Dacron was invented in 1951, and is the proprietary name (reg. U.S. Patent Office) by E.I. du Pont de Nemours & Co for a polyester fiber. Dacron, which is best known for clothing purposes, is a condensation polymer obtained from ethylene glycol and terephthalic acid. Dacron is popular because of is high tensile strength, its high resistance to stretching in both wet and dry forms and its hardy resistance to degradation by chemical bleaches.
The highly versatile fiber is also used in curtains and fire hoses. The fiber is mixed with wool and other traditional clothing fabrics to create durable, washable clothing. Dacron is even used in special thread that is used to surgically repair damaged sections of heart muscle and blood vessel walls.