Sumitomo Electric Industries, Limited

Hitachi Cable, Inc.

Hitachi Metals, Ltd.

Shuhei Yasuda

Takanori Yamazaki

Shinya Nishikawa

Takashi Aoyama

Tomiya Abe

Hiroshi Hayami

Yoshiyuki Inoue

Kiyoshi Watanabe

Ryota Fukumoto

Hisao Furuichi

Yoitsu Sekiguchi

Akira Yamaura

Yoshinao Murata

Tomohiko Katayama

Akira Domoto

Shoshi Katakai

Tatsuji Ishibashi

A non-ohmic composition including a base elastomer and a plurality of non-ohmic particles, wherein, in a case of comparing volume resistivities ρ for the non-ohmic composition within a range of E≥Efor the non-ohmic composition not elongated, the E being an electric field strength applied to the non-ohmic composition, the ρ being the volume resistivity of the non-ohmic composition, and the Ebeing a threshold electric field strength at a point where an absolute value of a variation in a slope of log ρ with respect to log E is maximum, the volume resistivity ρ for the non-ohmic composition uniaxially elongated by 50% is 50 times or less the volume resistivity ρ for the non-ohmic composition not elongated.

Non-ohmic composition, cable connection unit, and method for producing cable connection unit

A resin composition including a base resin containing polyolefin, and an inorganic filler, wherein the inorganic filler includes: a core part containing Mg(OH), and a covering part containing a plurality of MgO particles provided on an outer periphery of the core part, the content of the inorganic filler in the resin composition is 0.1 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the base resin; and a volume fraction of Mg(OH)in one particle of the inorganic filler is 10% or more and less than 50%.

Resin composition, inorganic filler, direct-current power cable, and method for producing direct-current power cable

A tubular cable interconnect unit arranged on an outer periphery of a joint of a power cable, includes a tubular insulating tube, a non-ohmic resistor layer formed from a non-ohmic composition and provided on an inner peripheral surface of the insulating tube, and an inner semiconductive layer provided on the non-ohmic resistor layer, wherein the non-ohmic composition includes a base polymer including at least one of thermoplastic and rubber, and varistor grains having a non-ohmic characteristic in which a volume resistivity varies non-linearly with respect to an applied voltage, and the varistor grains have a maximum grain diameter of 30 &#x3bc;m or less.

Non-ohmic composition and method for manufacturing same, cable interconnect unit and cable end-connect unit

A submersible motor electric wire includes a conductor including a copper wire and an enamel coating formed on the periphery of the copper wire, and an insulating sheath layer formed outside the conductor. The insulating sheath layer includes a silane graft polymer as a main constituent. The silane graft polymer is formed by a graft-polymerization that an unsaturated silane compound and an organic peroxide are added to polyethylene, and is cross-linked contacting with water in the presence of a siloxane condensation catalyst. Alternatively, the insulating sheath layer includes a composition including polyethylene as a main constituent, and the composition is cross-linked by being irradiated with an ionizing radiation.

Submersible motor electric wire

A silane-crosslinked polyolefin insulated wire includes a conductor, and an insulating cover layer extruded on an outer periphery of the conductor. The insulating cover layer includes a silane-crosslinked polyolefin to be cross-linked by reacting water with a polyolefin having an alkoxysilyl group as a side chain. The insulating cover layer further includes a guanidine derivative having a boiling point of not less than 170&#xb0; C. and a melting point of less than 190&#xb0; C. in an environment at 760 mmHg as a crosslinking promoter to promote crosslinking of the polyolefin in an amount of not less than 0.05 parts by mass and not more than 0.5 parts by mass per 100 parts by mass of the polyolefin.

Silane-crosslinked polyolefin insulated wire

A cord switch includes a hollow insulation having a restoring force, a plurality of inner electrode wires provided along an inner surface of the hollow insulation, and an outer electrode provided on an outer surface of the hollow insulation. The outer electrode includes a plurality of outer electrode wires wounded on the outer surface of the hollow insulation, the outer electrode wires each including a copper wire and a plated layer formed on a surface of the copper wire, and the plated layer includes a transition metal except cobalt, manganese, copper, iron and vanadium, or a typical metal.

Cord switch

Growing community of inventors

Hitachi, Japan

Shuhei Yasuda