Mylar Specialty Films U.S. (formerly known as DuPont Teijin Films U.S.) is a company that manufactures and produces polyester films. It offers materials for labelling, printing, capacitor dielectrics, cards, packaging, etc. The company also provides sealants, lamination, perforation and barrier products, polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) films, and other products. Mylar Specialty Films U.S. caters to the renewable energy, electronics, healthcare, and convenience packaging markets.