![]() When used for containers and other purposes, it is called PET or PET resin. ![]() DuPont later branded its PET fiber as "Dacron." Today, more than half of the world's synthetic fiber is made from PET, which is called "polyester" when used for fiber or fabric applications. PET was first synthesized in North America in the mid-1940s by DuPont chemists searching for new synthetic fibers. The resin pellets are then heated to a molten liquid that can be easily extruded or molded into items of practically any shape. The resulting spaghetti-like strands of PET are extruded, quickly cooled, and cut into small pellets. The basic building blocks of PET are ethylene glycol and terephthalic acid, which are combined to form a polymer chain. Special grades of PET are used for carry-home food containers and prepared food trays that can be warmed in the oven or microwave. It is also popular for packaging salad dressings, peanut butter, cooking oils, mouthwash, shampoo, liquid hand soap, window cleaner, even tennis balls. Virtually all single-serving and 2-liter bottles of carbonated soft drinks and water sold in the U.S. PET is a clear, strong, and lightweight plastic that is widely used for packaging foods and beverages, especially convenience-sized soft drinks, juices and water. PET (also abbreviated PETE) is short for polyethylene terephthalate, the chemical name for polyester. An Introduction to PET ( polyethylene terephthalate)
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