, the roll paper of Example 3 was prepared in the same manner as in Example 1 except that the adhesive strength of the adhesive sheet was 0.03 N / 25 mm. Made.

(Example 4)
Using an acrylic pressure-sensitive adhesive (SK Dyne 1499M, manufactured by Soken Kagaku Co., Ltd.) and a polyisocyanate curing agent (Coronate L, manufactured by Tosoh Co., Ltd.) as the pressure-sensitive adhesive, the adhesive strength of the pressure-sensitive adhesive sheet was 0.7 N / 25 mm. A roll paper of Example 3 was produced in the same manner as in Example 1 except for the above.

(Example 5)
The roll paper of Example 5 was produced in the same manner as in Example 1 except that the pressure-sensitive adhesive was applied to both sides of the coated paper and the thickness of the pressure-sensitive adhesive sheet was set to 260 μm.

(Comparative Example 1)
The roll paper of Comparative Example 1 was produced in the same manner as in Example 1 except that the adhesive sheet was not used.

(Reference example 1)
Acrylic adhesive (Fujikura Kasei Co., Ltd., LKG-1101) and polyisocyanate curing agent (Tosoh Co., Ltd., Coronate L) and acrylic resin (Mitsubishi Chemical Co., Ltd., Dianal BR-) Using a coating liquid obtained by mixing 87) with a solid content ratio of 1:20, the roll paper of Reference Example 1 was prepared in the same manner as in Example 1 except that the adhesive strength of the adhesive sheet was 0.01 N / 25 mm. Made.

(Reference example 2)
Using an acrylic pressure-sensitive adhesive (SK Dyne 1439U, manufactured by Soken Kagaku Co., Ltd.) and a polyisocyanate curing agent (Coronate L, manufactured by Tosoh Co., Ltd.) as the pressure-sensitive adhesive, the adhesive strength of the pressure-sensitive adhesive sheet was set to 1.1 N / 25 mm. A roll paper of Reference Example 2 was produced in the same manner as in Example 1 except for the above.

The prepared roll papers of Examples, Comparative Examples, and Reference Examples were set in a thermal transfer printing device (manufactured by Dai Nippon Printing Co., Ltd., DS620) in which paper dust was attached to a transfer roller, and the image receiving sheet was conveyed. The cleanability, transportability, and printing position accuracy were evaluated as criteria. The results are shown in Table 1.

(Evaluation criteria for cleanability)
◯: Paper dust adhering to the transport roller was removed ×: Paper dust adhering to the transport roller was not removed-: The effect could not be confirmed due to poor transport.

(Evaluation criteria for transportability)
◯: It was confirmed that the image receiving sheet was transported without any problem in normal operation. ×: The adhesive strength was strong and a transport error occurred in the device.

(Evaluation criteria for printing position accuracy)
⊚: The adhesive area (adhesive sheet) could be easily identified by detecting the detection mark. ○: The adhesive area could be identified by managing the amount of the image receiving sheet transported from the time when the roll paper was set. However, if there is a discrepancy between the amount of image-receiving sheet conveyed by the device and the actual amount of image received due to the use of short paper or irregular work, a transfer error due to erroneous printing on the adhesive area will occur. did

1 Thermal transfer printing device 2 Roll paper 3 Grip roller 4 Thermal head 5 Supply section 6 Winding section 7 Platen roller 9 Guide roller 10 Conveying roller 11 Cutter 12 Printing 13 Tray W Printing paper S Thermal transfer sheet AL Adhesive layer

Claims (6)

A thermal transfer image receiving sheet in which a receiving layer is provided on one surface of a base material.
A thermal transfer image receiving sheet characterized in that an adhesive layer having an exposed adhesive surface is provided in a part in the longitudinal direction. The thermal transfer image receiving sheet according to claim 1, wherein the adhesive layer is provided on both sides. The thermal transfer image receiving sheet according to claim 1 or 2, wherein the adhesive strength of the adhesive layer is 0.02 N / 25 mm or more and 1.0 N / 25 mm or less. The thermal transfer image receiving sheet according to any one of claims 1 to 3, wherein a detection mark is provided at a boundary portion of the adhesive layer. A roll of a heat transfer image receiving sheet comprising a wound body of the heat transfer image receiving sheet according to any one of claims 1 to 4.
A roll of a heat transfer image receiving sheet, wherein the adhesive layer is provided on the winding core side. A plurality of rollers for conveying the thermal transfer image receiving sheet according to any one of claims 1 to 4, and a plurality of rollers.
A printing portion that heats the thermal transfer sheet and transfers a color material from the thermal transfer sheet to the receiving layer of the thermal transfer image receiving sheet to form an image.
A cutter that cuts the heat transfer image receiving sheet in the lateral direction and cuts out a printed matter containing the image and a margin piece from the heat transfer image receiving sheet.
A collection container for collecting the margin piece and
With
A thermal transfer printing apparatus, wherein the adhesive layer is cut to a predetermined width by the cutter and collected in the collection container.

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