Conductive polymeric shielding materials and articles fabricated therefrom
AssigneeChamplain Cable Corporation
InventorMahmoud Aldissi
Life of this patent
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Abstract
The present invention features a new shield material useful in the fabrication of shielded wire or cable articles. The conductive core of the wire and cable is layered with a shielding wrapping tape, foil or film. A shielding insulation compound can also be extruded over the conductive wire or cable core. Wire and cable articles containing the new shield material have an extended interference frequency attenuation range resulting from the improved shield layer. The shield material contains shaped ferrite particles dispersed within a polymeric binder, such as a fluorocarbon polymer. The shaped particles are generally spherical.
Claims11
A shielded wire or cable article wherein EMI shielding is provided in a polymer shielding layer, comprising:
- a) at least one conductive core member;
- b) an insulation layer disposed over said at least one conductive core member;
- c) a shielding layer overlaying said insulation layer and comprising geometrically round shaped ferrite particles, or combinations of geometrically round shaped and non-geometrically round shaped ferrite particles, dispersed within a polymer matrix;
- and
- d) a jacket layer disposed over said shielding layer.
A shielded wire or cable article having EMI shielding, comprising:
- a) a conductive core member;
- b) an insulation layer disposed over said conductive core member;
- and
- c) a shielding layer overlaying said insulation layer and comprising geometrically round shaped ferrite particles selected from a group of spherical and cylindrical and combinations thereof, said particles dispersed within a polymer matrix.
A shielded cable article having EMI shielding, comprising:
- a) at least two conductive core members, each of said respective core members having an insulation layer disposed thereover to form a respective insulated core member, said insulated core members being grouped or twisted together;
- and
- b) a shielding layer overlaying said grouped or twisted insulated core members, said shielding layer comprising geometrically round shaped and non-geometrically round shaped ferrite particles, said geometrically round shaped and non-geometrically round shaped particles dispersed within a polymer matrix.
Dependencies are inferred from the claim text.