In order to improve the efficiency of high power transmission and reduce power transmission losses, ultra-high voltage power systems are commonly used in power transmission systems. Therefore, the materials used must have low dielectric properties, high insulation, and the optical PET release film is a transparent resin with low water absorption, excellent heat resistance, and small specific gravity. It can be used as a substrate for optical recording materials, with excellent physical and chemical capabilities. Therefore, it has always been very useful in industrial production. It has excellent optical properties, thermal stability, and light aging resistance, and is mainly used in traffic reflective signs, billboards, and industrial safety signs with reflective requirements.