| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel non-shield pair type cable wherein both a stable transmission characteristic and high flame retardancy are acquired and, at the same time, water resistant property is improved and therefore cable characteristices does not decrease in long time use. SOLUTION: This cable is a non-shield pair type cable wherein at least one or more of units 6 each made by bundling a plurality of pair-twisted wires 4 are bundled and equipped with a collective sheath 8 therearound. In this event, there are provided, in each of the units 6 or among the units 6, plastic interpositions 5, 7 each comprizing two layers, an inner layer 9 and an outer layer 10, and, along with this, this inner layer 9 is formed of a resin composite including a non-halogen grouped flame retardant agent and the outer layer 10 is formed of a resin composite which satisfies a condition that water vapor permeability evaluated by the use of a 0.5mm thick film is 10(g.m<-2> .24hr<-1> ) or less and includes no halogen. |
