JPH08118782A - Transfer sheet and manufacture thereof - Google Patents

Abstract

PURPOSE: To eliminate the blocking even if a release sheet printed with an adhesive layer is superposed as it is before an ink layer is printed, and to prevent a printing failure from occurring due to the adherence of the adhesive layer to the machine plate of the ink layer, even in the case the ink layer is printed by screen printing, or the sheet is elongated, or it is out of register. CONSTITUTION: A transfer sheet 10 is manufacture by printing an adhesive layer 2 of a desired pattern on release sheet 1, then adhering powder to the layer 2, printing layers 5 to 8 on the layer 2, and thereafter coating the layers 5 to 9 with a protective sheet 9 having an adhesive surface which has relatively weak adhesive strength as to adhere the adhesive surface to the layers 5 to 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet for transferring printed characters, patterns, etc. onto a transfer material and a method for producing the transfer sheet.

[0002]

2. Description of the Related Art Conventionally, as one type of such a transfer sheet, a protective sheet, an ink layer forming a pattern of characters, patterns, etc. printed with ink, and a pattern corresponding to the pattern of the ink layer are provided. Eggplant, which is composed of a pressure-sensitive adhesive layer printed with a pressure-sensitive adhesive and a release sheet, and after the release sheet is peeled off and the pressure-sensitive adhesive layer-side surface is pressure-bonded to the transfer material, the protective sheet is peeled off. It is well known that transfer is performed by transferring the ink layer together with the pressure-sensitive adhesive layer to a transfer target material.

As a method for producing a transfer sheet of this type, (a) first, an ink layer is printed on a protective sheet, then an adhesive layer is printed on this ink layer, and then this adhesive is used. A method of covering the layer with a release sheet,
(B) On the contrary, first, the pressure-sensitive adhesive layer is printed on the release sheet, then the ink layer is printed on the pressure-sensitive adhesive layer, and then the pressure-sensitive adhesive surface having a relatively weak pressure-sensitive adhesive force is formed on the ink layer. A method is known in which a protective sheet provided is covered so that the adhesive surface adheres to the ink layer.

[0004]

However, in the above conventional method (a), the ink layer is peeled off from the protective sheet before use, and a product defect such that transfer cannot be performed is likely to occur. There was a problem.

In general, when ink layers and pressure-sensitive adhesive layers are overlaid and printed, the end portions of these layers tend to form slopes that retract toward the inside. Therefore, when transfer is performed with the transfer sheet manufactured by the conventional method (a), the end portions of the pressure-sensitive adhesive layer and the ink layer transferred from the protective sheet to the transfer material are, on the contrary, closer to the upper side (transfer target). There is a problem in that a slope is formed so as to largely project to the outside (the farther it is from the material), and it is easy to get caught.

On the other hand, in the conventional method (b), since the adhesive surface of the protective sheet is adhered to the ink layer,
Even if the ink layer is peeled off from the protective sheet before use, it can be adhered again, and the problem of product failure unlike the conventional method (a) does not occur. Further, when the transfer is performed, the end portions of the pressure-sensitive adhesive layer and the ink layer that are transferred from the protective sheet to the transfer material form a sloped surface that retracts toward the inside (the distance from the transfer material), so that it is less likely to get caught. Become.

However, (a) if the release sheets printed with the pressure-sensitive adhesive layer are piled up before printing the ink layers, blocking occurs, so that the release sheets are piled up with a gap between them due to racking or the like. It is necessary to reduce the work efficiency. (B) When the ink layer is printed by screen printing (silk printing), the pressure-sensitive adhesive layer may expand or contract due to the expansion and contraction of the release sheet due to drying of the pressure-sensitive adhesive layer. There is a problem in that the ink layer adheres to the printing plate and print defects easily occur.

