JP2002338309A - Electromagnetic wave shielding multilayer glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic wave shielding multilayer glass which maintains a high electromagnetic wave shielding performance even at the curing shrinkage of sealant and the change of internal pressure in the multilayer glass. SOLUTION: In this electromagnetic wave shielding multilayer glass 10, a transparent conductive film 14 is deposited on the inner surface of at least one sheet of plate glass 12 between at least two sheets of plate glasses 11, 12, the two sheets of plate glasses 11, 12 are opposite to each other with an interposed spacer 13, the gap among the plate glasses 11, 12 and the spacer 13 is filled with the first sealant 15 and the peripheral void formed by the opposed plate glasses 11, 12 and the spacer 13 is filled with the second sealant 16. Therein, further, a conductive covering material 18 is attached to the peripheral part of the two sheets of plate glasses 11, 12, a conductive cloth tape 17 which is connected with the periphery of the transparent conductive film 14 and the second sealant 16 is stuck to the edge of the plate glass 12 and the transparent conductive film 14 is electrically conducted with the conductive covering material 18 via the conductive cloth tape 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic shielding double glass, and more particularly to an electromagnetic shielding double glass attached to an opening of a building.

[0002]

2. Description of the Related Art In recent years, in buildings such as hotels and hospitals, cordless extension telephones are planned, and electromagnetic waves are often used for information communication in buildings. In such a case, electromagnetic waves entering from the window glass may cause noise sources and interference to information communication devices used inside the building, and electromagnetic waves coming out of the window glass may cause noise to information communication devices used outside. Sources and interference. Therefore, it is important to use an electromagnetic shield that prevents electromagnetic waves from entering the outside of other buildings, etc., and does not emit electromagnetic waves to the outside of other buildings. Need to secure.

As a means for ensuring an electromagnetic wave shielding function in an opening of a building, a multi-layered electromagnetic wave shielding glass structure having translucency is disclosed in Japanese Utility Model Laid-Open Publication No. 3-83996. Its structure is that at least two glass plates,
With a spacer interposed therebetween, the peripheral end face is sealed with a sealing material, and disposed opposite to each other to form a multi-layer vitreous, and a conductive coating material is integrally provided on a peripheral portion of the multi-layer glass, and at least one sheet is provided. A transparent conductive film is disposed on the other surface of the glass plate facing the other glass plate, and the transparent conductive film is electrically connected to the conductive coating material.

Further, in this electromagnetic wave shielding multilayer glass structure, a transparent conductive film having a high visible light transmittance formed on the glass surface of the multilayer glass is electrically connected to a conductive coating material covering a peripheral portion of the multilayer glass. For this purpose, a conductive layer covering the periphery of the transparent conductive film is provided, and this conductive layer has an adhesive layer in which a suitable amount of conductive powder of carbon or nickel is mixed in a metal foil of aluminum, copper, stainless steel or the like.

[0005] Thus, the electromagnetic wave reaching the glass surface can be grounded via the conductive coating material via the transparent conductive film, and an electromagnetic shielding effect can be imparted.

[0006]

However, in such an electromagnetic wave shielding multilayer glass structure, since the conductive layer is made of metal foil, the adhesive strength between the metal foil and the sealing material is limited by the metal foil and the transparent conductive material. Since the metal foil, which is a conductive layer, is stressed due to, for example, curing shrinkage of the sealing material due to a stronger adhesive force with the film, the metal foil as the conductive layer is easily peeled off at the bonding portion between the metal foil having a weak adhesive force and the transparent conductive film. Therefore, when the curing shrinkage of the sealing material or the change in the internal pressure of the double-glazing occur, the separation occurs at the bonding portion between the conductive layer made of metal foil and the transparent conductive film. Cannot be grounded, and it is difficult to maintain high electromagnetic wave shielding performance.

Further, since the metal foil is used for the conductive layer, wrinkles and gaps are easily generated when the metal foil is attached to a transparent conductive film or a covering material, and repair is difficult.
In addition, the presence of the gap makes it easier for electromagnetic waves to pass. Further, rainwater and dew condensation water may enter through the gap to accelerate the deterioration of the sealing material. As described above, when the metal foil is used for the conductive layer, it is difficult to finish the application of the metal foil to the periphery of the glass, and there is a problem that the electromagnetic wave shielding performance and the durability of the multi-layer glass are easily reduced.

