JP3005548U - Double-sided tape - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a double-sided tape shape that facilitates the peeling work of the release paper of the double-sided tape, does not require the folding step of the release paper in the work, and prevents damage to the release paper. [Structure] In a double-sided tape, at least one of a pair of release papers is divided into a plurality of sheets. Further, in the double-sided tape, at least one of the pair of release papers has a lead portion that is an extension piece extended to the outside of the peripheral edge of the covering portion that covers the adhesive layer, and the peripheral edge of the covering portion and the lead portion A continuous portion with the peripheral edge is formed by a curved line.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a double-sided tape for adhering two flat plates to each other, and more particularly, to a double-sided tape having release papers on both sides thereof, and a release paper shape for improving workability of sticking work.

[0002]

[Prior art]

 At present, double-sided tape is widely used in the manufacturing process or assembly process in many fields. Although the double-sided tape is one of the means used for adhering two surfaces, it has advantages such as easier adhesion work and handling, no need for preparation, and no variation in the adhesive layer, as compared with an adhesive.

For example, in an electronic device using a flat sensor, a shield plate that covers the entire surface of the sensor substrate is often provided in parallel with the sensor substrate in order to block external noise on the sensor surface, that is, the sensor substrate. . FIG. 5 is a diagram showing a conventional work process of adhering the sensor substrate 40 and the shield plate 50 using the double-sided tape 10 as one example of using the double-sided tape. A conventional double-sided tape 10 is composed of a central support film, adhesive layers 14a and 14b provided on both sides thereof, and a pair of release papers 20a and 20b attached to cover the entire outer surfaces of both adhesive layers. To be done. The release papers 20a and 20b are provided for the purpose of protecting the adhesive layers 14a and 14b before the tape is used and for the convenience of handling, and it is necessary to remove the release papers when using the tape.

First, in FIG. 5a), the release paper 20a on one side of the double-sided tape 10 is partially peeled off to partially expose the adhesive layer 14a. At this time, in order to prevent the peeled release paper from returning to its original state, the peeled portion is once bent to improve workability. Next, the double-sided tape 10 is placed at an appropriate position with the surface of the release paper 20a on which the release paper 20a has been partially removed facing the sensor substrate 40, and temporarily fixed by the partially exposed adhesive layer 14a. At this time, the position can be adjusted. After the position is determined, the remaining portion of the release paper 20a is peeled off to fix one surface of the double-sided tape 10 on the sensor substrate 40.

Next, as shown in b), after peeling off all the release paper 20b on the other surface of the double-sided tape 10, the shield plate 50 is placed and fixed at an appropriate position on the adhesive layer 14b.

[0006]

[Problems to be solved by the device]

 There are some problems in the above-described conventional work process. First, the release paper adheres to the adhesive layer with a strength that allows it to be easily peeled off, but the adhesive layer and the release paper are often in close contact, so only the release paper should be pulled from the edge at the beginning of peeling. It was difficult and difficult to wake up. In particular, in the conventional double-sided tape in the example shown in FIG. 5, the adhesive layer and the release paper are laminated in exactly the same shape, so a piece that can be a clue when peeling the release paper from any position on the periphery is used. Hard to cause.

Further, if the release paper is temporarily bent in advance when temporarily fixing the first adhesive surface, the release paper may return to its original position when arranging this surface downward. However, the workability was poor.

Further, when the other release paper is peeled off, the double-sided tape has already been fixed to the hard plate such as the substrate, so the work of causing the release paper from the edge at the beginning of peeling is very difficult. .

FIG. 6 a) shows another example of the conventional double-sided tape 10. In order to improve the drawbacks of the conventional example shown in FIG. 5, by extending a part of the peripheral edge of one release paper 20b (FIG. 6a) on the rear side, a piece 22 (hereinafter referred to as a clue) that serves as a clue to the start of peeling. (Referred to as a cord portion). The other side of the release paper 20a (FIG. 6a) has the same shape as the adhesive layer. When the peeling paper 20b provided with the lead portion 22 is started to be peeled off, the peeling paper 20b can be easily peeled off by holding and pulling the lead portion 22. Hereinafter, in the release paper having the lead portion, a portion excluding the lead portion, that is, a portion that covers the adhesive layer is referred to as a covering portion (shaded portion 28 in FIG. 6A).

However, the conventional lead portion is provided in a substantially quadrangular shape as shown in FIG. 6, and the point 25 where the peripheral edge 24 of the covering portion and the peripheral edge 26 of the lead portion intersect each other forms a right angle. Therefore, when the release paper 20 is peeled off, a force often concentrates on the corner portion 25 of the boundary between the covering portion 28 and the lead portion 22 and the release paper 20b is torn from the corner portion 25 as shown in FIG. 6B). did. If the release paper is torn in this way, the subsequent work becomes extremely difficult and time-consuming.

