What does pta mean? PTA is the abbreviation of purified terephthalic acid, and it is one of the important bulk organic raw materials. Its main use is to produce polyester fiber (polyester), polyester bottle chips and polyester films, which are widely used in chemical fiber, light industry, electronics, construction and other aspects of the national economy. , and is closely related to people's living standards. PTA futures, that is, lead trading varieties with phthalic acid as the subject matter, are futures varieties listed on commodity futures exchanges.