JPS6232045A - Conductive laminated board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a conductive laminate having a synthetic resin layer provided between metal plates.

b. Conventional technology In recent years, automobiles, vehicles, home appliances, shipbuilding, building materials, and other structures have been used for purposes such as weight reduction, soundproofing, vibrationproofing, and corrosionproofing.
Laminated plates (for example, laminated steel plates) in which a synthetic resin layer is interposed between metal plates (for example, steel plates) are used. For example, for the purpose of suppressing vibrations, a synthetic resin layer of 0.1 m or less is interposed between steel plates, and for the purpose of weight reduction, a synthetic resin layer of <0.1 m or more is interposed. ing.

Since these laminates have a non-conductive synthetic resin interposed in the intermediate layer, there are problems with welding and painting (electrostatic coating), and several conventional techniques have been disclosed to make them conductive. ing. For example, a laminated board (Japanese Patent Laid-Open No. 58-8
4756, conventional example A), a sand inch laminate with a metal net provided in the intermediate synthetic resin layer (Japanese Patent Laid-Open No. 58-13
2550, Conventional Example B), a laminated plate in which one of the metal plates is a deformed plate and a contact portion is provided on a part of both metal plates (
JP-A-58-191154, JP-A-58497045
, Conventional Example C).

Composite vibration-damping steel plates spot-welded prior to arc welding for product manufacturing (JP-A-59-27794, conventional example), one steel plate has a protrusion, and the intermediate layer is passed through the other steel plate. Composite steel plate in contact with (JP-A-59-1
03748, Conventional Example E), a laminate in which a conductive substance is mixed into the intermediate synthetic resin layer and an uneven pattern is provided on one metal plate (Japanese Unexamined Patent Publication No. 59-145142, Conventional Example F), etc. There is.

C8 Problems to be Solved by the Invention In the prior art described above, although conventional examples A and C can obtain conductivity, the vibration damping effect deteriorates, and the processability, which is an important factor in product manufacturing, deteriorates. There is a point. Furthermore, Conventional Example B has the disadvantage that it is rather heavy. Furthermore, the conventional method has the problem of increasing the number of machining steps and increasing the cost.

Further, in Conventional Example E, many deformed parts appear on the surface, and there are many restrictions on the appearance. Further, Conventional Example F has problems in that it is heavy, the cost increases, and the conductivity is not necessarily sufficient.

In view of the above-mentioned circumstances, the present invention aims to provide a conductive laminate which solves the problems of the above-mentioned conventional techniques.

d8 Means for Solving Problems In order to solve the above-mentioned problems, the present invention provides a laminate having conductive metal layers on both outer sides and a non-conductive intermediate layer between them, in which the intermediate layer is conductive. A large number of spheres each having a surface are interposed in a dispersed manner, and the surfaces of the spheres are brought into contact with the metal inner surfaces on both the outer sides.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

l is a laminate plate, 2 is a steel plate placed on both outsides of the laminate plate l,
3 is a conductive metal plate such as a stainless steel plate; 3 is an intermediate layer made of a non-conductive material such as a synthetic resin such as nylon, PP, or PR; 4 is an intermediate layer 3 and both metal plates 2;
It is a large number of spheres arranged between the two.

The sphere 4 consists of a spherical synthetic resin part 10, which is coated with a conductive film 11. The material constituting the synthetic resin portion 10 is preferably a material having the same or similar properties to the intermediate layer 3, or a material that is easily mixed.

Further, the coating 11 is made of the same material as the metal plate 2, or a material having the same or different melting point.

Now, when the diameter of the synthetic resin part 10 is D and the diameter of the sphere 4 after coating the coating 11 is D, it is necessary to satisfy at least the condition O≦DI<Di, and Ol is It is preferable to be as close as possible to .

Furthermore, the thickness of the laminate l is T1, and the thickness of the intermediate N3 is T.
, it is necessary that D is less than 7. The occurrence of protrusions caused by the presence of the spheres 4 on the surface of the metal plate 2 can be suppressed.

Also, when the mutual spacing of the spheres 4 is l, 0>N<I
OT! It is preferable to set the mutual spacing of the spheres 4 so as to satisfy the condition of ~50 tz.

By satisfying each of the above conditions, the metal plates 2 on both sides can have good conductivity through the conductive coating 11 of the sphere 4, and therefore have good weldability.

Note that the coating 11 covering the sphere 4 is plated.

A strong coating may be formed by metal spraying, welding, or other methods.

Further, the sphere 4 only needs to have a conductive surface, and is not limited to a structure in which a conductive coating is applied to the surface of the internal synthetic resin portion.

e0 As described above, the laminate according to the present invention has a structure in which a large number of spheres having conductive surfaces are interposed in the intermediate layer of the laminate and are brought into contact with the metal plates on both sides.

Therefore, since the sphere is made of a material having the same weight as the intermediate layer, there is almost no increase in weight as a laminate, there is no change in appearance, and there is no deterioration in workability.

Furthermore, the spacing (density) of the spheres arranged in the laminate can be changed by adjusting the amount of trimming, and the cost is almost the same as that of conventional laminates.

[Brief explanation of drawings]

FIG. 1 is an explanatory cross-sectional view of the laminated plate according to the present invention, FIG. 2 is an enlarged cross-sectional explanatory view of the spherical portion, and FIG. 3 is an overall plan view of the laminated plate. 1... Laminate plate, 2... Metal plate, 3...
- Intermediate layer, 4... sphere, 11... film. Figure 3

Claims (1)

[Claims] 1) In a laminate having conductive metal layers on both outer sides and a non-conductive intermediate layer between them, a large number of spheres having conductive surfaces are dispersed in the intermediate layer, and 1. A conductive laminate, characterized in that the surface of the sphere is brought into contact with the inner surfaces of the metal layers on both outer sides. 2) The conductive laminate according to claim 1, wherein the sphere having a conductive surface is a non-conductive sphere coated with a conductive coating.