Abstract: A covering material includes: a resin component containing at least one of a crosslinkable resin having photo crosslinkability and thermal crosslinkability and a crosslinkable monomer having photo crosslinkability and thermal crosslinkability; a photoinitiator; and a thermal initiator. A cable includes a core and the covering material that covers the core. A method of manufacturing a cable includes covering a core with a covering material and crosslinking the covering material, wherein the covering material includes: a resin component containing at least one of a crosslinkable resin having photo crosslinkability and thermal crosslinkability and a crosslinkable monomer having photo crosslinkability and thermal crosslinkability; a photoinitiator; and a thermal initiator.

Abstract: A differential signal transmission cable includes an insulated wire section including a pair of signal line conductors extending parallel to each other for transmitting a differential signal and an insulation covering the pair of signal line conductors, and a shield conductor including a band-shaped metal foil and spirally wound around the insulate wire section so as to overlap at a portion in a width direction thereof. An allowable elongation of the shield conductor as a stretchable limit in a longitudinal direction without breaking is not less than 2% at normal temperature.

Abstract: A differential signal cable includes a pair of signal line conductors for transmitting differential signals, an insulation collectively covering the pair of signal line conductors, a shielding tape wrapped around the insulation, and an insulating tape wound around the shielding tape. A gap is formed between an outer peripheral surface of the insulation and an inner surface of the shielding tape such that the insulation is movable relative to the shielding tape.

Abstract: A differential signal transmission cable includes an insulated wire section including a pair of signal line conductors extending parallel to each other for transmitting a differential signal and an insulation covering the pair of signal line conductors, and a shield conductor including a band-shaped metal foil and spirally wound around the insulate wire section so as to overlap at a portion in a width direction thereof. An allowable elongation of the shield conductor as a stretchable limit in a longitudinal direction without breaking is not less than 2% at normal temperature.

Abstract: A coaxial cable includes a center conductor, an insulating foam provided to cover an outer periphery of the center conductor, and a protruding portion provided around an outer surface of the insulating foam to absorb stress. The protruding portion has a waved shape that oscillates in a circumferential direction of the insulating foam.

Abstract: A differential signal cable includes a pair of signal line conductors for transmitting differential signals, an insulation collectively covering the pair of signal line conductors, a shielding tape wrapped around the insulation, and an insulating tape wound around the shielding tape. A gap is formed between an outer peripheral surface of the insulation and an inner surface of the shielding tape such that the insulation is movable relative to the shielding tape.

Abstract: A differential signal transmission cable includes a pair of differential signal lines arranged in parallel to each other, an insulation for bundle-covering the pair of differential signal lines, and a shield conductor wound around an outer periphery of the insulation. The insulation is configured such that an outer circumference thereof in a cross section perpendicular to a longitudinal direction thereof has an oval shape formed with a continuous convex arc-curve. The outer circumference of the insulation includes a first curved portion with a pair of symmetrical elliptical arcs located at both ends in a first direction along the arrangement direction of the pair of differential signal lines and a second curved portion with a pair of symmetrical elliptical arcs located at both ends in a second direction orthogonal to the first direction.

Abstract: A differential signal transmission cable includes two core wires, and a foamed insulation that collectively covers the two core wires by foaming extrusion molding. The foamed insulation is not more than 5% in a dispersion of foaming degree defined below in a cut surface when the cable is cut orthogonally to a longitudinal direction of the cable. In the cut surface, five regions are determined according to a predetermined procedures and a foaming degree (%) of the respective regions is measured. The dispersion of the foaming degree is defined by a difference between a foaming degree (%) in the region with a maximum foaming degree and a foaming degree (%) in the region with a minimum foaming degree.

Abstract: A differential transmission cable includes at least one pair of inner conductors arranged in parallel and extending parallel to each other, and a foamed insulating material formed on the inner conductors by a collective extrusion coating and molding of a resin material by using a chemical foaming method and have a variation of foaming degree of not more than 1%. The variation of foaming degree is defined as a difference between a maximum value and a minimum value among foaming degrees (%) of the foamed insulating material at 20 positions at intervals of 50 cm in a longitudinal direction in an arbitrary part of 10 m cut out from the differential transmission cable.

Abstract: A parallel foamed coaxial cable includes one or more pairs of inner conductors aligned in parallel, a foamed insulation covering together the inner conductors and having a cross sectional shape including an elliptical shape, a rounded-rectangular shape or a quasi-elliptical shape formed by combining a plurality of curved lines, a non-foamed skin layer covering the foamed insulation and having a maximum thickness in a major axis direction of the cross sectional shape of the foamed insulation and a minimum thickness in a minor axis direction of the cross sectional shape of the foamed insulation, an outer conductor covering the non-foamed skin layer, and an insulation jacket covering the outer conductor. The maximum thickness of the non-foamed skin layer is not less than 1% of a major axis of the cross sectional shape of the foamed insulation.