[0008] An object of the present invention is to solve the above-mentioned problems by maintaining adhesion between the transparent conductive film and the conductive layer even by curing shrinkage of the sealing material or a change in the internal pressure of the double-glazed glass. It is an object of the present invention to provide an electromagnetic shielding double glass that maintains a high electromagnetic shielding performance that can be easily finished at the time of sticking to a glass or the periphery of the glass.

[0009]

The electromagnetic wave shielding double glazing according to the present invention is constituted as follows in order to achieve the above object.

The first electromagnetic wave shielding double-glazed glass (corresponding to claim 1) has a transparent conductive film deposited on the inner surface of at least one of the at least two glass sheets.
An electromagnetic wave in which two glass sheets are opposed to each other with a spacer interposed therebetween, a first sealing material is embedded in a gap between the glass sheet and the spacer, and a second sealing material is embedded in a peripheral gap formed by the opposed glass sheet and the spacer. In the shielding double-glazed glass, a conductive coating material is attached to the periphery of the two glass sheets, and a conductive cloth tape bonded to the periphery of the transparent conductive film and the second sealing material is attached to the edge of the glass sheet. It is characterized in that the transparent conductive film is electrically connected to the conductive coating material via the conductive cloth tape.

[0011] According to the first electromagnetic wave shielding double glazing, 2
A conductive coating material is attached to the periphery of the sheet glass,
A conductive cloth tape bonded to the periphery of the transparent conductive film and the second sealant was attached to the edge of the plate glass, and the transparent conductive film was electrically connected to the conductive coating material via the conductive cloth tape. Even if a load is applied to the adhesive surface due to curing shrinkage of the next sealing material or a change in the internal pressure of the double-glazing, the transparent conductive film and the conductive cloth tape do not peel off, and the electromagnetic wave shielding performance can be maintained.

In addition, wrinkles and gaps are not easily generated when the conductive cloth tape is attached, and the electromagnetic wave shielding performance and the durability of the multi-layer glass are not easily reduced. Furthermore, since the material is hardly torn during transportation and construction, the radio wave shielding performance and the durability of the double glazing are not easily reduced.

[0013] In the above structure, the second electromagnetic wave shielding multilayer glass (corresponding to claim 2) is preferably such that the conductive cloth tape has an adhesive force with the second sealing material and an adhesive force with the transparent conductive film. It is characterized by having a weaker adhesive strength than that.

The third electromagnetic wave shielding double glazing (corresponding to claim 3) is preferably such that the conductive cloth tape is formed by integrating a conductive adhesive and a conductive cloth plated with polyester fiber or acrylic fiber. It is characterized by comprising.

According to the third electromagnetic wave shielding multilayer glass, the conductive cloth tape is obtained by integrating the conductive adhesive and the conductive cloth plated with polyester fiber or acrylic fiber, so that it can be easily obtained at low cost. be able to.

The fourth electromagnetic wave shielding double glazing (corresponding to claim 4) is preferably such that the conductive cloth tape is formed by integrating a conductive cloth made of a conductive adhesive and a metal fiber. It is characterized by becoming.

According to the fourth electromagnetic wave shielding multilayer glass, since the conductive cloth tape is formed by integrating a conductive cloth made of a metal fiber, the durability is excellent.

The fifth electromagnetic wave shielding double glass (corresponding to claim 5) in the above structure, preferably, the conductive coating material is made of a conductive cloth tape having a resin-coated portion in contact with the joint sealing material. It is characterized by

According to the fifth electromagnetic wave shielding double glazing, since the conductive covering material is made of a conductive cloth tape coated with resin at a portion in contact with the joint sealing material, contact with other members during transportation or construction is possible. The coating material is less likely to be torn by such factors.

[0020]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of an electromagnetic wave shielding double glass according to a first embodiment of the present invention. In the electromagnetic wave shielding double-glazed glass 10, two glass sheets, an outdoor glass 11 and an indoor glass 12, are opposed to each other so that a gap is formed by a spacer 13. On the inner surface of the indoor glass 12,
A transparent conductive film 14 has been deposited. The gap between the spacer 13 and the outdoor glass 11, the spacer 13 and the indoor glass 12
Is sealed with a first sealing material 15
A gap formed at the periphery between the outdoor glass 11, the indoor glass 12, and the spacer 13 is sealed with a second sealant 16. The conductive cloth tape 17 bonded to the periphery of the transparent conductive film 14 by making electrical contact therewith is applied to the indoor glass 12.
And the conductive coating material 18 is attached to the periphery of the two indoor glass 12 and the exterior glass 11 and the second sealing material 16.
And is electrically bonded to the conductive cloth tape 17 so as to be adhered. In the spacer 13, the desiccant 1
9 is inserted. The electromagnetic wave shielding multilayer glass 10 thus formed is attached to a window frame (not shown), and a backup material (not shown) is provided in a gap between the window frame and the electromagnetic shielding multilayer glass 10, and a conductive joint (not shown) is provided. Used by sealing with a sealing material.

