Sumitomo Electric Industries, Limited

Nayu Yanagawa

Taro Fujita

Shinya Nishikawa

Fumiaki Sato

Yoshiaki Nagao

Shigeyuki Tanaka

Yuto Kobayashi

Yuji Ochi

Masakazu Takami

Ryota Fukumoto

Yohei Suzuki

Nobuyuki Suzuki

Hiroyuki Okawa

Takumi Ooshima

Kenta Tsuchiya

Atsushi Tsujino

Kuushin Ryan

Satoshi Okano

Toyoaki Kimura

Masaki Hayakawa

Syota Machinaka

An optical cable according to an embodiment of the present disclosure is an optical cable for installation in a microduct, the optical cable including one or more optical-fiber core wires, and a sheath layer covering an outer peripheral side of the one or more optical-fiber core wires. The sheath layer has a density of 2.0 g/cmor less. The sheath layer contains an olefin-based resin, a silicone, and a non-halogen flame retardant. A mass ratio of the non-halogen flame retardant to the olefin-based resin is 0.90 to 2.00. A mass ratio of the silicone to the olefin-based resin is 0.005 to 0.100. The olefin-based resin contains a polyethylene, and an ethylene-vinyl acetate copolymer or an ethylene-ethyl acrylate copolymer. The silicone has a weight-average molecular weight of 50,000 to 1,000,000.

Optical cable

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

A weather-resistant flame-retardant resin composition includes: a polyolefin resin; a mixture of (poly) phosphate compounds, a total content of which is from 10 to 50 parts by mass with respect to 100 parts by mass of the polyolefin resin; 0.1 to 10 parts by mass a non-crosslinked silicone raw rubber having a number-average molecular weight of 10,000 to 1,000,000; and 0.1 to 20 parts by mass of an inorganic UV light shielding agent, and an electric wire and an optical fiber cable whose jacket is formed by the weather-resistant flame-retardant resin.

Weather-resistant flame-retardant resin composition, optical fiber cable, and electric wire

An optical fiber cable includes a plurality of intermittently connected optical fiber ribbons inside a cable sheath, in which a fibrous filler or an FRP using the fibrous filler is provided on at least one pair of diagonals of the two diagonal directions approximately orthogonal to each other inside the cable sheath. An average linear expansion coefficient of the fibrous filler at &#x2212;40&#xb0; C. to +70&#xb0; C. is smaller than an average linear expansion coefficient of the cable sheath at &#x2212;40&#xb0; C. to +70&#xb0; C.

Optical fiber cable

An optical fiber cable includes optical fiber ribbons, a slot rod and a cable jacket. The slot rod has slot grooves in which the optical fiber ribbons are housed. The cable jacket covers an outside of the slot rod. The optical fiber ribbons have, in a state in which optical fibers having an outer diameter of 0.22 mm or less are arranged in parallel, connecting portions at which adjacent ones of the optical fibers are connected to one another and non-connecting portions at which adjacent ones of the optical fibers are not connected to one another, which are provided intermittently in a longitudinal direction. A density of core number of the optical fibers included in the optical fiber cable is 4.8 cores/mmor more in a cross section of the optical fiber cable.

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 wire includes a conductor and an insulating layer covering an outer periphery of the conductor. The insulating layer is formed of a crosslinked polymer of an insulating resin composition that contains

Insulated electric wire and insulating resin composition

Growing community of inventors

Osaka, Japan

Nayu Yanagawa