Since the introduction of the first biaxially stretched polypropylene film (BOPP) production line from Germany in 1989, Tongfeng people have worked diligently in the field of capacitor film, constantly exploring and practicing, taking it as their responsibility to drive industry innovation, and emerging new products and technologies to meet customer needs。At present, Tongfeng has six polypropylene film production lines, with an annual output of 18,000 tons of various types of polypropylene film。The product varieties are coarse film, corona treated coarse film, corona treated flat film and non-corona treated flat film。The product's temperature rating is 70 °C, 85 °C, 100 °C and 115 °C。Product thickness from 2.2 microns to 18 microns。