The present invention has been made in view of the above circumstances, and one of the objects of the present invention is to stack release sheets on which an adhesive layer is printed so that they are in contact with each other as they are before the ink layer is printed. Even in the case, it is an object of the present invention to provide a transfer sheet that does not cause blocking and can improve work efficiency extremely, and a method for producing the transfer sheet.

Another object of the present invention is to print the ink layer by screen printing, and even if the release sheet expands or contracts due to the drying of the pressure-sensitive adhesive layer or misregistration occurs, the pressure-sensitive adhesive layer prints the ink layer. It is an object of the present invention to provide a transfer sheet that does not adhere to a plate and cause printing defects, and a method for manufacturing the transfer sheet.

Still another object of the present invention is that, when a transfer is performed, the end portions of the pressure-sensitive adhesive layer and the ink layer, which are transferred from the protective sheet to the material to be transferred, are located inward toward the upper side (the farther from the material to be transferred). It is an object of the present invention to provide a transfer sheet that forms a retractable slope and is less likely to be caught, and a method for manufacturing the transfer sheet.

[0011]

The transfer sheet according to the present invention is such that a pressure-sensitive adhesive layer having a desired pattern is printed on a surface of a release sheet having releasability, and then powder is attached to the pressure-sensitive adhesive layer. Then, an ink layer is printed on the pressure-sensitive adhesive layer, and then, on the ink layer, a protective sheet having a pressure-sensitive adhesive surface having a relatively weak adhesive force is applied so that the pressure-sensitive adhesive surface adheres to the ink layer. It will be covered with.

Further, the transfer sheet manufacturing method according to the present invention comprises a step of printing a pressure-sensitive adhesive layer having a desired pattern on the releasable surface of the release sheet, and a step of attaching powder to the pressure-sensitive adhesive layer. A step of printing an ink layer on the pressure-sensitive adhesive layer to which the powder is adhered, and a protective sheet having a pressure-sensitive adhesive surface having a relatively weak pressure-sensitive adhesive force on the ink layer, wherein the pressure-sensitive adhesive surface is And a step of covering the ink layer in an adhesive manner.

[0013]

In the present invention, after the pressure-sensitive adhesive layer is printed on the release sheet, the powder is attached to the pressure-sensitive adhesive layer before the ink layer is printed. Blocking does not occur even if they are stacked so that they come into contact with each other as they are. For this reason, the working efficiency becomes very good.

Also, when the ink layer is printed by screen printing, even if the release sheet expands or contracts due to drying of the pressure-sensitive adhesive layer, or misregistration occurs, the pressure-sensitive adhesive layer adheres to the printing plate of the ink layer. In addition, printing defects do not occur.

Further, when the transfer is performed, the end portions of the pressure-sensitive adhesive layer and the ink layer which are transferred from the protective sheet to the transfer material are
Since the inclined surface is formed so as to retract inward as it goes upward (away from the material to be transferred), it is less likely to get caught.

Further, if the step of adhering the powder to the pressure-sensitive adhesive layer is carried out by rolling the pressure-sensitive adhesive roller to which the powder has been adhered on the release sheet having the pressure-sensitive adhesive layer printed thereon, The powder can be efficiently adhered to the adhesive layer, and the powder can be adhered mainly from the adhesive roller to only the adhesive layer, and the adhesive layer in the release sheet is not printed. It is possible to reduce the adhesion of the powder to the portion.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. 1 to 8 schematically show the manufacturing process of one embodiment of the present invention. In addition, in order to make the figures easy to understand, in these figures, the thickness of the pressure-sensitive adhesive layer 2, the layer of the powder 3 and the thickness of each of the ink layers 5 to 8 is smaller than that of the release sheet 1 and the protective sheet 9. It is drawn thicker than it actually is. Further, the ends of the pressure-sensitive adhesive layer 2 and the ink layers 5 to 8 are
As described above, in reality, there is a tendency to form a slope, but it is drawn so that such a slope is not formed (that is, a vertical plane is formed).

