Extrusion is a common process in thermoplastics industry. By forcing the molten polymer into a die, this process is the basis for production of tubes, films and tapes. It is also used for more complex profiles, for example rectangular rods or bars.
For thermoplastics, extrusion is precious as it is a continuous process suitable for high length products. To provide a global quality and constant performance of extruded high performance plastics, high stability in the process is required: melting, cooling and crystallinity control, extruder speed and pressure.
Tubes, rods, films and tapes each have specific requirements. For example, high precision extrusion of tubes also require fine control of eccentricity in the die, for low thickness walls or low tolerance tube walls. That’s especially true for high performance plastics extrusion as they require higher temperature, and equipments based on less sensitive materials.