Adhesive tape

Abstract

To provide an adhesive tape having high heat insulation property and heat resistance.SOLUTION: There is provided an adhesive tape 10. The adhesive tape 10 contains a glass cloth 2 having a first surface 22 and a second surface 23, a porous silicone resin layer 1 provided on the first surface 22, and an adhesive layer 3 provided on the second surface 23. The adhesive layer 3 contains a silicone-based adhesive.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an adhesive tape. [Background technology]

[0002] One type of adhesive tape used for heat insulation is aluminum foil adhesive tape. Aluminum foil adhesive tape can reflect infrared rays using aluminum foil. Therefore, it can provide a heat-shielding effect by blocking heat radiation. However, aluminum foil has a high thermal conductivity. Therefore, there is a problem that it is difficult to achieve an insulating effect against heat conduction. An example of aluminum foil adhesive tape is the adhesive tape described in Patent Document 1.

[0003] Patent Document 2 describes a glass cloth adhesive tape. However, the glass cloth adhesive tape is thin and has little heat insulating effect. Therefore, in order to obtain the desired heat insulating effect, it is necessary to apply multiple layers of adhesive tape, which is troublesome. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-301150 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-169382 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a pressure-sensitive adhesive tape having high heat insulating properties. [Means for solving the problem]

[0006] According to an embodiment, there is provided an adhesive tape. The adhesive tape includes a glass cloth having a first surface and a second surface, a porous silicone resin layer provided on the first surface, and an adhesive layer provided on the second surface. The adhesive layer includes a silicone-based adhesive. [Effects of the Invention]

[0007] According to an embodiment of the present invention, a pressure-sensitive adhesive tape having high heat insulating properties can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view schematically illustrating an example of a pressure-sensitive adhesive tape according to an embodiment. [Figure 2] 4 is a graph showing the relationship between the thickness of the adhesive tape and the heat insulating property for the adhesive tape of the example. [Figure 3] 4 is a graph showing the relationship between the amount of foaming agent added and the heat insulating properties of the pressure-sensitive adhesive tapes of Examples and Comparative Examples. DETAILED DESCRIPTION OF THE INVENTION

[0009] According to an embodiment, there is provided an adhesive tape. The adhesive tape includes a glass cloth having a first surface and a second surface, a porous silicone resin layer provided on the first surface, and an adhesive layer provided on the second surface. The adhesive layer includes a silicone-based adhesive.

[0010] The porous silicone resin layer has low thermal conductivity, and therefore the thermal conductivity of the pressure-sensitive adhesive tape including the porous silicone resin layer can be reduced, thereby improving the heat insulating properties of the pressure-sensitive adhesive tape.

[0011] The porous silicone resin layer, the glass cloth, and the silicone-based pressure-sensitive adhesive all have excellent heat resistance, and therefore the heat resistance of the pressure-sensitive adhesive tape can be improved.

[0012] The pressure-sensitive adhesive tape according to the embodiment will be further described below.

[0013] The thickness of the adhesive tape is not particularly limited, but can be, for example, within the range of 0.5 mm to 6 mm. A thicker adhesive tape tends to improve heat insulation and strength. A thinner adhesive tape tends to improve flexibility. The thickness of the adhesive tape is preferably, for example, 0.7 mm to 3.2 mm.

[0014] The pressure-sensitive adhesive tape according to the embodiment includes a silicone-based pressure-sensitive adhesive having excellent heat resistance, and therefore can be used by being directly attached to a heat source. Furthermore, when the pressure-sensitive adhesive tape is directly attached to a heat source, the heat conducted from the heat source is insulated by the porous silicone resin layer, which has low thermal conductivity. Therefore, the pressure-sensitive adhesive tape according to the embodiment can exhibit a heat insulating effect even when attached directly to a heat source, and therefore can be suitably used for applications in which the tape is directly attached to a heat source.

[0015] 1 is a cross-sectional view schematically illustrating an example of a pressure-sensitive adhesive tape according to an embodiment. The Y-axis direction is parallel to the thickness direction of the pressure-sensitive adhesive tape. The X-axis direction is perpendicular to the Y-axis direction. The Z-axis direction is perpendicular to both the X-axis and Y-axis directions.

[0016] The adhesive tape 10 includes a porous silicone resin layer 1 , a glass cloth 2 , and an adhesive layer 3 .