In view of the above, an object of the present invention is to provide a double-sided tape shape that facilitates the peeling work of the release paper of the double-sided tape.

A further object of the present invention is to provide a double-sided tape shape that eliminates the step of folding the release paper in the release paper peeling operation of the double-sided tape.

A further object of the present invention is to provide a double-sided tape shape that prevents damage to the release paper during the operation of separating the release paper from the double-sided tape.

[0014]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides the following configurations. 1) In a double-sided tape having an adhesive layer provided on both sides of a support film and a pair of release papers attached to cover the adhesive layers on both sides, at least one of the pair of release papers is plural. Provided is a double-sided tape characterized by being divided into pieces.

2) A double-sided tape having a pressure-sensitive adhesive layer provided on both sides of a support film and a pair of release papers attached to cover the pressure-sensitive adhesive layers on both sides, at least one of the pair of release papers. One has a lead portion that is an extension piece that extends outside the peripheral edge of the coating portion that covers the adhesive layer, and the continuous portion between the peripheral edge of the coating portion and the peripheral edge of the lead portion is formed as a curve. A double-sided tape is provided.

3) In a double-sided tape having an adhesive layer provided on both sides of a support film and a pair of release papers attached to cover the adhesive layers on both sides, one of the pair of release papers is The cover portion is divided into a plurality of pieces, and the other of the pair of release papers has a lead portion that is an extension piece that extends outside the peripheral edge of the cover portion that covers the adhesive layer. The double-sided tape is characterized in that a continuous portion between the peripheral edge of the lead part and the peripheral edge of the lead part is formed in a curved line.

[0017]

[Action]

 In the double-sided tape having the configuration of 1) above, since the release paper is divided into a plurality of pieces, any of the pieces can be easily peeled from the joint. Furthermore, if one of the divided pieces is completely removed to expose a part of the adhesive layer, that part can be used for temporary fixing. At this time, it is not necessary to bend the release paper.

In the double-sided tape having the above configuration 2), the release paper is provided with the lead portion which is an extension piece extended to the outside of the peripheral edge of the covering portion covering the adhesive layer. Since the continuous portion between the peripheral portion of the lead portion and the peripheral portion of the coating portion is formed in a curved line, an unreasonable force is not applied to the continuous portion of the lead portion and the coating portion in the work of peeling the release paper by holding the lead portion, Release paper does not tear.

According to the configuration of 3) above, one of the pair of release papers is divided into a plurality of pieces, and the other is provided with a lead portion having a continuous portion constituted by a curved line. One release paper can be easily peeled from the seam of the divided pieces, and if only one piece is peeled off, it can be used as a temporary fixing. Further, after the surface of the divided release paper has been attached, the release paper can be removed by holding the lead portion on the other surface. Since the continuous portion of the lead portion is a curved line, no excessive force is applied and the release paper is not damaged.

[0020]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view a) and a side view b) of a double-sided tape 10 which is an embodiment of the present invention. The double-sided tape 10 includes a support film 12, adhesive layers 14a and 14b, and release papers 20a and 20b.

As shown in FIG. 1 a), the front side release paper 20 a is composed only of a covering portion for covering the adhesive layer. However, in the embodiment according to the present invention, two pieces 101 are separated by the seam 200. , 102. This is to improve the conventional peeling operation of the double-sided tape in that it was difficult to obtain a piece that would be a clue to the start of peeling and that it was necessary to bend the release paper once for temporary fixing. .

The release paper 20b on the rear side is composed of a covering portion of the adhesive layer (not shown because it has the same shape as the release paper 20a and overlaps) and a lead portion 22. As shown in the side view of FIG. 1b), the lead portion 22 of the release paper 20b is a portion extended from the peripheral edge of the adhesive layer and serves as a clue for pulling the release paper 20b when it is peeled off. It's a piece. The present invention is characterized in that the corner portion 25, which is a continuous portion of the peripheral edge 26 of the lead portion 22 and the peripheral edge 24 of the adhesive layer covering portion, is formed in a curved line. This is to improve the drawback that the lead portion of the conventional double-sided tape is easily damaged from the corner portion 25 during the peeling work.

