How to Color Photovoltaic Cables During Insulation Extrusion

How to Color Photovoltaic Cables During Insulation Extrusion

To color photovoltaic cables during the extrusion of the insulation layer, the following methods are commonly used:

Addition of Color Masterbatch: During the extrusion process, color masterbatch (color concentrate) is added to the insulation material. Masterbatch consists of pigments or dyes blended with a carrier resin and is evenly mixed into the insulation material, resulting in a uniform color during extrusion.

Inline Color Strip Extrusion: In some cases, a color strip can be extruded onto the surface of the insulation layer. This helps identify cable types or phases without fully coloring the entire insulation layer.

Heating Extruder: The insulation material is heated to an appropriate temperature, causing it to soften and melt uniformly.

Extrusion: After the conductor passes through the extruder, the insulation material wraps around the conductor to form the insulation layer. This process requires precise control of material flow and extrusion speed to ensure uniform insulation thickness.

Cooling: After leaving the extruder, the cable is passed through a water tank or cooler to solidify and stabilize the insulation layer.