PREPARING METHOD OF MULTI-LAYERED FILM

摘要

Embodiments of the present invention can provide a multi-layered film which has improved reliability and adhesion in heat resistance and moisture resistance conditions and has excellent weather resistance and durability by forming a primer layer containing fluorine-based polymers and oxazoline group-containing polymers on a substrate through an inline coating process and forming a resin layer including fluorine-based polymers on the primer layer. The multi-layered film is used for a back sheet for a photovoltaic module and can provide a photovoltaic module which can maintain improved durability even when exposed to external environment for a long term.