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US 9,233,517 B2Granted
Electromagnetic shielding sheet
AssigneeAsahi Kasei Fibers Corporation
InventorsKazufumi Kato, Kazuaki Shikata, Rumina Obi, Ikuo Ueno
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AssigneeAsahi Kasei Fibers Corporation
InventorsKazufumi Kato, Kazuaki Shikata, Rumina Obi, Ikuo Ueno
Estimating the term…
Disclosed is an electromagnetic shielding sheet that has a smaller increase in the thickness of a base after the formation of a metal coating film when compared with conventional electromagnetic shielding sheets, and which has excellent electromagnetic wave shielding properties despite a small amount of adhered metal. According to the present invention, the electromagnetic shielding sheet can endure metal working processes and has high electromagnetic wave shielding properties, resulting in a thin, very flexible fabric sheet. Specifically disclosed is an electromagnetic shielding sheet which is composed of a laminated non-woven fabric that has at least a first layer and a second layer, and which is characterized in that the first layer is a layer of thermoplastic synthetic fibers having a fiber diameter of 6 μm to 50 μm, the second layer is a layer of ultrafine fibers having a fiber diameter of 0.1 μm to 5.0 μm, and a metal is adhered to at least one surface of the sheet.
An electromagnetic shielding sheet composed of a laminated non-woven fabric having a first layer, a second layer, and a third layer, wherein the first layer and the third layer are a thermoplastic synthetic fiber layer having a fiber diameter of 6 μm to 50 μm, the second layer is an ultrafine fiber layer having a fiber diameter of 0.1 μm to 5.0 μm, and a metal is adhered to at least one side of the sheet as a continuous layer, wherein the thickness of the laminated non-woven fabric is 10 μm to 100 μm, and wherein a percentage of exposed surface area on the surface of the ultrafine fiber layer is 5% or more.
Dependencies are inferred from the claim text.