First, as shown in FIG. 1, a pattern corresponding to a desired character / pattern to be printed later with ink is formed on the surface (upper surface in the drawing) having the releasability (releasability) of the release sheet 1. The pressure-sensitive adhesive layer 2 forming the is printed using a UV-curable pressure-sensitive adhesive. The printing of the pressure-sensitive adhesive layer 2 and the printing of the ink layers 5 to 8 described later can be performed by various printing methods, but the pressure-sensitive adhesive layer 2 and the ink layers 5 to 8 are used.
Screen printing and the like are advantageous in that the thickness can be increased.

Next, after the pressure-sensitive adhesive layer 2 after printing is irradiated with ultraviolet rays to cure the pressure-sensitive adhesive layer 2 so that the pressure-sensitive adhesive layer 2 has an appropriate tackiness, as shown in FIG. The pressure-sensitive adhesive roller 4 having the powder 3 adhered on its surface is rolled on the release sheet 1 having the pressure-sensitive adhesive layer 2 printed thereon. Then, as shown in FIG. 3, the powder 3 is transferred from the adhesive roller 4 to the adhesive layer 2, and the powder 3 is attached to the surface side of the adhesive layer 2.

The adhesive roller 4 is preferably made of a material such as polyurethane having an adhesive property. As the powder 3 in this example, starch having a particle size of 10 to 50 microns was used. The step of attaching the powder 3 by the adhesive roller 4 may be performed by fixing the release sheet 1 and moving the adhesive roller 4, or conversely, fixing the shaft of the adhesive roller 4. The release sheet 1 may be moved, or both may be moved.

Next, as shown in FIGS. 4 to 7, ink layers 5 to 8 are printed in multiple layers. That is, as shown in FIG. 4, first, on the entire surface of the pressure-sensitive adhesive layer 2 to which the powder 3 is attached on the surface side as described above, the final printing of the ink layer is finished well. In order to do so, the ink layer 5 is printed with white ink. At this time, since the powder 3 is made of starch and becomes transparent when it comes into contact with the ink, it does not affect the printing of the ink layer 5 and the finish of the ink layers 6 to 8 thereafter.

Next, as shown in FIG. 5, an ink layer 6 having a pattern corresponding to a desired pattern such as a character or a pattern is printed on a predetermined portion of the ink layer 5 with a colored ink. Then, as shown in FIG. 6, an ink layer 7 having a pattern corresponding to a desired pattern such as a character and a pattern is printed on a predetermined portion of the ink layer 6 and the ink layer 5 with a colored ink of another color. To do. Then, in order to increase the thickness of the entire ink layer, impart gloss to the ink layer, protect the ink layer, and the like, as the uppermost ink layer, as shown in FIG. An ink layer 8 is printed on 7 with a colorless and transparent ink.

As the ink forming the ink layers 5 to 8, various conventionally used inks can be used.

Next, as shown in FIG. 8, a protective sheet having an adhesive surface (lower surface in the figure) having a relatively weak adhesive force is provided on the ink layer 8 and the adhesive surface is the ink layer 8. Cover so that it sticks to. As a result, the transfer sheet 10 is completed. As the protective sheet 9, for example, a transparent plastic film coated on one side (lower surface in the figure) with an adhesive having a slight adhesive force is suitable. In order to facilitate the transfer operation described later, the adhesive strength between the release sheet 1 and the ink layer 8 is F
_1-8 , the adhesive strength between the ink layer 8 and the protective sheet 9 is F
_8-9 , the adhesive strength between the transferred material 11 and the ink layer 5 is F
_If it is set to _5-11 , the relation of F _5-11 > F _8-9 > F _1-8 should be _satisfied .

9 to 11 show steps of a transfer operation using the transfer sheet 10 prepared as described above.
Next, this will be described. First, as shown in FIG. 9, the release sheet 1 is peeled from the transfer sheet 10 and removed.

