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A manufactured fiber prepared from polymers containing a urea group in the repeating unit. Polyurea was first manufactured in the 1940's. By 1958, small amounts were being commercially produced in Japan and sold as Urylon. However, the process is expensive and the fiber has not been widely used. Polyurea fibers are similar to Nylon and have good resistance to solvents, acids, sunlight and insects. It is used primarily in fishing lines, nets, and ropes.

Synonyms and Related Terms

Urylon [Toyo Koatsu Industries]

Physical and Chemical Properties

  • Resistant to acids, alkalis and most organic solvents.
  • Fiber is smooth.
  • Cross section is circular.
  • Tenacity = 4.5-5.5 g/denier;
  • Elongation 15-20%;
  • Moisture regain = 1.8%
Melting Point 240 C
Density 1.07 g/ml
Molecular Weight Softening pt = 205 C

Resources and Citations

  • J.Gordon Cook, Handbook of Textile Fibres:II Man-made Fibres, Merrow Publishing Co. , Durham, England

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