JPH0530133U - Adhesive body - Google Patents

Abstract

(57) [Summary] [Objective] An object of the present invention is to provide a silicone adhesive body such as a silicone adhesive tape or a silicone adhesive sheet that can be easily peeled off even if a mistake is made during the pasting work and can be replaced. . [Structure] The pressure-sensitive adhesive body of the present invention comprises a pressure-sensitive adhesive layer 3 obtained by mixing a silicone pressure-sensitive adhesive 1 with a spherical silicone polymer 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pressure-sensitive adhesive body such as a pressure-sensitive adhesive tape or a pressure-sensitive adhesive sheet which is easy to paste and has heat resistance.

[0002]

[Prior Art]

 Adhesives such as pressure-sensitive adhesive tapes and pressure-sensitive adhesive sheets coated with silicone pressure-sensitive adhesives are excellent in heat resistance, cold resistance, durability, electrical insulation, etc., and are already widely used.

[0003]

[Problems to be solved by the device]

 However, with the conventional adhesives such as these adhesive tapes and adhesive sheets, there is a problem that it is extremely difficult to easily remove the adhesive tapes once they are attached during the attaching operation without peeling them off.

[0004] Although it is not a conventional silicone adhesive, it is possible to replace it as an acrylic adhesive with a glass balloon blended to make the adhesive surface rough, or an acrylic adhesive with a pigment. An adhesive having a roughened adhesive surface has been known, but there is a problem in any case. That is, when glass balloons or pigments are blended with an acrylic pressure-sensitive adhesive, the adhesiveness and compatibility between the two are insufficient, and there is a problem that the glass balloons or pigments cover the surface of the pressure-sensitive adhesive and reduce the adhesive strength, etc. is there. An object of the present invention is to solve the above-mentioned problems and to provide a silicone adhesive tape such as a silicone adhesive tape or a silicone adhesive sheet which can be easily peeled off even if a mistake is made during the attaching work and can be replaced.

[0005]

[Device configuration]

 The pressure-sensitive adhesive body of the present invention is characterized by including a pressure-sensitive adhesive layer 3 in which a spherical silicone polymer 2 is mixed with a silicone pressure-sensitive adhesive 1 as shown in FIG. In the figure, reference numeral 4 denotes a base material of an adhesive body such as an adhesive tape or an adhesive sheet.

In the pressure-sensitive adhesive body of the present invention, a release liner 5 may be attached to the pressure-sensitive adhesive surface side of the pressure-sensitive adhesive layer 3 as shown in FIG. 2, or as shown in FIG. The peeling layer 6 may be formed on the back surface side of the adhesive layer 4, and an adhesion enhancing layer (not shown) may be provided between the adhesive layer 3 and the base material 4. Furthermore, the adhesive body of the present invention is provided with an adhesive layer 7 composed of only the silicone adhesive 1 on the back surface of the substrate 4 as shown in FIG. 4, or as shown in FIG. A double-sided pressure-sensitive adhesive body can be formed by providing the pressure-sensitive adhesive layer 7 composed of only the direct silicone pressure-sensitive adhesive 1 on the back surface of the pressure-sensitive adhesive layer 3 in which 1 is mixed with the spherical silicone polymer 2. 2 to 4, the same components as those in FIG. 1 are designated by the same reference numerals and their description is omitted.

As the silicone pressure-sensitive adhesive, known ones such as an organic peroxide curing type and a platinum-based catalyst curing type can be used.

As the spherical silicone polymer, for example, a polymer having rubber elasticity such as Tospearl (trade name) manufactured by Toshiba Silicone Co., Ltd. is used. Spherical polymers other than silicone polymers cannot be used because they impair heat resistance, cold resistance, durability, electrical insulation and the like. The average particle diameter of the spherical silicone polymer is important and is 0.1 to 100 µ, preferably 1 to 60 µ. If the average particle size is smaller than 0.1 μ, it is difficult to replace the film when pasting, and if it is larger than 100 μ, the bonding becomes difficult. The amount of the spherical silicone polymer to be added is 0.5 to 105 parts by weight, preferably 10 to 50 parts by weight, based on 100 parts by weight of the silicone adhesive. When the compounding amount of the spherical silicone polymer is less than 0.5 parts by weight, it is difficult to replace the particles, and when it exceeds 105 parts by weight, the adhesive strength is significantly reduced, which is a practical problem.

As the base material of the pressure-sensitive adhesive body, known materials can be used, and typical examples thereof include polyesters, polyimides, polyetherimides, heat-resistant papers, metal foils, silicone rubbers, Teflon, etc., or composites. is there.

[0010]

[Action]

 The silicone adhesive and the spherical silicone polymer have good compatibility and adhesiveness with each other, and good adhesive properties can be obtained without removing the spherical silicone polymer. Further, while glass balloons and pigments are hard and brittle substances, spherical silicone polymers are flexible and have rubber elasticity, so they are easily integrated with the flexibility of the adhesive and stable adhesive properties can be obtained. Furthermore, when glass balloons and pigments are blended with the silicone adhesive, the original excellent properties of the silicone adhesive, that is, various properties such as heat resistance, cold resistance, and water resistance, are reduced. Almost no deterioration in characteristics is seen.

[0011]

【Example】

 Example 1 A silicone adhesive (trade name SD4580 manufactured by Toray Dow Corning Silicone Co., Ltd.) and a spherical silicone polymer (trade name Tospearl 120 manufactured by Toshiba Silicone Co., Ltd.) having an average particle diameter of 2 μ were mixed in a solid content ratio of 90/10. , 70/30, and 50/50 were coated on a polyester film having a film thickness of 50 μ by about 50 μ (dry) and then cured at 130 ° C. for 2 minutes to prepare an adhesive tape. All of these pressure-sensitive adhesive tapes were good because they were easy to replace immediately after application.

Comparative Example 1 A pressure-sensitive adhesive tape was prepared in the same manner as in Example 1 except that a silicone pressure-sensitive adhesive containing no spherical silicone polymer was used, but this pressure-sensitive adhesive tape could not be easily replaced.

[0013]

[Effect of the device]

 As described above in detail, according to the pressure-sensitive adhesive body of the present invention, a silicone pressure-sensitive adhesive body such as a silicone pressure-sensitive adhesive tape or a silicone pressure-sensitive adhesive sheet that can be easily peeled off even if a mistake is made during sticking work and can be replaced is provided. be able to.

[Brief description of drawings]

FIG. 1 is a diagram showing the structure of an embodiment of the adhesive body of the present invention.

FIG. 2 is a view showing the configuration of another embodiment of the adhesive body of the present invention.

FIG. 3 is a view showing the configuration of another embodiment of the adhesive body of the present invention.

FIG. 4 is a view showing the configuration of another embodiment of the adhesive body of the present invention.

FIG. 5 is a view showing the configuration of another embodiment of the adhesive body of the present invention.

[Explanation of symbols]

 1 Silicone Adhesive 2 Spherical Silicone Polymer 3 Adhesive Layer 4 Base Material 5 Release Liner 6 Release Layer 7 Adhesive Layer

Claims (2)

[Scope of utility model registration request] 1. A pressure-sensitive adhesive body such as a pressure-sensitive adhesive tape or pressure-sensitive adhesive sheet, comprising a pressure-sensitive adhesive layer comprising a silicone pressure-sensitive adhesive compounded with a spherical silicone polymer. 2. The spherical silicone polymer has an average particle diameter of 0.1 to 100 μm, and its compounding amount is 0.5 to 105 parts by weight based on 100 parts by weight of the silicone adhesive. Adhesive body described.