WO2010055787A1 - 電磁遮蔽合わせガラス - Google Patents

電磁遮蔽合わせガラス Download PDF

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Publication number
WO2010055787A1
WO2010055787A1 PCT/JP2009/068757 JP2009068757W WO2010055787A1 WO 2010055787 A1 WO2010055787 A1 WO 2010055787A1 JP 2009068757 W JP2009068757 W JP 2009068757W WO 2010055787 A1 WO2010055787 A1 WO 2010055787A1
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Prior art keywords
glass
laminated glass
electromagnetic shielding
film
films
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PCT/JP2009/068757
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English (en)
French (fr)
Inventor
正昭 片野
健一 菅原
一美 加藤
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セントラル硝子株式会社
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Publication of WO2010055787A1 publication Critical patent/WO2010055787A1/ja

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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E06B5/18—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against harmful radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10376—Laminated safety glass or glazing containing metal wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0001—Rooms or chambers
    • H05K9/0005—Shielded windows

Definitions

  • the present invention relates to an electromagnetic shielding glass having a laminated glass structure mounted on an opening of an intelligent building, and more particularly to an electromagnetic shielding laminated glass having high electromagnetic shielding performance in a frequency range of 10 MHz to 20 GHz.
  • Electromagnetic waves generated by many of these electronic devices / devices cause other electronic devices and electronic control devices to malfunction. It also causes noise.
  • electromagnetic waves that enter from the opening may cause malfunction of electronic devices in the building.
  • electromagnetic waves that exit from the opening may cause an external electronic device or the like to malfunction.
  • a conductive mesh and a conductive film are inserted between the interlayer films, the conductive mesh and the conductive film are bent to the surface of the laminated glass at the edge of the glass, Furthermore, the electromagnetic shielding glass by which the electroconductive mesh and the electroconductive film are being fixed to the edge part of a laminated glass with the electroconductive tape is disclosed.
  • the conductive film a film formed with a metal film or an ITO (Indium Tin Oxide) film is used (Patent Document 2).
  • an electromagnetic shielding glass having a laminated glass structure in which a conductive mesh body is inserted between two intermediate films and has a shielding performance of 50 to 65 dB in a frequency range of 1 MHz to 30 MHz Patent Document 3.
  • the electromagnetic shielding performance disclosed is about 70 dB in the frequency range of 0.1 MHz to 20 GHz (Patent Document 4).
  • An electromagnetic shielding glass with a multi-layer glass structure in which a laminated glass in which one metal net is inserted between two intermediate films and a combination in which two metal nets are inserted into two intermediate films use a last. Discloses an electromagnetic shielding performance of about 70 to 95 dB in a frequency range of 0.1 MHz to 1 GHz (Patent Document 5).
  • the shielding performance is about 60 to 70 dB over 0.1 MHz to 20 GHz with an electromagnetic shielding multiple glass using two 65 to 150 mesh conductive nets (Patent Document 6).
  • Patent Document 7 Japanese Patent Laid-Open No. 11-312893 Japanese Patent Laid-Open No. 10-322083 JP 2001-177291 A JP 2000-183586 Japanese Patent Laid-Open No. 9-321484 Japanese Unexamined Patent Publication No. 2000-183584 JP 2004-346555 A
  • This invention makes it a subject to provide the electromagnetic shielding laminated glass which has sufficient electromagnetic shielding performance with respect to such a condition.
  • the electromagnetic shielding laminated glass according to the present invention is an electromagnetic shielding laminated glass in which a metal net is inserted between glasses of laminated glass, and the metal net is inserted between two intermediate films.
  • a metal net is inserted between glasses of laminated glass, and the metal net is inserted between two intermediate films.
  • the electromagnetic shielding laminated glass is characterized in that laminated interlayer films are alternately laminated to form a laminated glass, and a conductive film is formed on an air side surface of a glass plate located outside.