The indoor glass 12 is made of glass with a transparent conductive film, and the surface resistance of the transparent conductive film 14 is 15 Ω / □.
Use the following. Thereby, the obtained electromagnetic wave shielding multilayer glass 10 can shield electromagnetic waves well. Further, the transparent conductive film 14 is preferably a material that is hardly corroded because the second sealant 16 has water permeability. For example, a fluorine-doped tin oxide film or an ITO film is used, and these transparent conductive films are deposited by a CVD (chemical vapor deposition) method, a sputtering method, a vacuum evaporation method, a dipping method, or the like.

The outdoor glass 11 includes a normal sheet glass,
General glass such as heat ray absorbing glass, meshed glass, and tempered glass is used. When higher electromagnetic wave shielding performance is required, glass with a transparent conductive film can be used for the outdoor glass 11 as well. Even higher shielding performance can be obtained by using a transparent conductive film having a low surface resistance of 5Ω / □ or less. When a transparent conductive film that is easily corroded by moisture is used, the second sealing material 1
It is preferable that the portion in contact with 6 be removed.

The first sealing material 15 is made of the outdoor glass 11.
It is for sealing the gap between the inside glass 12 and the spacer 13 and the space between the inside glass 12 and the spacer 13, and is preferably a glass having a high water resistance, which is used for ordinary double glazing. As a material to be used, for example, polyisobutylene is suitable.

The second sealing material 16 is made of the outdoor glass 11.
The space between the two glass sheets of the electromagnetic wave shielding double glazing 10 is structurally maintained by filling a gap formed on the peripheral edge between the inner glass 12 and the spacer 13. For this reason, a durable material is used, and a material used for ordinary double-glazing is used. The materials used are silicone,
Sealants such as polyurethane, hot melt butyl, and polysulfide are suitable.

The spacer 13 is for holding the outdoor glass 11 and the indoor glass 12 with a space therebetween, and is made of a usual double-glazing. In order to prevent accumulation of moisture, an aluminum spacer or the like in which a desiccant 19 is sealed in a hollow portion is used.

The conductive covering material 18 covers at least a part of the periphery of the indoor glass 12 and is used for grounding the transparent conductive film 14 through the conductive cloth tape 17 and is conductive. Further, the adhesive strength to the joint sealing material (not shown) is higher than the adhesive strength to the glass, and the wind pressure is applied to the installed electromagnetic wave shielding multilayer glass 10 and the window frame (not shown) and the outside glass 11 and the room It is necessary not to peel off due to a load on a joint sealing material (not shown) generated due to a difference in thermal expansion and contraction of the inner glass 12. For example, a tape of a metal foil such as an aluminum foil is used.

The joint sealing material (not shown) is for sealing a gap between the window frame and the electromagnetic wave shielding double glazing 10 and for grounding a current from the conductive coating material 18. Yes, it is necessary to have conductivity. Therefore, the material to be used is a conductive silicone sealing material or the like.

The conductive cloth tape 17 is for electrically connecting the transparent conductive film 14 to the conductive coating material 18 and forms a conductive layer. Therefore, it is necessary to maintain the electrical contact with the transparent conductive film 14 and the electrical contact with the conductive coating material 18. Therefore, in the present invention, the conductive cloth tape 17 described below is used.

FIG. 2 is a front view (a) and a sectional view (b) of the conductive cloth tape used in the present invention, and FIG. 3 is an enlarged view of a fiber constituting the conductive cloth tape. The fibers of the conductive cloth tape 17 are obtained by plating a metal 21 on a polyester fiber 20, and the conductive cloth 22 of the conductive cloth tape 17 is formed by plating a metal in a polyester-like state. It may be a material obtained by plating a metal on a polyester fiber thread and finishing the cloth. As a metal for plating, silver, copper, zinc, nickel may be used alone, or a combination of these metal platings may be used. A conductive adhesive 23 is applied to the conductive cloth, and forms a conductive cloth tape 17. Conductive adhesive 2
3 uses an adhesive mixed with a conductive powder such as nickel or silver. Thereby, the conductivity of the whole conductive cloth tape is obtained.

