Abstract: 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 ?m or less.

Abstract: A resin composition forming an insulation layer, including a base resin containing polyolefin, and an inorganic filler; wherein a surface of the inorganic filler includes a hydrophobic silyl group represented by formula (1) and an aminosilyl group having an amino group.

Abstract: A resin composition molded article forming an insulation layer of a direct-current power cable, including: a cross-linked base resin containing polyethylene, and an inorganic filler having a mean volume diameter of 80 nm or less, wherein at least a part of a surface of the inorganic filler includes an aminosilyl group having an amino group, and a light transmittance at a wavelength of 500 nm of a sheet is 70% or more, as measured under an atmosphere at 90 , when the sheet is fabricated by cutting the resin composition molded article into 0.5 mm thickness.

Abstract: A resin composition forming an insulation layer, including a base resin containing polyolefin, and an inorganic filler; wherein a surface of the inorganic filler includes a hydrophobic silyl group represented by formula (1) and an aminosilyl group having an amino group.

Abstract: A resin composition forming an insulation layer, including a base resin containing polyolefin, and an inorganic filler; wherein a surface of the inorganic filler includes: an aminosilyl group having an amino group, and a hydrophobic silyl group having a hydrophobic group.

Abstract: A resin composition molded article forming an insulation layer of a direct-current power cable, including: a cross-linked base resin containing polyethylene, and an inorganic filler having a mean volume diameter of 80 nm or less, wherein at least a part of a surface of the inorganic filler includes an aminosilyl group having an amino group, and a light transmittance at a wavelength of 500 nm of a sheet is 70% or more, as measured under an atmosphere at 90, when the sheet is fabricated by cutting the resin composition molded article into 0.5 mm thickness.

Abstract: 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 ?m or less.

Abstract: An evaluation method for insulation performance includes: a step ? of applying a DC voltage to a first insulator and measuring an integration value of a current flowing through the first insulator from a start of application of the DC voltage after a prescribed time period; a step ? of applying a DC voltage to the second insulator on an applying condition that is identical to that in the step ? and measuring an integration value of a current flowing through the second insulator from a start of application of the DC voltage after a prescribed time period; and a step ? of comparing (i) a first graph obtained in the step ? and (ii) a second graph obtained in the step ?, to evaluate a difference between insulation performances of the insulators.

Abstract: An evaluation method for insulation performance includes: a step ? of applying a DC voltage to a first insulator and measuring an integration value of a current flowing through the first insulator from a start of application of the DC voltage after a prescribed time period; a step ? of applying a DC voltage to the second insulator on an applying condition that is identical to that in the step ? and measuring an integration value of a current flowing through the second insulator from a start of application of the DC voltage after a prescribed time period; and a step ? of comparing (i) a first graph obtained in the step ? and (ii) a second graph obtained in the step ?, to evaluate a difference between insulation performances of the insulators.

Abstract: An object of the present invention is to provide an electrically insulative resin composition that exhibits superior electrical properties and processability and an electric wire or cable having a covering made of the resin. The electrically insulative resin composition comprises 60 to 90 percent by weight of ethylene-?-olefin copolymer (A) polymerized with a single-site catalyst and 40 to 10 percent by weight of another polyolefin resin (B), which is other than (A), wherein the composition contains a polyolefin having a graft-polymerized substituent with a dipole moment of not less than 4 Debye.

Abstract: An object of the present invention is to provide an electrically insulative resin composition that exhibits superior electrical properties and processability and an electric wire or cable having a covering made of the resin. The electrically insulative resin composition comprises 60 to 90 percent by weight of ethylene-&agr;-olefin copolymer (A) polymerized with a single-site catalyst and 40 to 10 percent by weight of another polyolefin resin (B), which is other than (A), wherein the composition contains a polyolefin having a graft-polymerized substituent with a dipole moment of not less than 4 Debye.