In order to achieve the desired electrical properties, insulating materials are foamed with air bubbles. Physical foaming is the process in which nitrogen gas is externally injected under pressure into the material during the extrusion of the insulating material. Chemical foaming, on the other hand, is the process carried out by adding certain special chemical foaming agents to the insulating materials.

Cables with physical foaming, compared to chemically foamed cables, have a more stable and homogeneous structure, lower attenuation values, a smoother impedance curve, and better electrical properties. They are also resistant to moisture and have waterproof characteristics. In addition, the service life of chemically foamed cables is shorter, while that of physically foamed cables is longer.

At 2M Cable, we apply physical foaming during our production processes.