Rough Film

About this product

Made from imported ultra-high purity electrical-grade homopolymer polypropylene resin Uniform thickness distribution Even void ratio High operating electric field strength Low dielectric loss Good compatibility with various capacitor impregnating oils and easy winding

Category: Mainly used in high-voltage power transmission & transformation, smart grid, rail transit, industrial control and other fields

Since introducing its first biaxially oriented polypropylene (BOPP) film production line imported from Germany in 1989, Tongfeng has focused on capacitor-grade polypropylene film for decades. We continuously upgrade technologies, develop new products and drive innovative progress across the industry. The company now operates 8 dedicated polypropylene film production lines, with an annual output capacity of 20,000 tons. Our product portfolio comprises roughened film, corona-treated roughened film, corona-treated flat film, non-corona-treated flat film, and base films for composite current collectors. The products feature temperature resistance grades ranging from 70°C, 85°C, 100°C to 115°C, with thickness spanning 2.0 μm to 18 μm, enabling precise matching for diverse operating conditions and customized requirements from global clients.