Conductor insulation largely influences the cable’s bandwidth and signal energy loss. The proprietary CAFPE® (Combined Air-Foamed Polyethylene) insulation, developed by Tchernov Cable, is based on hot PE extrusion. The 3-layer CAFPE® comprises two layers of solid PE and an air-foamed PE in between. It surpasses other insulators in terms of dielectric permittivity and is used in coaxial designs.
The 2-layer CAFPE®, used in symmetrical cables, consists of an extended inner air-foamed PE layer and a thin solid PE as an outer layer. Substitution of solid PE with the foamed one converts into a significant decrease of cable’s distributed capacitance, signal attenuation and dispersion. The modified extrusion tooling enables consistent structural uniformity and homogeneity of each insulation layer.