By mounting the electromagnetic wave shielding multilayer glass 10 having the above-described configuration in an opening of a building, when an electromagnetic wave enters the electromagnetic wave shielding multilayer glass 10 from inside or outside the room, it is deposited on the inner surface of the indoor glass 12. Transparent conductive film 1
4, the electromagnetic wave is not transmitted but shielded on the side opposite to the incident side. The transparent conductive film 14 may be grounded to a window frame side (not shown) through a conductive covering material 18 and a joint sealing material (not shown) through a conductive cloth tape 17 electrically connected to the transparent conductive film 14 by being bonded thereto. it can. Thereby, the electromagnetic wave shielding multilayer glass 10 can efficiently shield electromagnetic waves.

Next, when the conductive cloth tape 17 is used as a conductive layer, the conductive cloth tape 17 and the transparent conductive film 14 are used.
In order to consider the adhesive force between the metal foil and the second sealing material 16, first, the adhesive force between the metal foil and the transparent conductive film 14 and the second sealing material 16 when a metal foil is used for the conventional conductive layer will be described. I do. FIG. 4A shows that a metal foil 2 is formed on the conductive layer.
4 is an enlarged view of the vicinity of the metal foil 24 immediately after the metal foil 24 is attached to the transparent conductive film 14 and the second sealing material 16 is sealed. At this time, the metal foil 24 is adhered to the transparent conductive film 14 and the second sealant 16 in a flat state.

FIG. 4B is an enlarged view of the vicinity of the metal foil 24 when the second sealing material 16 has been sealed and the second sealing material 16 has hardened. At this time, the second sealing material 16 is hardened and contracts. Second sealing material 1
Since the metal foil 24 is strongly adhered to the entire surface of the metal film 6, the metal foil 24 is pulled by the contraction of the second sealing material 16, and the minute gap 2 is partially formed between the metal foil 24 and the transparent conductive film 14.
5, the bonding area between the metal foil 24 and the transparent conductive film 14 is reduced as compared to immediately after the second sealing material 16 is sealed. Therefore, it becomes a factor of deteriorating the electromagnetic wave shielding performance.

Next, the adhesive force between the transparent conductive film 14 and the conductive cloth tape 17 when the conductive cloth tape 17 is used for the conductive layer, and the adhesive force between the second sealant 16 and the conductive cloth tape 17 Will be described. The conductive cloth tape 17 is made of metal foil 24
Since the surface of the second sealing material 16 is more viscous than that of the second sealing material 16, the contact area between the surface of the conductive cloth tape 17 and the second sealing material 16 decreases, Has a reduced adhesive strength. Therefore, the adhesive force between the transparent conductive film 14 and the conductive cloth tape 17 is larger than the adhesive force between the second sealant 16 and the conductive cloth tape 17. As a result, even if a stress is applied to the bonded portion due to a change in the internal pressure of the electromagnetic wave shielding multilayer glass 10, the transparent conductive film 1
4 is maintained in electrical contact with the conductive cloth tape 17, the ground through the conductive coating material 18 is kept good through the conductive cloth tape 17 from the transparent conductive film 14, and the electromagnetic wave shielding performance is maintained. Can be.

Actually, a test was conducted on the adhesive force of the conductive cloth tape 17 using silicone as the second sealant 16. Table 1 shows the results. This test is based on JIS
The adhesive strength was measured by a tensile test specified in A5758 (sealing material for building). When a conventional aluminum foil tape with a conductive adhesive is used as the conductive layer, the initial maximum tensile strength is 3.1 Kg / cm ² , and the transparent conductive film 1
Breakdown occurred between No. 4 and the conductive layer adhesive. When using a conductive cloth tape, which is a polyester cloth plated with copper and nickel instead of aluminum foil, as the conductive layer,
The initial maximum tensile strength was 2.1 kg / cm ² , and breakage occurred between the conductive cloth tape and the second sealing material 16. In addition, when a conductive cloth tape coated with transparent acrylic by applying a copper / nickel plating to a polyester cloth as a conductive layer is used, the initial maximum tensile strength is 3.1 Kg / cm ² , and the transparent conductive film and the conductive film are electrically conductive. Breakage occurred with the cloth tape adhesive.

