JPH06298441A - Method for transferring layer of pressure sensitive adhesive - Google Patents

Abstract

PURPOSE:To readily, efficiently and continuously transfer a pressure sensitive adhesive in a fixed shape by installing a transfer sheet in position on a subject to which the adhesive is applied where the adhesive is opposite to the subject to which it is applied, and then pressing the transfer sheet, which comprises a layer of pressure sensitive adhesive provided on the surface of a support the surface adhesive strength of which is at or less than a specific value. CONSTITUTION:A transfer sheet 1 comprises a layer 11 of pressure sensitive adhesive provided on the surface of a support 10 whose surface adhesive strength is 1000g/50mm or less. The transfer sheet 1 is conveyed from a transfer-sheet roll 2 by driving of a winding drive portion 4 and a support winding roll 5 in such a manner that a subject 6 to which the adhesive is applied is opposite to the layer 11 of pressure sensitive adhesive. The sheet 1 is temporarily stopped each time a predetermined distance at which the sheet 1 is opposite to a pressing member 3 is reached. With the temporary stop of the transfer sheet 1, the pressing member 3 is lowered so that the transfer sheet 1 is pressed onto the subject 6 to which the adhesive is applied. After the pressing is finished the pressing member 3 rises, and the layer 11 of pressure sensitive adhesive, so shaped to correspond to the form of the end of the pressing member 3, is peeled from the support 10 and transferred onto the subject 6 to which it is applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive layer transfer method, and an object thereof is to transfer a pressure-sensitive adhesive layer of a certain shape onto a predetermined adherend one after another easily and efficiently. It is in the provision of methods.

[0002]

2. Description of the Related Art Conventionally, as a method of joining two materials, a method of using a liquid adhesive such as a solvent solution type or an emulsion type, and a pressure sensitive adhesive tape or pressure sensitive adhesive sheet which exhibits an adhesive force by pressurization. There is a method using a pressure sensitive adhesive. However, in the method using a liquid adhesive, there is a problem that it takes time to cure the adhesive, or the adhesive is flammable, irritating and toxic in many cases and easily causes environmental pollution. Therefore, there was a tendency to refrain from using it. On the other hand, in the method using the pressure-sensitive adhesive, the adhesive force is developed at the same time as the pressurization,
In addition, since it does not cause environmental pollution, it has become a widely used method in recent joining methods. As a method of transferring and pasting such a pressure-sensitive adhesive in a fixed shape onto an adherend, a pressure-sensitive adhesive is punched out using a mold of a predetermined shape, and each of the pressure-sensitive adhesives is handled by hand. A method of mechanically transferring by work or by using a press, a roll or the like has been conventionally adopted.

[0003]

However, in the transfer work using the above-mentioned mold, since adhesive glue builds up in the mold, maintenance work is required every time the mold is used, There was a problem that the work efficiency was very poor and the adhesive could not be transferred efficiently at a short pitch. Moreover, in order to change the shape of the pressure-sensitive adhesive to be transferred, it is necessary to change the mold, which poses a problem that it is a very large-scale work. Also,
In this die-cutting process, the adhesive cannot be transferred in a very fine shape, and in such a case, there is a problem in that it requires resorting to manual work and requires a lot of labor. did. Therefore, in the industry, the adhesive has a fixed shape,
There has been a demand for the creation of a method that enables simple and efficient transfer of inks one after another.

[0004]

According to the present invention, a pressure-sensitive adhesive layer is provided on the surface of a support having a surface adhesive force of 1000 g / 50 mm or less to form a transfer sheet, and the transfer sheet is applied to an adherend. The pressure-sensitive adhesive layer is characterized in that after the pressure-sensitive adhesive and the adherend are installed at predetermined positions, the transfer sheet is pressed from the support side toward the adherend by a pressing member having a constant shape. By providing a transfer method, the above-mentioned conventional problems are solved.

[0005]

DETAILED DESCRIPTION OF THE INVENTION The pressure-sensitive adhesive layer transfer method according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a transfer sheet (1) used in the present invention. As shown, in the present invention, the surface adhesive force is 1000 g / 50.
The pressure-sensitive adhesive layer (1
1) is provided to form a transfer sheet (1).

