Whatsapp: +86-18069229979. Purified Terephthalic Acid is obtained through petroleum processing, extraction, and reaction, mainly used to produce polyester, which is a key raw material for the production of chemical fiber products, including polyester fibers (polyester), polyester films, and polyester bottle sheets. As one of the leading purified terephthalic acid suppliers, Neo Lianda is dedicated to providing high-purity PTA for a wide range of industrial applications.