Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1998-03-06
2000-10-24
Krynski, William
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428338, 428332, 428328, 428212, 428329, B32B 516
Patent
active
061364290
ABSTRACT:
An object of the present invention is to provide a shielding sheet which has a high and stable shieldability to electromagnetic waves, has a sufficient pliability, and can be easily wound around a cable and the like. The shielding sheets 1, 1', and 1" each having a pliable insulating layer 2, a powder layer 3 in which a powder 4 made of soft magnetic metal or alloy, having an average particle diameter of less than 100 .mu.m, is buried in layers along at least one surface of the insulating layer 2 and/or at the midpoint position along the thickness direction. It also includes a shielding sheet 1a in which a powder 4 is distributed in the middle portion 5 of the insulating layer 2 at the ratio of less than 70% by volume to the powder layer 3, 3 along both surfaces. Furthermore, shielding sheets 1, 1a, 1', and 1", in which a powder 4 of the powder layer is flat shaped, the aspect ratio being more than 2, and the powder is buried in a manner that the longer diameter direction of the powder is almost along the plane surface direction of the insulating layer 2, are also included within the scope of the present invention.
REFERENCES:
patent: 4992329 (1991-02-01), Ishii et al.
patent: 5260128 (1993-11-01), Ishii et al.
Daido Tokushukou Kabushiki Kaisha
Garrett Dawn L.
Krynski William
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