  • the electromagnetic shielding laminated glass according to the present invention is an electromagnetic shielding laminated glass characterized in that, in the electromagnetic shielding laminated glass, a glass plate used in the center of the laminated glass has a thickness of 3 to 20 mm.
  • the electromagnetic shielding laminated glass according to the present invention is an electromagnetic shielding laminated glass characterized in that, in the electromagnetic shielding laminated glass, the glass used on the outside of the laminated glass has a thickness of 3 to 10 mm.
  • the electromagnetic shielding laminated glass according to the present invention is the electromagnetic shielding laminated glass, wherein the conductive film is made of tin oxide.
  • the electromagnetic shielding laminated glass according to the present invention is the electromagnetic shielding laminated glass according to the electromagnetic shielding laminated glass, wherein the metal net is 50 to 150 mesh.
  • the electromagnetic shielding laminated glass according to the present invention makes it possible to provide a high-performance electromagnetic shielding laminated glass corresponding to a wide frequency range.
  • the schematic sectional drawing which shows the structure of the electromagnetic shielding laminated glass which concerns on this invention.
  • the schematic sectional drawing of the edge part of the electromagnetic shielding laminated glass shown in FIG. The schematic sectional drawing of the electromagnetic shielding glass of a multilayer glass structure which made the conductive member into 4 layers.
  • the electromagnetic shielding laminated glass according to the present invention is an electromagnetic shielding laminated glass having a configuration of a laminated glass 1 produced using three glass plates 10, 11, and 12 as shown in FIG.
  • inorganic glass plates such as soda-lime-silica glass are used.
  • float glass manufactured by a float process or tempered glass reinforced with float glass is preferably used. It is done.
  • float glass having a thickness of 3 mm or more and 20 mm or less used for construction is preferably used.
  • a glass plate having a thickness of 3 to 10 mm is preferable for the glass plates 10 and 12 used on the outside, and a glass plate having a thickness of 3 to 20 mm is preferable for the glass plate 11 used for the center.
  • 12 is preferably a glass plate having a thickness of 5 to 10 mm, and the glass plate 11 used in the center is preferably a glass plate having a thickness of 6 to 15 mm.
  • the glass plates 10, 11, 12 are integrated by the two-layer intermediate films 15, 16, and constitute the laminated glass 1 from the above.
  • conductive films 41 and 42 are formed on one side of the glass plates 10 and 12, and the conductive films 41 and 42 are positioned on the surface side of the laminated glass 1, not the two-layer intermediate film side.
  • a highly durable tin oxide film (nesa film) formed by the CVD method is suitable for the conductive films 41 and 42.
  • a barrier layer such as a silicon oxide film on the surface of the glass by a CVD method.
  • the sheet resistance values of the conductive films 41 and 42 are: 30 ⁇ / ⁇ or less is preferable.
  • the two-layer intermediate film 15 has a configuration in which a metal network 31 is inserted between two intermediate films 21 and 22, and the two-layer intermediate film 16 is a metal network body between two intermediate films 23 and 24. 32 Is inserted.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • the metal nets 31 and 32 preferably have an opening of 10 mm or more (50 mesh or more).
  • the opening of the mesh is 50 mm or less. It is desirable to be (150 mesh or less).
  • Conductor wires made of metal such as iron, stainless steel, aluminum, and copper can be used. Furthermore, it is preferable to employ a conductive wire that is provided with a blackening oxide film for preventing reflection.
  • the diameter of the wire used for the metal net is 50 ⁇ m or more for ease of handling, It is desirable that the thickness is 180 ⁇ m or less from the viewpoint of transparency.
  • the metal net body 31 straddles the end surface of the glass plate 10, and the metal net body 32 straddles the end surface of the glass plate 12, respectively, and is bent to the surface of the laminated glass. 41 or conductive film 42 is preferable.
  • the conductive tape 50 from the conductive film 41 to the conductive film 42 so as to cover the entire edge of the laminated glass from above the metal net body bent at the end face of the laminated glass.
  • the conductive tape 50 allows all conduction of the metal nets 31 and 32 and the conductive films 41 and 42, a preferable electromagnetic wave shielding effect can be obtained.
