JP2000265132A - Double-sided tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a readily releasable and reusable double-sided tape having a high tack by applying and laminating adhesives having different tacks and sheets of release paper onto both surfaces of a substrate. SOLUTION: This double-sided tape is obtained by forming adhesives 2 and 3 having different tacks applied to both surfaces of a substrate 1, providing three layers and laminating sheets of mold release paper 4 applied to the surfaces of the adhesives 2 and 3 thereto or laminating the adhesives 3 applied to both surfaces of another substrate 6 and having the same tack to one of the surfaces of the substrate 1 to which the adhesives 3 are applied, forming five layers and further laminating sheets of the mold release paper 4 applied to the surfaces of the adhesives 2 and 3 thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided tape having an adhesive and a release paper adhered to both sides of a substrate.

[0002]

2. Description of the Related Art Conventionally, a double-sided tape having an adhesive and a release paper adhered to both sides of a substrate has been put to practical use. This type of double-sided tape is coated on both sides of the base material with an adhesive having the same adhesive strength, and peels off one release paper to be fixed at a predetermined location, and further peels off and holds the other release paper. Etc. were fixed. However, when a heavy article or the like is fixed, an adhesive having a high adhesive force is required, and once fixed, it cannot be easily peeled off. Therefore, it is necessary to select a double-sided tape according to the article to be fixed. Further, once peeled, they cannot be reused and become disposable. Further, there is a problem that a double-sided tape needs to be newly adhered thereon in order to fix a different article or the like.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an adhesive having a different adhesive strength and a release paper are attached to both surfaces of a base material to be laminated, thereby obtaining a high adhesiveness. It is an object of the present invention to provide a double-sided tape which can be easily used and peeled and can be reused.

[0004]

The double-sided tape according to the present invention comprises three layers of a base material and adhesives having different adhesive strengths applied to both surfaces thereof, and a release paper to be attached to the surface of the adhesive. The adhesive is applied to one surface of the substrate, and the adhesive is applied to both surfaces of another substrate to form a five-layer adhesive having the same adhesive strength, and is adhered to the surface of the adhesive. It is formed by laminating release paper.

[0005]

By adhering adhesives having different adhesive strengths on both sides of the base material, one side of the base material can be fixed with a high pressure-sensitive adhesive on one side of the base material, and the other side can be formed with an adhesive having good releasability and re-adhesiveness. Practicality is enhanced because the peeling and re-fixing of the article or the like can be easily performed. In addition, if an adhesive with good releasability is used for one layer, it can be used properly by replacing it with an adhesive with different tackiness according to the application, and it can be reused because it has good releasability, making it more practical Is enhanced.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A double-sided tape according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a three-layered double-sided tape according to the present invention. In the figure, 1 is a substrate made of a polyimide film, 2 is a low-adhesive adhesive applied to the substrate 1, 3 is a high-adhesive adhesive applied to the substrate 1, and 4 is an adhesive 2. It is a release paper attached to the surface of the adhesive 3.
A double-sided tape 5 is formed by adhering release papers 4 on both sides of a three-layer structure of a base material 1, an adhesive 2, and an adhesive 3. In this embodiment, a silicone-based pressure-sensitive adhesive having low tackiness is used as the pressure-sensitive adhesive 2, and an acrylic pressure-sensitive adhesive having high tackiness is used as the pressure-sensitive adhesive 3. Acrylic adhesive 3
When the release paper on the side is peeled off and fixed to the object to be bonded, the object to be bonded can be fixed with high adhesive force. When the release paper on the side of the silicone-based pressure-sensitive adhesive 2 is peeled off and the article or the like is fixed, the article or the like can be fixed with a low adhesive force. In addition, since the silicone-based pressure-sensitive adhesive has good releasability, it is easy to attach and detach an article or the like. Furthermore, since there is re-adhesiveness and no adhesive is attached to the article or the like, the article or the like can be easily replaced and the double-sided tape can be reused. If a material having heat resistance of 150 ° C. or more, such as polyimide, is used for the base material, it can be processed at a high temperature without deteriorating the adhesiveness, and can be used repeatedly.

FIG. 2 is a sectional view showing a double-sided tape having a five-layer structure according to the present invention. In the figure, 1 is a substrate made of a polyimide film, 2 is a low-adhesive pressure-sensitive adhesive applied to the substrate 1, 6 is another substrate made of a polyester film, and 3 is applied to both surfaces of the substrate 6. High-tack adhesive,
Reference numeral 4 denotes a release paper stuck on the surfaces of the adhesive 2 and the adhesive 3. Base 1, adhesive 2, base 6, adhesive 3 on both sides of base 6
A double-sided tape 7 is formed by attaching release paper 4 to both sides of the five-layer structure. In the five-layer structure, a silicone-based pressure-sensitive adhesive having a low tackiness is used as the pressure-sensitive adhesive 2 as in the three-layer structure, and a polyester film is used as the base material 6. An acrylic pressure-sensitive adhesive having the following formula is used. By having a five-layer structure, it can be used properly according to the use of the adherend at the bonding portion, and can be replaced by using a highly adhesive adhesive similar to the adhesive 3 on the adhesive 2 having good releasability. Can be used for two types of applications for ease. Furthermore, if a high-tack adhesive and a low-tack adhesive are used separately in two places, the use can be expanded. By selectively using according to the application in this way, it is possible to easily switch by peeling off the film base portion between the case where high adhesiveness is required and the case where low adhesiveness is required, and increase the use efficiency. be able to. For applications,
It can be used as a heading paper sheet or a sheet using a magnet which is used as general household or office supplies. In addition, for industrial use, for example, when the jig is fixed to a transfer tape or the positioning of a substrate in a semiconductor device, the peelability is good, so that the positioning is easy, and even after the fixing, the peeling can be easily performed. The tape can be reused. The structure of this embodiment is not limited to this, and can be used for various purposes by changing the combination of the base material and the adhesive to be used. Also, the adhesive is not limited to this embodiment.

[0008]

As described above in detail, according to the double-sided tape of the present invention, a high-adhesive adhesive and a low-adhesive adhesive are provided on both sides of a base material so that the adhesive is strongly adhered. There is a great effect that the part to be fixed and the part that can be reused without leaving the adhesive on the adhered body can be selectively used depending on the application. In addition, by having a five-layer structure and easily combining a high-tack adhesive and a low-tack adhesive through a film substrate, it can be used in a wide range of applications with a simple structure. Can be expected.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a three-layered double-sided tape according to the present invention.

FIG. 2 is a sectional view showing a double-sided tape having a five-layer structure according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Substrate 2 ... Low-adhesive adhesive 3 ... High-adhesive adhesive 4 ... Release paper 5, 7 ... Double-sided tape 6 ... Another substrate

Claims (2)

[Claims] 1. The present invention relates to a release paper which is formed into three layers with a substrate (1) and adhesives (2, 3) having different adhesive strengths applied to both surfaces thereof, and to be applied to a surface of the adhesive. (4) A double-sided tape characterized by being laminated. 2. An adhesive (3) having the same adhesive strength applied to one surface of the substrate coated with the adhesive (2, 3) and to both surfaces of another substrate (6). 2.) The double-sided tape according to claim 1, wherein a release paper (4) attached to the surface of the adhesives (2) and (3) is laminated into five layers.