[0036]

[Table 1]

As described above, as a result of the tensile test, when a metal foil is used as the conductive layer, destruction occurs between the transparent conductive film and the adhesive of the conductive layer, but the conductive cloth tape is used as the conductive layer. It was found that this occurred between the conductive cloth tape and the second sealing material 16.

As described above, the conductive cloth tape 17 is
Can be made smaller than the adhesive strength with the transparent conductive film 14 even if the load on the adhesive surface due to a change in the internal pressure of the electromagnetic wave shielding multilayer glass 10 is applied. 14 and the conductive cloth tape 17 do not peel off, and the electromagnetic wave shielding performance can be maintained. Further, since the conductive cloth tape 17 has a high tensile strength and is hard to be broken, the material is hardly broken during transportation and construction, so that the electromagnetic wave shielding performance and the durability are hardly reduced. Further, when the conductive cloth tape 17 is used, finishing is easy, and wrinkle gaps are hardly generated, and as a result, electromagnetic wave performance and durability are not easily reduced.

Also, since the conductive cloth tape 17 is flexible, even when curved glass is used for the indoor glass 12 and the outdoor glass 11, the conductive cloth tape 17 is a transparent conductive tape having a curved surface. Since it adheres well to the film 14, better electromagnetic wave shielding performance can be maintained than when the metal foil 24 is used.

In this embodiment, polyester is used as the fiber of the conductive cloth 22, but it is also possible to use acrylic fiber plated.

Further, the conductive cloth tape 17 may be formed from a cloth using metal fibers, and metal wire nets of various materials can be used. Also at this time, the conductive cloth tape 17 can be used as a conductive layer due to the conductivity of the metal.

FIG. 5 is a sectional view of an electromagnetic shielding double glass according to a second embodiment of the present invention. This is one in which a transparent conductive film 26 is provided on the inner surface of the outdoor glass 11. The outdoor glass 11 is a glass with a transparent conductive film including two Ag layers, and the surface resistance value of the transparent conductive film 26 is 5Ω /.
□. The indoor glass 12 is a glass with a transparent conductive film including a SnO ₂ layer, and the transparent conductive film 14 having a surface resistance of 10 to 15 Ω / □ is used. As other materials, those used in the first embodiment are used. With this configuration, it was possible to achieve an electromagnetic wave shielding performance of 30 dB or more in an electromagnetic wave of 100 MHz to 3 GHz.

FIG. 6 is a sectional view of an electromagnetic shielding double glass according to a third embodiment of the present invention. This uses a stepped laminated glass 27 for the indoor glass.
The stepped laminated glass 27 is a combination of the first glass 28 and the second glass 29, and has one surface of the first glass and the second glass 29.
Transparent conductive films 30, 31 are deposited on one side of the glass,
The first glass 28 and the second glass 29 are combined in such a size that a step is formed when the first glass 28 and the second glass 29 are combined. On the periphery of the laminated glass, the transparent conductive film 30 of the first glass 28
The conductive cloth tape 17 is attached so that an electrical connection is formed between the transparent conductive film 31 and the second glass 29. Outdoor glass 11, spacers 13, sealing materials 15, 16,
As the conductive covering material 18, the same material as that used in the second embodiment is used.

The electromagnetic waves incident on the electromagnetic wave shielding double-glazed glass are applied to the transparent conductive films 30 and 31 of the stepped laminated glass 27.
Therefore, a higher-performance shielding effect can be obtained.

FIG. 7 is a sectional view of an electromagnetic wave shielding double glass according to a fourth embodiment of the present invention. FIG. 7 shows a window frame 32, a joint sealing material 33, a backup material 34, and a metal mesh 35 for grounding, in addition to the electromagnetic wave shielding double-glazing.
Are also shown. In this electromagnetic wave shielding double glazing, a conductive cloth tape coated with a resin is used as the conductive coating material 36.

Since the portion to be bonded to the joint sealing material 33 is coated with a resin, as shown in Table 1, the resin coating applied to the conductive cloth tape increases the adhesive strength with the sealing material. , Joint sealing material 3
3 and a conductive covering material 36 made of a conductive cloth tape are strengthened. Further, since the conductive cloth tape is less likely to be torn than the metal foil, it is less likely to be broken due to contact with other members during transportation or construction. Therefore, the durability of the electromagnetic wave shielding double glass can be improved.