[0017] The glass cloth 2 has two main surfaces that intersect with the Y-axis direction. One of the two main surfaces is a first surface 22, and the other is a second surface 23. Of the glass cloth 2, a porous silicone resin layer 1 is provided on the first surface 22, and an adhesive layer 3 is provided on the second surface 23.

[0018] The porous silicone resin layer, the glass cloth, and the adhesive layer provided in the adhesive tape according to the embodiment will be described below.

[0019] (Porous silicone resin layer) The porous silicone resin layer 1 is a layer containing, for example, a silicone resin and air bubbles (not shown). The porous silicone resin layer may optionally contain a pigment, a coupling agent, or talc.

[0020] The bubbles contribute to reducing the thermal conductivity of the porous silicone resin layer. If the thickness of the porous silicone resin layer is large, the bubbles can be easily trapped inside the porous silicone resin layer, which is preferable because it can improve the heat insulation. The thickness of the porous silicone resin layer can be, for example, 0.2 mm or more, and may be 200 μm or more.

[0021] When the porosity of the porous silicone resin layer is large, the heat insulating property tends to be improved. The porosity of the porous silicone resin layer can be, for example, 40% or more. When the porosity of the porous silicone resin layer is small, the strength tends to be high. The porosity of the porous silicone resin layer can be, for example, 80% or less.

[0022] The porosity of the porous silicone resin layer can be measured, for example, as follows.

[0023] First, the volume of the porous silicone resin layer is calculated by multiplying the area of ​​the porous silicone resin layer by its thickness. Next, the theoretical weight for the obtained volume is calculated from the specific gravity of the silicone resin. Furthermore, the actual weight of the porous silicone resin layer to be measured is measured. The difference between the theoretical weight and the actual weight is divided by the theoretical weight and multiplied by 100 to calculate the porosity (%).

[0024] The silicone resin contained in the porous silicone resin layer has excellent heat resistance and weather resistance, and therefore the heat resistance and weather resistance of the pressure-sensitive adhesive tape containing the silicone resin can be improved.

[0025] The silicone resin is preferably one containing, for example, a coupling agent. Such a silicone resin can have good adhesion to inorganic materials. Therefore, it is easy to adhere to glass. Therefore, peeling between the glass cloth and the porous silicone resin layer can be suppressed. Therefore, a high-strength adhesive tape can be obtained.

[0026] The bubbles contained in the porous silicone resin layer contribute to increasing the cushioning properties of the porous silicone resin layer.

[0027] The smaller the size of the bubbles and the greater the number of bubbles, the higher the heat insulating properties of the porous silicone resin layer, which is preferable.

[0028] The porous silicone resin layer may further include talc. The porous silicone resin layer may further include a pigment. The pigment may be blended in, for example, to color the porous silicone resin layer.

[0029] The thickness of the porous silicone resin layer is easy to adjust. As will be described in detail later, the thickness of the porous silicone resin layer can be adjusted, for example, by adjusting the proportion of the foaming agent in the raw material liquid described later or the thickness of the coating film when applying the raw material liquid to the glass cloth. Therefore, for example, a porous silicone resin layer with a large thickness can be easily formed. Furthermore, even if the thickness of the porous silicone resin layer is increased, the rigidity does not become too strong. Therefore, even if the thickness is increased, processing can be easily performed.

[0030] (glass cloth) Examples of the glass cloth 2 include woven or nonwoven fabrics containing glass fibers 21. While FIG. 1 illustrates a woven fabric in which glass fibers 21 are plain woven as the glass cloth 2, the form of the glass cloth 2 is not limited to this. For example, a woven fabric containing glass fibers may be formed by a weaving method other than plain weaving, and the woven fabric may be used as the glass cloth. Examples of weaving methods other than plain weaving include twill weave, satin weave, leno weave, and moss weave. In addition, a nonwoven fabric containing glass fibers may be used as the glass cloth. The glass cloth may include gaps (mesh).

[0031] From the viewpoint of improving heat resistance, it is preferable that the glass cloth 2 is made of glass fiber. An example of a glass cloth made of glass fiber is a plain woven fabric of glass fiber.

