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Man's necktie
MFA# 2007.971


[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.

For identification of Dacron fibers, see http://cameo.mfa.org/wiki/Category:FRIL:_Polyester

Dacron at 200x
Dacron at 200x polarized light

Synonyms and Related Terms

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








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

Physical and Chemical 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 C
Density 1.38 g/ml
Refractive Index 1.54, 1.72


Properties of Synthetic Fibers

Resources and Citations

  • 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, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 625
  • 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