  • the conductive tape 50 is formed by laminating a conductive adhesive containing carbon or the like on a metal foil such as copper, aluminum, SUS (Stainless Steel), or zinc, or an insulating adhesive having a hole formed in the metal foil. What laminated
  • stacked the agent can be used.
  • the electromagnetic shielding laminated glass of the laminated glass structure using the 3 glass plates shown in FIG. 1 was produced.
  • the glass plate 11 was 12 mm thick float glass, and the glass plates 10 and 12 were 6 mm thick float glass.
  • the two-layer intermediate film 15 was obtained by sandwiching a metal net 31 between two PVB films 21 and 22 each having a thickness of 0.8 mm.
  • a net having a mesh size of 100 mesh (a mesh size of about 150 ⁇ m) made of stainless steel wire (thickness: about 50 ⁇ m) was used.
  • the same two-layer intermediate film 16 as the two-layer intermediate film 15 was used.
  • a tin oxide film (nesa film) was formed on the glass plates 10 and 12 by a CVD method.
  • the sheet resistance was 15 ⁇ / ⁇ .
  • Electromagnetic shielding performance of the electromagnetic shielding laminated glass produced in this example Horizontally polarized wave, vertically polarized wave (TE ⁇ (Transversal Electric) wave (when electric field is perpendicular to incident surface) and TM (Transversal Magnetic) wave (when magnetic field is perpendicular to incident surface)) according to MIL-STD 285)
  • the electromagnetic shielding performance was measured and the results shown in Table 1 were obtained.
  • Comparative Example 1 An electromagnetic shielding glass 2 having a multilayer glass structure as shown in FIG. 3 was produced.
  • Two metal nets 33 and 34 are sandwiched between the intermediate film 25 and the intermediate film, and laminated glass using two glass plates of a glass plate 13 having a thickness of 6 mm and a glass plate 14 having a thickness of 12 mm. 3 was produced.
  • Example 1 As the metal nets 33 and 34, the same metal nets as in Example 1 were used. Also, As the intermediate films 25 and 26, the same intermediate film as in Example 1 was used.
  • the laminated glass 3 and the glass plate 15 formed by sputtering the Ag film 65 having a sheet resistance of 20 ⁇ / ⁇ are formed into the multilayer glass 2 using the spacer 73 so that the air layer 16 becomes 12 mm. .
  • the plastic films 63 and 64 with a conductive film were provided on the outer glass surface of the multilayer glass 2.
  • the plastic films 63 and 64 with conductive film Polyethylene terephthalate film, SnO 2 film, Ag film, SnO 2 film, A conductive film formed by laminating an Ag film and an SnO 2 film in this order was formed by sputtering.
  • the sheet resistance value of the conductive films of the plastic films with conductive films 63 and 64 was 2 ⁇ / ⁇ .
  • An acrylic adhesive was used for bonding the plastic films with conductive films 63 and 64 to the laminated glass 3 and the glass plate 15.
  • the laminated glass 13 and the glass plate 15 are arranged to face each other, and a spacer 72 is inserted into the periphery of the glass plate, and the laminated glass 13 and the spacer 72 are combined with the glass plate 15 and the spacer 72 with a primary sealing material. Further, the peripheral portion surrounded by the laminated glass 13, the glass plate 15, and the spacer 72 was filled with a secondary sealant.
  • the metal nets 33 and 34 used for the production of the laminated glass 3 are larger than the glass plate, and the metal nets 33 are formed of glass portions of the metal nets 33 and 34 protruding from the glass edges.
  • the end of the glass plate 13 is folded back so as to straddle the end of the plate 13, and the metal net 34 covers the end of the glass plate 14 and the end of the glass plate 15 on which the Ag film is formed. Folded over to cross.
  • the conductive tape 51 was provided so that the whole edge part of the multilayer glass 2 might be straddled, and the conduction
  • the electromagnetic shielding glass having a multilayer glass structure prepared in Example 1 is the same as that in Example 1 of the conductive film of the plastic film with the conductive film, the double-layered metal net used for the laminated glass 2, and the Ag film. A four-layer conductor is provided.
  • the electromagnetic shielding performance of Comparative Example 1 was measured in the same manner as in Example 1. The measurement results are as shown in Table 1. The electromagnetic shielding performance of Comparative Example 1 was inferior to that of Example 1 by 20 dB or more at a larger location.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Securing Of Glass Panes Or The Like (AREA)

