Polyester film has excellent performance and low industry concentration

polyester film (pet) is a film material made from polyethylene terephthalate as raw material through processes such as drying, melting, extrusion, casting, and stretching. polyester film can be divided into ultra-thin polyester film, thin polyester film, medium-sized polyester film and thick polyester film according to different thicknesses; according to different stretching processes, it can be…