Polyester filament refers to a filament made of polyester, with a length of more than one kilometer, wound into a group.
Polyester is an important variety of synthetic fibers, and it is the trade name of polyester fiber in China. It uses purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (MEG) as raw materials to prepare fiber-forming polymer-polyethylene terephthalate ( PET), made by spinning and post-processing.