[0032] The glass cloth can move in response to the expansion of the coating film due to heating. Specifically, for example, it can stretch in response to the expansion of the coating film due to heating. As will be described later, the manufacturing method of a porous silicone resin layer can include a step of forming a coating film containing a silicone resin on a glass cloth as a core, and then expanding the coating film by heating to obtain a porous silicone resin layer. Therefore, if a material that does not follow the expansion of the coating film is used as the core, only the coating film will expand when heated, and the porous silicone resin layer may curl toward the core. An example of a material that does not follow the expansion of the coating film is a fabric in which glass cloth is pre-impregnated and coated with a resin or the like.

[0033] The pressure-sensitive adhesive tape according to the embodiment includes a glass cloth that can accommodate expansion of the coating film due to heating, and therefore can suppress warping of the porous silicone resin layer due to expansion of the coating film, which is preferable from the viewpoint of producing a flat pressure-sensitive adhesive tape.

[0034] Glass cloth has high heat resistance, weather resistance and insulating properties, and therefore the heat resistance, weather resistance and insulating properties of an adhesive tape containing glass cloth can be improved.

[0035] (Adhesive layer) The thickness of the adhesive layer 3 is not particularly limited, but is, for example, in the range of 25 μm to 80 μm.

[0036] The adhesive layer 3 contains a silicone-based adhesive. The silicone-based adhesive has high adhesion to silicone resin. The silicone-based adhesive contained in the adhesive layer and the silicone resin contained in the porous silicone resin layer can come into contact with each other through the mesh of the glass cloth. In this case, the adhesion between the silicone-based adhesive and the silicone resin can be increased. Therefore, it is believed that the adhesion between the adhesive layer containing the silicone-based adhesive and the porous silicone resin layer can be improved.

[0037] The silicone-based adhesive may be a mixture containing a silicone resin. For example, it may be a mixture of a silicone resin and a silicone polymer. The silicone resin may function as a tackifier.

[0038] The adhesive layer 3 may further contain a curing agent, a pigment, etc. in addition to the silicone adhesive. The adhesive layer 3 may not contain any air bubbles.

[0039] Specific examples of silicone-based adhesives include peroxide-curing adhesives and addition-curing adhesives. When a peroxide-curing adhesive is used as the silicone-based adhesive, at least one selected from the group consisting of benzoyl peroxide, dicumyl peroxide, p-chlorobenzoyl peroxide, 2,4-dichlorobenzoyl peroxide, and di-t-butyl peroxide can be used as the curing agent. When an addition-curing adhesive is used as the adhesive, platinum, for example, can be used as the curing agent.

[0040] Silicone-based pressure-sensitive adhesives have high heat resistance. Therefore, the heat resistance of pressure-sensitive adhesive tapes containing silicone-based pressure-sensitive adhesives can be increased. Therefore, such pressure-sensitive adhesive tapes can be suitably used, for example, in applications where they are directly attached to a heat source. Furthermore, silicone-based pressure-sensitive adhesives have high weather resistance and insulating properties. Therefore, the weather resistance and insulating properties of pressure-sensitive adhesive tapes containing silicone-based pressure-sensitive adhesives can be increased.

[0041] (Manufacturing method) The pressure-sensitive adhesive tape according to the embodiment can be produced, for example, by forming a porous silicone resin layer on one main surface (first surface) of a glass cloth, and then forming a pressure-sensitive adhesive layer on the other main surface (second surface).

[0042] First, the method for forming the porous silicone resin layer will be described below.

[0043] The porous silicone resin layer can be formed, for example, by applying a raw material liquid to a glass cloth to form a coating film, and then drying the coating film.

[0044] The raw material liquid can be obtained by, for example, mixing and stirring a silicone resin and a foaming agent. The raw material liquid may further contain a pigment, a coupling agent, or talc.

[0045] The foaming agent may be, for example, a chemical foaming agent, a physical foaming agent, or a thermally expandable microcapsule. One or more types of foaming agents may be used.

[0046] The higher the proportion of the foaming agent in the raw material liquid, the higher the porosity of the porous silicone resin layer that is formed. The thickness also tends to increase. The proportion of the foaming agent in the raw material liquid can be, for example, 1% by mass or more and 10% by mass or less. The proportion of the foaming agent in the raw material liquid is preferably 3% by mass or more and 7% by mass or less.

[0047] When the raw material liquid is sufficiently stirred, the porous silicone resin layer can be produced stably. Specifically, a porous silicone resin layer with a uniform porosity and / or thickness is easily obtained.

