# US 10,373,739 B2 · Carbon nanotube shielding for transmission cables > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,373,739 B2 - Document ID: US10373739B2 - Status: Granted - Kind: B2 - Application number: 15/950,485 - Filed: 2018-04-11 - Published: 2018-08-16 - Granted: 2019-08-06 - Earliest claimed: 2015-12-08 - Assignees: The Boeing Company - Applicants: The Boeing Company - Inventors: Zeaid F. Hasan; Jade M. Brown; Daniel J. Braley; Jacob Battat; John H. Belk; Joseph B. Harriman - Web page: https://patentgrep.com/patent/US10373739B2 ## CPC - H01B 9/023: {composed of helicoidally wound tape-conductors} - C01B 32/158: Carbon nanotubes - H01B 1/24: the conductive material comprising carbon-silicon compounds, carbon or silicon - H01B 11/183: {Co-axial cables with at least one helicoidally wound tape-conductor} - B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites - H01B 13/26: by winding, braiding or longitudinal lapping - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES ## Abstract A transmission cable may include a conductor core, an insulator layer surrounding the conductor core, and a shielding layer surrounding the insulator layer, wherein the shielding layer includes a carbon nanotube sheet material. ## Claims ### Claim 1 A cable comprising: a conductor core; an insulator layer surrounding said conductor core; and a shielding layer surrounding said insulator layer, wherein said shielding layer comprises a carbon nanotube sheet material comprising: a permeable carrier material formed from one of a woven fabric and a nonwoven fabric, said carrier material comprising a first surface and a second surface; and discontinuous carbon nanotubes that are entangled together to form a nonwoven network, wherein said nonwoven network of said discontinuous carbon nanotubes is compressably coupled to said first surface of said carrier material; and a metallic coating that is applied to said second surface of said carrier material. ### Claim 2 (depends on 1) The cable of claim 1 wherein said carbon nanotubes comprise a diameter ranging from approximately 1 nanometer to approximately 50 nanometers and a length ranging from approximately 0.5 millimeters to approximately 4 millimeters. ### Claim 3 (depends on 1) The cable of claim 1 wherein said carbon nanotube sheet material comprises first ones of said carbon nanotubes comprising a first length ranging from approximately 0.5 millimeters to approximately 1 millimeter and second ones of said carbon nanotubes comprising a second length ranging from approximately 1 millimeter to approximately 4 millimeters. ### Claim 4 (depends on 1) The cable of claim 1 wherein said carbon nanotube sheet material further comprises discontinuous thermoplastic filaments entangled together and entangled with said carbon nanotubes to form said nonwoven network coupled to said carrier material. ### Claim 5 (depends on 4) The cable of claim 4 wherein said thermoplastic filaments comprise a diameter of approximately 18,000 nanometers and a length of approximately 6 millimeters. ### Claim 6 (depends on 1) The cable of claim 1 wherein said carbon nanotube sheet material is wrapped around said insulator layer. ### Claim 7 (depends on 1) The cable of claim 1 wherein said shielding layer further comprises a plurality of strips of said carbon nanotube sheet material spiral wound around said insulator layer. ### Claim 8 (depends on 1) The cable of claim 1 wherein said conductor core comprises a roll of said carbon nanotube sheet material. ### Claim 9 (depends on 8) The cable of claim 8 wherein said carbon nanotube sheet material further comprises discontinuous thermoplastic filaments entangled together and entangled with said carbon nanotubes to form said nonwoven network coupled to said carrier material. ### Claim 10 (depends on 1) The cable of claim 1 wherein said conductor core comprises a bundle of rolls of said carbon nanotube sheet material. ### Claim 11 (depends on 1) The cable of claim 1 wherein said carrier material comprises a nonwoven carbon fiber veil. ### Claim 12 (depends on 1) The cable of claim 1 wherein said carrier material comprises a woven polyethylene terephthalate mat. ### Claim 13 (depends on 1) The cable of claim 1 wherein said metallic coating applied to said second surface of said carrier material is in contact with said insulator layer. ### Claim 14 (depends on 1) The cable of claim 1 wherein: said nonwoven network of said discontinuous carbon nanotubes is compressably coupled to said first surface of said carrier material using heated rollers; and said metallic coating is applied to said second surface of said carrier material using at least one of electroless plating, electroplating, and chemical vapor deposition. ### Claim 15 A cable comprising: a conductor core, wherein said conductor core comprises a carbon nanotube sheet material; an insulator layer surrounding said conductor core; and a shielding layer surrounding said insulator layer, wherein said shielding layer comprises said carbon nanotube sheet material; and wherein said carbon nanotube sheet material comprises: a permeable carrier material formed from one of a woven fabric and a nonwoven fabric, said carrier material comprising a first surface and a second surface, opposite said first surface; discontinuous carbon nanotubes that are entangled together to form a nonwoven network, wherein said nonwoven network of said discontinuous carbon nanotubes is compressably coupled to said first surface of said carrier material and shields against electromagnetic interference at frequencies greater than approximately one hundred megahertz; and a metallic coating that is applied to said second surface of said carrier material, wherein said metallic coating shields against said electromagnetic interference at frequencies between approximately zero hertz and one hundred megahertz. ### Claim 16 (depends on 15) The cable of claim 15 wherein said conductor core further comprises at least one roll of said carbon nanotube sheet material. ### Claim 17 (depends on 15) The cable of claim 15 wherein said carrier material comprises one of a nonwoven carbon fiber veil or a woven polyethylene terephthalate mat. ### Claim 18 A method for making a cable comprising: placing an insulator layer to surround a conductor core; and wrapping a carbon nanotube sheet material around said insulator layer to form a shielding layer surrounding said insulator layer and said conductor core, said carbon nanotube sheet material comprising: a permeable carrier material formed from one of a woven fabric and a nonwoven fabric, said carrier material comprising a first surface and a second surface, opposite said first surface; and discontinuous carbon nanotubes that are entangled together to form a nonwoven network, wherein said nonwoven network of said discontinuous carbon nanotubes is compressably coupled to first surface of said carrier material; and a metallic coating that is applied to said second surface of said carrier material. ### Claim 19 (depends on 18) The method of claim 18 wherein said carbon nanotube sheet material further comprises discontinuous thermoplastic filaments entangled together and entangled with said carbon nanotubes to form said nonwoven network coupled to said carrier material. ### Claim 20 (depends on 18) The method of claim 18 further comprising: forming another carbon nanotube sheet material; and rolling said another carbon nanotube sheet material into at least one roll to form said conductor core.