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US 4,678,699 AGranted
Stampable polymeric composite containing an EMI/RFI shielding layer
AssigneeAllied Corporation
InventorsGina R. Kritchevsky, John A. Gregor, Manfred W. Gruendig, Gregory J. Sellers, Barbara Liss
Life of this patent
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Abstract
A stampable thermoplastic composite having at least one thermoplastic layer and at least one shielding layer. The shielding layer comprises a material having an elongation to break of at least 8 percent, and the composite having an EMI/RFI shielding effectiveness of at least 30 db.
Claims16
A stamped thermoplastic composite comprising:
- at least one thermoplastic layer;
- and at least one shielding layer, the shielding layer comprising at least one layer of thermoplastic woven fiber containing metal fiber and having an elongation to break of at least 8 percent and an EMI/RFI shielding effectiveness of at least 30 dB, and the stamped composite having been elongated at least 8 percent without holes formed by tearing of the shielding layer during stamping.
A stampable thermoplastic composite comprising:
- at least one thermoplastic layer;
- and at least one shielding layer, the shielding layer comprising at least one layer of thermoplastic woven fabric containing metal fiber having an elongation to break of at least 8 percent, and the composite having an EMI/RFI shielding effectiveness of at least 30 dB.
A method comprising the step of stamping a thermoplastic composite comprising:
- at least one thermoplastic layer;
- and at least one shielding layer, the shielding layer comprising at least one layer of thermoplastic woven fiber containing metal fiber and having an elongation to break of at least 8 percent and an EMI/RFI shielding effectiveness of at least 30 dB, and the stamped composite having been elongated at least 8 percent without holes formed by tearing of the shielding layer during stamping.
Dependencies are inferred from the claim text.