Abstract: Shielding materials are fabricated from a new three-layered particle having a core, a metal layer, and a conductive polymer layer. The new particles are blended into a polymer matrix and processed in the absence or under the influence of a magnetic field to form single-layered coatings and freestanding films and sheets. The magnetically processed materials yield a conductive network of particles rather than discrete particles randomly disposed within the polymeric medium.

Abstract: The present invention features a shielded wire and cable article capable of meeting stringent aerospace specifications and requirements, particularly those pertaining to low weight and high temperature. The article generally consists of an inner conductive core of one or more wires that can be twisted or braided and which can be individually insulated. The conductive core is surrounded by one or more thin layer(s) of insulation about which the shielding of this invention is overlaid. The shielding is made of a woven, braided or served mesh or woven yarn of metal-coated high-performance fibers. The fibers of the mesh or yarn are characterized by high-tensile strength and flexibility and are operative at high temperatures, equal to or exceeding 150.degree. C. When the fibers themselves are braided, the resulting mesh can be braided even more tightly about the interior insulation surface than can conventional meshes.

Abstract: This invention features an assembly that creates a strong bond connection between a conductive polymeric element of a cable, such as a polymeric conductive core or polymeric conductive shield layer, and an electrical connector. The invention features two components: a newly styled connector, and an intermediate sleeve. The newly styled connector is made of an inner, concave, bullet-shaped recess that fits within an outer, deformable shell. The intermediate sleeve joins the polymeric element of the cable and the electrical connector. The sleeve consists of two sections. The first section has a solid, convex, bullet-shaped nose portion that fits into the concave, bullet-shaped recess located in the connector. The two bullet-shaped male and female surfaces mate with each other; they are metallic, so that they are easily solderable.

Abstract: The present invention features a new "filter line" cable having a temperature-enhancement jacket layer composed of, in various forms, a Teflon layer or fused Teflon/Kapton layers. The filter line cable has a conductive core having a primary insulation layer. Over the primary insulation is a filtering layer made up, at least in part, of ferromagnetic particles (ferrite or magnetite) within a polymeric matrix such as Viton, a fluorinated elastomeric polymer. These ferromagnetic particles may or may not be metal-coated. In addition, they may also be "spherical", to enhance the filtering effect. The filtering layer provides the "filter line" protection against internal RFI and microwave interferences traveling down the wire.

Abstract: The present invention features a new "filter line" cable having a shield layer of metallized, high-tensile strength fibers. The filter line cable has a conductive core having a primary insulation layer. Over the primary insulation is a filtering layer made up of ferromagnetic particles (ferrite o magnetite) within a polymeric matrix such as Viton, a fluorinated elastomeric polymer. The filtering layer provides the "filter line" protection against internal RFI and microwave interferences traveling down the wire. A shield of metal-coated, high-tensile strength fibers (such as nylon, aramid, etc.) is woven or served to provide a flexible mesh layer of about 95% coverage; this is placed over the filtering layer. The shield layer provides protection against external EMI interference signals. An insulating-jacket layer is placed over the shield layer; it is made of materials such as Teflon, Kapton, fluorinated polyethylenes, carbon-filled fluorinated polyethylenes and combinations thereof, etc.

Abstract: The present invention features a new "filter line" cable of very thin construction. The thinner cable has a reinforcing mesh layer that lends physical strength to the otherwise thinner, weakened cable. Additionally, the reinforcing mesh provides grounding and some shielding. The reinforcing mesh layer is made of a thin metal wire or metal-coated fibers. The filter line cable has a conductive core having a primary insulation layer. Over the primary insulation is a filtering layer made up of metal-coated ferromagnetic particles of ferrite or magnetite dispersed within a polymeric matrix such as Viton, a fluorinated elastomeric polymer. The ferromagnetic particles may be "spherical", to enhance the filtering effect. The filtering layer provides the "filter line" protection against internal RFI and microwave interferences traveling down the wire. Over the filtering layer is a layer of metal wire or metal-coated fibers, woven or served into a mesh.

Abstract: The present invention is a method of fabricating a wire and cable article capable of meeting stringent aerospace specifications and requirements, particularly that of low weight. The article generally comprises an inner conductive central core of one or more metal-coated fibers. The conductive core is preferably comprised of silver-coated aramid fibers having a silver coating of greater than 30 wt. % of the fiber, and generally several hundred weight percent thereof. The silver is coated upon aramid fibers to provide a cable having approximately half the weight and approximately 15 times the tensile strength of cables having equivalent resistance and/or equivalently sized cores of silver plated copper. The metal coating of the inventive process is accomplished in two steps: (a) a high tensile strength fiber comprising nylon, aramid, etc., is first plated with a first layer of metal such as copper, silver, etc.; and then (b) electrochemically plated with a second layer of metal.

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.

Abstract: The present invention features a shielded wire and cable article capable of meeting stringent aerospace specifications and requirements, particularly that of low weight. The article generally comprises an inner conductive core of one or more wires that can be bare or individually insulated, and that can be straight, twisted or braided within the core. The core can also comprise a multicore consisting of a plurality of core members. The conductive core is surrounded by one or more thin layer(s) of insulation about which the shielding of this invention is applied. The shielding comprises a braided or served mesh or woven yarn of metallically coated fibers, characterized by high tensile strength and flexibility. Where the fibers themselves are braided, the resulting mesh can be braided more tightly about the interior insulation surface than can conventional meshes.

