Composite sheet material for magnetic and electronic shielding and product obtained therefrom
First Claim
1. A composite sheet material for magnetic and electronic shielding, comprising:
- a composite sheet metal including an electrodeposited iron foil with a thickness of 10-50 microns, and a pair of metal plating layers on opposite surfaces of said electrodeposited iron foil; and
a covering layer formed on at least one of said pair of metal plating layers of the composite sheet metal, said covering layer comprising at least one layer of sheet material which is bonded to the respective surface of the composite sheet metal with an adhesive layer interposed therebetween, wherein each of said metal plating layers consists of a first plating layer formed of a highly electrically conductive metal selected from the group consisting of zinc, tin, nickel, chromium and copper, and a second plating layer formed of lead on said first plating layer.
1 Assignment
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Accused Products
Abstract
Composite sheet material, used for shielding magnetism and electromagnetic waves, principally made of an electrodeposited iron foil, as the core, with a thickness of at least 10 μm which is applied on either side surface thereof a plating layer with a respectively predetermined metal, and of, a covering layer which is formed of a suitable sheet-like material and which is to be laminated on at least one of the two plating layers through the medium of an adhesive layer. A variety of products utilizing this composite sheet material as an essential elements thereof which stretches over a wide field wherein magnetic and electronic shield is required, for example: magnetic-card holders; magnetic-card protection cases or boxes; envelopes and containers for keeping and transporting magnetic recording media; wallpapers for various special rooms, etc.
89 Citations
19 Claims
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1. A composite sheet material for magnetic and electronic shielding, comprising:
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a composite sheet metal including an electrodeposited iron foil with a thickness of 10-50 microns, and a pair of metal plating layers on opposite surfaces of said electrodeposited iron foil; and a covering layer formed on at least one of said pair of metal plating layers of the composite sheet metal, said covering layer comprising at least one layer of sheet material which is bonded to the respective surface of the composite sheet metal with an adhesive layer interposed therebetween, wherein each of said metal plating layers consists of a first plating layer formed of a highly electrically conductive metal selected from the group consisting of zinc, tin, nickel, chromium and copper, and a second plating layer formed of lead on said first plating layer. - View Dependent Claims (17, 18, 19)
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2. A composite sheet material for magnetic and electronic shielding, comprising:
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a composite sheet metal including an electrodeposited iron foil with a thickness of at least 10 μ
m and not more than 50 μ
m, and a pair of metal plating layers on opposite surfaces of said electrodeposited iron foil, said metal plating layers being formed of a metal selected from the group consisting of zinc, tin, nickel, chromium, copper and lead; anda covering layer formed on at least one of said pair of metal plating layers of the composite sheet metal, said covering layer comprising at least one layer of sheet material which is bonded to the respective surface of the composite sheet metal with an adhesive layer interposed therebetween, wherein said covering layer is formed on each of said pair of metal layers of the composite sheet metal, and further comprising a pressure sensitive adhesive layer formed on one of the covering layers and a release liner adhering to said pressure sensitive adhesive layer. - View Dependent Claims (3, 4)
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5. A composite sheet material for magnetic and electronic shielding, comprising:
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a composite sheet metal including an electrodeposited iron foil with a thickness of at least 10 μ
m and not more than 50 μ
m, and a pair of metal plating layers on opposite surfaces of said electrodeposited iron foil, said metal plating layers being formed of a metal selected from the group consisting of zinc, tin, nickel, chromium, copper and lead; anda covering layer formed on at least one of sad pair of metal plating layers of the composite sheet metal, said covering layer comprising at least one layer of sheet material which is bonded to the respective surface of the composite sheet metal with an adhesive layer interposed therebetween, wherein said covering layer is formed on each of said pair of metal plating layers of the composite sheet metal, one of said covering layers consisting of a flame retardant plastic sheet, the other covering layer consisting of a flame retardant foam plastic sheet.
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6. A composite sheet material for magnetic and electronic shielding, comprising:
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a composite sheet metal including an electrodeposited iron foil with a thickness of at least 10 μ
m and not more than 50 μ
m, and a pair of metal plating layers on opposite surfaces of said electrodeposited iron foil, said metal plating layers being formed of a metal selected from the group consisting of zinc, tin, nickel, chromium, copper and lead; anda covering layer formed on at least one of said pair of metal plating layers of the composite sheet metal, said covering layer comprising at least one layer of sheet material which is bonded to the respective surface of the composite sheet metal with an adhesive layer interposed therebetween, wherein said covering layer is formed on one of said metal plating layers, and further comprising a pressure sensitive ahdesive layer formed on the other metal plating layer, and a release liner adhering to said pressure sensitive adhesive layer. - View Dependent Claims (7, 8)
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9. An electrical conductor assembly for magnetic and electronic shielding, comprising:
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a plate shaped electrical conductor body including a plurality of mutually independent electrical conducting members, and insulating layers sandwiching said conducting members; a composite sheet metal disposed on at least one side of said electrical conductor body, and including an electrodeposited iron foil having a thickness of 10-50 microns, and a pair of metal plating layers on opposite surfaces of said electrodeposited iron foil; and a covering layer formed on at least one of said pair of metal plating layers of the composite sheet metal, said covering layer comprising at least one layer of sheet material which is bonded to the respective surface of the composite sheet metal with an adhesive layer interposed therebetween, wherein each of said metal plating layers consists of a first plating layer formed of a highly electrically conductive metal selected from the group consisting of zinc, tin, nickel, chromium and copper, and a second plating layer formed of lead on said first plating layer.
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10. A corrugated packaging material for magnetic and electronic shielding, of corrugated fiberboard construction comprising at least one corrugated medium layer, and a pair of liner layers adhering to opposite surfaces of said corrugated medium layer, wherein the improvement comprises:
said at least one corrugated medium layer or at least one of said liner layers is formed of a composite sheet metal including an electrodeposited iron foil having a thickness of at least 10 μ
m and not more than 50 μ
m, and a pair of metal plating layers on opposite surfaces of said electrodeposited iron foil, said metal plating layers being formed of a metal selected from the group consisting of zinc, tin, nickel, chromium, copper and lead.- View Dependent Claims (11, 12, 13, 14, 15, 16)
Specification