Next, as shown in FIG. 10, the surface of the transfer sheet 10 on the side of the ink layers 5 to 8 is pressure-bonded to the surface of the transfer material 11.
Then, the protective sheet 9 is peeled off. Then, as shown in FIG. 11, the ink layers 5 to 8 move together with the adhesive layer 2 toward the transferred material 11, and the transfer is completed.

In this transfer sheet 10 and its manufacturing method, after the pressure-sensitive adhesive layer 2 is printed on the release sheet 1, the powder 3 is attached to the pressure-sensitive adhesive layer 2 before printing the ink layers 5-8. Blocking does not occur even if the release sheet 1 on which the pressure-sensitive adhesive layer 2 is printed is stacked so as to be in contact with each other as it is before printing the ink layers 5 to 8. For this reason, the working efficiency becomes very good.

Also, when the ink layers 5 to 8 are printed by screen printing, even if the release sheet 1 expands or contracts due to the drying of the pressure-sensitive adhesive layer 2 or misregistration occurs, the pressure-sensitive adhesive layer 2 is changed to the ink layers 5 to 8. No sticking to the printing plate of No. 8 causes printing failure.

When the transfer is performed, the pressure-sensitive adhesive layer 2 and the ink layer 5 transferred from the protective sheet 9 to the material 11 to be transferred.
Since the end portions of 8 to 8 form slopes that retract toward the inside (the more away from the transferred material 11), they are less likely to be caught.

Further, as in the present embodiment, the step of adhering the powder 3 to the adhesive layer 2 is carried out by applying the powder 3 onto the release sheet 1 on which the adhesive layer 2 is printed. By rolling, the powder 3 can be efficiently attached to the pressure-sensitive adhesive layer 2, and at the same time the powder 3 can be mainly attached only to the pressure-sensitive adhesive layer 2.
It is possible to reduce the adhesion of the powder 3 to a portion of the adhesive layer 2 which is not printed. If the amount of the powder 3 attached to the portion of the release sheet 1 on which the pressure-sensitive adhesive layer 2 is not printed is large, the powder 3 attached to the protective sheet 9 is covered when the ink layer 8 is covered with the protective sheet 9. Since it adheres to the adhesive surface, there is no particular problem. Even if the pressure-sensitive adhesive roller 4 rolls on the release sheet 1, if the amount of the powder 3 attached to the portion of the release sheet 1 on which the pressure-sensitive adhesive layer 2 is not printed increases, the powder 3 By rolling another pressure-sensitive adhesive roller on which the pressure-sensitive adhesive layer 2 is not adhered onto the release sheet 1 and by adhering the powder 3 adhered to the part of the release-sheet 1 on which the pressure-sensitive adhesive layer 2 is not printed to the pressure-sensitive adhesive roller. , May be removed.

In this embodiment, starch is used as the powder 3, but in the present invention, the powder 3 is used for printing the ink layers 5 to 8, the release sheet 1 and the transfer material 1.
Any powder 3 may be used as long as it does not adversely affect the adhesion of the pressure-sensitive adhesive layer 2 to 1. However, if starch is used as in this example, it becomes transparent when it comes into contact with ink as described above, so that it does not affect the finish of printing of the ink layer and adversely affects the health of the printing operator. There is no risk of causing

Further, in this embodiment, an ultraviolet-curable adhesive is used as the adhesive, but in the present invention, an adhesive other than the ultraviolet-curable adhesive may be used. However, when another type of adhesive is used, it takes a long time to dry the adhesive layer after printing, which tends to cause shrinkage of the release sheet 1 and eventually print misalignment. By using the UV-curable pressure-sensitive adhesive, the pressure-sensitive adhesive layer can be cured in a short time, so that the release sheet 1 can be prevented from shrinking, and print misalignment caused thereby can be prevented.