Abstract

　本発明に係る電磁遮蔽合わせガラスは、合わせガラスのガラスの間に金属製網体を挿入してなる電磁遮蔽合わせガラスであって、金属製網体を２枚の中間膜の間に挿入して２層中間膜（１５、１６）とし、３枚のガラス板（１０、１１、１２）と２枚の２層中間膜（１５、１６）とを用い、ガラス板（１０）、２層中間膜（１５）、ガラス板（１１）、２層中間膜（１６）、ガラス板（１２）の順に、ガラス板と2層中間膜とを交互に積層して合わせガラス（１）とし、外側に位置するガラス板（１０、１２）の空気側の面に導電性膜（４１、４２）が形成されてなることを特徴とする。

Description

電磁遮蔽合わせガラス
　本発明は、インテリジェントビルの開口部などに装着される、合わせガラス構造の電磁遮蔽ガラスに関し、特に、１０ＭＨｚから２０ＧＨｚの周波数範囲において、高い電磁遮蔽性能を有する電磁遮蔽合せガラスに関する。
近年、商用建物において、ＯＡ機器や通信機器等の電子機器・装置が多量に使用されている。これらの電子機器・装置の多くが発生させる電磁波は、他の電子機器や電子制御機器が誤動作する原因となる。また、ノイズを発生させる
原因にもなっている。 
さらに、高度情報化に伴い、開口部から侵入する電磁波が、建物内の電子機器を誤動作させることがある。 
また、開口部から出ていく電磁波も、外部の電子機器などを誤動作させる原因となる。
合わせガラスに２枚の中間膜を用い、中間膜の間に金属製網が挿入され、金属製網がガラスの端部で合わせガラスの表面まで折り曲げられた電磁遮蔽ガラ
スが知られている（特許文献１）。　
さらに、合わせガラスに３枚の中間膜を用い、中間膜の間に導電性メッシュと導電性フィルムが挿入され、導電性メッシュと導電性フィルムはガラスの端部で合わせガラスの表面まで折り曲げられ、さらに導電性テープで合わせガラスの端部が導電性メッシュと導電性フィルムとが固定されている電磁遮蔽ガラスが開示されている。導電性フィルムには、金属膜あるいはＩＴＯ（Indium Tin Oxide）膜が形成されたものが用いられる（特許文献２）。
また、１ＭＨｚ－３０ＭＨｚの周波数範囲で５０－６５ｄＢの遮蔽性能を有する、導電性の網体が２枚の中間膜の間に挿入された合わせガラス構成の電磁遮蔽ガラスが開示されており（特許文献３）、更には、導電性膜が形成されているガラス板と導電性網体とが２枚の中間膜に挿入されてなる合わせガラスを用いて構成される複層ガラス構成の電磁遮蔽ガラスが開示され、電磁遮蔽性能は、０．１ＭＨｚ～２０ＧＨｚの周波数範囲で、約７０ｄＢである（特許文献４）。 
金属製網１枚を２枚の中間膜の間に挿入した合わせガラスと、金属製網２枚を２枚の中間膜に挿入した合わせがラストを用いてなる、複層ガラス構成の電磁遮蔽ガラスが開示され、０．１ＭＨｚ～１ＧＨｚの周波数範囲で７０～９５ｄＢ程度の電磁遮蔽性能が記載されている（特許文献５）。
また、６５～１５０メッシュの導電性網体２枚を用いる電磁遮蔽多重ガラスで、０．１ＭＨｚ～２０ＧＨｚにわたり６０～７０ｄＢ程度の遮蔽性能であることが開示されている（特許文献６）。 
また、酸化スズ膜の透明導電膜を形成したものを用いて、１０～３０ｄＢの電磁遮蔽パネルが開示されている（特許文献７）。
特開平11-312893号公報 特開平10-322083号公報 特開2001-177291号公報 特開2000-183586号公報 特開平９-321484号公報 特開2000-183584号公報 特開2004-346555号公報
　近年、放送波から、無線ＬＡＮ(Local Area Network)まで、かなり広い周波数範囲にわたり、通信が行われるようになり、また、通信機器の感度も高性能になり、誤動作や盗聴などのリスクが増大してきた。
本発明は、このような状況に対して十分な電磁遮蔽性能を有する電磁遮蔽合わせガラスの提供することを課題とする。
　本発明に係る電磁遮蔽合わせガラスは、合わせガラスのうちのガラスの間に金属製網体を挿入してなる電磁遮蔽合わせガラスであって、金属製網体を２枚の中間膜の間に挿入して２層中間膜とし、３枚のガラス板と２枚の２層中間膜とを用い、ガラス板、２層中間膜、ガラス板、２層中間膜、ガラス板の順に、ガラス板と2層中間膜とを交互に積層して合わせガラスとし、外側に位置するガラス板の空気側の面に導電性膜が形成されてなることを特徴とする電磁遮蔽合わせガラスである。
　また、本発明に係る電磁遮蔽合わせガラスは、前記電磁遮蔽合わせガラスにおいて、合わせガラスの中央に用いられるガラス板の厚さが３～２０ｍｍであることを特徴とする電磁遮蔽合わせガラスである。