[0048] The resulting raw material solution is applied to a glass cloth to form a coating film. By increasing the thickness of the coating film, the thickness of the resulting porous silicone resin layer can be increased.

[0049] The coating is then heated and dried. Heating causes bubbles to form inside the coating, causing the coating to expand. This allows a porous silicone resin layer to be obtained. Drying can be carried out at, for example, 180°C.

[0050] Next, a method for forming the adhesive layer will be described.

[0051] The adhesive layer can be formed, for example, by applying a silicone adhesive to a glass cloth to form an adhesive coating, and then drying the adhesive coating, which can be done at a temperature of 90°C or higher and 160°C or lower.

[0052] In this manner, the adhesive tape according to the embodiment can be manufactured. Since the adhesive layer is provided on only one side of this adhesive tape, it can be wound into a roll after the adhesive layer is formed. After the adhesive layer is formed, a release paper (separator) may be attached to the adhesive layer.

[0053] <Example> Example 1 The adhesive tape according to Example 1 was produced as follows.

[0054] First, a raw material liquid for forming a porous silicone resin layer was prepared. The raw material liquid was produced by mixing and stirring a silicone resin and a foaming agent. The ratio of the foaming agent to the raw material liquid was adjusted to 3% by mass.

[0055] A woven fabric made of glass fibers and having two main surfaces was prepared as the glass cloth. The glass cloth had a thickness of 0.1 mm.

[0056] One of the two main surfaces of the glass cloth was designated the first surface, and the other surface was designated the second surface. The raw material liquid was applied to the first surface so that the thickness of the resulting adhesive tape would be 3 mm, forming a coating film. This coating film was heated and dried. Drying was carried out at 80°C for 5 minutes. Heating caused bubbles to form inside the coating film, causing it to expand. Thus, a porous silicone resin layer with a thickness of 2.6 mm and a porosity of 60% was obtained.

[0057] Next, a silicone adhesive was applied to the second surface of the glass cloth to form an adhesive coating film, which was then dried at 160°C for 5 minutes to form an adhesive layer.

[0058] (Comparative Example 1) The sheet according to Comparative Example 1 was produced as follows.

[0059] The raw material liquid was prepared by mixing and stirring only the silicone resin. The raw material liquid was applied to a release film so that the coating thickness was 3 mm. This coating was then heated and dried at 160°C for 5 minutes. After drying, the release film was removed to obtain a sheet with a thickness of 3 mm and a porosity of 0%.

[0060] (Measurement method) The maximum use temperature of the pressure-sensitive adhesive tape according to Example 1 was 200°C, which was the lowest of the heat resistance temperatures of the porous silicone resin layer, the glass cloth, and the pressure-sensitive adhesive layer. The maximum use temperature of the sheet according to Comparative Example 1 was 200°C, which was the heat resistance temperature of the silicone resin.

[0061] The thickness of the pressure-sensitive adhesive tape according to Example 1 and the sheet according to Comparative Example 1 was measured using a digital thickness gauge.

[0062] The adhesive strength and breakdown voltage of the adhesive tape according to Example 1 were measured by the following methods.

[0063] The adhesive strength was measured by a 180-degree peeling test, specifically, the test was carried out according to the method described in JIS-C-2107.

[0064] The breakdown voltage was measured in oil using a breakdown voltage measuring device, specifically according to the method described in JIS-C-2107.

[0065] The heat insulating performance of the pressure-sensitive adhesive tape according to Example 1 and the sheet according to Comparative Example 1 was measured as follows.

[0066] A hot plate was prepared as a heat source. The adhesive tape according to Example 1 was attached to the heat source so that the adhesive layer was in contact with the surface of the heat source. The sheet according to Comparative Example 1 was placed on the heat source. Next, the heat source was heated so that the surface temperature reached 198°C. The surface temperatures of the adhesive tape according to Example 1 and the sheet according to Comparative Example 1, and the surface temperature of the heat source were measured using a thermal camera.

[0067] (Measurement results) The thickness and maximum use temperature of the pressure-sensitive adhesive tape according to Example 1 and the sheet according to Comparative Example 1 are shown in Table 1. The adhesive strength and breakdown voltage of the pressure-sensitive adhesive tape according to Example 1 are also shown in Table 1.

