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In the early Seventies, the expertise was developed for blow-stretch molding PET into bottles. PET was first synthesized in North America within the mid-1940s by DuPont chemists searching for new artificial fibers. DuPont later branded its PET fiber as “Dacron.” Today, more than half of the world’s synthetic fiber is created from PET, which is identified as “polyester” when used for fiber or fabric purposes.