Sumitomo Electric Industries, Limited

Yuji Ochi

Takaya Kohori

Satoshi Hashimoto

Takami Sagisaka

Masayuki Ishikawa

Yuto Kobayashi

Akihisa Hosoe

Taro Fujita

Kengo Goto

Nayu Yanagawa

Atsushi Tsujino

Shinya Nishikawa

Shigeyuki Tanaka

Yuhei Mayama

Seiji Endo

Motoi Matsuda

Satoshi Okano

Atsuko Shinomiya

Yoshihiro Hirakawa

Masaki Hayakawa

Syota Machinaka

Takaaki Okamoto

Ryuuta Furuyashiki

Kenichiro Iwama

A differential signal transmission cable includes: an insulating layer that extends along a longitudinal direction of the differential signal transmission cable; a pair of signal lines that extends along the longitudinal direction of the differential signal transmission cable and is buried in the insulating layer; and a shield that exists around an outer peripheral surface of the insulating layer.

Differential signal transmission cable

A coaxial cable includes an inner conductor, an insulation covering the inner conductor, an outer conductor covering the insulation, and a sheath covering the outer conductor. The inner conductor is a compressed conductor including a central element wire and multiple peripheral element wires surrounding the central element wire. The inner conductor has a compressibility of 23.0% or more and 35.0% or less in percentage. The compressibility is calculated from a sectional area S1 and the sectional area S2 of the compressed conductor by Compressibility=[1−S2/S1]. The sectional area S1 is calculated from the outside diameter D of the central element wire and the total number n of the central and peripheral element wires by S1=n×π×0.25×D. The outside diameter of the insulation is 1.25 mm or more and less than 1.75 mm.

Coaxial cable

A differential signal transmission cable includes an insulation layer extending in a longitudinal direction of the differential signal transmission cable, a pair of signal lines extending in the longitudinal direction and buried inside the insulation layer, an intermediate layer covering an outer circumferential surface of the insulation layer, a shield, and catalyst particles. The shield includes an electroless plating layer covering an outer circumferential surface of the intermediate layer. The catalyst particles are dispersed between the intermediate layer and the electroless plating layer.

A coaxial cable includes an inner conductor having one center wire, and six outer wires stranded around the center wire, an insulator covering an outer periphery of the inner conductor, and a shield conductor covering an outer periphery of the insulator, wherein, in a cross section perpendicular to a longitudinal direction of the coaxial cable, a ratio of a total area of first regions which are respectively formed by a gap between the center wire and two adjacent outer wires, with respect to an area of a circumscribed circle of the inner conductor, is 0.5% or higher and 2.0% or lower, and a ratio of a total area of second regions which are respectively formed by a gap between surfaces of the two adjacent outer wires and a surface of the insulator, with respect to the area of the circumscribed circle of the inner conductor, is 2.0% or higher and 5.0% or lower.

A resin composition for an insulating layer includes: an olefinic resin as a main component; and a metal deactivator, wherein the olefinic resin consists of block polypropylene and polyethylene, and wherein a content of the polyethylene in the olefinic resin is greater than or equal to 1% by mass and less than or equal to 10% by mass.

Resin composition for insulating layer, insulated electric wire, and cable

An insulated electric cable including: two first core wires, each of the two first core wires including: a first conductor; and a first insulating layer covering the first conductor; and two second core wires, each of the two second core wires including: a second conductor having a cross-sectional area smaller than that of the first conductor; and a second insulating layer covering the second conductor; wherein the two second core wires are mutually stranded to form a subunit, and wherein one of the two first core wires, another of the two first core wires, and the subunit are mutually stranded and are in contact with each other to form a core member.

Insulated electric cable

An insulated electric cablehas a core member I formed by stranding a plurality of core wires, each of the core wiresincluding a conductorand an insulating layercovering the conductor, an inner sheathcovering the core member I, an outer sheathcovering the inner sheath, and a paper tapedisposed between the core member I and the inner sheathin a state that it is wrapped around the core member I, in which the outer sheathis formed by a flame-retardant polyurethane resin, and a cross-sectional area of each of conductorsis within 0.18-3.0 mm2.

A twinax cableincludes a twinax structure, the twinax structure including: a signal wire pair, the signal wire pair including a pair of signal wires formed of a first signal wire and a second signal wire, and an insulating layer configured to cover the pair of signal wires; a drain wire; and a shield tape arranged on the outer circumferential side of the insulating layer to cover the signal wire pair and the drain wire. The insulating layer is mainly composed of polyethylene. The insulating layer includes not less than 30 ppm and not more than 4000 ppm of a hindered phenol-based antioxidant. A dielectric tangent tan &#x3b4; of the insulating layer at the time of application of a high-frequency electric field having a frequency of 10 GHz is not more than 3.0&#xd7;10.

Twinax cable and multi-core cable

An insulated electric cablehas a core memberformed by stranding a plurality of core wires, each of the core wiresincluding a conductorand an insulating layercovering the conductor, an inner sheathcovering the core member, an outer sheathcovering the inner sheath, and a paper tapedisposed between the core memberand the inner sheathin a state that it is wrapped around the core member, in which the outer sheathis formed by a flame-retardant polyurethane resin, and a cross-sectional area of each of conductorsis within 0.18-3.0 mm.

An object of the invention is to provide a cable capable of matching exposed dimensions of conductors with a predetermined dimension to perform good processing at the time of distal end processing. In a cable () in which a pair of insulated wires () each of which is formed by covering a conductor () with an insulator () is mutually stranded and a periphery of these stranded insulated wires () is covered with a sheath () made of an inner sheath () and an outer sheath (), the conductor () is formed by assembling a plurality of stranded wires () each of which is formed by wholly stranding a plurality of wires (), and by further wholly stranding the stranded wires ().

Cable

The present invention relates to a data transmission cable and the like including a structure reducing the frequency dependence of cable attenuation in digital transmission, thereby suppressing signal distortions. The data transmission cable includes at least a pair of conductors, each coated with an insulator, extending along a predetermined direction; and a shield tape, provided so as to surround the conductors, including a metal layer. In particular, in the shield tape, the metal layer has a thickness of 1 &mgr;m or more but 10 &mgr;m or less, preferably 2 &mgr;m or more but 6 &mgr;m or less.

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Kanuma, Japan

Yuji Ochi