Patent ID: 8841557
Filing Date: 2014-09-23
Classification: H01B

Abstract:
1. A communications cable, said cable comprising: a polymer jacket; four twisted pairs, each twisted pair having two polymer insulated conductors twisted around one another wherein at least one of said four twisted pairs is insulated with an (Fire Resistance) olefin polymer and wherein at least another one of said four twisted pairs is insulated with PEI (polyetherimide); and a cross-filler arranged between said four twisted pairs, wherein said cross-filler is constructed of PEI (polyetherimide), wherein combination said polymers forming said insulation of said twisted pairs and said PEI polymer of said cross-filler are such that said communication cable meets the NFPA 262 flame test while simultaneously the stiffness of the cable caused by said PEI cross-filler is offset by said polymers forming said insulation of said twisted pairs so as not to impair the flexibility of said cable.