JPH02182445A - Composite panel - Google Patents

Abstract

PURPOSE:To enhance weatherability, corrosion resistance and execution properties and to reduce jamming by integrally forming a flexible radiowave absorbing material wherein stainless steel fibers and synthetic resin fibers are formed into a nonwoven fabric to the front or rear surface of a base material. CONSTITUTION:A base material 1 is composed of one or more kind of a thin metal plate, a plastic plate, a non-combustible plate, a synthetic resin foam or rubber. A flexible radiowave absorbing material 2 consists of stainless steel fibers 3 and synthetic resin fibers 4 and, for example, the stainless steel fibers 3 and polyester fibers 4 are formed into a nonwoven fabric shape and a large number of nonwoven fabrics are stacked to form said absorbing material and a rear material 6 is composed of kraft paper, asbestos paper, an aluminum foil, a synthetic resin sheet or a laminate thereof. The base material 1 and the flexible radiowave absorbing material 2 are integrally fixed, for example, through an adhesive 7.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a composite board in which a nonwoven fabric having radio wave absorption performance is integrally laminated on the front or back side of a base material such as a steel plate, a heat insulating board, or other composite base material. It is related to.

[Conventional technology]

Radio waves used in artificial hygiene as a relay base, or for various communications and broadcasts, may be reflected by obstacles or partially absorbed, changing the intended radio wave characteristics, causing ghosts or interference, and causing interference with equipment. The problem is that it has a negative impact on Therefore, in order to suppress this, ferrite is applied.

[Problem to be solved by the invention]

However, since ferrite is formed by coating it on the surface of a base material, it is difficult to form a uniform coating, and it also has poor weather resistance and has limited peeling and absorption properties.

[Means to solve the problem]

In order to eliminate these drawbacks, the present invention integrally laminates a sheet-like radio wave absorber on the front or back surface of the base material to achieve uniform radio wave absorption ability, weather resistance, and excellent color. In addition, we propose a composite board that is flexible and can be reliably bonded without being affected by the surface shape of the base material.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a composite plate according to the present invention will be described in detail below with reference to the drawings. That is, FIG. 1 is a perspective view showing a typical example of the above-mentioned composite board, where 1 is a base material, -? 5 is a flexible radio wave absorber, and 5 is a core material such as polyurethane foam, polystyrene foam, phenol foam, etc.
Polyisocyanurate foam or the like functions as a heat insulating material and a vibration damping material, and 6 is a back material, which is a composite plate in which each constituent material is fixed together. To explain further, the base material l is made of one or more types of thin metal plates, plastic plates, noncombustible plates, synthetic resin foams, rubber, etc. The thin metal plates include colored steel plates, stainless steel plates, galvalume steel plates, galvanized steel plates, aluminum plates, and titanium plates. Alloy plates, etc., plastic plates include PVC steel plates,
polysulfide, polycarbonate, polyurethane,
The noncombustible board is made of gypsum board, ALC, slate, concrete, etc., and the synthetic resin foam is made of polyurethane, polystyrene, phenol, polyisocyanurate, polyphenylene, polyvinyl chloride, etc.

The flexible radio wave absorbing material is made up of stainless steel fibers 3 and synthetic resin fibers 4, as shown in a partially enlarged view in Figure 2. 30 μ) 4 to form a non-woven fabric, and this is non-woven into multiple layers; ■ Lead powder, stainless steel fiber 3, and polyester fiber 4 are bonded together with acrylic resin, and multiple layers are formed; ■■ Absorbers, etc. made by compressing and forming multiple layers of sheets containing ferrite powder in It consists of one type. The backing material 6 is made of kraft paper, asbestos paper, aluminum foil, synthetic resin sheet, or a laminate of one of these. In addition, the base material 1 and the flexible radio wave absorber -? −
For example, as shown in FIG. 3, the base material 1 and the absorbent body are fixed together via an adhesive 7.

What has been described above is only one embodiment of the composite plate according to the present invention, and it can also be formed as shown in FIGS. 4(a) to (C) to 8(a) to (n). . In other words, Fig. 4 (
Figure a) is a composite plate in which a flexible radio wave absorber 2 is interposed between the base material 1 and the core material 5, and (b) is a composite plate in which the surface of the core material 5 is wavy and a flexible radio wave absorber is placed on the surface. A composite plate with integrally interposed
(C) is a composite plate in which a vibration-proof rubber adhesive 7a is integrally interposed between the base material 1 and the flexible radio wave absorber 1. Also,
Figures 5 (a) to (1) to Figure 8 (a) to (n) show examples of cross-sectional shapes, and the structure may be as shown in Figures 4 (a) to (C) or as appropriate. This is to intervene. In addition, in FIGS. 5 to 8, the flexible radio wave absorbing weight is omitted.

[Effects of the Invention] As described above, according to the composite plate according to the present invention, (1) Since it is flexible, a radio wave absorber can be reliably formed in accordance with the shape of the base material. ■Excellent weather resistance, color fastness, and workability.

■Radio wave interference can be significantly reduced. ■Insulation and other properties can be easily added.

It has the following characteristics.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a composite plate according to the present invention, and FIG.
Figure 3 is an explanatory diagram showing a part of it enlarged, and Figure 4 (
FIGS. 8(a) to 8(n) are explanatory diagrams showing other embodiments. l...Base material, main...flexible radio wave absorber. No E≧1 Figure 3 Figure 4 Figure 5 Figure S Figure (r) Figure C] Figure +1 Figure ? figure

Claims (1)

[Claims] (1) A composite plate characterized in that a flexible radio wave absorber made of a nonwoven fabric of stainless steel fibers and synthetic resin fibers is integrally formed on the front or back surface of a base material.