　また、本発明に係る電磁遮蔽合わせガラスは、前記電磁遮蔽合わせガラスにおいて、合わせガラスの外側に用いられるガラスの厚さが３～１０ｍｍであることを特徴とする電磁遮蔽合わせガラスである。
　また、本発明に係る電磁遮蔽合わせガラスは、前記電磁遮蔽合わせガラスにおいて、導電性膜が酸化スズでなることを特徴とする電磁遮蔽合わせガラスである。
また、本発明に係る電磁遮蔽合わせガラスは、前記電磁遮蔽合わせガラスにおいて、金属製網体が５０～１５０メッシュであることを特徴とする電磁遮蔽合わせガラスである。
本発明に係る電磁遮蔽合わせガラスは、広い周波数範囲に対応した高性能の電磁遮蔽合わせガラスの提供を可能にする。
本発明に係る電磁遮蔽合わせガラスの構成を示す概略断面図。 第１図に示す電磁遮蔽合わせガラスの端部の概略断面図。 導電性部材を４層にした、複層ガラス構成の電磁遮蔽ガラスの概略断面図。
１０、１１、１２、１３、１４、１５ ガラス板 
１６ 空気層 
２１、２２、２３、２４、２５、２６ 中間膜 
３１、３２、３３、３４ 金属製網体 
４１、４２ 導電膜 
５０、５１、５２ 導電テープ 
６３、６４ 導電膜付プラスチックフィルム 
６５ Ａｇ膜 
７１ ２次シール 
７２ １次シール 
７３ スペーサ
　本発明に係る電磁遮蔽合わせガラスは、図１に示されるような、３枚のガラス板１０、１１、１２を用いて作製される、合わせガラス１の構成をした、電磁遮蔽合わせガラスである。
　ガラス板１０、１１、１２には、ソーダ石灰シリカ系ガラスをはじめとする無機ガラスの板が用いられ、特に、フロート法で製造されるフロートガラスあるいはフロートガラスを強化した強化ガラス等が好適に用いられる。
　ガラス板１０、１１、１２には、建築用に用いられる厚さ３ｍｍ以上２０ｍｍ以下のフロートガラスが好適に用いられる。特に外側に用いるガラス板１０、１２には厚さ３～１０ｍｍのガラス板が、また中央に用いられるガラス板１１には厚さ３～２０ｍｍのガラス板が好ましく、さらに望ましくは、ガラス板１０、１２には厚さ５～１０ｍｍのガラス板が、また中央に用いられるガラス板１１には厚さ６～１５ｍｍのガラス板が好ましい。
　ガラス板１０、１１、１２は、２層中間膜１５、１６によって一体化され、以上から合わせガラス１を構成する。
　さらに、ガラス板１０、１２の片面に導電膜４１、４２が形成され、導電膜４１、４２は、合わせガラス１の２層中間膜側ではなく、表面側に位置させる。
　導電膜を合わせ面ではなく、外側の面に設けるため、導電膜４１、４２にはＣＶＤ法で製膜される、耐久性の良い酸化スズ膜（ネサ膜）が好適である。ソーダ石灰シリカ系ガラスの表面に酸化スズ膜を形成する場合、ガラスの表面に酸化ケイ素膜などのバリア層をＣＶＤ法で形成することが好ましい。
　導電膜４１、４２のシート抵抗値は、高い電磁遮蔽性能を得るためには、
３０Ω／□以下とすることが好ましい。
　２層中間膜１５は、２枚の中間膜２１、２２の間に金属網体３１を挿入した
構成であり、２層中間膜１６は、２枚の中間膜２３、２４の間に金属網体３２
を挿入した構成である。
　中間膜２１、２２、２３、２４には、ポリビニルブチラール（ＰＶＢ, Poly vinyl Butyral）やエチレンビニルアセテート（ＥＶＡ,　Ethylene vinyl Acetate）が好適に用いられる。
　金属製網体３１、３２には、透視性を保つために、目開きが１０ｍｍ以上（５０メッシュ以上）であることが好ましく、また、高い電磁遮蔽性能を得るためには、目開きは５０ｍｍ以下（１５０メッシュ以下）とすることが望ましい。
また、金属製網体３１、３２の線材については、特定するものではないが、
鉄、ステンレス鋼、アルミニウム、銅等の金属の導線を用いることができる。
さらに、該導線に反射防止用の黒染 (Blackening)酸化皮膜を施したものが好ましく採用できる。
金属製網体に用いられる線材の径は、取り扱い易さから、５０μｍ以上とし、
透視性の観点から１８０μｍ以下とすることが望ましい。
金属製網体３１は、ガラス板１０の端面を跨って、また、金属製網体３２はガラス板１２の端面を跨って、それぞれ、合わせガラスの表面にまで折り曲げられていることが、導電膜４１あるいは導電膜４２と導通が図られ、好ましい。
合わせガラスの端面で折り曲げられた金属製網体の上から、合わせガラスの端部全体を覆うように、導電テープ５０を導電膜４１から導電膜４２に跨って設けることが好ましい。
