Polyethylene terephthalate (sometimes written poly(ethylene terephthalate)), commonly abbreviated
PET,
PETE, or the obsolete PETP or PET-P, is the most common
thermoplastic polymer resin of the
polyester family and is used in
fibers for clothing,
containers for liquids and foods,
thermoforming for manufacturing, and in combination with glass fiber for engineering
resins.