Mini-coax cable insulation lines: Foam/Skin & Skin/Foam/Skin processes
CI A1 - CI A2
Mini-coax cables, CATV cables and radio-frequency cables are primarily characterised by their electrical impedance and the speed with which signals are propagated. The common denominator of both signal propagation and dielectric constants is the cable insulation material.
Nowadays, market demand requires very low dielectric constants which can only be achieved by physical foaming extrusion processes.
With a wealth of experience in physical foaming by nitrogen injection, Sampsistemi lines can obtain a dielectric constant of 1.2, which corresponds to a polyethylene foaming degree of 81%.
Other important cable parameters, such as low attenuation and structural return loss require extremely high precision from all extrusion line components, since it is necessary to achieve a line speed stability of 1/10000 without extruder output pulsing, no problem for lines by Sampsistemi.
Technical features
+ Structural return lost frequency up to 3 GHz
+ Calibrating and degreasing group
+ Dual capstan with tension gauge
+ Melt flow regulation unit
