It is five layers, I. E. Alucosuper PVDF coated top side and back side, upper and lower polymer adhesive film, and PE core(at viscous molten state) through compositing, setting and cooling with advanced processes. It has high strenght, stable dimensions, flat surface, inner stress lower than the same kind, even and rich colors of coating, outstanding adhesion, and excellent corrosion resistance, weather resistance and contamination resistance, being and kind of ideal curtain material for decoration of interior and exterior walls.