Production of Coaxial Cables with Extrusion Foaming using Butane as Blowing Agent

In this paper, an experimental study on manufacture and characterization of an insulating foam coating for coaxial cables is presented. Coaxial cables are widely used in communication industries with various insulating media. Using foam as the insulation is becoming more favorable and plays a key role in the attenuation properties of these cables. In this research work, an extrusion setup was prepared to produce foam insulated coaxial cable using butane as the physical foaming agent and various polymeric blends to achieve a desirable (low) attenuation. The effects of melt temperature and die geometry (die gap and die outlet diameter) on foam morphology were investigated. The results show that an acceptable low loss-attenuation is achievable via using an appropriate polyethylene blend and adjusting processing parameters.

کلیدواژه ها:

Coaxial Cable ، Foam Insulation ، Extrusion Process