Gentle and powerful: planetary roller extruder for EVA sheet

摘要

ENORMOUS outputs of up to 2 t/h can be achieved in the production of EVA sheet for solar panels with the PWE 250 planetary roller extruder from Battenfeld-Cincinnati, Bad Oeynhausen/Vienna. In addition to high performance, this machine concept stands out by its extremely gentle treatment of the materials processed. This is why some 15 extrusion lines are already in operation worldwide in this growth market. Today, solar cells for photovoltaic modules are regularly embedded in EVA sheet. This sheet protects the sensitive silicon cells, which transform sunlight into electrical energy, from environmental damage such as corrosion or impact. For this purpose, the sheet must be electrically insulating, very tough and simultaneously highly transparent and UV-resistant. Each m~2 of panel requires 500 g of EVA per layer, i.e. a total of 1 kg. Thanks to its excellent processing and long-term stability properties, EVA has a market share of about 90% in the steadily growing solar energy market.