[0068] [Table 1]

[0069] The surface temperature of the heat source measured with a thermal camera was 198°C. The surface temperature of the pressure-sensitive adhesive tape according to Example 1 was 138°C, and the surface temperature of the sheet according to Comparative Example 1 was 149°C. This demonstrates that the pressure-sensitive adhesive tape according to Example 1 exhibits excellent heat resistance even when directly attached to a heat source, and is also superior in heat insulation to Comparative Example 1.

[0070] Comparative Example 1 is a sheet containing only silicone resin and having a porosity of 0%. In contrast, the adhesive tape of Example 1 has a porous silicone resin layer, glass cloth, and adhesive layer all with high heat resistance temperatures, and the porous silicone resin layer contains many bubbles. This is thought to be why it was able to achieve both excellent heat resistance and heat insulation.

[0071] Next, the relationship between the thickness of the porous silicone resin layer and the heat insulating property was tested as follows.

[0072] Example 2 The adhesive tape of Example 2 was produced in the same manner as Example 1, except for the following.

[0073] First, in the preparation of the raw material solution, the ratio of the blowing agent to the raw material solution was set to 3 mass%. In applying the raw material solution to the glass cloth, the thickness of the coating was adjusted so that the thickness of the resulting adhesive tape was 0.7 mm. In addition, in order to test the relationship between the thickness of the porous silicone resin layer and the heat insulating property, the formation of the adhesive layer was omitted.

[0074] Examples 3 to 5 An adhesive tape was prepared in the same manner as in Example 2, except that when applying the raw material liquid to the glass cloth, the thickness of the coating film was adjusted so that the thickness of the resulting adhesive tape would be the value shown in Table 2.

[0075] Example 6 The adhesive tape of Example 6 was produced in the same manner as in Example 2, except for the following.

[0076] First, in the production of the raw material liquid, the ratio of the blowing agent to the raw material liquid was set to 5% by mass. In applying the raw material liquid to the glass cloth, the thickness of the coating film was adjusted so that the thickness of the resulting adhesive tape would be 1.0 mm.

[0077] (Examples 7 and 8) An adhesive tape was prepared in the same manner as in Example 6, except that when applying the raw material liquid to the glass cloth, the thickness of the coating film was adjusted so that the thickness of the resulting adhesive tape would be the value shown in Table 2.

[0078] Example 9 The adhesive tape of Example 9 was produced in the same manner as in Example 2, except for the following.

[0079] First, in the production of the raw material liquid, the ratio of the blowing agent to the raw material liquid was set to 7 mass %. In applying the raw material liquid to the glass cloth, the thickness of the coating film was adjusted so that the thickness of the resulting adhesive tape would be 1.3 mm.

[0080] (Examples 10 and 11) An adhesive tape was prepared in the same manner as in Example 9, except that when applying the raw material liquid to the glass cloth, the thickness of the coating film was adjusted so that the thickness of the resulting adhesive tape would be the value shown in Table 2.

[0081] (Measurement method) First, the heat insulating performance of the pressure-sensitive adhesive tapes according to Examples 2 to 11 was measured in the same manner as the heat insulating performance of the sheet according to Comparative Example 1. The difference between the surface temperature of the heat source and the surface temperature of the pressure-sensitive adhesive tape obtained for each of Examples 2 to 11 was calculated and defined as the adiabatic temperature (°C). The adiabatic temperature (°C) serves as an index of the heat insulating performance. The adiabatic temperatures (°C) of Examples 2 to 11 are shown in Table 2.

[0082] [Table 2]

[0083] The data for each example shown in Table 2 is also summarized in a graph. In Fig. 2, the vertical axis represents the adiabatic temperature (°C) and the horizontal axis represents the thickness (mm) of the adhesive tape. In Fig. 2, graph a represents the adiabatic temperature and adhesive tape thickness for Examples 2 to 5, in which the amount of foaming agent added was 3% by mass. Graph b represents the adiabatic temperature and adhesive tape thickness for Examples 6 to 8, in which the amount of foaming agent added was 5% by mass, and graph c represents the adiabatic temperature and adhesive tape thickness for Examples 9 to 11, in which the amount of foaming agent added was 7% by mass.

[0084] Furthermore, Examples 2 to 5 shown in graph a are pressure-sensitive adhesive tapes produced in the same manner except for varying the thickness of the porous silicone resin layer. Examples 6 to 8 shown in graph b and Examples 9 to 11 shown in graph c are pressure-sensitive adhesive tapes produced in the same manner except for varying the thickness of the porous silicone resin layer.

