JPH0856091A - Wave absorber - Google Patents

Abstract

PURPOSE:To obtain a unit wave absorber, which is superior in decoration properties, soundproof properties, heat insulating properties, mechanical strength and the like, is lightweight and is low in cost, by a method wherein a light-transmitting base material having a decorative surface is used as a surface layer, which is arranged at the outermost layer of the wave absorber, and a magnetic material layer, an electromagnetic wave reflection layer and a light-shielding base material are formed in order on the light-transmitting base material. CONSTITUTION:A wave absorber 1 is constituted by forming a magnetic material layer 2, which consists of a ferrite or the like, on a light-transmitting base material 1A consisting of a transparent or translucent glass, such as a float glass, a polished plate glass, a template glass and a reinforced glass. An electromagnetic wave reflection layer 3 is formed on the layer 2 using a metallic plate material, a conductive porous material, a fiber material or the like and a light-shielding base material 1B, such as a gypsum board and concrete which are formed as a fire-resisting material or a heat-insulating material, is provided on the layer 3. These members can be made to adhere with each other using a bonding agent or the like, but for example, a metallic material is made to spray on the light-shielding base material 1B at a low temperature and the layer 3 may be formed.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention is applied to the ceiling, inner wall surface, partition wall, floor, etc. of a general building to absorb electromagnetic waves emitted from OA equipment or the like used indoors and to the outside. The present invention relates to a light-shielding architectural base material that prevents the leakage of water and prevents the ghost phenomenon due to the reflection of radio waves that arrive at a building. Specifically, it is a lightweight structure with excellent functionality, soundproofing, and decorativeness. Of the radio wave absorber of.

[0002]

2. Description of the Related Art Conventionally, in buildings, offices, hospitals, etc. where precision electronic devices such as computers are used, from the viewpoint of preventing noise generation, malfunction, and information leakage, mutual electromagnetic waves are indoors and outdoors. There is a need for a shielding means that does not allow light to penetrate. As the electromagnetic wave shielding means, for example, a transparent conductive film is formed on a glass plate and radio waves transmitted through the electromagnetic wave shielding glass are shielded by the transparent conductive film, or a ferrite having a block structure on one surface of the conductive substrate is used. Stacked products and the like are known. Of these, the former is mainly used for building openings because it is a light-transmitting electromagnetic wave shield, and the latter is used for building walls because it is a light-shielding electromagnetic wave absorber. .

However, in the former case, since the transparent conductive film is not substantially a radio wave absorber, most of the radio waves are reflected,
Buildings around the building to which the electromagnetic wave shielding glass is attached have a problem of receiving radio interference, and are rarely actually used. On the other hand, the latter is difficult to construct due to the heavy weight of the substrate, and the manufacturing cost is high, and the decorativeness is extremely poor for use as an interior / exterior material due to the color and shape of the magnetic material. There was a problem.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks by using a radio wave absorber as a light-transmitting base material, a magnetic material layer, an electromagnetic wave reflecting layer, a light-shielding base material, and the like. In which the members forming each layer are integrated by adhesion, fusion bonding, mechanical fixing, etc., and the decorative surface with gloss and color is placed on the indoor side by taking advantage of the material of the members. Is.

[0005]

The object of the present invention is not only excellent in functionality such as electromagnetic wave absorption but also decorative,
An object of the present invention is to provide a unit-type electromagnetic wave absorber that has a lightweight structure excellent in soundproofing properties, heat insulating properties, mechanical strength, etc. and can be provided at low cost.

[0006]

According to the present invention, a light-transmitting substrate having a decorative surface on at least the outermost layer, a magnetic material layer provided on the light-transmitting substrate, and a magnetic material layer are provided. An electromagnetic wave absorber consisting of an electromagnetic wave reflection layer provided and a light-shielding base material provided on the electromagnetic wave reflection layer, or a magnetic material layer, an electromagnetic wave reflection layer provided on the magnetic material layer, and an electromagnetic wave reflection layer provided on the electromagnetic wave reflection layer Electromagnetic wave absorption consisting of a light-shielding base material, a magnetic material layer formed by mixing an inorganic material and a magnetic material, and having a decorative surface on at least the outermost layer by utilizing the material of the inorganic material Body, or at least the light-shielding substrate having a decorative surface on the surface arranged in the outermost layer, a magnetic material layer provided on the light-shielding substrate, an electromagnetic wave reflection layer provided on the magnetic material layer, A radio wave absorber made of a light-shielding base material provided on a magnetic wave reflection layer.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention which has achieved such an object will be described with reference to the drawings of the following embodiments.

