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[DuPont] A registered trademark for a polyester fiber made of polyethylene terephthalate. In 1951, Dacron, along with Terylene in England, became the first commercially marketed polyester fiber. Dacron is available as yarn, staple, and fiberfill. Polyester is durable, strong, and washes well. It has good resistance to bleaches, ketones, alcohols, soaps, detergents, and dry cleaning agents. Dacron is also resistant to creasing, abrasion, heat aging, sunlight, and insect attack. It is used for clothing, curtains, belts, fire hoses, and filled products.


Synonyms and Related Terms

polyester; polyethylene terephthalate; Terylene [ICI]; Fiber V;





Other Properties

Resistant to cold acids, weak alkalis, bleach and most organic solvents. Degrades in strong alkalis, strong hot acids, cresol. Tenacity = 2.8-5.2 Elongation = 19-30% Moisture regain = 0.4%

Melting Point 250-260
Density 1.38
Refractive Index 1.54, 1.72

Hazards and Safety

Difficult to ignite. Burns with a shiny, yellow-orange, sooty flame. Self-extinguishing

Additional Information

DuPont Dacron: Website


Properties of Synthetic Fibers

Additional Images

Sources Checked for Data in Record

  • Marjory L. Joseph, Marjory L. Joseph, Introductory Textile Science, Holt, Rinehart and Winston, Fort Worth, TX, 1986
  • Identification of Textile Materials, The Textile Institute, Manchester, England, 1985
  • G.S.Brady, G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 625
  • Richard S. Lewis, Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 7730

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