Extrusion lines for encapsulation film

image_thumbAt the production of PV Solar panels, EVA films are used for encapsulation of cells and has to fulfill special requirements, e.g. low shrinkage or better no shrinkage. Standard extrusion lines only allow a very low processing speed. At speed over 5m/min a high shrinkage of the film can occur so that a further processing of this film is no longer possible. Breyer (Singen, Germany)  developed a system for the production of EVA film and other gluey materials, allowing much higher speed and therefore higher output compared with  typical extrusion systems. Breyer says that this process allows an almost shrinkage-free production of solarfilm at high speed and gluey materials like EVA can be processed easier on this system compared with a calender/cast film unit.