The support (10) is not particularly limited, and papers such as Japanese paper, kraft paper and crepe paper, cloths such as cotton, staple fabric, synthetic fiber and non-woven fabric, cellophane, polyester,
Polyolefins such as vinyl chloride, polyethylene, polypropylene, plastics such as Teflon, urethane,
Foams such as polyethylene and other well-known supports such as composite materials are preferably used, but the surface adhesive force is 1000.
g / 50 mm or less. The reason for this is that the support (1
0) If the adhesive strength of the surface exceeds 1000 g / 50 mm,
The adhesive force between the pressure-sensitive adhesive layer (11) and the support (10) is large, and the pressure-sensitive adhesive layer (1) to the adherend by a pressing member described later is used.
This is because the transfer of 1) cannot be performed efficiently, which is not preferable. Thus, 1000 g on the surface of the support (10)
As a means for expressing an adhesive force of / 50 mm or less, a means for forming the support (10) itself from a material having such an adhesive force, a means for providing a release treatment layer on the surface of the support (10), and the like, Any appropriate means can be adopted without any particular limitation. The release treatment layer is not particularly limited, and is subjected to a silicon treatment through a polyethylene laminate layer, or a vinyl ester / maleic acid ester copolymer directly on the surface of plastics, a partial higher fatty acid ester of polyvinyl alcohol, etc. Known treatments such as applying the treatment agent can be preferably used. The pressure-sensitive adhesive layer (11) used in the transfer sheet (1) is not particularly limited, and rubber-based pressure-sensitive adhesives such as natural rubber and synthetic rubber, acrylic pressure-sensitive adhesives, vinyl-based pressure-sensitive adhesives, silicon-based pressure-sensitive adhesives,
Known pressure-sensitive adhesives such as urethane-based pressure-sensitive adhesives can be preferably used, but the elongation of the pressure-sensitive adhesive layer (11) used is 10 in order to make transfer to an adherend described later favorable. It is desirable to be set to ˜1000%. Further, the thickness of the support (10) and the pressure-sensitive adhesive layer (11) used in the transfer sheet (1) is not particularly limited, but the thickness of the support (10) is 0.01 in order to perform good transfer.
It is desirable that the thickness is about 2 mm.

Using the transfer sheet (1) as described above,
The pressure-sensitive adhesive layer (11) is transferred onto a predetermined adherend. Figure 2
7 to 7 are explanatory views showing a first embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention. In the figure, (2) is a transfer sheet roll around which the transfer sheet (1) is wound, (3) is a pressing member such as a press, (4) is a take-up drive unit, (5) is a support take-up roll, ( 6) is an adherend, and (7) is an adherend fixing table on which the adherend (6) is placed.

In the illustrated embodiment, the transfer sheet (1) is transferred from the transfer sheet roll (2) to the adherend (6) by driving the winding drive unit (4) and the support winding roll (5). The adhesive layer (11) is conveyed so as to face it. The conveyance of the transfer sheet (1) is controlled by a control mechanism (not shown), and is temporarily stopped for each predetermined distance unit facing the pressing member (3). This transfer sheet (1)
The pressing member (3) is lowered as shown in FIG. 2 in conjunction with the temporary stop of the transfer sheet (1), and the transfer sheet (1) is pressed onto the adherend (6) (see FIG. 3). After the pressing is completed, the pressing member (3) rises as shown in FIG. 4, and an adhesive layer (11) having a shape corresponding to the tip shape of the pressing member (3) is provided on the adherend (6) as a support. It is peeled off and transferred from (10). After the transfer of the pressure-sensitive adhesive layer (11) is finished, the transfer sheet (1) is again conveyed as shown in FIG. 5, and at the same time, the adherend fixing table (7) is also conveyed in the same direction as the transfer sheet (1). It The transfer mechanism of the transfer sheet (1) and the adherend (6) is temporarily stopped at a predetermined distance by a control mechanism (not shown). Then, as shown in FIG. 6, similarly to the above, the pressing member (3) descends, the transfer sheet (1) is pressed onto the adherend (6), and the adherend (11) of the adhesive layer (11) is pressed. 6) Transfer to the top is performed. Such a series of steps of carrying the transfer sheet (1), temporarily stopping, lowering the pressing member (3), raising the pressing member (3), and carrying the transfer sheet (1) and the adherend fixing table (7). Is repeatedly performed, and the pressure-sensitive adhesive layer (11) of the transfer sheet (1) is peeled off from the support (10) one after another in a fixed shape, and transferred onto the adherend (6). The present invention is not limited to the above embodiment, and the transfer sheet (1) may be conveyed arbitrarily, and the adherend (6) is also conveyed in the conveying direction after the pressing is completed. The transfer sheet (1) does not have to be in the same direction as the conveyance.

Next, a second embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention will be described with reference to FIGS. In this second embodiment, the transfer sheet (1) and the adherend (6)
The adherend fixing table (7) on which is mounted is fixed at a fixed position, and the pressing member (3) moves on the transfer sheet (1). The pressing member (3) is the transfer sheet (1)
It moves up and pauses at every predetermined distance controlled in advance by a control mechanism (not shown), descends as shown in FIG. 8, and then attaches the transfer sheet (1) as shown in FIG. Press onto the body (6) to transfer the adhesive layer (11). After the pressing is completed, as shown in FIG. 10, the pressing member (3) moves up and moves a predetermined distance, then temporarily stops, and similarly presses the transfer sheet (1). By repeating this step, the adhesive layer (11) having a predetermined shape is transferred onto the adherend (6).