FIG. 1 is a schematic sectional view of a radio wave absorber according to a first embodiment of the present invention, FIG. 2 is a schematic sectional view of a radio wave absorber according to a second embodiment of the present invention, and FIG. FIG. 6 is a schematic sectional view of a radio wave absorber of a third embodiment of the present invention.

The electromagnetic wave absorber of each embodiment of the present invention is a building material used for windows and decorative walls of general buildings.
To the schematic cross-sectional view of FIG. Among these, the radio wave absorber 1 of the first embodiment includes a transparent base material 1A and a transparent base material 1
A radio wave absorber having a radio wave absorption layer between B and the radio wave absorber 1 of the second embodiment is a base material 1C that shields the radio wave absorption layer.
The electromagnetic wave absorber 1 of the third embodiment, which is an electromagnetic wave absorber provided on the upper side, includes two light-shielding base materials 1D. A radio wave absorber having a radio wave absorption layer provided between 1E. Specifically, the radio wave absorption layer is composed of a magnetic material layer 2 and an electromagnetic wave reflection layer 3 provided on the magnetic material layer 2. .

The transparent base material 1A used in the radio wave absorber 1 of the present invention is a float glass, a polishing plate glass, a template glass,
A transparent or semi-transparent glass such as reinforced glass, while the light-shielding base material 1B. 1C. 1D is formed from tile, brick, gypsum board, concrete material, or the like.

In the radio wave absorber 1 of the present invention, these base materials are formed in a laminated structure using an adhesive layer, or formed in a multi-layered structure with a spacer interposed therebetween, thereby providing a function such as soundproofing. It is intended to improve mechanical strength such as penetration resistance.

The magnetic material layer 2 used in the present invention is
Any magnetic material such as magnetite, permalloy, ferrite, and stainless can be used, and the electromagnetic wave reflection layer 3 is made of gold, silver, copper, nickel, aluminum,
It can be formed from a conductive material such as iron.

As shown in FIG. 1, the radio wave absorber 1 of the first embodiment has a transparent base material 1A having a decorative surface on at least the outermost layer, and the transparent base material. 1A, a magnetic material layer 2 provided on the magnetic material layer 2, an electromagnetic wave reflection layer 3 provided on the magnetic material layer 2, and a light-shielding base material 1B provided on the electromagnetic wave reflection layer 3.
The main point is to consist of.

That is, the radio wave absorber 1 according to the first embodiment of the present invention.
As shown in FIG. 1, a translucent substrate 1A made of transparent or translucent glass such as float glass, polishing plate glass, template glass, and strengthening glass, and a magnetic material layer 2 made of ferrite or the like.
Is formed.

An electromagnetic wave reflection layer 3 is formed on the magnetic material layer 2 by a metal plate material, a conductive porous material, a fiber material, or the like.
A light-shielding base material 1B such as a fireproof material, a gypsum board formed as a heat insulating material, or concrete is provided on the electromagnetic wave reflection layer 3.

The above-mentioned members can be attached to each other by using an adhesive or the like, but other methods may be used. For example, a metal material is sprayed onto the light-shielding base material 1B at a low temperature. The electromagnetic wave reflection layer 3 may be formed by using the above.

The magnetic material layer 2 is formed by mixing magnetic powder and conductive powder such as carbon powder in an adhesive layer made of a curable resin such as naphthol or white Portland cement. You may.

Next, the radio wave absorber 1 according to the second embodiment of the present invention.
2 includes a magnetic material layer 2, an electromagnetic wave reflection layer 3 provided on the magnetic material layer 2, and a light-shielding / transparent base material 1C provided on the electromagnetic wave reflection layer 3. The gist of the magnetic material layer is that it is formed by mixing an inorganic material and a magnetic material.

That is, the radio wave absorber 1 according to the second embodiment of the present invention.
2 does not use a light-transmitting base material as in the first embodiment, as shown in FIG. 2, the magnetic material layer 2, the electromagnetic wave reflection layer 3 provided on the magnetic material layer 2, It is composed of a light-shielding and translucent base material 1C provided on the electromagnetic wave reflection layer 3.

In this second embodiment, the magnetic material layer 2 is
Inorganic materials such as bricks, tiles, ceramics, and powders of magnetic materials such as ferrite are mixed, and the mixture is integrally fired as a plate material. The magnetic material layer 2 of the second embodiment has a decorative surface on at least the outermost layer, which is made of an inorganic material.

