PET stands for Polyethylene Terephthalate. It is a type of plastic that is clear, tough and shatterproof and is widely used in the manufacturing of plastic bottles, film packaging, fabrics, moulded parts of automotive, etc. In its natural state, it is very flexible and colourless. However, depending on the processing method, it can be rigid or semi-rigid. PET resembles very much to Polybutylene Terephthalate chemically. We can say that it is a general-purpose thermoplastic polymer from the polyester family of polymers. Polyester resins have a wide range of properties such as thermal resistance, chemical resistance, mechanical and dimensional stability. These properties make it one of the most recycled thermoplastics. Its recycling symbol is '1'.