Back sheet for photovoltaic modules and photovoltaic module using the same
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United States of America Patent
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Issued Date -
Mar 6, 2008
app pub date -
Aug 28, 2007
filing date -
Aug 30, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An object of the invention is to provide a back sheet for photovoltaic modules that is excellent in various characteristics such as weather resistance, durability, water resistance, heat resistance, gas barrier properties, toughness and the like, and is particularly excellent in adhesiveness to the filler layer and in resistance to hydrolysis and voltage endurance, and that has favorable manufacturability and cost reduction capability, and a photovoltaic module using the same. The back sheet for photovoltaic modules of the present invention is a laminate having a front face side resin film, a barrier film and a back face side resin film in this order, in which the front face side resin film contains polyolefin (polyethylene) as a principal component. A voltage endurable film may be provided between the front face side resin film and the barrier film. An aluminum foil, or a laminated film of inorganic oxide layers may be used as the barrier film. Each film constructing the laminate may be laminated via an adhesive layer. The back face side resin film may contain PEN or PET as a principal component.
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