Further, although the ink layer is formed by multicolor printing in this embodiment, the ink layer may be formed by single color printing in the present invention. Further, although the ink layer is a multi-layer in this embodiment, the ink layer may be a single layer in the present invention.

[0034]

As described above, according to the transfer sheet and the method for producing the same according to the present invention, (a) the release sheet having the adhesive layer printed thereon may be stacked so as to be in contact with each other as it is before the ink layer is printed, Does not cause blocking. For this reason, the work efficiency is very good. (B) Even when the ink layer is printed by screen printing, even if the release sheet expands or contracts due to the drying of the adhesive layer or misregistration occurs, (C) When the transfer is performed, the end portions of the pressure-sensitive adhesive layer and the ink layer transferred from the protective sheet to the transfer target material are closer to the upper side ( Since it forms a slope that retracts inward (away from the transferred material), it is less likely to get caught.
It is possible to obtain excellent effects such as.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which an adhesive layer 2 is printed on a release sheet 1 in an example of the present invention.

FIG. 2 is a cross-sectional view showing a state in which an adhesive roller 4 to which powder 3 is attached is applied to a release sheet 1 on which an adhesive layer 2 is printed in the above embodiment.

FIG. 3 is a cross-sectional view showing a state in which powder 3 is attached to the surface side of the pressure-sensitive adhesive layer 2 in the above example.

FIG. 4 is a cross-sectional view showing a state in which a first ink layer 5 is printed on the pressure-sensitive adhesive layer 2 to which the powder 3 is attached in the above-mentioned embodiment.

FIG. 5 is a cross-sectional view showing a state in which a second ink layer 6 is printed in the above embodiment.

FIG. 6 is a cross-sectional view showing a state in which a third ink layer 7 is printed in the above embodiment.

FIG. 7 is a cross-sectional view showing a state in which a fourth ink layer 8 is printed in the example.

FIG. 8 is a completed transfer sheet 10 in the above-described embodiment.
FIG.

FIG. 9 is a cross-sectional view showing a state where the release sheet 1 is removed from the transfer sheet 10.

FIG. 10 is the transfer sheet 10 from which the release sheet 1 is removed.
FIG. 3 is a cross-sectional view showing a state in which is bonded to the transfer material 11.

FIG. 11 is a cross-sectional view showing a state where transfer by the transfer sheet 10 is completed.

[Explanation of symbols]

 1 Release Sheet 2 Adhesive Layer 3 Powder 4 Adhesive Rollers 5-8 Ink Layer 9 Protective Sheet 10 Transfer Sheet

Claims (4)

[Claims] 1. A pressure-sensitive adhesive layer having a desired pattern is printed on the release surface of a release sheet, and then powder is attached to the pressure-sensitive adhesive layer, and then an ink layer is formed on the pressure-sensitive adhesive layer. A transfer sheet obtained by printing, and then covering the ink layer with a protective sheet having an adhesive surface having a relatively weak adhesive force such that the adhesive surface adheres to the ink layer. 2. The powder is attached to the pressure-sensitive adhesive layer by rolling the pressure-sensitive adhesive roller to which the powder is attached on the release sheet on which the pressure-sensitive adhesive layer is printed. Item 1. The transfer sheet according to item 1. 3. A step of printing a pressure-sensitive adhesive layer having a desired pattern on a release surface of a release sheet, a step of attaching powder to the pressure-sensitive adhesive layer, and the pressure-sensitive adhesive to which the powder is attached. A step of printing an ink layer on the agent layer; and a step of covering the ink layer with a protective sheet having an adhesive surface having a relatively weak adhesive force so that the adhesive surface adheres to the ink layer. A method for manufacturing a transfer sheet including: 4. The step of adhering the powder to the pressure-sensitive adhesive layer is performed by rolling the pressure-sensitive adhesive roller to which the powder is attached, on the release sheet on which the pressure-sensitive adhesive layer is printed. 4. The method for producing a transfer sheet according to item 3.