　導電テープ５０により、金属網体３１、３２および導電膜４１、４２の全ての導通がとられるので、好ましい電磁波の遮蔽効果が得られる。
　導電テープ５０には、銅、アルミ、ＳＵＳ (Stainless Steel)、亜鉛などの金属箔に、カーボンなどを含有した導電性の粘着剤を積層したもの、あるいは該金属箔に孔を開けた絶縁性粘着剤を積層したものなどを使用することができる。
　以下、図面を参照しながら本発明に係る電磁遮蔽合せガラスを詳細に説明する。
図１に示す、ガラス板３枚を用いた合わせガラス構成の電磁遮蔽合わせガラスを作製した。ガラス板１１には、厚さ１２ｍｍのフロートガラスを用い、ガラス板１０、１２には厚さ６ｍｍのフロートガラスを用いた。
　２層中間膜１５には、厚さ０．８ｍｍの２枚のＰＶＢ膜２１、２２の間に金属製網体３１を挟み込んだものを用いた。
　金属製網体３１には、ステンレス鋼の線材（太さが約 ５０μｍ）を用いてなるメッシュサイズ １００メッシュ（目開き約 １５０μｍ）の網体を用いた。２層中間膜１６にも、２層中間膜１５と同じものを用いた。
　ガラス板１０、１２には、酸化スズ膜（ネサ(nesa)膜）をＣＶＤ法で形成した。なお、シート抵抗は、１５Ω／□であった。 
　本実施例で作製した電磁遮蔽合わせガラスの電磁遮蔽性能を、米国ミル規格 
ＭＩＬ－ＳＴＤ ２８５ に則り、水平偏波、垂直偏波（ＴＥ{（Transversal Electric) 波(電界が入射面に垂直な場合）とＴＭ（Transversal Magnetic)波（磁界が入射面に垂直な場合））における電磁遮蔽性能（電磁波減衰率）を測定し、表１の結果を得た。
　電磁遮蔽性能は７０ｄＢを下回ることはなく、ほとんどの周波数範囲で９０～１００ｄＢ以上のきわめて良好な遮蔽性能を示した。
比較例１ 
　図３に示すような複層ガラス構成の電磁遮蔽ガラス２を作製した。
　２枚の金属製網体３３、３４を中間膜２５と中間膜との間に挟み込み、厚さ６ｍｍのガラス板１３と厚さ１２ｍｍのガラス板１４の２枚のガラス板を用いて、合わせガラス３を作製した。
　金属製網体３３，３４には実施例１と同様の金属製網体を用いた。また、
中間膜２５、２６にも、実施例１と同様の中間膜を用いた。 
次に、合わせガラス３とシート抵抗が２０Ω／□のＡｇ膜６５をスパッタリング法で成膜したガラス板１５とを、空気層１６が１２ｍｍとなるようにスペーサ７３を用いて複層ガラス２にした。
　さらに、導電膜付プラスチックフィルム６３、６４を、複層ガラス２の
外側のガラス面に設けた。導電膜付プラスチックフィルム６３、６４には、
ポリエチレンテレフタレートのフィルムに、ＳｎＯ2膜、Ａｇ膜、ＳｎＯ2膜、
Ａｇ膜、ＳｎＯ2膜の順に積層してなる導電膜を、スパッタリング法で成膜したものを用いた。導電膜付プラスチックフィルム６３、６４の導電膜のシート抵抗値は２Ω／□とした。導電膜付プラスチックフィルム６３、６４の合わせガラス３およびガラス板１５への接着には、アクリル系接着剤を用いた。
合わせガラス１３とガラス板１５とを対向配置し、ガラス板の周辺部に
スペーサ７２を挿入し、合わせガラス１３とスペーサ７２とを、また、ガラス板１５とスペーサ７２とを、１次シール材で接着し、さらに、合わせガラス１３、ガラス板１５およびスペーサ７２とで囲まれる周辺部分を、２次シール材で充填した。 
 １次シール材にはブチルゴム系の接着剤を用い、２次シール材には、シリコーン系の接着剤を用いた。 
合わせガラス３の作製に用いた金属製網体３３、３４はガラス板よりも大きいものを用い、金属製網体３３、３４のガラスのエッジからはみ出た部分を、金属製網体３３は、ガラス板１３の端部を跨ぐようにガラス板１３の端部を折り返し、また、金属製網体３４は、ガラス板１４の端部を覆い、Ａｇ膜を成膜してあるガラス板１５の端部を跨ぐように折り返した。
　また、複層ガラス２の端部全体を跨ぐように導電テープ５１を設け、金属製網体３３、３４、Ａｇ膜６５および導電膜付プラスチックフィルム６３、６４の導電膜との導通を行った比較例１で作製した複層ガラス構成の電磁遮蔽ガラスは、導電膜付プラスチックフィルムの導電膜、合わせガラス２に用いた２枚重ねの金属製網体、及び、Ａｇ膜の、実施例１と同じ、４層の導体を設けたものである。 
比較例１の電磁遮蔽性能を実施例１と同様に測定した。測定結果は、表１の通りである。比較例１の電磁遮蔽性能は、実施例１に比較し、大きいところでは２０ｄＢ以上劣るものであった。 
Figure JPOXMLDOC01-appb-T000001