FIG. 2 shows working steps using the embodiment of FIG. For comparison, the case where the sensor substrate 40 and the shield plate 50 (not shown) are adhered to each other is taken as an example as in FIG. First, in FIG. 2a), one of the divided pieces 101 of the release paper 20a is peeled off. At this time, if the seam 200 is broken, the piece 101 can be easily peeled off. In this way, the adhesive layer 14a is partially exposed. After that, the exposed surface is temporarily fixed to the sensor substrate 40 to adjust the position. As described above, in the present proposal, it is not necessary to fold the release paper once for temporary fixing. When the position is determined, the remaining piece 102 is removed and one side of the double-sided tape 10 is fixed to the sensor substrate 40. Thereafter, as shown in FIG. 2B), the lead 22 of the release paper 20b is held and pulled to remove the release paper 20b entirely, and the shield plate 50 is stuck and fixed thereon. At this time, since the continuous portion 25 of the peripheral portion of the lead portion and the peripheral portion of the covering portion is formed in a curved line, it can be smoothly peeled off without concentration of force on the corner portion, and the release paper may be damaged from the corner portion. There is no

In the embodiment of FIG. 1, the constitution is such that the release paper on one surface is divided, and the lead portion is provided on the separation on the other surface to improve the drawbacks of the conventional double-sided tape. If the above measures are sufficient, only one release paper may be provided with either configuration. In the divided structure, the number of divided pieces is not limited to two, and the divided shape can be designed arbitrarily.

Further, both surfaces may have the same configuration so that the work can be started from either surface. That is, the release paper on both sides may be divided, or the lead paper may be provided on the release paper on both sides. Further, the release paper on both sides may be divided, and a divided piece requiring a lead portion may be selected from a plurality of divided pieces and a lead portion may be appropriately provided.

FIG. 3 is a diagram showing various embodiments in which the shape of the lead portion 22 is different. In FIG. 3a), one side of the release paper 20b of the double-sided tape is extended to be a lead portion, and in FIG. 3b), a lead portion having a continuous portion formed in a curve on both sides is provided at an intermediate position of one side of the release paper 20b. In 3c), the size of the release paper 20b is set to the size that extends from the entire peripheral edge of the double-sided tape, and the part that protrudes is used as the lead portion.

FIG. 4 is a diagram showing another embodiment of the lead portion 22. Although the lead portion is provided as an extension of the release paper in the above embodiment, the lead portion may be prepared separately from the release paper and attached to the release paper as shown in FIG. In the case of this embodiment, the material of the lead portion can be different from that of the release paper, so it is possible to select a material that is easy to grip.

[0028]

[Effect of device]

 As described above, in the present invention, the release paper of the double-sided tape can be easily peeled off by improving the structure of the release paper. Further, the step of temporarily bending the release paper at the time of temporary fixing is not necessary, and the release paper can be smoothly peeled off without damaging the lead portion. Therefore, the adhesive work using the double-sided tape can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of a double-sided tape according to the present invention.

FIG. 2 is a view showing a bonding operation using the double-sided tape according to the first embodiment of the present invention.

FIG. 3 is a schematic view of another embodiment of the double-sided tape according to the present invention.

FIG. 4 is a schematic view of another embodiment of the double-sided tape according to the present invention.

FIG. 5 is a diagram showing a bonding operation using a conventional double-sided tape.

FIG. 6 is a diagram showing an example of the shape of a release paper of a conventional double-sided tape.

[Explanation of symbols]

 10 Double-sided Tape 12 Support Films 14a, 14b Adhesive Layers 20a, 20b Release Paper 22 Release Paper Lead Part 24 Release Paper Covering Edge 25 Perimeter Covering Edge of Release Paper and Continuation of Lead Edge 26 Release Paper Leading Part Edge 28 Adhesive layer coating portion of release paper 101, 102 Divided pieces of release paper 200 Joints of divided pieces

Claims (3)

[Scope of utility model registration request] 1. A double-sided tape comprising an adhesive layer provided on both sides of a support film and a pair of release papers attached to cover the adhesive layers on both sides, wherein at least one of the pair of release papers is provided. A double-sided tape characterized by being divided into a plurality of pieces. 2. A double-sided tape having an adhesive layer provided on both sides of a support film and a pair of release papers attached to cover the adhesive layers on both sides, wherein at least one of the pair of release papers is The adhesive layer has a lead portion that is an extension piece that extends outside the periphery of the coating portion that covers the adhesive layer, and a continuous portion between the periphery of the coating portion and the periphery of the lead portion is formed in a curved line. A double-sided tape characterized by that. 3. A double-sided tape having an adhesive layer provided on both sides of a support film and a pair of release papers attached to cover the adhesive layers on both sides, wherein one of the pair of release papers is plural. It is divided into a piece of a sheet, the other of the pair of release paper has a lead portion which is an extension piece extended to the outside of the periphery of the covering portion that covers the adhesive layer, and the covering portion A double-sided tape characterized in that a continuous portion between the peripheral edge and the peripheral edge of the lead portion is formed in a curved line.