[0047]

As apparent from the above description, the present invention has the following effects.

A conductive covering material is attached to the periphery of the two glass sheets, and a conductive cloth tape bonded to the periphery of the transparent conductive film and the second sealant is attached to the edge of the glass sheet. Even if a load is applied to the bonding surface due to the shrinkage in curing of the secondary sealing material and the change in the internal pressure of the double-glazing,
The transparent conductive film and the conductive cloth tape do not peel off, and the electromagnetic wave shielding performance can be maintained. Also, wrinkles and gaps are less likely to occur when attaching the conductive cloth tape,
Electromagnetic wave shielding performance and durability of double glazing are not easily reduced.
Furthermore, since the material is hardly torn during transportation and construction, the radio wave shielding performance and the durability of the double glazing are not easily reduced. In addition, since the conductive cloth tape is formed by integrating a conductive adhesive and a conductive cloth made of a metal fiber or a conductive cloth plated with polyester fiber or acrylic fiber, the tape can be easily obtained at low cost. . In addition, since the conductive covering material is made of a conductive cloth tape in which a portion in contact with the joint sealing material is resin-coated, the covering material is unlikely to be broken due to contact with other members during transportation or construction.

[Brief description of the drawings]

FIG. 1 is a sectional view of an electromagnetic wave shielding double glazing according to a first embodiment of the present invention.

FIG. 2 is (a) a front view and (b) a cross-sectional view of a conductive cloth tape used in the present invention.

FIG. 3 is an enlarged view of a fiber constituting a conductive cloth tape.

FIG. 4 shows (a) a portion immediately after the second sealing material is sealed in a bonding portion between the metal foil, the transparent conductive film, and the second sealing material;
(B) It is an enlarged view when the second sealing material is cured and shrunk after the second sealing material is sealed.

FIG. 5 is a cross-sectional view of an electromagnetic shielding double glass according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of an electromagnetic wave shielding double glass according to a third embodiment of the present invention.

FIG. 7 is a sectional view of an electromagnetic shielding double glass according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electromagnetic wave shielding double glass 11 Outdoor glass 12 Indoor glass 13 Spacer 14 Transparent conductive film 15 First seal material 16 Second seal material 17 Conductive cloth tape 18 Conductive coating material 19 Desiccant

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Murata 4-7-28 Kitahama, Chuo-ku, Osaka-shi Nippon Sheet Glass Co., Ltd. (72) Inventor Motoyasu Togashi 1-1-11-11 Shiba, Minato-ku, Tokyo Japan Sheet Glass Environmental Amenity Co., Ltd. (72) Inventor Yasushi Hoshino 1-11-11 Shiba, Minato-ku, Tokyo Japan Sheet Glass Environmental Amenity Co., Ltd. F-term (reference) 4G061 AA29 BA01 CB02 CD02 CD24 CD27

Claims (5)

[Claims] 1. A transparent conductive film is deposited on an inner surface of at least one plate glass of at least two plate glasses, and the two plate glasses are opposed to each other with a spacer interposed therebetween. In the electromagnetic shielding multilayer glass in which the first sealing material is embedded in the gap of the above, and the second sealing material is embedded in the peripheral gap formed by the facing glass sheet and the spacer, A conductive cloth material is attached, a conductive cloth tape bonded to a periphery of the transparent conductive film and the second sealant is attached to an edge of the plate glass, and the transparent conductive film is taped through the conductive cloth tape. Is electrically conductive with the conductive coating material. 2. The electromagnetic wave shield according to claim 1, wherein the conductive cloth tape has an adhesive force with the second sealing material that is weaker than that with the transparent conductive film. Double glazing. 3. The electromagnetic shielding double-glazed glass according to claim 2, wherein the conductive cloth tape is formed by integrating a conductive adhesive and a conductive cloth plated with polyester fiber or acrylic fiber. 4. The electromagnetic shielding double glass according to claim 2, wherein the conductive cloth tape is formed by integrating a conductive adhesive made of a conductive adhesive and a metal fiber. 5. The double-layered electromagnetic wave shielding glass according to claim 1, wherein the conductive covering material is made of a conductive cloth tape coated with a resin at least at a portion in contact with the joint sealing material.