Abstract: A connection structure for connecting an outer conductor of a differential signal transmission cable to a substrate includes a connecting member including a main body portion and a protruding portion protruding from the main body portion. The outer conductor is connected via the connecting member to the substrate. The connecting member is solder-connected to the outer conductor via the main body portion and is solder-connected to the substrate via the protruding portion.

Abstract: A coaxial cable includes a center conductor, an insulating layer including a foam layer covering an outer periphery of the center conductor and a solid layer covering an outer periphery of the foam layer, and a protruding portion provided around an interface between the foam layer and the solid layer and in a longitudinal direction of the solid layer, to disperse external force.

Abstract: A coaxial cable includes a center conductor, an insulating foam provided to cover an outer periphery of the center conductor, and a protruding portion provided around an outer surface of the insulating foam to absorb stress. The protruding portion has a waved shape that oscillates in a circumferential direction of the insulating foam.

Abstract: A resin composition includes a polyolefin resin. A viscosity of the resin composition is within a range of not less than 500 Pa·s and not more than 2300 Pa·s under measurement conditions of a measurement temperature of 170° C. and a measurement frequency of 1 Hz. A strain hardening rate of the resin composition in uniaxial elongational viscosity measured under measurement conditions of a measurement temperature of 150° C. and a strain rate of 3.0 s?1 is not less than 800%. A foam insulated wire includes a conductor, and a foam insulation of the resin composition extruded on an outer periphery of thereof. A diameter of the conductor is 3.5 to 18 mm, and an outer diameter of the foam insulation is not less than 8 mm.

Abstract: A differential signal transmission cable includes two core wires, and a foamed insulation that collectively covers the two core wires by foaming extrusion molding. The foamed insulation is not more than 5% in a dispersion of foaming degree defined below in a cut surface when the cable is cut orthogonally to a longitudinal direction of the cable. In the cut surface, five regions are determined according to a predetermined procedures and a foaming degree (%) of the respective regions is measured. The dispersion of the foaming degree is defined by a difference between a foaming degree (%) in the region with a maximum foaming degree and a foaming degree (%) in the region with a minimum foaming degree.

Abstract: A differential signal transmission cable includes a pair of differential signal lines arranged in parallel to each other, an insulation for bundle-covering the pair of differential signal lines, and a shield conductor wound around an outer periphery of the insulation. The insulation is configured such that an outer circumference thereof in a cross section perpendicular to a longitudinal direction thereof has an oval shape formed with a continuous convex arc-curve. The outer circumference of the insulation includes a first curved portion with a pair of symmetrical elliptical arcs located at both ends in a first direction along the arrangement direction of the pair of differential signal lines and a second curved portion with a pair of symmetrical elliptical arcs located at both ends in a second direction orthogonal to the first direction.

Abstract: A differential signal transmission cable includes a pair of differential signal lines arranged in parallel to each other, an insulation for bundle-covering the pair of differential signal lines, and a shield conductor wound around an outer periphery of the insulation. The insulation is configured such that an outer circumference thereof in a cross section perpendicular to a longitudinal direction thereof has an oval shape formed with a continuous convex arc-curve. The oval shape has a width in a first direction along the arrangement direction of the pair of differential signal lines being larger than a width in a second direction orthogonal to the first direction.

Abstract: A differential transmission cable includes at least one pair of inner conductors arranged in parallel and extending parallel to each other, and a foamed insulating material formed on the inner conductors by a collective extrusion coating and molding of a resin material by using a chemical foaming method and have a variation of foaming degree of not more than 1%. The variation of foaming degree is defined as a difference between a maximum value and a minimum value among foaming degrees (%) of the foamed insulating material at 20 positions at intervals of 50 cm in a longitudinal direction in an arbitrary part of 10 m cut out from the differential transmission cable.

Abstract: A parallel foamed coaxial cable includes one or more pairs of inner conductors aligned in parallel, a foamed insulation covering together the inner conductors and having a cross sectional shape including an elliptical shape, a rounded-rectangular shape or a quasi-elliptical shape formed by combining a plurality of curved lines, a non-foamed skin layer covering the foamed insulation and having a maximum thickness in a major axis direction of the cross sectional shape of the foamed insulation and a minimum thickness in a minor axis direction of the cross sectional shape of the foamed insulation, an outer conductor covering the non-foamed skin layer, and an insulation jacket covering the outer conductor. The maximum thickness of the non-foamed skin layer is not less than 1% of a major axis of the cross sectional shape of the foamed insulation.