The so-called optical PET film is an optical PET film that is coated on the surface of optical parts to change the optical characteristics of the surface of optical parts. Optical PET film is divided into reflective film, antireflection film, filter film, optical protective film, polarizing film, spectroscopic film and phase film according to application. The first four are commonly used.
The outstanding characteristics of optical grade polyester film: it has excellent optical properties such as low haze and high light transmittance, high surface finish, and small thickness tolerance. It is mainly used for diffusion film, brightness enhancement film, reflective film, etc. in high-end liquid crystal display equipment. Antistatic protective film, protective film in touch screen, flexible display film and other fields. Among the upstream raw materials of liquid crystal panels, optical films are used in backlight modules, polarizers, and liquid crystal materials. Liquid crystal display is the current mainstream flat panel display technology, which is widely used in fields such as LCD TVs, notebook computers, monitors, and mobile phones. In the entire TFT-LCD production process, the total area required for optical films is about 15-20 times that of the panel, and the cost is about 15-20% of that of the LCD panel.
China is becoming the world's largest producer of flat panel display equipment, and the explosive growth of the domestic touch screen industry has prompted a rapid increase in the demand for optical films. Optical films have become one of the most important strategic raw materials at the front end of the optoelectronic industry chain.