| 摘要 |
An embodiment of the present invention forms a primer layer, which includes fluorinated polymers and polymers including an oxazonline group, on a substrate and forms a resin layer, which includes fluorinated polymers, on the primer layer in order to have enhanced reliability and adhesion under a heat resistant / wet proof condition and provide a multi-layered film with enhanced weather resistance and durability. In addition, the multi-layered film can be manufactured at low costs and at low and dry temperatures using a low boiling point solvent so that manufacturing cost can be reduced and deterioration of products due to thermal strain or thermal shock can be prevented. Such multi-layered film can be effectively used for a back sheet for photovoltaic modules and the likes in order to provide the photovoltaic module capable of maintaining excellent durability even after being exposed to external environment for long time. |
