| 摘要 |
PURPOSE: To obtain an enough shielding effect with a small amount of a shielding material by a method in which a shielding means is a layer comprising a layer constituent material and an intermediate space, a corrugated layer and a flat layer are glued together in the area of each space, with the shielding means placed between them. CONSTITUTION: A corrugated board W is formed from a corrugated layer 1 glued to flat layers 2, 3 in wave top 100 areas, and a shielding means 4 containing carbon and/or graphite is inserted between the layers 3, 1. The shielding means 4 comprises interconnected layer components 80 with spaces 90 formed between them and is contacted with the surface of the layer 3. Each space 90 extends continuously to a surface 40. In the area of each space 90, the corrugated layer 1 is glued to the flat layer 3. It is advantageous to make a conductive material, such as a continuous coat 5 of a conductive lacquer contact at least one outer surface 30 of the layers 2, 3 in the corrugated board W. A conductive coat 6 can be formed on the other surface 30 of the layer 2. |