Next, the radio wave absorber 1 of the third embodiment of the present invention.
As shown in FIG. 3, is a light-shielding base material 1D having a decorative surface on at least the outermost layer, a magnetic material layer 2 provided on the light-shielding base material 1D, and the magnetic material. The gist is that it is composed of an electromagnetic wave reflection layer 3 provided on the layer 2 and a light-shielding substrate 1E provided on the electromagnetic wave reflection layer 3.

That is, the radio wave absorber 1 according to the third embodiment of the present invention.
As shown in FIG. 3, the transparent base material as in the first embodiment is not used, and for example, a material such as tile or brick is used to decorate at least the outermost surface. A magnetic material layer 2 is provided on a light-shielding base material 1D having a surface, and a conductive electromagnetic wave reflection layer 3 and a light-shielding base material 1E such as gypsum board or concrete are provided on the magnetic material layer 2. Is provided.

The radio wave absorber 1 of each of the embodiments of the present invention is arranged so as to be in sequence with the magnetic material layer 2 and then the radio wave reflection layer 3 in the direction in which radio waves arrive. Therefore, when forming the anechoic chamber, in the case of the first embodiment, the transparent base material 1 is used.
The decorative surface of A is arranged on the indoor side, the decorative surface of the magnetic material layer 2 is arranged on the indoor side in the case of the second embodiment, and the decorative surface of the light-shielding base material 1D is arranged in the case of the third embodiment. Since the decorative surface is arranged, it can be effectively used as an interior / exterior material.

A separate non-conductive decoration layer is formed on the decorative surface of the transparent base material 1A, the decorative surface of the magnetic material layer 2, and the decorative surface of the light-shielding base material 1D. I don't mind. For the decorative layer, a paint or non-metal film using a coloring component that does not affect electromagnetic waves is used. Further, this decorative layer can be formed as a heat ray reflective film, and the heat insulating property can be improved.

The radio wave absorber of the present invention comprises a transparent substrate, a magnetic material layer provided on the transparent substrate, an electromagnetic wave reflection layer provided on the magnetic material layer, and an electromagnetic wave reflection layer. Or a magnetic material layer, an electromagnetic wave reflection layer provided on the magnetic material layer, and a light-shielding base material provided on the electromagnetic wave reflection layer. The material layer is formed by mixing an inorganic material and a magnetic material, or a light-shielding base material,
It is composed of a magnetic material layer provided on a light-shielding base material, an electromagnetic wave reflection layer provided on the magnetic material layer, and a light-shielding base material provided on the magnetic wave reflection layer, and has a laminated or multilayer structure. In addition to being excellent in soundproofing, it is excellent in decorativeness because it has a decorative surface to which gloss and color are added at least on the outermost layer. Generally, the radio wave absorber of the present invention can use inexpensive and lightweight materials for each member, and can be formed as an integrated unit,
An epoch-making product that offers a low-cost, lightweight structure that is suitable for use on the ceiling, walls, floors, etc. of general buildings that need to shield electromagnetic waves and that has excellent decorative properties. It is a meaningful invention.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a radio wave absorber according to a first embodiment of the present invention.

FIG. 2 is a schematic sectional view of a radio wave absorber according to a second embodiment of the present invention.

FIG. 3 is a schematic sectional view of a radio wave absorber according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Radio wave absorber 1A Light-transmitting base material 1B Light-shielding base material 1C Light-shielding base material 1D Light-shielding base material 1E Light-shielding base material 2 Magnetic material layer 4 Electromagnetic wave reflection layer

Claims (3)

[Claims] 1. A translucent base material having a decorative surface on at least the outermost layer, a magnetic material layer provided on the translucent base material, and a magnetic material layer provided on the magnetic material layer. An electromagnetic wave absorber comprising an electromagnetic wave reflection layer and a light-shielding base material provided on the electromagnetic wave reflection layer. 2. A magnetic material layer, an electromagnetic wave reflection layer provided on the magnetic material layer, and a light-shielding base material provided on the electromagnetic wave reflection layer, wherein the magnetic material layer comprises an inorganic material and a magnetic material. A radio wave absorber which is formed by mixing with a material and has a decorative surface on at least the outermost layer by utilizing the material of an inorganic material. 3. A light-shielding base material having a decorative surface on at least the outermost layer, a magnetic material layer provided on the light-shielding base material, and electromagnetic wave reflection provided on the magnetic material layer. Layers and
A radio wave absorber comprising a light-shielding base material provided on the electromagnetic wave reflection layer.