| 摘要 |
PROBLEM TO BE SOLVED: To promote the prevention of damages to an insulator, withstand voltage defect, cross contact and deterioration in electric characteristics caused by pressure at the time of connector pressure contact, flexure or bending or the like during installation. SOLUTION: In this twisted-pair cable, the twisted-pair wires 1 are composed of two twisted insulated core wires 6 which are composed of conductors 61 such as annealed copper twisted wires, tin coated annealed copper twisted wires or the like having flexibility, and which are installed with an insulator 62 around the outer periphery, wherein four pairs of twisted-pair wires 1 are twisted at respectively different pitches. The insulator 62 composing the twisted-pair wires 1 is composed of a foaming layer 62a composed of a polyethylene resin with a foaming ratio of 30 to 70% which is installed at the outer periphery of the conductor 61, and a skin layer 62b composed of a high density polyethylene resin with the thickness of 0.03 to 0.06 mm which is installed at the outer periphery of the foaming layer 62a, while the core outer diameter of the insulated core wire 6 as a whole is made to be 1.0 mm or less. COPYRIGHT: (C)2006,JPO&NCIPI
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