Sumitomo Electric Industries, Limited

Atsuko Shinomiya

Taro Fujita

Masahiro Tozawa

Yuji Ochi

Motoi Matsuda

Kenichiro Iwama

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

An electric cable for improving flexibility of an insulating resin portion of the electric cable expressed by a secant modulus value is provided. In an electric cablein which an outer periphery of a conductormade of wires with diameters from 0.15 to 0.5 mm and having a cross-sectional area of 20 mmor more is covered with an insulating resinincluding a flame retardant, a ratio of an electric cable diameter to a conductor diameter is from 1.15 to 1.40, and a secant modulus of the insulating resinis from 10 to 50 MPa.

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Kanuma, Japan

Atsuko Shinomiya