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 metal-coated magnetic particles dispersed within a polymeric binder, such as a fluorocarbon polymer. Other particles of metal such as copper, silver, nickel, manganese, zinc, or silver-coated copper in combination with metal coated and non-coated ferrites and magnetites dispersed within the polymer matrix may also be part of the blend formulation. The shielded wire or cable attenuates both RFI/EMI and microwave/radar interferences.

Abstract: The present invention features a new type of filter line cable. The new filter line in one embodiment thereof, comprises a cable having a conductive core member. A first insulation layer is disposed over the conductive core member. A first shielding layer of ferrite particles dispersed within a polymeric matrix is then overlayed the first insulation layer. A second insulation layer is then disposed over the first shielding layer. A second shielding layer of braided or served metallic mesh overlays the second insulation layer. A jacket layer overlays the second shielding layer and comprises a cross-linked, polymeric matrix containing approximately between 10 wt. % and 35 wt. % carbon black.

Abstract: The present invention features a shielded wire and cable article capable of operating more effectively in high power environments. The article generally comprises an inner conductive core of one or more wires that can be twisted or braided and which can be individually insulated. The conductive core is surrounded by one or more thin layer(s) of insulation about which conventional, braided or served mesh shielding is applied. The shielding effectiveness is improved in accordance with this invention by the addition of a layer of conductive polymer material above or below the braided or served mesh.

Abstract: The present invention features a shielded wire and cable article capable of meeting stringent aerospace specifications and requirements, particularly that of low weight. The article generally comprises an inner conductive core of one or more wires that can be bare or individually insulated, and that can be straight, twisted or braided within the core. The core can also comprise a multicore consisting of a plurality of core members. The conductive core is surrounded by one or more thin layer(s) of insulation about which the shielding of this invention is applied. The shielding comprises a braided or served mesh or woven yarn of metallically coated fibers, characterized by high tensile strength and flexibility. Where the fibers themselves are braided, the resulting mesh can be braided more tightly about the interior insulation surface than can conventional meshes.

Abstract: Processable conductive polymers including an oxidized, polymerized aromatic heterocyclic monomer, e.g., pyrrole, an stabilizing effective amount of a poly(vinyl acetate) and dopant anions, and a process of preparing said processable conductive polymers directly in a nonaqueous medium such as methyl acetate, methyl formate, ethyl formate, and propyl formate are disclosed.

Abstract: Processable electrically conductive latex polymer compositions including colloidal particles of an oxidized, polymerized aromatic heterocyclic monomer, a stabilizing effective amount of a vinyl pyridine-containing polymer and dopant anions and a method of preparing such polymer compositions are disclosed.

Abstract: Processable electrically conductive latex polymer compositions including colloidal particles of an oxidized, polymerized amino-substituted aromatic monomer, a stabilizing effective amount of a random copolymer containing amino-benzene type moieties as side chain constituents, and dopant anions, and a method of preparing such polymer compositions are provided.

Abstract: Polymers which are soluble in water and are electrically conductive. The monomer repeat unit is a thiophene or pyrrole molecule having an alkyl group substituted for the hydrogen atom located in the beta position of the thiophene or pyrrole ring and having a surfactant molecule at the end of the alkyl chain. Polymers of this class having 8 or more carbon atoms in the alkyl chain exhibit liquid crystalline behavior, resulting in high electrical anisotropy. The monomer-to-monomer bonds are located between the carbon atoms which are adjacent to the sulfur or nitrogen atoms. The number of carbon atoms in the alkyl group may vary from 1 to 20 carbon atoms. The surfactant molecule consists of a sulfonate group, or a sulfate group, or a carboxylate group, and hydrogen or an alkali metal. Negative ions from a supporting electrolyte which may be used in the electrochemical synthesis of a polymer may be incorporated into the polymer during the synthesis and serve as a dopant to increase the conductivity.

Abstract: Polymers which are soluble in water and are electrically conductive. The monomer repeat unit is a thiophene or pyrrole molecule having an alkyl group substituted for the hydrogen atom located in the beta position of the thiophene or pyrrole ring and having a surfactant molecule at the end of the alkyl chain. Polymers of this class having 8 or more carbon atoms in the alkyl chain exhibit liquid crystalline behavior, resulting in high electrical anisotropy. The monomer-to-monomer bonds are located between the carbon atoms which are adjacent to the sulfur or nitrogen atoms. The number of carbon atoms in the alkyl group may vary from 1 to 20 carbon atoms. The surfactant molecule consists of a sulfonate group, or a sulfate group, or a carboxylate group, and hydrogen or an alkali metal. Negative ions from a supporting electrolyte which may be used in the electrochemical synthesis of a polymer may be incorporated into the polymer during the synthesis and serve as a dopant to increase the conductivity.

Abstract: Polymers with conjugated backbones, both polyacetylene and polyaromatic heterocyclic types, are doped with electron-donor agents to increase their electrical conductivity. The electron-donor agents are either electride dopants made in the presence of lithium or dopants derived from alkalides made in the presence of lithium. The dopants also contain a metal such as cesium and a trapping agent such as a crown ether.

Abstract: An electrically conductive block copolymer of polyisoprene and polyacetyl and a method of making the same are disclosed. The polymer is prepared by first polymerizing isoprene with n-butyllithium in a toluene solution to form an active isoprenyllithium polymer. The active polymer is reacted with an equimolar amount of titanium butoxide and subsequently exposed to gaseous acetylene. A block copolymer of polyisoprene and polyacetylene is formed. The copolymer is soluble in common solvents and may be doped with I.sub.2 to give it an electrical conductivity in the metallic regime.