The cylinder is heated within several heating zones. Additionally, the last 4 heating zones are air-cooled to improve the regulation time. The cooling is particularly suitable for improving yarn properties in the event of high viscosity, especially when more extreme drawing values are involved.

Control of the extruder is accomplished using a batch of sensors in the extruder measuring head and in the spin beam. The control software has an additional program enabling self-optimisation of the control parameter values. The goal is to achieve high precision for the cylinder temperature and rapid adjustment of the control parameter settings to reach the perfect melt quality without ring formation and high back-flow ratio.

SwissTex has used a wide range of polymers and special software to adapt the extruder screw geometry to the customer's polymer specification. The geometry of the SwissTex extruder screw is calculated ad hoc for each project and takes into account the flexibility of the extrusion line, in terms of polymer specifications and throughput.