[0085] In all of graphs a, b, and c, the insulating temperature tended to increase as the thickness of the adhesive tape increased.

[0086] These results demonstrate that the thicker the porous silicone resin layer, the higher the heat insulating properties. Therefore, it is clear that increasing the thickness of the porous silicone resin layer in a pressure-sensitive adhesive tape can improve the heat insulating properties of the pressure-sensitive adhesive tape.

[0087] Furthermore, the relationship between the amount of foaming agent added and the heat insulating performance was tested as follows.

[0088] Example 12 An adhesive tape was produced in the same manner as in Example 6, except that in applying the raw material liquid to the glass cloth, the thickness of the coating was adjusted so that the thickness of the resulting adhesive tape would be 1.3 mm. Also, as in Example 6, the formation of an adhesive layer was omitted. This was to test the relationship between the amount of foaming agent added to the raw material liquid and heat insulating properties. This adhesive tape was used as a sample with a foaming agent addition amount of 5%.

[0089] (Comparative Example 2) An adhesive tape was produced in the same manner as in Example 12, except that no foaming agent was added to the raw material liquid in producing the raw material liquid. This adhesive tape was used as a sample with 0% foaming agent added (blank).

[0090] Furthermore, the adhesive tape of Example 4 was prepared as a sample containing 3% of the foaming agent, and the adhesive tape of Example 9 was prepared as a sample containing 7% of the foaming agent.

[0091] Subsequently, the heat insulating performance of the pressure-sensitive adhesive tapes of Examples 4, 9, and 12, and Comparative Example 2 was measured in the same manner as that of the sheet of Comparative Example 1, and the heat insulating temperature (°C) was calculated. The results are shown in Table 3.

[0092] [Table 3]

[0093] The data for each example and comparative example shown in Table 3 are summarized in a graph. The adiabatic temperatures (°C) for Examples 4, 9, and 12, and Comparative Example 2 are shown in Figure 3. Note that Figure 3 shows the data arranged from the left in ascending order of the amount of blowing agent added to the raw material liquid.

[0094] That is, in FIG. 3, from the left, Comparative Example 2 is shown as "blank," Example 4 as "3%," Example 12 as "5%," and Example 9 as "7%."

[0095] Examples 4, 9, and 12, and Comparative Example 2 are pressure-sensitive adhesive tapes produced in the same manner, except that the amount of foaming agent added to the raw material liquid was changed. Comparing these Examples and Comparative Examples, as shown in Figure 3, there was a tendency for the heat insulating performance to increase as the amount of foaming agent added to the raw material liquid increased. This is thought to be because the porosity of the porous silicone resin layer contained in the pressure-sensitive adhesive tape increases as the amount of foaming agent added to the raw material liquid increases, resulting in improved heat insulating performance.

[0096] From the above results, it became clear that in an adhesive tape, increasing the porosity of the porous silicone resin layer can improve the heat insulating properties of the adhesive tape.

[0097] Therefore, it has become clear that the embodiment can provide a pressure-sensitive adhesive tape with high heat insulating properties.

[0098] The present invention is not limited to the above-described embodiments, and various modifications can be made in the implementation stage without departing from the spirit of the invention. Furthermore, the embodiments may be implemented in appropriate combinations, in which case the combined effects can be obtained. Furthermore, the above-described embodiments include various inventions, and various inventions can be extracted by combining selected elements from the disclosed elements. For example, if the problem can be solved and the desired effect can be obtained even if some elements are deleted from all elements shown in the embodiments, the configuration from which these elements are deleted can be extracted as an invention. [Explanation of symbols]

[0099] 1...porous silicone resin layer, 2...glass cloth, 3...adhesive layer, 10...adhesive tape, 21...glass fiber, 22...first surface, 23...second surface.

Claims

1. The device includes a glass cloth having a first surface and a second surface, a porous silicone resin layer provided on the first surface, and an adhesive layer provided on the second surface, The adhesive layer of the adhesive tape contains a silicone-based adhesive.

2. 2. The pressure-sensitive adhesive tape according to claim 1, wherein the porous silicone resin layer has a thickness of 0.2 mm or more.

3. 3. The pressure-sensitive adhesive tape according to claim 1, wherein the porous silicone resin layer has a porosity of 40% or more and 80% or less.

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