COMMUNICATION CABLE AND METHOD FOR MANUFACTURING THE SAME

To provide a high-quality communication cable having excellent electric characteristics.SOLUTION: A communication cable comprises a cable core formed by twisting, at a prescribed collection pitch length, a plurality of pair twisted wires formed by twisting two insulated electric wires at a prescribed pair pitch length. One of the insulated electric wires constituting each pair twisted wire is a monochromatic insulated electric wire with a conductor covered by a monochromatic insulator, and the other is an insulated electric wire with color bands, where a conductor is covered by an insulator with n color bands extending in the length direction. The untwisting rate of each pair twisted wire is larger by 7 to 8 times than the pair pitch length of each pair twisted wire. The collection pitch length is larger by 1.3 to 1.5 times than a minimum value among a plurality of untwisting rates, and smaller than 100 nm.SELECTED DRAWING: Figure 3 【課題】電気特性が良好な、高品質な通信ケーブルを提供する。【解決手段】上記課題を解決する通信ケーブルは、２本の絶縁電線を所定の対ピッチ長で撚り合わせた対撚線を複数本、所定の集合ピッチ長で撚り合わせたケーブル心を備え、各前記対撚線を構成する前記絶縁電線の一方が、単色の絶縁体で、導体を被覆した単色絶縁電線であり、他方が、長さ方向に延在する色帯をｎ本有する絶縁体で、導体を被覆した色帯付絶縁電線であり、各前記対撚線の撚り返し率が、各前記対撚線の前記対ピッチ長の７倍以上８倍以下であり、前記集合ピッチ長が、複数の前記撚り返し率のうちの最小値に対して１．３倍以上１．５倍以下、かつ１００ｍｍ未満である。【選択図】図３