Claims (5)

  1. 合わせガラスのガラスの間に金属製網体を挿入してなる電磁遮蔽合せガラスであって、金属製網体を２枚の中間膜の間に挿入して２層中間膜とし、３枚のガラス板と２枚の２層中間膜とを用い、ガラス板、２層中間膜、ガラス板、２層中間膜、ガラス板の順に、ガラス板と2層中間膜とを交互に積層して合わせガラス１とし、外側に位置するガラス板の空気側の面に導電性膜が形成されてなることを特徴とする電磁遮蔽合せガラス。
  2. 該合わせガラス１の中央に用いられるガラス板の厚さが３～２０ｍｍであることを特徴とする請求項１に記載の電磁遮蔽合せガラス。
  3. 該合わせガラス１の外側に用いられるガラスの厚さが３～１０ｍｍであることを特徴とする請求項１または２に記載の電磁遮蔽合せガラス。
  4. 該導電性膜が、酸化スズでなることを特徴とする請求項１乃至３のいずれかに記載の電磁遮蔽合せガラス。 
  5. 該金属製網体が、５０～１５０メッシュであることを特徴とする請求項１乃至４のいずれかに記載の電磁遮蔽合せガラス。
PCT/JP2009/068757 2008-11-14 2009-11-02 電磁遮蔽合わせガラス WO2010055787A1 (ja)

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CN102953656A (zh) * 2011-08-23 2013-03-06 吴江市金丰木门厂 防辐射木门
JP2015086659A (ja) * 2013-11-01 2015-05-07 株式会社Ｌｉｘｉｌ 多層ガラスパネル

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JP5096296B2 (ja) * 2008-11-14 2012-12-12 セントラル硝子株式会社 電磁遮蔽合わせガラス
JP6868191B2 (ja) * 2016-10-31 2021-05-12 Ａｇｃ株式会社 遮音板

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JP2000114769A (ja) * 1998-10-06 2000-04-21 Central Glass Co Ltd 電磁遮蔽ガラス
JP2005016160A (ja) * 2003-06-26 2005-01-20 Central Glass Co Ltd 電磁遮蔽パネルおよび電磁遮蔽窓
JP2006086446A (ja) * 2004-09-17 2006-03-30 Mitsubishi Cable Ind Ltd 電波吸収体

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JP2000114769A (ja) * 1998-10-06 2000-04-21 Central Glass Co Ltd 電磁遮蔽ガラス
JP2005016160A (ja) * 2003-06-26 2005-01-20 Central Glass Co Ltd 電磁遮蔽パネルおよび電磁遮蔽窓
JP2006086446A (ja) * 2004-09-17 2006-03-30 Mitsubishi Cable Ind Ltd 電波吸収体

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102953656A (zh) * 2011-08-23 2013-03-06 吴江市金丰木门厂 防辐射木门
JP2015086659A (ja) * 2013-11-01 2015-05-07 株式会社Ｌｉｘｉｌ 多層ガラスパネル

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