The line is used to produce high performance, innovative, fluorine-free solar photovoltaic backpanels in line with the green manufacturing trend; Production line adopts multi-layer co-extrusion technology, according to the rheological properties of raw materials to design special screw structure, through the accurate multi-layer distribution technology, unique tempering design, with high precision thickness measuring instrument, visual detection system and automatic winding system, fully guarantee the excellent quality of products.