08 August 2011
Henkel will present an extensive product portfolio for automated production of solar modules at this year's EU PVSEC that takes place 5 to 9 September, 2011 in Hamburg, Germany.
Among other things, the specialists at Henkel will be bringing along different solutions for different backsheet structures used in PV solar modules. With two-component PUR systems developed under the Liofol brand, the world number one in sealants and adhesives has now applied its entire expertise in laminating technology to solving the problems of the solar industry.
The main components of solar modules with photovoltaic cells of crystalline silicon are the glass lens, two EVA sheets (ethylene vinyl acetate) in which both the silicon solar cells and the electrical contacts are embedded, and then a final layer in the form of a protective, backsheet, usually comprised of a multi-film laminate. UV resistance is also paramount as the backsheet must not be allowed to yellow. “Added to this is the fact that, during the module manufacturing, the adhesives have to readily withstand temperatures of up to 150 degrees Centigrade for periods of 25 to 35 minutes,” Tomke continues. The composite sheets laminated with Liofol adhesives are therefore subjected to a whole raft of rigorous industrial tests. With ever changing industrial standards, the laminates are often time subjected to thermal resistance test at temperature of 200 degrees Centigrade, weathering of 85 degress Centigrade at 85 per cent relative humidity for 1,000, 2,000 or 3,000 hours, depending on customer demands.
Visit Henkel at Hall B6, Stand B11.