According to the present invention, by adopting the method as described above, it becomes possible to successively transfer the pressure-sensitive adhesive layer having a constant shape onto a predetermined adherend. Since the shape of the pressure-sensitive adhesive layer to be transferred is set by the shape of the tip of the pressing member, it is possible to transfer the pressure-sensitive adhesive layer such as a fine shape by appropriately changing the shape of the tip of the pressing member. it can. Further, the support (10) for the transfer sheet (1)
Is formed of a very flexible material such as low-density polyethylene or soft vinyl chloride, the pressure-sensitive adhesive layers can be transferred one after another in a triangular shape, a round shape, or the like.

[0011]

EXAMPLES Examples of the pressure-sensitive adhesive layer transfer method according to the present invention will be given below to explain this method in more detail. However, the present invention is not limited to the following embodiments. (Example 1) A polyester film having a surface subjected to a release treatment with a silicone resin (thickness: 50 μm, surface adhesive strength: 100)
elongation of about 400% on a support made of g / 50 mm)
A methacryl acryl alkyl ester-based pressure-sensitive adhesive layer adjusted to have a thickness of about 30 μm was provided as a transfer sheet. This transfer sheet was produced in a roll shape having a width of 10 mm and wound around a sheet roll. A substrate for the purpose of temporarily fixing the flat package was used as an adherend and was placed on a predetermined stage. A transfer sheet is placed on the adherend by rolling it out so that the adherend and the adhesive layer face each other, and the transfer sheet is pressed by a press having a pressing area of 12 mm in the sheet width direction and 10 mm in the sheet flow direction. Was pressed onto the adherend to form a pressure-sensitive adhesive layer having a size of 10 mm × 10 mm on the substrate surface for the purpose of temporarily fixing the flat package. Further, after the stage fixing the adherend was moved in the X-Y axis directions and the transfer sheet was further fed out by 10 mm from the sheet roll, pressing was performed by the same press as described above. By repeating this process, several 10 mm × 10 mm pressure-sensitive adhesive layers for the purpose of temporary fixing were formed. In addition, the adhesive layer can be formed with an accuracy of 0.1 to 0.2 mm or less by including a cutting step for sealing the adhesive layer at a position immediately adjacent to the pressing member, which requires dimensional accuracy. It was confirmed to be effective for various applications.

[0012]

As described in detail above, according to the present invention, a transfer sheet is formed by providing a pressure-sensitive adhesive layer on the surface of a support having a surface adhesive force of 1000 g / 50 mm or less, and the transfer sheet is applied to an adherend. After the pressure-sensitive adhesive and the adherend are installed at a predetermined position at a position where the pressure-sensitive adhesive and the adherend are opposed to each other, the transfer sheet is pressed from the support side toward the adherend by a pressing member having a constant shape. Since it is a layer transfer method, as is apparent from the above-described examples, it has an excellent effect that a pressure-sensitive adhesive layer having a constant shape can be transferred easily, accurately and efficiently.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a transfer sheet used in the present invention.

FIG. 2 is a schematic view showing one step (at the start of pressing) of the first embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention.

FIG. 3 is a schematic view showing one step (when pressing) of the first embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention.

FIG. 4 is a schematic view showing one step (at the end of pressing) of the first embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention.

FIG. 5 is a schematic view showing one step (at the start of pressing) of the first embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention.

FIG. 6 is a schematic view showing one step (at the time of pressing) of the first embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention.

FIG. 7 is a schematic view showing one step (at the end of pressing) of the first embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention.

FIG. 8 is a schematic view showing one step (at the start of pressing) of the second embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention.

FIG. 9 is a schematic view showing a step (during pressing) of the second embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention.

FIG. 10 is a schematic view showing one step (at the start of pressing) of the second embodiment of the pressure-sensitive adhesive layer transfer method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transfer sheet 10 Support 11 Adhesive layer 2 Transfer sheet roll 3 Pressing member 4 Winding drive unit 5 Support winding roll 6 Adherent 7 Adherent fixing table

Claims (3)

[Claims] 1. A transfer sheet is formed by providing a pressure-sensitive adhesive layer on the surface of a support having a surface adhesive force of 1000 g / 50 mm or less, and the transfer sheet is adhered to a predetermined position on an adherend with the pressure-sensitive adhesive. A pressure-sensitive adhesive layer transfer method, characterized in that the transfer sheet is placed in a position facing the body, and then the transfer sheet is pressed from the support side toward the adherend by a pressing member having a constant shape. 2. The pressure-sensitive adhesive layer according to claim 1, wherein the pressing member is fixed at a fixed position, and the transfer sheet and the adherend are conveyed in a predetermined direction after completion of pressing. Transfer method. 3. The pressure-sensitive adhesive layer according to claim 1, wherein the transfer sheet and the adherend are fixed at a fixed position, and the pressing member is moved on an orbit facing the transfer sheet. Transfer method.